 Yeah, definitely. Now, I just used 811 to install electrical service in a detached garage. The old wire had shorts in it, so we wanted to dig a new hole, and we did just that. We called 811. They came out. They marked all the lines around the house, and we were able to easily avoid them. You know, utility lines can be buried just inches below ground, so you really never know. In an unintended shovel dig, it could easily hit a line that can disrupt service. It could result in potentially dangerous and very costly consequences as well.