Add Third/Fourth Lagoon Pump and related Infrastructure & Lagoon Pump Station Building Rehab Study (CIP 301-717 and CIP 301-718)

​​​​​​​The City’s storm drainage system consists of a network of storm drainpipes that drain to the lagoon which is then manually pumped into the San Francisco Bay at the City’s Corporation Yard.

The Lagoon Pump Station at the City’s Corporation Yard houses four pump bays with two active pumps and two decommissioned pumps. CIP 717 provides for the removal of 2 non-functioning lagoon pump engines, impellers, shafts, and associated plumbing that were abandoned in place when the two current pumps were installed in 2001, so that a third and possibly fourth functioning lagoon pump may be installed. Studies have shown that from 1974 to 2019 storms have become more severe and frequent due to climate change effects. When a significant storm event is happening, there are short durations when both lagoon pumps have been in operation and the lagoon level continued to rise. This project will add a third and possibly fourth pump to the existing lagoon pump station which will provide the City with the redundancy to reduce the risk of flooding should a failure occur to either of the two existing pumps during a severe storm and high tide condition.

The Lagoon Pump Station was one of the first building constructed in Foster City in the 1960’s. In several locations, significant amounts of concrete have spalled away which adversely affects the structural integrity of certain elements of the facilities. In addition, numerous structural code changes have been adopted since the design of this building. CIP 718 will provide for further seismic analysis of the building and the areas of corrosion with recommendations to either rehabilitate or replace the entire building.