Lake Roosevelt

Lake Roosevelt. It is the expansive reservoir created by the Grand Coulee Dam on the Columbia River in the U.S. state of Washington. The lake, a central feature of the Columbia River Basin project, extends about 151 miles to the Canada–United States border, inundating former river valleys and towns. It serves critical roles in hydroelectric power generation, irrigation, flood control, and provides a major venue for recreation in the Pacific Northwest.

History

The creation of the reservoir was a direct result of the construction of Grand Coulee Dam, one of the key projects of the New Deal-era Public Works Administration. Authorized under the River and Harbor Act of 1925 and later championed by agencies like the United States Bureau of Reclamation, the dam's completion in 1942 initiated the filling of the lake, which was named for President Franklin D. Roosevelt. The impoundment submerged significant historical sites, including the former town of Kettle Falls, a vital Salish and Spokane fishing ground for millennia, and disrupted the traditional lifeways of Colville tribes. The reservoir also played a role in the Manhattan Project, as its hydroelectricity powered the Hanford Site plutonium production reactors.

Geography and Hydrology

The reservoir stretches from the concrete face of Grand Coulee Dam northward to the Canada–United States border near the city of Northport. Its primary inflows are the Columbia River and the Spokane River, with the Sanpoil River and other smaller tributaries also contributing. The lake's shoreline, over 660 miles long, borders parts of the Colville National Forest and the Spokane Indian Reservation. The underlying topography includes dramatic features like the Grand Coulee itself, and the reservoir's waters fill several canyons, creating a varied landscape of steep cliffs and more gradual shorelines. The lake level fluctuates significantly based on power generation and irrigation demands from the Columbia Basin Project.

Recreation and Tourism

Managed as part of the Lake Roosevelt National Recreation Area by the National Park Service in cooperation with the Colville Confederated Tribes, the reservoir is a premier destination for outdoor activities. Popular pursuits include boating, water skiing, and fishing for species like rainbow trout, walleye, and kokanee salmon. The area features numerous campgrounds, marinas, and swimming beaches, such as those at Fort Spokane and Porcupine Bay. Historical attractions include the restored St. Paul's Mission near Kettle Falls and the museum at the Grand Coulee Dam Visitor Center. Annual events like the Lake Roosevelt Poker Paddle draw visitors from across the Inland Northwest.

Environmental Issues

Primary environmental concerns involve the accumulation of heavy metals like mercury and lead in sediments, largely from upstream mining operations in the Coeur d’Alene basin and smelter discharges. These contaminants affect water quality and have led to consumption advisories for certain fish species. The dam's operation also creates a barrier to anadromous fish migration, fundamentally altering the Columbia River ecosystem and contributing to the decline of native salmon and steelhead populations. Ongoing monitoring and remediation efforts are conducted by the United States Environmental Protection Agency, the Washington State Department of Ecology, and tribal natural resources agencies.

Management and Administration

The reservoir's water levels and primary operations are controlled by the United States Bureau of Reclamation for hydroelectric power generation at Grand Coulee Dam and water delivery for the Columbia Basin Project. The surrounding lands and recreational facilities are administered by the National Park Service as the Lake Roosevelt National Recreation Area, which works under a cooperative agreement with the Spokane Tribe of Indians and the Confederated Tribes of the Colville Reservation. This partnership addresses natural resource management, cultural heritage protection, and public use. Additional oversight comes from the Federal Energy Regulatory Commission through the dam's licensing and the Army Corps of Engineers on navigational and shoreline matters.

Category:Reservoirs in Washington (state) Category:Columbia River Category:Protected areas of Lincoln County, Washington