Florida Public Utilities states that you MUST call 811 before you dig (no matter how small the digging project) to avoid hitting underground utility lines—which are shallower than you may think. It's always a good idea to contact Call Before You Dig (call 811) about a week in advance to get underground utility lines marked before stump grinding, tree removal, or large pruning jobs. FPU will come and mark your lines (at no charge to you) within a few business days after you contact them.  If you have any underground sprinklers, drain lines, invisible fences, septic fields, or underground cables, those should also be marked or mapped. Unless the underground lines and structures are adequately and accurately marked or mapped, and that information is presented to our crew before work starts, we can't be responsible for any damage caused during performance of the work.