Iowa Reservoirs

Water Levels • Capacity • Storage
June 9 2023

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iowa Reservoir Report

June 9 2023


Iowa has several major reservoirs, including Coralville Lake, Rathbun Lake, and Saylorville Lake. These reservoirs are primarily fed by the Iowa River, Des Moines River, and Chariton River, respectively. Snowpack and mountains are not significant factors in Iowa's hydrology. Coralville Lake has experienced record high water levels in the past, with flooding in 2008 and 2013 causing significant damage. Drought conditions have also affected Iowa's reservoirs, with Saylorville Lake reaching record low levels in 2012. Seasonal trends in Iowa typically involve greater precipitation in the spring and summer months, leading to higher reservoir levels. However, prolonged periods of drought can disrupt this pattern. Overall, reservoirs and dams serve an important role in managing Iowa's water resources and mitigating the risk of floods and droughts.

Location Observation 24hr Change (%) Percent Normal (%) Elevation (ft)
Clear Lake At Clear Lake
Iowa • ID 05460000 		4 ft -0.64 96 1223.44
Black Hawk Lake At Lake View
Iowa • ID 05482315 		6 ft 0.45 90 1213.6
Lake Panorama At Panora
Iowa • ID 05483470 		45 ft -0.04 100 1036.04
Spirit Lake Near Orleans
Iowa • ID 06604000 		14 ft 0.21 101 1403.84
West Okoboji Lake At Lakeside Lab Near Milford
Iowa • ID 06604200 		4 ft 0.9 97 1397.28
Corydon Lake
Iowa • ID 06903677 		5 ft3/s None None 1032.53
Rathbun Lake Near Rathbun
Iowa • ID 06903880 		904 ft 0 100 902

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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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