City, State: North Bend, Washington
Hydro Plant Type: Run-of-River
Capacity: 23.88 MW
Head: 500 feet
# Turbines: 2
Equipment Type: Horizontal Francis Units
The Twin Falls Hydroelectric Project is entirely subterranean, with its powerhouse located approximately 325 feet below the ground. Other features of the project include a nearby recreational hiking/sightseeing trail, a small control structure with bio-degradable hydraulic oil systems and a fish by-pass.