Do I need to call Miss Utility for small slab?

What would it hurt to call them out? It's free and you will not have to worry about possibly cutting something.

Calling them is pretty cheap insurance.

I have seen phone cables just covered over in a yard. Do not concern your self about the concrete. The utilities where I live will avoid it or go under it. If replacement becomes an issue.

Yeah, you're right, and I do plan to call them out. I guess I should've asked this question differently: what I'm really wondering is if I can still throw a 4" slab on top of buried cables at all. I mean, if I don't have to dig down deep enough to disturb the cables, can I still pour concrete on top? The cables would be undisturbed.

But of course they'd now be buried under a 4" concrete slab...

Fr@nk

Sure. but there is probably nothing under there anyway. If you don't see anything coming into the house in that area you are probably safe. Right at the door is a dumb place for anything to be routed, but you never know. In most areas, 12" is the minimum to trench and you are only going 4".

I doubt you will ever need to get to the cables. Its not like there's a junction box down there. The only thing I can imagine is a problem with a water or sewer line.

If there is any problem a new line will probably be run and it will just be run around the slab.