Hetch Hetchy Water & Power plans five-year $140M Mountain Tunnel project

The City and County of San Francisco and the San Francisco Public Utilities Commission are planning a five-year $140 million project beginning next year to repair, rehabilitate and upgrade the 19-mile-long Mountain Tunnel, a key component of the Hetch Hetchy Water System that takes water from Tuolumne County and sends it to San Francisco

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