Hi. I'd like to pour a simple 3' x 8' concrete slab (4" thick) as a walkout
from my basement's sliding door. Since I don't really need to dig very deep
into the soil for this, I'm wondering if I still need to have my local
utility companies come out and mark the location of underground cables. For
that matter, if there are buried cables right under this area, is it even a
good idea to put a slab on top? Or should I put something more "temporary"
(bricks on sand, patio blocks, etc.) that I can remove easily if needed?
Thanks for the help.
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".
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.
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.
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