The Trinity Dam is an earthfill dam on the Trinity River. The dam was completed in the early 1960s as part of the federal Central Valley Project to provide irrigation water to the arid San Joaquin Valley. Standing 538 ft (164 m) high, Trinity Dam forms Trinity Lake, California's third largest reservoir, with a capacity of more than 2,400,000 acre-feet (3,000,000 dam3). The dam includes a hydroelectric plant, and also provides flood control to the Trinity and Klamath river basins.[1]
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Trinity Dam is featured in the documentary.
In 40 years after people, in the United States alone, only 10 of the 15 tallest dams are concrete and the others are made of compacted rock or earth like Trinity Dam in Northern California. If humans were around, a leak in the dam would get an emergency fix but these days are long gone. Gordon Masterton stated that some of the earth dams are enormous and if it fail in time, then the surge of water that falls in behind it to cascades down a valley below would have a huge force, which is big enough to sweep away everything on its path.
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