Service

Underground utility trenching

Every house, shop, and pole barn we work near has utilities buried somewhere on the property. Running new ones — water, sewer, electrical service, gas, fiber, or irrigation main — is a trenching job with code…

Services  /  Underground utility trenching

What we trench

  • Water service from the meter to the building, or well to building
  • Sewer line from the building to the septic tank or city main
  • Electrical service from the meter pole to detached buildings or out-buildings
  • Gas line from the propane tank or natural gas meter to the building (we trench; a licensed gas fitter does the connections)
  • Irrigation main lines to controllers and zones
  • Fiber and conduit pulls to detached structures and ADUs
  • Drain line from the building to a stormwater system

The trench is half the job

Most utility failures we get called back to investigate trace to one of three trenching mistakes:

  1. Wrong bedding. Pipe needs sand or fine soil under it and around it for a few inches — not rocks, not native clay. A pebble against a PVC water line at 60 psi becomes a pinhole leak six months later.
  2. Inadequate cover. Water lines need 36 inches of cover for frost protection in our zone. Electrical service needs 18-24 inches plus warning tape. Gas lines have their own depth requirements.
  3. Backfill compaction. Loose backfill settles, and settlement puts uneven loads on the pipe. We compact in lifts.

Getting any of these right takes more time than not getting them right. We build that time in.

Tennessee 811 and Georgia 811

Before any trench goes in, we call Tennessee 811 or Georgia 811. The locate service paints existing buried utilities and is free. We do not begin trenching until the locates are on the ground and current. Customer-side private lines (propane drops, sprinkler systems, invisible fences) are the homeowner's responsibility to mark, and we coordinate that with the property owner.

Sleeves and conduit for future runs

When we're trenching for one utility, it's almost always worth dropping in spare conduit for future runs at the same time. A 1.5-inch sleeve next to a water line costs almost nothing to add at trenching time and becomes the path for low-voltage, fiber, or a future electrical run later. We'll suggest it on every job.

Common projects

  • New water service from the meter to a house under construction
  • Sewer extension to a detached ADU or workshop
  • Electrical feed from the main panel to a detached garage
  • Gas line from a buried propane tank to a generator pad
  • Trench rerouting around a planned addition or pool

Meta

  • Meta title: Underground Utility Trenching in Chattanooga, TN | L & S Excavation
  • Meta description: Water line, sewer line, electrical, and gas line trenching across the Greater Chattanooga area. Locate-compliant, properly bedded, code-ready.

Recent work

Service areas

Available across the Greater Chattanooga area.

FAQs

Common questions, straight answers.

Do you call 811 or do I?

We do. Trenching without locates is a serious code violation and dangerous. We call 811 at least three working days before work begins.

Does the trench have to be straight?

No, but it should follow the gentlest curves possible and avoid crossing other utilities at sharp angles. We plan the route on the site walk and try to stay out of the way of trees, future construction, and existing improvements.

Do you make the connections?

We trench, bed, and place pipe or conduit. For pressurized water, gas, and electrical connections we coordinate with the licensed plumber, gas fitter, or electrician — they make the live connections and we backfill once their work is inspected.

How deep does each utility need to be?
  • Water service: 36 inches in our frost zone
  • Sewer: depends on the slope needed for gravity flow, but at least 18 inches at the building
  • Electrical service: 18 inches with warning tape; 24 inches without
  • Gas: 18-24 inches depending on the utility's spec

We hit each spec.

What about rock?

Hamilton County ridges hit limestone close to the surface. If a trench encounters rock, we'll work with you on whether to rock-saw, breaker, or reroute. We don't surprise you with a rock charge after the fact — we measure and call you first.

Can you trench across an existing driveway?

Yes. We can either open-cut and patch, or use a directional bore for short crossings. The right choice depends on driveway material and length.

Ready to break ground?

Let's talk about your site.

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