The story of the building of the Hetch Hetchy system with its miles of underground aqueducts (including UNDER the SF Bay) is quite remarkable. It was done in response to the fires following the 06 earthquake in San Francisco to ensure San Francisco would always have water. From the Wikipedia page: After passing through the powerhouses, Hetch Hetchy water flows into the 167 mi (269 km) Hetch Hetchy Aqueduct which travels across the Central Valley. Upon reaching the Bay Area near the city of Fremont, the aqueduct splits into four pipelines. These are called Bay Division Pipelines (BDPL) 1, 2, 3, and 4, with nominal pipeline diameters of 60, 66, 78, and 96 inches (1.5, 1.7, 2.0 and 2.4 m, respectively).[55] All four pipelines cross the Hayward fault. Pipelines 1 and 2 cross the San Francisco Bay to the south of the Dumbarton Bridge, while pipelines 3 and 4 run to the south of the bay. In the Bay Area, Hetch Hetchy water is stored in local facilities including Calaveras Reservoir, Crystal Springs Reservoir, and San Antonio Reservoir.[56] Pipelines 3 and 4 end at the Pulgas Water Temple, a small park that contains classical architectural elements which celebrate the water delivery.[57] Water from Hetch Hetchy is some of the cleanest municipal water in the United States; San Francisco is one of six U.S. cities not required by law to filter its tap water...
Posted on: Wed, 29 Jan 2014 23:42:30 +0000
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