One of the most potentially hazardous situations is accidental contact with underground electric power lines, natural gas lines, communication lines, and other utility services.
You can avoid this problem by calling 811 toll-free. Calling before you dig can not only save you money from a damage claim, it can also save your life.
Learn more at their website http://kentucky811.org/.
Any gas line installation is required to follow NFPA Code 54.