HomeMy WebLinkAbout2019.09.23 Council Workshop PacketWorkshop Meeting
AGENDA
PASCO CITY COUNCIL
7:00 p.m.
September 23, 2019
Page
1. CALL TO ORDER:
2. ROLL CALL:
(a) Pledge of Allegiance
3. VERBAL REPORTS FROM COUNCILMEMBERS:
4. ITEMS FOR DISCUSSION:
3 (a) Presentation - TRIDEC Update on the Regional Rivershore
Reconveyance Project
Presented by David Reepleog from the Tri-City Development Council
(TRIDEC)
4 (b) Presentation - Cleanup Action Plan for the Pasco Landfill Site
Presented by Chuck Gruenenfelder, Hydrogeologist, Washington State
Department of Ecology
5 - 20 (c) Presentation on Affordable Housing Efforts and Options
21 - 33 (d) 2019 Annual Street Preservation Program
34 - 187 (e) Design and Construction Standards and Specifications for Public Works
Improvements
5. MISCELLANEOUS COUNCIL DISCUSSION:
6. EXECUTIVE SESSION:
7. ADJOURNMENT.
REMINDERS:
• Wednesday, September 25, 7:30 - 8:30 AM: Visit Tri-Cities Board Meeting - 7130
W. Grandridge Boulevard, Kennewick, WA (Councilmember Serrano, Rep.; Mayor
Page 1 of 187
Workshop Meeting September 23, 2019
Pro Tem Maloney, Alt.)
• Thursday, September 26, 4:00 to 5:00 PM: TRIDEC Board Meeting - 7130 W.
Grandridge Boulevard, Kennewick, WA (Councilmember Milne, Rep.; Mayor Pro
Tem Maloney, Alt.)
This meeting is broadcast live on PSC-TV Channel 191 on Charter Cable and
streamed at www.pasco-wa.gov/psctvlive.
Audio equipment available for the hearing impaired; contact the Clerk for assistance.
Spanish language interpreter service may be provided upon request. Please provide
two business day's notice to the City Clerk to ensure availability. (Servicio de
intérprete puede estar disponible con aviso. Por favor avisa la Secretaria Municipal
dos días antes para garantizar la disponibilidad.)
Page 2 of 187
AGENDA REPORT
FOR: City Council September 18, 2019
TO: Dave Zabell, City Manager Workshop Meeting: 9/23/19
FROM: Zach Ratkai, Director
Administrative & Community Services
SUBJECT: Presentation - TRIDEC Update on the Regional Rivershore Reconveyance
Project
I. REFERENCE(S):
II. ACTION REQUESTED OF COUNCIL / STAFF RECOMMENDATIONS:
Presented by David Reepleog from the Tri-City Development Council (TRIDEC)
III. FISCAL IMPACT:
IV. HISTORY AND FACTS BRIEF:
V. DISCUSSION:
David Reepleog from the Tri-City Development Council (TRIDEC) will provide an
update on the latest with regard to the regional rivershore reconveyance effort.
Page 3 of 187
AGENDA REPORT
FOR: City Council September 20, 2019
TO: Dave Zabell, City Manager Workshop Meeting: 9/23/19
FROM: Bob Gear, Fire Chief
Executive
SUBJECT: Presentation - Cleanup Action Plan for the Pasco Landfill Site
I. REFERENCE(S):
II. ACTION REQUESTED OF COUNCIL / STAFF RECOMMENDATIONS:
Presented by Chuck Gruenenfelder, Hydrogeologist, Washington State Department of
Ecology
III. FISCAL IMPACT:
IV. HISTORY AND FACTS BRIEF:
V. DISCUSSION:
Page 4 of 187
AGENDA REPORT
FOR: City Council September 18, 2019
TO: Dave Zabell, City Manager Workshop Meeting: 9/23/19
FROM: Jacob Gonzalez, Senior Planner
Community & Economic Development
SUBJECT: Presentation on Affordable Housing Efforts and Options
I. REFERENCE(S):
Memorandum to City Council
PowerPoint Presentation
Association of Washington Cities - 1406 Implementation
Association of Washington Cities - June 2019 Memorandum
II. ACTION REQUESTED OF COUNCIL / STAFF RECOMMENDATIONS:
Discussion.
III. FISCAL IMPACT:
IV. HISTORY AND FACTS BRIEF:
The 2019 Legislative Session finished with several new bills focused on increasing
affordable housing across the state. These bills ranged from funding (revenue)
generating opportunities for local governments to residential density increases in urban
areas. The purpose of this report is to provide a summary of the bills, their intent, and
the impact on current and future planning policies for the City of Pasco.
V. DISCUSSION:
Page 5 of 187
CITY COUNCIL WORKSHOP MEETING
City Hall – 525 North Third Avenue – Council Chambers
MONDAY, SEPTEMBER 23, 2019
7:00 PM
1
Identifying solutions for more affordable housing has been an increasingly emphasized focus
across our state and nationwide.
In Washington, there are over 234,000 extremely low-income renter households, with a shortage
of over 165,000 affordable and available housing units. Locally, over 11,000 households
experience a housing problem in the Tri-Cities. Housing problems include those that are cost-
burdened, where 30% or more of the household income is devoted to housing costs, overcrowding
and lack of kitchen and plumbing facilities.
The City currently provides housing assistance through a n assortment of programs originating
from the Community Development Block Grant program including a down payment assistance
program, rehabilitation and direct funding to community housing development organizations. The
City of Pasco also provides Neighborhood Stabilization Program and is a member of the Tri-Cities
HOME Consortium.
Additionally, several recently adopted zoning code amendments (lot frontages, lot sizes and
building heights) have been adopted which have the potential to increase housing construction
and slow the rate of increase in housing costs.
The 2018-2019 Legislative Session passed several bills addressing affordable housing issues. These
bills ranged from funding (revenue) generating opportunities for local governments to residential
density increases in urban areas although not all have direct applicability for the City of Pasco. A
summary of these bills is provided below.
SUBSTITUTE HOUSE BILL 1406
AFFORDABLE AND SUPPORTIVE HOUSING--LOCAL SALES AND USE TAX
HB 1406 creates a sales tax revenue sharing program that allows cities and counties to
access a portion of state sales tax revenue to make local investments in affordable housing.
Over a 20-year commitment, the state will be sharing more than $500 million with local
governments. To take advantage of this funding source, cities an d counties must pass a
resolution of intent by January 31, 2020 and adopt a tax ordinance by July 27, 2020.
ENGROSSED HOUSE BILL 1219
REAL ESTATE EXCISE TAXES--AFFORDABLE HOUSING AND HOMELESSNESS PROJECTS
EHB 1219 authorizes counties and cities to use certain real estate excise tax (REET 2)
revenue for facilities serving the homeless and for affordable housing projects until January
1, 2026.
Page 6 of 187
2
ENGROSSED SECOND SUBSTITUTE HOUSE BILL 1923
URBAN RESIDENTIAL BUILDING CAPACITY
HB 1923 is intended to incentivize cities to take actions to increase the variety of housing
types available and to increase urban residential density. Cities can obtain planning grants
from the state if they commit to taking specified planning actions or developing Housing
Action Plans consistent with the legislation.
The law exempts certain non-project actions taken pursuant to the new law from appeal
under the State Environmental Policy Act (SEPA) or the Growth Management Act (GMA)
but only if completed prior to April 1, 2021.
ENGROSSED SUBSTITUTE SENATE BILL 5383
AUTHORIZING TINY HOUSE COMMUNITIES
The legislation directs the state building code council to adopt building code standards for
tiny houses. The new law amends the binding site plan provisions in Chapter 58.17 RCW to
allow the use of binding site plans for tiny house communities. The bill also defines tiny
houses on wheels so they do not need to be lumped into the category of a recreational
vehicle, which typically cannot be used for permanent dwellings. The new law also gives
local governments the option of adopting an ordinance to regulate the siting of tiny house
communities.
ENGROSSED SENATE BILL 5334
UNIFORM COMMON INTEREST OWNERSHIP ACT--VARIOUS PROVISIONS
Changes the implied warranties associated with condominium development, so there
should be fewer lawsuits and it should become more economically viable for developers to
construct condominiums.
SUBSTITUTE HOUSE BILL 1377
AFFORDABLE HOUSING DEVELOPMENT ON RELIGIOUS ORGANIZATION PROPERTY
Certain cities and all cities and counties planning under the GMA must allow an increased
density bonus for affordable housing development (either single-family or multifamily) on
property owned or controlled by a religious organization, provided certain conditions are
met. The housing must be affordable to households earning less than 80% of the area
median income and must remain affordable for at least 50 years—regardless of whether
the religious organization continues to own the property.
Page 7 of 187
3
Staff have started analysis on the new legislation and the effects they may have on local decision-
making and policies. In addition, staff is looking at potential tools and incentives to support
housing construction and infill projects.
Staff will continue to update Council on the new legislation including areas to offer additional
support for housing.
Page 8 of 187
Pasco City Council Meeting
September 23, 2019
Affordable HousingPage 9 of 187
Affordable Housing
Statewide
•Over 234,300 renter households that are extremely low-income
•Shortage of 165,345 affordable and available housing units
•39% of extremely low-income households are in the labor force; 24% persons with
disabilities; 28% seniors
Source: National Low Income Housing Report (www.NLIHC.ORG) March 2018
Page 10 of 187
Affordable Housing
0
5
10
15
20
25
Whitman Kittitas Whatcom Skagit Spokane King Yakima Benton Franklin Asotin Garfield Grant Douglas LincolnPercent of County HouseholdsCounty
Severe Cost-Burdened Households in Washington (50% + of Income for Housing)
Source: American Community Survey 2013-2017Page 11 of 187
Affordable Housing
0.00%
5.00%
10.00%
15.00%
20.00%
25.00%
30.00%
35.00%
40.00%
45.00%
Pasco Kennewick Richland Spokane Yakima Olympia VancouverPercent of HouseholdsCost-Burdened Households (30% + of Income for Housing)
Renter Owner
Source: US Department of Housing & Urban Development; Comprehensive Housing Affordability Strategy Data (2012-2016)Page 12 of 187
Programs & Resources
Housing Authority of the City of Pasco and Franklin County
•Affordable Housing Rental Subsidy (families at or below 30% of AMI)
•Housing Choice Voucher Program (Section 8)
•Affordable Apartments & Highland Park Homes (families with incomes between 50 –80% of Tri-City AMI)
Tri-Cities HOME Consortium Downtown Payment Assistance Program
•Joint partnership with the City of Kennewick and the City or Richland
Benton Franklin Community Action Committee
•Permanent Supportive Housing
•Rapid Re-Housing
•Tenant Based Rental Assistance Program
Benton & Franklin Counties Department of Human Services
•Housing Resource CenterPage 13 of 187
Current / Ongoing Efforts
Amendments / Revisions to the Pasco Municipal Code
•Shared Street Frontages Ordinance 4444 (Adopted July 2019)
•Allows challenged parcels to be subdivided via a shared (private) street or frontage
•Minimum Lot Size Ordinance 4445 (Adopted July 2019)
•Decreased minimum lot size (and frontage) requirements in the R-2, R-3 and R-4 residential zoning districts
•Building Height Ordinance (September 2019)
•Increased permitted building heights in the R-3 and R-4 residential zoning districts
•Planned Unit Development Revisions (Planning Commission October 2019)
•Revisions to minimum site area for Planned Unit DevelopmentsPage 14 of 187
End of Presentation
Page 15 of 187
Carl Schroeder
Government Relations Advocate
carls@awcnet.org
06/20/19
Shannon McClelland
Legislative & Policy Analyst
shannonm@awcnet.org Contact:
Association of Washington Cities • 1076 Franklin St SE, Olympia, WA 98501 • 1.800.562.8981 • wacities.org
Carl Schroeder
Government Relations Advocate
carls@awcnet.org
06/20/19
Shannon McClelland
Legislative & Policy Analyst
shannonm@awcnet.org Contact:
Association of Washington Cities • 1076 Franklin St SE, Olympia, WA 98501 • 1.800.562.8981 • wacities.org
Tax credit rate examples
Max tax
credit rate
under HB
1406
City with
qualifying
local tax
City
without
qualifying
local tax
City doesn’t
levy a tax
credit,
county does
participate
County doesn’t
participate, city
participates but
doesn’t have a
qualifying tax.*
City 0.0146%0.0073%0.0%July 2020: 0.0%
County 0.0%0.0073%0.0146%0.0%
*We believe that this was an error in bill drafting. Please let us know if you are in
this situation. We can work to address it in future legislative sessions.
Eligible uses of the funds:
1. Projects must serve those at or below 60% AMI.
2. Acquiring, rehabilitating, or constructing affordable
housing, which may include new units of affordable
housing within an existing structure or facilities providing
supportive housing services. In addition to investing in
traditional subsidized housing projects, this authority could
potentially be used to provide for land acquisition, down
payment assistance, and home repair so long as recipients
meet the income guidelines.
3. Funding the operations and maintenance costs of new units
of affordable or supportive housing.
4. For cities with a population under 100,000, the funds can
also be used for rental assistance to tenants.
In the 2019 legislative session, the state approved a
local revenue sharing program for local governments
by providing up to a 0.0146% local sales and use
tax credited against the state sales tax for housing
investments, available in increments of 0.0073%,
depending on the imposition of other local taxes and
whether your county also takes advantage. The tax
credit is in place for up to 20 years and can be used for
acquiring, rehabilitating, or constructing affordable
housing; operations and maintenance of new affordable
or supportive housing facilities; and, for smaller cities,
rental assistance. The funding must be spent on projects
that serve persons whose income is at or below sixty
percent of the area median income. Cities can also issue
bonds to finance the authorized projects.
This local sales tax authority is a credit against the state
sales tax, so it does not increase the sales tax for the
consumer. There are tight timelines that must be met to
access this funding source – the first is January 31, 2020
to pass a resolution of intent. The tax ordinance must
then be adopted by July 27, 2020 to qualify for a credit.
The following information is intended to assist your city
in evaluating its options and timelines. It is not intended
as legal advice. Check with your city’s legal counsel and/
or bond counsel for specific questions on project uses
and deadlines for implementation.
2019
Implementing HB 1406but, importantly, only after voter approval. This sales tax levy
is considered a “qualifying local tax” under HB 1406. Another
important distinction is that the affordable housing sales tax
from 2015 is an additional tax on the consumer, and not a
credit on an existing state-imposed tax.
2. Do we have to levy a “qualifying local tax” to
participate? No. Your city is still eligible to participate in the
program, but your tax credit rate will depend on whether
the county participates in the program. See Tax credit rate
examples chart to the left.
3. Do we only have access to the program if the county
declines to participate? No. A city can participate, and
receive funds, even if the county participates. Unfortunately,
if your city does not impose a “qualifying local tax” by the
deadline and your county declines to participate, then you
will not have access to funds after the first year, due to a
drafting error in the bill. We don’t anticipate this scenario
to occur, but please let us know if you find yourself in that
situation. We will work with the Legislature to address it if this
proves problematic. In all cases you must meet the program
deadlines to participate. See Deadlines to participate.
4. Does it make a difference at all if our county
participates? Only if you have not adopted a “qualifying
local tax.” If you have adopted a “qualifying local tax” you
can access the higher credit rate regardless of county
participation. If you don’t have a “qualifying local tax” then
you can only access the higher rate if the county does not
participate.
5. How is “rental assistance” defined? Does that include
rent vouchers? The term “rental assistance” is not defined
in the chapter 82.14 RCW; however, both federal and
state housing programs use the term “rental assistance” to
mean providing rent, security deposits, or utility payment
assistance to tenants.
6. Can we pool our revenue with another entity? Can
we issue bonds or use the money to repay bonds?
Yes! Cities can enter into an interlocal agreement with
other local governments or a public housing authority
to pool tax receipts, pledge tax collections to bonds,
allocating collected taxes to authorized affordable housing
expenditures, or other agreements authorized under
chapter 39.34 RCW. Cities may also use the tax credit
revenue to issue or repay bonds in order to carry out the
projects authorized under the new law.
7. Is the amount of tax credit we receive limited only by the
amount of sales tax collected per year? No. The maximum
amount will be based on state fiscal year 2019 sales.
8. Does the tax credit program expire? Yes, the tax expires
20 years after the date on which the tax is first levied.
Eligibility to receive shared revenues
• The state is splitting the shared resources between
cities and counties. However, cities can receive both
shares if they have adopted a “qualifying local tax”
by July 31, 2020. Qualifying taxes are detailed below.
Cities who are levying a “qualifying local tax” by July
28, 2019, the effective date of the new law, will receive
both shares immediately once they impose the new
sales tax credit.
• If a city does not implement a qualifying local tax by
the deadline, they can still participate in the program if
they meet the other deadlines but will be eligible for a
lower credit rate.
• A city can adopt the sales tax credit before designating
how the funds will be used once collected.
Qualifying local taxes
The following are considered “qualifying local taxes” and,
if levied, give the city access to both shares of the tax
credit (i.e. 0.0146% rate instead of the single share rate of
0.0073%):
• Affordable housing levy (property tax) under
RCW 84.52.105
• Sales and use tax for housing and related services
under RCW 82.14.530. The city must have adopted at
least half of the authorized maximum rate of 0.001%.
• Sales tax for chemical dependency and mental health
(optional .1 MIDD) under RCW 82.14.460
• Levy (property tax) authorized under RCW 84.55.050, if
used solely for affordable housing
Think of the “qualifying local tax” as a multiplier or
“doubler.” It gives the city access to double the tax credit
even when the county chooses to participate in the
program.
Don’t miss out on up to 20 years of shared
revenue for affordable housing
Deadlines to participate:
• Resolution to levy tax credit: July 28, 2019 – January
31, 2020
• Ordinance to levy the tax credit: By July 27, 2020
• Adopt “qualifying local tax” (optional): By July 31, 2020
Frequently asked questions:
1. This program sounds very familiar. Didn’t a local option,
affordable housing sales tax law pass a few years
ago? Yes, but the new law has important differences. The
Legislature passed HB 2263 in 2015 that authorized cities and
towns to levy up to a 0.1% sales tax for affordable housing—
Additional timelines to keep in mind:
1. Department of Revenue (DOR) requires 30-days-notice of
adoption of sales tax credits. The credit will then take effect
on the first day of the month following the 30-day period.
2. If your city is adopting a “qualifying local tax”, DOR
requires 75-days-notice of adoption of sales tax increases.
Local sales tax increases may only take effect on the first
day of the first, second, or third quarter – not the fourth
(April 1, July 1, or October 1).
3. If your city is adopting a “qualifying local tax” remember
to factor in the ballot measure process into the timeline,
as these must be approved by the voters.
4. If you are intending to bond the revenues for a project
under this authority, check with your legal counsel and
bond counsel about other deadlines that may apply to
your city.Page 16 of 187
Is your city interested in accessing additional
funding to support affordable housing for the next
20 years?
Does your city levy a “qualifying local tax”?
Your tax credit rate is 0.0146%
starting on the date the tax credit
is levied. (See Important Dates.)
1. Affordable housing levy
(RCW 84.52.105)
OR
2. Sales and use tax for housing
and related services (RCW
82.14.530). Must impose at
lease half of the authorized
rate.
OR
3. Sales tax for chemical
dependency and mental health
services or therapeutic courts
(RCW 82.14.460).
OR
4. Levy (property tax) under RCW
84.55.050, if used solely for
affordable housing.
Did your county levy its share of the tax credit?
Unfortunately, your city
is no longer eligible to
participate in the program.
Your city is still
eligible to participate
in the program. Go to
Step 3 to continue.
Can your city adopt a “qualifying local tax”
by July 31, 2020, including ballot measure?
No action required.
Was your city levying the “qualifying local tax”
before you instated the tax credit under HB 1406?
Great! Now let’s find out what your maximum tax
rate is. Did your city instate a “qualifying local tax”
by the deadline – July 31, 2020? A “qualifying local
tax” is not required but can increase your tax credit.
Great! Next, your city must adopt an ordinance by
July 27, 2020 to levy the maximum tax under HB
1406. Did you or will you?
The law requires a resolution of intent to impose
the tax credit. Can your city adopt a resolution
of intent between July 28, 2019 and January 31,
2020?
All of the options for cities over
100,000, plus rental assistance to
tenants.
• Acquiring, rehabing, or constructing affordable
housing. Includes new units within an existing
structure or supportive housing facilities under
RCW 71.24.385. Consider bonding, land acquisition,
direct capital investment down payment assistance,
and rehabilitation of single-family homes owned by
individuals who meet the 60% AMI qualification.
OR
• Funding the operations and maintenance costs of new
units of affordable or supportive housing.
All projects must serve households with incomes at
or below 60% Area Median Income (AMI). Is the city’s
population more than 100,000?
If the county declared they will not levy the tax or have not
adopted a resolution of intent by February 1, 2020, your
city’s tax rate will be 0.0146%. (See Important Dates.)
Until July 1, 2020, your tax credit rate is 0.0073% starting
on the date the tax credit is levied. (See Important
Dates.) After July 1, 2020, your tax credit rate is 0.0146%.
2
6
5
4
3
1
Your tax credit rate is 0.0073% starting on the date
the tax credit is levied. (See Important Dates.)
Important dates:
• Resolution to levy tax credit: July 28, 2019 – January
31, 2020
• Ordinance to levy the tax credit: By July 27, 2020
• Adopt “qualifying local tax” (optional): By July 31, 2020
• See also Additional timelines to keep in mind
on the back
Yes
Yes
Yes No
Yes
Yes No
Yes No
No
Yes
No
No
No
Yes
NoYes
No
Maybe.
What can we spend
the money on?
What’s a “qualifying
local tax”?
Six steps to affordable housing revenue
Page 17 of 187
Carl Schroeder
Government Relations Advocate
carls@awcnet.org
06/20/19
Shannon McClelland
Legislative & Policy Analyst
shannonm@awcnet.org Contact:
Association of Washington Cities • 1076 Franklin St SE, Olympia, WA 98501 • 1.800.562.8981 • wacities.org
Carl Schroeder
Government Relations Advocate
carls@awcnet.org
06/20/19
Shannon McClelland
Legislative & Policy Analyst
shannonm@awcnet.org Contact:
Association of Washington Cities • 1076 Franklin St SE, Olympia, WA 98501 • 1.800.562.8981 • wacities.org
Tax credit rate examples
Max tax
credit rate
under HB
1406
City with
qualifying
local tax
City
without
qualifying
local tax
City doesn’t
levy a tax
credit,
county does
participate
County doesn’t
participate, city
participates but
doesn’t have a
qualifying tax.*
City 0.0146%0.0073%0.0%July 2020: 0.0%
County 0.0%0.0073%0.0146%0.0%
*We believe that this was an error in bill drafting. Please let us know if you are in
this situation. We can work to address it in future legislative sessions.
Eligible uses of the funds:
1. Projects must serve those at or below 60% AMI.
2. Acquiring, rehabilitating, or constructing affordable
housing, which may include new units of affordable
housing within an existing structure or facilities providing
supportive housing services. In addition to investing in
traditional subsidized housing projects, this authority could
potentially be used to provide for land acquisition, down
payment assistance, and home repair so long as recipients
meet the income guidelines.
3. Funding the operations and maintenance costs of new units
of affordable or supportive housing.
4. For cities with a population under 100,000, the funds can
also be used for rental assistance to tenants.
In the 2019 legislative session, the state approved a
local revenue sharing program for local governments
by providing up to a 0.0146% local sales and use
tax credited against the state sales tax for housing
investments, available in increments of 0.0073%,
depending on the imposition of other local taxes and
whether your county also takes advantage. The tax
credit is in place for up to 20 years and can be used for
acquiring, rehabilitating, or constructing affordable
housing; operations and maintenance of new affordable
or supportive housing facilities; and, for smaller cities,
rental assistance. The funding must be spent on projects
that serve persons whose income is at or below sixty
percent of the area median income. Cities can also issue
bonds to finance the authorized projects.
This local sales tax authority is a credit against the state
sales tax, so it does not increase the sales tax for the
consumer. There are tight timelines that must be met to
access this funding source – the first is January 31, 2020
to pass a resolution of intent. The tax ordinance must
then be adopted by July 27, 2020 to qualify for a credit.
The following information is intended to assist your city
in evaluating its options and timelines. It is not intended
as legal advice. Check with your city’s legal counsel and/
or bond counsel for specific questions on project uses
and deadlines for implementation.
2019
Implementing HB 1406but, importantly, only after voter approval. This sales tax levy
is considered a “qualifying local tax” under HB 1406. Another
important distinction is that the affordable housing sales tax
from 2015 is an additional tax on the consumer, and not a
credit on an existing state-imposed tax.
2. Do we have to levy a “qualifying local tax” to
participate? No. Your city is still eligible to participate in the
program, but your tax credit rate will depend on whether
the county participates in the program. See Tax credit rate
examples chart to the left.
3. Do we only have access to the program if the county
declines to participate? No. A city can participate, and
receive funds, even if the county participates. Unfortunately,
if your city does not impose a “qualifying local tax” by the
deadline and your county declines to participate, then you
will not have access to funds after the first year, due to a
drafting error in the bill. We don’t anticipate this scenario
to occur, but please let us know if you find yourself in that
situation. We will work with the Legislature to address it if this
proves problematic. In all cases you must meet the program
deadlines to participate. See Deadlines to participate.
4. Does it make a difference at all if our county
participates? Only if you have not adopted a “qualifying
local tax.” If you have adopted a “qualifying local tax” you
can access the higher credit rate regardless of county
participation. If you don’t have a “qualifying local tax” then
you can only access the higher rate if the county does not
participate.
5. How is “rental assistance” defined? Does that include
rent vouchers? The term “rental assistance” is not defined
in the chapter 82.14 RCW; however, both federal and
state housing programs use the term “rental assistance” to
mean providing rent, security deposits, or utility payment
assistance to tenants.
6. Can we pool our revenue with another entity? Can
we issue bonds or use the money to repay bonds?
Yes! Cities can enter into an interlocal agreement with
other local governments or a public housing authority
to pool tax receipts, pledge tax collections to bonds,
allocating collected taxes to authorized affordable housing
expenditures, or other agreements authorized under
chapter 39.34 RCW. Cities may also use the tax credit
revenue to issue or repay bonds in order to carry out the
projects authorized under the new law.
7. Is the amount of tax credit we receive limited only by the
amount of sales tax collected per year? No. The maximum
amount will be based on state fiscal year 2019 sales.
8. Does the tax credit program expire? Yes, the tax expires
20 years after the date on which the tax is first levied.
Eligibility to receive shared revenues
• The state is splitting the shared resources between
cities and counties. However, cities can receive both
shares if they have adopted a “qualifying local tax”
by July 31, 2020. Qualifying taxes are detailed below.
Cities who are levying a “qualifying local tax” by July
28, 2019, the effective date of the new law, will receive
both shares immediately once they impose the new
sales tax credit.
• If a city does not implement a qualifying local tax by
the deadline, they can still participate in the program if
they meet the other deadlines but will be eligible for a
lower credit rate.
• A city can adopt the sales tax credit before designating
how the funds will be used once collected.
Qualifying local taxes
The following are considered “qualifying local taxes” and,
if levied, give the city access to both shares of the tax
credit (i.e. 0.0146% rate instead of the single share rate of
0.0073%):
• Affordable housing levy (property tax) under
RCW 84.52.105
• Sales and use tax for housing and related services
under RCW 82.14.530. The city must have adopted at
least half of the authorized maximum rate of 0.001%.
• Sales tax for chemical dependency and mental health
(optional .1 MIDD) under RCW 82.14.460
• Levy (property tax) authorized under RCW 84.55.050, if
used solely for affordable housing
Think of the “qualifying local tax” as a multiplier or
“doubler.” It gives the city access to double the tax credit
even when the county chooses to participate in the
program.
Don’t miss out on up to 20 years of shared
revenue for affordable housing
Deadlines to participate:
• Resolution to levy tax credit: July 28, 2019 – January
31, 2020
• Ordinance to levy the tax credit: By July 27, 2020
• Adopt “qualifying local tax” (optional): By July 31, 2020
Frequently asked questions:
1. This program sounds very familiar. Didn’t a local option,
affordable housing sales tax law pass a few years
ago? Yes, but the new law has important differences. The
Legislature passed HB 2263 in 2015 that authorized cities and
towns to levy up to a 0.1% sales tax for affordable housing—
Additional timelines to keep in mind:
1. Department of Revenue (DOR) requires 30-days-notice of
adoption of sales tax credits. The credit will then take effect
on the first day of the month following the 30-day period.
2. If your city is adopting a “qualifying local tax”, DOR
requires 75-days-notice of adoption of sales tax increases.
Local sales tax increases may only take effect on the first
day of the first, second, or third quarter – not the fourth
(April 1, July 1, or October 1).
3. If your city is adopting a “qualifying local tax” remember
to factor in the ballot measure process into the timeline,
as these must be approved by the voters.
4. If you are intending to bond the revenues for a project
under this authority, check with your legal counsel and
bond counsel about other deadlines that may apply to
your city.Page 18 of 187
Published on Jun 14, 2019
Newly passed affordable housing bills require city action on tight timelines
Contact: Carl Schroeder, Shannon McClelland
Two major housing-related bills that passed the 2019 Legislature promise significant benefits,
but only if your city acts within strict timelines.
Don’t miss out on twenty years of revenue from the state to support city housing needs
In HB 1406, the state approved a revenue sharing program for local governments. The
program provides up to 0.0146% in local sales and use tax credited against the state sales tax
for housing investments. The tax credit is available in increments of 0.0073%, depending on
the imposition of other local taxes and whether your county also takes advantage of the credit.
The tax credit is in place for up to 20 years and can be used for acquiring, rehabilitating or
constructing affordable housing; operations and maintenance of new affordable or supportive
housing facilities; and, for smaller cities, rental assistance. The funding must be spent on
projects that serve persons whose income is at or below sixty percent of the area median
income. Cities can also issue bonds to finance the authorized projects.
This local sales tax authority is a credit against the state sales tax, so it does not increase the
sales tax for the consumer. There are tight timelines that must be met to access this
funding source – the first is January 31, 2020 to pass a resolution of intent. The tax
ordinance must then be adopted by July 27, 2020 to qualify for a credit.
There are tight timelines that must be met to access this funding source – the first is
January 31, 2020 to pass a resolution of intent. The tax ordinance must then be adopted
by July 27, 2020 to qualify for a credit.
Pacifica Law Group has helpfully provided a sample resolution of intent you can use to take
the first step of this process. Please make plans to adopt a resolution of intent before the
January 31 deadline, preserving your opportunity to access these new resources for housing in
your city.
AWC will be providing additional educational materials and guidance throughout the rest of the
year, starting at the AWC Annual Conference in Spokane at the end of this month. Stay tuned!
Time-limited opportunity for financial support to develop local housing action plans and
adopt ordinances to increase residential capacity
HB 1923 was the result of a long series of conversations about what it would take to help cities
better accommodate coming growth while providing a greater variety of housing types. The
legislation provides an opportunity for cities to receive grants from the Department of
Commerce to develop and adopt ordinances to increase residential capacity by taking certain
defined actions – but only if action is taken under strict timelines. These actions, if adopted by
April 1, 2021 are not subject to legal appeal under the State Environmental Policy Act (SEPA)
or the Growth Management Act (GMA). Cities will still need to go through existing review
processes and timelines, including securing and considering public input. But once a city
Page 19 of 187
balances those considerations and formally decides on a course of action, it would be final and
not subject to legal appeal under SEPA or GMA.
The following specific actions qualify under this bill (note that these are summaries and there
are important nuances to qualifying ordinances under these topics):
Authorize development capacity of at least fifty units per acre near commuter or light rail
stations.
Authorize development capacity of at least twenty-five units per acre near high
frequency bus stops.
Authorize a duplex, triplex or courtyard apartment on all parcels in a zoning district that
allows single family homes.
Authorize cluster zoning or lot size averaging in all zoning districts that allow single
family homes.
Authorize accessory dwelling units (ADUs) with specific policy provisions.
Adopt a SEPA subarea plan that leverages transit infrastructure or regional centers.
Adopt a SEPA planned action that includes residential or mixed-use development.
Utilize the SEPA infill authority to increase categorical exemption thresholds for
residential or mixed-use development in areas not meeting planned density.
Adopt form-based codes.
Authorize a duplex on all corner lots in single-family zones.
Adopt optional maximum thresholds under the short subdivision process.
Authorize a minimum net density of six dwelling units per acre.
The grant amount for cities with a population more than twenty thousand who intend to adopt
two of the actions from this list is a $100,000—with an opportunity to apply for more than that
amount if they can demonstrate extraordinary potential to increase housing supply or
regulatory streamlining.
Cities that want to develop their own approaches to address housing challenges or supplement
the actions listed above are also eligible to receive funding of $100,000 for a local housing
action plan. That housing action plan must:
Quantify existing projected housing needs for all income levels, with documentation.
Develop strategies to increase the supply of housing needed by those income levels.
Analyze population and employment trends.
Consider strategies to minimize displacement of low-income residents resulting from
redevelopment.
Review and evaluate the current GMA housing element.
Provide for participation and input from a variety of stakeholders.
Include a schedule of programs and actions for implementation of the action plan.
Again, to qualify for these incentives, cities need to act by April 1, 2021. We encourage you
to take advantage of this opportunity and will be providing more educational materials
throughout the year to support your efforts.
Page 20 of 187
AGENDA REPORT
FOR: City Council September 11, 2019
TO: Dave Zabell, City Manager Workshop Meeting: 9/23/19
FROM: Steve Worley, Public Works Director
Public Works
SUBJECT: 2019 Annual Street Preservation Program
I. REFERENCE(S):
Powerpoint Presentation
II. ACTION REQUESTED OF COUNCIL / STAFF RECOMMENDATIONS:
Discussion
III. FISCAL IMPACT:
None
IV. HISTORY AND FACTS BRIEF:
As part of the City of Pasco’s Annual Pavement Preservation Program there were
several projects completed in 2019 both by outside contract and by the Public Works
Department.
20th Avenue Grind and Overlay Project from Court Street north to Interstate 182 was
an extensive project within a high traffic corridor involving multiple construction
elements, this work was completed by outside contract.
Several resurfacing and heavy maintenance projects that were completed on local
streets by the City of Pasco Public Works Operations crews were as follows:
North Hugo Avenue (East Highland Street to East Parkview Boulevard)
North Sycamore Avenue (East Highland Street to East Parkview Boulevard)
North Waldemar Avenue (East Highland Street to East Parkview Boulevard)
East Clark Street (North Main Street Avenue to North Oregon Avenue)
East Bonneville Street (North Main Street to North Oregon Avenue)
North Main Street (East Clark Street to East Bonneville Street)
South 13th Avenue (West Ainsworth Street to West A Street)
Page 21 of 187
South 12th Avenue (West Washington Street to West Ainsworth Street)
North 18th Drive (West Pearl Street to West Ella Street)
Also included were preparatory efforts for the 2020 pavement preservation program
on:
Maple Drive (West of Road 100)
Sacajawea Park Road (East Ainsworth to Highway 12)
West Sunset Trail (East of Road 92)
V. DISCUSSION:
The pavement preservation and maintenance improvements were made to preserve and
extend the life of City streets, and to avoid more costly repairs and/or complete
reconstruction of these streets while providing a smooth and safe street surface free
from potholes and other obstructions for numerous homes and businesses.
The Public Works department conducted a pilot program in 2018 using City forces to
rehabilitate East Circle B, this effort was a success. The program was expanded in
2019 to become a regular part of the City's pavement preservation efforts, with a focus
on non-arterial streets; primarily residential streets and those side streets within
business districts which don't often receive the priority arterial streets receive. The use
of City crews for this work allows overlay dollars to stretch further and expands the
capabilities of the workforce. Residents and small business owners in these project
areas appreciate the improvement in the condition of their streets and the crews gain a
greater sense of accomplishment, connection and ownership in the City they work hard
to maintain.
Page 22 of 187
Pasco City Council Worshop
September 23, 2019
Page 23 of 187
2019 Annual Pavement Preservation
Program
20th Avenue (Court Street to Interstate 182)
•1410 Tons of HMA CL ½” PG64-28 at 2” Depth
•Project Total $390,000Page 24 of 187
2019 Pavement Preservation
Residential Efforts completed by
PW Operations Crew
•2,100 ton of asphalt
•140,000 sq. ft.
•3,028 labor hours
•Approx. $1M in pavement
maintenance value to the City
Page 25 of 187
Hugo
2019 Pavement Preservation
Page 26 of 187
Waldemar
2019 Pavement Preservation
Page 27 of 187
Sycamore
2019 Pavement Preservation
Page 28 of 187
18th & Pearl
2019 Pavement Preservation
Page 29 of 187
Bonneville
2019 Pavement Preservation
Page 30 of 187
Clark
2019 Pavement Preservation
Page 31 of 187
13th Ave
2019 Pavement Preservation
Page 32 of 187
2019 Pavement Preservation
Page 33 of 187
AGENDA REPORT
FOR: City Council June 25, 2019
TO: Dave Zabell, City Manager Workshop Meeting: 9/23/19
FROM: Dan Ford, City Engineer
Public Works
SUBJECT: Design and Construction Standards and Specifications for Public Works
Improvements
I. REFERENCE(S):
Adoption Ordinance
Presentation
Workshop Comments and Responses
Design and Construction Standards and Specifications for Public Works Improvements
II. ACTION REQUESTED OF COUNCIL / STAFF RECOMMENDATIONS:
Discussion
III. FISCAL IMPACT:
None.
IV. HISTORY AND FACTS BRIEF:
The purpose of this document is to combine, for the first time, many of the resources
and authority necessary to complete development related public works projects within
the City of Pasco.
Although the City utilizes the Pasco Municipal Code (PMC) and adopts documents
such as the Standard Specifications for Road, Bridge, and Municipal Construction
(Standard Specifications) prepared by the Washington State Department of
Transportation (WSDOT) and the American Public Works Association (APWA), these
documents as well as the standard details represent just a few of the resources the
development community and City staff must traverse in designing, reviewing, and
approving projects in the City of Pasco.
With the creation of this document, there was also the opportunity to address several
deficiencies identified by local developers and staff. A public workshop was held on
Page 34 of 187
August 5th for contractors, developers and engineering consultants to allow for
additional comments and input. The results of that workshop with responses can be
found at: http://www.pasco-wa.gov/409/City-Standards-Specifications.
The presentation has been formatted to address the high points by chapter.
V. DISCUSSION:
Per PMC 14.10 the Council adopted the Standard Specifications for Road, Bridge, and
Municipal Construction published by Washington State Department of Transportation
to govern all construction, modification, extension or improvement affecting directly or
indirectly any City utility or street infrastructure elements.
Further, the City Engineer recommends that several of the additional resources be
combined into this Design and Construction Standards and Speci fications for Public
Works Improvements document to create a more comprehensive and concise resource
for the development community and City staff.
It is important to note that this document is intended to be a working document that can
and will be modified as it becomes necessary. This document is the result of a
collaboration between staff and the development community to proactively address
issues we have experienced and to improve the development process for all involved.
This item was discussed at the June 24th, 2019, Council Workshop meeting and has
addressed the comments made at that time. Staff recommends adoption of the proposed
standards and specifications by ordinance.
Page 35 of 187
Ordinance – Adopting Revised 2019 Design and Construction
Standards and Specifications for Public Works Improvements - 1
ORDINANCE NO. ______
AN ORDINANCE of the City of Pasco, Washington,
Adopting Design and Construction Standards and
Specifications for Public Works Improvements
WHEREAS, the City of Pasco has completed an extensive update of the City’s July 2015
Design and Construction Standards to be more consistent with industry standards and current
practices; and
WHEREAS, the City desires to have uniform standards, specifications, and construction
details for public infrastructure to be owned and maintained by the City; and
WHEREAS, the “Design and Construction Standards and Specifications for Public Works
Improvements” apply to the design and construction of all public works infrastructure; and
WHEREAS, the Design and Construction Standards and Specifications for Public Works
Improvements will be effective immediately upon the effective date of this Ordinance, and will
apply to all new development and redevelopment subject to City requirements; and
WHEREAS, technical revisions and corrections may be updated by the City of Pasco’s
appropriate departments, as needed, for consistency with industry standards; and
WHEREAS, modifications will be tracked, and a current version of the Design and
Construction Standards and Specifications for Public Works Improvements will be filed with the
City Clerk’s office and posted on the City’s website. NOW, THEREFORE,
THE CITY COUNCIL OF THE CITY OF PASCO, WASHINGTON, DO ORDAIN
AS FOLLOWS:
Section 1. In accordance with state law, to protect and preserve the public health,
safety, and general welfare, consistent with Pasco Municipal Code (PMC) 14.10.010, the “Design
and Construction Standards and Specifications for Public Works Improvements” as set forth on
the document attached hereto, marked as Exhibit “A” and incorporated herein by reference, are
hereby adopted, and to become effective consistent with the adoption and effective date of this
Ordinance.
Section 2. The Design and Construction Standards and Specifications for Public
Works Improvements shall apply to the design and construction of all public works infrastructure.
Section 3. The Public Works Director and/or the City Engineer is/are authorized to
make revisions to these Standards as appropriate to meet the needs and intentions of such
standards.
Page 36 of 187
Ordinance – Adopting Revised 2019 Design and Construction
Standards and Specifications for Public Works Improvements - 2
Section 4. The Design and Construction Standards and Specifications for Public
Works Improvements as promulgated by the Public Works Director and/or the City Engineer shall
be maintained on file with the City Clerk, and posted on the City’s website, and shall be effective
upon filing with the City Clerk.
Section 5. All laws, regulations, and design standards, or parts thereof in conflict or
inconsistent with the standards adopted by this Ordinance, unless superseded by statutory
authority, are hereby repealed.
Section 6. This Ordinance shall take full force and effect five (5) days after its
approval, passage and publication as required by law.
PASSED by the City Council of the City of Pasco, Washington, and approved as provided
by law this ____ day of _________________, 2019.
__________________________________
Matt Watkins, Mayor
ATTEST: APPROVED AS TO FORM:
__________________________________ __________________________________
Debby Barham, City Clerk Kerr Ferguson Law PLLC, City Attorney
Page 37 of 187
Pasco City Council Workshop
September 23, 2019
Page 38 of 187
Design and Construction Standards and Specifications for
Public Works Improvements
PURPOSE:
1.To compile all resources and standards into one document.
2.To provide consistent requirements for all public works improvements, creating a cohesive
document for all parties involved.
3.To address current and historical comments by City Staff and the development community
within this comprehensive update.
4.To have as a resource for both the City and the development community, resulting in
consistency and transparency.Page 39 of 187
Public Comments and Workshops
Request for Written Public Comments –January 10, 2019
◦Contractors
◦Developers
◦Engineering Consultants
City Council Workshop –June 24, 2019
Public Workshop –August 5, 2019 –9:00am –12:00pm
◦Contractors
◦Developers
◦Engineering Consultants
◦City Staff
Page 40 of 187
Public Workshop –August 5, 2019
Open forum, engaging dialogue
Comment intake and comment response
Address restrictive elements
•Warranty
•Easement widths
•Stormwater design
Updated Design and Construction Standards
Document, published September 6, 2019
including Comment Response Log
found here: http://www.pasco-wa.gov/409/City-Standards-Specifications Comment Response Log
44 Comments, 38 updatesPage 41 of 187
Key Revisions of the Design and Construction Standards Document:
Chapter 1 -General:
Key Public Comment Revisions
•Transfer of Ownership/Warranty, revised from 2 years to 1 year.
