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After passing through the powerhouses, Hetch Hetchy water flows into the 167 mi (269 km) Hetch Hetchy Aqueduct which travels across the Central Valley. Just before reaching the Bay Area, it passes through the Irvington tunnel near the city of Fremont , and the aqueduct splits into four pipelines at 37°32′53″N 121°55′55″W / 37. ...
Moccasin generates 427 million KWh per year, and is fed by Hetch Hetchy water through the Mountain Tunnel, [5] which provides a maximum head of 1,300 feet (400 m). [4] Water diverted at O'Shaughnessy Dam feeds into the Hetch Hetchy Aqueduct, which provides 85 percent of the municipal water for 2.4 million people in the San Francisco Bay Area. [50]
Map of California's interconnected water system, including all eleven reservoirs over 1,000,000 acre-feet (1.2 km 3) as well as selected smaller ones.. This is a list of the largest reservoirs, or man-made lakes, in the U.S. state of California.
The current lake was formed in 1918 by damming Eleanor Creek as part of the Hetch Hetchy Reservoir system, [2] constructed to supply water and power to the city of San Francisco. The original smaller, natural lake was also named "Eleanor" [2] after the daughter of Josiah Whitney, leader of the California Geological Survey in the 1860s.
The San Francisco Public Utilities Commission (SFPUC), of which Hetch Hetchy Water and Power is a division, provided about 45% of the funds for construction of the 1971 New Don Pedro Dam and so has the right to store 570,000 acre-feet (700,000,000 m 3) of water in the reservoir.
The reservoir has a natural catchment area of 25.4 square miles (66 km 2); [2] however, most of its water is imported through the Hetch Hetchy Project pipelines. In order to protect the high-quality Hetch Hetchy water, local flows from Moccasin Creek are captured upstream and routed through a bypass system that discharges downstream of Moccasin ...
Download as PDF; Printable version; ... Hetch Hetchy Reservoir: O'Shaughnessy Dam: Tuolumne River: ... Lake Hemet Municipal Water District: 1895: Masonry (arch) 135: ...
The uppermost dam is the O'Shaughnessy, which impounds the 360,000-acre-foot (440,000,000 m 3) Hetch Hetchy Reservoir, providing water and power to the City of San Francisco. The Hetch Hetchy hydroelectric system diverts large volumes of water into tunnels that feed two hydroelectric plants, the Kirkwood and the Moccasin.