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Title:
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Approval of Final Plans and Specifications and Authorization to Advertise Bids for the Braddock Pump Station Upgrade Project, P-873.
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City of Culver City, California
Agenda Item Report
Meeting Date: 02/01/2010 Item Number: C-1
CITY COUNCIL AGENDA ITEM: Approval of Final Plans and Specifications and
Authorization to Advertise Bids for the Braddock Pump Station Upgrade Project, P-
873
Contact Person/Dept.: Andy O’Connell/PW Phone Number: (310) 253-5606
Fiscal Impact: Yes [X] No [] General Fund: Yes [] No [X]
Public Hearing: [] Action Item: [] Attachments: []
Commission Action Required: Yes [] No [X] Date: _______________
Public Notification: (E-Mail) Agenda and Meetings – City Council (01/27/10)
Department Approval:
Charles D. Herbertson (01/22/10)
City Attorney Approval:
Carol Schwab (by H. Baker) (01/26/10)
Chief Financial Officer Approval:
Mark Scott (by M. Noller) (01/26/10)
City Manager Approval:
Mark Scott (01/27/10)
RECOMMENDATION:
Staff recommends that the City Council approve the final plans and specifications
and authorize advertising bids for the Braddock Pump Station Upgrade Project, P-
873.
BACKGROUND:
The Braddock Pump Station (Braddock Station) is located at the northeast corner of
the intersection of Braddock Drive and Sawtelle Boulevard. Sewer flows from a 720-
acre area of Culver City and abutting portions of the City of Los Angeles flow to the
Braddock Station and are pumped into a force main in Braddock Drive to the City of
Los Angeles’ West Los Angeles Interceptor sewer in Overland Avenue.
Approximately 1,500,000 gallons of sewage are pumped through the Braddock
Station on a daily basis. The Braddock Station’s last major upgrade was in 1986.
In recent years, operational problems have plagued the Braddock Station. Sediment
buildup often causes sporadic reductions in pump efficiency. The existing gravity
inflow pipe connects to the existing wet well at its bottom, and any rise in the wet
well level causes the upstream piping system to flow full creating a situation where it
is difficult to clean or inspect this system. In addition, there has been a frequent
problem with rags clogging pumps at this station. Due to these operational
problems, the SCADA alarm system is often triggered when sewage in the collection
well rises higher than pre-determined setpoints. The Public Works Department
Maintenance Operations Division staff is forced to pay close attention to the station
and is frequently called-out on overtime to tend to station maintenance.
City of Culver City, California
Agenda Item Report
DISCUSSION:
On May 11, 2009, the City Council approved a Professional Services Agreement
with PRP Engineering, Inc. to provide design services for the upgrade of the
Braddock Station. The design presented for the City Council’s approval addresses
all issues that were recommended in the study report prepared by PRP Engineering,
Inc. and APD Consultants, Inc. to identify the ongoing maintenance issues of this
sewer pump station. The design includes the following upgrades:
• Construction of a larger and deeper concrete wet well, while maintaining the
existing wet wells to provide additional capacity. The new wet well will
include a lower pre-rotation basin that will create a localized vortex, enabling
the floating sediments, grease balls, and rags to be efficiently pumped out of
the wet well.
• Installation of more powerful submersible pumps - These pumps are designed
to be more efficient for the removal of all sediments (including rags) from the
wet well, easier to remove and replace, and are variable speed for a more
energy efficiency design.
• Replacement and upgrade of the existing sewerage monitoring and alarm
systems.
• Replacement of the existing 24-year old emergency generator with a new
generator that will be self-testing, more reliable, and have a more efficient fuel
usage rating.
The plans and specifications are available at the Engineering Division public counter
for review.
Should the City Council approve the plans and specifications and authorize
advertisement for bids this evening, it is anticipated that the project will be presented
to the City Council for consideration of contract award in April 2010. Should a
construction contract be awarded, construction is slated to begin in June 2010 and
be completed by March 2011.
FISCAL ANALYSIS:
This project will be funded from the City’s Capital Improvement Project P-873
(Braddock Pump Station Upgrades - 20400873), which has an adopted budget of
$1,950,000.00. The engineer’s estimate that this budget was based on did not
include the replacement of the existing emergency generator nor the requirement
that the contractor employ security guards during night time and weekend hours. An
important component during construction will be the installation of a temporary City of Culver City, California
Agenda Item Report
sewerage by-pass system that must be deployed during most of the project’s
construction period. The piping for this by-pass system will be located on the
surface and be subject to potential vandalism, thus the need for on-site security.
The cost for these additional items is estimated to be $70,000 for the new generator
and $75,000 for the services of a security guard for the estimated ten month
construction period. Depending on the competitive bid results, a budget amendment
from the sewer enterprise fund reserve may be required at the time of contract
award.
MOTIONS:
That the City Council:
1. Approve the final plans and specifications for the Braddock Pump Station
Upgrade Project, P-873; and,
2. Authorize advertising for construction bids for the Braddock Pump Station
Upgrade Project, P-873.