•Potable and Irrigation water easement widths reduced from 20 to 15 feet.
Key Updates
•Utility Oversizing –Reimbursement by City.
Chapter 2 –Development Procedure:
Key Public Comment Revisions
•Added 30-day review duration for civil plan submittals.
•Clarified as-built drawing requirements when developers bond public improvements.
Key Updates
•Chapter explains development approval process, start to finish.Page 42 of 187
Key Revisions of the Design and Construction Standards Document:
Chapter 3 –General Plan Requirements:
Key Public Comment Revisions
•Included outside utility contact information added for communication ease by developers.
Key Updates
•List of plan requirements for each public improvement type.
Chapter 4 –General Requirements for All Projects:
Key Updates
•Definitions and terms.
•Record drawings.Page 43 of 187
Key Revisions of the Design and Construction Standards Document: (Cont.)
Chapter 5 –Water System Improvements:
Key Public Comment Revisions
•Potable and Irrigation water easement widths decreased from 20 to 15 feet.
•Simplified trench compaction requirements by stating end results, eliminating means and methods.
•Mechanical restraints are an acceptable alternative to concrete thrust blocks.
Key Updates
•Consistency with Washington State Department of Health Water System Design Manual.
•Pressure Reducing Valve (PRV) Stations design guidance.
•Valve and hydrant spacing.
•Potable and non-potable pipe separation standards.Page 44 of 187
Key Revisions of the Design and Construction Standards Document: (Cont.)
Chapter 6 –Sanitary Sewer System Improvements:
Key Public Comment Revisions
•When sewer main termination locations are within 150 feet of last manhole, allow cleanouts in lieu of manhole.
•Allow two precast manhole types, improves supplier reliability and pricing.
•Deflection testing of pipelines not required, unless video inspection results identify ovality concerns.
Key Updates
•Consistency with Department of Ecology Criteria for Sewage Works Design (Orange Book).
•Manhole spacing.
•Force main and lift station design guidance.Page 45 of 187
Key Revisions of the Design and Construction Standards Document: (Cont.)
Chapter 7 –Stormwater Improvements:
Key Updates
•Consistency with Department of Ecology 2019 Stormwater Management Manual for Eastern Washington.
•Specified 25-year design storm in lieu of 100-year storm specified verbally by Ecology.
•Increase allowable infiltration rate from 2.4 inches/hour to 9 inches/hour.
•UIC well registration by applicant, transferred to City upon public improvements acceptance.
•Minimum pipe size and catch basin spacing.Page 46 of 187
Key Revisions of the Design and Construction Standards Document: (Cont.)
Chapter 8 –Street Improvements:
Key Public Comment Revisions
•Asphalt section updates including allowing previously approved WSDOT mix designs for developer use.
•Weather limitations for paving revised to allow paving during 15+ mph winds pending ambient and surface temperatures.
•Compaction testing requirements updated to simplify testing frequencies.
•Replaced mountable (rolled) curb with depressed (Type D) curb at cul-de-sacs for vehicle transition ease including fire trucks.
Key Updates
•Consistency with Manual on Uniform Traffic Control Devices (MUTCD).
•Traffic Impact Analysis triggers and guidance.
•Sight distance triangle to define clearview areas.
•Landscape plan provisions administered by the Administrative & Community Services Department.Page 47 of 187
Key Revisions of the Design and Construction Standards Document: (Cont.)
Standard Details:
Key Public Comment Revisions
•SS-3 updated to include CDF backfill from base elbow to cleanout, simpler but effective solution.
•SS-3, SS-4, SS-8, W-4 casting adjustments were revised for consistent asphalt depths.
•SS-7 doghouse detail replaced to allow improved constructability.
•ST-3 revised asphalt pavement repair detail to require only one aggregate type, simplifies installation.
Key Updates
•SD replaced catch basin types with WSDOT standards (Type 1, Type 2), multiple suppliers, readily available.
•ST-2 street sections were refined and include lane widths.
•ST-5 driveway approaches revised to meet ADA standards.
•ST-7 cul-de-sac revised to meet International Fire Code standards.
•W-2 combined water service components into one detail.Page 48 of 187
Questions?Page 49 of 187
July 2019
Page No.Comment By Comment Comment Response
Sep 2019
Page No.
1‐2 Steve Bauman Two year warranty is excessive. The warranty (Transfer of Ownership) was revised
to one year.
1‐2, 4‐3
1‐2 Steve Bauman 20' easement width is excessive, should not exceed
10 feet.
Easement widths are necessary for access,
equipment, and operations. Potable water and
irrigation easement widths were reduced to a
minimum of 15 feet.
1‐2, 5‐2
1‐3 Steve Bauman Will utility oversizing include labor in addition to
material cost difference?
Not at this time. NO CHANGE. 1‐3
2‐2 Steve Bauman How many days after plan submittal will comments
be sent to developer?
Added code reference PMC 21.35.010. Though, the
PMC does not specify a duration between plan
intake and review comments, the standard is 30
business days, which was added to the Plan Review
section on page 2‐2.
2‐2
2‐4, 4‐5 Brian Thoreson As‐built drawing timelines are difficult to
understand. Re‐word and and add code reference.
Added code reference and updated Section 1‐
05.3(1).
2‐4, 4‐5
3‐1 Steve Bauman It is going to be very difficult to obtain approvals
from all utilities listed on every project.
Contact information for each outside utility was
added.
3‐1
4‐6 Steve Bauman Bullet 3 penalizes contractors as they would like to
request a final walkthrough, and have no control
over the Engineer's production of record drawings.
The best record drawing information lies with the
contractor and this provision requires the
contractor's involvement in the record drawing
submittal process. If a walkthrough is completed,
contractors are typically onto the next project
without influence on record drawings. NO CHANGE.
4‐6
4‐9 Brian Preszler Irrigation water should be allowed for construction
water, rather than requiring potable water.
Potable water will remain the only option for
construction water due to accounting difficulties
and separate meter requirements associated with
irrigation water. NO CHANGE.
4‐9
4‐17 Steve Bauman Who is paid fee for extended closure duration? The payment will be to the City of Pasco. 4‐16
4‐19, 5‐15 Steve Bauman Why 6" wide marking tape? 2" is standard The marking tape specification was updated to 3"
for improved visibility.
4‐19, 5‐15
4‐19, 4‐20 Steve Bauman Trench backfill requirements for select backfill
should be specified and not include the term "may".
This is a case by case, site by site basis and
suitability of soils is field dependent. An alternative
would be requiring a geotechnical report to
determine adequacy of soils for trench backfill. NO
CHANGE.
4‐18, 4‐20
4‐18, 4‐20,
8‐16
Steve Bauman Consider using crushed surfacing top course on all
pipe zone bedding and select backfill rather than
crushed surfacing base course.
This section was updated to require crushed
surfacing top course for all bedding and allow
crushed surfacing top course or crushed surfacing
base course for select backfill.
4‐18, 4‐20,
8‐22
5‐2 Steve Bauman 20' wide easement "free" of any other utilities
should be changed to no parallel utilities.
This paragraph was updated for parallel utilities. 5‐2
5‐4 Steve Bauman Clarify PRV sump pump requirements. The bullet regarding vault drainage was updated for
clarification.
5‐4
5‐6 Steve Bauman Why limited to 6‐inches in depth on backfill?
Provide compaction requirements and let
contractor decide means and methods.
Updated fourth paragraph of Section 7‐09.3(11) to
remove 6" max lift requirement.
5‐6
Comment Response Form ‐ Published September 6, 2019
City of Pasco
Design and Construction Standards and Specifications for Public Works Improvements (July 2019)
Design and Construction Standards Public Workshop
August 5, 2019
Page 50 of 187
July 2019
Page No.Comment By Comment Comment Response
Sep 2019
Page No.
Comment Response Form ‐ Published September 6, 2019
5‐6, ST‐3 Brian Preszler Sawcutting limits are inconsistent; Page 5‐6 states
6", ST‐3 detail states 1.5' and 1'.
The 6" reference on Page 5‐6 is for trench
undermining and is independent of the standard
details. NO CHANGE. The 1.5' and 1' references on
standard detail ST‐3 are for trenches with boxes and
laying back the sides, respectively. Widths were
revised to 1.5' on both trench types.
ST‐3
5‐8 Steve Bauman Why have a blow‐off and a hydrant on a dead end
line?
Section 7‐09.3(22) was updated to require a blow‐
off, unless there is a hydrant connection within the
last 30 feet of the water main.
5‐8
5‐8 Steve Bauman Why the 1,500 feet and 1,000 feet testing
requirements?
This requirement is verbatim, from the WSDOT
Standard Specifications.
5‐8
5‐8 Steve Bauman The pressure gauge certification requirement is
expensive (updwards of $300 to certify) and
unnecessary, as standard pressure gauges should be
adequate.
The gauge certification requirements were replaced
with good working condition with a zero pressure
reading prior to use. Erroroneous or damaged
gauges may be rejected at the discretion of the
Engineer.
5‐8
5‐8 Steve Bauman Consider allowing mechanical restraints in lieu of
concrete thrust blocks.
Section 7‐09.3(21) was updated to allow mechanical
restraints with reference to restraint calculators.
3‐3, 5‐7, W‐
8
5‐10 Steve Bauman The City should allow multiple manufacturers of
valve boxes that are comparable to the Olympic
Foundry 931.
Lids are not all compatible with valve cans. The City
has experienced ongoing issues with lids of other
models dislodging from the valve can. Additionally,
the City would need to maintain an inventory of
multiple models. NO CHANGE.
5‐10
5‐10 Brian Preszler Delete reference to rotating lid depressions in line
with water main, not applicable with Olympic
Foundry 931 lid.
Updated fifth paragraph of Section 7‐12.3 to
eliminate this requirement.
5‐10
5‐12, W‐10 Steve Bauman Consider eliminating thrust blocks and requiring
mechanical restraints on all new hydrants.
All new hydrants will require mechanical restraints
from the main to the hydrant. The concrete thrust
block at the water main connection will remain, to
avoid potential restraints at joints along the water
main.
5‐11, W‐10
5‐12 Steve Bauman Corporation stops only allow test pressures up to 80
and 100 psi, while hydrostatic testing is required to
150 psi.
Corporation stops and meter angle valves were
revised to ball valve style allowing pressure beyond
the 150 psi test pressure.
5‐12
5‐14, 8‐15 Steve Bauman Replace rebar marking requirement with 2x4 metal
stud. Steve recommended use of fiberglass
markers.
Stub marker requirements were updated to include
a 2x4 metal stud on the standard drawings,
referenced in special provisions. Fiberglass markers
can be proposed in plans for City consideration, not
a current standard.
5‐14, 6‐6, 8‐
21, SS‐6, W‐
2, W‐3
6‐3 Brian Preszler Two manhole types should be allowed; tongue and
groove, and confined groove.
This section was updated to allow both manhole
and gasket types, including detail updates.
6‐3, SS‐1
6‐3, SS‐3, SS‐
4
Steve Bauman The valve, manhole, cleanout, etc. adjustments
should all be 2.5" depth.
The pavement depth was revised to 2.5" at all
casting adjustment locations within details,
references were made to details in the special
provisions.
6‐3, 7‐10, SS‐
3, SS‐4, SS‐
8, W‐4
6‐4 Brian Preszler What material is required for sewer pipe over 12
feet?
Section 7‐17 was updated to include SDR 26 for all
sewer pipe installations over 12 feet deep.
6‐4
6‐5 Brian Preszler Why pull a mandrel and video inspection? Video inspections do not always show ovality issues.
The section was updated for mandrels to be pulled
at the discretion of the City Engineer following
video inspection review.
6‐6
8‐6 Doug Migas Specifications don't specify RAP requirements,
clarify.
Section 5‐04 was replaced with WSDOT APWA
special provisions. See Section 5‐04.2.
8‐6
Page 51 of 187
July 2019
Page No.Comment By Comment Comment Response
Sep 2019
Page No.
Comment Response Form ‐ Published September 6, 2019
8‐7 Doug Migas If mix design was previously approved by WSDOT,
but not currently on the QPL, is this acceptable?
Section 5‐04.2 was updated to accept previously
approved WSDOT mix designs. See Section 5‐
04.2(2) Mix Design ‐ Obtaining Project Approval.
8‐8
8‐8 Doug Migas Update binder reference. The binder reference was updated to PG 64S‐28.
See Section 5‐04.2.
8‐7, ST‐2A,
ST‐2B, ST‐
2C, ST‐3, ST‐
7
8‐9 Doug Migas Inconsistent compaction testing requirements. Updated compaction requirements to two tests for
first 100 tons and one test for every 100 tons
thereafter, per day.
4‐11, 8‐13
8‐10 Doug Migas Weather limitations are unreasonable for not being
able to pave when wind speeds are over 15 mph.
Revised Section 5‐04.3(1) to allow paving when
wind speeds are 15+ with higher ambient and
surface temperatures.
8‐9
SD‐1 Brian Preszler Why Type 1 rectangular catch basins? WSDOT standard, majority municipal standard, and
readily available by majority of precast businesses.
Compaction is improved around straight edges, less
settling. Catch basins are set square to gutter/curb
lines. NO CHANGE.
SD‐1
SD‐3 Steve Bauman What are UIC treatment soils? Treatment requirements will be specified on the
plans, as determined by the Developer's Engineer
for approval consideration by the City. NO CHANGE.
SD‐3
SS‐3 Brian Preszler Concrete base should be replaced with CDF. The backfill around the drop manhole was updated
to CDF from the base elbow up to the sewer
cleanout.
SS‐3
SS‐6 Brian Preszler Consistent with 5‐15 comment, replace rebar with
2x4 metal stud, extend tracer tape to end cap,
extend tracer wire around lateral to 2x4 metal stud.
Detail was updated accordingly. SS‐6
SS‐7 Brian Preszler Doghouse manhole will be very difficult to construct
as presented. Recommends cast‐in‐place base up
beyond pipe, then precast sections above those.
Detail was replaced. SS‐7
SS‐8 Brian Preszler Surfacing depth should be consistent, cleanouts
allowed when? and eliminate fiber packing to drain.
Detail was updated accordingly, and cleanout
provisions were added to page 6‐1.
SS‐8, 6‐1
ST‐3 Steve Bauman Would prefer crushed surfacing base course full
depth rather than adding top course on trench
patches.
Detail was updated accordingly. ST‐3
W‐5 Steve Bauman Is thrust block necessary? Add welded nut to top of
2" galvanized cap for assisting with removal if
rusted.
Brian Preszler echoed the City's need for a thrust
block on this detail. The detail was updated to add
a 1" nut welded to the top of the 2" cap.
W‐5
W‐7 Steve Bauman What are 2' and 3' dimensions to? Detail was updated for clarification. W‐7
W‐21 Steve Bauman Add U‐post with stainless steel hose clamp to poly
pipe riser, change color to purple, and eliminate
bushings.
Detail was updated accordingly. W‐21
Page 52 of 187
CITY OF PASCO
DESIGN AND CONSTRUCTION
STANDARDS AND SPECIFICATIONS
FOR
PUBLIC WORKS IMPROVEMENTS
September 2019
Page 53 of 187
CITY OF PASCO
DESIGN AND CONSTRUCTION
STANDARDS AND SPECIFICATIONS
FOR
PUBLIC WORKS IMPROVEMENTS
City of Pasco
525 North Third Avenue
Pasco, WA 99301
(509) 545-3444
FAX (509) 543-5728
September 2019
Page 54 of 187
Pasco Design and Construction Standards Index
INDEX
CHAPTER 1 - GENERAL .......................................................................................................... 1-1
1. ENACTING AUTHORITY .......................................................................................... 1-1
2. PURPOSE ................................................................................................................. 1-1
3. STATE ENVIRONMENT POLICY ACT (SEPA) ........................................................ 1-1
4. CONFLICTING PROVISIONS .................................................................................. 1-1
5. SEVERANCE ............................................................................................................ 1-1
6. PROCESS ................................................................................................................. 1-1
7. ENGINEERING DESIGN PLAN REQUIREMENTS .................................................. 1-1
8. REVIEW AND INSPECTION FEE ............................................................................ 1-2
9. RECORD DRAWINGS .............................................................................................. 1-2
10. TRANSFER OF OWNERSHIP ................................................................................ 1-2
11. EASEMENTS .......................................................................................................... 1-2
12. UTILITY OVERSIZING ............................................................................................ 1-3
CHAPTER 2 - DEVELOPMENT PROCEDURE ........................................................................ 2-1
INTRODUCTION ............................................................................................................ 2-1
OWNER RESPONSIBILITY ........................................................................................... 2-2
PLAN REVIEW ............................................................................................................... 2-2
CONSTRUCTION .......................................................................................................... 2-3
CONSTRUCTION COMPLETION.................................................................................. 2-4
CHAPTER 3 - GENERAL PLAN REQUIREMENTS .................................................................. 3-1
GENERAL PLAN FORMAT ........................................................................................... 3-1
WATER SYSTEM PLAN REQUIREMENTS .................................................................. 3-2
SANITARY SEWER SYSTEM PLAN REQUIREMENTS ............................................... 3-3
STORMWATER SYSTEM PLAN REQUIREMENTS ..................................................... 3-4
STREET PLAN REQUIREMENTS ................................................................................. 3-5
CHAPTER 4 - GENERAL REQUIREMENTS FOR ALL PROJECTS ........................................ 4-1
FORWARD ..................................................................................................................... 4-1
GENERAL ...................................................................................................................... 4-1
1-01 DEFINITIONS AND TERMS ...................................................................... 4-2
1-04 SCOPE OF THE WORK ............................................................................ 4-3
1-05 CONTROL OF WORK ................................................................................ 4-4
1-06 CONTROL OF MATERIAL ....................................................................... 4-10
1-08 PROSECUTION AND PROGRESS ......................................................... 4-16
1-10 TEMPORARY TRAFFIC CONTROL ........................................................ 4-17
7-08 GENERAL PIPE INSTALLATION REQUIREMENTS .............................. 4-18
8-01 EROSION CONTROL AND WATER POLLUTION CONTROL ................ 4-20
CHAPTER 5 - WATER SYSTEM IMPROVEMENTS ................................................................. 5-1
GENERAL REQUIREMENTS FOR WATER SYSTEM IMPROVEMENTS .................... 5-1
SPECIAL PROVISIONS FOR WATER SYSTEM IMPROVEMENTS ............................ 5-4
7-09 WATER MAINS .......................................................................................... 5-5
7-12 VALVES FOR WATER MAINS .................................................................. 5-9
7-14 HYDRANTS ............................................................................................. 5-11
7-15 SERVICE CONNECTIONS ...................................................................... 5-12
8-03 IRRIGATION SYSTEMS .......................................................................... 5-14
9-15 IRRIGATION SYSTEMS .......................................................................... 5-15
CHAPTER 6 - SANITARY SEWER SYSTEM IMPROVEMENTS.............................................. 6-1
GENERAL REQUIREMENTS FOR SANITARY SEWER SYSTEM IMPROVEMENTS 6-1
SPECIAL PROVISIONS FOR SANITARY SEWER SYSTEM IMPROVEMENTS ......... 6-2
7-05 MANHOLES, INLETS, CATCH BASINS, AND DRYWELLS ...................... 6-2
7-17 SANITARY SEWERS ................................................................................. 6-4
7-18 SIDE SEWERS .......................................................................................... 6-6
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Pasco Design and Construction Standards Index
7-25 SEWER FORCE MAINS (NEW SECTION) ............................................... 6-7
CHAPTER 7 - STORMWATER IMPROVEMENTS ................................................................... 7-1
GENERAL REQUIREMENTS FOR STORMWATER IMPROVEMENTS ...................... 7-1
DESIGN CRITERIA ............................................................................................ 7-3
DESIGN STORMS ............................................................................................. 7-3
HYDROLOGIC ANALYSIS ................................................................................. 7-4
TREATMENT BMP SIZING ................................................................................ 7-5
FLOW CONTROL .............................................................................................. 7-5
SPECIAL PROVISIONS FOR STORMWATER IMPROVEMENTS ............................... 7-6
7-02 CULVERTS ................................................................................................ 7-6
7-04 STORM SEWERS ...................................................................................... 7-6
7-05 MANHOLES, INLETS, CATCH BASINS, AND DRYWELLS ...................... 7-8
CHAPTER 8 - STREET IMPROVEMENTS ............................................................................... 8-1
GENERAL REQUIREMENTS FOR STREET IMPROVEMENTS .................................. 8-1
TRAFFIC STUDIES ............................................................................................ 8-1
STREET REQUIREMENTS ............................................................................... 8-1
SPECIAL PROVISIONS FOR STREET IMPROVEMENTS ........................................... 8-3
2-01 CLEARING, GRUBBING, AND ROADSIDE CLEANUP ............................ 8-3
2-02 REMOVAL OF STRUCTURES AND OBSTRUCTIONS ............................ 8-4
2-03 ROADWAY EXCAVATION AND EMBANKMENT ...................................... 8-4
2-07 WATERING ................................................................................................ 8-5
2-11 TRIMMING AND CLEANUP....................................................................... 8-6
4-04 BALLAST AND CRUSHED SURFACING .................................................. 8-6
5-04 HOT MIX ASPHALT ................................................................................... 8-6
6-02 CONCRETE STRUCTURES.................................................................... 8-16
8-02 ROADSIDE RESTORATION.................................................................... 8-16
8-04 CURBS, GUTTERS, AND SPILLWAYS ................................................... 8-17
8-06 CEMENT CONCRETE DRIVEWAY ENTRANCES .................................. 8-18
8-13 MONUMENT CASES ............................................................................... 8-18
8-14 CEMENT CONCRETE SIDEWALKS ....................................................... 8-19
8-20 ILLUMINATION, TRAFFIC SIGNAL SYSTEMS, AND ELECTRICAL ...... 8-20
8-21 PERMANENT SIGNING........................................................................... 8-21
8-22 PAVEMENT MARKING ............................................................................ 8-22
9-03 AGGREGATES ........................................................................................ 8-22
APPENDIX A – STANDARD DETAILS INDEX
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Pasco Design and Construction Standards Chapter 1 - General
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CHAPTER 1 - GENERAL
1. ENACTING AUTHORITY
These Design and Construction Standards are enacted by the City of Pasco, in accordance with
state law, to protect and preserve the public health, safety, and general welfare, consistent with
Pasco Municipal Code (PMC) 14.10.010.
2. PURPOSE
The purpose of these Design and Construction Standards is to provide consistent requirements,
standards, and specifications for the design and construction of public works infrastructure
improvements by the City and by private developers.
3. STATE ENVIRONMENT POLICY ACT (SEPA)
These Design and Construction Standards will not affect any considerations involving issues
under the State Environmental Policy Act (SEPA). The City’s responsible official will continue to
make all necessary SEPA decisions when individual proposals are submitted.
4. CONFLICTING PROVISIONS
The standards, procedures, and requirements of these Design and Construction Standards are
the minimum necessary to promote the health, safety, and welfare of the residents of the City of
Pasco. The City may adopt more or less rigorous or different standards, procedures, and
requirements whenever necessary. If the provisions of these Design and Construction Standards
conflict with one another, or if a provision of these Design and Construction Standards conflicts
with the provision of the existing City Code, or a previously enacted Ordinance of the City, the
most restrictive provision or the provision imposing the highest standard shall control.
5. SEVERANCE
If any provision of these Design and Construction Standards or its application to any person or
circumstance is for any reason held to be invalid, the remainder of these Design and Construction
Standards or the application of the provisions is not affected.
6. PROCESS
Any project that includes the construction of public infrastructure or represents an impact to public
infrastructure shall comply with the procedures listed in CHAPTER 2 and PMC. Public
infrastructure includes all construction or impact to public streets, water, sanitary sewer, irrigation,
storm drainage, illumination and any other facilities that will be owned, operated and maintained
by the City. Additionally, all projects shall be reviewed by the City for regulating on-site stormwater
runoff.
7. ENGINEERING DESIGN PLAN REQUIREMENTS
All plans, specifications, engineering calculations, diagrams, details, and other relevant data shall
be designed and prepared by a Civil Engineer licensed by the State of Washington (Consultant),
in accordance with CHAPTER 3.
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8. REVIEW AND INSPECTION FEE
Application, plan review, and inspection fees are hereby established to defray the costs incurred
by the City of Pasco, its agents, employees, and elected or appointed officials, for review and
approval of the plans and specifications and for inspection of construction of the public works
improvements. Fees as presented in the PMC and fee schedule as adopted by ordinance shall
include, but not be limited to, application review, plan review, subsequent meetings with the
Developer, explanations to the Developer’s Consultant, reviews of revised plans, construction
inspection, re-inspections, and a final inspection prior to acceptance of the project.
Fee payments shall be made in full by the Developer prior to the City releasin g the approved
original plans and specifications for construction, or the issuance of a Building Permit as described
in CHAPTER 2.
9. RECORD DRAWINGS
The Developer's Consultant shall prepare and maintain a neatly marked, full-sized print set of
record drawings showing the final location and layout of all new construction of the public facilities.
Record drawings shall be supplied to the City of Pasco consistent with Section 1-05.3(1) Project
Record Drawings as presented in CHAPTER 4 of these Construction Standards.
10. TRANSFER OF OWNERSHIP
The City Engineer or his designee shall make final inspection of all constructed public
improvements at construction completion. Upon final inspection and approval of all work, the City
Engineer shall provide written certification of completed public improvements including the
method of construction, workmanship, materials, and quality control testing of the improvements.
Public improvements shall be deemed accepted by the City one year from the date of certification
and shall be conveyed to the City at that time. The Developer as the owner is responsible for
operation, maintenance, and repairs of the public improvements within the one-year period.
11. EASEMENTS
Public utility easements shall be established for the location of new and future public
improvements serving new land divisions and land developments. Easements shall also be
granted across the front of new lots and existing lots to provide future utility access as required.
All easements required shall be prepared by the Developer on the proper form and format for
recording at the Franklin County Auditor’s Office. The easement legal description shall be
prepared by a land surveyor licensed in the State of Washington. The easement document shall
be submitted to the Planning Division for review prior to plan approval. Once approved by the
City Engineer, the Developer shall record the executed and notarized easement, and provide
proof of recording to the Planning Division prior to project acceptance.
Easements for new and/or future utility lines shall be a minimum of twenty (20) feet wide, with the
exception of potable water and irrigation which shall be a minimum of fifteen (15) feet wide,
provided the width of easements for buried utilities will be at least twice the depth of the planned
excavation. Where utilities share or lie within a single easement, Department of Health separation
requirements shall apply as appropriate, and the easement width shall extend eight (8) feet
beyond the center of pipe, parallel to the utility.
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Pasco Design and Construction Standards Chapter 1 - General
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Utility easements shall be continuous and aligned from block to block within a subdivision and
with easements in adjoining subdivisions to facilitate the extension and future extension of public
utilities.
12. UTILITY OVERSIZING
In all cases, the City Engineer shall have final determination of the size and depth of water, sewer,
and irrigation mains connected to the City utility system. The determination shall be consistent
with the City’s comprehensive plan and/or the long-range objectives for the associated utility.
For example, if a property owner/developer is required to install a water main with a diameter in
excess of the size necessary to serve their development, and greater than the 8” minimum pipe
size required for all utilities, and if the purpose of such oversizing is to provide for the future needs
of the City, the City may, based upon the conditions established within this policy, reimburse the
property owner/developer for the difference in material and/or labor costs incurred solely by
reason of the oversizing requirement. No such reimbursement shall be made except upon the
following:
• Complete installation of the utility main and approval of the same by the City Engineer;
• Submittal to the City of a bill of sale, warranty, bonding, and proof of insurance for the
utility main in accordance with PMC 12.24.110;
• Certification of the oversizing costs, with such verification from the material supplier and
contractor as the City Engineer may require;
• Approval of the oversizing costs by the City Engineer; and
• Approval of the reimbursement by the City Engineer.
As an alternative to cash reimbursement, the City Engineer may choose to provide a credit, in the
amount of the reimbursement that may otherwise be available, against the corresponding
development charges imposed under PMC 3.35 and 12.24. For example, if a water main is
oversized, a credit may be granted against the water development charge imposed under PMC
13.45, but not the sewer development charge. Said reimbursement or credit shall not be more
than 100% of any and all development charges.
The cost of labor and materials for said oversizing may be reimbursed to the owner/developer by
the City. Materials include pipe, imported trench backfill, and asphalt pavement beyond
trench/surfacing limits required for the development. The labor cost to install the utility oversizing
may be considered when the pipe diameter oversize is greater than 250% different in size than
an 8-inch diameter or the pipe diameter required for the development, whichever is greater. For
example, if an 8” main is required for the development, then a pipe that is more than 20” in
diameter, such as a 24” diameter main, would receive consideration of labor within the calculation
for upsize credit as determined by the City Engineer. Said reimbursement or credit shall not be
more than 100% of any and all development charges.
An oversizing agreement must be executed by the City Manager and Developer prior to plan
approval. A summary of all eligible reimbursable costs and backup itemization must be submitted
to the City Engineer, for review and acceptance, within 45 days o f substantial completion of the
project or phase. Following review of submission, a determination of the total reimbursement
amount will be calculated by the City Engineer and provided to the Developer within 45 days of
submission receipt. Upon concurrence of the calculated amount by the Developer, the City will
provide reimbursement payment within 30 days.
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Pasco Design and Construction Standards Chapter 2 – Development Procedure
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CHAPTER 2 - DEVELOPMENT PROCEDURE
INTRODUCTION
Any project that includes the construction of public infrastructure or represents an impact to public
infrastructure shall comply with the following procedures. Public infrastructure includes all
construction or impact to public streets, water, sanitary sewer, irrigation, storm drainage,
illumination and any other facilities that will be owned, operated, and maintained by the City.
Unless otherwise specifically stated, the term “public improvement” or “public infrastructure” shall
mean any improvement constructed within public right-of-way, or one that will be transferred to
the City following construction, including, but not limited to, sanitary sewer, storm drainage, water,
irrigation, roadway, sidewalk, traffic signals, and street lights. The term "City" shall mean the City
Engineer, or his designated representatives; "Developer" shall mean the actual Owner/Developer
of the proposed development that includes public improvements or his designated Agent; and,
"Consultant" shall mean an individual or firm, licensed to practice Civil Engineering in the State of
Washington, who shall have been retained by the Owner/Developer for the purpose of preparing
the detailed plans and specifications and doing such other engineering work as shall be
specifically identified within the context of these procedures and as approved by the City
Engineer.
Improvements for which these procedures shall typically apply include water, sewer, storm, and
street impacts. Examples include:
Water: Public water mains, water systems, irrigation mains, irrigation systems and their
appurtenances. The required procedures for private, on-site water systems from the City
meter to the building, and for private, on-site irrigation systems are addressed through the
Building Division.
Sanitary Sewer: Public sanitary sewer interceptors, trunks, collectors and their
appurtenances including portions of the building sewers located within the public right-of-
way or public easement. The required procedures for private sanitary sewer service
laterals and appurtenances located outside of the public rights-of-way or public easements
are addressed through the Building Division.
Stormwater: Public stormwater and drain systems and their appurtenances located within
the public right-of-way or public easements, and infrastructure for private, on-site
stormwater systems, located outside the public right-of-way. On-site stormwater system
designs will be reviewed by the City to ensure systems meet the required stormwater
regulations.
Street: All public street or roadway facilities and their appurtenances including traffic
signals, street lighting, driveways, sidewalks, curb ramps, curb, gutter, bicycle and
pedestrian facilities, and parking areas. The required procedures for p rivate on-site
sidewalks, private parking and loading facilities, private driveways, and other
improvements are addressed through the Building Division.
Minor improvements, such as residential driveway approaches or isolated sidewalk sections, may
be exempt from these requirements at the discretion of the City Engineer.
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OWNER RESPONSIBILITY
The Owner/Developer shall, if other than himself, name and identify the person who shall be
designated to act on his behalf on matters relating to the project. The Consultant may, at the
Owner/Developer's discretion and direction, be the Agent. The identified person shall be the
single point of contact for the duration of the project.
The Owner/Developer shall retain the services of a Consultant, having the appropriate City of
Pasco business license and licensed to practice Civil Engineering in the State of Washington,
who is qualified to perform the required engineering services to design and construction
stake/survey, as required, of the proposed public improvements. If the project includes installation
of domestic water infrastructure, the Consultant shall comply with the requirements of WAC 246-
290-125.
If, at any time during the project, the Owner/Developer terminates or reduces the level of the
services of the Consultant or the designated Agent as specifically identified and accepted by the
City, the Owner/Developer and Consultant/Agent shall immediately notify the City.
The Owner/Developer has the overall responsibility for project management, construction
management, contract administration, permit acquisition, compliance, testing, and, if required,
right-of-way acquisition. No construction work shall commence prior to a Pre-Construction
Conference and plan approval by the City Engineer.
PLAN REVIEW
The Consultant shall prepare, seal, and submit to the City Planning Division four complete sets
of detailed construction plans, profiles, cross sections, support data, design calculations, project
details, and project specifications as applicable, consistent with PMC 21.35.010. All such plans
and specifications shall be in accordance with the requirements of the most current edition of the
WSDOT Standard Specifications for Road, Bridge, and Municipal Construction, the Manual on
Uniform Traffic Control Devices, the Department of Health Water System Design Manual, the
Department of Ecology Criteria for Sewage Works Design, the Stormwater Management Manual
for Eastern Washington, City of Pasco Standards, and all design of domestic water shall be
compliant with WAC 246-290-200, 220, and 230.
Plans shall be 22”x34” (ANSI D) size for final acceptance. The applicant shall allow a minimum
clear area of 2.5”x2.5” on each plan sheet for final acceptance stamp. The City shall review the
submitted plans and specifications within 30 business days and shall return one reviewed and
noted copy indicating the changes, additions, deletions, or modifications that are required to make
the plans and specifications acceptable. When the revised plans, specifications, and other
materials are resubmitted to the City, the City shall review and upon acceptance, approve the
revised plans and specifications notifying the Consultant of approval and the remainder of the
review and inspection fees to be paid. Review of the revised plans and specifications will be on
a first-come, first-served basis, and a response will be provided to the applicant within 15 business
days. The response will include additional comments or approval notification.
It is the Developer’s responsibility to obtain signatures and dates from all outside utilities within
the City of Pasco indicating that they have reviewed and approved the plans, as required by
CHAPTER 3 of these Construction Standards. The approval from outside utilities must be
received prior to final plan acceptance and plan approval consideration by the City. If significant
changes are required to the plans following the City’s review, after initially receiving outside utility
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approval, the owner may be required to reobtain the signature and date of possible impacted
utilities as designated by the City.
Upon acceptance, the City Engineer will approve and sign the plans. Such approved plans and
specifications shall not be changed, modified, or altered without written authorization from the City
Engineer. The Developer shall provide the City with a minimum of five (5) copies of the approved
plan set and specifications for use by City Inspectors and City Departments as required.
CONSTRUCTION
Following selection of a Contractor and prior to construction, the Developer is responsible for
scheduling a pre-construction conference with the City’s Construction Supervisor. Other
jurisdictions, the Developer’s Engineer, Developer’s contractor, utility companies, subcontractors
and other necessary parties to the project shall be present at the preconstruction conference.
The City shall host the Pre-Construction Conference within two weeks of the scheduling request
by the applicant. The Developer’s contractor will submit his insurance and construction schedule
at this conference. Construction may proceed, per the approved schedule, following the
completion of the Pre-Construction Conference, provided all of the necessary documentation has
been submitted and approved.
It is the responsibility of the Owner/Developer to ensure that construction is in conformance with
the approved plans and specifications. The Owner/Developer is ultimately responsible for the
work that is done. The City shall be notified not less than three working days before construction
is to start.
The City of Pasco will assign a construction inspector to the project at the owner/developer's
expense, the cost of which covered by the plan review/inspection fees. In addition to routine
observation, the City inspector will inspect specific elements and milestones during the work. All
tests, inspections, or reviews to be completed by the City shall be scheduled a minimum of two
working days in advance. The City’s inspection will not relieve the Owner/Developer’s liability of
all work being performed in conformance with the approved plans, specifications, and permits.
The Owner/Developer shall independently hire and cover all costs associated with quality
assurance sampling and materials testing by a certified testing company and provide
documentation of the results of the sampling and testing to the City. The requirements for
sampling and testing are contained in the current edition of the WSDOT Standard Specifications
for Road, Bridge and Municipal Construction, and these City of Pasco Construction Standards.
The Owner/Developer, or his assigned Agent, shall administer, manage, and supervise the
construction and will be readily available to approve design changes, when necessary. The
Contractor shall have a representative with authority on site whenever work is being performed.
Any problems that are encountered or changes required due to construction conditions will be
reviewed with the Consultant and the owner/developer. Changes that require any increase or
decrease to the contractor's cost will be the responsibility of the owner/developer and may result
in increased City review and inspection fees.
All construction shall meet the requirements of the most current edition of the WSDOT S tandard
Specifications for Road, Bridge, and Municipal Construction, the Manual on Uniform Traffic
Control Devices, the Department of Health Water System Design Manual, the Department of
Ecology Criteria for Sewage Works Design, the Stormwater Management Manual for Eastern
Washington, City of Pasco Standards, the approved plans, the approved Project Specifications
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and other applicable regulations. Special Provisions (if any) shall be prepared and submitted to
the City for acceptance. All changes, alterations, or revisions to the approved plans or
specifications shall be submitted for acceptance by the City Engineer.
Copies of all test records shall be furnished to the City Engineer on a weekly basis, or as deemed
necessary by the City Engineer. The City Engineer or designee will visit the project site to review
the work related to the required inspection. Such site visits do not relieve the applicant, or the
contractor of any responsibilities for performing all work in accordance with the approved plans
and this chapter. The City Engineer or designee may also visit the project site from time to time
to monitor the overall progress of the project.
Failure to comply with testing requirements may necessitate appropriate or additional testing and
certification as directed by the City Engineer. Costs of such testing and certification shall be borne
by the contractor and/or applicant. At the time that such action is directed by the City Engineer,
no further work will be permitted on the road or subdivision until all tests have been completed
and all corrections have been made to the satisfaction of the City Engineer.
The City shall have the authority to cause a suspension of construction when, in the City's opinion,
such work is not being done in conformance with the approved plans, specifications, regulations
or permit. Any resultant delays, impacts, or added expenses shall not be the City’s responsibility.
Upon written notice that the public improvements have been substantially completed, the City will,
in the company of the Owner/Developer or his Agent, make a final inspection of the construction.
The Owner/Developer shall see that all necessary additions, corrections, repairs, and/or
modifications are made.
CONSTRUCTION COMPLETION
At the conclusion of construction and when all corrections and repairs have been made, the
Owner/Developer shall submit record drawings together with a Certificate of Work Completion,
which shall include, but not be limited to, testing records, material certifications and wa rranties,
and a request for City Engineer certification of completed public improvements.
No building or service connection to sanitary sewers, storm drains, or water lines will be permitted
until these systems have received certification by the City Engineer, or unless otherwise approved
by the City for connections (including the payment of connection charges).
The completion of all public improvements, including submittal of “As-Built Drawings” shall be
required prior to the issuance of a building permit, however, in certain situations, a building permit
may be granted prior to the completion of the public improvements provided the Owner/Developer
submits a bond for the public improvements, as required by PMC 21.30.050. All public
improvements including “As-Built Drawings” must be completed prior to receiving a Certificate of
Occupancy.
When all public improvements have been completed in an acceptable manner, and following
receipt of a Certificate of Work Completion package, the City Engineer shall provide certification
of completed public improvements. Certification by the City shall not relieve the
Owner/Developer’s, or the Contractor’s liability of all work being performed in conformance with
the approved plans, specifications and permit. Public improvements shall be deemed accepted
by the City within the timeframes set forth within the PMC.
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Pasco Design and Construction Standards Chapter 3 – General Plan Requirements
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CHAPTER 3 - GENERAL PLAN REQUIREMENTS
All plans, details, specifications, engineering calculations, diagrams, and other relevant data shall
be designed and prepared by a Civil Engineer currently licensed by the State of Washington.
GENERAL PLAN FORMAT
1. Plan sheets and profile sheets or combined plan and profile sheets and detail sheets shall
be on a sheet size of 22" x 34" (ANSI D).
2. The Cover sheet shall contain the following:
a. Title of the project;
b. Name, address, and phone number of the owner/developer;
c. Name, address, and phone number and stamp of the Civil Engineer preparing the
plans (Consultant);
d. A minimum clear area of 2.5”x2.5” for final acceptance stamp for City final approval
of the plans;
e. “APPROVED FOR CONSTRUCTION BY OUTSIDE UTILITY” with signature block
for outside utilities listed below:
i. Franklin County Irrigation District
1. John Burns, (509) 727-0168, jburn@pocketinet.com
ii. Franklin County PUD
1. Duane Sams, (509) 546-5969, dsams@franklinpud.com
iii. Cascade Natural Gas
1. Arnie Garza, (509) 736-5563, arnie.garza@cngc.com
iv. South Columbia Irrigation District
1. Eric Dixon, (509) 547-1735, edixon@scbid.org
v. Bonneville Power Administration
1. Deborah Rodgers, (509) 544-4749, dxrodgers@bpa.gov
vi. Charter Communications
1. Dan Catron, (509) 728-2865, dan.catron@charter.com
vii. CenturyLink
1. Tobias Mears, (509) 542-0351, tobias.mears@centurylink.com
viii. Big Bend Electric
1. Mark Hay, (509) 659-1700, mhay@bbec.org
Please note, the approval from outside utilities must be received prior to final plan
acceptance and plan approval consideration by the City. Contacts are subject to change.
The Developer shall be responsible for providing current contact information.
f. Vicinity map showing the project site location;
g. Survey benchmark used for the project;
h. An overall site plan with contours;
i. Sheet Index;
j. Legend;
k. Applicable project information; and
l. The utility locate call # 1-800-424-5555.
3. Each sheet shall contain the following:
a. Project title and City project number, work order number, or LID number, if
appropriate;
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b. Quarter section, Section - Township – Range;
c. Sheet title;
d. Page (of page) numbering;
e. Revision block;
f. Subdivision or short plat name;
g. Signed stamp by a Civil Engineer currently licensed by the State of Washington;
and
h. A minimum clear area of 2.5”x2.5” for final acceptance stamp for City final approval
of the plans.
4. All plan sheets must have a NORTH arrow preferably pointing to the top of the sheet or to
the left and must indicate the drawing scale. All engineering plans must be drawn to an
appropriate engineer's scale. For profiles, the vertical scale shall be 1"=2’, 1"=5’ or 1"=10'.
The horizontal scale shall be the same for both plan and profile and shall normally be 1"
= 20'. Plan and profile stationing shall generally read left to right.
5. Match lines are required at breaks between sheets.
6. The Vertical Datum for all plan submittals must be based on the City of Pasco datum,
NAVD 88. The benchmark used shall be referenced on the plans. An assumed datum
will not be accepted.
