Do I Need to Call 811 Before Digging in Arizona?
Yes. Arizona law requires you to call 811 — Arizona 811, still known around here as Blue Stake — before any digging, and that includes homeowners planting a tree or setting a fence post. You file a ticket, wait two full working days for the utilities to come mark their lines, and only then dig. It is free, and hitting an unmarked gas line because you skipped it is on you.
We file these every single week at Phoenix Pro Excavating. It is not paperwork we resent. It is the reason we have moved over 150,000 tons of dirt without putting a bucket through a gas main.
How the 811 process actually works in Arizona
The process is simpler than most people expect:
• File the ticket, either by calling 811 or online through Arizona 811. You describe the dig area and the work.
• Mark your dig area in white paint or white flags first. This is required in Arizona, and locators will not guess for you.
• Wait two full working days, not counting the day you filed, weekends or holidays.
• Each utility either marks its lines by color or responds that it has no facilities in the area.
• Dig, respecting the tolerance zone around every mark — hand dig or use vacuum excavation within that zone rather than machine digging.
The color code is worth learning: red is electric, yellow is gas, orange is communications, blue is potable water, green is sewer, purple is reclaimed water, and white is the area you marked yourself. Tickets also expire — in Arizona one is generally good for about 15 working days, so long projects need renewals, and so do jobs where weather or traffic scrubs the marks off.
What Blue Stake does not cover — and why this trips people up
This is the part that causes most of the damage we get called to fix. Arizona 811 marks the utility-owned lines. It does not mark anything private on your side of the meter.
That means these are typically not marked:
• The gas line running from your meter to a pool heater, fire pit or BBQ stub.
• Electric feeding a detached garage, well, RV pad, casita or landscape lighting.
• Irrigation and sprinkler mainlines.
• Private septic and sewer laterals.
• Pool plumbing and equipment runs.
So a homeowner does everything right, gets the ticket, sees no marks in the back yard, digs for a tree, and puts a shovel through the gas line to their own pool heater. The system worked exactly as designed. That line was never Blue Stake's to mark.
That is where private locating and hydrovac excavation come in. When we are working anywhere near unknown private utilities, we pothole with vacuum excavation to physically expose the line before a machine ever goes in the ground. Water and suction cannot cut a conduit. A steel bucket can. If you have not read what hydrovac excavation is and when you need it, that covers how the potholing itself works.
A real example from a Goodyear back yard
We were brought into a Goodyear job last year after a landscape crew had already started. The homeowner was putting in a large shade tree near the back fence. The crew had a valid 811 ticket and the yard had no marks in it, so they went at it with a mini excavator.
About three feet down they caught a two-inch electrical conduit feeding a detached workshop the previous owner had built. No permit on file, no as-built, and it was private, so 811 never touched it. Power out to the workshop, an exposed live conductor in an open hole, and a job stopped cold.
We came in with the hydrovac, exposed the conduit cleanly on both sides of the damage so the electrician had a safe hole to work in, then potholed the rest of the planned tree locations before anybody dug again. Found a second surprise while we were at it — an old irrigation main running diagonally across the yard. Nobody got hurt, which is the only part that actually matters, but it turned a one-day tree planting into a week.
The honest counterpoint: 811 marks are not a guarantee
We will not tell you a ticket makes you safe. It makes you legal and a lot safer, which is not the same thing. Locate marks have a tolerance zone for a reason: lines shift over decades, records are wrong, and depths vary. We have found gas a foot off the mark and water at half the depth anybody expected. That is why the rule inside the tolerance zone is hand digging or vacuum excavation, not a machine.
The other honest note: waiting two working days is genuinely inconvenient, and we understand the temptation on a small job. But caliche makes that worse, not better. When you are fighting hard ground you lean on the machine, and leaning on it is exactly how a bucket goes through something. Our caliche work is the reason we are more careful about locating, not less.
Call Phoenix Pro Excavating before you dig
If you are asking whether you need to call 811 before digging in Arizona, the answer is yes, always, and file it two working days out. If your project involves anything private — pool lines, a casita feed, irrigation, a septic lateral — get those located separately before a machine touches the ground.
Phoenix Pro Excavating has over 10 years in the Valley and more than 150,000 tons of dirt moved. We run mini and full-size excavators, hydrovac trucks, and rock hammers, and we specialize in caliche and hard digs across Phoenix and the West Valley. We handle utility trenching and vacuum excavation, and we get estimates back within 24 hours. Call 623-299-2172.
FAQ
Do homeowners really have to call 811 for a small hole?
Yes. Arizona law does not carve out an exception for small residential digging. Planting a tree, setting a fence post, installing a mailbox — all of it requires a ticket. It is free and it takes a few minutes online.
How long do I have to wait after calling 811 in Arizona?
Two full working days, not counting the day you file. Weekends and holidays do not count. Tickets are generally good for about 15 working days after that, so long projects need renewals.
What happens if I hit a line?
Stop immediately and get people away from the area. For a gas line, evacuate, call 911 from a distance, and do not start any vehicle or engine nearby. Then notify the utility. If you dug without a valid ticket you can be held responsible for repair costs and any resulting damage, which is a far worse outcome than a two-day wait.
