16. Winzler & Kelly Bollinger bridge
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PUBUC WORKS DEPARTMENT
CUPERTINO
Summary
AGENDA ITEM
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AGENDA DATE October 2. 2007
SUBJECT AND ISSUE
Adoption of Resolution No. 07-1]l: Authorizing the Director of Public Works to approve an .
amendment of the design contract with Winzler. & Kelly for the reconstruction of the bridge on
Bollinger Road over Calabazas Creek in the amount of $50,000.00, for a total contract amount
of $509,226.12. '
BACKGROUND
On January 16,2001, the City Council authorized the execution of an agreement with the Santa
Clara Valley Water District (SCVWD) for the reconstruction of the bridge on Bollinger Road
over Calabazas Creek in order to increase the hydraulic capacity of the Calabazas Creek
L channel at the bridge and to widen Bollinger Road for bicycle lanes.
The original agreement provides for the design and construction of extensive improvements to
the existing bridge that will both enlarge the cross-sectional area of the box culvert to increase
its capacity and lengthen the culvert to accommodate the widening of Bollinger Road. The
original agreement calls for the City to ::Idmlnlster the project design ~ntCact and for SCVWD
to advertise, award and administer the construction contract.
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On May 3~ 2005, the agreement was amended to reflect changes in the scope of the project.
Those changes included (a) altering the limits and extent of work in the Calabazas Creek
channel in order to better protect and enIiance the riparian habitat upstream of the bridge; (b)
modifying the work in the chaDnel to coordinate the project with a long-term flood risk
management plan for the reach of Calabazas Creek between Miller Avenue and Wardell
Avenue; (c) including a structur~ upgrade of the bridge necessary for widening the bridge; and
(d) shifting the project ma'1.1agement responsibilities from the City to SCVWD.
On April 4, 2006, the agreement was again amended because, construction of the project had
been delayed by requirements of the environmental approval process, by SCVWD's obligations
to its own project approval process, and by SCVWD's requireri1ent that extensive redesign and
physical modeling of the bridge's complex storm water flow characteristies be undertaken.
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The amendment called for SCVWD to pay for the added costs of the extensive hydraulic
redesign and modeling The project design contract with Winzler and Kelly was increased to
reflect tho,se added costs of $89,325.12 paid by the District, to bring the contract total to
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$459,225.12. The amendment to the agreement also extended the term of the original
agreement, which at that time was on the point of expiring.
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After bids were opened on April18t 2007 t a construction contract for the project was awarded
on May 8t 2007, to the low bidder ACC West. Construction of the project, which to be
undertaken over two Ye8rst commenced on June 18t 2007t and will proceed to Ocrober of this
year. It will recommence in April 2008 and is expected to reach ~ Completion in September
2008.
Although the original scope of the design con~t with Winzler and Kelly included
construction engineering taskst the extra hours spent on project design by Wmzler and Kelly
staff due to design changes and considerable extension of the design phase make it necessary to
increase the contract amount by $50tOOO.00 in order to complete the construction engineering
tasks.
FISCAL IMPACT
Earlier this yeart Council appropriated $250tOOO.00 in Fiscal Year 2007-08 and $25,000.00 in
. Fiscal Year' 2008*09 for this project in Account No. 270-9443 in the adopted Capital
Improvements Program. There are' sufficient funds in this account to cover the recommended
increase of $50tOOO.00 in the Winzler and Kelly design contract At project completion, the
City will be responsible for roughly 21% of the total costs of the project up to the maximmn
approved by Council, and the District will be responsible for roughly 79% of the total project
costs. . '
STAFF RECOMMENDATION
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Staff recommends that the City Council adopt Resolution No. 07- nt: Authorizing the Director
of Public Works to approve an amendment of the design contract with Wmz1er & Kelly for the
reconstruction of the bridge on Bollinger Road over Calabazas Creek in the amount of
$50,000.00, for a total contract amount of $509,226.12. '
Submitted by:
'r:t/~l d tAu U s(f'
Ralph A. Quallst Jr.
Director of Public Works
Approved for submission:
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David W. Knapp II r "
City Manager '
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DRAFT
RESOLUTION NO. 07-171
A RESOLUTION OF THE CTIY COUNCIL OF THECITY OF CUPERTINO
AUTHORIZING THE DIRECTOR OF PUBLIC WORKS TO APPROVE AN AMENDMENT
OF 1HE DESIGN CONTRACT WITH WINZLER & KELLY FOR RECONSTRUCTION OF
THE BRIDGE ON BOLLINGER ROAD OVER CALABZAS CREEK IN THE AMOUNT OF
$50,000.00, FOR A TOTAL CONTRACT AMOUNT OF $509,226.12.
WHEREAS, the project to has been significantly delayed by an extensive redesign and
physical modeling of the bridge's complex stonn water flow characteristics; and
WHEREAS, extra hours spent on project design by Winzler and Kelly staff due to design
changes and considerable extension of the design phase for the Reconstruction of the Bridge on
Bollinger Road over Calabazas Creek project make it necessary to increase the design contract
amount by $50,000.00 in order to complete the construction engineering tasks covered by the
contract.
NOW, THEREFORE, BE IT RESOLVED that the City Council of the City of Cupertino
hereby authorizes tl,e Director of Public Works to approve an amendment of the design contract,
with Winzler & Kelly for the reconstruction of the bridge on Bollinger Road over Calabazas Creek
in the amount of $50,000.00, for a total contract amount of $509,Z26.12, and take all necessary
associated actions, including allocation and expenditure of funds, on behalf of the City of
Cuperlino. '
, PASSED AND ADOPTED at a regular meeting of the City Council of the City of
Cupertino this 2nd day of October 2007, by the following vote:
Vote Members of the City Council
AYES:
NOES:
ABSENT:
ABSTAIN:
ArrEST:
APPROVED:
City Clerk
Mayor, City of Cupertino
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