Damion Louk was third in line of five snowmobiles traveling eastbound in the median of the highway when the left front ski caught deep snow near a culvert snapping the connections and sending him and the snowmobile airborne.
Authorities say Louk was traveling at an estimated speed of 60 miles-per-hour and was thrown approximately 150 feet before landing near the shoulder of the highway. It is believed that his helmet may have not been fastened as it came off during the incident and landed separately.
Louk was transported to the Boone County Hospital and later transferred by helicopter to Mercy Medical Center in Des Moines.
(Reporting by Pat Powers, KQWC, Webster City)