News Releases

Archive: 2024
  • Average Garrison Dam releases declining to address downstream ice

    Fluctuations in temperatures in the Bismarck area have resulted in ice formation on the Missouri River and an ice jam just south of Bismarck. To reduce the threat of flooding, releases from Garrison Dam will be decreased today to an average of 22,000 cfs and tomorrow to 19,000 cfs. Releases may be adjusted as needed over the next several days based on the most up-to-date information.
  • Below average runoff forecast for the upper Missouri River Basin in 2024

    The updated 2024 calendar year runoff forecast for the Missouri River Basin above Sioux City, Iowa, continues to be below average. January runoff in the Missouri River Basin above Sioux City was 0.4 million acre-feet, 56% of average. Runoff was well-below-average due to much-below-normal temperatures over the whole Missouri River Basin and below-normal precipitation over most of the upper basin.
  • Dry conditions expected to persist for the Missouri River Basin

    For the 2023 calendar year, Missouri River Basin runoff above Sioux City, Iowa totaled 30.4 million acre-feet (MAF), 118% of average. Despite the above average runoff last year, the U.S. Army Corps of Engineers is forecasting below-average runoff into the mainstem reservoir system this year. For 2024, runoff in the Missouri River Basin above Sioux City, Iowa is forecast to be 20.1 MAF, 78% of average.