Washington Reservoirs

Dam Levels • Capacity • Storage
April 26 2024

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washington Reservoir Report

April 26 2024


Location Observation 24hr Change (%) Percent Normal (%) Elevation (ft)
Wynoochee Lake Near Grisdale
Washington • ID 12035380 		787 ft 0.07 100 708.35
Mud Mountain Lake Near Buckley
Washington • ID 12098000 		923 ft 0.1 100 1253.15
Lake Tapps Near Sumner
Washington • ID 12101000 		541 ft 0.01 100 531.36
Howard A Hanson Reservoir Near Palmer
Washington • ID 12105800 		1,155 ft 0.07 100 1206
Chester Morse Lake At Cedar Falls
Washington • ID 12115900 		1,560 ft 0.01 100 1565.28
Cedar Lake (Masonry Pool) Near Cedar Falls
Washington • ID 12116060 		1,560 ft 0.01 100 1548.55
Sammamish Lake Near Redmond
Washington • ID 12122000 		26 ft 0.19 99 33
South Fork Tolt Reservoir Near Carnation
Washington • ID 12147900 		1,760 ft 0.03 100 1771
Diablo Reservoir Near Newhalem
Washington • ID 12176500 		1,201 ft -0.03 100 1046.7
Baker Lake At Upper Baker Dam Near Concrete
Washington • ID 12191600 		712 ft 0.08 100 730
Lake Shannon At Concrete
Washington • ID 12193000 		408 ft -0.19 99 443
Franklin Roosevelt Lake At Grand Coulee Dam
Washington • ID 12436000 		1,284 ft 0 103 1175.16
Osoyoos Lake Near Oroville
Washington • ID 12439000 		911 ft 0 100 908.56
Lake Chelan At Purple Point At Stehekin
Washington • ID 12451200 		1,090 ft 0.01 100 1093.1
Lake Chelan At Chelan
Washington • ID 12452000 		1,090 ft 0 100 1100
Lenore Lk Near Soap Lk
Washington • ID 12469500 		1,076 ft 0 100 1084.47
Soap Lk Near Soap Lk
Washington • ID 12470000 		1,071 ft 0 100 1078.46
Moses Lake At Moses Lake
Washington • ID 12471000 		1,046 ft 0.01 None 1050
Lake Scanewa Near Kosmos
Washington • ID 14233490 		-999,999 ft None None 827.97
Castle Lake Nr Mount St Helens Nr Spirit Lake
Washington • ID 14240446 		2,578 ft 0.01 100 2579.71

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Largest Reservoirs

By water storage capacity

The USA is home to many of the largest dams in the world, providing essential services such as water storage, hydropower generation, and flood control. Among them, Oroville Dam stands out as the tallest dam in the United States, located in northern California. Another famous dam is the Hoover Dam, located on the Colorado River between Arizona and Nevada. It is a major tourist attraction and an engineering marvel of the modern era, providing hydropower and water storage for millions of people.

Other notable dams in the USA include the Glen Canyon Dam in Arizona, which is the second-highest concrete arch dam in the country, and the Grand Coulee Dam in Washington, which is the largest electric power-producing facility in the USA. These dams are a critical component of the country's infrastructure, providing essential services for the economy, society, and the environment.

Reservoir Storage Capacity (acre-ft)

Drought Levels

By water storage capacity

The number and distribution of dams and reservoirs in the USA have been significantly impacted by climate change. The changing climate has led to changes in precipitation patterns, increased evaporation rates, and more frequent and severe droughts and floods in certain regions. These factors have influenced the management and operations of dams and reservoirs across the country.

Reservoir Storage Capacity (acre-ft) Percent of Normal (%)

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