Hells Canyon Dam: Mid-Snake River at mile marker 247.0, completed in 1967, spillway 330 feet, 3 gates, concrete gravity type hydroelectric dam. Idaho PUD owned. Hells Canyon Dam employs a salmon protection program that works in conjunction with Brownlee Dam to release water to help spawning salmon get downstream.
Oxbow Dam: Mid-Snake River at mile marker 273.0,completed in 1961, spillway 700 feet, 3 gates, owned by Idaho Power Company, hydroelectric gravity concrete dam.
Brownlee Dam: Mid-Snake River at mile marker 285.0, completed in 1958, spillway 1097 feet, 4 gates, creates a 58 mile reservoir, concrete gravity type hydroelectric, PUD-owned by Idaho Power. Brownlee Dam works in conjunction with the Hells Canyon Dam to release water to help anadromous fish in their migration.
Dworshak Dam: Clearwater River at mile marker 1.9, North Fork, Idaho, completed in 1971, federally owned, concrete hydroelectric gravity dam. Dworshak creates a 53-mile long reservoir with a flood control plan that covers a 2 million acre region. The Corps of Engineers constructed the Dworshak National Fish Hatchery to compensate for loss of salmon migration because of the dam.
