On Friday at 10:03 the Bremer County Sheriff’s Office responded to a two vehicle accident at the intersection of Hwy 63 and 160th St. A dump truck pulling a dump trailer driven by Mark Ackerson, 57 of Sumner was traveling northbound on Hwy 63 and turning east onto 160th St. A semi and tanker trailer driven by Gregory Korfe, 64 of Long Prairie, MN was also traveling northbound on Hwy 63 and rear-ended Ackerson. Korfe was transported to Rochester, MN by AirCare. Northbound lanes of Hwy 63 remained closed for approximately 4 hrs. The Bremer County Sheriff’s Office was assisted by the Tripoli Fire Department, Tripoli Ambulance, Frederika Fire Department, Frederika First Responders, Iowa DOT, Iowa State Patrol, AirCare and Rasmusson’s Towing.