Work will start Thursday, March 1 to replace Spring Creek Road bridge over Spring Creek in Lower Macungie Township, according to PennDOT.
Spring Creek Road will be closed and detoured between Trexlertown Road and Red Oak Road. Traffic will be detoured onto Mill Creek Road, Lower Macungie Road, Hamilton Boulevard and Trexlertown Road.
Allow extra time when travelling through that area. Spring Creek Road's average daily traffic is more than 5,600 vehicles.
The project is expected to be done in October 2012 depending on weather conditions.
The structurally deficient steel I-beam bridge will be replaced with a concrete box-beam bridge.