Install of orange cable happened 7 business days ago, and the person who was going to bury the line came a few days after that. However, he couldn't bury the line because the underground utility/sprinkler lines hadn't been tagged yet. Do I need to get those lines tagged? Or will Xfinity handle that?
That would usually be up to the home owner especially for underground sprinkler system. You could call Utility for locating their cables.