Yosemite and Tioga Pass Area

San Francisco’s Hetch Hetchy water system, completed in 1934, is a 167-mile, gravity-driven network of dams, reservoirs, tunnels, pump stations, aqueducts and pipelines that collects Tuolumne River runoff on federal land near the Yosemite Valley and transports it to the San Francisco Bay Area. This view of a pump station in Poopenaut Valley can be seen from Cherry Lake Road on the way to Hetch Hetchy.