Lower Monumental Lock and Dam

Lower Monumental Lock and Dam was authorized by the River and Harbor Act of 1945. The project includes a dam, a powerhouse, navigation lock, two fish ladders, a juvenile fish facility (JFF), and associated facilities. It provides navigation, hydroelectric generation, recreation, and irrigation. The dam, located on the Snake River, is 3,791 feet long, with an effective height of about 100 feet. It is a concrete gravity-type dam, with earthfill abutment embankments.

Lake West, the project’s reservoir, offers a variety of recreation opportunities such as fishing, swimming, picnicking, boating, hunting, hiking and camping.

Contact Us

Lower Monumental Lock and Dam
5520 Devils Canyon Road
Kahlotus, WA 99335
Phone: 509-282-3219

Tri-Rivers Natural Resources
Management Office

2339 Monument Drive
Burbank, WA 99323
Phone: 509-547-2048