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Annual generation. 5,170 GWh [1] [2] McNary Dam is a 1.4-mile (2.2-km) long concrete gravity run-of-the-river dam which spans the Columbia River. It joins Umatilla County, Oregon with Benton County, Washington, 292 miles (470 km) upriver from the mouth of the Columbia. [3] It is operated by the U.S. Army Corps of Engineers ' McNary Lock and Dam ...
Including just the dams listed below, there are 60 dams in the watershed, with 14 on the Columbia, 20 on the Snake, seven on the Kootenay, seven on the Pend Oreille / Clark, two on the Flathead, eight on the Yakima, and two on the Owyhee. Averaging a major dam every 72 miles (116 km), the rivers in the Columbia watershed combine to generate ...
Upstream of the Hanford Reach is Priest Rapids Dam and downstream is the McNary Dam, which also impounds the last stretch of the Snake River, the largest tributary of the Columbia. The Hanford Reach includes the still extant Coyote Rapids and supports over forty species of fish including significant numbers of spawning fall chinook salmon
The Hanford Reach, the last inland, free-flowing stretch of the Columbia River, is downstream from Priest Rapids Dam and upstream from McNary Dam. Washington state Department of Fish and Wildlife ...
McNary National Wildlife Refuge is a wildlife preserve, one of the national wildlife refuges operated by the United States Fish and Wildlife Service. Extending along the east bank of the Columbia River in southeastern Washington, from the confluence of the Snake River to the mouth of the Walla Walla River, and downstream into Oregon, McNary NWR ...
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33,400 cu ft/s (950 m 3 /s) [3] The Walla Walla River is a tributary of the Columbia River, joining the Columbia just above Wallula Gap in southeastern Washington in the United States. The river flows through Umatilla County, Oregon, and Walla Walla County, Washington. [1] Its drainage basin is 1,758 square miles (4,550 km 2) in area.
Lake Umatilla. / 45.71750°N 120.69389°W / 45.71750; -120.69389. Lake Umatilla is a 110-mile (177 km) long [1] reservoir on the Columbia River in the United States, between the U.S. states of Washington and Oregon. It was created in 1971 with the construction of John Day Dam, and stretches upstream to the McNary Dam.