Land Excavation in Bozeman, MT
Radar58 grades, trenches, and shapes the ground so snowmelt and spring runoff drain away from your foundation instead of into it. Free site assessments across the Gallatin Valley.
Drainage and erosion strategies that keep Bozeman snowmelt and spring runoff away from your foundation.
July 1, 2026
Every spring, the same thing happens across the Gallatin Valley. A warm stretch in March or April lets a whole season of snowpack go at once, and the water has to find somewhere to run. On a well-graded lot it drains off and disappears. On a poorly graded one, it ends up against a foundation wall near Mendenhall Street. Here is how to get ahead of it before the melt arrives.
The best time to spot a drainage problem is during a rain or right as the snow leaves. Walk the property and note where water pools, which direction it runs, and whether any of it heads toward the house. Those low spots and the slope of the ground next to your foundation tell you almost everything. If the grade tilts toward the structure, that is the first thing to fix.
Most drainage trouble comes down to slope. The ground within the first several feet of a foundation should fall away from it, not toward it. Regrading to a positive slope is the least invasive and least expensive fix, and it solves a surprising number of wet-basement complaints on its own. Our grading and site prep crew builds that slope on a compacted subgrade so it holds through the freeze-and-thaw cycle instead of settling back into a puddle.
Sometimes the water is coming from below, not across. High groundwater and clay soil that will not drain call for a buried solution. A French drain, a gravel-and-pipe trench wrapped in fabric, intercepts that water and carries it away. A swale handles surface flow. Our page on French drains and swales covers when each one fits, and many Bozeman lots end up using both.
Drainage work is easiest to do in late summer and fall, when the ground is dry and workable and there is time to finish before winter. Doing it then means the fix is ready for the next melt rather than being installed in a panic during it. Waiting until water is already in the basement limits your options and raises the cost.
Before any trench or basin gets dug, an 811 locate marks buried utilities, usually with two business days notice. It is free, it is required, and it keeps a drainage project from turning into a gas or water line repair. We never put a bucket in the ground before the locates are in.
Want a plan before the next thaw? Contact us or call Radar58 at (406) 718-1030 for a free on-site drainage assessment in Bozeman.
Different water problems call for different fixes. Here is the range of drainage and excavation work we bring to a Bozeman property, and roughly when each one fits.
Positive grading away from structures plus swales, French drains, and detention features, with silt fence and erosion blankets to meet stormwater rules on larger sites.
Topsoil stripping, cut and fill, and rough-to-finish grading that sets pad elevations and drainage slopes on a compacted subgrade ready to build on.
Gravel and perforated pipe wrapped in geotextile fabric to pull groundwater away from a wet basement wall or a soggy low spot in the yard.
Trenching for water, sewer, and drainage lines with proper bedding and backfill, using a trench box for worker protection in cuts 5 feet and deeper per OSHA.
Shaping retention and detention basins to a designed volume and side slopes, with keyed embankments and riprap outlet armoring that handles peak runoff.
Engineered fill placed in controlled lifts and compacted to a specified density (commonly 95 percent by Proctor test) so pads and backfill stay put.
Radar58 provides land excavation in Bozeman, MT, with a specialty in drainage and erosion work. Our crews handle site preparation and grading, drainage and erosion control, trenching and utility excavation, foundation and basement excavation, pond and detention basin excavation, and soil compaction and structural fill. Where other outfits treat drainage as an afterthought, we build the whole site around it, because in the Gallatin Valley water is the thing that damages a property first. That focus runs through every job we take on across Gallatin County.
Most of the calls we get start the same way. A homeowner notices a wet basement wall every April, or a driveway that washes out along Baxter Lane, or a yard that pools near the foundation once the snow leaves the Bridger foothills. The cause is almost always the same, which is ground that slopes toward the house instead of away from it. We regrade that ground to a positive slope, then back it up with swales, French drains, and detention features so the water has somewhere to go.
Bozeman sits at roughly 4,800 feet, and the melt cycle here is brutal on poorly graded lots. A warm week in March can move a season of snowpack in days, and clay-heavy subsoil holds that water right where it lands. We plan for that. Every grading plan we cut accounts for spring runoff volume, frost depth, and the compacted subgrade that keeps a fix from settling back out. We compact structural fill in lifts and confirm density so the work holds for years, not one season.
We keep the process straightforward and local. We come out, walk the low spots with you, and hand you a written scope before any machine moves dirt. Then we bring in the excavator, skid steer, or dozer the job actually needs and grade to the plan. Whether you are on a tight infill lot near Cooper Park (59715) or a larger parcel out toward Four Corners, the goal is the same, which is to stop the water before it costs you a foundation.
Drainage pricing depends on the size of the wet area, the fix it needs, and how much dirt has to move. Regrading a yard is the most economical starting point, buried French drains and swales sit in the middle, and a full detention basin runs higher. The ranges below are typical for the Bozeman area, and we put a firm number in writing after a free on-site assessment.
We handle drainage and grading throughout Bozeman and the surrounding Gallatin County communities, from tight city lots to acreage in the valley.
Not sure if we reach your parcel? Call (406) 718-1030 and we will let you know.
Ready to keep the runoff out of your basement? We will walk your property, find where the water is going wrong, and give you a clear written scope with no pressure. Most Bozeman drainage fixes are quicker and cheaper than the foundation repair they prevent, and we handle everything from the regrade to the final riprap.