Rebuilding I-95 with innovative geotechnical solutions
- Owner: PennDOT District 6-0
- Location: Philadelphia County, PA
About this Project
SR 0095-CPR
This $299 million project reconstructed and widened approximately 1.4 miles of I-95 between Bleigh Avenue and Levick Street, including a complete reconfiguration of the Cottman/Princeton interchange. AEG’s scope included eight mainline structure replacements or widenings—such as the multi-span State Road Viaduct—new and relocated ramp structures, retaining walls, overhead signage, ITS facilities, and major utility relocations. AEG led all geotechnical investigations and foundation designs, including shallow, pile, drilled shaft, and reinforced soil slope alternatives. Temporary embankments were engineered to protect adjacent 84″ water and 126″ sewer mains. AEG redesigned a 700-foot retaining wall to use shallow foundations with surcharge and settlement monitoring, yielding significant cost and constructability benefits. Pavement design included concrete and Superpave sections with life-cycle analyses, and AEG contributed to one of Pennsylvania’s first high-performance concrete pavement specifications. Survey efforts included aerial calibration, supplemental topographic surveys, and digital terrain modeling. Environmental services included Phase II ESA support and hazardous materials sampling.
SR 0095-BSR
This $589 million project will reconstruct and widen 1.7 miles of I-95 from Margaret Street to Levick Street, including the Bridge Street interchange. AEG managed extensive geotechnical investigations, among the most complex in District 6-0’s history, coordinating multiple drilling contracts, nighttime operations, and utility interfaces within active construction zones. Foundation designs included shallow, pile, drilled shaft, and micropile systems, with reinforced soil slopes used for staging. AEG developed an integral abutment foundation for the Aramingo Avenue bridge over Frankford Creek. Lab testing was performed in-house and coordinated externally to meet aggressive schedules. The project also includes multi-use trails, pedestrian lighting, green infrastructure, and stormwater management features, reflecting a broader commitment to community connectivity and environmental resilience.
AEG developed and performed infiltration testing programs to meet current state and local stormwater management and green infrastructure requirements. AEG also developed a subsurface investigation program and subsequent recommendations to obtain Philadelphia Water Department (PWD) approval for installing new and relocated PWD facilities.
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