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  • August inflows much below average in northern Missouri River Basin

    August precipitation was well-below normal in the Missouri River Basin, particularly in the western and far northern portions, which received less than 25% of normal precipitation. The lack of precipitation and dry soil conditions resulted in 74% of average August runoff in the Missouri River Basin above Sioux City, Iowa (upper Basin). The 2020 calendar year forecast for the upper Basin, updated on September 1, is 30.6 million acre-feet (MAF), 119% of average. Average annual runoff for the upper Basin is 25.8 MAF. Runoff in the upper Basin during the remainder of 2020 is forecast to be below average.
  • Gavins Point releases to remain steady through August

    Below-normal precipitation in Montana and Wyoming during July resulted in slightly below-average July runoff in the upper Basin. The 2020 calendar year upper basin runoff forecast, updated on August 3, is 30.9 million acre-feet (MAF), 120% of average. Average annual runoff for the upper basin is 25.8 MAF.
  • ​Releases from Gavins Point Dam to decrease

    “The upper basin runoff forecast has been reduced by about 1 MAF due to the recent dry conditions as well as the National Weather Service’s climate outlook, which is indicating that the remainder of the summer will be warmer and drier than normal. However, the 2020 calendar year runoff forecast remains above average, mostly due to the very wet soil conditions during the early months of the year. Most of the mountain snowmelt runoff has entered the reservoir system. Remaining summer runoff will depend on rainfall events,” said John Remus, chief of the U.S. Army Corps of Engineers’ Missouri River Basin Water Management Division. “As a result of the reduced runoff forecast, we will reduce Gavins Point Dam releases to 30,000 cfs on July 7,” Remus added.
  • Upper Missouri River basin forecast remains above average

    Water releases from Gavins Point Dam will remain at 33,000 cubic feet per second in June, which is about average. May runoff in the upper Basin was about 130% of average; however, the summer climate outlook indicates a return to warmer and drier conditions in the upper Basin.
  • Proposal for Gavins Point Dam underseepage control measures available for public comment

    The U.S. Army Corps of Engineers, Omaha District, is seeking comments on a draft environmental assessment for a proposal to implement additional underseepage control measures at Gavins Point Dam near Yankton, South Dakota. Comments on the draft EA will be accepted until May 27, 2020.
  • Missouri River water management public meeting presentations available online

    The U.S. Army Corps of Engineers’ Missouri River Water Management Division has released four videos of presentations that would normally be given at public meetings held throughout the Missouri River Basin. In-person public meetings on Missouri River Mainstem Reservoir System operations originally scheduled for April were canceled to further reduce potential exposure to COVID-19. Instead, the agency will host virtual question and answer sessions in late April. A web page with the videos, a form for submitting questions, and call in dates and times is located here: https://go.usa.gov/xvBpc.