DATE: November 19, 2025
TO: Honorable Mayor and City Councilmembers
FROM: Water Utilities Department
TITLE: AWARD OF CONTRACT TO PALM ENGINEERING CONSTRUCTION COMPANY, INC. FOR THE MISSION SIPHON RELIEF PROJECT
RECOMMENDATION
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Staff recommends that the City Council award a public works agreement to Palm Engineering Construction Company, Inc., in the amount of $773,190, for the construction of the Mission Siphon Relief Project, authorize the City Engineer to approve change orders up to 10 percent of the project cost or $77,319; and authorize the City Manager to execute the agreement upon receipt of all supporting documents.
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BACKGROUND AND ANALYSIS
The Mission Siphon Relief Project (Project) will reduce the risk of a sanitary sewer overflow to the San Luis Rey River associated with the existing siphon pipe and its northern tributary sewer. The siphon is located at 1306 Buena Street, on the east side of Interstate 5. Siphons require regular cleaning to avoid clogging based on the nature of their design. In addition, the tributary sewer does not meet current minimum size standards.
The Project would divert wastewater away from the existing siphon by constructing a new sewer on Brooks Street, which would connect to the existing trunk sewer in 1st Street. The northern tributary sewer to the siphon will also be upsized, providing additional storage capacity and improving system reliability. During design, it was identified that the existing sewer along Brooks Street between Mission Ave and Seagaze Drive had experienced settlement at the downstream manhole, creating a potential for pipe failure and hydraulic in efficiencies.
In 2018, the City utilized its on-call design contract with West Coast Civil to design the tributary sewer upsizing and replacement of the settling sewer segment along Brooks Street. Upon completion of the design, City staff worked with West Coast Civil to prepare contract documents for the Mission Siphon Relief Project. The Pr...
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