Condition assessment helps optimize pipe lining program
A large college town in Delaware, plagued by an increasing number of water main breaks, employed ePULSE acoustic condition assessment technology to help determine whether its aging pipes were suitable for lining rather than replacement. Lining was their preferred path, if possible, because of the reduced cost and minimal customer disruption versus replacement. The project assessed 12,400 feet of 6- to 12-inch CI and steel pipe in critical locations under major roads, railroad tracks, and rivers, along with representative neighborhood locations. The tests revealed that much of the pipe exhibited too much structural degradation to be suitable for non-structural lining. The utility was surprised to find a street where one pipe segment had about 60% loss but the next two segments had no measurable loss, indicating a change from unlined pipe to lined pipe mid-block, which was not indicated in the master plan.