First time hearing about it. Do you have to call them every time you dig a hole?
Discussion
Don’t have to but you want to. Essential for construction/fence/landscape/etc
Private companies might do it better if they just had to publish maps for customers. I imagine only now could that be cost effective.
Not really necessary of you're only digging a foot or so. But if you have to dig any deeper or in a big area, you definitely should. The price of hitting a gas line is very very high...