Digging Near Utilities: Marks Are Information, Not Clearance

Know the hazard

Team: Builders. Topic: Underground Services.

Utility paint and flags help identify expected locations, but they do not eliminate uncertainty about depth, route, abandoned lines, or private services. A building crew may encounter electric, gas, communications, water, or sewer lines while digging a small footing or setting a fence. Every excavation needs the required locating process before work begins.

Use the controls

Follow local notification requirements and the site utility plan. Review drawings, owner information, field marks, and limitations; private utilities may require separate locating. Establish the applicable tolerance zone and safe means of determining exact location as excavation approaches. Operators must not assume an unmarked area is empty or scrape with a bucket until a line becomes visible. Use trained personnel and approved exposure methods.

Work within the safe plan

Protect exposed services from damage and coordinate support with the utility owner as required. Stop if marks disappear, an unexpected line appears, or records conflict with field conditions. If contact or a suspected leak occurs, move people away and activate the emergency plan rather than attempting an improvised repair. Today identify the validity and limits of the actual locate ticket and the person who will resolve uncertainty. A small dig can cause the same utility emergency as a large excavation if the crew skips that verification.

Discuss with the crew

A crew finds an unmarked conduit while preparing a post footing.

Question: Should work continue around it?
Answer guidance: Stop affected excavation and identify and protect the service through the approved process.

Question: Do public marks always cover private lines?
Answer guidance: No; confirm the locate scope and arrange private-service locating where needed.

Prepare, act, and follow up

Leader preparation: Bring current utility-location records and excavation plan.

Put it into practice: Review locate limits and emergency contacts.

Supervisor follow-up: Reverify markings after disturbance or expiration.

Official reference: OSHA — Specific Excavation Requirements, 29 CFR 1926.651
https://www.osha.gov/laws-regs/regulations/standardnumber/1926/1926.651

Awareness briefing. Apply current site procedures and applicable requirements. This talk does not replace required qualification, practical training, exposure assessment, medical evaluation, or a written program.

Suggested session: 5-7 minutes, including discussion and activity. Prepared October 18, 2026; recheck current requirements before use.

Show the crew

Review locate limits and emergency contacts.