Oregon State Police (OSP) is continuing the investigation into Sunday evening’s two vehicle fatal crash in Highway 18 near Sheridan. On Sunday October 13, 2019 at about 10:15 PM, OSP troopers and emergency personnel responded to a two vehicle head-on crash on Highway 18 near milepost 35. Preliminary investigation indicates that a Chevrolet pickup, operated by Mark DALY, age 60, from Portland, was eastbound on Highway 18 when for unknown reasons it crossed the center line. After crossing the center line, the Chevrolet pickup hit a westbound Ford F150 pickup, operated by Shawn SMITH, age 42, from Sheridan. Both drivers were pronounced deceased at the scene. There were no passengers in either vehicle. Highway 18 was closed for about four (4) hours following the crash.