PINE ISLAND, Minn. — An Iowa driver was injured when his light-weight sedan departed the roadway and oveturned off U.S. Highway 52 just of Pine Island. Hamilton Steve Guerrero, 18, of Waterloo, was taken 20 miles to a Rochester hospital.  Zumbrota police described his injuries as non-life threatening. The accident was about 4 a.m. Guerrero was alone and belted in the 2003 Honda Accord. He was headed north toward St. Paul.