Update September 17, 2026 at 5:30 p.m.
Interstate 29 remains closed between Oregon and Mound City following a crash that took place around 2 a.m. Thursday involving an overturned semi hauling sulfuric acid "suspended" with nitroglycerin.
A post on the Missouri State Highway Patrol Troop H X/Twitter account says the crash resulted in the evacuation of about 30 residences by the Mound City rural fire department. Affected residents were allowed to return home.
The preliminary investigation of the crash indicated the southbound semi went off the road, jackknifed, and overturned, coming to rest on its wheels. The trailer overturned onto its driver's side.
That was followed by a secondary crash where a southbound passenger vehicle struck the trailer.
The driver and a passenger in the semi were taken to a local hospital with minor injuries. The driver of the passenger vehicle was taken to the hospital with moderate injuries. No names were released.
I-29 will remain closed while hazmat crews and the Missouri Department of Natural Resources deal with the hazardous materials.
Click HERE to be directed to MoDOT's road condition website to check if I-29 remains closed.
Update September 17, 2026 at 11 a.m.
The Missouri State Highway Patrol reports Interstate 29 is shut down between Oregon and Mound City following a crash involving hazardous materials.
A post on the MSHP's Troop H X/Twitter account also says the crash resulted in injuries. The patrol's social media does not say if the injuries were the result of the crash and/or exposure to unidentified hazardous materials.
The patrol did report some area residents were evacuated following the crash, which took place Thursday around 2 a.m.
Southbound I-29 traffic is taking the following detour: After exiting in Mound City, those motorists are being directed west on Highway 118 to Highway P, south on P to Highway 159, then north on 159 to re-enter I-29.
Northbound I-29 traffic is exiting at Highway 59 north of Oregon.
Click HERE to be directed to MoDOT's road condition website to check if I-29 remains closed.
