The project is a continuation of the District's on-going program to repair and replace elements of the
sanitary sewer collection system to extend the useful life of the system. The project is comprised of
replacing 16 manholes identified in the Wastewater Collection System Master Plan and by staff as a part
of routine maintenance.
Replacement of manholes is typically required due to: (1) the settlement of manholes which adversely
affect the connecting pipes and sewage flows; (2) the deterioration of the manhole due to the corrosive
gas produced by sewage; and/or (3) the scouring of receiving manholes at the end of a force main, due to
the velocity of wastewater pumped from the lift station via the force main pipeline.
These manholes operate as force main collectors, receiving wastewater flow from various lift stations and
require replacement. During the condition assessment performed as part of the Wastewater Master Plan,
Manholes 29-07, 18-01, 16-17, 14-02, 22-18, 22-19, 37-11, 29-31, 10-01, and 12-02 were witnessed to
operate under turbulent conditions during force main discharge cycles. Additionally, staff has identified six
(6) manholes located on trunk lines on East Hillsdale Boulevard, a major boulevard, and within busy
intersections, adding complexity to their inspection and replacement: 29-08, 29-09, 29-10, 29-11, 29-12,
and 29-13. Replacement of these manholes and the intercepting piping will enhance station reliability
and public safety.
Estimated Project Schedule:
Design: FY 2024-2025
Construction: FY 2025-2026 This project is included in the City of Foster City's Preliminary 2023-2024 Budget Document. As of October 4, 2023, information regarding a design team and a general contractor is not available. A timeline for design and construction has not been determined. *Project information has been obtained through a public capital improvement plan (CIP). A CIP is a financial schedule for short- and long-range projects which is updated regularly. Information listed in the CIP often evolves based on funding availability and the project details, including timeline and value, are subject to change. The content management team will continue to pursue additional details as they become available.
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