7. Existing features and topography within the project construction limits must be shown on
the plans. This shall include existing road width and surfacing, utility poles, existing
underground utilities and surface appurtenances, significant trees, landscaping, and other
elements that may affect design/construction.
8. All existing and proposed underground utilities and pipes shall be shown in the profile.
The location and depth of existing facilities should be verified if there is a potential conflict
with proposed facilities.
9. All street, water, sewer and storm drainage work shall be drawn on standard plan and
profile sheets. Street, water, sewer, storm drainage, irrigation, and electrical design
information shall all be shown on the same plan and profile sheets.
10. Plan sheets shall indicate all existing and proposed property lines, right-of-way lines, and
easements.
11. Plan sheets shall show all horizontal survey control as required to properly locate and tie
the improvements in horizontal location.
12. An erosion/sedimentation control plan sheet shall be included in the plan set.
WATER SYSTEM PLAN REQUIREMENTS
See CHAPTER 5 for specific design requirements.
1. Show all existing and proposed water system features if known, including but not limited
to:
a. Water mains;
b. Water valves;
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c. Water meters;
d. Water service lines;
e. Fire hydrants;
f. Blow offs;
g. Air and vacuum release valve assemblies;
h. Pressure reducing valves;
i. Fire sprinkler system lines;
j. Double check valves;
k. Post indicator valves; and
l. Thrust blocking/mechanical restraints.
2. Indicate all easements required for the water main extensions and future extensions.
3. Show the water system, irrigation system, and the sanitary sewer system on the same
plan and profile view for verification of minimum separation requirements. The design
information for each system may be on individual drawings for that system.
4. Show the length, size, and pipe type for all main extensions, fire sprinkler system services,
and domestic services where applicable.
5. Identify all joint connections; provide detail of all non-standard joints.
6. Show by station or dimension the location of all fire hydrants, tees, crosses, and services
relative to centerline or property lines.
7. A profile view shall be shown for all City water main extensions, aligned if practical with
the plan view. Clearly indicate the horizontal and vertical scales.
8. Show the minimum cover and minimum separation on each sheet.
9. In the profile view, show all utilities crossing the proposed water main.
SANITARY SEWER SYSTEM PLAN REQUIREMENTS
See CHAPTER 6 for specific design requirements.
1. Show all existing and proposed sanitary sewer system features including, but not limited
to, the following:
a. Sewer mains, gravity and force mains;
b. Side service, proposed locations;
c. Manholes;
d. Clean outs; and
e. Lift stations.
2. Indicate all easements required for the sanitary sewer main extensions and laterals.
3. Provide an overall site plan of development with contours, to show that all lots/parcels will
be served by the proposed sewer system at design depth for all new development.
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4. Show the sanitary sewer system and water system on the same plan and profile for
verification of minimum separation requirements. The design information for each may be
on individual drawings for that system.
5. Slope, length, size, and pipe type shall be indicated for all lines and side sewers. Pipe
length shall be measured from centerline of manholes.
6. Provide a profile for each sanitary sewer main extension. Clearly indicate the vertical and
horizontal scale. Show the profile on the same sheet with, and aligned underneath, the
plan view as practical.
7. The plan and profile must show the location of all existing and proposed gas, water,
irrigation, storm drain, and other utility lines and crossings.
8. Show all vertical data in the profile view and all horizontal data in the plan view. It is not
desirable to repeat the vertical data in the plan view unless it does not show in a profile.
9. Each manhole shall be uniquely numbered and shall be stationed off of a referenced
centerline. Indicate rim and invert elevations in and out at all manholes.
10. Indicate the length of each side sewer stub, the centerline stationing for each side sewer,
and the size.
STORMWATER SYSTEM PLAN REQUIREMENTS
See CHAPTER 7 for specific design requirements.
1. Show all existing features if known and all proposed storm sewer (drain) system features,
including but not limited to:
a. Storm drain mains and lines;
b. Catch basins;
c. Inlets;
d. Drywells;
e. Infiltration trenches;
f. Retention systems;
g. Biofiltration swales;
h. Culverts;
i. Streams;
j. Ditches;
k. Natural drainage swales;
l. Headwalls;
m. Oil/water separator assembly; and
n. Other requirements of the Department of Ecology’s Stormwater Management
Manual for Eastern Washington.
2. Indicate all easements required for the storm drainage system.
3. The plans shall clearly indicate the location of the storm drainage items stationed from a
referenced centerline.
4. Show all horizontal measurements and control in the plan view.
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5. Show slope, length, size, and pipe material for all storm drain mains and lines.
6. All catch basins and inlets shall be uniquely numbered and shall be clearly labeled.
Stationing and offsets shall be indicated from referenced centerline. Show all proposed
storm drain features within the right of way in a profile.
7. Indicate all grate, rim, and invert elevations in the profile view.
8. Provide stormwater runoff and drainage facilities sizing calculations as described in
CHAPTER 7.
STREET PLAN REQUIREMENTS
See CHAPTER 8 for specific design requirements.
1. Show all existing and proposed roadway improvements, including but not limited to:
a. Contours
b. Pavement and edge of pavement;
c. Concrete curb and gutter;
d. Sidewalk(s);
e. Utilities (manholes, utility poles, pedestals, valves, water meters, etc.);
f. Sidewalk ramps;
g. Signs and Barricades;
h. Channelization and pavement markings
i. Driveways;
j. Rockery or retaining walls;
k. Mailboxes;
l. Monuments;
m. Streetlights, conduits, junction boxes, and service cabinet;
n. Compliance with ADA requirements including design elevations at all pedestrian
ramps; and
o. Traffic control plans.
2. Show all Right of Way (R/W) lines, centerlines, and roadway widths for all rights of way.
3. Clearly differentiate between areas of existing pavement, areas of new pavement, and
areas to be overlaid.
4. Provide a cross section or typical section of all rights of way indicating right of way width,
centerline, pavement width, super-elevation or crown, sidewalk, street lights, curb and
gutter, pavement, and base thickness of proposed section.
5. Provide a Plan and Profile of all new public roadways or extensions of existing roadways.
Provide topography within the R/W including utilities. Indicate all horizontal and vertical
curve data, percent of grade, bearings, centerline stationing every 50 feet, finish grade
elevations, and existing ground line. The profile of the existing centerline ground should
extend a minimum of 100 feet before the beginning and at the end of the p roposed
improvements to show the gradient blend.
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6. Align the profile view with the plan view, if practical. Clearly indicate the horizontal and
the vertical scale.
7. Clearly label all profiles with respective street names and plan sheet reference numbers if
drawn on separate sheets.
8. Provide survey monuments along the road centerline at all ends of curves, intersection
points, angle points, and center of cul-de-sacs.
9. For developments where road work is required on an existing street, development plans
are required to include cross section of the existing street and spot elevations at proposed
intersections and appurtenances to the project.
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CHAPTER 4 - GENERAL REQUIREMENTS FOR ALL PROJECTS
FORWARD
The City of Pasco has adopted the latest edition of the Standard Specifications for Road, Bridge,
and Municipal Construction (Standard Specifications) prepared by the Washington State
Department of Transportation (WSDOT), and the American Public Works Association (APWA)
General Special Provisions (GSP's) for Division One General Requirements as the standard
specifications governing all design and construction of public works improvements by the City and
by private developers.
All references hereinafter made to the “Standard Specifications” shall refer to the latest edition of
the Standard Specifications described above. Except as may be amended, modified, or
supplemented hereinafter, each section of the Standard Specifications shall be considered as
much a part of these requirements as if they were actually set forth herein.
The Standard Specifications, General and Project Special Provisions, and City Standard Details
contained in these Design and Construction Standards shall apply in their entirety to all City of
Pasco public works projects. These Design and Construction Standards have been prepared to
form a compiled document intended to assist and inform developers, consultants, and contractors
of the construction requirements to be used on proposed public works improvements.
The Standard Specifications, General and Project Special Provisions, and City Standard Details
shall periodically be amended, revised, and updated. It shall be the responsibility of each user of
this information to verify that he has the latest revisions prior to submitting any work covered by
these specifications and details.
Copies of the Standard Specifications are available for review and inspection at the City of Pasco
Engineering Division or electronically at:
http://www.wsdot.wa.gov/Publications/Manuals/M41-10.htm.
Copies of the Standard Specifications may be purchased from:
Washington State Department of Transportation (WSDOT)
Engineering Publications
Post Office Box 47408
Olympia, WA. 98504-7408
Copies of the APWA GSP’s are available electronically at:
http://www.wsdot.wa.gov/Partners/APWA/Division_1_Page.htm.
Developers and contractors are encouraged to obtain a copy of these standards. Electronic
copies of the City of Pasco Design and Construction Standards and Specifications for Public
Works Improvements are available at:
http://pasco-wa.gov/index.aspx?NID=409.
GENERAL
All work shall be completed in accordance with the approved Plans, the latest edition of the
Standard Specifications for Road, Bridge, and Municipal Construction prepared by the Wash-
ington State Department of Transportation, amendments to the Standard Specifications,
referenced codes and organizations, and these Special Provisions.
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The American Public Works Association (APWA) General Special Provisions (G.S.P.'s) to
Division One of the WSDOT Standard Specifications shall amend Division One of the Standard
Specifications for Road, Bridge, and Municipal Construction.
All materials incorporated into a proposed public works improvements project shall meet the
requirements of Division 9 of the Standard Specifications or City of Pasco Design and
Construction Standards as shown in the Standard Details and Special Provisions.
1-01 DEFINITIONS AND TERMS
1-01.3 Definitions
The terms defined in Section 1-01.3 of the Standard Specifications shall be further described by
the following:
Consultant: Means an engineer licensed in the State of Washington, employed
by the Developer to design the improvement and prepare plans and
specifications, perform construction staking, or similar services.
Construction Documents: Means the project plans, specifications, and special provisions
prepared by the Developer's Consultant for the public works
improvements contemplated and approved by the City.
City: Means the City of Pasco, a municipal corporation, as represented
by its authorized officials, employees or agents. The term
“Contracting Agency” and “City” are synonymous.
Contractor: Means the person or firm employed by the Developer or under
Contract with the City to do the construction of the public works
improvements.
Developer: Means the person or firm constructing the new development and
engaging the services of and employing consultants, and/or
contractors and paying for the design and construction of the public
works improvements to be transferred to the City.
Drawings: Means the construction plans prepared by the Developer's
Consultant for the public works improvements contemplated. The
terms “Construction Documents,” “Contract Documents,” “Plans,”
“Engineer’s Plans,” “Engineer’s Drawings,” “Working Drawings,”
and “Project Manual” are synonymous.
City Engineer: Means the appointed City Engineer for the City of Pasco or his/her
duly authorized agent or representative.
Owner: Means the City of Pasco acting through its legally established
officials, boards, commissions, etc., as represented by its
authorized officers, employees, or agents.
Public Works Director: Means the appointed official for the City, responsible for managing
the Department of Public Works.
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Standard Plans and Details: Means specific drawings adopted by the City of Pasco and revised
from time to time which show frequently recurring components of
work which have been standardized for use.
Standard Specifications: The latest edition of Standard Specifications for Road, Bridge, and
Municipal Construction prepared by the Washington State Depart-
ment of Transportation, and amendments, and the APWA GSP's
for Division One that are, by this reference, made part of the
Contract Documents. Except as may be amended, modified, or
supplemented hereinafter, each section of the Standard
Specifications shall be considered as much a part of these
Construction Documents as if they were actually set forth herein.
Special Provisions: The Special Provisions supplement or modify the Standard
Specifications and supersede any conflicting provisions of the
Standard Specifications for Road, Bridge, and Municipal Construc-
tion and the appended amendments to the Standard Specifications
and are made a part of a Construction Document.
Should any conflicts be encountered, the following inter-relationships shall govern: The Special
Provisions shall supersede the APWA GSP's, which shall supersede the WSDOT Amendments,
which shall supersede the Standard Specifications.
Supplement this section with the following:
All references in the Standard Specifications, Amendments, or WSDOT Gene ral Special
Provisions, to the terms “Department of Transportation”, “Washington State
Transportation Commission”, “Commission”, “Secretary of Transportation”, “Secretary”,
“Headquarters”, and “State Treasurer” shall be revised to read “Contracting Agency”.
All references to the terms “State” or “state” shall be revised to read “Contracting Agency”
unless the reference is to an administrative agency of the State of Washington, a State
statute or regulation, or the context reasonably indicates otherwise.
All references to “State Materials Laboratory” shall be revised to read “Contracting Agency
designated location”.
All references to “certification of completed public improvements” shall be interpreted to
mean the Contracting Agency form(s) by which final completion is granted. Public
improvements shall be deemed accepted by the City one year from the date of
certification.
1-04 SCOPE OF THE WORK
1-04.4 Changes
Supplement this section with the following:
No changes in the work covered by the approved Construction Documents shall be made
without having prior written approval of the Developer and the City.
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1-04.11 Final Cleanup
Delete this section and replace it with the following:
The Contractor shall perform final cleanup as provided in this section to the Developer's
and City's satisfaction. The date of acceptance will not be established until this is done.
The material sites and all ground the Contractor occupied to do the work shall be left neat
and presentable. The Contractor shall:
1. Remove all rubbish, surplus materials, discarded materials, falsework, temporary
structures, equipment, and debris, and
2. Deposit in embankments, or remove from the project, all unneeded, oversized rock
left from grading, surfacing, or paving.
Partial cleanup shall be done by the Contractor when he feels it is necessary or when, in
the opinion of the City or Developer, partial clean-up should be done prior to either major
cleanup or final inspection.
1-04.12 Waste Site (New Section)
The following new section shall be added to the Standard Specifications:
Where there is additional waste excavation in excess of that needed for the project and in
excess of that needed for compliance with requests of the Developer or City, the
Contractor shall secure and operate his own waste site at his own expense. The
Contractor shall also be required to secure and operate his own waste site at his own
expense for the disposal of all unsuitable material, asphalt, concrete, debris, waste
material, and any other objectionable material which is directed to waste.
The Contractor shall comply with the State of Washington's regulations regarding disposal
of waste material as outlined in WAC 173-304, Subchapter 461.
1-05 CONTROL OF WORK
1-05.1 Authority of the Engineer
Supplement this section with the following:
Unless otherwise expressly provided in the approved Construction Drawings,
Specifications and Addenda, the means and methods of construction shall be such as the
Contractor may choose; subject, however, to the Consultant and the City's right to reject
the means and methods proposed by the Contractor which (1) will constitute or create a
hazard to the work, or to persons or property; or (2) will not produce finished work in
accordance with the terms of the approved Construction Documents. Approval of the
Contractor's means and methods of construction or his failure to exercise his right to reject
such means or methods shall not relieve the Contractor of the obligation to accomplish
the result intended by the Construction Documents; nor shall the exercise of such right to
reject create a cause for action for damages.
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1-05.3(1) Project Record Drawings (New Section)
The following new section shall be added to the Standard Specifications:
In consideration of the following Pasco Municipal Code section;
21.30.050 Approval Requirements. Prior to approval of a final plat, all required
infrastructure improvements including as-built drawings and data of all
underground utilities necessary to serve said plat must be constructed and
accepted by the City Engineer. In lieu of actually completing all improvements, the
developer may provide the City with a bond, cash or irrevocable letter of credit in
an amount equal to 125 percent of the City Engineer’s estimate of the cost to
complete the required infrastructure improvements. No certificate of occupancy will
be issued for any structure in a subdivision until all infrastructure improvements
are completed. [Ord. 3398 § 2, 1999; Code 1970 § 26.28.050.]
This portion of PMC shall apply to all privately developed parcels, including commercial,
within the City of Pasco and the expected as-built documentation will follow the procedures
and requirements contained herein for final acceptance of work. Drawings shall be kept
current weekly, with all field instruction, change orders, and construction adjustment.
Drawings shall be subject to the inspection of the Developer and the City at all times.
In conjunction with the Public Works Engineering Plan Review Process, post construction
record drawings are required for all Private Development projects. The intent of this
document is to guide the designing Engineer, the Developer and their Consultants in
providing the City with acceptable record drawings and survey information.
When the improvements are complete and intended for acceptance by the City, including
landscaping, the developer shall prepare “as-built” record drawings for the City using the
current set of approved construction drawings, including all revisions and contractor’s field
mark-ups. The record drawings shall incorporate all changes made by both the Engineer
and in the field during the construction process. Changes to be noted shall include
changes in material, size, grade and location of utilities.
Bonding or Phased Improvements
The Developer can bond for remaining improvements per PMC 21.30.050. In cases where
the remaining improvements are bonded, the Developer is responsible to provide
complete record drawings for constructed improvements, both paper and electronic, prior
to receiving bonding acceptance consideration for remaining improvements or phases.
Future phases will not receive bonding acceptance without written acceptance of the
Record Drawings from completed phases per this section.
Preliminary (Paper) Record Drawing Procedures
1. A licensed Engineer representing the Developer will ensure that all improvements
associated with the approved construction plans are obtained and create an
accurate as-built topographical representation of the data.
2. The data, differing from initial plan acceptance, will be incorporated into the
preliminary record drawings and the Engineer will adjust the features in the record
drawings to match the actual data. All revised and verified elevations for sewer,
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storm, water, and irrigation will be shown on the record drawings by striking a
single line through the design elevations and adding the surveyed “as-built”
elevations. Horizontal locations will be indicated by using centerline station and
offsets. All revised and verified station and offsets will be shown on the record
drawings by striking a single line through the design station and offsets and adding
the surveyed station and offsets. The stationing will be based on the approved
construction drawings. The Engineer will update both the plan and profile layouts
with the revised and verified data. Revised information shall be “clouded” as
appropriate to indicate revisions.
3. Prior to final walk-through, the Engineer will compile the data and submit two
copies of the preliminary (paper) record drawings to the City. The walk-through will
not be scheduled until the paper record drawings are received.
Preliminary Record Drawing Submittals
• Two (2) paper copies (22”x34”) including all field changes made.
• The preliminary record drawing will have all changes from the approved
construction drawings clouded.
• The preliminary record drawing submittal will include the final field information
as-built.
Final (Mylar and Electronic) Record Drawing Procedures
After receiving approval of the preliminary paper record drawing from the City, the
developer/designing Engineer will submit the following:
Final Record Drawing Submittals
• One (1) full size Mylar copy of the corrected record drawing. The final record
drawing shall be signed and sealed by a licensed Engineer and licensed
surveyor. The clouding of changes will be removed before the Mylar is
submitted.
• One (1) PDF copy of the final record drawing.
• One (1) electronic copy of data conforming to the standards set forth by the
City of Pasco Geographic Information System (GIS) as part of the Information
Services (IS) Department.
Electronic Record Drawing Requirements:
http://data-cityofpasco.opendata.arcgis.com/search?tags=ABSP
Electronic Record Drawings are to be delivered to:
PascoGIS@pasco-wa.gov
Additional questions:
Deshawn Robins, GIS Administrator @ 509-543-5750 or
robinsd@pasco-wa.gov
The project will not be considered Substantially Complete until both the Mylar and
Electronic as-builts have been deemed acceptable by the City.
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1-05.5 Construction Staking (New Section)
The following new section shall be added to the Standard Specifications:
A land surveyor licensed in the State of Washington, retained by the Developer, shall
establish the line and grade of proposed construction by offset stakes. Said surveyor shall
establish the centerline for minor structures and bench marks at convenient locations for
use by the Contractor and City inspectors. GPS systems may be used by the Contractor,
but physical reference points shall be available for City inspectors.
The Contractor shall establish grades from the surveyor’s stakes at suitable intervals in
accordance with industry standards and acceptable to the City. Where new construction
adjoins existing construction, the Contractor shall make such adjustments in grade as are
necessary, and approved by the City.
1-05.6 Inspections of Work and Materials
Supplement this section with the following:
The City Engineer or his representative may not be on the job site full-time. The Contractor
shall follow the approved construction plans and specifications, schedule, and request
inspections and testing at the appropriate times as required herein. The Engineer will try
to provide inspections on short notice, but if unable to, the requirements for proper notice
shall apply. The project schedule prepared by the Contractor and approved by the
Engineer shall also be used as a guide for the Contractor to schedule inspections. The
Contractor shall provide a minimum 48 hours notice to request inspections and testing,
but in no case shall there be more than 72 hours notice. The request shall state the date
and approximate time the inspection or test is requested. If the Contractor has requested
two (2) inspections or tests and is not prepared for said inspection or test, the Contractor
shall pay the costs for any additional improperly scheduled requests.
At the beginning of the project, or each applicable construction activity, the Contractor
shall meet with the City Engineer or his representative and establish a minimum 100 feet
of product, in the field, which meets the specifications. This work includes: Survey staking
and control, pavement cuts, utility trenches, trench bedding, pipe installation, backfill,
patches, curb and gutter alignment, grade and finish, sidewalk finish, paving finish, and
any other activities determined by the Engineer to be important to the project. No major
amount of work shall proceed until this is established. This does not waive the
Contractor’s requirements in the specifications for quality control or materials used.
Inspections and testing are mandatory for acceptance of backfilling any utility trenches;
placing base course and top course for streets; paving; placing sidewalks, curbs and
gutters; storm, sewer and water line installation.
1-05.7 Removal of Defective and Unauthorized Work
(October 1, 2005 APWA GSP)
Supplement this section with the following:
If the Contractor fails to remedy defective or unauthorized work within the time specified
in a written notice from the City Engineer, or fails to perform any part of the work required
by the Contract Documents, the City Engineer may correct and remedy such work as may
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be identified in the written notice, with Contracting Agency forces or by such other means
as the Contracting Agency may deem necessary.
If the Contractor fails to comply with a written order to remedy what the City Engineer
determines to be an emergency situation, the Engineer may have the defective and
unauthorized work corrected immediately, the rejected work removed and replaced, or
have work the Contractor refuses to perform completed by using Contracting Agency or
other forces. An emergency situation is any situation when, in the opinion of the Engineer,
a delay in its remedy could be potentially unsafe, or might cause serious risk of loss or
damage to the public.
Direct or indirect costs incurred by the Contracting Agency attributable to correcting a nd
remedying defective or unauthorized work, or work the Contractor failed or refused to
perform, shall be paid by the Developer/Contractor. Such direct and indirect costs shall
include in particular, but without limitation, compensation for additional professional
services required, and costs for repair and replacement of work of others destroyed or
damaged by correction, removal, or replacement of the Contractor’s unauthorized work.
The rights exercised under the provisions of this section shall not diminish the Contracting
Agency’s right to pursue any other avenue for additional remedy or damages with respect
to the Contractor’s failure to perform the work as required.
Supplement this section with the following:
For new roadway/street construction and overlays, HMA work rejected shall require the
replacement of the entire road or street width from block to block or as approved in writing
from the City Engineer. For trench patching, HMA work rejected shall require the
replacement of the entire patch width from block to block or as approved in writing from
the City Engineer.
1-05.8 Means and Methods (New Section)
The following new section shall be added to the Standard Specifications:
Unless otherwise expressly provided in the Contract Drawings, Specifications and
Addenda, the means and methods of construction shall be such as the Contractor may
choose; subject, however, to the Consultant's or City’s right to reject means and methods
proposed by the Contractor which (1) will constitute or create a hazard to the work, or to
persons or property; or (2) will not produce finished work in accor dance with the terms of
the Contract. The Consultant's or City’s approval of the Contractor's means and methods
of construction or his failure to exercise his right to reject such means or methods shall
not relieve the Contractor of the obligation to accomplish the result intended by the
Contract; nor shall the exercise of such right to reject create a cause for action for
damages.
1-05.10 Guarantees
Delete this section and replace it with the following:
If defective and unauthorized materials or work is discovered within the guarantee
timeframe after the certification of completed public improvements date, the
Developer/Contractor shall promptly, upon written request, return and in accordance with
the instructions either correct such work, or if such work has been rejected, remove it from
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the Project Site and replace it with non-defective and authorized work, all without cost to
the City. If the Contractor does not promptly comply with the written request to correct
defective and unauthorized work, or if an emergency exists, the City reserves the right to
have defective and unauthorized work corrected or rejected, removed, and replaced
pursuant to the provisions of Section 1-05.7 of the Standard Specifications.
1-05.13 Superintendents, Labor, and Equipment of Contractor
(August 14, 2013 APWA GSP)
Delete the sixth and seventh paragraphs of this section.
1-05.14 Cooperation With Other Contractors
Supplement this section with the following:
No additional compensation will be given to the Contractor for any coordination or delays
caused by other nearby construction projects.
1-05.16 Water and Power (New Section)
The following new section shall be added to the Standard Specifications:
Water Supply: The Developer shall make necessary arrangements and shall bear the
costs for water necessary for the performance of the work. Water for use on the projects
may be purchased from the City of Pasco, and the Contractor shall arrange for and convey
the water from the nearest convenient hydrant or other source at his own expense. The
hydrants shall be used in accordance with the City of Pasco Water Department regula-
tions.
If City water is used for any work related to a project, a fire hydrant meter and gate valve
will need to be obtained from the City of Pasco to be used specifically for this project. The
City will charge the Contractor for any water used during construction. The Contractor
shall not operate the hydrant as a gate valve, nor shall the Contractor be allowed to
operate any other City owned valve. The Contractor shall provide the ne cessary back
flow prevention device when connecting to the water service. The Fire Hydrant Meter
requirements and the Fire Hydrant Meter Application are available at the Customer
Service Window and the Engineering Department.
The City reserves the right to deny the use of fire hydrants where deemed inappropriate
by the City.
Power Supply: The Developer shall make necessary arrangements and shall bear the
costs for power necessary for the performance of the work.
1-05.17 Oral Agreements (New Section)
The following new section shall be added to the Standard Specifications:
No oral agreement or conversation with any officer, agent, or employee of the Contracting
Agency, either before or after construction, shall affect or modify any of the terms or
obligations contained in any of the City-approved documents. Such oral agreement or
conversation shall be considered as unofficial information and in no way binding upon the
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Contracting Agency, unless subsequently put in writing and signed by the Contracting
Agency.
1-06 CONTROL OF MATERIAL
1-06.1 Approval of Materials Prior to Use
Revise the first paragraph to read:
Prior to use, the Contractor shall notify the City Engineer of all proposed materials. The
Contractor shall use the Request for Approval of Material (RAM) form, WSDOT Form 350-
071. Materials included in the WSDOT Qualified Products List (QPL) but not in the City’s
Construction Standards will be taken under consideration by use of the RAM form. The
Contractor shall note all deviations from the governing specifications and/or drawings and
shall reference the appropriate paragraph of the section or sheet of the drawing. If the
reason for the deviation from the specifications is not readily apparent, a written
explanation shall be included. The City Engineer’s review of the Contractor’s submittals
shall not relieve the Contractor of the entire responsibil ity for the correctness of details
and dimension. The Contractor shall assume all responsibility and risk for any misfits due
to any errors in information submitted by the Contractor. Any fabrications or other work
performed in advance of the receipt of approved submittals shall be entirely at the
Contractor’s risk and expense. The Contractor shall be responsible for the dimensions
and the design of adequate connections and details.
1-06.2(1) Samples and Tests for Acceptance
Supplement this section with the following:
The Contractor/Developer shall be responsible for scheduling and paying for all material
and compaction testing required by these Design and Construction Standards for new
public works Improvements. All testing services shall be performed by an independent,
certified testing firm and/or laboratory meeting the approval of the City Engineer. The
Contractor shall submit information relating to the qualifications of the proposed testing
firm to the City for review and approval prior to the preconstruction conference. The testing
firm shall provide copies of all test results to the City within 24 hours after completion of
any test. Test reports shall become the property of the City. Testing frequencies listed
below may be modified to assure compliance with the Specifications.
Trench Backfill
Copies of moisture-density curves for each type of material encountered and copies of all
test results shall be provided to the City as construction progresses.
Three (3) compaction tests, at varying depths, shall be performed within the first one
hundred (100) feet of pipeline installed to establish compaction method. Once a
satisfactory method has been established, one test shall be performed for each one
hundred (100) linear feet of pipeline installed. Tests shall be taken at varying depths along
the trench. Compaction method shall be reestablished each time backfill material,
compaction equipment, or method of operation changes.
The City Engineer may request additional tests be performed at the
Contractor's/Developer’s expense, if test results do not meet the required trench backfill
densities.
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Roadway Subgrade
Copies of the moisture density curves for each type of material encountered and copies
of all test results shall be provided to the City Engineer as construction progresses.
Two (2) compaction tests shall be taken for the first ten thousand (10,000) square feet and
one (1) test for each additional ten thousand (10,000) square feet.
The City Engineer may request additional tests be performed at the Contractor's expense,
if test results do not meet the required subgrade densities. Subgrade compaction shall be
as specified for Roadway Embankment in Section 2-03.3(14)C, Method C.
Embankment
Copies of the moisture density curves for each type of material encountered and copies
of all test results shall be provided to the City Engineer as construction progresses.
Two (2) compaction tests shall be taken for the first one thousand (1,000) square feet and
one (1) test for each additional one thousand (1,000) square feet. Tests will be taken at
varying depths within the embankment.
The City Engineer may request additional tests be performed at the Contractor's expense,
if test results do not meet the required subgrade densities. Subgrade compaction shall be
as specified for Roadway Embankment in Section 2-03.3(14)C, Method C.
Ballast and Crushed Surfacing
Copies of the moisture density curves and gradation for each type of material incorporated
into the project and copies of all test results shall be provided to the City Engineer as
construction progresses.
Two (2) compaction tests shall be taken for the first ten thousand (10,000) square feet and
one (1) test for each additional ten thousand (10,000) square feet.
The City Engineer may request additional tests be performed at the
Contractor's/Developer’s expense, if test results do not meet the required subgrade
densities.
Compaction of ballast and crushed surfacing shall be as specified in Section 4-04.3(5).
Asphalt Pavement
Asphalt paving may not occur until successful compaction test results are provided to the
City Engineer for trench backfill, subgrade, embankment, ballast and crushed surfacing,
as applicable. Copies of the reference maximum density test for each class of Hot Mix
Asphalt pavement and copies of all test results shall be provided to the City Engineer as
construction progresses.
The City Engineer may request additional tests be performed at the
Contractor's/Developer’s expense, if test results do not meet the required densities.
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Compaction of Hot Mix Asphalt pavement shall be as specified in Section 5-04.3(10).
Cement Concrete Curb, Gutter, and Sidewalk
A copy of the cement concrete design mix or certification from the concrete supplier that
the concrete provided has been prepared to the strength requirement as specified
elsewhere in these specifications.
All testing procedures shall be conducted in accordance with applicable Sections of
Division 6-02 of the Standard Specifications and Sections 8-04 and 8-14 of these
Construction Standards.
Copies of all test results shall be provided to the City Engineer as construction progresses.
1-06.2(2) Statistical Evaluations of Materials for Acceptance
Delete Section 1-06.2(2).
1-07 LEGAL RELATION AND RESPONSIBILITIES TO THE PUBLIC
1-07.1 Laws to be Observed
(October 1, 2005 APWA GSP)
Supplement Section 1-07.1 with the following:
In cases of conflict between different safety regulations, the more stringent regulation shall
apply.
The Washington State Department of Labor and Industries shall be the sole and
paramount administrative agency responsible for the administration of the provisions of
the Washington Industrial Safety and Health Act of 1973 (WISHA).
The Contractor shall maintain at the project site office, or other well-known place at the
project site, all articles necessary for providing first aid to the injured. The Contractor shall
establish, publish, and make known to all employees, procedures for ensuring immediate
removal to a hospital, or doctor’s care, persons, including employees, who may have been
injured on the project site. Employees should not be permitted to work on the project site
before the Contractor has established and made known procedures for removal of injured
persons to a hospital or a doctor’s care.
The Contractor shall have sole responsibility for the safety, efficiency, and adequacy of
the Contractor’s plant, appliances, and methods, and for any damage or injury resulting
from their failure, or improper maintenance, use, or operation. The Contractor shall be
solely and completely responsible for the conditions of the project site, including safety for
all persons and property in the performance of the work. This requirement shall apply
continuously, and not be limited to normal working hours. The required or implied duty of
the Engineer to conduct construction review of the Contractor’s performance does not,
and shall not, be intended to include review and adequacy of the Contractor’s safety
measures in, on, or near the project site.
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Amend the second sentence of the first paragraph to read:
The Contractor/Developer shall indemnify and save harmless the City of Pasco (including
any agents, officers, employees, and representatives) against any claims that may arise
because the Contractor (or any employee of the Contractor or subcontractor or
materialman) violated a legal requirement.
1-07.5(1) General
Supplement this section with the following:
4. Dumping of material removed from catch basins and other storm drain structures into
the right of way, sanitary sewer or storm drain system is prohibited. Contractor’s
caught disposing of materials in this manner will be assessed damages and may have
their prequalification status revoked.
1-07.5(3) State Department of Ecology
Add the following:
9. Comply with the requirements and special general conditions of the Construction
Stormwater General Permit issued by the Washington State Department of Ecology
for this project.
1-07.6 Permits and Licenses
Supplement this Section with the following:
The Contractor shall obtain a City of Pasco right-of-way permit for all work within the right-
of-way prior to the start of work consistent with the City of Pasco Municipal Code Title 12.
The Contractor and all subcontractors are responsible for obtaining and paying for
business licenses in the City of Pasco.
1-07.13 Contractor’s Responsibility for Work
1-07.13(1) General
Supplement this section with the following:
The Contractor is responsible for constructing and completing all work included in the
approved Construction Documents and any other work directed by the Developer in a
professional manner with first-class workmanship.
The Contractor shall keep the City of Pasco, the Developer, and the Consultant informed
in writing of the address to which official correspondence is to be directed, the address
and phone number of the person in charge of his field personnel, and the address and
telephone number of the Contractor's representative who will be responsible and available
outside of normal working hours for emergency repairs and the maintenance of traffic
control and safety devices.
The Developer shall be responsible for the satisfactory operation and condition of all public
improvements for a period of two (2) years following final inspection and City acceptance.
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1-07.17 Utilities and Similar Facilities
Supplement this section with the following:
It shall be the Contractor/Developer’s responsibility to notify all non-City of Pasco utility
companies of project including coordination of any impacts.
It shall be the Contractor's responsibility to investigate and verify the presence and location
of all utilities prior to construction.
The Contractor/Developer shall call for field location, not less than two nor more than ten
business days before the scheduled date for commencement of excavation which may
affect underground utility facilities, unless otherwise agreed upon by the parties involved.
A business day is defined as any day other than Saturday, Sunday, or a legal local, state,
or federal holiday. The phone number for the Northwest Utility Notification Center for
Pasco is 1-800-424-5555 (or 811). If no one-number locator service is available, notice
shall be provided individually by the Contractor to those owners known to or suspected of
having underground facilities within the area of proposed excavation.
The Contractor/Developer is alerted to the existence of Chapter 19.122 RCW, a law
relating to underground utilities. Any cost to the Contractor/Developer incurred as a result
of this law shall be at the Contractor's/Developer’s expense.
No excavation shall begin until all known facilities, in the vicinity of the excavation area,
have been located and marked.
In addition to the requirements of RCW 19.122, the Contractor shall use surface features
and other evidence in determining the approximate utility location prior to excavation. The
Contractor shall hand dig to expose known utilities.
Where the location of the work is in proximity to overhead wires and power lines, the
Contractor shall coordinate all work with the utility and shall provide for such measures as
may be necessary for the protection of workmen.
Only City personnel shall operate water system valves.
1-07.18 Public Liability and Property Damage Insurance
Supplement this section with the following:
The Contractor shall obtain and maintain in full force and effect during the duration of the
work public liability and property damage insurance in accordance with this section and
as modified herein.
Prior to start of construction, the Contractor/Developer shall furnish the City of Pasco a
Certificate of Insurance and the additional insured endorsements as evidence of com-
pliance with these requirements. This certificate shall name the City of Pasco, its
employees, agents, elected and appointed officials, consultants, and all subcontractors as
“additional insureds” and shall stipulate that the policies named thereon cannot be
canceled unless at least forty-five (45) days written notice has been given to the City of
Pasco. The certificate shall not contain the following or similar wording regarding
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cancellation notification: “Failure to mail such notice shall impose no obligation or liabil ity
of any kind upon the company, its agents, or representatives.”
1-07.23 Public Convenience and Safety
Supplement this section with the following:
All signs, barricades, traffic control devices, and labor for traffic control required by
construction activities for the control of traffic shall be supplied, placed, and maintained by
the Contractor. This shall apply to detours and traffic control both within and outside the
limits of the project.
All work shall be done under a plan which shall have the approval of the City of Pasco
Engineering Division and create a minimum of interruption or inconvenience to pedestrian
and vehicular traffic. All arrangements to care for such traffic will be the Contractor's
responsibility and shall be made at his expense. All work shall be carried out with due
regard for public safety. Open trenches shall be provided with proper barricades and at
night they shall be distinctly indicated by adequately placed lights. At entrances to
business properties and other private roads, driveways, bridges, or other such means as
to provide access shall be provided by the Contractor. The Contractor shall maintain
vehicular and pedestrian access to businesses at all times that businesses are open for
business.
Upon failure of the Contractor to immediately provide and maintain adequate suitable
barricades, lights and detour signs, when ordered to do so, the City shall be at liberty,
without further notice to the Contractor or the Surety, to provide the same and request
payment for providing proper barricades, lights, and signs, and the City assumes no lia-
bility connected therewith.
Any traffic restriction must have prior approval of the City of Pasco Engineering Division.
Appropriate traffic control measures and signing are required during such temporary road
closures.
It shall be the responsibility of the Contractor to secure the City’s approval for any desired
road closure and associated traffic control plan including detours. Following approval, the
Contractor shall notify the Developer, City of Pasco, and the Police and Fire Departments,
Pasco School District, Basin Disposal, and Benton Franklin Transit at least 24 hours prior
to closing any street. When the street is re-opened, it shall again be the responsibility of
the Contractor to notify the above named departments and persons.
1-07.23(1) Construction Under Traffic
Delete the sixth and seventh sentences of this section.
1-07.28 Safety Standards (New Section)
The following new section shall be added to the Standard Specifications:
All work shall be performed in accordance with all applicable local, state, and federal
health and safety codes, standards, regulations, and/or accepted industry standards. It
shall be the responsibility of the Contractor to ensure that his work force and the public
are adequately protected against any hazards.
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The City of Pasco or Developer shall have the authority at all times to issue a stop work
order at no penalty if, in their opinion, working conditions present an undue hazard to the
public, property, or the work force. Such authority shall not, however, relieve the
Contractor of responsibility for the maintenance of safe working conditions or assess any
responsibility to the City or Developer for the identification of any or all unsafe conditions.
1-07.29 Notifying Property Owners (New Section)
The following new section shall be added to the Standard Specifications:
When construction activities will affect ingress and egress to a property along the project
alignment, the Contractor shall be responsible for notifying the occupant/occupants of the
property 72 hours prior to the construction activity beginning. If personal contact with the
occupant is not possible, the Contractor shall leave written notification. A copy of all
notifications shall be provided to the City.
1-08 PROSECUTION AND PROGRESS
1-08.3 Progress Schedule
Supplement this section with the following:
Prior to the commencement of any work, a preconstruction conference shall be held. The
Contractor or Developer shall contact the City of Pasco Engineering Division and set a
date and time for the meeting. It shall be the responsibility of the Contractor/Developer to
notify and invite all parties having an interest in the project to the meeting, including the
major subcontractors, Engineering Division, Irrigation Districts, and all applicable private
utilities.
At this conference, all points of the approved Plans and Specifications will be open to
discussion including scope, order and coordination of work, equipment lead time required,
means and methods of construction, inspection and reporting procedures, etc. The
Contractor should satisfy himself that all provisions and intentions of the work are fully
understood.
The Contractor shall prepare and submit to the City and Developer at the preconstruction
conference a Construction Progress and Completion Schedule using a bar graph format.
Items in the Schedule shall be arranged in the order and sequence in which they will be
performed. The schedule shall be drawn to a time scale, shown along the base of the
diagram, using an appropriate measurement per day with weekends and holidays indi-
cated. The Construction Progress Schedule shall be continuously updated and, if
necessary, redrawn upon the first working day of each month or upon issuance of any
Change Order which substantially affects the scheduling. Copies (2 prints or 1
reproducible) of newly updated Schedules shall be forwarded to the City Engineer, as
directed, immediately upon preparation.
Any proposed road or sidewalk closures shall be presented to City Engineering at the
preconstruction conference for consideration, including duration of closure. If approved,
closures shall not extend beyond permitted duration. Should closures extend beyond the
duration, road user delay costs shall be assessed to the Developer and paid to the City of
Pasco, as calculated by the City Engineer using the spreadsheet adopted by Ohio DOT,
available at City Hall Engineering Division.
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At the discretion of the City Engineer, a weekly meeting between representatives of the
City (inspector and/or engineer) and contractor (foreman, supervisor, and/or project
manager) shall be held at the project site or at City Hall at a pre-determined time. The
contractor shall present an update on project status, project schedule, and any problems
that have arisen.
1-10 TEMPORARY TRAFFIC CONTROL
Supplement this section with the following:
The provisions of the latest edition of the Manual on Uniform Traffic Control Devices
(MUTCD) for Streets and Highways and amendments thereto published by the U.S.
Department of Transportation, Federal Highway Administration, and WSDOT by this
reference are made a part of these Documents.
1-10.2(2) Traffic Control Plans
Delete the entire section and replace with the following:
The Contractor shall prepare a signing plan showing the necessary Class A and B
construction signing, barricades, and traffic control devices required for the project and
submit it to the City, no later than the preconstruction conference date. When th e Class
B signing for a particular area will be provided as detailed on one or more of the figures
included in the MUTCD without modification, the Contractor may reference the applicable
MUTCD figure at the appropriate location on the Plan. When this procedure is used,
variable distances such as minimum length of taper must be specified by the Contractor.
The signing plan prepared by the Contractor shall provide for adequate warning within the
limits of the project and on all streets, alleys, and driveways entering the project so that
approaching traffic may turn left or right onto existing undisturbed streets before reaching
the project. The Plan shall be prepared to create a minimum of inconvenience for
pedestrian and vehicle traffic.
All modifications to the accepted signing plans shall be reviewed by the City Engineering
Division.
1-10.3(3)A Construction Signs
The first sentence of the first paragraph is revised to read:
All signs, barricades, flashers, cones, traffic safety drums, barricades, and other traffic
control devices required by the approved traffic control plan(s), as well as any other
appropriate signs prescribed by the City or County, shall be furnished and maintained by
the Contractor.
Open trenches shall be provided with proper barricades and at night they shall be distinctly
indicated by adequately spaced lights.
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7-08 GENERAL PIPE INSTALLATION REQUIREMENTS
7-08.1 General
Add the following:
All construction work shall be inspected by the City of Pasco prior to backfilling. At least
48 hours notice shall be given to the City Engineering Division prior to backfilling.
The Contractor shall notify the Utility Notification Center (One Call Center) at least 48
hours prior to start of excavation so that underground utilities may be marked. Telephone
number is 1-800-424-5555.
7-08.3(1)A Trenches
Supplement this section with the following:
Existing pavement shall be neatly saw-cut on both sides of the trench parallel consistent
with the dimensions presented on the Trench Surfacing Repair standard detail, including
a saw-cutting prior to surface repair.
