
The Army Corps of Engineers will end Missouri River navigation flow support at the river's mouth near St. Louis on November 15, about two weeks before the normal December 1 end. Gavins Point releases are being cut to 9,000 cfs amid drought, with upper-basin runoff forecast at 63% of average.
Grain that misses the last barges must move by rail or truck or be stored until spring, raising inland freight costs and weakening basis at river terminals. Shorter barge availability tightens freight and supports the barge rate.
Not enough comparable past events yet for a historical read.
After 359 past bearish logistics events, Corn moved a median -0.3% over 5 sessions (44% higher; middle half -1.5% to +1.5%), and -0.5% over 20.
Moves of each commodity's benchmark from the last close before the event. Historical reads pool past events of the same kind; they describe what happened, not what will. Not investment advice.