(Oak Grove) One person was seriously injured after a semi collided with a dump truck on Highway 33 in the Township of Oak Grove Wednesday morning. The preliminary investigation shows that the dump truck was stopped in the westbound lane for construction when a semi, heading westbound, collided with the truck just before 10am. The 67-year-old Campbellsport man operating the dump truck was not injured. The 54-year-old Waupun man driving the semi was transported by ambulance to Aurora Summit Hospital in Oconomowoc with severe injuries. Highway 33 was closed for roughly six hours and re-opened just before 4pm. The Dodge County Sheriff’s Office was assisted on scene by Horicon Police Department, Wisconsin State Patrol, Horicon Fire Department, Horicon EMS, Burnett Fire Department, Beaver Dam Paramedics, LifeNet out of Hartford, Dodge County Emergency Response Team.