Lower Granite Lock and Dam was authorized by the River and Harbor Act of 1945. The project includes a dam, a navigation lock, powerhouse, a fish ladder and associated facilities. It provides hydropower, navigation, flood risk management, fish and wildlife habitat, recreation and incidental irrigation. The dam, located on the Snake River, is about 3,200 feet long with an effective height of 100 feet. It is a concrete gravity type, with an earthfill right abutment embankment.

Recreation areas along the project’s reservoir offer a variety of recreation opportunities such as fishing, swimming, picnicking, boating, hunting, hiking and camping.

America the Beautiful National Parks & Federal Recreational Lands Passes

These interagency passes cover entrance fees and standard amenity (day-use) fees. Expanded amenity fees such as camping, tours, and special permits are not covered; however Senior and Access Pass holders may receive a discount. Check with the location you plan to visit to learn more about their fees and pass acceptance. To order a pass, go to USGS or Recreation.gov.

Passes are accepted at federal recreational lands managed by six agencies: U.S. Army Corps of Engineers, U.S. Fish and Wildlife Service, U.S. Forest Service, Bureau of Reclamation, and the National Park Service.