Perched atop Twin Peaks, the Summit Reservoir is a 14 million gallon water hold that provides water for residents and the fire department. A seismic retrofitting was completed in June 2006.
The SFFD owns the reservoir.
Additional Info
Muni access:
N-Judah, K/T rail lines -- King and 2nd St (AT&T Park).
10-Townsend -- 2nd St. and Townsend; walk one block to King and turn north.
Seismic retrofitting info: http://sfwater.org/Project.cfm/MC_ID/35/MSC_ID/393/MTO_ID/649/PRJ_ID/125