One person was seriously injured when two motorcycles collided in Dodge County. The crash happened shortly before 8pm Sunday night on Highway T near Stark Road. A 33 year old Waterloo man was flown by helicopter to UW Hospital in Madison with serious but non life-threatening injuries. The operator of the other motorcycle received minor injuries and a passenger was transported to the hospital with non life-threatening injuries. The Sheriff’s Office says alcohol was a factor in the crash. No helmets were worn by anyone involved.