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  • 2021 runoff forecast remains below average; Virtual spring public meetings April 6

    Reservoir inflows in the Missouri River basin above Sioux City, Iowa (upper Basin) were well-below average in March. The updated 2021 upper Basin runoff forecast is 21.3 million acre-feet (MAF), 83% of average.

  • Construction project begins below Gavins Point Dam

    YANKTON, S.D. – A large construction contract has begun in the area below Gavins Point Dam along Lake Yankton. The project is to connect relief wells, which are at the bottom, or “toe” of the dam, that are designed to relieve excess water pressure on the earthen structure. There are 75 relief wells and numerous discharges into Lake Yankton. Of those 75 relief wells, 31 will be connected into three main discharges. This will allow for a more controlled discharge. Once the main discharges are installed, the ground will be backfilled with dirt to cover the discharge pipes and prevent any erosion.

  • Construction project begins below Gavins Point Dam

    A large construction contract has begun in the area below Gavins Point Dam, along Lake Yankton, near Yankton, SD. The project is to connect relief wells, which are at the bottom, or “toe” of the dam, that are designed to relieve excess water pressure on the earthen structure.

  • Missouri River virtual spring public meetings to be held April 6

    The Missouri River Water Management Division invites the public to participate in one of two virtual public meetings scheduled for April 6. The meetings will take place at 1 p.m. and 6 p.m. central time. Details for connecting to each webinar is posted to our website.

  • 2021 runoff forecast remains below average; Virtual spring public meeting set for April 6

    *** Updated to add links to schedule for virtual public meetings *** Reservoir inflows in the Missouri River basin above Sioux City, Iowa (upper Basin) were well-below average in February. The 2021 calendar year runoff forecast for the upper basin remains below average. “Very cold February temperatures in the upper Basin locked up tributaries in ice and reduced inflows to the System reservoirs,” said John Remus, chief of the U.S. Army Corps of Engineers’, Missouri River Basin Water Management Division. “Mountain snowpack continues to accumulate in the Rocky Mountains; however, plains snowpack is well-below seasonal averages and soil moisture continues to be much drier than normal.”

  • Crest Road to close Feb. 9 for maintenance

    The U.S. Army Corps of Engineers, Omaha District announced that Crest Road, which crosses Gavins Point Dam near Yankton, South Dakota, will be closed Feb. 9, from 9 a.m. to 12 p.m. for maintenance. People are asked to take an alternate route during the closure.

  • Gavins Point releases increased slightly ahead of colder temperatures

    The U.S. Army Corps of Engineers increased Gavins Point releases from 17,000 cubic feet per second to 19,000 cfs at noon Friday. The National Weather Service’s forecast indicates the lower Missouri River basin will experience extreme cold temperatures for the next 7-10 days. The much colder temperatures have the potential to cause or exacerbate ice formation on tributaries and the mainstem of the lower Missouri River.

  • Initial public scoping a success for Lewis and Clark Lake, Gavins Point Dam master plan update

    Outdoor recreation enthusiasts will reap the future benefits at Lewis and Clark Lake recreation area in Yankton, South Dakota, after the Gavins Point Dam project master plan update, currently underway, is complete — the plan was last revised in 2004.

  • Below average runoff forecast for the upper Missouri River Basin in 2021

    **Updated to correct errors in hydropower table.** The updated 2021 calendar year runoff forecast for the Missouri River Basin above Sioux City, Iowa, continues to be below average. “Despite runoff being slightly above average in January, we expect 2021 runoff to be below average,” said John Remus, chief of the U.S. Army Corps of Engineers’, Missouri River Basin Water Management Division. “Both plains snowpack and mountain snowpack continue to lag behind seasonal averages, and soil moisture continues to be much drier-than-normal.”

  • Spillway gate and generator maintenance will cause water releases throughout October’s paddlefish season

    Anglers in the area for paddlefish snagging season will have some short disruptions due to spillway gate maintenance at Gavins Point Dam, near Yankton, SD, through October 16. The maintenance will require water to flow from a single gate several times a day for 10-15 minutes at a time. Beginning October 19, when upgrades are scheduled for generators, multiple spillway gates will remain open 24 hours a day.