I-76 Viaducts

Construction Update: Summer 2021: PROJECT COMPLETED

Construction on Center City Viaduct Substantially Completed

June 22, 2021 – Construction to rehabilitate the deteriorated Interstate 76 viaduct between University Avenue and 30th Street has wrapped up, including structural and drainage system repairs, rehabilitation of the concrete deck, and construction of a new median barrier on the mile-long Center City structure

Weeknight and weekend lane restrictions between University Avenue and 30th Street that had occurred regularly since the start of the repair project in spring 2019 have come to an end. 

Since starting the $39.8 million project in spring 2019, PennDOT has rehabilitated the support columns beneath the viaduct, cleaned and refurbished the viaduct’s stormwater drainage system, repaired the concrete deck’s expansion dams and parapets, milled and repaved the viaduct’s riding surface, and installed a new concrete median barrier.

For the new riding surface, PennDOT used a fast-curing synthetic polyester polymer concrete (PPC) that allowed the viaduct’s surface to be rehabilitated while minimizing the need for long-term lane closures normally required for conventional concrete paving materials.

The project also rehabilitated the bridge that carries the Schuylkill Expressway over Route 23 and Arrowmink Creek in West Conshohocken Borough, Montgomery County, and completed similar repairs to several other I-76 bridges and culverts in Montgomery County.