A 20-year-old woman died in a two-vehicle crash three miles west of Watertown Monday morning.
State officials say Ashley Lane of Florence, South Dakota, was going west on Highway 20 when she crossed the centerline and hit a semi in the east lane.
Lane died at the scene. The Arkansas man driving the semi was uninjured. Authorities say both drivers were wearing their seatbelts.
The South Dakota Highway Patrol is investigating the crash.