Although overall runoff for September 2025 in the upper Missouri River Basin was above average, runoff in the Fort Peck and Garrison reaches continues to be well-below average.
“Beneficial rainfall occurred over central South Dakota and North Dakota in September resulting in well-above average runoff into Oahe, Big Bend, Fort Randall, and Gavins Point,” said John Remus, chief of the U.S. Army Corps of Engineers’ Missouri River Basin Water Management Division.