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U.S. Army Corps of Engineers St. Paul District Public Affairs Office 332 Minnesota St., Suite E1500 St. Paul, MN 55101 Phone: (651) 290-5807 Fax: (651) 290-5752 cemvp-pa@usace.army.mil
On July 10, 2025, the U.S. Army Corps of Engineers, Walla Walla District, celebrated the 3,200-feet-long Lower Granite Lock and Dam’s 50 years of service to the Pacific Northwest along with the generations of people who made it possible. Lower Granite Lock and Dam, located on the Snake River in southeastern Washington, includes a dam, navigation lock, powerhouse, fish ladder, and associated facilities. The project provides hydropower, navigation, flood risk management, fish and wildlife habitat, recreation, and incidental irrigation. The dam spans approximately 3,200 feet and has an effective height of 100 feet. It is a concrete gravity structure with an earthfill right abutment embankment.
The U.S. Army Corps of Engineers will recognize National Hydropower Day Aug. 24. For more than 140 years, the USACE Hydropower Program has been providing the nation with resilient and reliable clean energy.
USACE is among the nation’s top 10 power producers and is the largest owner and operator of hydroelectric power plants, producing more than 25% of the nation’s hydropower. USACE operates and maintains 356 individual generating units at 75 multi-purpose power-producing projects across five USACE divisions and 16 districts.
These hydropower assets generate more than 70 billion kilowatt hours per year of reliable energy, enough to power 10 cities the size of Seattle. Additionally, the revenue generated by USACE hydropower is used to repay the original construction costs of the hydropower projects and to fund the operation, maintenance and modernization investments of the hydropower infrastructure.
Moving forward, USACE hydropower plants will remain indispensable assets to the nation and necessary parts of the ongoing national transition to a more resilient and reliable electric grid.
For more information on the USACE Hydropower Program, please visit https://www.usace.army.mil/Missions/Civil-Works/Hydropower/.
Release no. 25-012
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