Lower Granite Lock and Dam

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.

Contact Us

Lower Granite Lock and Dam
885 Almota Ferry Road
Pomeroy, WA 99347-9758
Phone: 509-843-1493

Lower Granite Natural Resources
Management Office

100 Fair Street
Clarkston,  WA  99403
Phone: 509-751-0240

Lower Granite Visitor Center
Phone:  509-843-2214