7-08.3(1)C Bedding the Pipe
Add the following:
Gravel Backfill for Pipe Zone (including Bedding): Pipe zone material shall be Crushed
Surfacing Top Course meeting the requirements of section 9-03.9(3), and shall be placed
and compacted in layers as designated by the City. With prior approval by the City
Engineer, suitable native material may be an acceptable alternate for pipe zone bedding
above the bottom of the pipe.
Trench Backfill: All longitudinal pipeline trenches (parallel to curb) may be backfilled full
depth above the pipe zone with native material (free of organic material, wood, rocks, or
pavement chunks larger than 6-inches in maximum dimension), unless otherwise directed
by the City of Pasco. Street crossings, transverse trenches, and other locations as
directed by the City of Pasco may be required to be backfilled full depth with imported
select backfill. Imported select backfill shall be crushed surfacing top course or crushed
surfacing base course meeting the requirements of section 9-03.9(3), placed and
compacted in layers.
7-08.3(2)B Pipe Laying – General
Supplement this section with the following:
Potable domestic water mains shall maintain a 10-foot horizontal and 18-inch vertical
separation above non-potable pipelines (sewer, irrigation, and storm) consistent with the
Department of Health Water System Design Manual.
When parallel to existing utilities, new domestic water mains shall be installed a minimum
of 10 feet horizontally (outside pipe wall to outside pipe wall, typical) and 18 inches
vertically above other non-potable pipelines. Where this is not possible at the discretion
of the Engineer, a water main may be installed a minimum of five feet horizontally and 18
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inches vertically above other non-potable pipelines, as long as the water main is placed in
a separate trench and on a bench of undisturbed earth.
When crossing existing utilities, new domestic water mains shall be installed a minimum
of 18 inches vertically above non-potable pipelines. Where this is not possible, or the
water main passes under a non-potable pipeline, the water main shall be installed in a
pressure rated pipe casing extending 10 feet each side of the crossing. In addition, where
the water main passes under an existing non-potable pipeline, support shall be provided
for the non-potable pipeline by backfilling the non-potable pipeline trench with controlled
density backfill or other approved methods. A minimum of 6 inches of separation between
the crossing pipelines must be maintained in all cases.
When parallel to existing potable water mains, new non-potable pipelines shall be installed
a minimum of 10 feet horizontally and 18 inches vertically below existing water mains.
Where this is not possible at the discretion of the Engineer, a non-potable pipeline may be
installed a minimum of five feet horizontally from an existing water main, as long as the
non-potable pipeline is installed a minimum of 18 inches vertically below the water main
and the non-potable pipeline is placed in a separate trench. If the vertical separation
cannot be met, then the non-potable pipeline shall be constructed of or encased in
materials equal to water main standards with a minimum pressure rating of 165psi (C900
PVC DR 25, ductile iron, etc.).
When crossing existing potable water mains, new non-potable pipelines shall be installed
a minimum of 18 inches vertically below existing water mains. Due to difficulties in
compacting under existing utilities, controlled density backfill or other City Engineer-
approved materials shall be placed as backfill at the crossing locations, to a depth of the
water main spring line. Where the minimum clearance is not possible, or the non-potable
pipeline passes above a water main, a full length of non-potable pipeline shall be centered
at the crossing. In addition, the non-potable pipeline shall either be installed in a pressure
rated pipe casing extending 10 feet each side of the crossing, or be constructed of one
standard length of pipe material equal to waterline standards with a minimum pressure
rating of 165psi (C900 PVC DR 25, ductile iron, etc.). A minimum of 6 inches of separation
between the crossing pipelines must be maintained in all cases.
Magnetic detectable marking tape shall be installed above the pipe. The tape shall be
placed approximately two feet above the top of the pipe and shall extend its full length.
The horizontal location of the tape shall vary no more than one foot from the centerline
alignment of the pipe. Detectable marking tape shall meet the requirements of Section 9-
15.18 of the Standard Specifications. Tape width shall be a minimum of 3 inches wide, or
wider as recommended by the manufacturer for the installation depth.
Revise the third paragraph of this section to read:
Pipe shall be laid to a true line and grade at the invert of the pipe and the Contractor shall
exercise care in matching pipe joints for concentricity and compatibility. In no case shall
two pipes be joined together with ends having the maximum manufacturer’s tolerance.
The invert line may vary from the true line and grade within the limits stated to develop
uniformity, concentricity, and uniform compression of jointing material provided such
variance does not result in a reverse sloping invert. The limit of variance at the invert
elevation of the pipe shall be plus or minus ¾-inch for a completed, backfilled pipe.
Checking of the invert elevation of the pipe shall be done by remote operated CCTV
camera utilizing a ¾-inch measuring device (lead ball).
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7-08.3(3) Backfilling
Revise the second paragraph of this section to read:
Gravel Backfill for Pipe Zone (including Bedding): Pipe zone material shall be Crushed
Surfacing Top Course meeting the requirements of section 9-03.9(3), and shall be placed
and compacted in layers as designated by the City. With prior approval by the City
Engineer, suitable native material may be an acceptable alternate for pipe zone bedding
above the bottom of the pipe.
Trench Backfill: All longitudinal pipeline trenches (parallel to curb) may be backfilled full
depth above the pipe zone with native material (free of organic material, wood, rocks, or
pavement chunks larger than 6-inches in maximum dimension), unless otherwise directed
by the City of Pasco. Street crossings, transverse trenches, and other locations as
directed by the City of Pasco may be required to be backfilled full depth with imported
select backfill. Imported select backfill shall be crushed surfacing top course or crushed
surfacing base course meeting the requirements of section 9-03.9(3), placed and
compacted in layers.
Supplement this section with the following:
The City Engineer may require the use of Controlled Density Fill (CDF) for trench backfill
in certain circumstances. The requirements for CDF are set forth in CHAPTER 8, Section
8-30 of these Special Provisions.
Backfill above the pipe zone may be placed in horizontal lifts up to 18 inches with written
approval of the Engineer.
The Contractor shall be responsible for scheduling, conducting, and paying for all testing
required.
8-01 EROSION CONTROL AND WATER POLLUTION CONTROL
8-01.3(1) Construction Requirements
Supplement this section with the following:
Exposed and unworked soils shall be temporarily or permanently stabilized as soon as
practicable, unless otherwise approved by the City of Pasco. Contractor shall follow the
requirements in the most current publication of the Stormwater Management Manual for
Eastern Washington.
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CHAPTER 5 - WATER SYSTEM IMPROVEMENTS
GENERAL REQUIREMENTS FOR WATER SYSTEM IMPROVEMENTS
All extensions and additions to the City of Pasco’s domestic water system shall conform to the
Design and Construction Standards of the City of Pasco, the Washington State Department of
Health (DOH), American Water Works Association, and designed by a Civil Engineer currently
licensed by the State of Washington.
All new lots and developments shall be served by a public domestic water supply line to be
maintained by the City of Pasco and located adjacent to the lot or development site. The water
supply line shall be capable of providing sufficient flow and pressure to satisfy the fire flow and
domestic service requirements of the proposed lots and development requirements. If determined
necessary by the City Engineer, hydraulic analysis including modeling shall be performed by the
City or its agents, and all costs shall be borne by the Developer.
Water lines shall be extended by the Developer to the point where the adjoining property owner’s
responsibility for further extension begins. This typically requires an extension across the entire
frontage of the property to the property line of the adjoining owner. In some cases, it will require
dedication of an easement and a line extension across the property or extension across two or
more sides of the developing property. Extensions will be consistent with and implement the
City’s adopted Water System Plan.
All new public domestic water mains shall be a minimum diameter of 8 inches, or larger diameters
as specified in the City’s Water System Plan or lager as required to meet the fire flow demand of
the development. Fire hydrant runs less than 50 feet from the water main to the fire hydrant shall
be a minimum diameter of 6 inches. Cover over new watermains shall be a minimum depth of 42
inches and a maximum of 72 inches.
New water mains shall be located in existing or proposed streets within City right-of-way and shall
be offset from the street centerline, not located within a vehicle wheel path.
Larger public water mains may be required depending upon fire flow requirements as determined
by the City and City Engineer.
All domestic water mains shall be looped, where possible, as determined by the City Engineer.
Temporary dead-end mains over 300 feet in length will only be allowed where future water main
looping via public right of way will be assured. No permanent dead-end water mains over 300
feet in length will be allowed to be part of the City of Pasco’s public water system.
Permanent dead-end water mains may become private water mains owned and maintained by
the Developer. All dead-end water mains shall be isolated from the public water main with a
reduced pressure double check valve assembly and vault furnished and inst alled by the
Developer in accordance with the City of Pasco Cross-Connection Control Policy. All services
must extend from a water main owned and operated by the City.
The Cross-Connection Control Policy requires all commercial/industrial properties to have a
reduced pressure backflow assembly (RPBA) for premises isolation of the building water supply.
Backflow prevention assemblies shall be installed at the water meter and shall be shown on the
plans. Required backflow prevention assembly types shall be as specified in Section 170 of the
City’s Policy. Yearly test reports shall be provided to the City’s Water Quality Inspector. The
backflow device shall be on the state approved list, available through the Washington State Dept.
of Health.
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All double detector check valve assemblies shall conform to City of Pasco standards. Initial and
annual testing will be required at the expense of the property owner.
Maximum valve spacing in public water mains will be 750 linear feet. Valves shall be installed on
all legs of new water main intersections. Valve operating nut extensions approved by the City will
be required on valves where the operating nut is deeper than 36 inches below finished grade.
All new water main installations shall be satisfactorily tested per Section 7-09 prior to being placed
into service including hydrostatic pressure and bacteriological testing, all at the expense of the
Developer.
All new water service lines shall be a minimum of 1-inch, for 3/4- and 1-inch meters. The
Developer/Contractor shall furnish and install all water service components (except hot tap and
water meter) from the water main to the property line including service saddle, corporation stop,
service pipe, meter stop, meter check valve, customer piping, and meter box, all at the
Developer’s expense. Only one meter shall be served from each main tap. All service hot taps
shall be made by the City of Pasco Public Works Crews.
All hot taps of water mains 12” and smaller shall be performed by City of Pasco Public Works
Crews or a contractor approved by the City Engineer, using a full circle stainless steel tapping
sleeve with gate valve. The contractor shall provide traffic control, excavate the connection
location, provide adequate sloping/shoring, and install tapping sleeve and valve prior to City Crew
arrival. No cut-in tees will be allowed on 6” and larger connections unless approved by the City
Engineer. If water main is less than 6-inch diameter, a cut-in tee shall be required. All work
(including City Crew tap) will be at the expense of the Developer.
Minimum 2-inch air and vacuum release valves shall be furnished and insta lled at high points in
the water system.
Maximum spacing of fire hydrants shall be 500 feet, on alternating sides of the street, and shall
be located at intersections. Additional hydrants may be required to protect structures as
determined by the Fire Chief and City Engineer. Additional fire hydrants required on a site may
require a looped, on-site water main. Easements shall be provided for all on-site, public, looped
water mains, in accordance with CHAPTER 1, Section 11. Fire hydrants shall be located at the
ends of curb returns or at property lines between lots, and not be located within driveways,
driveway ramps, or handicap ramps.
When additional fire hydrants are required or the required fire flow of a new site is greater than
the existing fire flow capacity, the public water main shall be extended and looped around the site,
reconnecting to the public distribution supply main, at the Developer’s expense. Fire hydrants
shall be located along the looped public water main as determined by the Fire Chief. The looped
water main will remain public and will not require check valves. The looped water main shall be
located within an easement centered on the water main, free of any other parallel-aligned private
utilities, see CHAPTER 1, Section 11. All water main components shall be located within the
easement including valves, hydrants, thrust blocks, fittings, etc. such that the City can maint ain
the public utility.
City-approved backflow prevention devices are required on all fire line connections to public water
mains when the line is not required to be looped.
Where the water system pressures are outside of acceptable ranges as identified in the City’s
Water System Comprehensive Plan, a pressure reducing valve (PRV) station may be required as
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determined by the City Engineer. The PRV station shall be designed by a Civil Engineer currently
licensed by the State of Washington and shall be submitted to the City for review. All costs for
design, review, approval, procurement, installation, and construction shall be borne by the
Developer, see PRV section below.
Water mains installed beneath railroad tracks, State highways, irrigation canals, building
structures, etc. shall be encased in a continuous welded steel casing (or as approved by
permitting agencies) and provided with casing spacers in accordance with these Standards.
Requirements by other agencies involved in crossings shall supersede these Standards.
Water mains shall maintain a 10-foot horizontal and 18-inch vertical separation above non-potable
pipelines (sanitary sewers, reclaimed water, irrigation pipelines, stormwater pipes, and other
uses) in accordance with Section 8.4.4 of the Water System Design Manual, December 2009, by
the Washington State Department of Health. Additionally, water and sewer mains shall be
separated in accordance with Section C1-9.1 of the Criteria for Sewage Works Design, August
2008, by the Washington State Department of Ecology. Gas, power, telephone, and other dry
utilities shall maintain a minimum 3-foot horizontal clearance from water mains.
The design of water mains and appurtenances is subject to review and approval consideration by
the City of Pasco Public Works Director and City Engineer. The Public Works Director may, at
his discretion, adjust these Design and Construction Standards as necessary to facilitate
installation of water lines and appurtenances for the health, safety, and prot ection of the general
public.
New water systems shall be placed in service, including all successful testing, prior to placement
of asphalt.
Irrigation Systems
Where the City of Pasco Irrigation Water Utility is available and /or as determined by the City
Engineer, new subdivisions and developments shall be served by a separate irrigation water
distribution system with an individual service for each lot. The irrigation system shall be designed
by a professional engineer and constructed in accordance with applicable City of Pasco
Construction Standards. All new public irrigation mains shall be a minimum diameter of 8 inches,
or larger diameters as required by the City of Pasco. In the event irrigation water is not available
in the vicinity of the subdivision, the irrigation system shall be tested, sealed, and buried with ends
clearly marked to facilitate a connection when irrigation water is available. Refer to Section 8-03
for material requirements.
Domestic water and non-potable irrigation services should be extended to opposite lot corners in
new construction. Where it is impossible to install them in that manner, 10-feet of separation
needs to be supplied between the service points (meter boxes).
Pressure Reducing Valve (PRV) Stations
The City’s Water System Comprehensive Plan and Irrigation Masterplan define the minimum and
maximum pressures admissible in the system. In locations not covered by the Plan, the City may
determine a study is necessary to determine a development’s impacts on the system, at the
expense of the Developer. The topography of the service area dictates the division of the water
system into different pressure zones. PRVs are needed where connections between different
pressure zones are proposed or required for the extension of the water system. PRVs are deemed
necessary when otherwise the potable water or irrigation water would be delivered at pressures
non-compliant with the established threshold.
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When a PRV is deemed necessary by the City, the Developer shall be responsible for providing
a design in accordance with the City’s Water System Comprehensive Plan and City Standards.
Said design will be reviewed by the City Engineering Department as part of the development plan
review process.
The PRV design and all associated flow calculations and thrust block/restraint calculations must
be performed by a Professional Engineer licensed in the State of Washington.
The PRV design must comply with the following criteria:
• All necessary calculations and drawings for any related design shall be submitted to the
City for approval. Calculations of flow must be performed by the Developer’s engineer
based on the Peak Hourly Demand (PHD), plus provisions for required fire flow.
• Pressure zones must adhere to the provisions included in the Comprehensive Plan and
Masterplan for the respective utility.
• All PRVs will be placed in vaults that are large enough to provide ample work space for
field inspection and valve repair.
• Vaults shall be designed with a gravity drain or sump pump into an adjacent drainage
structure, to prevent vault flooding.
• Pressure relief valves will be considered for closed pressure zones to prevent over
pressurization if a PRV fails in the open position. A pressure relief valve can be
incorporated into the PRV Package Station or can be design in stand-alone configuration.
Pressure relief valves shall feature full flow piping to a turned down riser 18” to 36” above
ground, for visible detection of relief flow. Relief flow shall be routed to a nearby retention
basin of appropriate size.
• The pressure reducing valve shall be set to open at any pressure below its preset setpoint
and to close at any pressure above an adjustable deadband, to maintain downstream
pressure within 2.5 psi of the pressure setpoint. Downstream pressure control shall not be
based on changing upstream pressures. Valve shall be provided with a valve position
indicator assembly.
• The upstream pressure shall be sustained at a predetermined minimum, to be established
by the City.
SPECIAL PROVISIONS FOR WATER SYSTEM IMPROVEMENTS
The following sections of the WSDOT Standard Specifications have been amended or
supplemented as described below and apply to the construction of public works water system
improvements within the City of Pasco.
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7-09 WATER MAINS
7-09.2 Materials
Pipe for main line approved for use shall be as follows:
Pipe for Main Line:
Ductile Iron Pipe
Supplement this section with the following:
Ductile Iron Pipe: Ductile iron pipe shall conform to the requirements of Section 9-30.1(1)
of the Standard Specifications, except that it shall be Standard Thickness Class 52. Joints
shall be rubber gasket, push-on type (Tyton Joint). Fittings shall be mechanical joint or
flanged, as shown on the Plans, and shall conform to Section 9-30.2(1) of the Standard
Specifications and NSF 61.
Tracer Wire: Tracer wire shall be 12-gauge heavy insulated (60 mil) copper wire with UF
insulation colored for the utility being installed in accordance with Section 9-15.18. Direct
bury splice kits shall be 3M DBY-6.
Fittings for Main Lines:
Fittings: Fittings shall be cement lined, ductile iron, rubber gaskets and glands, and bolts
meeting the requirements of AWWA C110, C111, or C153. Fittings shall comply with NSF
61 requirements.
Hardware: Bolts and studs shall be carbon steel, grade B meeting the requirements of
ASTM A 307 and nuts meet the requirements of ASTM A 563.
Lubricant: Lubricant shall be nontoxic and water-soluble.
Aggregates:
See Section 7-08.3 of these Specifications.
7-09.3 Construction Requirements
7-09.3(5) Grade and Alignment
Replace the first sentence of the third paragraph with the following:
The depth of trenching for water mains shall be such to provide a minimum cover of 42
inches and a maximum cover of 72 inches, unless otherwise approved by the City
Engineer.
7-09.3(7) Trench Excavation
Supplement this section with the following:
The Contractor shall neatly sawcut all areas of existing pavement within the trench
excavation area, then remove and haul all waste materials from the project and dispose
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of at an approved site provided by the Contractor. Should any undermining occur on
adjacent pavement, the Contractor shall neatly cut the pavement six (6) inches beyond
the undermined area.
All trench excavations shall have adequate safety systems for the trench excavation that
meet the requirements of the Washington Industrial Safety and Health Act, Chapter 49.17
RCW. The Contractor shall be fully responsible for providing the necessary back sloping,
cribbing, trench boxes, etc., as required to meet the specified safety requirem ents for the
trench. When City crews will be making the main line taps or other work in the trench, the
Contractor shall provide all trench safety measures, prior to City personnel entering the
trench.
7-09.3(9) Bedding the Pipe
Supplement this section with the following:
All construction work shall be inspected by the City or its representative before pipe
installation and backfilling.
7-09.3(11) Compaction of Backfill
Delete the first paragraph and supplement this section with the following:
Mechanical compaction shall be required for all trenches. The Developer/Contractor shall
be responsible for scheduling and paying for all testing required.
The density of the compacted material shall be at least 95% of the maximum density as
determined by ASTM D 698 Tests (Standard Proctor). Density tests shall be taken at
various depths in the trench. All costs associated with testing shall be the responsibility of
the Contractor. Placement of courses of aggregate shall not proceed until density require-
ments have been met.
The first 500 feet of trench backfill operations shall be considered a test section for the
Contractor to demonstrate his backfilling and compaction techniques. The Contractor shall
notify the City at least 3 working days prior to beginning trench excavation and backfill
operations. The Contractor shall arrange for in-place density tests to be taken on the
completed test section in accordance with the above require ments. No further trenching
will be allowed until the specified density is achieved in the test section. Passing in-place
density tests in the test section will not relieve the Contractor from achieving the specified
densities throughout the project.
At locations where paved streets, roadway shoulders, driveways, or sidewalks will be
constructed or reconstructed over the trench, the backfill shall be spread and compacted in
layers to achieve specified density requirements throughout the trench depth, by means
and methods as proposed by the Contractor.
7-09.3(15)A Ductile Iron Pipe
Revise the first paragraph of this section to read:
Long radius curves, either horizontal or vertical, may be laid with standard pipe lengths by
deflecting the joints. If the pipe is shown curved o n the Plans and no special fittings are
shown, the Contractor can assume that the curves can be made by deflecting the joints
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with standard lengths of pipe. If shorter lengths are required, the Plans will indicate
maximum lengths that can be used. The amount of deflection at each pipe joint when pipe
is laid on a horizontal or vertical curve shall not exceed one-half (1/2) of the manufacturer’s
printed recommended deflections. If the deflection required to maintain the line shown on
the approved construction drawings exceeds 1/2 of the manufacturer’s printed
recommended deflection, then the contractor shall utilize fittings to maintain the approved
line. Additional labor and materials will be at the developer’s expense.
7-09.3(19)A Connections to Existing Mains
Delete the third paragraph of Section 7-09.3(19)A in its entirety.
Supplement this section with the following:
Requests for water line shutdowns and water taps shall utilize the City of Pasco Procedure
for Scheduling Water Crews, Performing Taps, and Placing New Water Lines in Service.
New water mains shall be tested, flushed, and disinfected per Section 7-09.3(23) and 7-
09.3(24) with passing results, prior to making connection to existing main and being placed
into operation.
No existing line valves shall be closed without permission by the City. In no case shall any
existing water main valve be closed for a period of greater than eight (8) hours.
The anticipated schedule for the connections shall be discussed and scheduled at the
preconstruction conference, and indicated on the weekly schedule. The City reserves the
right to adjust the schedule of the connections, as required, subject to a minimum of 24
hour notice of schedule change to the Contractor. No connections will be scheduled for the
first working day after a weekend or holiday.
Revise the title of Section 7-09.3(20) to read:
7-09.3(20) Detectable Marking Tape and Tracer Wire
Delete this section and replace it with the following:
Detectable marking tape and tracer wire shall be installed over all water lines, including
service lines. The tape shall be placed approximately 2-feet above the top of the line and
shall extend its full length. The tracer wire shall be fastened to the top of the pipe with duct
tape at 6-foot intervals and shall be routed up into valve boxes with adequate length for
connection to location equipment.
7-09.3(21) Concrete Thrust Blocking
Supplement this section with the following:
Thrust blocks shall be formed and placed in conformance with the City of Pasco Standard
Details for the appropriate pipe size and fitting type.
Mechanically restrained pipe and fittings may be used in lieu of thrust blocking. The
Engineer shall provide appropriate restraint calculations, indicting the length of pipe and
fittings to be restrained for each particular diameter and type of fitting to be installed. Thrust
restraint calculators such as those provided by Ductile Iron Pipe Research Association,
EBAA Iron, or similar may be used to determine required restraint lengths.
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7-09.3(22) Blow-off Assemblies
Supplement this section with the following:
All permanent dead-end lines must end with a blow-off, unless there is a hydrant
connection within the last 30 feet of the water main.
7-09.3(23) Hydrostatic Pressure Test
Delete this section and replace it with the following:
Water main appurtenances and service connections to the meter setter shall be tested in
sections of convenient length under a hydrostatic pressure equal to 150 -psi. Pumps,
gauges, plugs, saddles, corporation stops, miscellaneous hose and piping, and measuring
equipment necessary for performing the test shall be furnished and operated by the
Contractor.
Sections to be tested shall normally be limited to 1,500 feet. The Engineer may require that
the first section of pipe, not less than 1,000 feet in length, installed by each of the
Contractor’s crews, be tested in order to qualify the crew and the materials. Pipe laying
shall not be continued more than an additional 1,000 feet until the first section has been
tested successfully.
The pipeline shall be backfilled sufficiently to prevent movement of the pipe under pressure.
Mechanical restraints and/or thrust blocks shall be in place and time allowed for the
concrete to cure before testing. Where permanent blocking is not required, the Contractor
shall furnish and install temporary blocking and remove it after testing.
The mains shall be filled with water and allowed to stand under pressure a sufficient length
of time to allow the escape of air and allow the lining of the pipe to absorb water. The
Contracting Agency will furnish the water necessary to fill the pipelines for testing purposes
at a time of day when sufficient quantities of water are available for normal system
operation.
The test shall be accomplished by pumping the main up to the required pressure and
stopping the pump and holding pressure for one (1) hour. During the test, the section being
tested shall be observed to detect any visible leakage.
There shall not be a loss in pressure during the one-hour test period.
Pressure gauges used in the test shall be in good working condition and have a zero-
pressure reading prior to use. Erroneous or damaged gauges may be rejected at the
discretion of the Engineer and shall be replaced with new gauges at the Contractor’s
expense.
Any visible leakage detected shall be corrected by the Contractor. Should the tested
section fail to meet the pressure test successfully as specified, the Contractor shall, at no
additional expense to the Contracting Agency, locate and repair the defects and then retest
the pipeline.
Tests shall be made with the hydrant auxiliary gate valves open and pressure against the
hydrant valve. Each valve shall be tested by closing each in turn and relieving the pressure
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beyond. This test of the valve will be acceptable if there is no immediate loss of pressure
on the gauge when the pressure comes against the valve being checked. The Contractor
shall verify that the pressure differential across the valve does not exceed the rated working
pressure of the valve.
Prior to calling out the Engineer to witness the pressure test, the Contractor shall have all
equipment set up completely ready for operation and shall have successfully performed the
test to ensure that the pipe is in satisfactory condition.
Defective materials or workmanship, discovered as a result of hydrostatic field test, shall
be replaced by the Contractor at no expense to the Contracting Agency. Whenever it is
necessary to replace defective material or correct the workmanship, the hydrostatic test
shall be re-run at the Contractor’s expense until a satisfactory test is obtained.
7-09.3(24) Disinfection of Water Mains
Supplement this section with the following:
AWWA Standard C651 shall be used as a guideline for disinfecting water mains.
7-09.3(24)J Preventing Reverse Flow
Supplement this section with the following:
All water lines shall be pressure tested and sanitized with a satisfactory report received
from the Washington State Department of Health prior to the backflow assembly installation.
Backflow preventers shall NOT be pressure tested against.
7-09.3(24)K Retention Period
Revise this section to read:
Treated water shall be retained in the pipe at least 24 hours but not more than 28 hours.
After the 24-hour period, the chlorine residual at pipe extremities and at other representative
points shall be at least 25 mg/l.
7-12 VALVES FOR WATER MAINS
7-12.2 Materials
Supplement this section with the following:
Gate Valves: All valves sizes 2-inch through 10-inch shall be resilient wedge gate valves
with ductile iron bodies and shall conform to the latest revision of AWWA Resilient Seated
Gate Valves Standard C515 and AWWA C104.
All gate valves shall have non-rising stems, open counterclockwise, and shall be provided
with a 2-inch square AWWA operating nut.
Butterfly Valves: All valves sizes 12 inches and larger shall be butterfly valves suitable for
direct burial and shall be rubber seated and conform to the latest revision of AWWA
Standard C504 Class 150B and C104. All valves shall open counterclockwise and shall
be provided with a 2-inch square AWWA operating nut.
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Valves shall be of the same size as the line on which they are located.
Tapping Sleeve and Valve Assemblies: Tapping sleeves shall be full circle stainless steel
with ductile iron flanged outlet, conforming to the latest AWWA Standard C223. Tapping
gate valves shall meet the requirements for Gate Valves in Section 7-12.2. The following
stainless steel tapping sleeves are approved for use: Ford FAST style, Romac model
SST, and Smith-Blair.
Valve Boxes: Valve boxes shall be two-piece adjustable, Olympic Foundry model 931.
Combination Air Release/Air Vacuum Valves: Valves shall meet the requirements of C512
and shall be APCO 146.
7-12.3 Construction Requirements
Supplement this section with the following:
Tapping Sleeve and Valve Assemblies: City of Pasco Public Works will perform all taps for
tapping sleeve and valve assemblies up to 12-inch diameter, sleeve and valve to be
installed by the Contractor. For taps greater than 12-inch diameter, the Contractor or
Subcontractor completing the work shall have at least five (5) years’ experience with a
minimum of ten (10) water main taps of pipes with diameters equal to or larger than that
specified. Contractor shall notify City at least 72 hours prior to proposed taps and provide
work experience references if requested. Work to complete the tap shall not com mence
without City’s written approval. If the Contractor or Subcontractor does not have sufficient
experience in the sole opinion of the City, a qualified Subcontractor as approved by the
City, shall be used to complete the tap at no cost to the City.
Valves: Upon completion of all work, the Developer/Contractor shall contact the City of
Pasco Public Works for opening water valves. Valves shall only be operated by City Public
Works staff.
Valves shall not be installed in Sidewalks, Pedestrian Curb Ramps, Driveway Approaches
or any other exposed concrete surface.
Valve Boxes: Valve boxes should be set to position during backfilling operations so they
will be in a vertically centered alignment to the valve operating stem. The top of the box
will be at final grade.
The Contractor shall adjust all water valve boxes to the final grade of the surrounding area
including new concrete sidewalk, asphalt paving, gravel surfacing, or topsoil surfacing, in
accordance with the details shown on the Drawings.
The Contractor shall keep the valve boxes free from debris caused by the construction
activities. All valve boxes will be inspected during final walk-thru to verify that the valve box
is plumb and that the valve wrench can be placed on the operating nut. Misaligned valve
boxes shall be excavated, plumbed, and backfilled at the Contractor's expense.
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7-14 HYDRANTS
7-14.2 Materials
Supplement this section with the following:
All hydrants shall be dry-barrel, compression type, with a Main Valve Opening (MVO) of
5-1/4" and suitable for working pressures up to 150 psi meeting the requirements of C502.
Hydrants shall have a 1-1/2” pentagon operating nut, opening left. All hydrants shall
include a 5”x4-1/2” NH connector and cap, Storz HPHA50-45NH and HBC-50. Threads
on all ports shall be National Standard Thread.
Approved manufacturers include Mueller (Centurion), Clow (Medallion), and Waterous
(Pacer WB-67).
7-14.3(1) Setting Hydrants
Delete the first and second paragraphs and replace with the following:
The hydrant shoe shall be set to the correct elevation on a concrete block base, which has
been placed on undisturbed earth. Around the base of the hydrant and weep hole, the
Contractor shall place washed drain rock, to allow free drainage of the hydrant. The drain
rock shall be completely surrounded with construction geotextile filter fabric.
The contractor shall set all hydrants plumb and nozzles parallel with, or at right angles to,
the curb, with the pumper nozzle facing the curb. Hydrants shall be set so that the flange
is 2”-8” above the back of curb, sidewalk, or finished grade to clear nuts and bolts.
Hydrants shall be ordered with the bury depth required to meet the flange elevation
requirements. The Contractor shall be responsible for verifying the hydrant flange
elevations and no extensions will be allowed.
Fire hydrants shall be painted with two coats of high visibility yellow paint.
Fire hydrants shall be located 1-foot behind the back of sidewalk to the face of hydrant
where the sidewalk is adjacent to the curb and 7-feet behind the back of curb where the
sidewalk is not adjacent to the curb. Hydrants adjacent to roadside swales shall be located
1-foot behind the swale on the property line side.
No bends are allowed in fire hydrant runs. If a bend cannot be avoided, the elbow fittings
shall be mechanically restrained with EBAA Megalugs or approved equal.
Hydrants installed outside of paved areas where there will not be maintained landscaping
shall install a 4’ x 4’ concrete pad around the hydrant.
7-14.3(2) Hydrant Connections
Replace this section with the following:
Hydrant runs of less than 50 feet shall be connected to the main wit h 6-inch minimum
diameter water main. Each hydrant lateral shall include an auxiliary gate valve and valve
box.
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7-14.3(2)A Hydrant Restraints
Replace this section with the following:
All hydrants shall be securely connected to the water main as shown on the City’s
Standard Detail, and each joint shall be mechanically restrained.
7-14.3(2)C Hydrant Guard Posts
Replace this section with the following:
The City Engineer may determine that four (4) 6-inch diameter Sch. 40 steel guard posts
shall be installed at a hydrant location. Hydrant guard posts shall be painted the same
color as the hydrants.
7-15 SERVICE CONNECTIONS
7-15.1 Description
Replace this section with the following:
All new water service lines shall be a minimum of 1-inch, for 3/4- and 1-inch meters, and
shall conform to the City Standard Detail. The Developer/Contractor shall furnish and
install all water service components (except hot tap and water meter) from the water main
to the property line including service saddle, corporation stop, service pipe, meter stop,
meter check valve, customer piping, and meter box, all at the Developer’s expense. Only
one meter shall be served from each main tap. All service hot taps shall be made by the
City of Pasco Public Works Crews.
7-15.2 Materials
Supplement this section with the following:
All fittings shall be lead free.
Service Saddles: New service saddles less than 12” diameter shall meet the requirements
of AWWA C800 and have CC threads. Approved manufacturers include Romac (202S,
101S), Mueller DS2S, McDonald (384x, 382x), and Smith-Blair (315, 317). New service
saddles 12” and larger shall meet the requirements of AWWA C800 and have CC threads.
Approved manufacturers include Romac (305, 306).
Corporation Stops: New 1” corporation stops shall be Ford FB1000, Mueller B-25008N,
B-20013N, or McDonald 74701B. New 2” corporation stops shall be Ford FB400(CC),
FB500(IP), Mueller B-2996N(CC), H-2969(IP), or McDonald 74701B .
Service Pipe: New service pipe shall be copper per Section 9-30.6(3)A. Approved service
pipe manufacturers include Cerro, Muller, and Cambridge Lee.
Service Pipe Fittings: New copper to copper fittings shall be compression type Ford C-
44, Mueller H-15403, and McDonald 4758-22. Grip fittings are not acceptable.
Locating Wire: Locate wire shall meet the requirements of Section 7-09.3(12)A and be
continuous from the water main to the meter box. Locating wire shall be 12-gauge heavy
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insulated (60 mil) copper wire with UF insulation colored for the utility being installed in
accordance with Section 9-15.18. Direct bury splice kits shall be 3M DBY-6.
Meter Angle Valve: New 1” compression valve shall be Ford BA43, Mueller B-24258N, or
McDonald 74602B. New 2” threaded valves shall be Ford BFA13, Mueller B-24286N, or
McDonald 74604B.
Meter: New 3/4” to 2” meters shall meet the requirements of AWWA C700. Approved
meters shall be any of the following: Badger (LP35, LP55, LP120), Neptune (T-10,
Tru/Flo), and Sensus (SRII, SRH).
Meter Check Valve: New 1” compression valve shall be Ford HA34 or Mueller H-14269.
New 1-1/2” and 2” threaded valves shall be Ford HFA31.
Thread Sealant: Thread sealant shall be used on all threaded pipe fittings. Approved
manufacturers include Spears Blue 75, Whitlam Blue Magic, and Teflon Tape.
Meter Boxes (3/4” to 2” meters): New meter boxes shall be Raven RMB 1324-18 or
Carson HW Model 1324BCF-18 with 1324R reader lid (3/4” and 1” meters) and Raven
RMB 1730-18 or Carson HW Model 1730BCF-18 with 1730R reader lid (1-1/2” and 2”
meters).
Backflow Assembly Box (3/4” to 2”): New assembly box shall be Carson 1220 and 1324
(3/4” and 1”) and Carson 1730 (1-1/4” to 2”), meeting inside dimension tolerances
specified on Details.
Meter Vault (3” to 8” meters): New precast cement concrete vault shall be Oldcastle
Precast or H2 Precast meeting inside dimension tolerances specified on Details and shall
have diamond plate spring assisted cover with locking latch inside (332P cover).
Backflow Assembly Vault: New precast cement concrete vault shall be Oldcastle Precast
or H2 Precast meeting inside dimension tolerances specified on Details, and shall have
diamond plate spring assisted cover with locking latch inside (332P for 2” to 3”, 2-322P for
4” to 6”, and 3-322P for 8” to 12”). Contractor/Developer shall provide to the City Inspector
any factory tools, keys, or wrenches required to open vault lid.
Vault Ladder: Ladders installed in vaults shall include a Bilco LadderUp safety post, model
LU-2, LU-3, or LU-4.
Pipe Bedding and Backfill: Pipe bedding and select backfill shall be utilized for trench
backfill as directed by the City in accordance with Section 7-09.2 of the Special Provisions.
7-15.3 Construction Requirements
Supplement this section with the following:
The Contractor shall set the water meter box to the finished grade of the area, typically
flush with the top back of sidewalk. The Contractor will be required to reset the meter box
if it is not at finished grade at the completion of the project. The completed water service
shall be tested at system operating pressure by the Contractor and must show no signs
of leakage.
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The location of water services at the property line or easement line shall be marked per
the Standard Detail. Fiberglass markers may be proposed for approval consideration by
the City Engineer.
The fresh concrete curb above all water service lines shall be stamped on the curb face
with a 2" high "W".
Service saddle shall not be placed within one (1) foot of pipe joint, couplings, or other
clamps without approval from the Engineer.
No joints are allowed between the corporation stop and the angle meter stop.
8-03 IRRIGATION SYSTEMS
Supplement this section with the City of Pasco Irrigation Standards.
8-03.2 Materials
Supplement this section with the following:
Pipe for main line approved for use shall be as follows:
Pipe for Main Line:
All irrigation pipelines under roadways shall meet the requirements of Section 9-30.1
(Ductile Iron) or Section 9-30.1(5)A (AWWA C900). Fittings shall be cast or ductile iron.
All irrigation pipe shall be installed with a minimum cover of 30 inches, and pipe zone
bedding and backfill per Section 7-09.2.
Supplement this section with the following:
Meter Angle Valve: New meter angle valve shall have 3/4"x3/4” with iron pipe threads and
padlock wings, Ford BA11-333WNL or A.Y. McDonald 74604BF.
Irrigation Service Box: New irrigation service box shall be Carson L-1220-12 (green) with
T-Cover 1220-4.
Isolation Valve (3/4” to 2”): New isolation valves shall be lead free curb stops. Approved
valves shall be any of the following:
Ford:
FIPxFIP
B11-333-NL (3/4”)
B11-44
4-NL (1”)
B11-666-NL (1-1/2”)
B11-777-NL (2”)
CTSxPEP
B46-333-NL (3/4”)
B46-444-NL (1”)
B46-666-NL (1-1/2”)
B46-777-NL (2”)
Mueller:
300 Ball Curb Stop
A.Y. McDonald:
76101NL
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Backflow Assembly Isolation Valve Box: New valve box shall be Carson 708 TrussT (3”
to 4”) and Carson 910 Spec Grade (6” and larger).
Irrigation Spigot: New spigot shall be a bronze, THD, NRS gate valve, NIBCO Class 125
T113.
Backflow Assembly Above Ground Enclosure: Enclosures shall be provided for freeze
protection. Acceptable enclosures include Aquashield, Watts Safe-T-Cover, and Hot Box
(fiberglass, stainless steel, ornamental rock, and ornamental stump).
Tracer Wire: Tracer wire shall be 12-gauge heavy insulated (60 mil) copper wire with UF
insulation colored for the utility being installed in accordance with Section 9-15.18. Direct
bury splice kits shall be 3M DBY-6.
9-15 IRRIGATION SYSTEMS
Supplement this section with the City of Pasco Irrigation Standards.
9-15.18 Detectable Marking Tape
Revise this section to read:
Detectable marking tape shall consist of inert polyethylene plastic that is impervious to all
known alkalis, acids, chemical reagents, and solvents likely to be encountered in the soil,
with a metallic foil core to provide the most positive detection and pipeline location.
The tape shall be color coded and shall be imprinted continuously over its entire length in
permanent black ink. The message shall convey the type of line buried below and shall
also have the word “Caution” prominently shown. Color coding of the tape shall be as
follows:
Utility Tape Color
Water Blue
Sewer Green
Electrical Red
Gas/Oil Yellow
Telephone/CATV Orange
Irrigation Purple
Tape width and placement shall meet the requirements Sections 7-08.3(2)B Pipe Laying
– General.
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Pasco Design and Construction Standards Chapter 6 - Sanitary Sewer System Improvements
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CHAPTER 6 - SANITARY SEWER SYSTEM IMPROVEMENTS
GENERAL REQUIREMENTS FOR SANITARY SEWER SYSTEM IMPROVEMENTS
All extensions and additions to the City's sanitary sewer system shall conform to the Design and
Construction Standards of the City of Pasco, the Washington State Department of Ecology, and
designed by a Civil Engineer currently licensed by the State of Washington.
All sanitary sewer improvements shall be designed in accordance with the Washington state
Department of Ecology’s Criteria for Sewage Works Design (Orange Book).
All new lots and developments shall be served by a public sanitary sewer line adjacent to the lot
or development site.
Sewer lines shall be extended by the Developer to the point where the adjoining property owner’s
responsibility for further extension begins. This typically requires an extension across the entire
frontage of the property to the property line of the adjoining owner. In some cases, it will require
dedication of an easement and a line extension across the property or extension across two or
more sides of the developing property. Extensions will be consistent with and implement the
City’s adopted General Sewer Plan, including alignments, sizes, and depths necessary to serve
future areas within the Urban Growth Area (UGA) boundary.
Sewer lines shall be located in streets to serve abutting properties. Lines located in streets will
be offset from the street centerline and not located within a vehicle wheel path. When necessary,
sewer lines may be located within public easements, see CHAPTER 1, Section 11. Sewer lines
located in easements shall generally be located in the center of the easement, but may, with the
approval of the City Engineer, be offset to accommodate the installation of other utilities or to
satisfy special circumstances.
The minimum size for public sewer lines is eight (8) inches in diameter. The developer’s sewer
system must provide capacity for the proposed development but must also provide capacity for
future extensions consistent with the General Sewer Plan.
Manholes shall be installed at intervals of no greater than 400 feet and at all vertical and horizontal
angle points in the sewer main. Curved or deflected pipelines will not be permitted. Sewer lines
shall be terminated with a manhole. In special circumstances, a flush-end (cleanout) may be
installed on the end of a sewer main extension, provided the end is no further than 150 feet from
the last manhole and the sewer main line and grade will permit further extension.
Sewer mains generally should not exceed a slope of 5%, unless site constraints require steeper
slopes. Should the sewer main slope exceed 5%, the Developer’s Engineer shall provide
calculations to determine if energy dissipaters and/or pipe restraints are necessary. The City
Engineer will make the final determination if dissipaters and restraints are required. Sewer mains
with a slope of 20% or greater shall be secured with concrete anchors, with spacing requirements
determined by the City Engineer.
All new sewer line installations shall be satisfactorily tested and inspected per Section 7-17 prior
to being placed into service including low pressure air and deflection testing, and television
inspection, all at the expense of the Developer.
Each building containing sanitary sewer facilities shall be served by a separate private side sewer
line. Branched side sewers serving multiple buildings and properties shall not be permitted. A
single side sewer serving multi-unit buildings is permitted.
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Sewer services to residential single-family lots shall be 4-inch diameter, and commercial
properties shall be a minimum of 6-inch diameter.
