About this Project

This project spans seven miles of SR 0422 between the Berks County line and the Sanatoga Interchange, encompassing six interchanges and numerous bridges, several of which are rated Critical or Structurally Deficient. PennDOT’s initiative includes replacing six major bridges—two of which are over the Schuylkill River—reconstructing deteriorated pavement, improving deficient geometry, and upgrading interchanges to meet current design standards.

AEG is providing environmental, geotechnical, survey, and Right-of-Way services across multiple phases. Environmental efforts include Phase I/II/III Environmental Site Assessments (ESAs), hazardous waste investigations, wetland delineation, and Level 2 Categorical Exclusion Evaluations (CEEs) for NEPA clearance. AEG led public involvement and developed a GIS database with 3D graphics showing contaminant zones and geotechnically unsuitable materials in cross-section and profile views. The Phase III ESA involved a joint geotechnical and environmental drilling program to characterize impacted soils for structural and disposal planning.

Geotechnical services include boring, sampling, and lab testing; pavement design; and preparation of Roadway and Structure Reconnaissance Reports, Geotechnical Engineering Reports, and Foundation Reports. At one river crossing, AEG proposed wick drains instead of over-excavation, which reduced settlement impacts and saved $200,000. Additional cost savings were achieved by eliminating approximately 1,000 linear feet of retaining wall through slope stability analyses.

Survey and Right-of-Way services included locating property corners in acquisition areas, performing supplemental field surveys with GPS and total stations, and mapping unmapped features. AEG also handled utility location, bridge clearance documentation, and underwater surveys at stream crossings.

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