A Missouri woman was airlifted to Methodist Hospital in Des Moines for treatment of injuries received in a two-vehicle accident Tuesday east of Irwin. The Iowa State Patrol responded to the scene on Bluebird Avenue and Audubon County Road F24 at approximately 11:55 a.m. The initial investigation revealed that 44-year-old Tatum R. Schmidt of Savannah, Mo. Was southbound on Bluebird Avenue in a 2010 Chevrolet Equinox and failed to stop at the intersection with F24. Forty-two-year-old Nicholas Koeppe of Exira was eastbound on the county road in a 1997 Kenworth semi-tractor trailer at that time and was unable to avoid a collision with the Schmidt vehicle, striking it on the driver’s side. The semi left the roadway to the right, entered the south ditch and rolled, coming to rest on the top. The Equinox came to rest in the center of F24. Koeppe was transported by Irwin Emergency Medical Services to the Myrtue Medical Center in Harlan for treatment of his injuries.