Coastline Utility provides underground utility locating for homeowners, contractors, and public agencies across the East Bay. Our Contra Costa utility locators identify and mark water pipes, gas pipelines, electric lines, sewer lines, fiber optic cables, and storm drain connections before any digging begins. These utility locating services run on safety first principles, advanced technology, and clear reporting. We serve Concord, Walnut Creek, Richmond, Martinez, Antioch, and surrounding communities. As a team of experts with years of California field experience, we bring precision to your property and peace of mind to your project. Get a free quote now!
Contra Costa’s Underground Network Carries Real Risk
Contra Costa County spans more than 800 square miles of mixed terrain, from the refineries of Richmond and Martinez to the housing tracts of Brentwood and San Ramon. Underneath that footprint runs a dense layer of underground utility lines: gas pipelines, water pipes, sewer lines, and telecommunication cables, added in layers over decades.
A single strike can shut down a job site, trigger PG&E emergency calls, and cost tens of thousands in repairs and fines. California law requires you to contact USA North 811 before any dig, but 811 only marks public utilities. Private lines past your meter are your responsibility, and that gap is where most damage incidents happen.
Underground Utility Locating Services for Every Contra Costa Project
We offer four core utility services across Contra Costa County. Each one works on its own or pairs with the others for a full subsurface picture before excavation.
- Public and Private Utility Locating: We mark public utility mains and run private utility locating across the property, past the meter to the house, garage, pool equipment, and outbuildings. Every underground service line gets a color-coded mark.
- Potholing: Targeted vacuum excavation that exposes a buried utility line at critical dig points. Confirms depth, material, and exact position before earthmoving starts.
- CCTV Sewer Line Inspection: High-resolution camera service that documents pipe condition, identifies blockages, and supports water line repairs and gas line inspection planning.
- Leak Detection: Advanced leak detection technology, including slab leak detection, that finds hidden water loss without tearing up floors or yards.
Advanced Technology That Marks Underground Lines With Precision
Accurate marking underground lines takes more than a single locating device. Coastline pairs ground penetrating radar with electromagnetic locating tools to detect a wider range of materials, including metallic pipes, PVC water pipes, natural gas line networks, fiber optic cables, and hazardous liquid pipelines.
Our utility professionals scan each site twice: once with active signal tracing for conductive utilities, and once with GPR for non-conductive lines and voids. The result is a complete subsurface map for digging projects of every size — backyard pool installs, commercial site development, public utility tie-ins, and utility undergrounding work tied to California Public Utilities Commission programs like PG&E’s Rule 20.
Reasons Contra Costa Contractors and Homeowners Choose Coastline
Coastline serves both sides of the Bay’s underground service market. Contractors get the fast turnaround they need to keep digging projects on schedule. Homeowners get straight answers about what runs beneath their property.
- Local business: A small business that answers the phone, shows up on time, and stands behind every report.
- Safety first culture: Public safety, worker safety, and property protection sit at the front of every job.
- Advanced technology with experienced utility professionals: New equipment in the hands of trained locators, not a contractor with a single wand.
- Clear reporting: Color-coded marks, photo documentation, and depth notes that hold up for permitting and insurance.
- Records that protect property value: Locating reports and CCTV footage carry weight with buyers, insurers, and home inspectors.
Our Locating Process From First Call to Final Marks
Our process keeps you informed at every step and ends with safe digging marks you can build against.
- Free Quote and Scope Review: You describe the project, we ask the questions that affect price and timing, and you receive a flat quote.
- Site Walk: A Coastline locator meets you on site to identify dig zones, structures, and known utility entry points.
- Scan and Mark: We run electromagnetic tracing and ground penetrating radar across the dig area, then paint and flag every underground utility line using the standard color code.
- Report and Handoff: You receive a written report with depths, photos, and notes, ready for your excavator, your permit office, or your insurance file.
Coastline Utility Inc. Serving Across Contra Costa County
Our Contra Costa coverage runs from the I-80 corridor through Central County and out to East County. We serve residential, commercial, and public-sector clients across the region. Our infrastructure solutions support projects from single-lot home builds to multi-acre site developments.
Cities and communities we serve:
- Concord, Walnut Creek, Pleasant Hill, Martinez
- Richmond, El Cerrito, Hercules, Pinole
- Antioch, Pittsburg, Brentwood, Oakley
- San Ramon, Danville, Lafayette, Orinda
Not sure if your project falls inside our service area? Call us, and we’ll confirm in one phone call.
Contact Coastline Utility and Get a Quote
A short call locks in your dig date with confidence. Tell us what you’re building, when you break ground, and where the site sits. We’ll send a flat quote and a scheduled scan date within one business day. Request a free quote today!
Frequently Asked Questions About Contra Costa Underground Utility Locating
Does calling 811 cover everything on my Contra Costa property?
No. USA North 811 only marks public utilities up to your meter or service drop. Private lines past that point — from the meter to your house, pool, or shed — are your responsibility. Coastline runs private utility locating to close that gap before you dig.
How fast can Coastline get out for Contra Costa underground utility locating?
Most residential and small commercial jobs in Contra Costa schedule within 3 to 5 business days. Schedule-critical jobs can often move up. Call (669) 371-0822 with your project date and we’ll work backward from your dig day.
What can ground penetrating radar find that 811 markings cannot?
Ground penetrating radar detects non-conductive lines that electromagnetic tools miss, including PVC water pipes, fiber optic cables, clay sewer lines, and buried tanks. GPR also finds voids and disturbed soil that may signal old, undocumented utility work on the property.
Do you handle CCTV inspections for storm drain and sewer lines?
Yes. We run high-resolution camera service through storm drain, sewer line, and lateral plumbing systems. The footage documents cracks, root intrusion, and blockages, which supports water line repairs, pre-purchase inspections, and city permit submittals.
Is utility locating worth the cost for a small homeowner dig?
Yes, almost every time. A single strike on a gas line, sewer line, or fiber bundle can cost thousands in repairs and fines, plus property damage and downtime. The cost of a locate is a small fraction of that, and the report adds property value at resale.