HomeMy WebLinkAboutCC AG PKT 2005-12-12 #U
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AGENDA REPORT
DATE:
December 12, 2005
Honorable Mayor and City Council
John B. Bahorski, City Manager
TO:
THRU:
FROM:
Mark Vukojevic, P.E. Director of Public Works/City Engineer
SUBJECT:
APPROVAL OF PLANS AND SPECIFlCATIONS FOR
WEST END PUMP STATION REPLACEMENT
PROJECT No. 50050 (pHASE ONE)
SUMMARY OF REQUEST:
The proposed City Council action will approve the plans and specifications and authorize
Staff to initiate the bidding process for the West End Pump Station Replacement Project
No. 50050 (phase One).
BACKGROUND:
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The West End Pump Station was originally constructed in 1959 as a means to pump
storm water run-off from a l65-acre watershed covering portions of Marina Hill North,
Bridgeport and Old Town into the San Gabriel River. The station has two natural gas
engines driven propeller pumps each rated at 25,000 gallons per minute. The streets in
the adjacent Mobile Home Park drain directly into the wet well of the Pump Station.
Consequently, during heavy rains the Park is flooded whenever the water level in the wet
well exceeds the street elevation. Upgrades and improvements to the pump station have
not kept up with the growth of development in the City. Maintenance and operation of
the ,pump station have also suffered because replacement parts are difficult to obtain.
A fire at the Station during a storm in 2000 completely damaged one of the two natural
gas engines leaving the station only at half capacity. The burned engine was replaced by
an engine obtained from the County of Orange i\D.d reconditioned at the City's expense in
October 2001. Other minor improvements were also made to the station at that time.
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The West End Pump Station does not have capacity adequate for the current standards
and it lacks proper controls. In early 2001, the City retained AKM Consulting Engineers
to prepare a Preliminary Design Report (PDR) for construction of a new Pump Station to
replace the existing. The PDR evaluated the hydrology of the drainage site among other
things and found that the existing pumps do not have sufficient capacity to handle the
standard 25-year storm-flow criteria. Actually, according to the PDR, the existing pumps
can handle only 71 percent of 5-year storm flow. Therefore, the PDR recommended
replacement of the existing station with a brand new station.
Agenda Item [)
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Studies for the final design was split into two phases. The first phase, which is the current
proposed project, involved making various improvements to the structural elements of the
pump station, including the mechanical, building, piping, and underground concrete
work. The second phase will involve the design of the pump replacements.
Environmental studies were initiated in 2003 to evaluate whether the proposed project
could have significant effect on the environment. The results of the analysis were
finalized and approved by Council in June 14,2004.
The proposed project required expansion of the existing station. Negotiations with the
Oakwood Apartments property owners began in late 2004 to secure additional property
necessary for the expansion. Because the negotiations were not successful, eminent
domain procedures was initiated by Staff. In June and November of 2005 the City
Council approved the resolution to acquire the property.
Permits have been required from various outside agencies in order to construct this
project. Agencies such as the California Coastal Commission, the Department ofFish and
Game, and the Army Corps of Engineers were consulted by Staff and its consultant,
Culbertson Adams and Associates, to procure permits for approval. Staff was successful
with acquiring permits from all the agencies except with the Army Corps of Engineers.
However, submittals have been made and it is expected that permit approval should be
received by March 2006.
The plans and specifications have been completed for the first phase of the project. Upon
the successful bidding process and award of a contract, the project is expected to begin
construction in March 2006. Phase 2 will follow aft~ the phase 1 project.
FISCAL IMPACT:
Funds in the amount of $2,300,000' are available from the City's Capital Improvement
Program under the Redevelopment Agency fund. Expenses in the amount of $625,000
has been spent on environmental studies, design, and property acquisition. With the
increase in construction costs over the past few years, unanticipated property and permit
costs, a funding shortfall is expected for part of the project and this will be reviewed with
the receipt of the bids. This project has been approved within the City's 5-year Capital
Improvement Program budget under Project No. 50050.
RECOMMENDATION:
It is recommended that the City Council approve the plans and specifications and
authorize Staff to initiate the bidding process for the West End Pump Station
Replacement (phase one) Project No. 50050.
Agenda ltem_
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Prepared By:
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Associate Engineer
Concur:
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Ma1k K. Vukojevic, P.E.
Director of Public Works/City Engineer
Reviewed By:
Sean Crumby, P .E.
Deputy City Engineer
Agenda lrem_