THISTLE, Utah - The Utah Department of Transportation says a stretch of a rural highway in central Utah will remain closed until Monday morning for repairs after flash flooding from storm runoff sent mud and debris over the roadway.

The department said the flooding Friday night closed U.S. 89 south of the junction with U.S. 6 at Thistle, which is 58 miles (93 kilometres) south of Salt Lake City and that drivers should use alternate routes.

The Highway Patrol said Friday night that 2 feet (0.6 metres) of rock and mud covered the highway.

Utah Highway Patrol Sgt. Nick Street said about 30 cars were stuck between debris fields but that emergency personnel reached the vehicles and determined that nobody was injured.