Call Before You Dig

Dig Safely Before you dig or excavate with mechanized equipment on your property, the law requires you to notify all utilities at least 48 hours in advance so that underground lines can be located and clearly marked. (This excludes the day you call, weekends, and holidays.)

So, before you dig with mechanized equipment, call 8-1-1.   http://www.call811.com  It's toll-free, and it's the law!