Missouri Sedimentation Action Coalition

09/09/2025

August runoff was 1.5 million acre-feet, 109% of average above Sioux City with most of the runoff entering the System below Garrison Dam. September runoff in the upper Basin is forecast to be well

08/25/2025

05/08/2025

Join us for the 24th Annual Membership Meeting Wednesday, May 14 in Yankton. The meeting will begin at 10 am and will be held in the United Way's community rooms at 920 Broadway Avenue in Yankton. Remote link available.

24th Annual Meeting – Wednesday, May 14, 2025 in Yankton Posted on April 27, 2025April 28, 2025Author adminCategories Uncategorized Register for virtual meeting link SAVE THE DATE!Exploring the recreational value produced by the Lewis and Clark Lake Region to spark discussion at MSAC’s Annual Me...

11/27/2024

Addressing a percentage of the incoming sediment is certainly a good start; looking forward to exploring this technology more and finding beneficial uses for the material.

11/06/2024

Check this out about the Bedload Collector Pilot Project which took place in September in the Niobrara River, just outside the community of Niobrara.

10/09/2024

University of South Dakota students visited Springfield Saturday morning for a first-hand look at sedimentation and a new water plant in the final phases of construction. Sixteen students in the Introduction to River Studies class were headed to the Niobrara area next. MSAC executive director Scott Kostal visited with the group at Terrace Park which provides a delta view. Next, he put on his Mayor of Springfield hat and talked water plant and river/lake water intake. MSAC appreciates the visit and opportunity to discuss sedimentation with students.

10/07/2024

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.

“Runoff in the basin below Sioux City has also been well-below average during late summer and fall, so System releases from Gavins Point Dam have been increased to maintain the flow support level to meet downstream navigation targets,” Remus added.

Except for central Montana, which received greater than 150% of normal precipitation in a few days during late September, widespread areas of the upper Missouri River Basin received less than 25% of normal precipitation. According to the Sept. 24 drought monitor, over 81% of the Missouri River Basin is under abnormally dry or drought conditions. As a result, September runoff was 0.8 million acre-feet, 66% of average above Sioux City. The updated 2024 calendar year forecast for the upper Basin above Sioux City is 23.5 MAF, 91% of average, and 18.3 MAF above Gavins Point Dam, 79% of average. Average annual runoff for the upper Basin above Sioux City is 25.7 MAF.

http://spr.ly/6181UTqmW

09/29/2024

The U.S. Army Corps of Engineers, Omaha District, has initiated three new Continuing Authorities Program pilot projects to support communities in South Dakota, Nebraska, and Colorado.

These efforts are part of a national pilot program, announced last month by the Assistant Secretary of the Army, Civil Works, that will support and partner with 12 rural or economically disadvantaged communities across the United States.

The three pilot projects selected in the Omaha District’s area of responsibility will serve:

- Flandreau Santee Sioux Tribe, South Dakota: To reduce the risk of erosion affecting cultural use of the area, restore riverine habitat and reduce overland pollution flows from agricultural lands.
- Omaha Tribe, Nebraska: To reduce the flood risk to local water wells.
- City of Boulder (Open Space and Mountain Parks), Colorado: To restore floodplains and wetlands on a publicly owned site near an area that is historically and culturally significant to the Arapaho and Cheyenne Nations.

Read the full article to learn more here: https://www.nwo.usace.army.mil/Media/News-Stories/Article/3916214/usace-omaha-district-starts-three-new-cap-projects-expands-efforts-to-serve-dis/

09/13/2024

In case you missed it, the video of the Town Hall meeting is now available on MSAC's YouTube channel.

MSAC hosted a town hall meeting during the Bedload Collector Pilot Project Week in September 2024. Paul Boyd, hydraulic engineer with the US Army Corps of En...

09/12/2024

Get a bird's eye view of the Bedload Collector Pilot Project Thursday, Sept. 12, from 10 am to 5 pm at Campsite #25 at Niobrara State Park. The week-long Pilot Project is going on directly across the Niobrara River. MSAC staff will be on hand at the #25 campsite to hear your feedback and questions. Thursday USACE and USGS staff will continue to gather data as the project completes mid-day Friday. Park passes are available at the park entrance. Campsite #25 is located in the RV campground in Niobrara State Park just west of Niobrara on Highway 12.

09/11/2024

The Town Hall Meeting about the Bedload Collector Pilot Project is starting at 6 pm tonight at the Niobrara Fire Hall Meeting Room. Come in at 5:30 pm for the open house. If you can't make it in person, we have a virtual link available.
You can find the registration link at www.msaconline.com/lessening-the-load-pilot-project/ Once you register, you will be sent an email with the link. Any issues email me at [email protected]

09/10/2024

Public is invited to a Town Hall Meeting Wednesday (Sept. 11) at the Niobrara Fire Hall Meeting Room. Open house will begin at 5:30 pm with a presentation from USACE and USGS staff at 6 pm. For those who can't join us in person there will be a virtual option.

Visit our website for more info and the link to register for the virtual meeting Wednesday at 6 p.m. https://www.msaconline.com/lessening-the-load-pilot-project/