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Category: Water Management - Missouri River
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  • September runoff below average; October public meetings

    September runoff in the upper Missouri River Basin was well-below average, continuing the trend of below-average runoff in 2024. “Although Montana precipitation was wetter-than-normal in September, much of the basin was very dry and warm, causing the September runoff in all reaches above Gavins Point to be well-below average,” said John Remus, chief of the U.S. Army Corps of Engineers’ Missouri River Basin Water Management Division.

  • Yes, the outlet tunnels at Oahe are releasing water

    A combination of planned maintenance and an unscheduled turbine outage at Oahe will result in outlet tunnel operations beginning today. Starting at 10 a.m. today, Sept. 16, the outlet tunnels at Oahe will be releasing 8,000 cubic feet per second of the daily average 31,300 cfs releases.

  • Gavins Point winter releases will be minimum rate

    Abnormally dry or drought conditions are currently present across 73% of the Basin, with drought conditions likely to persist or worsen through November. August runoff was 1.2 million acre-feet (MAF), 86% of average above Sioux City. The updated 2024 calendar year forecast for the upper Basin is 23.8 (MAF), 92% of average. Average annual runoff for the upper Basin is 25.7 MAF.

  • Drought conditions persist in Missouri River Basin through July

    July runoff in the Missouri River basin above Sioux City, Iowa was 2.8 million acre-feet (MAF), 85% of average with below-average runoff in the upper three reaches and above-average runoff in the lower three reaches. The annual runoff forecast above Sioux City, Iowa is 23.9 MAF, 93% of average.

  • Fort Peck Dam resuming normal operations following flow test

    Test flows from Fort Peck Dam, will be ending earlier than expected.  The 2024 flow test from Fort Peck Dam was the first in a series of test flows intended to comply with the 2018 Biological Opinion.

  • System operations returning to normal post flooding

    Significant rainfall led to an above average runoff in the upper Missouri River Basin. June runoff was 6.6 million acre-feet, which is 119% of average and 2.6 MAF higher than forecast. A strong weather system moved into the basin on June 21 producing excessive rainfall in eastern South Dakota, north central and northeastern Nebraska, and northwestern Iowa. The rainfall totals exceeded 600% of normal over the 24-hour period.

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