FRANKLIN ROOSEVELT LAKE AT GRAND COULEE DAM

RESERVOIR LEVELS
February 6, 2025
1,175 ft 47.96, -118.98


YEAR OVER YEAR

°F

°F

mph

Windspeed

%

Humidity

Grand Coulee, located in Okanogan, Washington, is a concrete gravity dam on the Columbia River that was completed in 1941 by the Bureau of Reclamation. Standing at a height of 550 feet with a hydraulic height of 380 feet, this dam serves the primary purpose of flood risk reduction along with irrigation. With a normal storage capacity of 9,562,000 acre-feet and a maximum discharge of 265,000 cubic feet per second, Grand Coulee plays a crucial role in managing water resources in the region.

Owned and operated by the Bureau of Reclamation, Grand Coulee is a significant structure with a high hazard potential and very high risk assessment. The dam spans a length of 5,673 feet and has a spillway width of 1,485 feet, showcasing its impressive scale and engineering design. While the condition assessment of the dam is not available, regular inspections and emergency action plans are in place to ensure its safety and reliability in the face of potential hazards.

As a key component of the water infrastructure in the area, Grand Coulee contributes to the management of the Columbia River and plays a vital role in water supply, flood control, and irrigation for the region. With its strategic location and impressive specifications, this dam stands as a testament to human ingenuity in harnessing and managing water resources amidst changing climatic conditions.

Lake Or Reservoir Water Surface Elevation Above Ngvd 1929, Ft 24hr Change 0%
Percent of Normal 100%
Minimum 1,217.69 ft
2011-05-07
Maximum 1,290 ft
2011-08-02
Average 1,278 ft
Dam_Height 550
Hydraulic_Height 380
Drainage_Area 74100
Year_Completed 1941
Nid_Storage 9562000
Structural_Height 550
Primary_Dam_Type Concrete
Foundations Rock
Surface_Area 82300
Hazard_Potential High
River_Or_Stream COLUMBIA RIVER
Dam_Length 5673
Nid_Height 550
Reservoir Levels
       

Get Unparalelled Insights

Explore the 3D Map


Weather Forecast

Featured Destination

Crown Point State Park

Crown Point State Park, located in Washington state, is a beautiful destination with several reasons to visit. The park offers breathtaking views of the Columbia River Gorge and the Beacon Rock. Visitors can enjoy hiking, fishing, boating, and wildlife watching in the park. The park also has a picnic area, playground, and a boat launch. One of the main points ...