Utility Potholing in Ventura County, CA

Midtown Plumbing Company provides utility potholing across Ventura County with an in-house hydrovac trailer. We vacuum a small test hole over each marked line and show you the exact depth, size, and material before your excavator, auger, or drill goes in. 

Paint marks in this county sit on top of 100 years of oil, farm, and city pipe, and the records miss plenty. We hold CSLB license #1126558 and bring 15 years of underground plumbing experience. Call (805) 765-3995 to schedule potholes.

What Potholing Tells You and Paint Marks Don't

A DigAlert mark gives you an approximate horizontal position. No depth. No pipe size. No word on whether the line under the paint is the only one there. Locators read a signal from the surface, and signals drift near other metal, rebar, and wet clay.

A pothole replaces the estimate with a measurement. We cut a hole 8 to 12 inches wide with pressurized water, vacuum the spoils into the trailer tank, and put eyes on the utility. You get depth to top of pipe, diameter, material, and direction of run. Engineers call this Quality Level A under the ASCE 38 standard, the highest grade of subsurface utility data. Crews call the same thing daylighting.

The Common Ground Alliance tracks utility damage nationwide. Failure to pothole lands among the top root causes in the annual DIRT report, year after year. Every one of those strikes happened on a job where someone trusted the paint.

California Law Requires Potholing in the Tolerance Zone

California Government Code 4216 sets the rules for every excavation in the state, from a fence post to a sewer main.

  • Outline your dig area in white paint and contact 811 DigAlert at least two working days before you start. The day you call does not count.
  • Your ticket stays valid for 28 days. Renew before the ticket expires if work continues.
  • The tolerance zone runs 24 inches on each side of a marked line. Inside the zone, you expose the utility with hand tools or vacuum excavation before any power equipment digs.
  • The California Underground Facilities Safe Excavation Board investigates strikes. Fines reach $10,000 for negligent violations and $50,000 for knowing and willful ones, plus the repair bill from the utility.

Hand digging satisfies the law. In August adobe clay, hand digging one pothole takes a laborer an hour or more. The hydrovac finishes the same hole in a fraction of the time, with no shovel blade near a gas line.

What the Paint Colors Mean

Color

Utility

Common owners in Ventura County

Red

Electric power and lighting

Southern California Edison

Yellow

Gas, oil, and petroleum

SoCalGas, oil pipeline operators

Orange

Phone, cable, and fiber

AT&T, Spectrum, Frontier

Blue

Drinking water

Ventura Water, City of Oxnard, Casitas Municipal Water District

Purple

Recycled water and irrigation

City and district recycled water systems

Green

Sewer and storm drain

City public works departments

White

Your proposed excavation

You

Private Lines Nobody Marks

DigAlert members mark what they own. Their responsibility stops at the meter or the property line. Everything past this point belongs to the property owner, and no utility will send a locator for free.
On a commercial site or HOA, private lines outnumber public ones. 

Fire service mains, domestic water loops, customer-side gas to each building, sewer laterals, parking lot lighting, irrigation mains, and storm drains all sit unmarked. As a plumbing contractor, we work on these lines every week. We know where builders ran them in each era of construction, and we trace sewer laterals from the surface with a camera and transmitter before we pothole. Gas line locating, water line locating, and sewer line locating all end the same way: a verified hole over the pipe.

Who Hires Us for Potholing Services

  • General contractors clearing footings, grade beams, and utility tie-ins before excavation starts.
  • Directional drilling crews verifying every crossing along a bore path. We pothole our own pneumatic boring and pipe splitting jobs the same way.
  • Fiber and telecom installers working in crowded parkways and sidewalks.
  • EV charger and solar installers trenching conduit across parking lots full of unmarked lighting and irrigation.
  • Fence, sign, and shade structure companies setting posts and piers.
  • Geotechnical and environmental drillers clearing borehole locations to 5 feet or more before the rig sets up.
  • Civil engineers and surveyors collecting utility depths for design drawings.
  • HOAs and property managers mapping private water, gas, and sewer before a repaving or re-landscaping project.
  • Pool builders and landscapers digging in older backyards.