Side sewers services shall be installed in accordance with these Construction Standards and as
shown on the City Standard Details. Water service and side sewer service lines shall not be laid
in the same trench, except if approved materials (those listed in Section 7 -17.2 of the Standard
Specifications for Road, Bridge, and Municipal Construction) are used and the following
requirements are met:
1. The bottom of the water pipe shall not be less than 12 inches above the top of the sewer
or drain line.
2. The water pipe shall be placed on a solid shelf excavated at one side of the common
trench with a clear horizontal distance of not less than 12 inches from the sewer or drain
line.
Side sewers shall extend 10-feet beyond the right-of-way and the pipe end shall be capped and
marked for future connection. Services shall be located a minimum of 10-feet from water services
and on the low side of the lot.
Sewer lines shall be designed for gravity flow operation and in accordance with the General Sewer
Plan.
Sewer force mains may be necessary in specific City locations as determined by the City
Engineer. Lift stations and force mains shall be limited to those locations and circumstances
where they are consistent with the General Sewer Plan and are the only viable solution to serve
the proposed development and other properties in the vicinity. Lift stations and force mains shall
be designed by a Professional Civil Engineer licensed in the State of Washington in accordance
with the direction and requirements given by the City Engineer, for review and approval by the
City of Pasco Public Works Director and City Engineer. Hydraulic analysis including modeling
shall be performed by the Developer’s Civil Engineer as determined necessary by the City
Engineer.
The design of sewer lines and appurtenances is subject to review and approval by the City
Engineer. The City Engineer may, at his discretion, adjust these Design and Construction
Standards as necessary to facilitate installation of sewer lines and appurtenances for the health,
safety, and protection of the general public.
SPECIAL PROVISIONS FOR SANITARY SEWER SYSTEM IMPROVEMENTS
The following sections of the WSDOT Standard Specifications have been amended or
supplemented as described below and apply to the constructio n of public works sewer system
improvements within the City of Pasco.
7-05 MANHOLES, INLETS, CATCH BASINS, AND DRYWELLS
7-05.2 Materials
Supplement this section with the following:
Manholes: Sanitary sewer manholes shall be constructed of 48-inch or larger diameter
reinforced precast concrete manhole sections in conformance with the requirements of
this Section. The base and first barrel section shall be precast monolithically with
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preformed channels. Manholes shall have a minimum depth of six (6) feet and include an
eccentric cone section with 24” opening.
A-Lok boot connectors or approved equal shall be provided for all inlets and outlets.
Joints in the manhole sections shall be watertight complying with ASTM C443 (confined
groove joint) or ASTM C990 (tongue and groove joint).
Adjustment Rings: Manhole adjustment rings shall be precast concrete. Approved
manufacturers include RADA, Inc., Reese Concrete, and Wilbert Precast, Inc.
Frames and Covers: Frames and covers shall be class 30 cast iron meeting the
requirements of ASTM A48. 24” round covers shall read “SEWER” and “CITY OF PASCO”
embossed in top (2” raised letters), cover weight 150 lbs, frame weight 185 lbs. Approved
manufacturers include East Jordan Iron Works (3705Z), D&L Foundry, Neenah Foundry,
and Olympic Foundry. When required by the City, locking covers shall be provided as
manufactured by East Jordan Iron Works (3704C) and D&L Foundry.
Mortar/Grout: Approved manufacturers include American All Patch 20, Jet Set Complete
Repair, and Target expanding non-shrink.
7-05.3 Construction Requirements
Supplement this section with the following:
The design and construction of all manholes shall provide for a 0.10-foot vertical drop
through the manhole.
7-05.3(1) Adjusting Manholes and Catch Basins to Grade
Delete and replace with the following:
Manholes, valve boxes, catch basins, and similar utility appurtenances and structures
shall not be adjusted until the pavement is completed, at which time the center of each
structure shall be relocated from references previously established by the Contractor. All
existing manhole castings shall be replaced with new castings at time of adjustment.
The asphalt concrete pavement shall be cut and removed to a neat circle, the diameter as
specified on the Standard Details. The frame shall be placed on cement concrete blocks
or adjustment rings and brought up to the desired grade. The base materials shall be
removed and Class 3000 cement concrete shall be placed to the depth specified on the
Standard Detail.
On the following day, a tack coat of asphalt shall be applied to the concrete, the edges of
the asphalt concrete pavement, and the outer edge of the casting. HMA CI. 3/8-Inch
asphalt concrete shall then be placed and compacted with hand tampers and a patching
roller.
The completed patch shall match the existing paved surface for texture, density, and
uniformity of grade. The joint between the asphalt patch and the existing pavement shall
then be sealed with emulsified asphalt and shall be immediately covered with dry paving
sand before the tack has broken.
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Utility appurtenances outside paved areas shall be adjusted to match the finish grade of
the area surrounding the structure. The utility cover shall be cleaned of all concrete prior
to acceptance.
7-05.3(2) Abandon Existing Manholes
Replace the entire section with the following:
Where shown on the Plans, existing sanitary sewer manholes shall be abandoned in place
after the new sanitary sewer collection system is in place and all side sewers have been
transferred to the new sanitary sewer pipeline.
At least the top three feet of each manhole, or the top conical section in precast concrete
manholes, shall be removed, including the cast iron ring and cover and concrete pad, if
any. Debris resulting from breaking of the upper portion of the manhole may be mixed
with backfill subject to the approval of the City Engineer. Ring and cover shall become
the property of the City and all other surplus material shall be disposed of by the
Contractor.
The existing pipe openings shall be plugged watertight with Class 3000 concrete and the
manhole bottom slabs shall be crushed to promote drainage. The remaining manhole
structure shall be backfilled with granular material conforming to Section 9-03.9(3)
Crushed Surfacing Base Course. Place backfill in uniform layers and compact to 95%
maximum dry density, as determined by ASTM D 698 (Standard Proctor).
Excavations resulting from manhole abandonment shall be backfilled with suitable, job-
excavated material to top of subgrade. Compact to 95% maximum dry density as
determined by ASTM D 698 (Standard Proctor). Restore surface to the condition existing
prior to excavation with native material, gravel surfacing, or asphalt concrete pavement,
as shown for trench repair on the Plans.
7-17 SANITARY SEWERS
7-17.1 Description
Supplement this section with the following:
The term “sewer(s)” and “sanitary sewer(s)” shall mean the same.
7-17.2 Materials
Supplement this section with the following:
Pipe approved for use shall be as follows:
PVC Sanitary Sewer Pipe (Gravity): Polyvinyl Chloride Pipe with flexible gasketed joints
(Ring-Tite) shall conform to the requirements of Section 9-05.12(1) of the Standard
Specifications (ASTM D3034, SDR 35 for pipe sizes up to 15 inches in diameter, and SDR
26 for all sewer pipe with any portion of the sewer main greater than 12 feet of cover).
When restrained pipe is required, Certa-Lok restraints shall be used.
PVC fittings for PVC sewer pipe such as tees, wyes, elbows, plugs, caps, etc., shall be
flexible gasket joint fittings acceptable for use and connection to PVC sewer pipe.
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Transition Coupling: Couplings shall be longitudinally bolted with gasketed joints.
Approved manufacturers include Romac, Dresser, Rockwell, Ford, and Smith-Blair.
Detectable Marker Tape: Marker tape shall be a detectable type and shall be marked
"SEWER," and shall conform to Section 9-15.18 of the Standard Specifications.
7-17.3 Construction Requirements
Supplement this section with the following:
Sanitary sewer mains shall be at least 8” in diameter. All dead-end runs longer than 200
feet shall terminate in a sanitary sewer manhole. Dead-end runs less than 200 feet long
may terminate with a clean out.
7-17.3(1) Protection of Existing Sewerage Facilities
Supplement this section with the following:
When connecting to an existing sewer, the downstream system shall be protected from
construction debris by placing a 90 degree, SRECO, UEMSI or equal “stove pipe” sand
trap, the same size as the sewer main line, in the first existing manhole downstream of the
connection. It shall be the Contractor’s responsibility to maintain this trap until the new
system is placed in service and then to remove it. Any construction debris, excavation or
backfill material which enters the existing downstream system shall be removed. When
the first manhole is set, the outlet shall be plugged until the entire system is accepted by
the Engineer.
7-17.3(2) Cleaning and Testing
7-17.3(2)A General
Delete the first paragraph and replace it with the following:
All sewer pipes and appurtenances shall be cleaned, and low-pressure air tested after
backfilling. Both infiltration (if applicable) and exfiltration testing of the gravity sewer
pipeline will be required. Deflection testing of the pipeline may be required should video
inspection review identify any irregularities or concerns at the discretion of the City
Engineer.
All testing shall be performed by the Contractor and witnessed by the City.
Supplement this section with the following:
Contractor shall keep the pipeline clean and free of debris. The pipeline shall be cleaned
prior to the contractor requesting inspections.
7-17.3(2)H Television Inspection
Delete the first paragraph and replace it with the following:
The costs incurred in making the initial inspection shall be borne by the Contractor.
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Supplement this section with the following:
All recordings shall be in color and in DVD format, playable on standard DVD players.
Television inspection shall begin at the downstream manhole and end at the nex t
upstream manhole. The camera speed shall not exceed one-half (1/2) foot per second.
A pivot head camera shall be used with detailed inspection of all laterals showing the
entire lateral with a 360-degree pan around the opening. Panning of each lateral shall be
a minimum of 15 seconds.
The Contractor shall add colored dye that contrasts with the pipe color and clean water to
the cleaned sewer line before Television inspection. The recording shall be free from
static and a minimum distance of 10 feet shall be clearly visible in front of the camera.
All recordings shall show on the screen the correct time and date of the inspection, the
name of the camera operator, the manhole numbers being inspected, an accurate footage
count, and all lateral locations using a 12-hour clock position.
All inspections shall be performed by Pipeline Assessment and Certification Program
(PACP) trained personnel. The Contractor shall provide a copy of the inspection, with all
appurtenant written logs, within 24 hours of the inspection.
7-18 SIDE SEWERS
7-18.2 Materials
Supplement this section with the following:
Saddles: Side sewer saddles shall be Romac CB with a 3-1/2” stainless steel single strap.
Saddles are limited to side sewer connections on existing sewer mains and shall have
prior approval by City Engineer. Tapping sleeves for deep sewer service shall provide a
flange for connection. Tapping Sleeves: Tapping sleeves shall be full circle stainless
steel with ductile iron flanged outlet, conforming to the latest AWWA Standard C223. The
following stainless-steel tapping sleeves are approved for use in deep sewer service
application: Ford FAST style, Romac model SST, and Smith-Blair.
7-18.3 Construction Requirements
7-18.3(1) General
Supplement this section with the following:
Side sewers shall be a minimum of four (4) inches in diameter. Larger sizes, if required,
will be approved by the City Engineer on a case-by-case basis.
The fresh concrete curb above all side sewer laterals shall be stamped on the curb face
with a 2" high "S".
7-18.3(5) End Pipe Marker
Revise this section to read:
The location of side sewer at the property line shall be marked per the Standard Detail.
Fiberglass markers may be proposed for approval consideration by the City Engineer.
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7-25 SEWER FORCE MAINS (NEW SECTION)
The following new section shall be added to the Standard Specifications:
7-25.1 Description
This work shall consist of constructing sewer force mains in accordance with the Plans and
Standard Specifications.
7-25.2 Materials
Materials shall meet the requirements of section 7-09 Water Mains of the Standard Specifications
except as follows:
Pipe for Main Line:
Polyvinyl Chloride (PVC) Pressure Pipe (4 inches and over): Polyvinyl Chloride (PVC)
pipe shall conform to the requirements of Section 9-30.1(5)A of the Standard
Specifications. Joints outside of casing shall be rubber gasket push-on type with
thickened bell. Joints within casing shall be restrained using mechanical restraints, Field
Lok gaskets, or approved equal.
Polyvinyl Chloride (PVC) Pressure Pipe: PVC pipe (over 12-inch diameter) shall conform
to the requirements of AWWA C 905 DR 25. Fittings shall be mechanical joint and/or
flanged in accordance with the Plans and Section 9-30.2(1) of the Standard Specifications.
Ductile Iron Pipe: Ductile iron pipe shall conform to the requirements of Section 9-05.13
of the Standard Specifications.
Polyethylene (PE) Pressure Pipe: PE pipe shall conform to the requirements of Section
9-30.2(10) of the Standard Specifications.
High Density Polyethylene Pipe (HDPE): HDPE pipe shall by extra high molecular weight,
high density ethylene/hexane copolymer, PE 4710 polyethylene resin. The Standard
Dimension Ratio shall be SDR 13.5 for pipe sizes 12-inch diameter and smaller.
Fittings for Main Lines:
Connection Couplings: Couplings for Ductile Iron or PVC pipe, either transition or straight
couplings, shall be compression type flexible couplings conforming to Section 9-30.2(7) of
the Standard Specifications.
Aggregates:
See Section 7-08.3 of these Specifications.
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7-25.3 Construction Requirements
7-25.3(2) Pipe Installation
Sewer force main installation shall conform to the requirements of Section 7-08 General Pipe
Installation Requirements of the Standard Specifications or as modified by t hese Special
Provisions.
All sewer force mains shall be tested under a hydrostatic pressure of 150 psi for a fifteen (15)
minute period. The Developer shall make all provisions for transporting water and filling the force
main and shall be responsible for all costs. No leakage will be allowed during the test.
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Pasco Design and Construction Standards Chapter 7 - Stormwater Improvements
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CHAPTER 7 - STORMWATER IMPROVEMENTS
GENERAL REQUIREMENTS FOR STORMWATER IMPROVEMENTS
All extensions and additions to the City of Pasco’s storm sewer (storm drain) system shall conform
to the Design and Construction Standards of the City of Pasco, the Washington State Department
of Ecology, and designed by a Civil Engineer currently licensed by the State of Washington.
Private systems, where required by applicable provisions of the Pasco Municipal Code, s hall also
comply with these requirements.
All stormwater and drainage improvements shall be planned, designed, permitted, constructed
and maintained in accordance with the requirements of the latest edition of the Washington
Department of Ecology (Ecology) Stormwater Management Manual for Eastern Washington
(SWMMEW). The Technical Requirements outlined in Appendix 1 of the Eastern Washington
Phase II Municipal Stormwater Permit shall apply to all new development and redevelopment
sites.
All new storm drainage facilities, public or private, shall be designed by a Professional Engineer
licensed in the State of Washington. Complete stormwater runoff and drainage facilities sizing
calculations shall be submitted to the Engineering Division for review and comment. Storm sewer
facilities and pipelines shall be designed to meet a minimum 25-year storm criteria, and both the
24-hour and short-duration storms shall be considered in the design.
All storm runoff occurring on all new lots and developments (private property) shall be retained
and disposed of on-site. No private storm runoff will be permitted to enter public right-of-way or
the public storm drainage system. The property owner shall maintain all stormwater Best
Management Practices (BMPs) that are installed on private property.
Where existing stormwater from adjacent properties enters the proposed site, the Developer shall
be responsible for including the additional stormwater in the proposed system including retention
and treatment as applicable.
Storm runoff for new public streets shall be designed and constructed as required to the point
where the adjoining property owner’s responsibility for further extension begins. This typically
requires an extension across the entire frontage of the property to the property line of the adjoining
owner.
All storm sewer designs for new public streets shall be based upon an engineering analysis by
the Developer’s Consultant that considers total drainage areas, runoff rates, pipe and inlet
capacities, treatment capacity, and any other factors pertinent to the design.
All illicit discharges as defined by the Washington State Department of Ecology are not permitted
to enter any storm sewer system.
All subsurface infiltration facilities used for the treatment and disposal of stormwater shall meet
the requirements of and be registered with the Ecology Underground Injection Control (UIC)
program. Applicants must register UIC wells with Ecology in the applicant’s name, 60 days prior
to construction as required by Ecology. Following construction completion and at the time of
public improvements certification, the applicant shall process an ownership transfer request with
Ecology, to transition UIC ownership to the City of Pasco.
The SWMMEW requires that a water quality storm (6-month, 24-hour event) be treated as part of
the stormwater system. Basins designed as infiltration facilities shall require a percolation test of
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the native soils to determine treatment ability. The SWMMEW and City of Pasco require a
maximum infiltration rate of 9 inches per hour for soil treatment. In many cases, existing soil
classifications provide much higher infiltration rates requiring amendments to drop this rate. The
SWMMEW provides guidelines for producing an acceptable soil type to meet treatment criteria
necessary to comply with State water quality standards. If the existing soil conditions have an
infiltration rate higher than 9 inches per hour, then the soil does not meet the necessary treatment
criteria and must be amended as outlined in the SWMMEW to create acceptable soil conditions.
Inlet spacing shall be designed in accordance with the WSDOT Hydraulics Manual, Chapter 5.
Generally, inlet spacing shall not exceed 300 feet. There shall be a manhole or Type II catch
basin installed at the intersection of two collector storm sewers. A collector storm sewer is a
sewer servicing more than one catch basin. Stormwater flow shall be kept in the gutter and shall
flow across intersections. Catch basin “bubble up” installations will not be permitted.
Catch basins and inlets shall be located at the ends of curb returns or at property lines between
lots. Catch basins and inlets shall not be located within driveways, driveway transitions, or
pedestrian ramps.
All public stormwater pipes or culverts shall be a minimum of 12 inches in diameter. Pipes shall
have a minimum slope of 0.5% and be designed with a minimum velocity of 2-feet per second.
Pipes shall be sized so that they do not surcharge under design storm conditions.
Manholes shall be installed at all vertical and horizontal angle points in the stormwater pipes, and
at intervals of no greater than 400 feet. Curved or deflected pipelines will not be permitted. All
stormwater manholes with solid lids shall have a channeled base and all catch basin manholes
with grated lids shall have a sump.
A Storm Water Site Plan is required for any project subject to Core Elements #2, #3, #4, #5, #6,
or #8 per Chapter 2 of the SWMMEW. Upon approval of the Storm Water Site Plan, a Storm
Water Construction Permit shall be issued upon payment of the Storm Water Construction Permit
Fee as provided in the City Fee Summary Ordinance 4309.
The applicant’s project may require coverage under the Washington State General NPDES Permit
for construction projects. The Developer shall be responsible for compliance with the State
stormwater permit conditions and shall provide the City with a copy of the Ecology approved
Notice of Intent (NOI), Storm Water Pollution Prevention Plan (SWPPP), or Erosivity Waiver
Certification as applicable.
A temporary erosion and sedimentation control (TESC) plan shall be included with all plan
submittals and should show how existing storm systems and adjacent properties will be protected
from storm runoff.
For commercial and industrial sites, the Developer’s Consultant shall provide both the total square
footage of the entire property under review, and the total square footage of all impervious
surfaces, including but not limited to; the proposed building, any concrete or asphalt paving,
sidewalk, and roof surface, etc. Information shall be shown in a table on the cover sheet, or on
the site plan sheet. This information is required of all new commercial development (or of any
structure undergoing modification or addition).
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DESIGN CRITERIA
The SWMMEW allows different methodologies to apply design storms to stormwater facility
design. For purposes of consistency, specific design storm amounts of precipitation are provided
below and summarized in Table 6-1. Precipitation amounts are taken from the figures and
calculation methods provided in the SWMMEW. Once the rainfall amount is known, hydrographic
methods are used to determine the rate and volume of runoff from the selected design storm, and
to mathematically route a storm through proposed facilities. Hydrographic methods are discussed
below along with their application to different design conditions in Pasco.
DESIGN STORMS
Design storms are used to establish the amount of precipitation to be used in calculating the runoff
from a parcel or basin. Based on rainfall records and methods outlined in the SWMMEW, the
storm events described below are applicable to Pasco. Note that all 24-hour storm precipitation
amounts have been adjusted by a factor of 1.0 for use in the SCS Type IA storm for Eastern
Washington Region 2.
Water Quality 3-Hour Storm – 0.26 inches of precipitation. This short-duration water quality storm
event is intended to provide treatment for the “first flush” events and is representative of a summer
thundershower. The “first flush” can be thought of as the first amount of water that enters the
system during a storm, which typically contains the highest concentration of pollutants such as
roadway grit, dust and oils.
Water Quality 24-Hour Storm – 0.53 inches of precipitation. This 24-hour water quality storm
event is intended to provide treatment for the “first flush” events.
25-Year, 3-Hour Storm (Short-Duration Storm) – 0.92 inches of precipitation. This short-duration
storm has a 25-year return frequency, or a 4 percent chance of occurring in any one year. This
unique storm is representative of the summer thunderstorm where a significant amount of rainfall
occurs over a 3-hour period and should generally be used for design of flow-based stormwater
BMPs.
25-year, 24-Hour Storm (SCS Type IA Storm) – 1.6 inches of precipitation (uses 25-year, 24-hour
storm intensity). This storm has a 25-year return frequency, or a 4 percent chance of occurring
in any one year. Volume-based BMPs should generally be designed for this SCS Type IA storm.
The intensity of this storm is lower since the rainfall occurs more slowly over an extended time
within the 72-hour period. Therefore, the runoff rate is lower, but the volume is greater than the
3-hour storm.
The 25-year design storm warranting the largest storm sewer facility size shall be the controlling
storm.
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TABLE 6-1 PRECIPITATION EVENT INFORMATION
Storm Event Precipitation (Inches)
6-Month, 3-Hour Storm Event 0.26
6-Month, 24-Hour Storm Event 0.53
2-Year, 24-Hour Storm Event 0.8
10-Year, 24-hour Storm Event 1.3
25-Year, 3-Hour Storm Event 0.92
25-Year, 24-Hour Storm Event 1.6
50-Year, 24-Hour Storm Event 1.8
100-Year, 24-Hour Storm Event 2.0
Source: Stormwater Management Manual for Eastern Washington, Ecology, Aug. 2019
Note: 24-hour precipitation amounts have been adjusted for use in the SCS Type IA storm
distribution.
HYDROLOGIC ANALYSIS
Hydrologic analysis determines the amount of runoff from a given storm for a given drainage area.
Available methods range from simple calculations such as the Rational Method to complex
computer models, requiring significant data input and knowledge of hydrologic effects.
The following hydrographic methods are considered acceptable for the watersheds within Pasco
and its urban growth area.
• The Santa Barbara Urban Hydrograph (SBUH) method may be used for all analyses
regardless of the size of the drainage area. Input parameters shall be as described by
Ecology or WSDOT for the design storms described above. Other computer models may
also be used with prior approval by the City.
• For drainage areas less than or equal to 20 acres, the rational formula and modified
rational method, as described in older WSDOT and Soil Conservation Service
publications, may be used for flow-rate-based applications. Inputs shall be as described
in those publications, or other engineering texts. The SCS Unit Hydrograph Method may
also be used.
• For drainage areas greater than 20 acres, and when it is necessary to route flows through
detention facilities, the SCS Unit Hydrograph Method may be used. Inputs shall be as
described in WSDOT and Soil Conservation Service publications, or other engineering
texts.
The SBUH method uses a hyetograph to depict the intensity (amount) of rainfall versus time. A
hyetograph may also be required for routing design storms through some BMPs. Design storm
hyetographs applicable to Pasco stormwater facilities are as follows:
• Water Quality Volume-Based Treatment BMPs – 24-hour SCS Type IA storm with a 6-
month return frequency.
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• Water Quality Flow-Rate-Based Treatment BMPs – 3-hour short-duration storm with a 6-
month return frequency.
• Volume-Based BMPs – SCS Type IA Storm with a 25-year return frequency. Storm
intensity is based on the 25-year, 24-hour storm event.
• Flow-Rate-Based BMPs – 3-hour short-duration storm with a 25-year return frequency as
described in the SWMMEW.
• Critical facilities required to carry 50- and 100-year storms – 24-hour SCS Type II storm.
TREATMENT BMP SIZING
The City of Pasco is located in Ecology’s Region 2 of Eastern Washington. Therefore , all
calculations shall be based on Region 2 methods recommended in Ecology’s SWMMEW for the
sizing of stormwater BMPs. The following are design guidelines for volume-based treatment
BMPs and flow-rate-based treatment BMPs.
Volume-based treatment BMPs are sized the same whether they are located upstream or
downstream of a detention facility. The volume of runoff predicted for the proposed developed
condition of a site will be calculated using the 24-hour SCS Type IA storm with a 6-month return
frequency (the 0.53-inch water quality design storm). The BMP will be sized to treat this amount
of water and will also be sized to pass the 25-year short-duration storm, either through or around
the BMP, without damaging the BMP or dislodging pollutants from within it.
Flow-rate-based treatment BMPs are sized differently depending on whether they are located
upstream or downstream from a detention facility. If the BMP is located upstream of a detention
facility, or if there is no detention facility, the runoff flow rate predicted for the proposed developed
condition of a site will be calculated using the 3-hour short-duration storm with a 6-month return
frequency (the 0.26-inch water quality design storm). If the BMP is located downstream of a
detention facility, it must be sized for the full 2-year release rate of the detention facility.
Stormwater and drainage design within the 200-foot shoreline buffer shall utilize the 24-hour SCS
Type II storm with a return period of 100 years.
FLOW CONTROL
The criteria listed below shall apply to control stormwater runoff flow and the designated design
storms shall apply:
• Flow-rate-based stormwater BMPs such as storm sewer facilities and pipelines shall be
designed to carry at a minimum the 25-year, 3-hour short-duration design storm described
in the SWMMEW (0.92 inches of precipitation). Depending on the size of the basin, time
of concentration and infiltration rates, some infiltration facilities shall be designed using
the 25-year, 24-hour storm (1.6 inches of precipitation, SCS Type IA). The 25-year design
storm warranting the largest storm sewer facility size shall be the controlling storm. At the
City’s discretion, if the facilities are critical to public health and safety, or significant
property damage could occur, they shall be designed to successfully pass the 50-year or
100-year storm. Storm runoff from any new construction will not be permitted to enter the
City’s existing storm sewer pipelines.
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• Volume-based stormwater BMPs such as retention and detention basins shall be
designed based on the 25-year, 24-hour storm (1.6 inches of precipitation, SCS Type IA).
A secondary outlet or emergency spillway shall be provided to pass the 100-year, 24-hour
storm (2.0 inches of precipitation, SCS Type II) without damage to the facility.
SPECIAL PROVISIONS FOR STORMWATER IMPROVEMENTS
The following sections of the WSDOT Standard Specifications have been amended or
supplemented as described below and apply to the construction of public works storm sewer or
drainage improvements within the City of Pasco.
7-02 CULVERTS
7-02.2 Materials
Add the following:
Culvert pipe approved for use on a City project shall be as follows:
Aluminum Culvert Pipe: Aluminum Culvert Pipe shall meet the requirements of
Section 9-05.5 of the Standard Specifications.
Steel Culvert Pipe: Steel Culvert Pipe shall meet the requirements of Section 9-
05.4 of the Standard Specifications.
Corrugated Polyethylene Culvert Pipe: Corrugated Polyethylene (CPE) pipe,
couplings, and fittings shall meet the requirements of Section 9-05.19 of the
Standard Specifications.
7-04 STORM SEWERS
7-04.1 Description
Supplement this section with the following:
The term “storm drain(s)” shall mean the same as storm sewer(s).
7-04.2 Materials
Supplement this section with the following:
The storm sewer (drain) pipe approved for use shall be as follows:
STORM DRAIN PIPE
Solid Wall PVC Storm Sewer Pipe
4”-15” PVC, ASTM D3034-SDR35
18”-27” PVC, ASTM F679
PVC Storm Sewer Pipe shall have Ring-Tite joints.
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Where specified on the Plans, storm drain pipe shall be PVC pressure pipe
conforming to the requirements of Section 9-30.1(5)A and Ductile Iron conforming
to the requirements of Section 9-30.1(1).
UNDERDRAIN INFILTRATION SYSTEM MATERIALS
Pipe: Perforated Corrugated Polyethylene Underdrain pipe, couplings, and fittings
shall comply with all the requirements of Section 9-05.2(8) of the Standard
Specifications.
Drain Rock: Drain rock for use as backfill for the perforated underdrain pipe in the
infiltration trench system shall be clean coarse aggregate conforming to the
requirements of Gravel Backfill for Drywells, as specified in Section 9-03.12(5) of
the Standard Specifications.
Construction Geotextile: Geotextile fabric for underground infiltration systems
shall be non-woven fiber pore size 0-13mm, maximum water permeability 0.05
cm/sec, minimum grab strength 100 lbs, minimum fabric toughness 10,000 lbs ,
and meeting the requirements of ASTM D1682.
7-04.3(1) Cleaning and Testing
7-04.3(1)A General
Supplement this section with the following:
All storm piping, with the exception of infiltration trench perforated pipe, shall have
television inspection. Cost of television inspection shall be included in the pipe installation
cost.
All recordings shall be in color and in DVD format, playable on standard DVD players.
Television inspection shall begin at the downstream structure and end at the next
upstream structure. The camera speed shall not exceed one-half (1/2) foot per second.
A pivot head camera shall be used with detailed inspection of all laterals showing the
entire lateral with a 360-degree pan around the opening. Panning of each lateral shall be
a minimum of 15 seconds.
The Contractor shall add colored dye that contrasts with the pipe color and clean water to
the cleaned storm line before television inspection. The recording shall be free from static
and a minimum distance of 10 feet shall be clearly visible in front of the camera.
All recordings shall show on the screen the correct time and date of the inspection, the
name of the camera operator, the manhole numbers being inspected, an accurate footage
count, and all lateral locations using a 12 hour clock position.
All inspections shall be performed by Pipeline Assessment and Certification Program
(PACP) trained personnel. The Contractor shall provide a copy of the inspection, with all
appurtenant written logs, within 24 hours of the inspection.
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7-05 MANHOLES, INLETS, CATCH BASINS, AND DRYWELLS
7-05.2 Materials
Section 7-05.2 of the Standard Specifications shall be revised as follows:
Drain Rock: Backfill for drywells shall be Gravel Backfill for Drywells as specified in
Section 9-03.12(5) of the Standard Specifications.
Precast Concrete Catch Basin: Catch basins shall be WSDOT Type 1, 1L, or 2 and
constructed as shown on WSDOT Standard Plans.
Catch Basin Metal Castings: All frames and grates shall be capable of withstanding, with
a reasonable margin of safety, a concentrated load of 20,000 pounds and shall be as
specified in Section 9-05.15(2) of the Standard Specifications and WSDOT Standard Plan
B-30.30 or B-30.40, or B-30.80 (circular for manholes). The grate shall be ductile iron
and “bicycle safe.” The contact surfaces of the frame and grate shall be machine finished
to a common plane and shall be so cast as to prevent rocking.
Type 2 Catch Basin Frames and Covers: Frames and covers shall be class 30 cast iron
meeting the requirements of ASTM A48. 24” round covers shall read “STORM” and “CITY
OF PASCO” embossed in top (2” raised letters), cover weight 150 lbs, frame weight 185
lbs. Approved manufacturers include East Jordan Iron Works, D&L Foundry, and Olympic
Foundry.
Precast Concrete Pretreatment Manhole: Stormwater pretreatment manholes shall be
approved by the Washington State Department of Ecology (Ecology) with a General Use
Level Designation (GULD), capable of 50% removal of fine (50 micron mean size) and
80% removal of coarse (125 micron mean size) total suspended solids (TSS) for influent
concentrations greater than 100 mg/L, but less than 200 mg/L, as required by Ecology.
Pretreatment manholes shall be constructed of pre-cast concrete manhole sections, flat
top slab, and adjustment sections (similar to WSDOT Catch Basin Type 2, Standard Plan
B-10.20), with cast iron covers as described above. The pretreatment insert shall be
constructed of fiberglass and/or steel materials that are corrosion resistant. Manhole
safety steps shall be provided as shown on the Plans and the pretreatment insert shall act
as a platform for maintenance purposes.
The pretreatment manhole shall be capable of handling the specified water quality flows
and shall incorporate a bypass within the unit to handle the specified peak flows. The
pretreatment manhole shall be capable of incorporating multiple inlets/outlets, with the
inlet and outlet pipes at 90 degrees to each other. Access to pretreatment insert ports
and openings for maintenance shall be achieved through the cast iron cover(s).
Catch Basin Oil/Water Separators: Oil/Water separators shall be installed in catch basins
upstream of infiltration trenches. Approved manufacturers include Raven Products OWS-
LP-4-15 BMP 12 R or Ground Water Rescue, Inc. “The Eliminator.”
7-05.3 Construction Requirements
Delete the tenth paragraph of this section.
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7-05.3(1) Adjusting Manholes and Catch Basins to Grade
Delete and replace with the following:
Manholes, valve boxes, catch basins, and similar utility appurtenances and structures
shall not be adjusted until the pavement is completed, at which time the center of each
structure shall be relocated from references previously established by the Contractor. All
existing manhole castings shall be replaced with new castings at time of adjustment.
The asphalt concrete pavement shall be cut and removed to a neat circle, the diameter as
specified on the Standard Details. The frame shall be placed on cement concrete blocks
or adjustment rings and brought up to the desired grade. The base materials shall be
removed, and Class 3000 cement concrete shall be placed to the depth specified on the
Standard Detail.
On the following day, a tack coat of asphalt shall be applied to the concrete, the edges of
the asphalt concrete pavement, and the outer edge of the casting. HMA CI. 3/8-Inch
asphalt concrete shall then be placed and compacted with hand tampers and a patching
roller.
The completed patch shall match the existing paved surface for texture, density, and
uniformity of grade. The joint between the asphalt patch and the existing pavement shall
then be sealed with emulsified asphalt and shall be immediately covered with dry paving
sand before the tack has broken.
Utility appurtenances outside paved areas shall be adjusted to match the finish grade of
the area surrounding the structure. The utility cover shall be cleaned of all concrete prior
to acceptance.
7-05.3(3) Connection to Existing Manholes
Supplement this section with the following:
The Contractor shall be required to core drill into the structure, shape the channel to
accommodate the new pipe, and grout the opening.
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CHAPTER 8 - STREET IMPROVEMENTS
GENERAL REQUIREMENTS FOR STREET IMPROVEMENTS
All new street design and construction must conform to these Design and Construction Standards
of the City of Pasco, the Manual on Uniform Traffic Control Devices, the Pasco Municipal Code,
and the latest edition of the Standard Specifications.
TRAFFIC STUDIES
In order to provide sufficient information to assess a development’s impact on the transportation
system and level of service, a traffic study may be required, prepared by the City, and/or it’s
agents, at the Developer’s expense. The City will provide to the Developer a scope and fee
estimate for the traffic study on a project basis. If 100 or more peak hour trips are generated by
the development, a traffic study is mandatory. If less than 100 peak hour trips, the City Engineer
may require a traffic study to be completed on a project basis, at the Developer’s expense. This
decision will be based upon the size of the proposed development, existing roadway condition,
existing and expected traffic volumes, trip distribution, accident history, property rezoning, truck
traffic percentage, event-based traffic, expressed community concern, and other factors relating
to transportation. The level of detail and scope of the traffic study may vary with the size,
complexity, and location of the proposed development. A traffic study shall, at a minimum, be a
thorough review of the immediate and long-range effects of the proposed development on the
City’s transportation system.
STREET REQUIREMENTS
Arterial streets serve as the high-volume corridors that connect the major traffic generators and
shall be designed to meet the minimum right-of-way and roadway dimensions as shown on the
City Standard Details. Face of curb radii at intersections shall be a minimum of fifty (50) feet, or
as approved by the City Engineer. Arterial streets shall be designed for a WB-50 vehicle and HS-
25 loadings.
Collector streets shall be designed to meet the minimum right-of-way and roadway dimensions
as shown on the City Standard Details. Face of curb radii at intersections shall be a minimum of
thirty-five (35) feet, or as approved by the City Engineer. Collector streets shall be designed for
a WB-50 vehicle and HS-25 loadings.
Local Access (Residential) streets shall be designed to meet the minimum right-of-way and
roadway dimensions as shown on the City Standard Details. Face of curb radii at intersections
shall be a minimum of twenty-five (25) feet, or as approved by the City Engineer.
The street centerline radius shall be designed to meet minimum standards for applicable design
speeds as presented in the Policy on Geometric Design of Highways and Streets (Green Book)
published by the American Association of State Highway and Transportation Officials, or as
approved by the City Engineer.
The maximum length of a cul-de-sac street shall be 600 feet measured along the street centerline
from the nearest street intersection to the throat of the cul-de-sac. Where it is not feasible to
construct a cul-de-sac turnaround, the City may allow the use of an “L” or “Hammerhead”
turnaround upon approval by the City Engineer and Fire Department. The cul-de-sac shall have
a minimum right-of-way radius of 55 feet and a minimum driving radius of 50 feet, which may
include depressed curb and six-inch thick concrete sidewalk.
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A subdivision of 30 or more lots shall have two or more access points consistent with the
International Fire Code. All street intersection angles shall not be less than 80 degrees, including
private roads. Offset street intersections shall not be less than 200 feet for Arterial and Collector
streets and 100 feet for Local Access streets. A tangent at least 200 feet long shall be introduced
between reverse curves on Collectors and Arterials.
Street grades shall be kept to a maximum of six (6) percent for Arterials, eight (8) percent for
Collectors, and ten (10) percent for Local Access streets, unless otherwise approved by the City
Engineer. The minimum grade for all streets shall be five-tenths (0.5) percent. Vertical curves
shall be designed when the profile point of intersection grade difference is greater than one (1)
percent. AASHTO requirements for sight-distance shall apply.
Cement concrete barrier curb and gutter and sidewalks shall be installed along both sides of all
new streets unless otherwise specified in PMC Title 12, or as approved by the City Engineer.
Sidewalk widths shall be five (5) feet along Local Access streets and seven (7) feet along Arterial
and Collector streets. Pedestrian ramps shall be designed to City Standard Details and shall
meet ADA requirements. Crosswalks between pedestrian ramps shall be designed meet ADA
requirements with cross slopes less than 2%.
Driveways shall be located on the lowest classification of roadway abutting the development.
Driveway widths and locations are limited to one per lot or as approved by the City Engineer. A
“Corner” lot driveway shall be located as far as possible from the street intersection. Driveway
widths shall be as specified on the City Standard Details.
The sight distance triangle clearview shall remain clear of anything erected, placed, planted, or
allowed to grow in such a manner as to materially impede vision between the heights of 2.5' and
10' above the intersection centerline elevation. At the discretion of the City Engineer, City
infrastructure may be located within the clearview including but not limited to regulatory signage,
illumination, and utility poles.
Figure 8.1 Sight Distance Triangle Clearview
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Street lights shall be installed in accordance with Franklin PUD requirements and City Standar d
Details. Typical street light locations include intersections, outside of curves, and along straight
roadway segments. Actual locations shall be approved by Franklin PUD.
In all new developments, monuments with cover caps and cases shall be installed at the centerline
of street intersections, angle point and points of curves, and at other locations as determined by
the City Engineer.
Traffic signs, posts, sleeves, pavement markings, and channelization devices shall be provided
and installed by the developer in accordance with the latest edition of t he Manual of Uniform
Traffic Control Devices (MUTCD) and City Design and Construction Standards. Center line
markings shall be installed on all paved arterials and collectors, and any lower classified roadways
having an ADT of 6,000 vehicles per day or greater.
Fencing, transformers, pedestals, and other above ground utilities shall not inhibit intersection
sight triangles or access to any City utility.
The City Fire Chief may require an emergency vehicle access in addition to other access points.
If required, the access shall be designed to meet the standards as approved by the Fire Chief.
SPECIAL PROVISIONS FOR STREET IMPROVEMENTS
The following sections of the Standard Specifications have been amended or supplemented as
described below.
2-01 CLEARING, GRUBBING, AND ROADSIDE CLEANUP
2-01.1 Description
Supplement this section with the following:
All work beyond the right-of-way line shall be coordinated with affected property owner(s)
per Section 1-07.24 Rights of Way.
The Contractor shall temporarily remove and later replace to its original condition or
relocate nearby as directed, all mail boxes, small trees, shrubs, street signs and posts,
culverts, irrigation facilities, concrete or rock walls, or other similar obstructions which lie
in or near the line of work and are not intended for removal. Should any damage be
incurred, the cost of replacement or repair shall be borne by the Contractor.
2-01.3(5) Fencing (New Section)
Add the following new section:
The Contractor shall carefully remove existing fencing located within or near the work, as
required for construction. All fencing materials to be removed and reset shall be
temporarily placed on the adjacent properties or stored as directed by the City. Fencing
shall be reset along the property lines or as directed by the City. The removal and resetting
of all fencing shall be done at the Contractor's expense.
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2-02 REMOVAL OF STRUCTURES AND OBSTRUCTIONS
2-02.3 Construction Requirements
2-02.3(2) Removal of Bridges, Box Culverts, and Other Drainage Structures
Supplement this section with the following:
Where structures or installations of concrete, brick, blocks, etc., interfere with the
construction, they shall be removed and any pipe openings shall be properly plugged
watertight with Class 3000 concrete, or with mortar and masonry, blocks, or brick. The
removal and plugging of pipes shall be considered as incidental to the construction.
Where the structures are removed, the voids shall be backfilled with suitable, job-
excavated material and compacted, and such work shall be considered as incidental to
the removal work. If the City determines the job-excavated material to be unsuitable for
backfill, the Contractor shall place ballast or crushed surfacing material as directed by the
City.
2-02.3(3) Removal of Pavement, Sidewalks, Curbs, and Gutters
Supplement this section with the following:
In those areas where asphalt pavement removal is required, the Con tractor shall, prior to
excavation, score the edge of the asphalt concrete pavement with an approved pavement
cutter such as a concrete saw. During the course of the work, the Contractor shall take
precautions to preserve the integrity of this neat, clean pavement edge. Should the
pavement edge be damaged prior to asphalt concrete paving activities, the Contractor
shall be required to trim the edge with an approved pavement cutter as directed by the
City immediately prior to paving. Sidewalk and/or curb and gutter removal shall be from
construction joint to joint. No partial sidewalk panels or curb and gutter sections will be
allowed.
2-03 ROADWAY EXCAVATION AND EMBANKMENT
2-03.1 Description
Supplement this section with the following:
Street excavation shall consist of removing the existing material of whatever nature
encountered to the subgrade elevation and shaping the subgrade to conform to the cross-
section shown on the Plans or as staked in the field.
Where directed by the Consultant, the Contractor shall excavate beyond the right-of-way
in order to adequately slope adjacent properties.
The Contractor shall use caution while performing roadway excavation. Heavy, rubber-
tired equipment, particularly front end loaders, shall limit their travel over a single area as
much as possible. Trucks shall observe a 10 mph speed limit when traveling over exposed
subgrade areas.
The Contracting Agency will reference all known existing monuments or markers relating
to subdivisions, plats, roads, street centerline intersections, etc. The Contractor shall take
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special care to protect these monuments or markers and also the reference points. In the
event the Contractor is negligent in preserving such monuments and markers, the points
will be reset by a licensed surveyor at the Contractor's expense.
