UPPER MERION TWP, PA — The Pennsylvania Department of Transportation will begin the next phase of a long-term sinkhole remediation project on U.S. 202 South in Upper Merion Township later this month, triggering a full closure of the roadway that is expected to last through late fall 2026.
PennDOT said Stage 2 construction will start Monday, February 23, under a $22.4 million project to repair and reconstruct southbound U.S. 202, also known as DeKalb Pike. The work is part of a broader effort to address recurring sinkholes on the heavily traveled corridor in Montgomery County, with related improvements extending to Route 29 in East Whiteland Township, Chester County.
Beginning February 23, southbound U.S. 202 will be closed around the clock between Prince Frederick Boulevard and Saulin Boulevard and Henderson Road. Traffic will be detoured using Saulin Boulevard and Henderson Road, while local access to homes and businesses will be maintained throughout the project.
Northbound U.S. 202 was reopened on Tuesday, November 4, 2025, after eight months of construction during the first stage of the remediation effort, which followed repeated emergency repairs and traffic disruptions caused by sinkhole activity.
PennDOT said the new phase will rely on a limited mobility grouting program designed to stabilize the ground beneath the roadway. Crews will drill a grid of holes through the pavement and inject pressurized grout to fill subsurface voids, reducing the risk of future sinkholes. Additional work includes drainage upgrades and full pavement reconstruction.
The project reflects what PennDOT described as the need for a permanent solution after years of recurring sinkholes along the corridor. Heidelberg Materials LLC is serving as the general contractor, and the work is being financed entirely with federal funds.
Motorists traveling through Chester and Montgomery counties are urged to plan ahead and monitor traffic conditions as long-term detours remain in place. For real-time updates, detour information, and regional traffic alerts, drivers are encouraged to visit the MyChesCo Traffic Center before heading out.
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