<P> In the 21st century, the mill is usually called the Crystal Mill or the Old Crystal Mill . Many decades ago, when the mill was still in use, it was called the Sheep Mountain Power House at the Lost Horse Millsite, or simply the Lost Horse Mill . Sometimes it is erroneously called the Dead Horse Mill . </P> <P> The mill was constructed in 1893 by George C. Eaton and B.S. Phillips, promoters of the Sheep Mountain Tunnel and Mining Company . It was built as a power plant for the Sheep Mountain Tunnel . Originally it had a horizontal waterwheel which generated compressed air for miners in the nearby silver mines . It fell into disuse in 1917 when the Sheep Mountain Mine closed . The mill was placed on the National Register of Historic Places on July 5, 1985 . </P>

Crystal mill in the rocky mountains of colorado