said by Ohstop :This is a problem waiting for a techology solution... anything from microchips to radioactivty markers/tracers to create a process of detection and mapping for gas lines. Over 40 years of laying gas lines and nobody's figured it out yet..
This could happen with any sort of utility. Coaxial cable, twisted pair copper, heck even additional GAS LINES could cause an explosion if the company doing the digging doesn't get a proper mark out done before digging. This could also easily apply to people planting new trees or bushed, towns installing new curbs or sidewalks, even pothole repair.