Calling 811 Before Installing: What the Utility Marks Mean

Request utility markings before a dog fence installation. Check your state's notice period, responses, private-line limits, and safe digging requirements.

Dog Fence Guide TeamUpdated October 13, 2026Follow your state's notice period; active planning time varies

Contact 811 before digging the dog fence route. The free national service connects you with the state process for requesting approximate buried-utility locations. Even a shallow trench can reach a line.

Start with your state's requirements#

Use the state-center directory for current notice periods, ticket instructions, and local rules. Do not use a general article as a substitute for those requirements. Pennsylvania owners can also read Pennsylvania 811's homeowner FAQs.

Give the complete proposed route#

Prepare the property address, nearest cross street, project description, planned start, and excavation area. For a dog fence, include the boundary loop, the transmitter-to-loop run, crossings, and other ground disturbance. A sketch from the fence planner helps describe the work.

Follow the center's pre-marking instructions. The Tennessee 811 color-code reference identifies white as proposed excavation; utility marks use different colors.

Utility marks are approximate, and private lines need checking. Request the complete excavation area through 811. Follow the actual state notice period, confirm all required utility responses, preserve the marks, and use the required safe-excavation and tolerance-zone procedures. Red identifies electric, yellow gas, orange communications and blue water. A ticket or visible paint alone does not establish readiness or clearance. Confirm which facilities are covered and arrange private locating where needed, including irrigation, propane, outbuilding power and old fence wire.

Confirm responses before starting#

The 811 homeowner process requires notification, waiting, confirming responses, respecting marks, and careful digging. Use the response method your center provides. If a facility is visibly present but has no corresponding marks or response, ask the center to resolve it before work.

A submitted request alone does not establish that the site is ready to excavate. Preserve the ticket and marking records, and follow the actual requirements throughout the project.

Protect lines and respect the tolerance zone#

Marks show approximate locations. The 811 professional guidance explains tolerance zones and exposing facilities with suitable methods before working nearby. Confirm the zone and permitted methods for your state; do not assume a universal clearance or that hand digging cannot damage a line.

Plan crossings before installing wire. See driveway and sidewalk crossings, but resolve utility clearance separately from the wire-installation method.

Arrange for private facilities#

Member utilities' markings may not cover owner-installed facilities. Tennessee 811's homeowner guidance gives examples including irrigation and some private water, sewer, or outbuilding services. Ownership and marking coverage vary. Ask your local center or utility which lines are included, and arrange a qualified private locate for uncovered facilities. Obtain a local quote rather than assume a nationwide price.

If marks disappear or work is delayed#

Follow the request's expiration and re-marking instructions. Renew when required if work runs beyond the validity period or marks cannot be maintained. A ticket is a project record, not a blanket guarantee of safe digging or freedom from liability.

Damage and emergency response#

Stop work if a line is damaged or a suspected hazard appears. Keep people and pets away. For a suspected gas leak, leave the area and call 911 from safety; for electrical hazards, stay clear and follow emergency responders' instructions. PG&E's emergency guidance describes these hazards.

Damage also brings repair costs. PG&E's safe-digging page gives an approximately $3,500 repair-cost example. It is that utility's published example, not a nationwide gas-line average or a quote for your property.

Continue to the complete installation guide once the locating and safety requirements are satisfied.

Sources and equipment references

Use the instructions for your exact equipment. Manufacturer specifications describe particular models; studies apply to the populations and methods they report. Our catalog is a commercial source owned by the same business that operates this guide.

We are not affiliated with, sponsored by, or endorsed by the third-party fence brands discussed in this guide. Their names identify companies, products and source documentation. References do not indicate that those companies reviewed our content or endorse our business. All trademarks belong to their respective owners. DOG FENCE PRO and DogFenceGear.com are part of our own business.

Frequently Asked Questions

Should I contact 811 for a shallow dog fence trench?

Yes. Contact your state 811 center before digging, even for a shallow route. Shallow digging can still reach utilities; confirm the local requirements directly.

How long do I wait, and how long do markings last?

Waiting periods and request expiration vary by state. Follow your center's instructions, confirm responses, and request a re-mark when marks are lost or the request expires.

Do markings establish utility depth?

No. Markings show approximate locations. Do not assume a line is safely below your trench; follow the local clearance and excavation requirements.

Does an 811 request cover every private line?

Do not assume it does. Ask about coverage and arrange locating for privately owned facilities, such as irrigation or power to an outbuilding, when needed.

Calling 811 Before Installing: What the Utility Marks Mean

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