April runoff was 48% of normal in the Missouri River Basin
5/8/2025 5:36:24 PM
CATEGORIES:
Relief, Response & Restrictions
Water Supply & Quality
AFFECTED AREAS:
Montana
North Dakota
Nebraska
South Dakota
Start Date: 4/1/2025
- End Date: 4/30/2025
The updated 2025 calendar year runoff forecast for the Missouri River Basin above Sioux City, Iowa, continued to be below average. April runoff in the Missouri River Basin above Sioux City was 1.4 million acre-feet, 48% of average.
The 2025 calendar year runoff forecast above Sioux City is 20.0 MAF, 78% of average. The runoff forecast is based on current soil moisture conditions, mountain snowpack, and long-term precipitation and temperature outlooks.
Gavins Point Dam releases will continue to provide navigation flow support at 4,000 cfs below full service for the first half of the navigation season through June 30.
The six mainstem power plants generated 727 million kWh of electricity in April. Typical energy generation in April is 695 million kWh. Forecast generation for 2025 is 8.6 billion kWh compared to the long-term average of 9.4 billion kWh.
US Army Corps of Engineers Northwestern Division, May 8, 2025
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