Line Locating

Line Locating in Rancho Cucamonga, CA

Buried water, sewer, gas, and electrical lines found before you dig.

Accurate line locating that keeps landscaping, paving, and excavation projects safe across the Inland Empire. We use ground-penetrating radar and electromagnetic line detection to find buried utilities on your property. Each line is marked with flags or paint, so you can dig without hitting anything.

Exposed water line uncovered during line locating

Rancho Cucamonga plumbing, done right the first time

Two technicians fitting a new water valve in an open trench

Precise line locating before you dig

Accidental damage to buried utilities can lead to serious problems, from disrupted service to costly repairs. Our line locating service finds the water lines, sewer lines, gas lines, electrical conduits, and other underground utilities on your property before landscaping, paving, or other excavation begins. Our technicians arrive with ground-penetrating radar and electromagnetic line detection, so we can pinpoint buried lines even when no map of the property is available. Once each line is found, its location is marked with flags or paint for easy reference during the dig. The methods are above ground and non-invasive, so your landscaping stays as it is.

We locate lines for residential and commercial properties of all sizes, and it is recommended to schedule a locate any time you plan to dig deeper than 18 inches.

Benefits of professional line locating

Hitting a buried utility is expensive and can be dangerous. Here is why a professional locate is worth it.

  • Safety Damaging an underground gas or electrical line can cause property damage or injury.
  • Avoiding costly repairs Repairing a damaged sewer, water, or gas line is expensive and inconvenient.
  • Compliance Many areas require documented line locating before digging begins.

Lines we locate

We locate the utilities most likely to be in the way of a project, on homes and commercial properties alike.

  • Water lines Buried water pipes found and marked before landscaping, paving, or excavation.
  • Sewer lines Sewer line locating to support repair projects and prevent accidental damage during excavation. See our sewer line repair service.
  • Gas lines Buried gas plumbing found and marked before digging. We also handle gas plumbing work.
  • Electrical conduits Conduits and other subsurface structures detected alongside the plumbing lines.

Our trucks also carry camera inspection gear. Read what a sewer camera inspection actually shows.


How we locate your lines

Our approach blends technology and experience, in this order.

  1. Survey map review When available, we start with plot maps or land surveyor data to identify known underground utilities.
  2. Ground-penetrating radar GPR detects a range of lines, even when no preliminary map is available.
  3. Electromagnetic locating Combined with a visual inspection, this pinpoints specific types of utility lines.
  4. Mark the lines Each located line is marked with flags or paint so your crew can dig with confidence.

Why call us for line locating

We are a family-owned company with over 35 years of combined experience in plumbing and utility locating. Scheduling is flexible to fit your project timeline, pricing is competitive, and we work to finish on time so you can move ahead. As a full-service plumbing company, we can also handle the plumbing work that follows.

Planning a dig? Call (657) 632-8881 or send the form to book your line locating appointment.

New brass ball valve with a white handle on a water line in an open trench
Plumbers working on a main line beside a street
The short answer

Line locating is the process of finding and marking buried water, sewer, gas, and electrical lines before landscaping, paving, or excavation begins. A technician reviews any available survey maps, then scans the ground with ground-penetrating radar and electromagnetic detection and marks each line with flags or paint. It prevents damaged utilities, disrupted service, and costly repairs, and it is recommended any time you plan to dig deeper than 18 inches.

Line locating FAQ

What kinds of lines can you locate?
We locate water lines, sewer lines, gas lines, electrical conduits, and other underground utilities. Ground-penetrating radar and electromagnetic line detection find these lines even when no map of the property is available. Other subsurface structures are detected alongside the plumbing lines. Each line we find is marked so your crew knows where it runs.
Can you locate lines on commercial properties?
Yes, we locate lines on commercial and residential properties of all sizes. The same tools and steps are used on a business site as on a home: map review, radar, electromagnetic locating, and marking. Larger properties with more utilities simply take longer to cover. As a full-service plumbing company, we can also handle the plumbing work that follows.
When should I schedule line locating?
Schedule line locating any time you plan to dig deeper than 18 inches on your property. That includes landscaping, paving, fence posts, and other excavation where a buried line could be in the way. Booking the locate before the dig is planned gives you time to adjust the work around what is found. Scheduling is flexible to fit your project timeline.
Do you need to dig to locate underground utilities?
No, line locating does not typically require digging. Our methods are above ground and non-invasive, using ground-penetrating radar and electromagnetic detection from the surface. That means there is little impact on your lawn, plants, or paving. The only marks left behind are the flags or paint that show where each line runs.
How long does line locating take?
Most line locating projects are finished within a few hours. The time depends on the size of the property, how easy it is to access, and the number of utilities to find. A small yard with one or two lines is quicker than a large site with several. We work to finish on time so your project can move ahead.
How accurate is your line locating?
Our line locating is highly accurate because it combines several methods rather than relying on one. We start with plot maps or land surveyor data when they are available, then use ground-penetrating radar to detect lines. Electromagnetic locating, combined with a visual inspection, pinpoints specific types of utility lines. Each located line is then marked with flags or paint for reference during the dig.
What are the risks of digging without professional line locating?
Digging without professional line locating risks hitting a buried utility, which can cause service interruptions, costly repairs, or safety hazards. Damaging an underground gas or electrical line can cause property damage or injury. Repairing a damaged sewer, water, or gas line is expensive and inconvenient. A locate before you dig is the simplest way to avoid all of these.
Is line locating required by law before excavation?
In many areas, yes: documented line locating is required before major digging begins. The rule exists to prevent damage to buried utilities and the hazards that come with it. Requirements vary by location and by the size of the project. A professional locate gives you marked lines to work from before excavation starts.
Do you offer sewer line locating for repairs?
Yes, we locate sewer lines to support repair projects and prevent accidental damage during excavation. Knowing exactly where the sewer line runs lets a repair crew dig in the right place. It also keeps other buried lines nearby from being hit during the work. Our trucks carry camera inspection gear as well as line-locating equipment.
How do I prepare for my line locating appointment?
Just make sure the area to be located is accessible, and our team handles everything else. Clear access lets the technician scan the ground and mark lines without delays. If you have plot maps or land surveyor data for the property, they help us identify known utilities first. Let us know where you plan to dig so the locate covers the right area.
  24/7 emergency

Water where it shouldn’t be?

Burst pipes, no water, active leaks, and sewer backups are answered day or night.

Schedule service

Book a visit

Send the form and a member of the team will call you back to confirm the details and a time.

Monday7:00 am – 5:00 pm
Tuesday7:00 am – 5:00 pm
Wednesday7:00 am – 5:00 pm
Thursday7:00 am – 5:00 pm
Friday7:00 am – 5:00 pm
Saturday7:00 am – 5:00 pm
Sunday7:00 am – 5:00 pm
Why call us

One crew, one standard

  • C36 licensed & insured
  • 35+ years combined experience
  • Priced up front, before work starts
  • Family owned in Rancho Cucamonga
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