HomeMy WebLinkAboutAgenda Report - August 19, 2015 C-08AGENDA ITEM C 42
&I% CITY OF LODI
COUNCIL COMMUNICATION
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AGENDA TITLE: Accept Improvements Under Contract for White Slough Water Pollution
Control Facility Farm Irrigation Improvements — Phase 1
MEETING DATE: August 19, 2015
PREPARED BY: Public Works Director
RECOMMENDED ACTION: Accept improvements under contract for White Slough
Water Pollution Control Facility Farm Irrigation
Improvements — Phase 1.
BACKGROUND INFORMATION: The project was awarded to Knife River Construction, of
Stockton, on March 18, 2015, in the amount of $415,213.
The contract has been completed in substantial
conformance with the plans and specifications approved by City Council.
As part of the summer operation at White Slough Water Pollution Control Facility (WSWPCF),
treated wastewater is pumped into a series of pipes and ditches to irrigate approximately 900
acres of farmland. There were multiple incidents in 2014 and 2015 when the concrete ditch
along Thornton Road overloaded with irrigation water and spilled into the County right-of-way.
As required, the overflow events were reported to the Central Valley Regional Water Quality
Control Board (CVRWQCB). The CVRWQCB issued a Notice of Violation requiring the City to
take action to eliminate future overflow events. The City was not fined for the events because
this project was already in the planning and design phases. Had this project not been
completed in a timely manner, future overflows would likely have resulted in significant fines.
In order to eliminate future spills, this project removed 3,770 feet of concrete ditch and replaced
them with 1,040 feet of 36 -inch pipe and 2,730 feet of 30 -inch pipe. These pipes were designed
to accommodate existing irrigation needs and future expansions.
During construction, the City requested that the contractor clean and patch the joints of another
concrete ditch on the property. This ditch had minor seepage through various joints along the
canal that had previously been patched by City staff. The seepage from this ditch was not a
violation being that it is completely onsite (and away from any public right-of-way), however the
nuisance water was beginning to cause erosion issues.
The contract completion date was June 26, 2015, and the actual completion date was July 17,
2015. The final contract price was $429,365. The difference between the contract and the final
price and completion dates was due to the cleaning and sealing of the joints of the separate
concrete ditch.
APPROVED: l ��
Stephen Schwab r City Manager
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Accept Improvements Under Contract for White Slough Water Pollution Control Facility Farm Irrigation Improvements — Phase 1
August 19, 2015
Page 2
Following acceptance by the City Council, as required by law, the City Engineer will file a Notice
of Completion with the County Recorder's office. The notice serves to notify vendors and
subcontractors that the project is complete and begins their 30 -day period to file a stop notice
requiring the City to withhold payments from the prime contractor in the event of a payment
dispute.
FISCAL IMPACT: This project will reduce potential discharge fines and will reduce
future expansion costs.
FUNDING AVAILABLE: This project was funded by Wastewater Capital
(53199000.77020).
F. Wally 5 dein
Public Works Director
Prepared by: Sean Nathan, Associate Civil Engineer
FWS/SN/tb
cc: Utilities Superintendent
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