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SFPUC presents AWSS upgrades; proposes West Side potable AWSS with pump stations at Sunset and Lake Merced
Summary
SFPUC staff outlined past AWSS work funded by EASER bonds and described a conceptual West Side potable AWSS using pump stations at Sunset Reservoir (North Basin, 90,000,000 gallons) and Lake Merced; they said the West Side project would meet fire department performance standards and provide seismic drinking‑water redundancy.
John Scarpulla, representing SFPUC engineering, updated the commission on the Auxiliary Water Supply System (AWSS), describing both completed reliability projects and planned work to extend high‑pressure, seismically resilient water service to the West Side.
Scarpulla said the AWSS — a high‑pressure fire suppression water system built after the 1906 earthquake — was transferred from the Fire Department to SFPUC in 2010. Since then staff completed a system condition assessment and began projects to improve water sources and infrastructure using earthquake safety and emergency response (EASER) bond funds. "In 2010, we received…
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