The US Army Corps of Engineers St. Paul District dewatered Lock and Dam 4 near Alma, Wisconsin for inspection and repairs. The article cites an ASCE grade of D+ for inland waterways and about 9,700 tows delayed by an average of 12.23 hours in 2020.
Aging locks and winter maintenance closures create recurring delays for upper Mississippi grain barges, which adds freight cost and can slow shipments to export elevators.
Not enough comparable past events yet for a historical read.
After 1,054 past logistics events, Corn moved a median -0.1% over 5 sessions (48% higher; middle half -1.5% to +1.5%), and -0.0% over 20.
After 837 past logistics events, Soybeans moved a median +0.4% over 5 sessions (55% higher; middle half -1.5% to +2.0%), and +0.6% 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.