US Army Corps of Engineers
Walla Walla District

Walla Walla District Locks and Dams

Projects

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Located in Ahsahka, Idaho, this congressionally authorized project includes Dworshak Dam, Dworshak Reservoir lands, powerhouse, recreation facilities, wildlife mitigation and Dworshak National Fish Hatchery.

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The Mill Creek project consists of the Mill Creek Channel, Bennington Lake and associated federal lands. The dam and reservoir portions of the channel and lands are operated and maintained by the Corps. The project provides for flood risk management, recreation, wildlife habitat and irrigation.

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This congressionally authorized project consists of Lower Granite Dam, navigation lock, powerhouse, a fish ladder and associated facilities. The project provides hydroelectric generation, navigation, recreation and incidental irrigation.

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This congressionally authorized project includes Lower Monumental Dam, powerhouse, navigation lock, two fish ladders, a juvenile fish facility (JFF), and appurtenant facilities providing for navigation, hydroelectric generation, recreation, and irrigation.

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The Little Goose project includes a dam, navigation lock, power plant, fish ladder and appurtenant facilities. It provides navigation, hydroelectric power generation, recreation and incidental irrigation.

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This congressionally authorized project consists of Ice Harbor Dam, powerhouse, navigation lock, two fish ladders, a removable spillway weir and a juvenile fish bypass facility. It provides navigation, hydroelectric generation, recreation and incidental irrigation.

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The McNary project includes McNary Dam, Lake Wallula, powerhouse, navigation lock, two fish ladders and a system of levees and pumping plants. The project provides for slackwater navigation, hydroelectric power generation, recreation, wildlife habitat and incidental irrigation.

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The Lucky Peak project includes the dam, Lucky Peak Lake, federally owned lands managed by the Corps, and operational and recreational facilities. The project provides flood control, fish and wildlife habitat, irrigation and recreation. Since 1961, more than $2.37 billion in potential flood damages have been prevented.

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Contact Us

Dworshak Dam and Reservoir
Phone: 208-476-1255

Mill Creek and Bennington Lake
Phone: 509-527-7160

Lower Granite Lock and Dam
Phone: 509-843-1493

Lower Monumental Lock and Dam
Phone: 509-282-3219

Little Goose Lock and Dam
Phone: 509-399-2233

Ice Harbor Lock and Dam
Phone: 509-547-7781

McNary Lock and Dam
Phone: 541-922-2268

Lucky Peak Dam and Lake
Phone: 208-343-0671