A large surface project is happening, such as adding a thick layer of topsoil, pouring a concrete slab, or installing deep hardscaping.
Private utility access covers. This includes water meter boxes, private gas shutoffs, underground electrical pull boxes, or communications vaults.
Public 811 marks public utilities up to the meter, but not private lines. Look for small plastic or metal rectangles flush with the dirt near the street or house.
Overgrown grass and a thin layer of dirt can easily disguise a critical water shutoff valve. If it looks like plain yard, it might not be.
In an emergency (like a burst pipe or electrical issue), first responders or plumbers need immediate access to these shutoffs. Digging through concrete or removing heavy pavers to find them is dangerous and expensive.
If you know a line runs through the area but cannot find the access box, do not proceed. Hire a private utility locator to mark the area.
Contact a Private Utility Locator before you cover.
Call 877-735-2796 to connect with local specialists