KING OF PRUSSIA, PA — The Pennsylvania Department of Transportation has completed a $6.8 million federally funded project to stabilize two sinkhole-prone sections of U.S. 30 (Exton Bypass) in Chester County, addressing subsurface conditions that threatened the long-term integrity of a major east-west transportation corridor.
The project involved permanent repairs at two locations between Business U.S. 30 (Lancaster Avenue) and Clover Mill Road in West Whiteland and East Caln townships.
PennDOT used a subsurface grouting process to fill underground voids beneath the highway, reducing the risk of additional sinkhole formation and strengthening the roadway’s underlying support.
The technique, known as limited mobility grouting, involved drilling holes through the pavement in a grid pattern and injecting pressurized grout into the ground.
The grout filled subsurface cavities that could otherwise contribute to pavement instability or future roadway failures.
The work addressed conditions beneath the roadway rather than relying solely on surface repairs, providing a longer-term approach to stabilizing the affected sections of the bypass.
In addition to the underground remediation, crews reconstructed pavement, replaced drainage pipes and stabilized roadside swales.
Those improvements addressed roadway drainage and surface conditions alongside the subsurface stabilization work.
Road-Con, a West Chester-based construction company, served as the project’s general contractor.
The $6.8 million construction project was financed entirely with federal funds, with no state or local funding contribution identified in the project financing.
Completion of the work marks the end of the construction phase of PennDOT’s effort to address sinkhole conditions along this section of U.S. 30.
The remediation is intended to reduce the likelihood of future sinkhole-related damage, although the stabilization work does not eliminate all potential risks associated with subsurface conditions.
Motorists can find additional information about regional highway projects, construction activity and traffic conditions through the MyChesCo Traffic Center at https://www.mychesco.com/traffic/.
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