So many think that the gas lines are well defined as to location and depth, don't believe it when I worked road construction decades ago we found gas lines, phone lines that were much closer to the surface than listed in the company logs. Once when dreggina a river bottom that had two high pressure gas lines we found them 5 feet higher than the company told us. Yes the operator did need a change of clothes. On another job we cut the President off when we cut a several hundred pair phone line when excavating a creek bed, again not were the company told us and yes the President was not happy the call ended the way it did. We had a gas line hit here in Idaho a few weeks ago again seems the line was not were the maps said it was. just goes to show that not everything is where it belongs