Where Ventura County Dirt Surprises Excavators

Start with the age of the property. Sites developed before 1970 tend to carry clay sewer lines, galvanized water services, thin records, and abandoned lines nobody removed. Newer sites have better drawings and more utilities packed into each trench. Then look at the neighborhood.

Our Potholing Process

  • You send plans or a site sketch with the dig area, and we quote the number of potholes.
  • We work under your DigAlert ticket or file our own, and wait for every member utility to respond.
  • We walk the site, read the marks, and trace private water, gas, and sewer lines the ticket does not cover.
  • We cut pavement where needed, then open each test hole with the hydrovac and expose the utility.
  • We record depth to top of pipe, size, material, and direction, photograph each hole with a tape in frame, and paint the data on the surface.
  • We backfill and compact, patch asphalt or concrete, and send you a pothole log the same day.

Schedule Potholing in Ventura County

Send us your plans, your ticket number, and your start date. We will pothole every crossing and hand you a log your operator trusts. Found a damaged water, gas, or sewer line in the hole? Our plumbers fix the pipe on the spot. See our full hydro excavation services for trenching, bore pits, and line repairs.

Utility Potholing Pricing in Ventura County

Our rates are simple, and you get a written quote before we mobilize.
  • $300 per hour, with a 2-hour minimum.
  • $1,200 half-day rate, for up to 4 hours on site.
  • Mobilization within Ventura and Oxnard is included. Outside those two cities, we quote any added mobilization up front.
  • No disposal charge when you provide an approved spot on site for the spoils.
  • Off-site disposal of clean spoils starts at $225 per load, with disposal and travel time billed separately.

Contractors, GCs, and repeat customers: preferred trade partner pricing is available. Call (805) 765-3995 and we will talk through your job and your rates.

Four factors set the hours on site:

  • Hole count and spacing. Twelve potholes on one block take fewer hours than three potholes across three sites.
  • Depth. A 3-foot gas service goes faster than an 8-foot sewer main.
  • Surface. Dirt and turf need no restoration. Asphalt and concrete need a cut and a patch.
  • Location. Work in a public street needs a city encroachment permit and traffic control.

Compare the quote against one utility strike. A damaged gas service means an evacuated site, a utility repair invoice, a possible state fine, and days of lost schedule.

Frequently Asked Questions

What is utility potholing?

Utility potholing means digging a small test hole to expose a buried line and confirm the exact position and depth. Most contractors now pothole with vacuum excavation because water and suction do not damage the pipe. The terms potholing, daylighting, and test holing describe the same task.

We charge $300 per hour with a 2-hour minimum, or $1,200 for a half day of up to 4 hours on site. Mobilization within Ventura and Oxnard is included. Contractors and repeat customers get trade partner pricing by phone at (805) 765-3995.

Locating reads a signal from the surface and paints an estimate. Potholing opens the ground and measures the real thing. Locating tells you where to pothole. Potholing tells you where to dig.

Most utilities in Ventura County sit between 18 inches and 6 feet deep. Sewer mains and some water transmission lines run deeper. Tell us the expected depth when you call, and we will confirm the trailer setup for your job.

Yes. We cut a small opening in the asphalt or concrete, pothole through the opening, backfill, and patch the surface. Street work requires an encroachment permit from the city or county, and we handle the plumbing permit side of any repair.

Midtown Plumbing Company runs a hydrovac trailer from 3800 Market St in Ventura and potholes in Ventura, Oxnard, Camarillo, Thousand Oaks, Simi Valley, Moorpark, Santa Paula, Fillmore, Ojai, and Carpinteria. Call (805) 765-3995 for a quote.

Call Midtown Plumbing Company at (805) 765-3995

3800 Market St B, Ventura, CA 93003

California Contractor License #1126558. Licensed, bonded, and insured.

Related services: Hydro Excavation | Underground Utility Repair and Boring | Trenchless Water Line Replacement | Sewer Line Repair and Replacement

Service areas: Ventura | Midtown Ventura | Oxnard | Camarillo | Ojai | Santa Paula | Fillmore | Thousand Oaks | Simi Valley | Moorpark | Carpinteria