Utility Trenches for Water, Power and Sewer in Kootenai County

A utility trench is a narrow trench for a water, power or sewer line. In Idaho the excavator gives 811 notice two to ten business days before digging, and who calls 811, the depth, the bedding and who restores the surface should all be settled in writing.

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What utility trenching involves

A utility trench is a narrow, deep cut that carries a line from a source to a building: water, power or sewer. On a Kootenai County lot the run can be short or long, and it may cross clearing, a driveway or a pad.

The trench is only part of the job. A line goes in on bedding material, the trench is backfilled and the surface is restored. Each step has a person responsible for it, which is why the written scope matters: what depth, what bedding, who backfills and who restores the surface.

When people need trenching

A new house, shop or garage needs water, power or sewer service.
A well or septic location is far from the building it serves.
An outbuilding needs power from an existing service.
A line has to be replaced or moved.
A pad or foundation is going in and its lines must be placed first.
A lot is being developed and utilities must reach several places.

What the work usually looks like

Plan the route. The line route is chosen from source to building.
Locate. The dig area is marked in white paint and 811 notice is given.
Wait. Every utility on the ticket has to respond before digging.
Dig. The trench is cut to the planned depth.
Bedding and line. Bedding material goes in and the line is laid.
Backfill and restore. The trench is backfilled and the surface restored.

How to prepare

Trench jobs go better when these are settled first:

Know where the line starts and ends, and mark the route.
Settle who is requesting 811 and get the ticket number.
Keep track of the dates, because markings are valid for a limited time.
Settle the depth and bedding material.
Settle who backfills and who restores the surface.
Ask whether any permit applies.
Get the price, route length and what is included in writing.

What affects the cost

Excavation is commonly priced by the hour for operator and machine, or as a set price for a defined scope. For a trench, the total depends on how long the run is and what the ground is like.

Length of the run. A longer trench takes more machine time.
Depth. A deeper trench takes more time and material.
Ground conditions. Rock and wet ground slow digging.
Bedding material. What goes under and around the line adds cost.
Clearing the route. Brush and trees add work.
Surface restoration. Who restores the surface, and to what standard.

Reading a trench scope

A written trench scope turns an agreement into something both sides can check. It should name the start and end points, the depth, the bedding material, who requests 811, who backfills and who restores the surface, and the basis for the price. If the route changes once digging starts, the same document shows what the change does to the total.

Local rules and sources

811. Under Idaho Code 55-2205, the excavator marks the dig area in white paint and gives notice two to ten business days before digging. Once utilities mark their lines, the excavator is responsible for keeping the markings visible, and they stay valid for no more than four consecutive weeks. If digging hasn't started within three weeks of the notice, notice must be given again. Wait until every utility on the ticket has responded before you dig.

Dig Safe North Idaho 811 serves Bonner, Boundary and Kootenai counties (800-428-4950). 811 may route a call from near a county line to a different center; the direct line for Kootenai County is 800-428-4950.

Permits. Kootenai County says permits are required before site disturbance such as grading, excavating and storm drainage or run-off control, and building permits cover structures. Inside a city, start with the city's building or planning office. Outside city limits, start with Kootenai County's Building Division (208-446-1040).

Registration. Idaho requires contractors to register with the Idaho Contractors Board at the Division of Occupational and Professional Licenses (DOPL). Idaho law counts excavating as construction (Idaho Code 54-5203). Some work is exempt, such as a single small project priced under $2,000 that is not part of a larger job (54-5205). Check the company on DOPL's public search before you agree to anything.

Reasons to trust this page

Most rules on this page name their public source, such as an Idaho statute or a county office.
Cost factors are explained in plain terms, and this site does not quote prices.
The email address is shown at the top of every page, and the Privacy page says what a quote request collects.

Common questions

Who calls 811 before trenching in Kootenai County?

In Idaho the excavator marks the dig area in white paint and gives notice two to ten business days before digging. Dig Safe North Idaho 811 serves Bonner, Boundary and Kootenai counties (800-428-4950). Settle who is requesting 811 and get the ticket number before work begins.

How long do 811 markings last in Idaho?

Under Idaho Code 55-2205, once utilities mark their lines the excavator is responsible for keeping the markings visible, and they stay valid for no more than four consecutive weeks. If digging has not started within three weeks of the original notice, notice must be given again. Settle who is tracking the dates.

What should a trench scope say?

A trench scope should state the depth, the bedding material, who backfills and who restores the surface, along with who requests 811 and the ticket number. Put the route length and the price basis in writing too, so any change to the run can be compared against the original price.

How is trenching priced?

Excavation is commonly priced by the hour for operator and machine, or as a set price for a defined scope. For trenching, the length of the run, the depth and the ground conditions change the total. Get the scope in writing with what is included, so prices can be compared.

Do I wait for utilities to respond before digging?

Yes. Wait until every utility on the 811 ticket has responded before you dig. Once utilities mark their lines, the excavator is responsible for keeping the markings visible. Settle who is watching the ticket, and do not start until each utility has answered.

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