Underground Construction Technology International Conference & Exhibition

Cross bores of sanitary sewers by natural gas distribution lines were first reviewed by NTSB in 1976. Trenchless techniques including moles, plows and horizontal directional drill techniques are frequently implicated where cross bores have been found. The gas distribution industry has a wider reaction to injuries, damage and deaths that have resulted. SES and project management have resulted in CBSA Guidelines for Cross Bore Elimination. These guidelines will be presented and a discussion of new technologies and techniques for legacy cross bore elimination will be included.