Granite Hydroelectric Power Plant Historic District

The Granite Hydroelectric Power Station was built in 1896-1897 at the mouth of Big Cottonwood Canyon, about 6 miles southeast of Salt Lake City, Utah, United States(in what is now eastern Cottonwood Heights. The plant comprises the powerhouse, transformer house, a wooden conduit, penstocks, and a small dam. Like the Stairs Station upstream, it represents an intact high-head generating plant from the late 19th century.
The powerhouse is a rectangular brick building on a concrete foundation, with extensive corbeling. The interior is a single room with two Pelton wheels flanking a generator, which replaced two older turbine-generator units. A work area in the station was powered by a 16 inches Pelton wheel driving a belt, an unusual feature. The ceiling is a peaked assembly of steel beams with an arched brick infill. Water is supplied through a steel conduit and penstock system with a 450-foot head from the Stairs Station upstream. The dam, built in 1945, is part of neither historic district.

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