PennDOT District 11 is announcing traffic stoppages on the Koppel Bridge (Route 351) in Koppel Borough and North Sewickley Township will begin today, December 3 weather permitting. Traffic stoppages of 15 minutes or less will occur weekdays from 9 a.m. to 3 p.m. on the Koppel Bridge through Tuesday, January 15. Crews from will conduct steel erection for the new bridge from the existing structure. Motorists should expect delays.