@mattblaze the water from Hetch Hetchy is some of the cleanest and purest on the planet. Snowmelt held by granite. Few places have water that good (Granada, Spain is one). And the dam provides hydropower that serves a significant amount of the City of San Francisco's needs. It comes at a significant environmental cost, of course. As so many things do. On balance, was it the right thing to do? That's hard to answer, even in retrospect.

@mattblaze In 1988, Donald Hodel (Secretary of the Interior under Reagan) floated the idea of tearing down O’Shaughnessy dam, which inundated the Hetch Hetchy valley. At the time I thought it was an elaborate troll to split environmental groups away from local San Francisco interests, but apparently he was serious.sfgate.com/opinion/openforum/a

@mattblaze please tell me that hetchy hetch was the turn of the century equivalent of boaty mcboatface.

@mattblaze I, for one, like the Water Temple.sfpuc.gov/learning/come-visit/