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Inertial locating is an innovative technology that is used to accurately map underground pipe networks. But to date the technology has required non-pressurized pipes. Now a PHMSA-sponsored project has demonstrated that the technology can be applied to small-diameter pressurized gas lines with no disruption of service to customers. The Reduct DuctRunner inertial mapping technology, about which I have blogged previously, allows mapping networks of (unpressurized) pipes with various diameters for distances of up to 2 km (1.25 Miles) with a precision of 15 cm (6 Inches) horizontally and vertically.Website - https://onthemarklocators.com