The Pennsylvania Department of Transportation announced a revised schedule for work to replace two structurally deficient bridges in Lower Macungie Township, Lehigh County. The bridges are the PA 100 Bridge over Little Lehigh Creek and the Trexlertown Road Bridge over Spring Creek.

Work to replace the bridges was originally scheduled to begin May 31, but will now begin June 8. The new schedule is necessary to allow the proper implementation of a temporary traffic signal.

Work began Monday, May 16 to install a temporary traffic signal at the intersection of East Penn Avenue and Spring Creek Road in Alburtis Borough. The signal was installed to help control additional traffic that is anticipated to flow through the intersection, especially on Spring Creek Road south. The signal will be placed in flash mode, and will be fully operational on June 8.

Then work will begin June 8 to replace the superstructures (decks, beams and parapets) on the PA 100 and Trexlertown Road bridges.

Beginning June 8, PA 100 south will be closed and detoured. The posted detour for PA 100 south will utilize Spring Creek Road and East Penn Avenue/Alburtis Road.

Also, Trexlertown Road will be closed and detoured. The posted detour will utilize Hamilton Boulevard, Weilers Road and PA 100.

Motorists are advised to allow for extra time and use caution while traveling through the area. All work is expected to be complete in November.

The existing PA 100 Bridge was constructed in 1957 and is a single span, concrete box beam bridge that is 83 feet long and 36 feet six inches wide with an average daily traffic volume of 10,309 vehicles. The new structure will be a single span, concrete bulb-tee beam bridge and will be 81feet five inches long and 39 feet six inches wide.

The Trexlertown Road Bridge was constructed in 1957 and is a single span, concrete box beam bridge that is 83 feet long and 36 feet six inches wide with an average daily traffic volume of 5,428 vehicles. The new structure will be a single span, concrete bulb-tee beam bridge and will be 81 feet long and 39 feet six inches wide.