2-03.3 Construction Requirements
2-03.3(3) Excavation Below Subgrade
Supplement this section with the following:
At the direction of the Consultant, areas within the street subgrade which exhibit instability
due to high moisture content shall be:
1. Aerated and allowed to dry,
2. Over-excavated and backfilled with ballast, or crushed surfacing base course. The
contractor may be instructed to install construction geotextile for soil stabilization
in the excavation,
3. Or a combination of any of the above.
2-03.3(14)D Compaction and Moisture Control Tests
Delete this section and replace it with the following:
Compaction shall be 95% of maximum density as determined by ASTM D 698 (Stan dard
Proctor). The Contractor shall notify the City when ready for in-place subgrade density
tests. Placement of courses of aggregate shall not proceed until density requirements are
met. The Developer/Contractor shall be responsible for scheduling and paying for all
testing. All costs associated with failed tests/testing shall be the responsibility of the
Contractor.
If the product fails any test, the City Engineer will require additional testing to determine
the extent of the failure and more frequent tests may be required on additional work.
Testing shall be in accordance with Section 1-06.2(1).7
2-07 WATERING
2-07.1 Description
Supplement this section with the following:
The Contractor shall be solely responsible for dust control on the Developer’s project and
shall protect motoring public, adjacent homes and businesses, orc hards, crops, and
school yards from damage due to dust, by whatever means nec essary. The Contractor
shall be responsible for any claims for damages and shall protect the City, Franklin County,
and Consultant from any and all such claims.
When directed by the City, the Contractor shall provide water for dust control within two
hours of such order and have equipment and manpower available at all times including
weekends and holidays to respond to orders for dust control measures.
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2-11 TRIMMING AND CLEANUP
2-11.3 Construction Requirements
Add the following to the first paragraph:
7. Restore all grass area affected by construction with sod and in accordance with the
City of Pasco Construction Standards.
8. Restore all landscaping rock, mulch, and bark with the same materials as existed prior
to construction.
9. Restore all shoulders, from edge of pavement to right of way line, with the same
material as existed prior to construction, except that earth shoulders shall be restored
with 2 inches of compacted crushed surface top course.
10. Restore the site and offsite areas damaged by the Work to their original condition or
better and to the satisfaction of the Engineer and the adjoining homeowners.
4-04 BALLAST AND CRUSHED SURFACING
4-04.3 Construction Requirements
4-04.3(5) Shaping and Compaction
Supplement this section with the following:
The Contractor shall notify the City when he is ready for in-place ballast, base course, or
top course density tests. Placement of successive courses of aggregate or asphalt
concrete shall not proceed until density requirements are met. The Developer/Contractor
shall be responsible for scheduling and paying for all testing. All costs associated with
failed tests/testing shall be the responsibility of the Contractor.
5-04 HOT MIX ASPHALT
(July 18, 2018 APWA GSP)
Delete Section 5-04 and amendments, Hot Mix Asphalt and replace it with the following:
5-04.1 Description
This Work shall consist of providing and placing one or more layers of plant-mixed hot mix asphalt
(HMA) on a prepared foundation or base in accordance with these Specifications and the lines,
grades, thicknesses, and typical cross-sections shown in the Plans. The manufacture of HMA may
include warm mix asphalt (WMA) processes in accordance with these Specifications. WMA
processes include organic additives, chemical additives, and foaming.
HMA shall be composed of asphalt binder and mineral materials as may be required, mixed in the
proportions specified to provide a homogeneous, stable, and workab le mixture.
5-04.2 Materials
Materials shall meet the requirements of the following sections:
Asphalt Binder 9-02.1(4)
Cationic Emulsified Asphalt 9-02.1(6)
Anti-Stripping Additive 9-02.4
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HMA Additive 9-02.5
Aggregates 9-03.8
Recycled Asphalt Pavement 9-03.8(3)B
Mineral Filler 9-03.8(5)
Recycled Material 9-03.21
Portland Cement 9-01
Sand 9-03.1(2)
(As noted in 5-04.3(5)C for crack sealing)
Joint Sealant 9-04.2
Foam Backer Rod 9-04.2(3)A
The Contractor may choose to utilize recycled asphalt pavement (RAP) in the production of HMA.
The RAP may be from pavements removed under the Contract, if any, or pavement material from
an existing stockpile.
The Contractor may use up to 20 percent RAP by total weight of HMA with no additional sampling
or testing of the RAP. The RAP shall be sampled and tested at a frequency of one sample for
every 1,000 tons produced and not less than ten samples per project. The asphalt content and
gradation test data shall be reported to the Contracting Agency when submitting the mix design
for approval on the QPL. The Contractor shall include the RAP as part of the mix design as defined
in these Specifications.
The grade of asphalt binder shall be PG 64S-28. Blending of asphalt binder from different sources
is not permitted.
The Contractor may only use warm mix asphalt (WMA) processes in the production of HMA with
20 percent or less RAP by total weight of HMA. The Contractor shall submit to the Engineer for
approval the process that is proposed and how it will be used in the manufacture of HMA.
Production of aggregates shall comply with the requirements of Section 3-01.
Preparation of stockpile site, the stockpiling of aggregates, and the removal of aggregates from
stockpiles shall comply with the requirements of Section 3-02.
5-04.2(1) How to Get an HMA Mix Design on the QPL
If the contractor wishes to submit a mix design for inclusion in the Qualified Products List (QPL),
please follow the WSDOT process outlined in Standard Specification 5-04.2(1).
5-04.2(1)A Vacant
5-04.2(2) Mix Design – Obtaining Project Approval
No paving shall begin prior to the approval of the mix design by the Engineer.
Nonstatistical evaluation will be used for all HMA not designated as Commercial HMA in the
contract documents.
Commercial evaluation will be used for Commercial HMA and for other classes of HMA in the
following applications: sidewalks, road approaches, ditches, slopes, paths, trails, gores, prelevel,
and pavement repair. Other nonstructural applications of HMA accepted by commercial
evaluation shall be as approved by the Project Engineer. Sampling and testing of HMA accepted
by commercial evaluation will be at the option of the Project Engineer. The Proposal quantity of
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HMA that is accepted by commercial evaluation will be excluded fr om the quantities used in the
determination of nonstatistical evaluation.
Nonstatistical Mix Design. Fifteen days prior to the first day of paving the contractor shall provide
one of the following mix design verification certifications for Contracting Agency review;
• The WSDOT Mix Design Evaluation Report from the current WSDOT QPL, or one of the
mix design verification certifications listed below.
• The proposed HMA mix design on WSDOT Form 350-042 with the seal and certification
(stamp & signature) of a valid licensed Washington State Professional Engineer.
• The Mix Design Report for the proposed HMA mix design developed by a qualified City or
County laboratory that is within one year of the approval date.
The mix design shall be performed by a lab accredited by a national authority such as Laboratory
Accreditation Bureau, L-A-B for Construction Materials Testing, The Construction Materials
Engineering Council (CMEC’s) ISO 17025 or AASHTO Accreditation Program (AAP) and shall
supply evidence of participation in the AASHTO: resource proficiency sample program.
Mix designs for HMA accepted by Nonstatistical evaluation shall:
• Have the aggregate structure and asphalt binder content determined in accordance with
WSDOT Standard Operating Procedure 732 and meet the requirements of Sections 9-
03.8(2), except that Hamburg testing for ruts and stripping are at the discretion of the
Engineer, and 9-03.8(6).
• Have anti-strip requirements, if any, for the proposed mix design determined in
accordance with AASHTO T 283 or T 324 or based on historic anti-strip and aggregate
source compatibility from previous WSDOT lab testing.
At the discretion of the Engineer, agencies may accept verified mix designs older than 12 months
from the original verification date with a certification from the Contractor that the materials and
sources are the same as those shown on the original mix design.
Commercial Evaluation. Approval of a mix design for “Commercial Evaluation” will be based on
a review of the Contractor’s submittal of WSDOT Form 350-042 (For commercial mixes, AASHTO
T 324 evaluation is not required) or a Mix Design from the current WSDOT QPL or from one of
the processes allowed by this section. Testing of the HMA by the Contracting Agency for mix
design approval is not required.
For Commercial HMA, the Contractor shall select a class of HMA and design level of Equivalent
Single Axle Loads (ESAL’s) appropriate for the required use.
5-04.2(2)B Using Warm Mix Asphalt Processes
The Contractor may elect to use additives that reduce the optimum mixing temperature or serve
as a compaction aid for producing HMA. Additives include organic additives, chemical additives
and foaming processes. The use of Additives is subject to the following:
• Do not use additives that reduce the mixing temperature more than allowed in Section 5-
04.3(6) in the production of mixtures.
• Before using additives, obtain the Engineer’s approval using WSDOT Form 350 -076 to
describe the proposed additive and process.
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5-04.3 Construction Requirements
5-04.3(1) Weather Limitations
HMA shall not be placed on any traveled way beginning October 1st through March 31st of the
following year without written approval from the City Engineer.
Asphalt for prime coat shall not be applied when the ground temperature is lower than 50°F
without written approval of the Engineer.
HMA shall not be placed on any wet surface, or when the average surface temperatures are less
than those specified in the following table, or when weather conditions otherwise prevent the
proper handling or finishing of the bituminous mixtures. Any exceptions to the above and following
limitations will not be allowed without the written approval of the Engineer.
1. If the weather criteria are met, the paving contractor shall complete the entire
panel or lane with no transverse joints.
2. If meteorological conditions change after starting, construction shall be
monitored by the Engineer and require their approval.
3. HMA shall not be placed on ground that is frozen.
The weather guide shall be the “National Weather Service” zone forecast for the Lower Columbia
Basin, Washington at www.wrh.noaa.gov/. The wind speed shall be the current conditions at the
Tri-Cities Airport, available at the website above.
5-04.3(2) Paving Under Traffic
When the Roadway being paved is open to traffic, the requirements of this Section shall apply.
The Contractor shall keep intersections open to traffic at all times except when paving the
intersection or paving across the intersection. During such time, and provided that there has been
an advance warning to the public, the intersection may be closed for the minimum time required
to place and compact the mixture. In hot weather, the Engineer may require the application of
water to the pavement to accelerate the finish rolling of the pavement and to shorten the time
required before reopening to traffic.
Before closing an intersection, advance warning signs shall be placed, and signs shall also be
placed marking the detour or alternate route.
During paving operations, temporary pavement markings shall be maintained throughout the
project. Temporary pavement markings shall be installed on the Roadway prior to opening to
traffic. Temporary pavement markings shall be in accordance with Section 8-23.
Wind (mph) Ambient 0F
(Minimum)
Surface 0F
(Minimum)
Precipitation
0-5 45° 40° Not Measurable
5-10 50° 40° Not Measurable
10-15 55° 40° Not Measurable
15+ 60° 45° Not Measurable
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5-04.3(3) Equipment
5-04.3(3)B Hauling Equipment
Trucks used for hauling HMA shall have tight, clean, smooth metal beds and shall have a cover
of canvas or other suitable material of sufficient size to protect the mixture from adverse weather.
Whenever the weather conditions during the work shift include, or are forecas t to include,
precipitation or an air temperature less than 45°F or when time from loading to unloading exceeds
30 minutes, the cover shall be securely attached to protect the HMA.
The contractor shall provide an environmentally benign means to prevent th e HMA mixture from
adhering to the hauling equipment. Excess release agent shall be drained prior to filling hauling
equipment with HMA. Petroleum derivatives or other coating material that contaminate or alter
the characteristics of the HMA shall not be used. For live bed trucks, the conveyer shall be in
operation during the process of applying the release agent.
Sufficient numbers of trucks shall be provided by the Contractor to assure a continuous paving
operation at proper HMA mix temperatures. Paving operations shall not proceed until hauling
equipment sufficient to assure continuous operations is provided.
5-04.3(3)C Pavers
HMA pavers shall be self-contained, power-propelled units, provided with an internally heated
vibratory screed and shall be capable of spreading an d finishing courses of HMA plant mix
material in lane widths required by the paving section shown in the Plans.
The screed shall be operated in accordance with the manufacturer’s recommenda tions and shall
effectively produce a finished surface of the required evenness and texture without tearing,
shoving, segregating, or gouging the mixture. A copy of the manufa cturer’s recommendations
shall be provided upon request by the Contracting Agency. Extensions will be allowed provided
they produce the same results, including ride, density, and surface texture as obtained by the
primary screed. Extensions without augers and an internally heated vibratory screed shall not be
used in the Traveled Way.
If the paving machine in use is not providing the required finish, the Engineer may suspend Work
as allowed by Section 1-08.6. Any cleaning or solvent type liquids spilled on the pavement shall
be thoroughly removed before paving proceeds.
5-04.3(3)E Rollers
Rollers shall be of the steel wheel, vibratory, oscillatory, or pneumatic tire type, in good condition
and capable of reversing without backlash. Operation of the roller shall be in accordance with the
manufacturer’s recommendations. When ordered by the Engineer for any roller planned for use
on the project, the Contractor shall provide a copy of the manufacturer’s recommendation for the
use of that roller for compaction of HMA. The number and weight of rollers shall be sufficient to
compact the mixture in compliance with the requirements of Section 5 -04.3(10). The use of
equipment that results in crushing of the aggregate will not be permitted. Rollers producing pickup,
washboard, uneven compaction of the surface, displacement of the mixture or other undesirable
results shall not be used.
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5-04.3(4) Preparation of Existing Paved Surfaces
When the surface of the existing pavement or old base is irregular, the Contractor shall bring it to
a uniform grade and cross-section as shown on the Plans or approved by the Engineer.
Preleveling of uneven or broken surfaces over which HMA is to be placed may be accomplished
by using an asphalt paver, a motor patrol grader, or by hand raking, as approved by the Engineer.
Compaction of preleveling HMA shall be to the satisfaction of the Engineer and may require the
use of small steel wheel rollers, plate compactors, or pneumatic rollers to avoid bridging across
preleveled areas by the compaction equipment. Equipment used for the compaction of preleveling
HMA shall be approved by the Engineer.
Before construction of HMA on an existing paved surface, the entire surface of the pavement shall
be clean. All fatty asphalt patches, grease drippings, and other objectionable matter shall be
entirely removed from the existing pavement. All pavements or bituminous surfaces shall be
thoroughly cleaned of dust, soil, pavement grindings, and other foreign matter. All holes and small
depressions shall be filled with an appropriate class of HMA. The surface of the patched area
shall be leveled and compacted thoroughly. Prior to the application of tack coat, or paving, the
condition of the surface shall be approved by the Engineer.
A tack coat of asphalt shall be applied to all paved surfaces on which any course of HMA is to be
placed or abutted; except that tack coat may be omitted from clean, n ewly paved surfaces at the
discretion of the Engineer. Tack coat shall be uniformly applied to cover the exis ting pavement
with a thin film of residual asphalt free of streaks and bare spots at a rate between 0.02 and 0.10
gallons per square yard of retained asphalt. The rate of application shall be approved by the
Engineer. A heavy application of tack coat shall be applied to all joints. For Roadways open to
traffic, the application of tack coat shall be limited to surfaces that will be paved during the sa me
working shift. The spreading equipment shall be equipped with a thermometer to indicate the
temperature of the tack coat material.
Equipment shall not operate on tacked surfaces until the tack has broken and cured. If the
Contractor’s operation damages the tack coat it shall be repaired prior to placement of the HMA.
The tack coat shall be CSS-1, or CSS-1h emulsified asphalt. The CSS-1 and CSS-1h emulsified
asphalt may be diluted once with water at a rate not to exceed one part water to one part
emulsified asphalt. The tack coat shall have sufficient temperature such that it may be applied
uniformly at the specified rate of application and shall not exceed the maximum temperature
recommended by the emulsified asphalt manufacturer.
Overlays and Utility Patches
Edges of asphalt and curb edge shall be tack coated.
Prior to paving utility trenches, the edges of the trenches shall be saw-cut parallel to the center of
the street leaving long straight edges. Should any undermining occur on existing adjacent
pavement, the contractor shall neatly cut the pavement 6 inches beyond the undermined area.
The City Engineer may waive all or a portion of the saw cutting requirement if the original street
cut is straight and not damaged.
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5-04.3(4)B Soil Residual Herbicide
Contractor shall apply one application of an approved soil residual herbicide on areas where hot
mix asphalt is applied. The requirements of Section 8-02.3(2)A shall apply to this application. The
application of herbicide shall precede paving by no more than 24 hours.
5-04.3(4)C Pavement Repair
The Contractor shall excavate pavement repair areas and shall backfill these with HMA in
accordance with the details shown in the Plans and as marked in the field. The Contractor shall
conduct the excavation operations in a manner that will protect the pavement that is to remain.
Pavement not designated to be removed that is damaged as a result of the Contractor’s
operations shall be repaired by the Contractor to the satisfaction of the Engineer at no cost to the
Contracting Agency. The Contractor shall excavate only within one lane at a time unless approved
otherwise by the Engineer. The Contractor shall not excavate more area than can be completely
finished during the same shift, unless approved by the Engineer.
Excavated materials will become the property of the Contractor and shall be disposed of in a
Contractor-provided site off the Right of Way or used in accordance with Sections 2-02.3(3) or 9-
03.21.
Asphalt for tack coat shall be required as specified in Section 5-04.3(4). A heavy application of
tack coat shall be applied to all surfaces of existing pavement in the pavement repair area.
After the completion of trench and patch repairs, the Contractor shall seal all joints with CSS-1
and dry paving sand.
5-04.3(7) Spreading and Finishing
The mixture shall be laid upon an approved surface, spread, and struck off to the grade and
elevation established. HMA pavers complying with Section 5-04.3(3) shall be used to distribute
the mixture. Unless otherwise directed by the Engineer, the nominal compacted depth of any layer
of any course shall not exceed 0.30 feet.
On areas where irregularities or unavoidable obstacles make the use of mechanical spreading
and finishing equipment impractical, the paving may be done with other equipment or by hand.
5-04.3(8) Aggregate Acceptance Prior to Incorporation in HMA
For HMA accepted by nonstatistical evaluation the aggregate properties of sand equivalent,
uncompacted void content and fracture will be evaluated in accordance with Section 3-04.
Sampling and testing of aggregates for HMA accepted by commercial evaluation will be at the
option of the Engineer.
5-04.3(9) HMA Mixture Acceptance
Acceptance of HMA shall be as provided under nonstatistical, or commercial evaluation.
Nonstatistical evaluation will be used for the acceptance of HMA unless Commercial Evaluation
is specified.
Commercial evaluation will be used for Commercial HMA and for other classes of HMA in the
following applications: sidewalks, road approaches, ditches, slopes, paths, trails, gores, prelevel,
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temporary pavement, and pavement repair. Other nonstructural applications of HMA accepted by
commercial evaluation shall be as approved by the Engineer. Sampling and testing of HMA
accepted by commercial evaluation will be at the option of the Engineer.
5-04.3(9)C2 Mixture Nonstatistical Evaluation Sampling
Samples for acceptance testing shall be obtained by the Contractor when ordered by the
Engineer. The Contractor shall sample the HMA mixture in the presence of the Engineer and in
accordance with AASH-TO T 168. A minimum of three samples should be taken for each class of
HMA placed on a project.
5-04.3(9)C3 Mixture Nonstatistical Evaluation – Acceptance Testing
Testing of HMA for compliance of Va will at the option of the Contracting Agency. If tested,
compliance of Va will use WSDOT SOP 731.
Testing for compliance of asphalt binder content will be by WSDOT FOP for AASHTO T 308.
Testing for compliance of gradation will be by FOP for WAQTC T 27/T 11.
Testing costs shall be the responsibility of the Contractor.
5-04.3(10) HMA Compaction Acceptance
HMA mixture accepted by nonstatistical evaluation that is used in traffic lanes, including lanes for
intersections, ramps, truck climbing, weaving, and speed change, and having a specified
compacted course thickness greater than 0.10-foot, shall be compacted to a specified level of
relative density. The specified level of relative density shall be a minimum of 92 percent of the
maximum density. The maximum density shall be determined by WSDOT FOP for AASHTO T
729. The specified level of density attained will be determined by the evaluation of the density of
the pavement. The density of the pavement shall be determined in accordance with WSDOT FOP
for WAQTC TM 8, except that gauge correlation will be at the discretion of the Engineer, when
using the nuclear density gauge and WSDOT SOP 736 when using cores to determine density.
Tests for the determination of the pavement density will be taken in accordance with the required
procedures for measurement by a nuclear density gauge after completion of the finish rolling. The
test procedures FOP for WAQTC TM 8 and WSDOT SOP T 729 will be used on the day the mix
is placed and prior to opening to traffic.
Two (2) density tests shall be taken within the first one hundred (100) tons of asphalt delivered to
the site each day and one (1) every 100 tons thereafter for the remainder of the day. If the asphalt
fails any test, the Engineer will require additional testing to determine the extent of the failure and
more frequent tests may be required on additional asphalt. Testing and samples shall be in
accordance with Section 1-06.2(1).
In addition to randomly selected density test locations, the City may also isolate any area that is
suspected of being defective in relative density and may require additional testing at the
Contractor’s expense.
HMA for preleveling shall be thoroughly compacted. HMA that is used for preleveling wheel rutting
shall be compacted with a pneumatic tire roller unless otherwise approved by the Engineer.
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Test Results
HMA testing shall be pre-arranged and oil content results reported within two (2) hours of
sampling. Initial reports may be by phone, subsequent written documents shall be submitted to
the City prior to the next day’s paving shift.
5-04.3(10)A HMA Compaction – General Compaction Requirements
Compaction shall take place when the mixture is in the proper condition so that no undue
displacement, cracking, or shoving occurs. Areas inaccessible to large compaction equipment
shall be compacted by other mechanical means. Any HMA that becomes loose, broken,
contaminated, shows an excess or deficiency of asphalt, or is in any way defective, shall be
removed and replaced with new hot mix that shall be immediately compacted to conform to the
surrounding area.
The type of rollers to be used and their relative position in the compaction sequence shall
generally be the Contractor’s option, provided the specified densities are attained. Unless the
Engineer has approved otherwise, rollers shall only be operated in the static mode when the
internal temperature of the mix is less than 175°F. Regardless of mix temperature, a roller shall
not be operated in a mode that results in checking or cracking of the mat. Rollers shall only be
operated in static mode on bridge decks.
5-04.3(11) Reject Work
5-04.3(11)A Reject Work General
Work that is defective or does not conform to requirements shall be rejected. The Contractor may
propose, in writing, alternatives to removal and replacement of rejected material. Acceptability of
such alternative proposals will be determined at the sole discretion of the Engineer. HMA that has
been rejected is subject to the requirements in Section 1-06.2(2) and this specification, and the
Contractor shall submit a corrective action proposal to the Engineer for approval.
5-04.3(11)B Rejection by Contractor
The Contractor may, prior to sampling, elect to remove any defective material and replace it with
new material. Any such new material will be sampled, tested, and evaluated for acceptance.
Supplement this section with the following:
5-04.3(12) Joints
5-04.3(12)A1 Transverse Joints
The Contractor shall conduct operations such that the placing of the top or wearing course is a
continuous operation or as close to continuous as possible. Unscheduled transverse joints will be
allowed, and the roller may pass over the unprotected end of the freshly laid mixture only when
the placement of the course must be discontinued for such a length of time that the mixture will
cool below compaction temperature. When the Work is resumed, the previously compacted
mixture shall be cut back to produce a slightly beveled edge for the full thickne ss of the course.
A temporary wedge of HMA constructed on a 20H:1V shall be constructed where a trans verse
joint as a result of paving or planing is open to traffic. The HMA in the temporary wedge shall be
separated from the permanent HMA by strips of heavy wrapping paper or other methods approved
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by the Engineer. The wrapping paper shall be removed and the joint trimmed to a slightly beveled
edge for the full thickness of the course prior to resumption of paving.
The material that is cut away shall be wasted and new mix shall be laid against the cut. Rollers
or tamping irons shall be used to seal the joint.
5-04.3(12)A2 Longitudinal Joints
The longitudinal joint in any one course shall be offset from the course immediately below by not
more than 6 inches nor less than 2 inches. All longitudinal joints constructed in the wearing course
shall be located at a lane line or an edge line of the Traveled Way. A notched wedge joint shall
be constructed along all longitudinal joints in the wearing surface of new HMA unless otherwise
approved by the Engineer. The notched wedge joint shall have a vertical edge of not less than
the maximum aggregate size or more than ½ of the compacted lift thickness and then taper down
on a slope not steeper than 4H:1V. The sloped portion of the HMA notched wedge joint shall be
uniformly compacted.
All joints shall be hand raked prior to rolling. The final joint shall be straight, level with the abutting
edge, free of coarse material at the surface, and neat in appearance. The Co ntractor shall use
panel widths that minimize longitudinal pavement joints.
5-04.3(13) Surface Smoothness
The completed surface of all courses shall be of uniform texture, smooth, uniform as to crown and
grade, and free from defects of all kinds. The completed surface of the wearing course shall not
vary more than ⅛ inch from the lower edge of a 10-foot straightedge placed on the surface parallel
to the centerline. The transverse slope of the completed surface of the wearing course shall vary
not more than ¼ inch in 10 feet from the rate of transverse slope shown in the Plans.
When deviations in excess of the above tolerances are found that result from a high place in the
HMA, the pavement surface shall be corrected by one of the following methods:
1. Removal of material from high places by grinding with an approved grinding machine , or
2. Removal and replacement of the wearing course of HMA, or
3. By other method approved by the Engineer.
Correction of defects shall be carried out until there are no deviations anywhere greater than the
allowable tolerances.
5-04.3(14)B Paving and Planing Under Traffic
5-04.3(14)B1 General
In addition, the requirements of Section 1-07.23 and the traffic controls required in Section 1-10,
and unless the Engineer approves, the Contractor must comply with the following:
1. Intersections:
a. Keep intersections open to traffic at all times, except when paving or planing
operations through an intersection requires closure. Such closure must be kept to the
minimum time required to place and compact the HMA mixture, or plane as
appropriate. For paving, schedule such closure to individual lanes or portions thereof
that allows the traffic volumes and schedule of traffic volumes required in the approved
traffic control plan. Schedule work so that adjacent intersections are not impacted at
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the same time and comply with the traffic control restrictions required by the Traffic
Engineer. Each individual intersection closure or partial closure must be addressed in
the traffic control plan, which must be submitted to and accepted by the Engineer, see
Section 1-10.2(2).
b. When planing or paving and related construction must occur in an intersection,
consider scheduling and sequencing such work into quarters of the intersection, or half
or more of an intersection with side street detours. Be prepared to sequence the work
to individual lanes or portions thereof.
c. Should closure of the intersection in its entirety be necessary, keep such closure to
the minimum time required to place and compact the HMA mixture, plane, remove
asphalt, tack coat, and as needed.
d. Any work in an intersection requires advance warning in both signage and a number
of Working Days advance notice as determined by the Engineer, to alert traffic and
emergency services of the intersection closure or partial closure.
e. Allow new compacted HMA asphalt to cool to ambient temperature before any traffic
is allowed on it. Traffic is not allowed on newly placed asphalt until approval has been
obtained from the Engineer.
2. Temporary centerline marking, post-paving temporary marking, temporary stop bars, and
maintaining temporary pavement marking must comply with Section 8-23.
3. Permanent pavement marking must comply with Section 8-22.
6-02 CONCRETE STRUCTURES
6-02.3(14) Finishing Concrete Surfaces
Supplement this section with the following:
The completed surface shall be of uniform texture, smooth, uniform as to grade, and free
from defects of all kinds. The completed surface shall not vary more than 1/8 -inch from
the lower edge of a 10-foot straightedge placed on the surface parallel to the centerline.
The finish shall be a light broom finish, or as noted in the City of Pasco Standard Plans,
or as approved by the Engineer. A non-uniform finish, an overworked finish, a finish where
a cement layer has formed, discolored, is spalling, or a finish damaged by the weather,
will not be accepted, and shall be replaced at the Contractor’s expense.
8-02 ROADSIDE RESTORATION
8-02.1 Description
Supplement this section with the following:
Landscape plan approval is administered by the Administrative & Community Services
(AC&S) Department. Landscape plans are subject the standards for installation and
material specifications as supplied by this department. The developer shall submit final
landscape plans and specifications for approval consideration at the time that the Civil
Engineering Plans are submitted for approval. Landscape plan review will run concurrent
with civil plan review. The landscape plan will be discussed at the preconstruction
conference and it is recommended that the developer’s landscape contractor attend.
All landscape correspondence, plan and specification submittals, and question should be
directed to:
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Dan Dotta
Facilities Manager
DOTTAD@pasco-wa.gov
(509)543-5759
(509)430-6516
Approval of landscape plan(s) and specifications, and receipt of the final as-builts are
required before the City of Pasco will consider the project substantially complete and/or
certification of completed public improvements.
8-04 CURBS, GUTTERS, AND SPILLWAYS
8-04.3 Construction Requirements
Supplement this section with the following:
Testing requirements shall be as follows:
Project Quantity Test Requirement
Less than 5 CY None
5 CY – 10 CY 1 Slump, 4 Cylinders
10+ CY 2 Slump, 4 Cylinders per 25 CY
For project quantities above five (5) cubic yards, test requirements shall be based on
concrete placed during one (1) working day. If the concrete fails any test, the Engineer will
require additional testing to determine the extent of the failure and more frequent tests
may be required on additional concrete being placed. Testing and samples shall be in
accordance with Section 1-06.2(1).
Regardless of quantity, a Certification of Compliance shall be provided for all concrete
delivered to the site in accordance with Section 6-02.3(5)B.
8-04.3(1) Cement Concrete Curbs, Gutters, and Spillways
Revise the fourth paragraph of Section 8-04.3(1) to read:
Expansion joints in the curb or curb and gutter shall be spaced at 50 -foot intervals, the
beginning and ends of curb returns, drainage structures, bridges, and cold joints with
existing curbs and gutters. The expansion joint shall be filled to full cross-section with ½-
inch premolded joint filler. When curb or curb and gutter is placed adjacent to Portland
Cement Concrete Pavement, a 3/8-inch thick, 6-inch deep premolded joint filler shall be
installed between the 2 vertical surfaces to prevent cracking. Joint material shall be set
flush or trimmed flush with the finished concrete surface. Construction joints shall be at
accurate ten (10) foot spacing and shall consist of a two (2) inch cut or slice into the
concrete pour, and an additional two (2) inch cut into the heel of the pour. Joints shall be
formed neatly and perpendicular to the line of the curb.
Supplement this section with the following:
Cement concrete traffic curb and gutter shall be as shown on the City's Standard Plans.
Full Height or “Type A” cement concrete traffic curb and gutter shall be used on the
roadway. Depressed or “Drop” cement concrete traffic curb and gutter shall be used at all
driveway entrances and sidewalk ramp locations and as directed in the field by the City.
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Depressed “Type D” cement concrete traffic curb and gutter shall be used on cul-de-sacs
from curb return to curb return. Cement concrete curb and gutter which does not comply
with the City's details shall be removed and replaced at the Contractor's expense.
A template shall be required to be placed at the back of curb for construction of driveway
transitions from Type A to Type D curb and gutter. The template shall extend from the
bottom of curb to the top of the curb and shall have a minimum length to provide a
maximum slope of 8.3%.
The new concrete curb and gutter shall be cured in accordance with Section 5-05.3(13)A
of the Standard Specifications. Application of the curing compound shall be in accordance
with the manufacturer's recommendations.
First-class workmanship and finish will be required on all portions of concrete curb and
gutter work. Quality of workmanship and finish will be evaluated continuously and will be
based solely upon the judgment of the City. The Contractor shall be required to construct
a minimum 20 linear foot section of curb and gutter which demonstrates quality which is
acceptable by the City. This “model” section will be referenced during construction for
comparison to newly poured curb. If at any time it is found that quality is unacceptable,
work shall be immediately stopped, and no additional curb and gutter shall be placed.
Cement concrete curb and gutter which does not comply with the section details on the
Plans, or in the City's opinion does not demonstrate first-class workmanship and finish,
shall be removed and replaced at the Contractor's expense. Should the Contractor's
equipment or methods be unable to produce curb and gutter meeting the requirements of
the Details and Specifications, no further curb and gutter construction will be allowed until
corrections have been made to said equipment or methods.
8-06 CEMENT CONCRETE DRIVEWAY ENTRANCES
8-06.3 Construction Requirements
Supplement this section with the following:
The concrete driveway entrance/sidewalk shall be six (6) inches in thickness. Both the
curb and gutter as well as the sidewalk portion must comply the requirement of 8-04.3(1).
Class 4000 air entrained concrete conforming to the Section 6-02 shall be required.
8-13 MONUMENT CASES
Supplement this section with the following:
8-13.1 Description
(March 13, 1995 WSDOT GSP)
Delete this section and replace it with the following:
This work shall consist of furnishing and placing monument cases, c overs, and pipes in
accordance with the Standard Plans and these Specifications, in conformity with the lines
shown in the Plans.
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8-13.2 Materials
Supplement this section with the following:
The monument frame and cover shall be East Jordan Iron Works model 3680.
8-13.3 Construction Requirements
The last paragraph of this section is revised to read:
The Contractor will be responsible for placing the concrete core and tack or wire inside
the pipe.
8-14 CEMENT CONCRETE SIDEWALKS
8-14.3 Construction Requirements
Supplement this section with the following:
Testing requirements shall be as follows:
Project Quantity Test Requirement
less than 5CY None
5CY - 10CY 1 Slump, 4 Cylinders
10+CY 2 Slump, 4 Cylinders per each 25CY
For project quantities above five (5) cubic yards, test requirements shall be based on
concrete placed during one (1) working day. If the concrete fails any test, the Engineer will
require additional testing to determine the extent of the failure and more frequent tests
may be required on additional concrete being placed. Testing and samples shall be in
accordance with Section 1-06.2(1).
Regardless of quantity, a Certification of Compliance shall be provided for all concrete
delivered to the site in accordance with Section 6-02.3(5)B.
8-14.3(3) Placing and Finishing Concrete
Supplement this section with the following:
Expansion joints, using 1/2” thick pre-molded material (AASHTO M213) at full depth, shall
be perpendicular and provided at a maximum spacing of thirty (30) feet, at cold joints and
at each side of driveway. See WSDOT Standard Plans F-40 for joints at pedestrian ramps.
Sidewalk construction joints shall be provided at five (5) foot intervals, or as required to
match existing improvements. All work shall be perpendicular to the curb and straight.
Joint material shall be set flush or trimmed flush with the finished concrete surface.
Concrete finish shall be in accordance with Section 6-02.3(14).
All sidewalks not located in driveway entrance areas shall be four (4) inches in thickness.
All concrete approaches located behind a Type D curb and gutter section or at any
driveway location shall be six (6) inches in thickness.
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Concrete sidewalk shall be cured in accordance with Section 5-05.3(13)A of the Standard
Specifications. Application of the curing compound shall be in accordance with the
manufacturer's recommendations. Failure to properly secure or seal the cement concrete
sidewalk will require the Contractor to remove and replace the sidewalk section at h is
expense.
Sidewalk ramps shall be constructed as shown on the Plans in accordance with the City’s
Standard Plans.
First-class workmanship and finish will be required on all portions of cement concrete
sidewalk work. Quality of workmanship and finish will be evaluated continuously and will
be based solely upon the judgment of the City. If at any time it is found that quality is
unacceptable, work shall be immediately stopped, and no additional sidewalk shall be
placed. Cement concrete sidewalk which does not comply with the section details on the
Plans, or in the City's opinion does not demonstrate first-class workmanship and finish,
shall be removed and replaced at the Contractor's expense. Should the Contractor’s
equipment or methods be unable to produce sidewalk meeting the requirements of the
Plans and Specifications, no further sidewalk construction will be allowed until corrections
have been made to said equipment or methods.
8-20 ILLUMINATION, TRAFFIC SIGNAL SYSTEMS, AND ELECTRICAL
8-20.1 Description
Supplement this section with the following:
All work shall be coordinated and in conformance with Franklin PUD standards.
8-20.2 Materials
Supplement this section with the following:
Materials shall meet the requirements of the City of Pasco Standard Details and Franklin
PUD standards.
8-20.3 Construction Requirements
8-20.3(1) General
Supplement this section with the following:
The Contractor is responsible for coordinating with the Department of Labor and
Industries, the Engineer, and Franklin PUD for all required inspections and service.
8-20.3(2) Excavation and Backfill
Delete the first paragraph and replace it with the following:
The excavation required for the installation of conduit, cement concrete anchor bases, and
pullboxes shall be performed in such a manner as to cause the least possible damage to
streets, sidewalks, and other improvements. Anchor base excavation shall be augered or
dug by hand with proper care to avoid damage to other utilities. Excavation shall not be
performed until immediately prior to installation of conduit and/or structures. Back filling
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shall be as shown on the Plans and shall conform to the provisions specified herein.
Compaction of conduit trenches and structure backfill shall be accomplished by a method
which will result in backfill compacted to at least 95 percent of maximum density.
8-20.3(5) Conduit
Supplement this section with the following:
The ends of conduits for future connection shall be marked with a n 8’ treated 2x4 inside
of an 8’ steel stud, painted red, extending 24”-36” above finished ground surface.
Fiberglass markers may be proposed for approval consideration by the City Engineer.
8-20.3(6) Junction Boxes, Cable Vaults, and Pull boxes
Replace the first paragraph with the following:
The terms "pullbox" and "junction box" are considered interchangeable.
Junction boxes shall be installed at each pole and at each end of all crossings. Junction
boxes shall be QUAZITE PG-1324.
8-20.3(10) Electrical Service
Supplement this section with the following:
All of the work shall meet the requirements of Franklin PUD and the National Electric Code.
8-21 PERMANENT SIGNING
8-21.2 Materials
Supplement this section with the following:
Sign posts for permanent traffic control signing shall be 2"x2" 12-gauge perforated steel
tubing. Socket sleeves for the sign post shall be 2-1/4"x 2-1/4"x30" 12-gauge perforated
steel tubing.
Street name sign brackets shall be Zumar.
8-21.3 Construction Requirements
Supplement this section with the following:
Socket sleeves for sign posts shall be set in 12" diameter x 18" deep base of class 3000
cement concrete at finish grade so that erected signs will be plumb with roadway/sidewalk.
The Contractor shall correct any misaligned socket sleeves at his own expense.
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8-22 PAVEMENT MARKING
8-22.1 Description
Supplement this section with the following:
This work includes temporary pavement markings as described in the Plans.
8-22.2 Materials
Supplement this section with the following:
Arrows, letters, symbols, stop lines, and crosswalks shall be Type B – Pre-formed Fused
Thermoplastic. All lines shall be Type A – Liquid Hot Applied Thermoplastic. Striping
material type may vary only with written approval from the City Engineer.
9-03 AGGREGATES
9-03.12(3) Gravel Backfill for Pipe Zone Bedding
Revise this section to read:
Backfill shall be as follows:
Gravel Backfill for Pipe Zone (including Bedding): Pipe zone material shall be Crushed
Surfacing Top Course meeting the requirements of section 9-03.9(3), and shall be placed
and compacted in layers as designated by the City. With prior approval by the City
Engineer, suitable native material may be an acceptable alternate for pipe zone bedding
above the bottom of the pipe.
Trench Backfill: All longitudinal pipeline trenches (parallel to curb) may be backfilled full
depth above the pipe zone with native material (free of organic material, wood, rocks, or
pavement chunks larger than 6-inches in maximum dimension), unless otherwise directed
by the City of Pasco. Street crossings, transverse trenches, and other locations as
directed by the City of Pasco may be required to be backfilled full depth with imported
select backfill. Imported select backfill shall be crushed surfacing top course or crushed
surfacing base course meeting the requirements of section 9-03.9(3), placed and
compacted in layers.
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APPENDIX A
STANDARD DETAILS INDEX
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PASCO STANDARD DETAILS INDEX
STORM DRAINAGE
SD-1 Type 1 Catch Basin
SD-2 Type 2 Catch Basin
SD-3 Infiltration Trench
SANITARY SEWER
SS-1 Standard Manhole
SS-2 Manhole Frame and Cover (Locking & Non-Locking)
SS-3 Standard Drop Manhole
SS-4 Manhole Adjustments
SS-5 Typical Sewer/Storm Drain Trench Section
SS-6 Sewer Stub Installation (New and Existing Main)
SS-7 Doghouse Manhole
SS-8 Sewer Cleanout
STREETS
ST-1 Monument Case & Cover
ST-2A Typical Street Sections Local Access
ST-2B Typical Street Sections Partial
ST-2C Typical Street Sections Arterial and Collector
ST-3 Trench Surfacing Repair
ST-4 Cement Concrete Sidewalk
ST-5 Driveway Approaches
ST-6 Cement Concrete Curbs
ST-7 Cul-De-Sac
WATER
W-1 Tapping Water Main
W-2 Residential and 1” Commercial Water Service
W-3 2” Service Installation
W-4 Cast Iron Valve Box
W-5 Blow-Off Assembly
W-6 Air/Vacuum Relief and Vault
W-7 3” to 8” Water Services
W-8 Concrete Thrust Blocking
W-9 Saddle Thrust Blocking
W-10 Fire Hydrant Installation
W-11 Fire Lines/Backflow
W-12 Guard Post
W-13 PVBA/SVBA Installation 1/2” to 2”
W-14 DCVA Installation 1/2” to 2”
W-15 DCVA & DCDA Dual Installation Larger Than 2”
W-16 DCDA & DCVA Installation Larger Than 2”
W-17 RPBA Installation 3/4” to 2”
W-18 RPDA & RPBA Installation Larger Than 2”
W-19 RPDA & RPBA Dual Installation Larger Than 2”
W-20 Typical Water Trench Section
W-21 Irrigation Service (Front Yard)
W-22 City Owned or Acquired Irrigation Services
Page 145 of 187
5'34"
#4 REBAR
PLAN
A
A
5'
NEW ROADWAY
#4 REBAR 2" RADIUS
CURB
SECTION A-A
CAST IRON FRAME AND
VANED GRATE, SEE
SPECIFICATIONS
DRAIN PIPE BETWEEN
DRAIN INLETS, FOR
SIZE SEE PLANS
1:2 GROUT COLLAR INSIDE AND OUT
ONE 4" ADJUSTMENT
SECTION IS REQUIRED.
3/8" EXP. JOINT
MATERIAL. (TYP)
3%-7%18" MIN. OR ASDIRECTEDNOTES:
1.MAXIMUM PIPE DIAMETER SHALL BE 15 INCHES.
2.SEE DWG. NO. SS-1 FOR STORM DRAIN MANHOLE.
3.SEE DWG. NO. SD-3 FOR INFILTRATION TRENCH.
4.DO NOT KNOCK OUT HOLE IN BOTTOM OF CATCH BASIN.
18"
MIN
TYPE 1 CATCH BASIN,
WSDOT STD. PLAN B-5.20
GROUT BETWEEN
ADJUSTMENT RING AND
CATCH BASIN, INSIDE
AND OUTSIDE
LOWER FRAME 1/2"
FROM GUTTER FLOW
LINE ELEVATION
PIPE FLUSH WITH CATCH BASIN
WALL, CUT AS NECESSARY
CEMENT CONCRETE GUTTER
6" OF BASE ROCK. (CSBC)
COMPACTED TO 95% DENSITY
(ASTM D698)
GUTTER PAN AND JOINTING
PER WSDOT STD. PLAN F-10.16
CITY OF PASCO - STANDARD DETAIL TYPE 1 CATCH BASIN SD-1
R: 09/06/2019Page 146 of 187
NOTE:
SEE DWG. NO. SD-3 FOR INFILTRATION TRENCH.
