Granite Hydroelectric Power Plant Historic District

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 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 (41 cm) Pelton wheel driving a belt, an unusual feature.

Water is supplied through a steel conduit and penstock system with a 450-foot (140 m) head from the Stairs Station upstream.