Call 811 Before You Dig One Post Hole

You know what the cheapest phone call you’ll ever make is? 811. Free, actually. And it might save you from blowing your house up, electrocuting yourself, or handing the state of Pennsylvania a fistful of your money in fines.

I don’t care if you’re planting a shrub. I don’t care if it’s “just a fence post.” I don’t care if your neighbor swears he’s had a mental map of every line under his yard since 1978. Call. 811. Before. You. Dig.

This isn’t a suggestion. In Pennsylvania it’s the law. It’s called Act 287, the Pennsylvania One Call Act, and it applies to homeowners just as much as it applies to contractors.

What 811 actually does

811 is a free national number that connects you to Pennsylvania One Call. You tell them where you’re digging. They tell every utility company in the area — gas, electric, water, sewer, cable, fiber — and each one sends somebody out to spray-paint or flag where their lines run under your property.

You don’t call the gas company. You don’t call PECO. You don’t call Verizon. One call, one ticket number, everybody gets notified. That’s the whole point.

You can call 811 or file it online at paonecall.org. The online form takes about ten minutes.

The timeline you actually have to follow

In PA, you need to notify at least three business days before you dig. Not three days. Three business days. That means calling Friday afternoon so you can dig Saturday morning doesn’t work. Saturday, Sunday, and holidays don’t count.

Marks are good for ten business days from the start date of your ticket. If your project stretches longer, or you go back to finish it three weekends later, you renew the ticket. Faded marks or old marks don’t protect you. Rain and lawnmowers eat paint fast — if you can’t see it clearly, re-request.

What the paint means

Every color is a specific utility. Learn these once — they’re the same nationwide:

  • Red — electric
  • Yellow — gas, oil, petroleum
  • Orange — cable, phone, fiber
  • Blue — drinking water
  • Green — sewer and storm drains
  • Purple — reclaimed water or irrigation
  • White — where you marked your proposed dig site
  • Pink — temporary survey markings

If you see yellow paint or a yellow flag near where your post hole is going, back off. That’s gas. You’re not “just going to be careful.” You’re moving the hole.

What happens if you hit something

Best case: you nick a cable line and you owe Comcast a few hundred bucks and your whole street is offline for a day. That’s the best case.

Worst case? You put a shovel through a two-inch gas main and you’re on the news.

Hitting a gas line means immediate evacuation, road closure, PGW or the local utility rolling out an emergency crew, and — if you didn’t call 811 first — a bill you cannot believe. Repair costs on a main can run five figures fast. Electric lines are worse. Direct-buried primary can push 7,200 volts. It doesn’t care that you’re wearing work gloves.

Then comes the legal side. Under Act 287, if you dug without calling, you’re on the hook for all repair costs, damages to third parties who lost service, and you can be fined by the PA Public Utility Commission on top of that. Homeowners are not exempt. I watched a guy in the Northeast try to install a basketball hoop in his front yard, hit a service line with a hand auger, and end up staring down a bill north of eight grand before his insurance would even take the call. He thought “it’s my own yard, my own problem.” It isn’t. The lines don’t belong to you and neither does the liability.

The tolerance zone — where the shovel stops and the hand starts

Here’s the part people miss. Even after everything is marked, PA law says you cannot use mechanical equipment within 18 inches on either side of the marked line. That’s the tolerance zone. Inside that zone, you hand-dig. Shovel, post-hole digger by hand, careful. No auger, no skid steer, no mini-ex.

The marks are a rough location, not GPS. Utilities move, they sag, they get installed by whoever ran the crew thirty years ago on a Friday afternoon. Assume the line could be a foot off in any direction and dig accordingly.

Also worth knowing: if you find something that isn’t marked — old lead pipe, an unlabeled conduit, anything weird — stop. Don’t yank it, don’t cut it, don’t “see what it goes to.” Call the utility. Half the stuff under an old Philly rowhouse block predates the paperwork.

Three things to actually remember

  1. Three business days ahead. Every time. Weekend project? Call Tuesday.
  2. Marks aren’t precise. Hand-dig inside 18 inches. That’s the law and it’s also common sense.
  3. The liability is yours if you skip the call. Homeowner or not, the fines and the repair bill land on you.

Bottom line

Free call. Three business days. Zero excuses.

Fence? Call 811. Deck footings? Call 811. Mailbox post? Call 811. Digging out a stump with a rented backhoe? Call 811 twice and hand-dig once you’re near the flags.

The one call you skip is going to be the one where you find out what was under there. Don’t be that guy.