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  • Join USACE water managers for public meetings on Missouri River system operations

    After a season of virtual-only updates, USACE Missouri River water managers look forward to meeting with members of the public in person this spring. The public is invited to join the U.S. Army Corps of Engineers and local weather experts for a series of briefings on the 2026 runoff season, reservoir status, and our planned operations for the year ahead.

  • Dry outlook persists for Missouri River despite early spring runoff; Navigation support to begin mid-March

    Warm February temperatures triggered early snowmelt and runoff in the Missouri River Basin above Sioux City, Iowa, but the overall 2026 runoff forecast remains well below average. February runoff was 1.3 million acre-feet, 113% of average. Despite this above average runoff in the Garrison, Oahe, and Gavins Point reaches, the full-year runoff forecast above Sioux City, Iowa is 20.6 MAF, 80% of average.

  • Crest Road at Gavins Point Dam scheduled to close April 11

    The U.S. Army Corps of Engineers, Omaha District announces tentative plans to close Crest Road by the powerplant at Gavins Point Dam, Yankton, South Dakota, April 11 to June 22.

  • USACE, Omaha District seeks input and comments on Draft Master Plan for Gavins Point Dam and Lewis and Clark Lake Project through April 8, 2022; Public Online Webinars Scheduled

    The U.S. Army Corps of Engineers (USACE), Omaha District is seeking public, agency, tribal, and stakeholder comments on the Draft Master Plan and Programmatic Environmental Assessment for Gavins Point Dam and Lewis and Clark Lake through Friday, April 8, 2022.

  • Generator maintenance will result in water releases through spillway gates at Gavins Point Dam

    Maintenance on the generators at Gavins Point Powerplant near Yankton, South Dakota, will result in the need to release water through the spillway gates through Sept. 30.

  • Gavins Point spillway flow forecast during archery paddlefish season

    Completion of work being done on a generator at Gavins Point Dam, near Yankton, SD, will allow spillway gates to be closed near the start of archery paddlefish season. The work, which included repairs on the turbines, will be completed ahead of schedule on May 31. As soon as the generator has been checked, and is cleared to return the service, the spillway gates will be closed. Pending any unforeseen problems, the unit is expected to be returned to service on Thursday, June 3rd.

  • Crest Road Closed Monday, May 24 for maintenance

    The road that crosses Gavins Point Dam near Yankton, South Dakota, also known as Crest Road, will be closed Monday, May 24 from 8 a.m. to 12 p.m. for maintenance. People are asked to take alternate routes during the closure.

  • Gavins Point Dam powerplant generators will be shut down for inspection

    The U.S. Army Corps of Engineers, Omaha District announces that all three generators at the Gavins Point Dam powerplant near Yankton, South Dakota, will be shut down to allow for the underwater inspection of the draft tube gate slots on the downstream side of the powerplant. During this outage, all 14 spillway gates will be open to meet the authorized purposes downstream.

  • 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.