In 1916, William L. Wales, engineer for the Honey Lake Valley Irrigation District, looked at non-traditional water supply sources to reclaim the desert lands of eastern Honey Lake Valley. After all, other sources of water had been claimed.

Wales examined Horse Lake and wrote: “Horse Lake and it’s watershed of 115.2 square miles, laying just east of Eagle Lake, offer very good opportunities for a portion of the water supply. This lake has an area of 3520 acres at an average depth of six feet. According to a statement of a man living near the lake, it has not been dry but twice in sixty years. A shallow cut has been dug through the east rim connecting with a creek leading into Pete’s Valley. No doubt more than enough water has flowed out through this cut to offset the deficiency of the dry years.”

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