(Washington County, MO.) The Potosi woman who was involved in a traffic accident on Highway 21 Tuesday night at 10:30 in Washington County. 32 year old Stacy L. Sandeberg has died after suffering serious injuries in the crash. According to Highway Patrol Reports, Sandeberg, was driving south on Highway 21, at Brown Hollow Road, when she lost control of her S.U.V. and it ran off the right side of the highway, flew through the air, and smashed into a tree. Sandeberg was not wearing her seat belt when the wreck happened.