DOVER, Minn. – A truck-semi rig jack-knifed on compacted snow on Interstate 90, injuring the driver, Xavier T Boelter, 26, of Urbana, Illinois, was taken 20 miles to a Rochester hospital. His injuries were described as non-life threatening. The accident was about 11:20 a.m. between the Dover and St. Charles exit ramps. The rig went into median, blocking the westbound lanes. Traffic was detoured north to State Highway 14 on Olmsted County Road 10 and Highway 74. There also were there six other jack-knife accidents across southern Minnesota. By noon the State Patro reported 47 crashes, six with injuries. In addition 17 vehicles needed a tow back onto the road.