Emergency Firefighting Water System
The Emergency Firefighting Water System – officially called the Auxiliary Water Supply System (AWSS) – is an independent high-pressure water supply system dedicated to fire protection. It was built in 1913 in response to the 1906 Great Earthquake. It consists of a 135-mile pipeline network, a high-elevation reservoir and two large-capacity tanks, two pumping stations, fireboats, underground water tanks (cisterns) and Bay water intakes (suction connections).