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Proposals to remove underused dams and restore fish habitats emerged in the early 21st century with support from the state's Native American tribes; the first major dam removal was the Condit Dam near White Salmon in 2011, which was followed by two dams on the Elwha River near Port Angeles. As of 2024, 39 dams in Washington have been removed. [2]
Mossyrock Dam is a concrete arch-gravity dam on the Cowlitz River near Mossyrock in Lewis County, Washington, United States. The reservoir created by the dam is called Riffe Lake . The primary purpose of the dam is hydroelectric production while flood control is a secondary function. [ 1 ]
The Elwha Dam was a 108-ft (33 m) high dam located in the United States, in the state of Washington, on the Elwha River approximately 4.9 miles (7.9 km) upstream from the mouth of the river on the Strait of Juan de Fuca.
Gorge Dam is one of three along the upper Skagit River in Whatcom County, Washington, and part of the Skagit River Hydroelectric Project that supplies Seattle with some of its power needs. Construction on the original wooden Gorge Dam began in 1921, with its generators formally started by President Calvin Coolidge on September 17, 1924. [ 1 ]
It is named for Franklin D. Roosevelt, who was president during the construction of the dam. Covering 125 square miles (80,000 acres), it stretches about 150 miles (240 km) from the Canada–US border to Grand Coulee Dam, with over 600 miles (970 km) of shoreline; by surface area it is the largest lake and reservoir in Washington. [1]
Howard A. Hanson Dam USACE annotated aerial photo In January 2009, 15 inches (380 mm) of rainfall within 24 hours peaked water inflows behind the reservoir at 30,500 cubic feet per second (860 m 3 /s), raising the reservoir level to a record high of 1,189 feet (362 m) above sea level. [ 3 ]
Mud Mountain Dam is a dam in King County, Washington, a few miles southeast of Enumclaw.The dam impounds the White River and is used for flood control. [1]The dam was finished in 1948 by the United States Army Corps of Engineers, although the project had been authorized by an act of Congress in June 1936.
Little Goose Lock and Dam is a hydroelectric, concrete, run-of-the-river dam in the northwest United States, on the lower Snake River in southeast Washington. At the dam, the river is the border between Columbia and Whitman counties ; [ 2 ] it is nine miles (14 km) northeast of Starbuck and 25 miles (40 km) north of Dayton .