(Calumet) An ATV operator was seriously injured after their vehicle overturned in the Township of Calumet Tuesday morning. Fond du Lac County Sheriff’s deputies were dispatched to a field near N10233 St. Paul Road around 9:30am. The investigation showed that a Chilton man was traveling west in the field when he looked over his shoulder and the ATV went across a line that was pumping fertilizer. The 51-year-old lost control of the vehicle, causing it to roll, and ejected him off. The man was transported to the hospital in Neenah by helicopter. Authorities say the man was not wearing a helmet.