SAN FRANCICO (KCBS)— San Francisco city officials say you won't notice a thing when they start mixing groundwater into the pristine Hetch Hetchy water supply. The plan is to try and boost ...

Mountain Tunnel, a key part of the Hetch Hetchy water system ... on the three major Bay Area fault lines whose failure could shut off the water supply, such as the Calaveras Dam near Fremont ...

The gate controls water flow to the three major lines pumping water from the Hetch Hetchy reservoir in the Sierra Nevada to the Bay Area 160 miles away. The blockage has cut the water supply to the ...

But if we just need 1 foot — it seems like there’s plenty of backup supply, right ... points to the yellow and brown squiggly lines on the map, revealing our water’s path from Hetch Hetchy to the Bay ...

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The San Francisco Public Utilities Commission gave its mid-year water supply update Monday and announced that the Hetch Hetchy Regional Water System storage is at less than 65 percent capacity.

Any water that is stored in the Calaveras and San Antonio reservoirs must be treated separately from the direct Hetch Hetchy supply at the Sunol Valley Water Treatment Plant a few miles southwest ...

As to why the PUC is choosing to change the Hetch Hetchy water, they say it will conserve the water supply before the next drought.

this imperative has yet to be fully realized in the management of California's water supply. Conceived of in the 1890s and constructed in the 1920s, the Hetch Hetchy water system required the ...