Lower Granite Dam, Hydroelectric power station in Whitman County, United States.
Lower Granite Dam spans 975 meters across the Snake River, generating 810 megawatts of electricity through six operational turbines for regional power distribution.
The United States Army Corps of Engineers initiated construction in 1965, but funding delays resulted in project completion ten years later at a cost of 624 million dollars.
The dam's visitor center features educational displays, a theater, and observation areas where people learn about hydroelectric power generation and river navigation systems.
The navigation lock measures 86 feet wide and 674 feet long, enabling commercial vessels to traverse between Lewiston, Idaho, and Portland through a 374-mile waterway.
The facility incorporates specialized fish ladders and a juvenile collection system to protect salmon populations during their migration through the Snake River system.
Location: Whitman County
Location: Garfield County
Inception: 1965
Length: 975 m
GPS coordinates: 46.66050,-117.42830
Latest update: May 17, 2025 10:43
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