One Dead in Rural Clarksville Traffic Accident One person has died in a traffic accident late Wednesday night (April 21), near Clarksville, in Butler County. The Iowa State Patrol was called to the accident scene, just before 10:30pm. It happened at the intersection of Highway 3 and Ridge Avenue, south of Clarksville. A minivan was headed north on Ridge Avenue, and failed to stop for a stop sign at the intersection. Getty Images A westbound car struck the van on the passenger side, and both vehicles went into the ditch. Get our free mobile app One person was killed in the accident, however the Iowa State Patrol is withholding any more information until relatives can be notified.