4' MIN., SIZE PER PLANS
24" MIN.
5' MINIMUM LENGTH
OF PVC PIPE INTO
CATCH BASIN
12" INFILTRATION PIPE,
SEE DWG. NO. SD-3
INLET PIPE FROM
CATCH BASIN
PRECAST CONCRETE
RISER RINGS AS
NECESSARY, ONE 4"
ADJUSTMENT SECTION
IS REQUIRED
CIRCULAR RING WITH SLOTTED GRATE
COVER IN COLLECTION LOCATIONS, OR
CIRCULAR RING WITH SOLID COVER IN
NON-COLLECTION LOCATIONS, SEE
PASCO SPECIFICATION 7-05.2
FLAT SLAB LID
12" REMOVABLE
GASKETED PVC TEE
FOR PRETREATMENT TRANSITION
COUPLING
FLEXIBLE RUBBER
BOOT WITH
NON-SHRINK GROUT
6" OF BASE ROCK. (CSBC)
COMPACTED TO 95% DENSITY
(ASTM D698)
TYPE 2 CATCH BASIN,
WSDOT STD. PLAN B-10.20
MANHOLE ADJUSTMENT,
SEE DWG. NO. SS-4
6"
EXTEND PVC PIPE 6"
BEYOND CATCH
BASIN WALL FOR
GASKETED FITTING
FLEXIBLE RUBBER
BOOT WITH
NON-SHRINK GROUT
CITY OF PASCO - STANDARD DETAIL TYPE 2 CATCH BASIN SD-2
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12" UNDERDRAIN INFILTRATION PIPE S=0.00
5'
5'
1.5' MIN.
2' MIN.
STORM SEWER PIPE
TYPE 2 CATCH
BASIN, SEE
DWG. NO. SD-2
12" PVC PIPE, SEE
DWG. NO. SD-2
12" PVC x HDPE
TRANSITION COUPLING
DRAIN ROCK ENVELOPE. SEE
DETAIL BELOW
ANGULAR DRAIN ROCK , SEE
PASCO SPECIFICATION 7-05.2
DRAIN ROCK
12" PERFORATED
UNDERDRAIN
INFILTRATION PIPE
GEOTEXTILE FABRIC
ALL AROUND, LAP
MIN. 2'
COMPACT TO 95%
CROSS SECTION
CAP AT END
FILTER SOCK AROUND
PIPE
SIDE VIEW
~~
TREATMENT SOIL AS REQUIRED TO
MEET ECOLOGY U.I.C. REQUIREMENTS
1'
CITY OF PASCO - STANDARD DETAIL INFILTRATION TRENCH SD-3
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PRECAST ECCENTRIC
CONE
1/2" PER FT.
NOTES:
1.THE INSIDE JOINT SURFACE SHALL BE GROUTED. GROUT ALL LIFT AND LADDER RUNG HOLES.
2.ALL CHANNELIZATION OF MANHOLE BASES SHALL BE FULLY COVERED BY A RIGID MATERIAL DURING CONSTRUCTION OF ROAD
SURFACES TO PREVENT FOREIGN MATERIALS FROM ENTERING SYSTEM.
3.FOR MANHOLES LESS THAN 5'-0" USE FLAT TOP MANHOLE WITH TRAFFIC BEARING LID.
4.FOR CAST-IN-PLACE MANHOLES, THE CHANNEL SHALL BE FITTED WITH A SAND COLLAR. FOR PRECAST MANHOLES, THE CHANNEL SHALL
BE FITTED WITH AN A-LOK PREMIUM GASKET. CORE DRILL HOLE SHALL BE FITTED WITH A SAND COLLAR.
5.FOR STRAIGHT THRU MANHOLES, THE INVERT ELEVATION SHALL HAVE A .10' OF FALL FROM THE INLET TO THE OUTLET. FOR MANHOLES
WITH A BEND OR CHANGE IN DIRECTION, THE INVERT ELEVATION SHALL HAVE .20' OF FALL FROM THE INLET TO THE OUTLET.
6.RE-CHANNEL BASE IF INLET OR OUTLET PIPES DO NOT ALIGN WITH EXISTING MANHOLE CHANNEL.
7.PIPE ALIGNMENT INTO AND FROM MANHOLE SHALL HAVE 0° DEFLECTION.
8.MANHOLE SHALL NOT INCLUDE STEPS.
TOP OF BENCH TO BE
LEVEL WITH TOP OF PIPE
ENTERING MANHOLE
MORTAR FILL
CAST-IN-PLACE OR PRECAST BASE
(SEE WSDOT STD. PLAN B-15.20)
(SEE NOTE 2)
GROUT
INSIDE
JOINT
MANHOLE PLAN
NEW BASE
STANDARD MANHOLE FRAME AND
COVER, SEE DWG. NO. SS-2
MANHOLE ADJUSTMENTS
SEE DWG. NO. SS-4
CONFINED GROOVE JOINT
WITH RUBBER GASKET
MANHOLE PLAN
CORE DRILLING INTO EXISTING
CUT INTO OTHER SIDE
OF EXISTING
CHANNEL AND SHAPE
DOWNSTREAM EDGE
SLOPE:
CUT INTO SHELF
SUFFICIENTLY TO ALLOW
CAMERA ACCESS.
CAST-IN-PLACE PRECAST
6"6" MIN.
6" MIN.
6" MIN.
48"
4" MIN
4" MIN, 18" MAX
MANHOLE FOR 8" TO 21" PIPE
CHANNEL
WIDTH TO
MATCH PIPE
DIAMETER
6" OF BASE ROCK. (CSBC)
COMPACTED TO 95% DENSITY
(ASTM D698)
TONGUE AND
GROOVE JOINT
WITH MASTIC
CITY OF PASCO - STANDARD DETAIL STANDARD MANHOLE SS-1
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FRAME
LOCKING COVER
1/2" THICK
WEBS
NON-SKID
PATTERN
2" LETTERS
(SEE NOTE 4)
1" DIA. HOLE
CAST IRON STYLERING & COVER
IN LOCKED POSITION
25" - 25-1/8"
1"
3/8"
34-3/4" MIN.
26-3/8"
OPENING 25-1/4"
6"
1"
3/4"
5"23-3/4"
1-1/4"NOTES:
1.COVER WEIGHT-MIN. 150 LBS.
FRAME WEIGHT-MIN. 185 LBS.
2.MACHINE COVER SEAT & COVER FACE.
3.LOADING-40,000 LBS. HEAVY (H-40 RATING) TRAFFIC LOADING
4.MANHOLE COVERS TO BE LETTERED AS "WATER,'' "SEWER,'' OR
"STORM'' AS REQUIRED BY TYPE OF APPLICATION. ALSO COVERS
SHALL HAVE RAISED 2" LETTERS WITH THE WORDS "CITY OF
PASCO".
COVER
NON-SKID
PATTERN
2" LETTERS
(SEE NOTE 4)
1" DIA. HOLE
1"
3/8"
25" - 25-1/8"
CITY OF PASCO - STANDARD DETAIL MANHOLE FRAME AND COVER
(LOCKING & NON-LOCKING)SS-2
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STAINLESS STEEL
STRAP AND FITTINGS
STAINLESS STEEL
STRAP AND FITTINGS
SLOPE TO MANHOLE
WATERTIGHT FLEXIBLE
GASKET A-LOK OR EQUAL
WATERTIGHT FLEXIBLE
GASKET A-LOK OR EQUAL
FLOW
CONTROL
DENSITY FILL
CROSS
CONTROL
DENSITY
FILL
STAINLESS STEEL
STRAP AND FITTINGS
PIPE TO BE CUT FLUSH
AND GROUTED.
RISER
SEWER CLEANOUT
FRAME & COVER,
SEE DWG. NO. SS-8
CLASS 3000
CEMENT CONCRETE
NOTES:
1.STAINLESS STEEL STRAP AND CONNECTOR BOLTS, OR ANCHORS, SHALL BE INSTALLED, A MINIMUM OF 2, SPACING NOT TO
EXCEED 36 INCHES.
2.DROP CONNECTION PIPE DIAMETER AND FITTINGS SHALL BE EQUAL TO OR GREATER THAN THE DIAMETER OF THE SEWER MAIN.
3.DROP CONNECTION SHALL ONLY BE USED WITH APPROVAL FROM THE CITY ENGINEER.
4.ALL PIPE AND FITTINGS AND SHALL BE PVC CONSISTENT WITH STANDARD SPECIFICATIONS SECTION 7-17.
6"
6" OF BASE ROCK. (CSBC)
COMPACTED TO 95% DENSITY
(ASTM D698)
90° ELBOW
18" MIN.
1/2 PVC PLUG,
REMOVABLE
12"
18" MIN.
CITY OF PASCO - STANDARD DETAIL STANDARD DROP MANHOLE SS-3
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NOTE:
BOLLARDS MAY BE REQUIRED BY CITY ENGINEER.
INSTALL CONCRETE
CONCRETE COLLAR WITH
LIGHT BROOM FINISH
GRADE RINGS
COVER WEARBARS ARE TO
BE FLUSH WITH EXISTING
FINISHED GRADE
CRUSHED SURFACING TOP
COURSE OR NATIVE MATERIAL
COMPACTED TO 95%
ASTM D698
MANHOLE FRAME & COVER
SEE DWG. NO. SS-2
ADJUSTMENTS 2" OR GREATER ARE TO BE MADE
WITH PRECAST CONCRETE ADJUSTMENT RINGS
WITH GROUT BETWEEN EACH EACH RING, FINISHED
INSIDE. ANY ADJUSTMENT THAT IS LESS THAN 2" IS
TO BE MADE WITH METAL SHIMS ONLY
OVERALL FACE ALIGNMENT +/-1/2"
INSTALL 2.5" DEPTH
COMMERCIAL HMA, 12"
WIDE. MATCH NEW HMA
W/EXISTING ACP SURFACE
AND M.H. FRAME. TACK
EDGE & CONCRETE PRIOR
TO PLACING HMA.
4" MIN.
18" MAX.
UNPAVED AREAS PAVED AREAS
CLASS 3000
12" WIDE X 6" THICK
CONCRETE COLLAR
CLASS 3000
12" WIDE x 8" THICK
CONCRETE COLLAR
CITY OF PASCO - STANDARD DETAIL MANHOLE ADJUSTMENTS SS-4
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PIPE ZONE
2'
6" MIN.
6" MIN.
6" MIN.
SEE DWG. NO. ST-3 FOR
TRENCH SURFACING REPAIR,
INCLUDING SAWCUT REQUIREMENTS
PIPE BEDDING MUST BE
COMPACTED TO 95% MIN.
(ASTM D698)
DETECTABLE
MARKING
TAPE
SEE SPECIFICATIONS FOR
ADDITIONAL REQUIREMENTS AT
ALL LOCATIONS SEWER PIPE
CROSSES OVER WATER MAIN.
PIPE BACKFILL MUST BE
COMPACTED TO 95% MIN.
(ASTM D698)
CITY OF PASCO - STANDARD DETAIL TYPICAL SEWER/STORM DRAIN
TRENCH SECTION SS-5
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SANITARY SEWER MAIN
SIDE SEWER
TEE-WYE (STD)18" MIN.SIDE SEWER
WYE (AS REQUIRED)
SEE NOTE 2R/W or ESM'T LINE5' MIN.PLACE DETECTABLE
MARKER TAPE 12" ABOVE
ENTIRE LENGTH OF SIDE
SEWER
MIN SLOPE - SEE NOTE
PLUG OR CAP
AS REQUIRED 45° TYP
TEE-WYE
22 1/2° OR 45° BENDS
AS REQUIRED
MIN SLOPE - SEE NOTE
VARIESTEE-WYE
22 1/2°
MIN SLOPE - SEE NOTE
OBSTRUCTION
IN THIS AREAFLOWAA
SECTION A-A
PLAN VIEW
NOTES:
1.SIZES OF SERVICE PIPE AND FITTINGS SHALL BE AS
INDICATED ON THE DRAWINGS.
2.SIDE SEWER SERVICE SHALL BE EXTENDED 5' BEYOND
THE PROPERTY LINE OR EASEMENT LINE, WHICHEVER IS
FURTHER AND MARKED WITH AN 8' TREATED 2x4 INSIDE
AN 8' STEEL STUD, PAINTED GREEN, EXTENDING 36-48"
ABOVE FINISHED GROUND SURFACE. MARKER BOARD
TO BE CUT OFF FLUSH WITH THE GROUND IN ALREADY
ESTABLISHED AREAS.
3.NO GLUED FITTINGS IN RIGHT-OF-WAY.
4.SERVICE CONNECTIONS 8" OR LARGER SHALL BE
APPROVED BY CITY ENGINEER AND MUST BE MADE AT
MANHOLE.
5.SIDE SEWER CONNECTIONS TO NEW SANITARY SEWER
MAINS SHALL BE MADE WITH TEE-WYES, TEES, OR WYES
AS DIRECTED. ALL CONNECTIONS TO THE STUBS AND
EXISTING SEWER MAINS SHALL BE MADE WITH "RIGID
TYPE" COUPLERS. ANY DEVIATIONS FROM THIS SHALL
BE APPROVED BY THE CITY ENGINEER PRIOR TO USE.
6.WHERE DEPTH IS INSUFFICIENT TO ALLOW CONNECTION
AS SHOWN, CONNECT SERVICE AS DIRECTED BY
ENGINEER.
7.ALL SIDE SEWER MATERIALS SHALL BE PVC SEWER PIPE
CONFORMING TO THE REQUIREMENTS OF SECTION
7-18.2 OF THE STANDARD SPECIFICATIONS.
8.MINIMUM SLOPES ARE AS FOLLOWS:
4" DIA. PIPE = 0.02 ft/ft
6" DIA. PIPE = 0.01 ft/ft
5' MIN.
CONNECTION AT OBSTRUCTION
12-GAUGE GREEN TRACER
WIRE FROM SEWER MAIN
TO MARKER POST
CITY OF PASCO - STANDARD DETAIL SEWER STUB INSTALLATION
(NEW AND EXISTING MAIN)SS-6
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PRECAST ECCENTRIC
CONE
NOTES:
1.THE INSIDE JOINT SURFACE SHALL BE GROUTED. GROUT ALL LIFT AND LADDER RUNG HOLES.
2.ALL CHANNELIZATION OF MANHOLE BASES SHALL BE FULLY COVERED BY A RIGID MATERIAL DURING CONSTRUCTION OF ROAD
SURFACES TO PREVENT FOREIGN MATERIALS FROM ENTERING SYSTEM.
3.FOR MANHOLES LESS THAN 5'-0" USE FLAT TOP MANHOLE WITH TRAFFIC BEARING LID.
4.THE MANHOLE PIPE CONNECTIONS SHALL BE FITTED WITH SAND COLLARS.
5.MATCH CROWN OF EXISTING PIPE WITH NEW SEWER PIPE.
6.EITHER FORM RECESS IN CAST-IN-PLACE BASE OR SET RISER SECTION IN CAST-IN-PLACE BASE TO DEPTH OF JOINT, EQUAL
DEPTH ALL AROUND.
7.PIPE ALIGNMENT INTO MANHOLE SHALL HAVE 0° DEFLECTION.
8.MANHOLE SHALL NOT INCLUDE STEPS.
9.THE EXISTING PIPE SURFACE SHALL BE CLEAN AND COATED WITH A BONDING AGENT PRIOR TO POURING BASE.
GROUT
INSIDE
JOINT
STANDARD MANHOLE FRAME AND
COVER, SEE DWG. NO. SS-2
MANHOLE ADJUSTMENTS
SEE DWG. NO. SS-4
CONFINED GROOVE JOINT
WITH RUBBER GASKET
6" MIN.
48"
FOR UP TO 24"
EXISTING PIPE
4" MIN
4" MIN, 18" MAX
TONGUE AND
GROOVE JOINT
WITH MASTIC
PRECAST
BARREL
(TYP.)
6"
4"
#5 @ 12" O.C. EACH WAY
6" OF BASE ROCK. (CSBC)
COMPACTED TO 95% DENSITY
(ASTM D698)
3"2' MIN.
MOTAR FILL, TYP.
6"
REMOVE TOP OF PIPE,
FLUSH WITH CONCRETE
EXISTING SEWER PIPE
3"
8"
PROPOSED
SEWER PIPE
SLOPE, 1/2" PER FOOT
CAST-IN-PLACE CEMENT
CONCRETE BASE, CL 4000
CITY OF PASCO - STANDARD DETAIL DOGHOUSE MANHOLE SS-7
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3" MIN
2'-0" DIA.
NOTES:
1.CAST IRON FRAME & COVER SHALL BE
EAST JORDAN IRON WORKS, MODEL
3661, MARKED "CLEANOUT" OR
APPROVED EQUAL
2.CLEANOUT PIPE SHALL BE 8" DIA. PVC
SEWER PIPE IN ACCORDANCE W/ THE
STANDARD SPECS.
3.CLEANOUTS SHALL ONLY BE APPROVED
FOR PHASED DEVELOPMENT AT SEWER
EXTENSION LOCATION.
2.5" COMMERCIAL HMA
ASPHALT CONCRETE
PAVEMENT CLASS 3000 CEMENT
CONCRETE, 12" WIDE X 8"
THICK CONCRETE COLLAR
TOP OF
SUBGRADE
45° ELBOW
12"Ø PVC PIPE
PVC THD PLUG WITH NUT,
INTO PVC SLPxFEMALE
THD COUPLING
UNPAVED AREASPAVED AREAS
CLASS 3000 CEMENT
CONCRETE, 12" WIDE X 6"
THICK CONCRETE COLLAR
45° ELBOW
CITY OF PASCO - STANDARD DETAIL SEWER CLEANOUT SS-8
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PERMANENT CONTROL MONUMENTS SHALL BE ESTABLISHED AT:
1.THE CENTERLINE INTERSECTIONS OF ALL ROADS WITHIN THE SUBDIVISION.
2.THE BEGINNING AND END OF CURVES ON CENTERLINES.
MONUMENT FRAME &
COVER LABELED 'MON'
MIN. 2-1/2" DIA., POLISHED,
BRASS OR ALUMINUM
MONUMENT CAP
HOT MIX ASPHALT
CL. 3000 CONCRETE WITH
LIGHT BROOM FINISH
COMPACTED
CRUSHED
SURFACING
BASE COURSE
6" MIN.
CL. 3000 CONCRETE
UNDISTURBED SUBGRADE
CONCRETE FILLED 4" DIA.
PVC PIPE, MIN. 2'-6" LONG
10" DIA. x 6" SECTION OF
PVC PIPE AS FORM FOR
CONCRETE OUTER RING
CL. 3000 CONCRETE
COLLAR
CRUSHED
SURFACING
TOP COURSE
8" MIN.
12" TYP.
6"
MIN.
6"
4" TYP.
3" TYP.
WASHINGTON LICENSED PROFESSIONAL LAND SURVEYOR TO REFERENCE MONUMENT LOCATION FOR INSTALLATION AND PUNCH CAP
AFTER INSTALLATION. THE MONUMENT CAP SHALL BE SET IN SUCH A FASHION AS TO ENSURE THAT THE PUNCH MARK IS ON THE
MONUMENT CAP.
CITY OF PASCO - STANDARD DETAIL MONUMENT CASE & COVER ST-1
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LOCAL ACCESS STREETS
TOP BACK OF CURB TO TOP BACK OF CURB
2%2%
5' RESIDENTIAL
SIDEWALK
2" CRUSHED SURFACING TOP COURSE
2-1/2" HOT MIX ASPHALT CL. 1/2" PG 64S-28
5' RESIDENTIAL SIDEWALK6" CRUSHED SURFACING
BASE COURSE
TYPE "A" CURB AND GUTTER
60' R/W
39'
95% COMPACTED SUBGRADE
1' TYP.
2%2%
3:13:1
3:13:1
2-1/2" HOT MIX ASPHALT CL. 1/2" PG 64S-28
2" CRUSHED SURFACING
TOP COURSE
6" CRUSHED SURFACING
BASE COURSE
LOCAL ACCESS STREETS W/O CURBS
40'
60' R/W
2' CSTC SHOULDER,3" DEPTH95% COMPACTED SUBGRADE
LANES:
2-12' TRAVEL LANES
2-8' PARKING LANES
NOTE 2
LANES:
2-10' TRAVEL LANES
2-8' PARKING LANES
2' CSTC SHOULDER,3" DEPTHCITY OF PASCO - STANDARD DETAIL TYPICAL STREET SECTIONS
LOCAL ACCESS ST-2A
NOTES:
1.ALL ASPHALT AND ROCK DIMENSIONS SHALL BE MINIMUM THICKNESS, COMPACTED DEPTHS.
2.ROADSIDE SWALE SHOULD BE A MINIMUM OF 6 FEET WIDE.
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2%
2" CRUSHED SURFACING TOP COURSE
3" HOT MIX ASPHALT CL. 1/2" PG 64S-28
7' COMMERCIAL
SIDEWALK
PARTIAL STREET SECTION MUST HAVE PRIOR APPROVAL OF THE CITY ENGINEER
6" CRUSHED SURFACING BASE COURSE
PARTIAL STREET (ARTERIAL/COLLECTOR)
3:1 3:1 2' CSTCSHOULDER,3" DEPTH2%
60' R/W
29.5'
TO TOP BACK OF CURB
95% COMPACTED SUBGRADE
NOTES:
1.ALL ASPHALT AND ROCK DIMENSIONS SHALL BE MINIMUM THICKNESS, COMPACTED DEPTHS.
2.ROADSIDE SWALE SHOULD BE A MINIMUM OF 6 FEET WIDE.
2%
CRUSHED SURFACING TOP COURSE*
HOT MIX ASPHALT CL. 1/2" PG 64S-28*
5' RESIDENTIAL
SIDEWALK
PARTIAL STREET SECTION MUST HAVE PRIOR APPROVAL OF THE CITY ENGINEER
CRUSHED SURFACING BASE COURSE*
PARTIAL STREET (LOCAL ACCESS)
2%
60' R/W
29.5'
TO TOP BACK OF CURB
95% COMPACTED SUBGRADE
*MATCH STREET CLASSIFICATION PAVEMENT SECTION COMPACTED DEPTHS
2%
10'
1'
1'2' CSTCSHOULDER,3" DEPTHTYPE "A" CURB AND GUTTER
TYPE "A" CURB AND GUTTER
CITY OF PASCO - STANDARD DETAIL TYPICAL STREET
SECTIONS PARTIAL ST-2B
R: 09/06/2019Page 159 of 187
2%2%7' COMMERCIALSIDEWALK3" HOT MIX ASPHALT CL. 1/2" PG 64S-28 (4" - TRUCK ROUTE)2" CRUSHED SURFACING TOP COURSE8" CRUSHED SURFACING BASE COURSE7' COMMERCIALSIDEWALKCOLLECTORMINOR ARTERIAL2%2%7' COMMERCIALSIDEWALK3" HOT MIX ASPHALT CL. 1/2" PG 64S-28 (4" - TRUCK ROUTE)2" CRUSHED SURFACING TOP COURSE8" CRUSHED SURFACING BASE COURSE7' COMMERCIALSIDEWALK1' TYP.39' - 49' TO TOP BACK OF CURB1' TYP.69' TO TOP BACK OF CURB60'-80' R/W80'-100' R/W95% COMPACTEDSUBGRADE95% COMPACTEDSUBGRADENOTE:ALL ASPHALT AND ROCK DIMENSIONS SHALL BE MINIMUM THICKNESS, COMPACTED DEPTHS.LANES:4-11' TRAVEL LANES1-12' TWO WAY LEFT TURN (TWLT) LANE2-5' BIKE LANESLANES:2-12' TRAVEL LANES1-12' TWO WAY LEFT TURN (TWLT) LANE2-5' BIKE LANES (AS DIRECTED BY CITY ENGINEER)TYPE "A" CURB AND GUTTERTYPE "A" CURB AND GUTTERCITY OF PASCO - STANDARD DETAILTYPICAL STREET SECTIONSARTERIAL AND COLLECTORST-2CR: 09/06/2019Page 160 of 187
UNSURFACED AREAS
1'-0"
HMA PAVEMENT REPAIR GRAVEL SURFACING
1'-6"
(MIN)
1'-6"1'-6"
GRAVEL REPAIR LIMITS
EXCAVATION
LIMITS
NOTES:
1.CONTRACTOR SHALL BE RESPONSIBLE FOR ALL TRENCH SURFACE RESTORATION BEYOND THE LIMITS SHOWN,
INCLUDING WIDER TRENCH SECTIONS RESULTING FROM LAYING BACK TRENCH SIDES AT THE CONTRACTORS
OPTION.
2.NO AREA REQUIRING ASPHALT CONCRETE SURFACING REPAIR SHALL REMAIN UNPAVED FOR MORE THAN FIVE
WORKING DAYS FOLLOWING INITIAL EXCAVATION.
3.ALL THICKNESSES ARE COMPACTED DEPTHS.
(MIN)
1'-6"1'-6"1'-6"
HOT MIX ASPHALT PATCH LIMITS
SYMMETRICAL
ABOUT ℄ OF PIPE
1'-0"
COMPACTED
BACKFILL
COMPACTED
BACKFILL
SAWCUT PRIOR
TO REPAIR
EXISTING PAVEMENT
SURFACING DEPTH
VARIES
EXCAVATION
LIMITS
EXISTING PAVEMENT
SURFACING DEPTH
VARIES
SAWCUT PRIOR
TO REPAIR
ALTERNATE
BACKSLOPE AT
CONTRACTORS
OPTION
4" CRUSHED
SURFACING
TOP COURSE
3" HMA, CL. 1/2"
PG 64S-28*
10" CRUSHED
SURFACING
BASE COURSE
ALTERNATE
BACKSLOPE AT
CONTRACTORS
OPTION
ALTERNATE
BACKSLOPE AT
CONTRACTORS
OPTION
EXISTING
GROUND
12" MIN. SILT MATERIAL FREE
FROM ROCKS. STORE IN
STOCKPILE WHEN REMOVED
DURING TRENCHING
OPERATIONS. REPLACE TO
MINIMUM THICKNESS SHOWN.
IF EXISTING GROUND
SURFACE ADJACENT TO
TRENCH DOES NOT INCLUDE
SILT OVERBURDEN, THEN
BACKFILL TO SURFACE WITH
NATIVE MATERIAL
EXCAVATED FROM TRENCH.
EXCAVATION
LIMITS
* 4" HMA DEPTH ON
TRUCK ROUTES
CITY OF PASCO - STANDARD DETAIL TRENCH SURFACING REPAIR ST-3
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4" CRUSHED SURFACING TOP COURSE
5' RESIDENTIAL
7' COMMERCIAL
CROSS SLOPE 2% MAX. / 1% MIN.
SEE DWG. NO. ST-6
FOR CURB DETAILS
4" CEMENT CONCRETE
NOTES:
1.JOINTS ON SIDEWALKS EVERY 5' (FEET) OR AS REQUIRED TO MATCH EXISTING IMPROVEMENTS (CUT 3/4" MIN. DEEP FOR AGGREGATE
SEPARATION). THE JOINTS SHALL MATCH CURB JOINTS AND BE PERPENDICULAR TO THE CURB.
2.SIDEWALK EXPANSION JOINTS USING 1/2" MASTIC ARE REQUIRED AT 30' SPACING, ALL CURB RETURNS, THE TOP AND BOTTOM OF ALL
DRIVEWAY TRANSITIONS, AND AT EXISTING CONCRETE.
3.ALL 1/2" MASTIC TO BE FULL DEPTH PENETRATION AND FLUSH WITH THE FINISHED SURFACE.
4.IF THE THREAT OF RAIN OR BLOWING SAND IS PRESENT, SURFACES SHALL BE COVERED WITH 6-MIL POLY SHEETING. IF THE THREAT OF
FREEZING IS PRESENT, THE WORK SHALL BE COVERED WITH THERMAL CURING BLANKETS FOR A PERIOD OF SEVEN (7) DAYS.
5.CRUSHED SURFACING TOP COURSE AND SUBGRADE SHALL BE COMPACTED TO A MINIMUM OF 95% OF ASTM D1557.
6.HEADERBOARD BULKHEADS TO BE INSTALLED PRIOR TO FORM INSPECTION.
7.SIDEWALKS BEHIND MOUNTABLE AND DEPRESSED CURB SHALL HAVE 6" THICK CONCRETE.
8.SLOPE ALL SURFACES (I.E. LANDSCAPE WHERE DETACHED SIDEWALK) AT 2% FROM RIGHT OF WAY TO BACK OF CURB.
CITY OF PASCO - STANDARD DETAIL CEMENT CONCRETE
SIDEWALK ST-4
R: 09/06/2019Page 162 of 187
NOTES:1.USE OF COMMERCIAL APPROACH - TYPE 2 BY APPROVAL OF CITY ENGINEER ONLY.2.CURB & GUTTER, VALLEY GUTTER, & CONCRETE APPROACH SHALL BE SEPARATED BY 3/8" THICK EXPANSION JOINT MATERIAL.3.THIS DETAIL INDICATES GENERAL CONFIGURATION REQUIREMENTS FOR COMMERCIAL DRIVEWAY APPROACHES. STYLE AND LOCATIONOF HANDICAP RAMPS WILL DEPEND UPON SITE CONDITIONS AND SHALL BE CONSTRUCTED ACCORDING TO THE SPECIFIC PROJECT SITEPLAN APPROVED BY THE CITY ENGINEER.4.WSDOT CLASS 3000 CONCRETE WITH COARSE AGGREGATE GRADING NO. 5.5.DUE TO THE MINIMUM SIZE RADIUS OF 15', SPECIAL CONSIDERATIONS NEED TO BE MADE TO ALLOW FOR ADA PROVISIONS ON THE RAMPS.15' RADIUS DESIGNS MUST BE SUBMITTED AND APPROVED BY THE CITY ENGINEER PRIOR TO CONSTRUCTION.3' VALLEYGUTTER1'SECTION A2% MAX.1% MIN.1/2 DRIVEWAY WIDTHDISTANCE VARIESSEE PMC 12.04.100LC6" CEMENT CONCRETERESIDENTIAL APPROACHMIN. 2" CSTC(COMPACTED DEPTH)COMMERCIAL APPROACH - TYPE 115' (MIN)CURB RAMP, SEE WSDOTSTD. PLAN F-40.16.15' (MIN)WIDTH PER PMC12.04.1001'3'RPAARPSEE PLANSEE PLAN2% MAX.1% MIN.1/2 DRIVEWAY WIDTH(12' MINIMUM)6" CEMENT CONCRETE(INCLUDING APRON)MIN. 3" CSTC (COMPACTED DEPTH)(INCLUDING APRON)COMMERCIAL APPROACH - TYPE 2LC5' APRON orTO R/W LINE(WHICHEVER ISGREATER)CONCRETE7.5%CONCRETE APRON 7' MIN.OR TO R/W LINE(WHICHEVER IS GREATER)RAMP RUNNING SLOPESSHALL BE 7.5% MAX.1% MIN.2% MAX.VALLEY GUTTERCOLD JOINT (TYP)COLD JOINT (TYP)COLD JOINT (TYP)COLD JOINT (TYP)VALLEY GUTTERFLOW LINERAISED CURBING MAYCONTINUE INTO SITE6" CEMENTCONCRETEMIN. 3" CSTC(COMPACTED DEPTH)2% MAX.1% MIN.DETECTABLE WARNINGSURFACE, SEE WSDOTSTD. PLAN F-45.10.7.5%7.5%7.5%
CITY OF PASCO - STANDARD DETAIL DRIVEWAY APPROACHES ST-5
R: 09/06/2019Page 163 of 187
NOTES:
1.CONCRETE SHALL BE PER THE SPECIFICATIONS.
2.CUT JOINTS SHALL BE 10'-0" O/C.
3.EXPANSION MATERIAL (3/8" MASTIC) SHALL BE PLACED AT ALL CURB RETURNS.
4.BONDING AGENT TO BE FOUR (4) PARTS PORTLAND CONCRETE SLURRY TO ONE (1) PART DAYTON SUPERIOR J-40, OR
APPROVED EQUAL.
5.MATCH ROADWAY SLOPE. MAXIMUM COUNTER SLOPE SHALL BE 5.0%.
6.VALLEY GUTTER SHALL INCLUDE TWO (2) #4 REBAR.
TYPE "A" BARRIER CURB AND GUTTER
MATCH ROADWAY SLOPE
TYPE "D" DEPRESSED CURB AND GUTTER AT
DRIVEWAY DROP AND ADA RAMPS
VARIES 2%
1/2"R1/4"R
6"
18"
5/8"
6"
SEE NOTE 5
12"
5-1/2"
1/2"
18"
6"
1"R
5/8"
STAB MIN. 3"
TYP. EVERY CUT
JOINT
CEMENT CONCRETE VALLEY GUTTER7"1/2" R1/2" R
25"11"
FLOW
LINE
9/16"7"12"7"36"
TAPER
TO ZERO
EXPANSION JOINT
CURB TERMINAL END
REBAR, SEE NOTE 6
CITY OF PASCO - STANDARD DETAIL CEMENT CONCRETE CURBS ST-6
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2%2%5' RESIDENTIAL
SIDEWALK
2" CRUSHED SURFACING TOP COURSE
2-1/2" HOT MIX ASPHALT CLASS 1/2" PG 64S-28 5' RESIDENTIAL
SIDEWALK
6" CRUSHED SURFACING BASE COURSE
CUL-DE-SAC CROSS SECTION (WITH CURB)
DEPRESSED CURB AND GUTTER
NOTE:
*SIDEWALKS BEHIND DEPRESSED CURB
SHALL HAVE 6" THICK CONCRETE.
LOCAL ACCESS STREET - 90' DIA.
95% COMPACTED SUBGRADE
1' TYP.
NOTE:
CUL-DE-SAC STREETS
SHALL BE A MAXIMUM OF
600 FEET IN LENGTH.
PLAN VIEW
55' MIN.
CL
TOP BACK
OF CURB
R=25'
DEPRESSED
CONCRETE
CURB AND
GUTTER*
RIGHT-OF-WAY:
R=20'10'
UTILITY
EASEMENT
CONCRETE
SIDEWALK
NOT TO SCALE
TOP
B
A
C
K
C
U
R
B
R=45'
MI
N.
SEE
PLANS
SEE PLANS FOR
ROADWAY
WIDTH
CUL-DE-SAC CROSS SECTION (WITHOUT CURB)
LOCAL ACCESS W/O CURBS STREET - 80' DIA.
2%2%
MIN. 8' CSTC
SHOULDER
2" CRUSHED SURFACING TOP COURSE
2-1/2" HOT MIX ASPHALT CLASS 1/2" PG 64-28
6" CRUSHED SURFACING BASE COURSE
95% COMPACTED SUBGRADE
3:1 3:1
2%
3:13:1
2%
MIN. 8' CSTC
SHOULDER
CITY OF PASCO - STANDARD DETAIL CUL-DE-SAC ST-7
NOTE:
ALL ASPHALT AND ROCK DIMENSIONS SHALL BE MINIMUM THICKNESS, COMPACTED DEPTHS.
R: 09/06/2019Page 165 of 187
CUT-IN TEE/CROSS
TAPPING SLEEVE AND VALVE
ADDITIONAL VALVES
MAY BE REQUIRED
THRUST BLOCK TO BE PER
DWG. NO. W-8
EXISTING WATER MAIN
FLANGED COUPLING ADAPTER
SEE SPECIFICATIONS
NEW WATER MAIN
FLANGE X MJ VALVE
RESILIENT SEATED GATE VALVE
SEE SPECIFICATIONS
THRUST BLOCK PER DWG. NO. W-8
EXISTING WATER MAIN
RESILIENT SEATED GATE MJ X FL TAPPING
VALVE, SEE SPECIFICATIONS
COUPLING ADAPTER AS REQUIRED
BY PIPE SIZE AND TYPE
TAPPING SLEEVE
SEE SPECIFICATIONS
2' MIN.
MINIMUM 10' LONG
TRENCH TO ALLOW FOR
CITY TAPPING MACHINE
TRENCH LIMIT
NOTES:
1.CONTRACTOR TO DIG & VERIFY PIPE SIZE AND MATERIAL PRIOR TO ORDERING MATERIALS.
2.MATERIALS TO BE ON THE JOB PRIOR TO SCHEDULING SHUTDOWNS OR TAPS. UP TO 48 HOURS NOTICE SHALL BE REQUIRED TO
SCHEDULE CITY CREWS FOR TAP.
3.MAXIMUM TAP TO EXISTING LINE NOT TO EXCEED 50% OF MAIN DIAMETER ON A.C. OR P.V.C. PIPE, EXCEPT C900/905.
4.FOR D.I., C.I. STEEL AND C-900/905 SIZE ON SIZE TAPPING TEES AND SADDLES ON MAINS SHALL BE TAPPED 1/2" UNDERSIZED.
5.CONTRACTOR TO EXCAVATE, INSTALL TAPPING SLEEVE AND VALVE PRIOR TO CITY CREW ARRIVAL, CITY CREW WILL COMPLETE
TAP, TAP FEE MAY BE REQUIRED. CONTRACTOR SHALL SUPPLY PROPER SLOPING/SHORING, ALONG WITH TABULATED DATA, PRIOR
TO CITY CREW ARRIVAL.
6.ONCE IN SERVICE, WATER SHALL NOT BE TURNED OFF WITHOUT APPROVAL FROM CITY ENGINEER OR CITY FIELD DIVISION
MANAGER.
7.IF WATER MAIN IS LESS THAN 6" DIAMETER, A CUT-IN TEE SHALL BE USED.
CITY OF PASCO - STANDARD DETAIL TAPPING WATER MAIN W-1
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FINISH GRADE
NOTES:
1. IF METER NOT INSTALLED, A PVC JUMPER CUT TO THE SIZE AND THREAD OF THE APPROPRIATE SERVICE SHALL BE PLACED BETWEEN ANGLE
METER STOP AND METER CHECK VALVE. DRILL TWO 3/16" HOLES IN JUMPER.
2.SEE DWG. W-20 FOR BEDDING.
3.BOXES TO BE SET PERPENDICULAR TO THE STREET, TOP OF BOX LEVEL WITH TOP BACK OF SIDEWALK.
4.ATTACH THE TWO BOX SECTIONS TOGETHER WITH #14 X 2-1/2" HEX WASHER HEAD ZINC COATED SELF TAPPING SCREW AT 2 EQUALLY SPACED
LOCATIONS ON THE LONG SIDE. SPREADER BAR TO BE BETWEEN THE TWO BOXES.
5.ALL SERVICE CONNECTIONS TO WATER MAIN, EXCEPT TO DUCTILE IRON PIPE CLASS 52 OR STRONGER SHALL BE MADE USING SADDLES AS
SPECIFIED AND BE OF THE SIZE AND TYPE SUITABLE FOR USE WITH THE PIPE BEING INSTALLED.
6.WATER SERVICE TAIL PIECE SHALL BE EXTENDED TO THE PROPERTY LINE OR EASEMENT LINE, WHICHEVER IS FURTHER, AND MARKED WITH AN 8'
TREATED 2x4 INSIDE AN 8' STEEL STUD, PAINTED BLUE, EXTENDING 36-48" ABOVE FINISHED GROUND SURFACE. MARKER BOARD TO BE CUT OFF
FLUSH WITH THE GROUND IN ALREADY ESTABLISHED AREAS.
7.WATER METER BOX TO HAVE 18" CLEARANCE FROM ANY CONCRETE OR ASPHALT DRIVEWAY, SIDEWALK, ETC.
8.DO NOT BURY ANGLE METER STOP BEFORE INSTALLING METER BOX.
9.NO COUPLINGS FROM MAIN TO ANGLE METER STOP OR FROM ANGLE METER CHECK TO TERMINATION AT EASEMENT LINE.
10.COPPER SERVICE TO BE SET TO GRADE BEFORE WATER IS TURNED ON.
11.BACKFLOW PREVENTION SHALL BE A REDUCED PRESSURE BACKFLOW ASSEMBLY FOR COMMERCIAL WATER SERVICES. THIS REQUIREMENT MAY
BE REDUCED OR WAIVED UPON WRITTEN REQUEST TO THE CITY ENGINEER. BACKFLOW ASSEMBLY AND FITTINGS ARE TO BE LEAD FREE.
12.PROPERTY OWNER RESPONSIBLE FOR ACCESS TO VALVE (VALVE BOX/CAN) AND FREEZE PROTECTION. SEE SPECIFICATIONS.
13.THESE BACKFLOW PREVENTION ASSEMBLY INSTALLATION STANDARDS REFLECT MINIMUM REQUIREMENTS TO COMPLY WITH WASHINGTON
DEPARTMENT OF HEALTH REGULATIONS (WAC 246-290-490) AND UNIFORM PLUMBING CODE. UNAPPROVED DEVIATION MAY RESULT IN THE CITY
REJECTING THE INSTALLATION AND THE CERTIFICATE OF OCCUPANCY AS WELL. ALL REQUESTS FOR DEVIATION TO THESE STANDARDS MUST BE
SUBMITTED IN WRITING AND APPROVED BY THE CITY'S CROSS CONNECTION SPECIALIST.42" MIN.30° -
45°
1" METER CHECK VALVE,
SEE SPECIFICATIONS
SEE NOTE 1
1" ANGLE METER STOP, SEE SPECIFICATIONS
SEE NOTE 3
SEE NOTE 4
EXTEND PLAIN END TAIL PIPE.
SEE NOTE 7
1" "K" TYPE COPPER PIPE
METER BOX, SEE
SPECIFICATIONS
WATER MAIN
PVC TAP, WITH
HORIZONTAL S-CURVE
SERVICE SADDLE,
SEE SPECIFICATIONS
CORPORATION STOP,
SEE SPECIFICATIONS
DUCTILE TAP
ONLY
1" "K" TYPE
COPPER PIPE
12"
36"42" MIN.6"
WATER MAIN
1" PVC JUMPERTO BUILDING
1"x1" THxSLP
3/16" HOLES
2 EACH
11"
WHITE INTERNAL LINER
SCREW
SPREADER BAR 11"WATER MAINSIDEWALK18"R/W LINECURB FACETO HOUSE/BUSINESS
TO IRRIGATION SYSTEM
(IF APPLICABLE)UTILITY ESMT.BACKFLOW
PREVENTOR, LOCATE
OUT OF R/W OR ESMT.
IRRIGATION CONNECTION ONLY IF NO
IRRIGATION SERVICE IS AVAILABLE
AND SHALL BE LEAD FREE
24"-36"
36"
R.S. VALVE
WATER SERVICE
METER BOX
CITY OF PASCO - STANDARD DETAIL RESIDENTIAL AND 1"
COMMERCIAL WATER SERVICE W-2
R: 09/06/2019Page 167 of 187
TO MAIN
MAIN
TO METER
TO BUILDING
TAPPING SADDLE,
SEE SPECIFICATIONS
CORPORATION STOP,
SEE SPECIFICATIONS
2" GALVANIZED PIPE AND FITTING
SWING JOINT. LENGTH OF NIPPLE VARIES
DEPENDING ON SITUATION APPROX. AT 45°
TO THE RIGHT SIDE FACING THE MAIN. SWING
JOINT MAY BE LAID ON ITS SIDE TO MEET
DEPTH REQUIREMENTS.
