PTC Bridge EB-311 Replacement, PA
AEG, a SOCOTEC Company provided geotechnical and civil engineering services for the replacement of PTC Bridge EB-311 in Dauphin County, PA, supporting the Pennsylvania Turnpike Commission’s broader Mainline reconstruction program.
Key Information
Project: PTC Bridge EB-311
Client: Pennsylvania Turnpike Commission
Location: Lower Swatara Township, Dauphin County, PA
Services Provided: Geotechnical services and Construction inspections
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The Challenge
Supporting a Critical Turnpike Bridge Replacement
Bridge EB-311 was replaced as part of the Pennsylvania Turnpike Commission’s Total Reconstruction Initiative, which is improving infrastructure along the Turnpike Mainline.
Located in Lower Swatara Township, the bridge carries SR 441 (North Union Street) over the Pennsylvania Turnpike and serves approximately 9,000 vehicles daily.
The existing structure needed to be replaced with a bridge that could provide better horizontal and vertical clearance while supporting the complete reconstruction of the Mainline corridor in this area.
The project also required a detailed understanding of subsurface conditions before foundation and pavement decisions could be finalized. Site-specific information was therefore essential to developing appropriate recommendations for the new structure and surrounding infrastructure.
Effective coordination was another important consideration as the project moved from design into construction. Engineering questions and submittals needed to be addressed efficiently to maintain progress on this active transportation project.
The Solution
Site-Specific Geotechnical and Civil Engineering
AEG, a SOCOTEC Company provided engineering support throughout the design phase, beginning with subsurface investigations coordinated through the PTC’s Open-End Boring Contract.
The project-specific scope included:
- Conducting subsurface investigations
- Performing in-house laboratory testing
- Completing detailed geotechnical analyses
- Developing foundation recommendations based on site conditions
- Performing infiltration investigations
- Assisting with pavement design
- Providing responsive field coordination
- Conducting expedited construction submittal reviews
As construction progressed, AEG continued to support the project through responsive coordination and timely technical review. This continuity allowed questions arising during construction to be addressed efficiently without separating design knowledge from field implementation.
AEG, a SOCOTEC Company provided engineering support throughout the design phase, beginning with subsurface investigations coordinated through the PTC’s Open-End Boring Contract.
The project-specific scope included:
- Conducting subsurface investigations
- Performing in-house laboratory testing
- Completing detailed geotechnical analyses
- Developing foundation recommendations based on site conditions
- Performing infiltration investigations
- Assisting with pavement design
- Providing responsive field coordination
- Conducting expedited construction submittal reviews
As construction progressed, AEG continued to support the project through responsive coordination and timely technical review. This continuity allowed questions arising during construction to be addressed efficiently without separating design knowledge from field implementation.
The Results
Advancing Safety and Mobility Ahead of Schedule
The replacement of Bridge EB-311 delivered a new structure designed to support safer and more efficient movement along this part of the Pennsylvania Turnpike network.
AEG’s responsive engineering support helped streamline the construction process and contributed to the project being completed ahead of schedule.
The new bridge opened to traffic in 2022, advancing the Pennsylvania Turnpike Commission’s ongoing reconstruction of the Mainline corridor in Lower Swatara Township.
The project demonstrates how informed geotechnical recommendations and timely engineering support can contribute to efficient delivery on complex transportation infrastructure projects.
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