Quick Verdict
811 call before you dig is the free, legally required step of having underground utilities located and marked before any excavation in Oregon. You place a locate request, the utility operators mark their buried lines with paint and flags, and only then do you dig, carefully, around the marks. It protects people from striking gas, power, water, and communication lines, and it protects you from liability for the damage. Whether you are planting a fence post or excavating a foundation, the rule is the same: contact 811 first, wait for the marks, then dig.
What 811 Actually Is
811 is the national call-before-you-dig phone number, and every state runs a one-call notification center behind it. In Oregon, contacting 811, by phone or online, sends a single notice to all the utility operators who might have lines in your dig area. Each of them then comes out and marks where their buried facilities run, using standardized paint colors and flags.
The point is simple: nobody knows where every buried line is by looking at the surface. A gas main, a fiber trunk, and a power feed can all cross a yard with no sign above ground. The locate process reveals them before a bucket or a shovel finds them the hard way.
How the Locate Process Works
The process follows a predictable sequence, and knowing it helps you plan a project without delays.
- Place the request: Contact 811 before digging, describing the location and scope of work.
- Wait the required time: State rules set a waiting period, usually a couple of business days, before you can dig.
- Lines get marked: Utility operators mark their buried lines with color-coded paint and flags.
- Confirm all responses: Make sure every expected operator has responded before starting.
- Dig carefully around marks: Hand-dig or use safe methods near the marks to expose lines.
The color code is standardized nationwide. Knowing what the colors mean keeps a crew oriented on site.
| Paint color | Utility marked |
|---|---|
| Red | Electric power |
| Yellow | Gas, oil, steam |
| Orange | Communications, cable, fiber |
| Blue | Potable water |
| Green | Sewer and drain |
| White | Proposed excavation |
| Pink | Temporary survey marks |
Digging Safely Around the Marks
A locate tells you a line is there, not its exact depth or precise position. That is why safe digging near marked utilities means slowing down and exposing the line by hand or with soft techniques rather than driving a bucket blindly toward it. This careful exposure is called potholing or daylighting utilities and safe digging, and it is standard practice when a trench or foundation crosses near a marked line.
The tolerance zone around a mark is where machine digging stops and careful work begins. Respecting it is the difference between a routine job and a struck gas line that evacuates a neighborhood.
Who Marks What: Public vs Private Lines
Here is the gap that catches homeowners off guard: 811 only marks the utility company's lines up to their meter or connection point. Anything private -- the lines you or a previous owner installed past the meter -- is not on their map and does not get marked. In Oregon yards that means:
- The gas line from the meter to a shop, pool heater, or fire pit.
- Electrical runs to a detached garage, well pump, or landscape lighting.
- The water service from the meter to the house, plus any irrigation lines.
- A private septic system, drainfield, and its lateral lines.
- A well line or a propane line from a buried tank.
None of those come marked by the 811 locate. On a property with outbuildings, a well, or a septic system, a private locate service using ground-penetrating equipment is worth the cost before you dig. Assuming "811 marked everything" is exactly how people cut their own water or gas line in their own yard.
Where 811 Fits in Oregon Excavation Compliance
811 is one piece of a larger compliance picture. It handles underground utilities, but a project may also need an oregon excavation permit for grading, erosion control, or land use depending on scope and location. A large cut, work near a waterway, or clearing on a slope can trigger county grading permits and state erosion-control requirements. Understanding grading permit requirements alongside 811 keeps a project fully legal, not just utility-safe.
Different agencies own different parts of this. County building departments handle grading and building permits, the state environmental agency handles erosion and stormwater on qualifying sites, and safety rules govern trench work. A contractor who works Oregon regularly knows which apply to your job.
What Happens If You Skip It
Skipping the locate is not a shortcut, it is a gamble with real downside, and Oregon treats it seriously. If you dig without a valid locate and hit a line, you own the consequences:
- You pay for the repair. Cutting a fiber trunk or a gas main means paying the utility's full repair bill, which can dwarf any job's budget.
- You may face penalties. Damaging a facility while out of compliance can bring fines and liability.
- You risk injury or worse. A struck gas or power line is a life-safety event, not just a cost.
- You knock out service. One cut fiber or water line can take out a whole neighborhood's internet, phone, or water.
There is no version of skipping 811 that comes out ahead. The locate is free, the wait is short, and the alternative is a bad day that keeps getting worse.
Why It Matters Beyond the Law
Beyond being required, 811 protects three things at once: lives, service, and money. Striking a gas or power line risks injury or worse. Cutting a fiber or water line can knock out service for a whole area and leave you paying for the repair. And utility strikes create liability that dwarfs the cost of a free locate. There is no version of skipping 811 that pays off. For any Oregon excavation, from a small trench to a full site, it is the first call. The excavation contractor guide covers compliance across the excavation process.
The Bottom Line
811 call before you dig is free, fast, and required, and it is the single most important safety step before any excavation in Oregon. Place the request, wait for the marks, confirm every operator responded, and dig carefully around the tolerance zone. If you are planning excavation and want a crew that handles locates and compliance as a matter of routine, we do this on every job. See our excavation services or request a free estimate.