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This huge, century-old tunnel holds the key to S.F.’s Hetch Hetchy water supply
As the controversial Hetch Hetchy Reservoir got built 100 years ago, so did an enormous 19-mile water tunnel that’s now undergoing urgent repairs.
https://www.sfchronicle.com/climate/article/hetch-hetchy-water-tunnel-17878821.php
cover tunnel photo by: Matt Brown from London, England / CC BY
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https://www.sfchronicle.com/climate/article/hetch-hetchy-water-tunnel-17878821.php
This huge, century-old tunnel holds the key to S.F.’s Hetch Hetchy water supply
www.sfchronicle.comAs the Hetch Hetchy Reservoir got built 100 years ago to supply water to San Francisco, so did a 19-mile water tunnel that’s now undergoing urgent repairs.