Trenching in Hendersonville & Middle Tennessee
A trench looks like the simplest thing on a job site. It is also the thing most likely to come back and cost somebody money. A trench cut at the wrong depth has to be reopened. A drainage trench cut without consistent fall holds water instead of moving it. A trench backfilled loose settles over the next two rainy seasons and leaves a sunken stripe across the yard that has to be regraded and reseeded. And a trench dug without locates called in can put a shovel through a gas line.
Dunnebacke Constructors trenches for utilities, irrigation, drainage, electrical service, and water and sewer lines across Hendersonville, Gallatin, Goodlettsville, Nashville, and the surrounding counties. We dig to the depth the job actually requires, hold grade where grade matters, and backfill and restore the surface so the trench disappears instead of announcing itself every time it rains.
Our Trenching Services
Utility Trenching
Trenching for buried utility runs — conduit, low-voltage, gas, and service lines. Dug to the depth the utility or inspector requires, with proper bedding material where the spec calls for it.
Irrigation Trenching
Clean, narrow trenching for irrigation mainlines and zone lines. Shallow enough to be efficient, deep enough to stay out of the way of aeration and normal yard work.
Drainage & Ditch Digging
Trenching for drain pipe, French drain systems, downspout burial, and open ditch work — cut at the fall the pipe needs so the water actually moves.
Water & Sewer Lines
Deeper trenching for water service and sewer laterals, dug at consistent grade with bedding and haunching so the pipe is supported along its whole length.
Electrical & Conduit
Trenching for electrical service runs, shop and barn feeds, and outbuilding power. Depth cut to code and marked so the inspector can see what they need to see.
Backfill & Restoration
The part most trenching outfits skip. We backfill in lifts, compact, and re-seed or restore the surface so you don’t have a settling scar across the yard next spring.
What We Trench For
Utility and Conduit Runs
Buried electric, low-voltage, irrigation control wire, gas service, and communications conduit. Required depths vary by utility type and by who is inspecting it — a low-voltage landscape run and a residential electrical service feed are not dug the same way. We cut to the depth the applicable code and the inspecting authority require, and we leave the trench open for inspection when inspection is part of the sequence.
Irrigation Lines
Irrigation trenching is about precision, not depth. Narrow trenches, minimal disturbance, consistent depth so heads sit right, and backfill that does not leave the lawn lumpy. Most residential irrigation trenching in Middle Tennessee runs shallow — deep enough to be out of the way of core aeration and normal yard maintenance, which is the practical standard that matters more than the theoretical one.
Drainage Pipe and French Drain Systems
This is the trenching where fall is everything. A drainage trench that dips — even slightly — in the middle of the run creates a low spot where water and sediment collect, and a pipe full of silt is a pipe that has stopped working. We shoot grade on drainage runs and hold consistent fall from inlet to outlet. Where the pipe needs bedding stone and a fabric wrap, it gets bedding stone and a fabric wrap.
Water Service and Sewer Laterals
Deeper work, and work where the pipe has to be supported continuously. A pipe that spans a soft spot or a rock point instead of bearing evenly along its length is a pipe under stress. We bed and haunch so the load is distributed, and we backfill in lifts rather than pushing the spoil pile back in and hoping.
Footings and Foundation Trenching
Footing trenches for porches, additions, outbuildings, and retaining structures — cut to width and depth from the plan or from what the inspector needs to see, with clean vertical sides and a bottom that is actually flat.
Why Middle Tennessee Trenching Is Different
The Limestone Shelf
Sumner and Davidson County sit on shallow limestone. On a lot of properties around Hendersonville and Gallatin you can be into solid rock at eighteen inches, or at four feet, or not at all — and there is frequently no way to know which until a bucket goes in the ground. This is the single biggest variable in trenching cost here, and it is the reason an honest trenching estimate in Middle Tennessee comes with a rock contingency rather than a flat per-foot number that quietly assumes dirt the whole way.
Clay That Behaves Two Different Ways
Middle Tennessee clay is hard and stable when it is dry and slick and unstable when it is saturated. That matters for trench wall stability, it matters for how well backfill compacts, and it matters for scheduling — there are weeks in February and March when trenching a particular site is simply the wrong call, and telling you that is cheaper for both of us than doing it anyway.
Backfill and Settlement
Loose backfill settles. Every time. The spoil you pull out of a trench is bulked up with air and will occupy noticeably more volume than the hole it came from, and if it goes back in one push it will consolidate over the following year into a visible depression. Backfilling in lifts with compaction between them is more work on the day and is the difference between a trench you forget about and a trench you look at every time you mow.
Our Process
Walk the Run and Call Locates
We walk the trench line with you, confirm where it starts and ends, talk through depth and what is going in the ground, and get Tennessee 811 locates placed before anything gets dug. We also ask about private lines a locate will not catch.
Specific Estimate, Including the Rock Question
You get a written price with the assumptions stated plainly — including how rock is handled if we hit it. No per-foot number that quietly assumes clean dirt the whole way and turns into a change order on day two.
Dig to Depth and Grade
We cut the trench to the specified depth, holding consistent fall on anything drainage-related. Spoil is stockpiled where it is not in the way and not washing into a neighbor’s yard or a street inlet.
Bed, Backfill, Compact, Restore
Bedding material where the pipe calls for it, backfill placed in lifts with compaction between them, and the surface put back — seed and straw or sod, depending on what was there. Owner Austyn Dunnebacke is on every job.
Owner on every job. Austyn Dunnebacke personally assesses and works every project. You are not dealing with a salesperson and a crew you have never met — the same person who looks at the work is the one who does it.
How Much Does Trenching Cost?
Pricing on this kind of work is job dependent. Every property is different — the price comes down to depth, length, access, and what's under the surface — so we don't publish price ranges that may not fit your job.
We're happy to give a free quote to anyone interested. Call (615) 887-1194 or request a free estimate — we'll come look at the property, tell you what's going on, and give you a specific price before any work begins. No obligation.
Call Before You Dig
Tennessee 811 is a free service and it is required by law before excavation. We call in locates on our own work as a matter of course, and we will not put a bucket in the ground on a run that has not been marked. If you are planning trenching work yourself, place the locate request well ahead of your dig date — marks are good for a limited window and the service needs lead time to get the utility owners out.
Worth knowing: 811 locates public and utility-owned lines. It does not locate what a previous owner buried on your property — private irrigation, invisible fence, landscape lighting, a line out to a shop or a well. Those come up in the walk-through, and the more you can tell us about what has been done on the property before, the fewer surprises we hit.
Areas We Serve
We work throughout Middle Tennessee, with quick response times across Sumner, Davidson, Robertson, Wilson, Montgomery, and Williamson counties.