HomeMy WebLinkAboutBallard Marine - Change Orders 3 & 4 C7-WT-2R-14-06 Butterfield WTP Intake ScreensCITY OF PASCO
PUBLIC WORKS DEPARTMENT
CONTRACT CHANGE ORDER NO. 3
Project No: C7 -WT -2R-14-06 Project Title: Butterfield WTP Intake Screens
Contractor: Ballard Marine Construction
Description of Change: Furnish and Install New Airburst Strap
Detail as Appropriate: See Attached Memo
Contract Bid Amount:
$
669,955.00
SALES TAX @ 8.6%:
$
57,616.13
Total:
$
727,571.13
PREVIOUS CHANGE ORDER
CURRENT CHANGE ORDER
Subtotal $ 59,635.00
Subtotal $ 14,965.00
Sales tax @ 8.6% $ 5,128.61
Sales tax @ 8.6% $ 1,286.99
Total $ 64,763.61
Total $ 16,251.99
Total Change Orders To Date $ 81,015.60
New Contract Amount $ 808,586.73
IS CONTRACT TIME AFFECTED BY THIS CHANGE ORDER YES NO
Contract Time Prior to this Change Order ................................. 40/106
Modification to Contract time by this Change Order .................... 0
revised Total Contract Time .................................................... 40/106
It is mutually agreed by both parties that this Change Order fully describes the change(s) that is (are) being
made and that the compensation for this Change Order is full and complete and is the only compensation
due or owing for this Change Order. Further, it is mutually agreed that this document will supplement the
present Contract Documents and that the provisions of the previously executed Contract Documents shall
apply to this Change Order.
AGREED TO AND ACCEPTED: y 1 . APPROVED:
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CONTRACTOR Date PROJECT MANAGER to
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APPROVED:
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CONSTRUCTION MANAGER Date
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J PUBLIC WO e
DIRECTOR
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Memo
Public Works Department
Engineering Division
To: Kent McCue, Construction Manager
CC: Ryan Mahaffey, Construction Inspector
Brenda Timpany, Admin Assistant 1
From: Teresa Reed -Jennings, P.E., Senior Engineer 411
Date: August 27, 2015
Re: Change Order #3, Butterfield Water Treatment Plant Intake Screens
Change Order No. 3 reflects the revisions to the Butterfield Water Treatment Plant Intake Screens listed
below. This change order was requested by the City.
Subsequent to installation, unprecedented milfoil growth in the river repeatedly clogged the barrel screens,
severely limiting the intake capacity of the Butterfield WTP. Water Plant Operations staff programed the air -
burst system to activate at increasingly frequent intervals in an attempt to keep the screens clean; eventually
settling on a two hour operation cycle. After several months of round-the-clock air -burst system operation, the
barrel screen strap/concrete anchor connections failed. The continued operation of the air -burst system
before repairs could be effected, further damaged the existing connections, thereby rendering the original
straps and bolts unusable. Fortunately, the localized damage did not compromise the overall integrity of the
concrete anchors or their ability to anchor the barrel screens to the riverbed.
The design engineer, RI -12 Engineering, contacted the barrel screen manufacturer, Bilfinger Water
Technologies, Inc., regarding the upward thrust forces that would be generated by the air burst system in the
event the screens were completely plugged by milfoil. After consulting with Bilfinger, RI -12 designed new
strap/concrete anchor connections to resist the increased forces. The new straps were fabricated and
installed by Ballard Marine Construction over a three day period in July. Ongoing underwater inspections of
the barrel screens reveals no degradation of the new strap/concrete anchor connections.
The pre-tax cost associated with this change order is $14,965.00.
This emergency work was performed after Substantial Completion so there is no change to working days or
the contract completion date.
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CITY OF PASCO
PUBLIC WORKS DEPARTMENT
CONTRACT CHANGE ORDER NO.4
Project No: C7 -WT -2R-14-06 Project Title: Butterfield WTP Intake Screens
Contractor: Ballard Marine Construction
Description of Change: Quantity Reconciliation CO - Refer to Backup Sheet
Detail as Appropriate: Refer to Backup Sheet
Contract Bid Amount:
SALES TAX @ 8.6%:
Total:
$ 669,955.00
$ 57,616.13
$ 727,571.13
PREVIOUS CHANGE ORDER
CURRENT CHANGE ORDER
Subtotal $ 74,600.00
Subtotal $ 11,270.00
Sales tax @ 8.6% $ 6,415.60
Sales tax @ 8.6% $ 969.22
Total $ 81,015.60
Total $ 12,239.22
Total Change Orders To Date $ 93,254.82
New Contract Amount $ 820,825.95
IS CONTRACT TIME AFFECTED BY THIS CHANGE ORDER YES NO
Contract Time Prior to this Change Order ................................. 40/106
Modification to Contract time by this Change Order .................... 15
revised Total Contract Time .................................................... 40/121
It is mutually agreed by both parties that this Change Order fully describes the change(s) that is (are) being
made and that the compensation for this Change Order is full and complete and is the only compensation
due or owing for this Change Order. Further, it is mutually agreed that this document will supplement the
present Contract Documents and that the provisions of the previously executed Contract Documents shall
apply to this Change Order.
AGREED TO AND ACCEPTED:
J S
CONTRACTOR Date
APPROVED:
CONSTRUCTION MANAGER Date
APPROVED:
��teoa %) lIL>PC�`
PROJECT MANAGER Dat Q -2—
APPROVED:
i -
P RKS Dale
DIRECTOR
C) s -)3
Memo
Public Works Department
Engineering Division
To: Kent McCue, Construction Manager
CC: Ryan Mahaffey, Construction Inspector
Brenda Timpany, Admin Assistant 1
From: Teresa Reed -Jennings, P.E., Senior Engineer6&
Date: August 27, 2015 "�
Re: Change Order#4, Butterfield Water Treatment Plant Intake Screens
Change Order No. 4 reflects the revisions to the Butterfield Water Treatment Plant Intake Screens listed
below. This change order was requested by the City:
Reconcile various bid item quantities to reflect installed quantities (both added and deducted values).
The full amount allocated for Item No. 5 Force Account was not utilized during construction and resulted in a
deduct value.
The actual installed quantity of Item No. 12 Trough Backfill was 105 cubic yards. This is an overrun value of
the bid quantity of 60 cubic yards. The overrun was due in part to an error in the original bid quantity
calculations and also to the changed conditions of the actual riverbed adjacent to the end of the existing
concrete trough.
This change order adds 15 working days to the contract for a total of 121 Working Days. The additional
contract days extends the new completion date to June 23, 2015. The additional working days were verbally
agreed to when the concrete curing time for the floor repair took the entire 28 days to reach the required
strength of 4,000 pounds per square inch due to the cool, moist conditions of the intake structure. The
additional days had no effect on the in -water work window.
The pre-tax cost associated with this change order is $11,270.00.
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