How Contractors Choose Utility Locating Companies

Every utility locating company's website says the same three things: experienced technicians, advanced equipment, safety first. True or not, none of it tells you who to put on your job. After years of being the second company called to sites where the first locate went wrong, we have opinions about what actually separates locating companies, and most of it never shows up on a website.
Here's what we'd ask if we were hiring one.
Ask what happens when a line won't locate
This is the question that sorts the field. Every company can trace a live electrical circuit with intact tracer wire. The job gets decided on the lines that fight back: poly gas with dead tracer wire, abandoned PVC duct, undocumented private water on a fifty-year-old site.
A good company has a real answer. They escalate methods, they work from surface evidence and records, they bring GPR when EM runs out, and when they still can't verify something, they tell you that instead of painting a guess. A company that never says "low confidence" isn't better at locating. They're better at hoping.
One method is a red flag

If the crew shows up with an EM wand and nothing else, they can only find conductive lines. Plastic pipe, empty conduit, and anything without tracer wire is invisible to them, and on a modern commercial site that's a meaningful share of what's in the ground. The honest minimum is EM and GPR together, used by someone who knows which tool to trust where. Ask what's on the truck. It's a fair question and the answer is revealing.
Marks fade. Ask what you keep.

Paint and flags are gone in weeks. If the deliverable is "we marked it," you own that information for exactly as long as the weather allows.
Ask whether you get documentation: mapped results, KMZ and PDF deliverables, photos of the marks, notes on what was found and what was low-confidence. On projects with design phases, mapping deliverables are the difference between a locate you use once and a record your whole project team works from. We include KMZ, PDF mapping, and reporting because the marks themselves are the least durable thing we produce.
Can they verify, or only mark?
Surface marks are estimates. When your bore crosses a gas line, somebody has to physically expose that pipe and measure it, which is potholing. Companies that only mark will leave you coordinating a second vendor for verification, which in practice means it often doesn't happen. Ask whether they identify which crossings need potholing and whether they can handle or coordinate it. The companies that treat verification as part of the job are the ones thinking about your excavation, not just their scan.
Response time is a capability, not a perk
Construction schedules don't wait politely. A locating company that books two weeks out will cost you more in idle crew time than the locate itself. Ask about mobilization honestly: we offer same-day and next-day in many Texas markets, from Austin to Houston, and when we can't make that window we say so up front, because a crew standing around waiting on marks is the most expensive kind of quiet.
The boring paperwork matters
Insurance certificates, the ability to get badged onto an active site, familiarity with your safety program, techs who can sit through an orientation without drama. None of this is exciting and all of it decides whether the locate happens on the day it's scheduled. A company that handles commercial and industrial work regularly will have this ready before you ask.
What price actually tells you

Cheapest bid usually means fewest methods, fastest walk, no documentation, no verification. The locate is one of the smallest line items on your project and it protects some of the largest risks, so shaving a few hundred dollars here is bad math. That's not an argument for the most expensive company either. It's an argument for scoping: a defined work area, records provided, access arranged, and a quote based on the actual investigation. Vague scope produces padded bids from everyone.
Vetting locating companies for a Texas project? Ask us the hard questions, including what we can't do. Schedule Utility Locate or send the address and scope for review.
The short version
Hire the company that uses more than one method, tells you what it couldn't verify, hands you documentation that outlives the paint, handles or flags potholing, and shows up when your schedule needs them. That's the job we built SiteTwin to do, and it's the standard we'd hold anyone to, including us.
