Philadelphia Interstate 95 Section GIR Reconstruction

Dawood, a wholly owned subsidiary of Woolpert, is involved in the reconstruction and structural design of the I-95 Section GIR for the Pennsylvania Department of Transportation District 6-0 and City of Philadelphia. Currently in the construction phase, this project encompasses Girard Avenue interchange and three miles between Race Street, I-676, and Allegheny Avenue.

The project team designed two 11-span (three continuous units in a four-three-four configuration) prestressed concrete PennDOT bulb tee beam bridges located over Sergeant and Huntington Street. Materials used include a concrete pier bent substructure foundation on piles — center section of a 26-span viaduct.

Additional bridge designs over Columbia Avenue and Shackamaxon Street include two single-span prestressed concrete spread box beam bridges. The Shackamaxon Street bridge utilized full-height abutments on spread footings.

Along the corridor, the project team designed seven precast modular retaining walls extending 3,600 linear feet. Signing and sign lighting design includes two full-span gantries, two cantilever gantries, four type A and B structures, and two special designs.

The geotechnical team administered and managed boring contracts, micropile inspections, and foundation design reports. The team also provided investigations for bridges, retaining walls, ground improvement design, digital messaging systems sign and static sign structures, and Philadelphia Water Department outfall pipes.

As the main U.S. north to southeast interstate, I-95 extends from Miami, Florida, to Maine’s Canadian border, passing through 15 states. This interstate serves as the principal road connecting Philadelphia to Washington, D.C., New York City, and Boston. I-95 serves 110 million people and facilitates 40% of the nation’s gross domestic product.