PennDOT officials said the work is supposed to start next Monday and take about two years. The span, which connects Birdsboro and Exeter Township and handles about 8,400 vehicles a day, will remain open while a new one is built just west of it.
The $14.5 million project was supposed to start in March but was delayed by the discovery that the area around the bridge is a habitat for red-bellied turtles, a threatened species. That required additional planning.
At the same time, PennDOT also needed to negotiate with nearby property owners to obtain rights-of-way.