Dam
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McNary: Columbia River, OR/WA
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 at Astoria, Oregon.
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Mayfield: Cowlitz River, WA
Located 65 miles south of Tacoma, Washington, Mayfield Dam is part of the two-dam Cowlitz Hydroelectric Project. Construction began in 1955 and power generation began in 1963.
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Lower Monumental: Snake River, WA
Lower Monumental Lock and Dam is a hydroelectric, concrete, run-of-the-river dam on the Snake River, and bridges Franklin County and Walla Walla County, in the state of Washington.[3] The dam is located six miles (10 km) south of the town of Kahlotus, and 43 miles (69 km) north of the town of Walla Walla.
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Lower Granite: Snake River, WA
Lower Granite Lock and Dam is a concrete gravity run-of-the-river dam on the Snake River, and bridges Whitman County and Garfield County, in the U.S. state of Washington.[4] The dam is located 22 miles (35 km) south of the town of Colfax, and 35 miles (56 km) north of Pomeroy.
