Work to replace the twin pipes that carry Route 6N over Marsh Run in Conneaut Township, Erie County, is scheduled to start later this month, the Pennsylvania Department of Transportation (PennDOT) announced Thursday.

The bridge is located about one mile north of the intersection with Route 226.

The project will include replacing the existing pipes with a precast box culvert. There will also be limited work to upgrade the super elevation of the roadway approaching the bridge. The roadway alignment will remain the same.

Work is expected start June 27, and be completed by Aug. 29.

Separate truck and car detours will be required during construction. The car detour will be posted using Cherry Hill Rd. and Barney Rd. The proposed truck detour will use Route 18 and Interstate 90. Porky Rd. will be closed to through traffic for approximately three days while the roadway is paved.

The existing structure was built in 1976 and is classified as being in poor condition. Approximately 1,300 vehicles per day use the bridge.

The majority of the work will be completed by employees from the PennDOT Erie County maintenance facility.