HomeGuide's 2026 national rate for trenching is $5 to $12 a linear foot, so 100 feet comes to $500 to $1,200. In Cheyenne, frost depth makes water line trenches deeper than in most of the country.
The costs quoted on this page are national ranges published by HomeGuide, and none of them is our price. Frost depth, caliche, swelling clay, access and the long hauls of rural Wyoming all change a Cheyenne job. We read the HomeGuide pages in October 2026.
What does trenching cost in Cheyenne, and how much for a 100-foot trench?
Trenching costs $500 to $1,200 for a 100-foot trench at HomeGuide's national $5 to $12 per foot, with about $2 to $3 of that for equipment and $3 to $9 for labor. Trench labor by itself is $35 to $65 an hour. Depth, caliche and frozen ground drive the cost up here.
| Length | HomeGuide national range |
|---|---|
| 50 ft | $250 to $600 |
| 100 ft | $500 to $1,200 |
| 200 ft | $1,000 to $2,400 |
Who should I call for a new water line, and what will it cost?
For a new water line, call a licensed plumber, who either digs with their own machine or brings in an excavator, and contact the Cheyenne Board of Public Utilities for a city service. HomeGuide puts main water line replacement at $2,000 to $5,000, around a $3,500 average, or $50 to $200 per foot trenched and $70 to $250 per foot trenchless.
How deep must a water line be buried so it does not freeze in Cheyenne?
A water line must be buried below the frost depth that your plumbing code and water provider set, and in Cheyenne that is deep. The plumber confirms the number for your address before we dig. A line buried too shallow on an exposed, windy lot is one of the most common winter failures we see.
What does it cost to dig up and replace a frozen or broken sewer line?
Replacing a sewer line costs $50 to $250 a foot on HomeGuide's sewer page, so a 40-foot run is $2,000 to $10,000. Without a trench, bursting the pipe costs $60 to $200 a foot and relining it $90 to $250. Before any digging, a camera run ($125 to $500) shows where the pipe failed.
What does a trench for an electric line to a shop or garage cost?
A trench for an electric line to a shop or garage costs the same $5 to $12 per foot as other trenching in HomeGuide's figures. In Wyoming, electrical work is licensed by the state Department of Fire Prevention and Electrical Safety, so a licensed electrician installs the wire and sets the depth. Our part is the trench and the backfill.
What does it cost to bury a gas or propane line?
A buried gas line costs $12 to $25 per foot, or $350 to $1,000 or more, on HomeGuide's trenching page. A licensed plumber or gas fitter installs and tests it. Propane tanks on ranchettes follow the supplier's setback rules.
Can a line be bored under my driveway in frozen ground?
Yes, a line can be bored under a driveway. A directional bore costs $10 to $30 a foot in HomeGuide's figures, so most jobs fall between $1,000 and $9,000, and 100 feet is $1,000 to $3,000. It costs more per foot than trenching but leaves the driveway in place.
Can water and sewer be laid in the same frost-deep trench?
Water and sewer can be laid in the same trench only if the plumbing code's required separation between them is met. The plumber sets the layout. When it works, a single deep trench saves digging through frost twice.
Can you trench close to my house or near tree roots?
Yes, carefully. Near a house we keep the trench clear of the footing and backfill the same day so frost cannot reach under it. Near shade trees, which take years to grow here, we route around the roots or bore under them.
Want a price for your own place? Call or text (307) 317-7006, and after a site visit we put the scope and the cost on paper.