City of San Rafael
San Quentin Pump Station Replacement and Outfall Rehabilitation

Alpha CM is providing construction management and inspection services for the $6M City of San Rafael’s San Quentin Stormwater Pump Station Replacement Project. The new station must be fully operational prior to demolition of the existing aging facility. Construction requires a cofferdam and dewatering as the intake facilities are in a tidal wetland. Three new 100 CFS submersible pumps will be installed at full build-out. The project includes new screenings facilities, SCADA, motor control center, portable generator connector, and extensive coordination with PG&E for new electrical transformer and facilities. The project also includes the rehabilitation of the 60-inch RCP Outfall that has numerous sags. Repair methods will be determined after the contractor has CCTV’d the pipe. The work is in the vicinity of the salt marsh harvest mouse habitat and full-time biological monitoring is required. The engineer’s estimate for the project was at $3.3 million dollars, but the contractor’s low bid was $6.6 million. Alpha CM worked with the City and the contractor to develop value engineering proposals that resulted in savings of over $500,000.