What Should I Do Before a Water-Line or Sewer Excavation?
Before any excavation for a water line or sewer line repair, there are critical steps to take — 811, permits, and preparation.
Before any excavation for a water-line or sewer-line repair in the Knoxville area, you should: (1) Call 811 to have underground utilities marked — this is required by Tennessee law. (2) Verify whether the repair is on the homeowner side or the utility side of the meter. (3) Confirm whether a permit is required with the applicable local authority (City of Knoxville or Knox County). (4) Hire a licensed plumber experienced in excavation work. (5) Ensure the work area is safe — no entering unsafe trenches or flooded areas. A professional plumber will typically coordinate 811 and permits as part of the project.
Why This Matters
Excavation is major work. It involves heavy equipment, deep trenches, underground utilities, and safety risks. Proper preparation prevents utility damage, injuries, code violations, and costly mistakes. Skipping steps — like not calling 811 or not getting a permit — can lead to fines, project delays, and dangerous situations.
How It Generally Works in the Knoxville Area
Step 1 — Call 811: Before any excavation, call 811 or submit a request through the Tennessee 811 website. Utility operators will mark the approximate location of their underground lines within a few business days. This is free and required by law. Step 2 — Verify responsibility: Confirm whether the repair is on the homeowner side or the utility side of the meter. If it is on the utility side, contact KUB — you may not need to excavate at all. If it is on your side, proceed with planning. Step 3 — Confirm permit requirements: Contact the applicable permitting authority (City of Knoxville or Knox County) to determine whether a permit is required for the excavation and repair. A licensed plumber typically handles this as part of the job. Step 4 — Hire a licensed plumber: Excavation for water and sewer lines requires professional equipment, code-compliant installation, and proper backfilling. A licensed plumber experienced in excavation work will coordinate 811, permits, inspection, and the repair itself. Step 5 — Ensure safety: Do not enter trenches deeper than 5 feet without proper shoring or trench boxes. Do not enter flooded excavation areas. Keep children and pets away from the work area. A professional plumber will follow OSHA excavation safety standards.
What the Homeowner Can Check
- Has 811 been called and have utility lines been marked?
- Has the responsibility boundary (homeowner vs. utility) been verified?
- Has the applicable permit requirement been confirmed?
- Is the plumber licensed and experienced in excavation work?
- Is the work area safe and accessible for equipment?
Who to Contact
A Licensed Plumber
A plumber experienced in excavation will coordinate 811, permits, and the repair.
Learn moreCity of Knoxville — Permits
Verify whether a permit is required for the excavation and repair.
Visit siteKnox County — Permits
For properties in Knox County outside the City, verify permit requirements.
Visit siteWhat Not to Do
- Do not excavate without calling 811 first — it is required by Tennessee law
- Do not assume 811 marks all lines — private lines may need separate locating
- Do not begin excavation without confirming permit requirements
- Do not enter unsafe trenches or flooded excavation areas
- Do not attempt a water-line or sewer-line excavation yourself — it requires professional equipment and code-compliant installation
Still not sure who is responsible or what to do next?
Ask our AI Plumber — describe the problem and get guidance on whether it is likely on your side or the utility side.
Ask the AI PlumberVerify current requirements directly with the applicable authority.
Requirements may differ depending on whether the property is inside the City of Knoxville, elsewhere in Knox County, or served by another utility. Homeowners should verify current requirements with the applicable permitting authority before beginning work.
Common Questions
Can I excavate my own water line or sewer line?
It is strongly discouraged. Excavation for water and sewer lines requires professional equipment, code-compliant installation, proper backfilling, and often inspection. A licensed plumber will coordinate 811, permits, and safety. DIY excavation risks utility damage, code violations, and personal injury.
How long does the 811 process take?
In Tennessee, call at least 3 business days before you plan to dig. The utility operators typically have 2 business days to mark their lines (not counting the day of the call).
Does the plumber handle 811 and permits?
In most cases, yes. A licensed plumber experienced in excavation work will typically coordinate the 811 locate and obtain any required permits as part of the project. Confirm this with your plumber before work begins.
If the problem involves your home's plumbing, The Classic Plumber can help.
We diagnose before we recommend — and we tell you when the issue is on the utility's side.