You may or may not know about the law requiring you call for utility locating before you do any excavation. The pictures below are a result of a guy using a post hole digger with out calling for "locates" and he hit an underground, high-pressure cross country gas pipe. They never did find the guy……….Took out 2 homes.
(This was e-mailed to me today, and I thought I’d share. I never researched to see how this actually happened.)