811 Call-Before-You-Dig: What Homeowners Need to Know Before Any Excavation
If you're planning any kind of digging on your Riverside County property — a new fence post, a drainage trench, a full excavation project — there's one step that comes before any of it: calling 811. It's free, it's required by law, and skipping it is one of the fastest ways to turn a simple project into an expensive, dangerous mess.
Here's what 811 actually is, why it matters, and what to expect from the process.
What Is 811?
811 is the national "call before you dig" phone number, established so that anyone planning excavation work can have underground utility lines marked before digging starts. When you call 811 (or submit a request online through California's Underground Service Alert), the request gets routed to every utility company with lines in your area — gas, electric, water, sewer, cable, fiber. Each company then sends someone out to mark the approximate location of their buried lines with flags or spray paint, usually within a couple of business days.
This applies whether you're a homeowner installing a mailbox post or a contractor excavating for a full foundation. There's no project too small to call in.
Why This Matters More Than People Think
Hitting a buried line isn't just an inconvenience — it can be genuinely dangerous and expensive.
- Gas lines: A struck gas line can cause a leak or explosion risk, and evacuation of the area is common until it's repaired.
- Electric lines: Underground electrical damage can cause outages, fires, or serious injury to whoever's operating the equipment.
- Water and sewer lines: Less immediately dangerous, but repair costs and water damage can run into the thousands, and you may be on the hook for utility company repair costs if the strike was your responsibility.
- Fiber and cable lines: Increasingly common to hit as more underground fiber gets installed, and repairs aren't cheap.
California law (Government Code Section 4216) requires excavators to notify Underground Service Alert at least two working days before digging. Skipping this step isn't just risky — it can expose you to liability if something goes wrong.
What Homeowners Need to Know Before Calling
You don't need to be a contractor to call. Homeowners doing their own digging — even for smaller projects — are required to call 811 just like professional excavators.
Marking is free. There's no charge for utility companies to come mark their lines. It's paid for by the utilities themselves as part of standard safety practice.
It only covers utility-owned lines. 811 marks utility company lines up to your meter or service connection point. It does not mark private lines on your property — irrigation systems, private drainage, or lines you or a previous owner installed yourself. If you have any of those, you'll need to identify them separately or have your excavation contractor do a private locate.
Marks are approximate, not exact. The paint and flags show a general corridor where a line runs, not the exact depth or precise path. That's part of why professional excavation crews still dig carefully and by hand near marked areas, even after utilities are marked.
Marks expire. If your project gets delayed, marks are typically only valid for about 28 days in California before they need to be refreshed with a new request.
What Happens If You Skip It
If you dig without calling 811 and hit a line, you can be held financially responsible for the utility company's repair costs, on top of any damage to your own property. In more serious cases involving gas or electric lines, there can be safety violations and fines involved as well. It's a five-minute phone call or online form that eliminates a real financial and safety risk.
How We Handle This on Every Project
Whenever we take on an excavation, trenching, grading, or septic project in Riverside County, calling 811 and getting utilities marked is one of the first things we do — before any equipment touches the ground. We also flag any areas where private lines might be present so we can plan around them carefully. It's part of how we keep projects safe and avoid costly surprises for our clients.
Frequently Asked Questions
How long does it take to get utilities marked after calling 811?
In California, utility companies generally have two working days to respond to a locate request and mark their lines before digging can legally begin.
Does 811 cost anything?
No. Calling 811 and having utility lines marked is a free service, funded by the utility companies themselves.
Do I need to call 811 for small projects like a fence post or mailbox?
Yes. Any excavation, no matter how small, technically requires a locate request. Shallow digging can still hit utility lines that aren't buried as deep as people expect.
What if I already know where my utility lines are?
Even if you think you know, lines can shift, be mismarked from original installation, or run in unexpected paths. It's always worth confirming through 811 rather than guessing.
Will 811 mark private lines like my sprinkler system?
No. 811 only marks utility-owned lines up to your meter or connection point. Private lines on your property, like irrigation or previously installed drainage, aren't covered and need to be identified separately.
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