SEE NOTE 4
GALV. TO EASEMENT
2" METER CHECK VALVE,
SEE SPECIFICATIONS
HEIGHT OF RISERS DEPENDS ON
SITUATION, BUT SHALL NOT BE
LESS THAN 3'.2" GALVANIZED OR PEXa PIPE AND FITTINGS
2" METER ANGLE STOP,
SEE SPECIFICATIONS
NOTES:
1.IF METER NOT INSTALLED, A GALVANIZED JUMPER CUT TO THE SIZE AND THREAD OF THE APPROPRIATE SERVICE SHALL BE PLACED
BETWEEN THE ANGLE METER STOP AND METER CHECK VALVE. DRILL TWO 3/16" HOLES IN JUMPER.
2.SMALLER METER SIZES REDUCED IN BETWEEN ANGLE METER STOP AND METER.
3.DO NOT BURY METER ANGLE STOP BEFORE INSTALLING METER BOX.
4.WATER SERVICE TAIL PIECE SHALL BE EXTENDED TO THE PROPERTY LINE OR EASEMENT LINE, WHICHEVER IS FURTHER, AND MARKED
WITH AN 8' TREATED 2x4 INSIDE AN 8' STEEL STUD, PAINTED BLUE, EXTENDING 36-48" ABOVE FINISHED GROUND SURFACE. MARKER BOARD
TO BE CUT OFF FLUSH WITH THE GROUND IN ALREADY ESTABLISHED AREAS.
5.WATER METER BOX TO HAVE 18" CLEARANCE FROM ANY CONCRETE OR ASPHALT DRIVEWAY, SIDEWALK, ETC. THE ISOLATION VALVE SHALL
BE NO LESS THAN 36" FROM THE METER BOX.
6.WATER METER BOX SHALL HAVE A WHITE RESIN INTERNAL LINER.
7.BOXES ARE TO BE SET PERPENDICULAR TO THE STREET.
8.IF PEXa IS INSTALLED, TRACER WIRE SHALL BE WRAPPED AROUND PIPE FOR LENGTH OF SERVICE TO MARKER POST.
17"
METER
16" ±1"
3'
3" MIN.
PEXa TAP
CITY OF PASCO - STANDARD DETAIL 2" SERVICE INSTALLATION W-3
R: 09/06/2019Page 168 of 187
WATER MAIN
WATER
LID DETAIL
EXTENSION PIECE DETAIL
UNIMPROVEDIMPROVED
MATCH NEW HMA WITH
EXISTING HMA
(CONCRETE COLLAR IN
UNIMPROVED AREAS)
SEE LID DETAIL
SEE EXTENSION PIECE DETAIL
VALVE OPERATING EXTENSIONS
SHALL BE INSTALLED TO PROVIDE
A 4 FOOT OPERATING DEPTHTRACER WIRE #12 GAUGE
COPPER WIRE WITH UF
INSULATOR COLOR BLUE
2" GAP
TIGHTLY WRAP WIRE 3 FULL TURNS
BELOW VALVE OPERATOR FLANGE ON
GATE VALVE AND AGAINST VALVE BODY
ON B.F. VALVES.
ATTACH WIRE TO CENTER OF PIPE
AT MIN. 6' INTERVALS AND AT
BENDS WITH DUCT TAPE
MARKED WITH RAISED
LETTERS ('WATER' OR
'IRR', AS APPROPRIATE),
SEE SPECIFICATIONS
TRACING WIRE SPLICE KIT,
SEE SPECIFICATIONS
6"
MIN.6"
MIN.
12"
18"
24"
36"
6" MIN.
24"
VARIES
NOTES:
1.BUTTERFLY VALVES SHALL BE ORIENTED SUCH THAT THE OPERATING NUT AND VALVE BOX SHALL BE NEAR THE CENTERLINE.
2.SEE DWG. NO. W-20 FOR BEDDING.
IRR
2.5" COMMERCIAL HMA
4" MIN. CONCRETE
6" MIN.
CLASS 3000 CONCRETE COLLAR WITH
LIGHT BROOM FIINISH
6" MIN.
CITY OF PASCO - STANDARD DETAIL CAST IRON VALVE BOX W-4
R: 09/06/2019Page 169 of 187
FINISHED GRADESEE DWG. NO. W-4 FORVALVE BOX ADJUSTMENTS2" THREADED CAP(FINGER TIGHT)SEE DWG. NO. W-4 FORVALVE BOX ADJUSTMENTSSTD. PIPE THREADSCONCRETE THRUST BLOCKPER DWG. NO. W-8CAP WITH 2" I.P.THREADED TAPUNDISTURBED EARTHPIPE BEDDINGSADDLE THRUST BLOCKSEE DWG. NO. W-9VALVE BOX WITH COVERPER SPECIFICATIONS2" DIA. GALV. STEEL PIPE (APWA 72-2.06)42" MIN.COVER10' MIN.2"WATER MAIN ORIRRIGATION LINE1' MIN.NOTES:1. ON WATER MAINS WHICH WILL BE EXTENDED IN THE FUTURE, THE VALVE WHICH OPERATES THE BLOW-OFF ASSEMBLY SHALL BE THE SAME SIZE AS THE MAIN UNLESS OTHERWISE APPROVED BY THE ENGINEER.2. THE THRUST BLOCK SHALL BE SIZED TO PROVIDE THRUST FOR THE MAIN WATER LINE.3. JOINT RESTRAINTS AND FIELD LOK GASKETS MAY BE REQUIRED IN PLACE OF A SADDLE THRUST BLOCK OR MAY BE USED WITH PERMISSION OF THE CITY ENGINEER.WATER MAIN VALVE1" HEX NUTWELDEDTO CAPFINISHED GRADESEE DWG. NO. W-4 FORVALVE BOX ADJUSTMENTS2" THREADED CAP(FINGER TIGHT)SEE DWG. NO. W-4 FORVALVE BOX ADJUSTMENTSSTD. PIPE THREADSCONCRETE THRUST BLOCKPER DWG. NO. W-8CAP WITH 2" I.P.THREADED TAPUNDISTURBED EARTHPIPE BEDDINGSADDLE THRUST BLOCK SEEDWG. NO. W-92" GATE VALVE WITH 2' SQUAREOPERATING NUT(COUNTERCLOCKWISE OPENING)VALVE BOX WITH COVERPER SPECIFICATIONS2" DIA. GALV. STEELPIPE (APWA 72-2.06)5'-0"42" MIN.COVER10' MIN.2"WATER MAIN ORIRRIGATION LINE1" HEX NUTWELDEDTO PIPE1" HEX NUTWELDEDTO CAPCITY OF PASCO - STANDARD DETAILBLOW-OFF ASSEMBLYW-5R: 09/06/2019Page 170 of 187
WATER OR IRRIGATION MAIN
NOTES:
1.VAULTS TO BE UTILITY VAULT 444-LA (3.5'x3.5'x3.25') AND 332P LID (DIAMOND PLATE SPRING ASSISTED COVER WITH LOCKING LATCH), OR APPROVED EQUAL.
DEPTH TO BE DETERMINED BY APPLICATION.
2.SEE SPECIFICATIONS FOR APPROVED AIR/VACUUM RELIEF.
MIN. SLOPE 2%1 - 90° 2" ELBOW
2" TAPPING SADDLE
2" GATE VALVE WITH
VALVE BOX AND LID
2" AIR/VACUUM
RELEASE VALVE
GROUT
THREADED
2" ELBOWS
UNION90° ELBOW
24-MESH
2" BEEHIVE STRAINER
2" 180° BEND
GUARD POST PER DWG. NO. W-12
GROUT
2" GALV. PIPE AND FITTINGS,
LENGTH VARIES
INSTALL ON 4" COMPACTED BASE ROCK
GRAVEL BACKFILL FOR DRAINS
PER SECTION 9-03.12(4)
ENVELOPED IN FILTER FABRIC
VARIES
6"
24" MIN.
24" MIN.
24" MIN
GRAVEL BACKFILL FOR DRYWELLS,
WSDOT SECTION 9-03.12(5)
24" MIN.
2" GALVANIZED IRON
TRACER WIRECITY OF PASCO - STANDARD DETAILAIR/VACUUM RELIEF AND VAULTW-6R: 09/06/2019Page 171 of 187
SIDE VIEW
PLAN VIEW
GATE VALVE
EX. WATER MAIN
GATE VALVE
FLANGE COUPLER
ADAPTERS
VAULT
EX. WATER MAIN
GATE VALVE
FLANGE COUPLER
ADAPTERS
GATE VALVE
METER (3", 4", 6", 8")
2' MIN. 3' MAX.
TO TOP OF VAULT
SEE NOTE 1
12" MIN.
SEE NOTE 1
18" MIN.
24" MIN.
12" MIN.
NOTES:
1.IF MAINLINE BRANCH VALVE IS MORE THAN 10' FROM THE VAULT, A SECOND GATE VALVE WILL BE REQUIRED.
2.VAULT REQUIREMENTS SHALL BE PER SPECIFICATIONS. SIZING SHALL BE THE RESPONSIBILITY OF THE DEVELOPER FOR
REVIEW/APPROVAL BY C.O.P. WATER DEPARTMENT.
3.METERS ARE TO BE SUPPLIED AND INSTALLED BY C.O.P. WATER DEPARTMENT CREWS AFTER ALL FEES ARE PAID.
24" - 36"3' MIN.
24" - 36"
CITY OF PASCO - STANDARD DETAIL 3" TO 8" WATER SERVICES W-7
R: 09/06/2019Page 172 of 187
VERTICAL THRUST BLOCKS
REBAR EMBEDMENT HOOK
SIZE DEPTH SIZE
# 4 11"6"
# 5 14"7.5"
# 6 17"9"
# 8 22"12"
SADDLE THRUST BLOCK
SEE DWG. NO. W-9
NOTES:
1.THRUST BLOCKING TO BE STRUCTURAL CONCRETE PER SPECIFICATIONS. MAX. SLUMP OF 4".
2.THE TABULATIONS ARE BASED UPON A MAXIMUM WATER PRESSURE OF 150 PSI AND A SAFE BEARING CAPACITY OF 2,000
LBS. PER SQ. FOOT ADJUST FOR OTHER VALUES OF PRESSURE.
3.KEEP CONCRETE CLEAR OF JOINTS AND ACCESSORIES.
4.ALL THRUST BLOCKS MUST BE FORMED WITH PLYWOOD OR OSB AND INSPECTED. BY C.O.P. WATER DEPARTMENT.
5.JOINTS TO BE WRAPPED POLYETHYLENE 3 MIL.
6.MECHANICALLY RESTRAINED PIPE AND FITTINGS MAY BE USED IN LIEU OF THRUST BLOCKING, SEE SPECIAL PROVISIONS
7-09.3(21).
CITY OF PASCO - STANDARD DETAIL CONCRETE THRUST BLOCKING W-8
R: 09/06/2019Page 173 of 187
A(FT)B(FT)C(IN)
6" & UNDER 2 1 1.5 8
8"2 1 1.5 8
10"2 1.5 1.5 12
12"4 1.5 1.5 12
16"4 2 1.5 16
18"4 2.5 2 20
20"6 3 2 24
24"8 3.5 2 24
TOP VIEW
SIDE VIEW
B
C
2
4
6
9
15
19
24
34
FUTURE WATERLINE
END CAP3/4" SHACKLE RODS,
GALVANIZED
FUTURE WATERLINE
END CAP
ROD "L"
SEE NOTE 1
3/8" REBAR
UNDISTURBED EARTH,
TRENCH WIDTH VARIES
REBAR CAGE
PIPE
DIAMETER
SHACKLE
RODS
REQUIRED
BEARING
AREA(SF)
DIMENSIONS
MINIMUM BEARING AREA OF THRUST BLOCK IN SQ. FEET
(BASED ON 2,000 P.S.F. SOIL BEARING CAP)
A A
A
A
SECTION A - A
10'
NOTES:
1.THE LENGTH OF RODS "L" SHALL BE 10 FEET MINIMUM OR AS
DIRECTED BY THE CITY ENGINEER.
2.CONCRETE SHALL BE PER THE SPECIFICATIONS.
3.RESTRAINED JOINTS (MEGA-LUG AND/OR FIELD LOC GASKETS)
MAY BE USED OR SHALL BE REQUESTED TO BE USED AT THE
DIRECTION AND PERMISSION OF THE CITY ENGINEER.
B
B
B
CITY OF PASCO - STANDARD DETAIL SADDLE THRUST BLOCKING W-9
R: 09/06/2019Page 174 of 187
R/W LINENOTES:
1.HYDRANTS SHALL BE PER THE SPECIFICATIONS.
2.HUB & FLANGE CASTING. (SEE SPECIFICATIONS).
3.HYDRANTS SHALL BE HOODED UNTIL OPERATIONAL.
4.HYDRANTS SHALL FACE THE STREET UNLESS OTHERWISE APPROVED BY THE CITY ENGINEER.
5.TRACER WIRE FROM MAIN TO FIRE HYDRANT. (BLUE INSULATION)
6.USE OF HYDRANT EXTENSIONS MUST BE APPROVED IN WRITING BY THE CITY ENGINEER. NOT TO BE USED IN NEW INSTALLATIONS.
7.SEE GUARD POST REQUIREMENTS DWG. NO. W-12.
8.REMOVE CHAINS FROM CAPS. STORZ CABLE TO REMAIN.
HYDRANT - PAINTED OSHA
SAFETY YELLOW
5" STORZ ADAPTER WITH
CAP PER SPECIFICATIONS
COMPACTED BACK FILL
TO 95% (ASTM D698)
PLACE MINIMUM OF 2 C.F.
OF 2" MINUS DRAIN ROCK
FILTER FABRIC
SEPARATING DRAIN ROCK
AND NATIVE SOILS CONCRETE BASE BLOCK 12"x12"x4"
WEEP HOLE, DO
NOT COVER WITH
CONCRETE BASE
6" PIPE, ROMAC GRIP
RINGS AT ALL JOINTS
6" GATE VALVE MJxFL
BOLT TO TEE OR
TAPPING SLEEVE
WATER MAIN
THRUST BLOCK PER DWG. NO. W-8
VARIABLE
SEE NOTE 2
VALVE BOX EXTENSION
SEE DWG. NO. W-4TYPICAL CURB
AND GUTTER
VALVE BOX PER
DWG. NO. W-4
TYPICAL SIDEWALK
SEE NOTE 5
12"
HYDRANT PLACEMENT
WITHIN CITY R/W OR
WITHIN UTILITY
EASEMENT
24"
MAX.
3' - 6" MIN.
3-6" DIAMETER AROUND
HYDRANT MUST BE LEVEL
EXCAVATION LIMITS
2"-8" ABOVE ADJACENT
GROUND ELEVATION
ROMAC GRIP RING
MJ ACCESSORY KIT
ROMAC GRIP RING
MJ ACCESSORY KITCITY OF PASCO - STANDARD DETAILFIRE HYDRANT INSTALLATIONW-10R: 09/06/2019Page 175 of 187
WATER PIPE
FIRE RISER
R/W LINESIDEWALK
BUILDING
FIRE SPRINKLER SYSTEM LINE
DOUBLE CHECK
DETECTOR
ASSEMBLY
WATER MAIN
VALVE
POST INDICATOR
VALVE (P.I.V.)
OPTIONAL LOCATION
FOR P.I.V
NOTE:
1.PASCO MUNICIPAL CODE 13.28.010 REQUIRES ALL FIRE LINES TO BE METERED.
2.GATE VALVE NOT REQUIRED IF VAULT IS WITHIN 10' OF VALVE AT MAIN.
3.FOR REFERENCE ONLY. SEE WASHINGTON STATE HEALTH DEPARTMENT REQUIREMENTS FOR FURTHER BACKFLOW CLARIFICATION.
4.THESE BACKFLOW PREVENTION ASSEMBLY INSTALLATION STANDARDS REFLECT MINIMUM REQUIREMENTS TO COMPLY WITH WASHINGTON DEPARTMENT OF HEALTH
REGULATIONS (WAC 246-290-490) AND UNIFORM PLUMBING CODE. UNAPPROVED DEVIATION MAY RESULT IN THE CITY REJECTING THE INSTALLATION AND THE CERTIFICATE
OF OCCUPANCY AS WELL. ALL REQUESTS FOR DEVIATION TO THESE STANDARDS MUST BE SUBMITTED IN WRITING AND APPROVED BY THE CITY'S CROSS-CONECTION
SPECIALIST.
5.DETECTOR METER TO READ IN CUBIC FEET.
6.IF A REDUCED PRESSURE DETECTOR ASSEMBLY (RPDA) IS REQUIRED, IT SHALL BE INSTALLED PER DWG. W-18.
7.PROPERTY OWNER IS RESPONSIBLE FOR FREEZE PROTECTION.
GATE VALVE,
SEE NOTE 2CITY OF PASCO - STANDARD DETAILFIRE LINES / BACKFLOWW-11R: 09/06/2019Page 176 of 187
FINISH GRADE
NOTES:
1.CENTER OF GUARD POST TO BE SET 3' - 6" FROM HYDRANT CENTER NUT.
2.GUARD POSTS OUTSIDE OF THE RIGHT-OF-WAY ARE NOT REQUIRED IF THE FACE OF A MINIMUM SIX-INCH
HIGH CURB IS LOCATED A MINIMUM OF 3' - 0" HORIZONTALLY FROM THE HYDRANT CENTER NUT.
3.DO NOT INSTALL GUARD POST IN LINE WITH HYDRANT PORTS.
4.CONCRETE SHALL BE PER SPECIFICATIONS.
5.GUARD POSTS SHALL BE PLUMB.
6.GUARD POSTS SHALL BE PAINTED OSHA YELLOW.
TYPICAL GUARD POST REQUIREMENTS. OTHER CONFIGURATIONS MAY BE
REQUIRED BY THE CITY ENGINEER, SUBJECT TO FIELD CONDITIONS.
45°
FILLED WITH CLASS 3000 CEMENT CONCRETE
6" DIA. x 6' LONG. SCH. 40 STEEL
BUILDING3'
5'
3'-6"
4'
MIN.
5'
5'5'
3
'
-
6
"
MIN. 18" DIA. CONCRETE FOOTING
STEEL CAP
CITY OF PASCO - STANDARD DETAIL GUARD POST W-12
R: 09/06/2019Page 177 of 187
WATER METER
PVC PIPE
PVBA/SVBA
TO HOUSETO
SYSTEM
GROUND
GROUND
DETAIL A
SCALE: NTS
DETAIL B
SCALE: NTS
FLOW PROPERTY LINESEE DETAIL A
GALVANIZED PIPE
(REQUIRED)
SEE DETAIL B
SYSTEM BLOWDOWN
FOR WINTERIZING
R.S. VALVE, SEE SPECIFICATIONS
4" MIN12" MIM60" MAX'NOTES:
1.PRESSURE VACUUM BREAKER ASSEMBLY (PVBA) MAY BE INSTALLED ON LOW HAZARD POTABLE WATER SUPPLY SYSTEMS AS DETERMINED BY THE CITY OF PASCO CROSS
CONNECTION SPECIALIST.
2.PVBA/SVBA MUST BE INSTALLED NOT LESS THAN 12" ABOVE THE HIGHEST POINT OF USE & NOT MORE THAN 60" HIGH.
3.OWNER IS RESPONSIBLE FOR FREEZE PROTECTION.
4.THE BACKFLOW ASSEMBLY IS TO BE TESTED AT THE TIME OF INSTALLATION BY A CERTIFIED TESTER APPROVED BY THE CITY UNLESS PRE-APPROVED BY THE CROSS
CONNECTION SPECIALIST.
5.THE IRRIGATION SUPPLY TEE AND VALVE IS TO BE NO LESS THAN 36" OUTSIDE OF THE METER BOX ON 3/4" AND 1" SERVICES, AND SHALL BE LOCATED INSIDE PROPERTY LINE.
6.THESE BACKFLOW PREVENTION ASSEMBLY INSTALLATION STANDARDS REFLECT MINIMUM REQUIREMENTS TO COMPLY WITH WASHINGTON DEPARTMENT OF HEALTH
REGULATIONS (WAC 246-290-490) AND UNIFORM PLUMBING CODE. UNAPPROVED DEVIATION MAY RESULT IN THE CITY REJECTING THE INSTALLATION AND THE CERTIFICATE
OF OCCUPANCY AS WELL. ALL REQUESTS FOR DEVIATION TO THESE STANDARDS MUST BE SUBMITTED IN WRITING AND APPROVED BY THE CITY'S CROSS-CONNECTION
SPECIALIST.
7.TEE IS TO BE LEAD FREE.
1/2" THREADED PIPE WITH CAP OR
PLUG. NO QUICK COUPLING
PERMITTED.
GALVANIZED PIPE REQUIRED FOR
INSTALLATIONS ABOVE GROUND
CURB STOP, BALL VALVE. NO GATE
VALVE 2" OR SMALLER OR STOP
AND WASTE VALVES PERMITTED.
UNION
PRIVATESTREET
CITY OF PASCO - STANDARD DETAILPVBA/SVBA INSTALLATION1/2" TO 2"W-13R: 09/06/2019Page 178 of 187
DCVA INSTALLATION
DOUBLE CHECK VALVE ASSEMBLY FOR ASSEMBLIES 1/2" TO 2"
FLOW FLOW
CENTER BACKFLOW
ASSEMBLY IN BOX
VALVE BOX, SEE
SPECIFICATIONS
8" MIN6" MIN12" MAXSEE NOTE 1 & 2
UNION
FILL CENTER AREA WITH MIN. 4" DEEP
OF 1" MINUS DRAIN FIELD ROCK.
FOR SUPPLY VALVE
AND BLOW OUT
ASSEMBLY SEE DWG.
NO. W-13, DETAIL B
BASE OF BOX
NOTES:
1.MUST BE ON THE LATEST USCFCCHR LIST OF APPROVED BACKFLOW PREVENTION ASSEMBLIES.
2.MUST BE INSTALLED IN THE ORIENTATION AS APPROVED BY THE USC TESTING LAB & ACCEPTED BY THE DEPARTMENT OF HEALTH.
3.ASSEMBLY INSTALLATIONS ABOVE GROUND REQUIRE COPPER OR GALVANIZED PIPE WITH AT LEAST ONE UNION. INSTALLATIONS
BELOW GROUND MUST HAVE TWO UNIONS.
4.FREEZE PROTECTION IS THE RESPONSIBILITY OF THE OWNER.
5.ASSEMBLIES APPROVED FOR BELOW GROUND INSTALLATION CANNOT BE SUBJECT TO FLOODING.
6.A LADDER IS REQUIRED IF ACCESS OPENING TO FLOOR EXCEEDS 36 INCHES.
7.THE BACKFLOW ASSEMBLY IS TO BE TESTED AT THE TIME OF INSTALLATION BY A CERTIFIED TESTER APPROVED BY THE CITY UNLESS
PRE-APPROVED BY THE CROSS CONNECTION SPECIALIST.
8.THESE BACKFLOW PREVENTION ASSEMBLY INSTALLATION STANDARDS REFLECT MINIMUM REQUIREMENTS TO COMPLY WITH
WASHINGTON DEPARTMENT OF HEALTH REGULATIONS (WAC 246-290-490) AND UNIFORM PLUMBING CODE. UNAPPROVED
DEVIATION MAY RESULT IN THE CITY REJECTING THE INSTALLATION AND THE CERTIFICATE OF OCCUPANCY AS WELL. ALL REQUESTS
FOR DEVIATION TO THESE STANDARDS MUST BE SUBMITTED IN WRITING AND APPROVED BY THE CITY'S CROSS-CONNECTION SPECIALIST.42" MIN24"-36"
VALVE BOX
CL
CITY OF PASCO - STANDARD DETAIL DCVA INSTALLATION 1/2" TO 2"W-14
R: 09/06/2019Page 179 of 187
DCVA & DCDA DUAL INSTALLATION LARGER THAN 2"
FOR DOUBLE CHECK VALVE ASSEMBLY & DOUBLE CHECK DETECTOR
ASSEMBLY LARGER THAN 2"
SEE SPECIFICATIONS FOR VAULT
AND VAULT LID REQUIREMENTS
GATE VALVE,
SEE NOTE 8
FLG.CPL. ADAPTER
SUPPORTS REQUIRED FOR
ASSEMBLIES LARGER THAN 2"
LADDER REQUIRED IF
DISTANCE FROM FLOOR TO
COVER EXCEEDS 36"
MIN. 3" DIA. FLOOR DRAIN WITH
1'' ROUND GRAVEL SUMP
FABRIC LINED TO PREVENT
SEDIMENT INFILTRATION
GROUT SPACE AROUND
PIPE (SEE SPECIFICATIONS)
INSTALL ON 4" COMPACTED
BASE ROCK42"MIN.24"24"12"VALVE MUST BE
RESTRAINED
24"
12"12"
24"
24"
NOTES:
1.MUST BE ON THE LATEST USCFCCHR LIST OF APPROVED BACKFLOW PREVENTION ASSEMBLIES.
2.MUST BE INSTALLED IN THE ORIENTATION AS APPROVED BY USC TESTING LAB AND ACCEPTED BY DEPT OF HEALTH.
3.FREEZE PROTECTION IS THE RESPONSIBILITY OF THE OWNER.
4.ASSEMBLIES APPROVED FOR BELOW GROUND INSTALLATION CAN NOT BE SUBJECT TO FLOODING.
5.THE BACKFLOW ASSEMBLY IS TO BE TESTED AT THE TIME OF INSTALLATION BY A CERTIFIED TESTER APPROVED BY THE CITY UNLESS
PRE-APPROVED BY THE CROSS CONNECTION SPECIALIST.
6.ALL VAULT WALL PENETRATIONS ARE TO BE GROUTED INSIDE AND OUT.
7.IF MAIN VALVE IS LOCATED WITHIN 10' OF THE VAULT, THIS VALVE IS NOT REQUIRED.
8.THESE BACKFLOW PREVENTION ASSEMBLY INSTALLATION STANDARDS REFLECT MINIMUM REQUIREMENTS TO COMPLY WITH
WASHINGTON DEPARTMENT OF HEALTH REGULATIONS (WAC 246-290-490) AND UNIFORM PLUMBING CODE. UNAPPROVED DEVIATION
MAY RESULT IN THE CITY REJECTING THE INSTALLATION AND THE CERTIFICATE OF OCCUPANCY AS WELL. ALL REQUESTS FOR
DEVIATION TO THESE STANDARDS MUST BE SUBMITTED IN WRITING AND APPROVED BY THE CITY'S CROSS-CONNECTION SPECIALIST.
24"-36"MIN. 36"
TO METER
CITY OF PASCO - STANDARD DETAIL DCVA & DCDA DUAL INSTALLATION
LARGER THAN 2"W-15
R: 09/06/2019Page 180 of 187
LARGER THAN 2"
FOR DOUBLE CHECK DETECTOR ASSEMBLY & DOUBLE CHECK VALVE ASSEMBLY
DCDA & DCVA INSTALLATION LARGER THAN 2"
24"
6"18" MINLADDER REQUIRED IF
DISTANCE FROM FLOOR TO
COVER EXCEEDS 36"
GROUT SPACE AROUND
PIPE (SEE SPECIFICATIONS)
SET ON 4" OF BASE ROCK
24"24"
FLG. CPL. ADAPTER
SUPPORTS REQUIRED FOR
ASSEMBLIES LARGER THAN 2"
MIN. 3" DIA. FLOOR DRAIN, WITH
1'' ROUND GRAVEL SUMP,
FABRIC LINED TO PREVENT
SEDIMENT INFILTRATION
SEE SPECIFICATIONS FOR VAULT
AND VAULT LID REQUIREMENTS
42"MIN.12"MINNOTES:
1.MUST BE ON THE LATEST USCFCCHR LIST OF APPROVED BACKFLOW PREVENTION ASSEMBLIES.
2.MUST BE INSTALLED IN THE ORIENTATION AS APPROVED BY USC TESTING LAB AND ACCEPTED BY DEPT OF HEALTH. DETECTOR
MUST READ IN CUBIC FEET.
3.FREEZE PROTECTION IS THE RESPONSIBILITY OF THE OWNER.
4.ASSEMBLIES APPROVED FOR BELOW GROUND INSTALLATION CAN NOT BE SUBJECT TO FLOODING.
5.THE BACKFLOW ASSEMBLY IS TO BE TESTED AT THE TIME OF INSTALLATION BY A CERTIFIED TESTER APPROVED BY THE CITY
UNLESS PRE-APPROVED BY THE CROSS CONNECTION SPECIALIST.
6.ALL VAULT WALL PENETRATIONS ARE TO BE GROUTED INSIDE AND OUT.
7.THESE BACKFLOW PREVENTION ASSEMBLY INSTALLATION STANDARDS REFLECT MINIMUM REQUIREMENTS TO COMPLY WITH
WASHINGTON DEPARTMENT OF HEALTH REGULATIONS (WAC 246-290-490) AND UNIFORM PLUMBING CODE. UNAPPROVED
DEVIATION MAY RESULT IN THE CITY REJECTING THE INSTALLATION AND THE CERTIFICATE OF OCCUPANCY AS WELL. ALL
REQUESTS FOR DEVIATION TO THESE STANDARDS MUST BE SUBMITTED IN WRITING AND APPROVED BY THE CITY'S
CROSS-CONNECTION SPECIALIST.
24"-36"
CITY OF PASCO - STANDARD DETAIL DCDA & DCVA INSTALLATION
LARGER THAN 2"W-16
R: 09/06/2019Page 181 of 187
RPBA INSTALLATION
FOR ASSEMBLIES 3/4" TO 2"
FOR REDUCED PRESSURE BACKFLOW ASSEMBLY
FLOW FLOW
CENTER ASSEMBLY IN ENCLOSURE
SLOPE FLOOR TO
DRAIN
METER
36" MIN.
BOX
METER
BOX
36" MIN.
SEE NOTE 1
6" MIN.OPTIONAL ENCLOSURE
SEE SPECIFICATIONS
12" MIN.OR ABOVEFLOOD PLAIN,WHICHEVERIS GREATER12" MIN.SEE NOTE 4
MINIMUM OF ONE
UNION REQUIRED
SEE SPECIFICATIONS FOR
BOX WHEN FREEZE
PROTECTION IS REQUIRED
4'' DRAIN TO DAYLIGHT
WITH BIRD SCREEN
CENTER BOX ON MIN. 12'' WIDE
BY 3 1/2'' THICK CONCRETE
FOOTING (6" WIDE BY 3 1/2"
THICK CONCRETE FOOTING
WITH DRAIN ROCK OPTION)
CONCRETE PAD MAY BE SUBSTITUTED
WITH MIN. 4" DEEP OF 1" DRAIN ROCK,
WITH PRIOR APPROVAL FROM THE CITY.
SLEEVE
(OPTIONAL)
42" MIN.
BASE OF ENCLOSURE
NOTES:
1. MUST BE ON THE LATEST USCFCCHR LIST OF APPROVED BACKFLOW PREVENTION ASSEMBLIES.
2. MUST BE INSTALLED ABOVE GROUND, MINIMUM 12" CLEARANCE ABOVE THE FLOOD PLAIN AND IN THE ORIENTATION AS APPROVED
BY USC TESTING LAB AND ACCEPTED BY DEPT OF HEALTH. THE ENCLOSURE MUST ALLOW FOR ROUTINE MAINTENANCE AND TESTING
(REMOVABLE ENCLOSURE OR OPENS ON THE SIDE FOR ACCESS TO TEST COCKS).
3. ASSEMBLY INSTALLATIONS ABOVE GROUND REQUIRE COPPER OR GALVANIZED PIPE WITH AT LEAST ONE UNION. OPTIONAL PVC SLEEVE
TO EXTEND
6" ABOVE AND 12" BELOW CONCRETE PAD TO ALLOW FOR SETTLEMENT OF PAD.
4. FREEZE PROTECTION IS THE RESPONSIBILITY OF THE OWNER.
5. THE BACKFLOW ASSEMBLY IS TO BE TESTED AT THE TIME OF INSTALLATION BY A CERTIFIED TESTER APPROVED BY THE CITY UNLESS
RE-APPROVED BY THE CROSS CONNECTION SPECIALIST.
6. FOR PREMISES ISOLATION, THE ENCLOSURE MUST HAVE A MINIMUM 3 1/2" CONCRETE PAD.
7. THESE BACKFLOW PREVENTION ASSEMBLY INSTALLATION STANDARDS REFLECT MINIMUM REQUIREMENTS TO COMPLY WITH
WASHINGTON DEPARTMENT OF HEALTH REGULATIONS (WAC 246-290-490) AND UNIFORM PLUMBING CODE. UNAPPROVED DEVIATION MAY
RESULT IN THE CITY REJECTING THE INSTALLATION AND THE CERTIFICATE OF OCCUPANCY AS WELL. ALL REQUESTS FOR DEVIATION TO
THESE STANDARDS MUST BE SUBMITTED IN WRITING AND APPROVED BY THE CITY'S CROSS-CONNECTION SPECIALIST.
6"
PVC VALVE BOX
PVC VALVE BOX
24"-36"
ISOLATION VALVE
CITY OF PASCO - STANDARD DETAIL RPBA INSTALLATION 3/4" TO 2"W-17
R: 09/06/2019Page 182 of 187
DRAIN
TO
FLOOR
SLOPE
FOR REDUCED PRESSURE DETECTOR ASSEMBLY & REDUCE PRESSURE
BACKFLOW ASSEMBLY LARGER THAN 2"
RPDA & RPBA INSTALLATION
FLOW FLOWMETER
36" MIN
BOX
METER
BOX
36" MIN
OPTIONAL ENCLOSURE,
SEE SPECIFICATIONS
12" MIN.SEE SPECIFICATIONS FOR
BOX WHEN FREEZE
PROTECTION IS REQUIRED
4'' DRAIN TO DAYLIGHT
WITH BIRD SCREEN
SLEEVE
(OPTIONAL)
BASE OF ENCLOSURE
SEE NOTE 1
GALV. PIPE
(OPTIONAL)
SEE NOTE 6
CENTER BOX ON 7 1/2"
THICK CONCRETE PAD
REINFORCED WITH
TWO #4 REBAR
12" MIN.
12" MIN OR ABOVE
FLOOD PLAIN,
WHICHEVER IS
GREATER
42" MIN
12" MIN.
NOTES:
1. MUST BE ON THE LATEST USCFCCHR LIST OF APPROVED BACKFLOW PREVENTION ASSEMBLIES.
2. MUST BE INSTALLED ABOVE GROUND, MINIMUM 12'' CLEARANCE ABOVE THE FLOOD PLAIN AND IN THE ORIENTATION AS
APPROVED BY USC TESTING LAB AND ACCEPTED BY DEPT. OF HEALTH. THE ENCLOSURE MUST ALLOW FOR ROUTINE MAINTENANCE
AND TESTING (REMOVABLE ENCLOSURE OR OPENS ON THE SIDE FOR ACCESS TO THE TEST COCKS).
3. OPTIONAL PVC SLEEVE TO EXTEND 6" ABOVE AND 12" BELOW CONCRETE PAD TO ALLOW FOR SETTLEMENT OF PAD.
4. FREEZE PROTECTION IS THE RESPONSIBILITY OF THE OWNER.
5. PIPE SUPPORTS ARE REQUIRED ON ASSEMBLIES OVER 2".
6. THE BACKFLOW ASSEMBLY IS TO BE TESTED AT THE TIME OF INSTALLATION BY A CERTIFIED TESTER APPROVED BY THE CITY UNLESS
PRE-APPROVED BY THE CROSS CONNECTION SPECIALIST.
7. THESE BACKFLOW PREVENTION ASSEMBLY INSTALLATION STANDARDS REFLECT MINIMUM REQUIREMENTS TO COMPLY WITH
WASHINGTON DEPARTMENT OF HEALTH REGULATIONS (WAC 246-290-490) AND UNIFORM PLUMBING CODE. UNAPPROVED DEVIATION
MAY RESULT IN THE CITY REJECTING THE INSTALLATION AND THE CERTIFICATE OF OCCUPANCY AS WELL. ALL REQUESTS FOR
DEVIATION TO THESE STANDARDS MUST BE SUBMITTED IN WRITING AND APPROVED BY THE CITY'S CROSS-CONNECTION SPECIALIST.
24" MIN.
12" MIN.
24"-36"
24"-36"
CITY OF PASCO - STANDARD DETAIL RPDA & RPBA INSTALLATION
LARGER THAN 2"W-18
R: 09/06/2019Page 183 of 187
24'' MIN.
RPDA & RPBA DUAL INSTALLATION
BACKFLOW ASSEMBLY LARGER THAN 2"
FOR REDUCE PRESSURE DETECTOR ASSEMBLY & REDUCED PRESSURE
FLOWFLOW
METER
BOX
SEE NOTE 1
SEE SPECIFICATIONS FOR
VAULT AND VAULT LIDS
SLEEVE
(OPTIONAL)
SEE NOTE 6
CONCRETE FLOOR
MUST SLOPE
TOWARDS DRAIN
DAYLIGHT DRAIN
12"
CENTER BOX ON 7 1/2" THICK
CONCRETE WITH 2-#4 REBAR
12" MIN 12" MIN
NOTES:
1.MUST BE ON THE LATEST USCFCCHR LIST OF APPROVED BACKFLOW PREVENTION ASSEMBLIES.
2.MUST BE INSTALLED ABOVE GROUND, MINIMUM 12'' CLEARANCE ABOVE THE FLOOD PLAIN (CURB) AND IN THE ORIENTATION AS
APPROVED BY USC TESTING LAB AND ACCEPTED BY DEPT. OF HEALTH. THE ENCLOSURE MUST ALLOW FOR ROUTINE MAINTENANCE AND
TESTING (REMOVABLE ENCLOSURE OR OPENS ON THE SIDE FOR ACCESS TO THE TEST COCKS).
3.OPTIONAL PVC SLEEVE TO EXTEND 6" ABOVE AND 12" BELOW CEMENT PAD TO ALLOW FOR SETTLEMENT.
4.FREEZE PROTECTION IS THE RESPONSIBILITY OF THE OWNER.
5.THE BACKFLOW ASSEMBLY IS TO BE TESTED AT THE TIME OF INSTALLATION BY A CERTIFIED TESTER APPROVED BY THE CITY UNLESS
PRE-APPROVED BY THE CROSS CONNECTION SPECIALIST.
6.THESE BACKFLOW PREVENTION ASSEMBLY INSTALLATION STANDARDS REFLECT MINIMUM REQUIREMENTS TO COMPLY WITH
WASHINGTON DEPARTMENT OF HEALTH REGULATIONS (WAC 246-290-490) AND UNIFORM PLUMBING CODE. UNAPPROVED DEVIATION MAY
RESULT IN THE CITY REJECTING THE INSTALLATION AND THE CERTIFICATE OF OCCUPANCY AS WELL. ALL REQUESTS FOR DEVIATION TO
THESE STANDARDS MUST BE SUBMITTED IN WRITING AND APPROVED BY THE CITY'S CROSS-CONNECTION SPECIALIST.
7.CITY OF PASCO ENGINEERING TO REVIEW NEED FOR VAULT.
4" MIN. DAYLIGHT DRAIN
42" MIN.
36" MIN 12" MIN ORABOVEFLOOD PLAIN,WHICHEVERIS GREATER24"-36"
CITY OF PASCO - STANDARD DETAIL RPDA & RPBA DUAL INSTALLATION
LARGER THAN 2"W-19
R: 09/06/2019Page 184 of 187
WATER SERVICE
6"
WATER MAIN
SEE DWG. NO. ST-3
FOR TRENCH SURFACING REPAIR
DETECTABLE
MARKING TAPE
TRENCH WALL
TRACER WIRE
PIPE ZONE BEDDING PER
SPECIFICATIONS, OR AS
APPROVED BY CITY ENGINEER
WATER MAIN
TRENCH BACKFILL MATERIAL MUST
BE COMPACTED TO 95% OR MIN.
(ASTM D698)
2'
TACK AROUND
EXISTING PAVEMENT
PIPE BEDDING ALL AROUND MUST BE
COMPACTED TO 95% MIN. (ASTM 698)
CORPORATION STOP
NOTES:
1.THIS STANDARD IS ACCEPTABLE FOR DEPTHS UP TO 14 FEET. PIPES THAT EXCEED 14 FEET SHALL CONFORM TO MANUFACTURER'S RECOMMENDATIONS FOR BEDDING.
2.TRENCH SHALL BE EXCAVATED TO ACCOMMODATE PIPE BELL.
6"
DUCTILE IRON TAP
PVC TAP
PIPE
ZONE
6"
TRENCH BEDDING MATERIAL MUST
BE COMPACTED TO 95% OR MIN.
(ASTM D698)CITY OF PASCO - STANDARD DETAILTYPICAL WATERTRENCH SECTIONW-20R: 09/06/2019Page 185 of 187
NOTES:
1.NO CONNECTION BETWEEN THE DRINKING SUPPLY WATER AND IRRIGATION SUPPLY IS ALLOWED.
2.NO PRIVATE FITTINGS OR VALVES ARE ALLOWED IN THE CITY IRRIGATION SUPPLY BOX.
3.ALL THREADED CONNECTIONS MUST USE THREAD SEALANT PER SPECIFICATIONS.
4.ALL FITTINGS PER SPECIFICATIONS.
1" BRASS GATE VALVE SPIGOT
1" BRASS ANGLE METER VALVE
W/PADLOCK WING & GASKET
1" CTS PURPLE POLY 200PSI
IRRIGATION MAIN
1" CAST IRON PIPE TAPPING SADDLE
W/DOUBLE STAINLESS BAND6"-10"1" BRASS CTSxMIP
QUICK JOINT W/INSERT STIFFENER
IRRIGATION SERVICE BOX
PER SPECIFICATIONS
1" x 2" BRASS NIPPLE
INSERT STIFFENER
STREET SIDE
IRRIGATION SERVICE
FROM IRRIGATION MAIN ONLY
IRRIGATION SERVICE FROM POTABLE WATER MAIN
MUST BE CONNECTED PER DWG. NO. W-2
PURPLE TRACER WIRE
18" GALVANIZED U-CHANNEL POST WITH
STAINLESS STEEL HOSE CLAMPS TO SUPPORT
POLY PIPE, EXTEND WITHIN 2" OF NIPPLE
CITY OF PASCO - STANDARD DETAIL IRRIGATION SERVICE
(FRONT YARD)W-21
R: 09/06/2019Page 186 of 187
TO IRRIGATION
SYSTEM
IRRIGATION BOX,
LID TO BE MARKED
"IRRIGATION"
2" GATE
VALVE
2" GALV. (TYP.)
4" x 2" REDUCERIRRIGATION MAIN
TAPPING SADDLE
4" R.S. TAPPING
GATE VALVE
TRACER WIRE
(PURPLE INSULATION)
VALVE BOX,
SEE DWG. NO. W-4
12"
PURPLE TRACER WIRE
CITY OF PASCO - STANDARD DETAIL CITY OWNED OR ACQUIRED
IRRIGATION SERVICES W-22
R: 09/06/2019Page 187 of 187