Visited on 10/2/2017 on my way up Highway 108 to give an examination for work over at Owens Valley Conservation Camp. This Lake is located northeast of Sonora, CA in the small community of Twain Harte, California. This cute little lake is actually a reservoir created by Twain Harte Dam and it is a multiple arch dam. Developers began building Twain Harte Dam in the summer of 1927. It was completed in 1928 and is a private gated lake owned by the Twain Harte Lake Association. The dam is 36 feet high, 325 feet in length, and 8 feet in width. The dam has a crest elevation of 3,510 feet and its surface acreage is only 12 acres. In August 2014, fracturing of a granite dome known as "the Rock" located adjacent to the dam forced the closing and draining of the lake for safety reasons. It was feared the dam would fail and there would be a flash flood in Sullivan Creek. The cause of this fracturing is a process known as exfoliation.
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