An 8-inch diameter propane pipeline crosses Panther Run in Rockton, PA. All-terrain vehicle (ATV) traffic had created several small streams over the pipeline. The channel bed of Panther Run had degraded, and the banks had begun to migrate, leaving the pipeline exposed.
A 22-inch diameter natural gas pipeline that crosses the northwest branch of the Anacostia River in Silver Spring, MD, had become exposed due to bank erosion and lateral migration of the channel. Previously placed rock failed to remediate the erosion issue.