Logo design for Electron Hydro power on Mt. Rainier, Washington.
The project, which was completed in 1904, draws water from the Puyallup River, then funnels it to the Electron power plant via a 10-mile (16 km) span of wooden flume running along the side hills of the winding river valley while the river runs down a steep canyon. The wooden flume has a cross section of 8 by 8 feet (2.4 by 2.4 m) and can supply up to 400 cubic feet (11 m3) of water per second to the turbines of the Electron powerhouse.
A light railway line was built on top of the flume to shuttle maintenance workers and equipment. It is known as "the crookedest railway in the world," but it is not the only railway line with this claim.