Marking and painting utilities correctly isn't optional—it's the foundation of safe excavation. Before you hire a locating service or place a call to 811, you need to ask the right questions to ensure accuracy, compliance, and protection on your jobsite.
What Credentials and Certifications Should I Verify?
Ask your utility locating provider about their locating technician certifications. Most states don't legally require formal certification, but many reputable companies voluntarily hold IFIC (Intercontinental Fertilizer Industry Committee) training or equivalent credentials that demonstrate competency in safe digging practices. You can also ask if they're members of APWA (American Public Works Association) or similar professional organizations.
Request proof of liability insurance—typically $1 million per occurrence minimum—and ask how long they've been in business. Experienced locators have seen complex underground scenarios and know how to handle unusual situations (like multiple lines in tight spaces or conflicting utility marks from previous work).
How Fast Can They Respond to My 811 Ticket?
Response time directly impacts your project timeline. Call 811 or submit your dig ticket online, and ask the dispatcher what the standard response window is in your area—most states require location within 2–4 business days, though some offer expedited or emergency same-day services for an additional fee ($50–$200 extra).
Ask your locating company if they offer rush marking for an additional cost. If you're facing a tight deadline, knowing upfront whether they can turn around a mark within 24 hours matters. Some providers charge $150–$400 extra for emergency or weekend service depending on your location and complexity.
What Paint Colors and Standards Will They Use?
The locating company should follow APWA color codes standardized across North America:
- Red: electrical power lines
- Yellow: gas, oil, steam, or other hazardous materials
- Orange: telecommunications and cable
- Blue: water supply
- Green: sewer and drain lines
- Pink: temporary survey marks
- Purple: reclaimed water and irrigation
- White: proposed excavation area
Ask the locator if they'll paint the entire length of the utility line across your property or only the portion relevant to your project. Full marking protects you if your work expands. Also confirm they'll mark both the line itself and any critical transition points (where utilities change depth, split, or enter/exit structures).
What's Included in Their Service, and What Costs Extra?
Before getting a quote, clarify what the standard marking service covers. Most 811 locates are free if you call the hotline, but the private locating company may charge $75–$200 per locate depending on property size, number of utilities, and complexity.
Ask whether the fee includes:
- Locating all utilities on the ticket or only specific ones
- Painting and flagging (some companies flag with small stakes instead of paint)
- A damage prevention site visit before excavation begins
- Follow-up marks if the original paint fades
- Documentation or a site photo for your records
Clarify any additional charges: if your property has multiple disconnected utility runs, dense underground infrastructure, or difficult terrain, expect the base price to increase by $50–$150.
Can They Provide a Site Verification or Damage Prevention Consultation?
After initial marking, ask if the locating company offers a pre-dig verification visit. A technician walks your excavation route 24 hours before digging, confirms all marks are still visible and accurate, and flags any hazards (like utilities running closer together than expected). This typically costs $100–$250 but prevents costly damage claims.
Also ask if they provide written documentation of marked utilities—a photo or PDF report with GPS coordinates. This protects you legally if a dispute arises and gives your crew a clear reference.
What Happens If a Utility Is Damaged During Excavation?
Ask about their damage liability coverage explicitly. While the locating company isn't responsible if you ignore their marks, they are liable if their mark was inaccurate. Understand what documentation you'll need (photos, damage reports) to file a claim. Response time for damage claims ranges from 24 hours to 5 business days depending on the provider.
When comparing locating and 811 services, platforms like Mercoly let you review multiple providers side-by-side, check their credentials, and read customer feedback about their marking accuracy and response times.
Frequently Asked Questions
Q: Do I have to call 811, or can I just hire a private locating company? Most states legally require you to call 811 before digging, even if you hire a private locator—the hotline notifies all affected utility companies. Private locators supplement 811 by providing faster response times or more detailed marking.
Q: What should I do if I find an unmarked utility during excavation? Stop work immediately, mark the line's location, and contact the utility company directly or call 811 to report it. Never assume an unmarked line is inactive.
Q: How long do painted utility marks stay visible? Typical paint marks fade or wash away within 30 days. If your project extends beyond that, request a re-mark before resuming excavation.
Find and compare trusted utility locating providers in your area to get accurate marking and peace of mind before breaking ground.