I think its great you are thinking ahead with the utilities and going out of your way to mark and remark them. My only utility I was really concerned about was the TV/Internet line as it was the one closest to where the pool was going, and even though it shouldn't be a concern, talked at length with everyone about where it was, and kept re-marking it as dirt was moving. During the COVID shutdown around here, I had three kids remote learning, a teacher remote teaching, and me working from home, that's a life line!
But sure enough, that is the one line they cut just about the last dig into the ground they needed to do. I think of my PB as a pretty careful guy, was super attentive about safety, lot lines, house, utility, but in the end, it took just one guy not paying attention to put a shovel into the ground and split that cable in half.
Luckily, they were able to splice the cable for a temporary fix and Comcast was able to come out the next day and run a new line. My PB ran a new trench and buried it, but it was still a pain and should have been avoided. Like I said, great to be over attentive to small things like this.
