Excavation & Site Preparation

Excavation in the Colorado high country is not just moving dirt — it is the first decision your entire project rests on. At Hilltop Mountain Services, we cut, grade, and prepare ground for new homes, additions, outbuildings, and commercial sites across the Front Range, from the foothills of Jefferson County up through Park County and the Summit County corridor. Every cut we make accounts for what that specific piece of mountain is going to do over the next thirty winters, not just what it looks like on a dry day in July.

Most of our excavation work falls into two buckets: new construction site prep and property-improvement earthwork. On the new-build side that means foundation excavation, basement digs, crawlspace cuts, driveway grading, and the utility trenching that has to land before the slab. On the improvement side it is regrading a lot that has been shedding water toward the house for a decade, cutting a building pad for a garage or shop, opening up an overgrown parcel for a homesite, or fixing a driveway that has been washing out every spring since it was built.

What ties all of it together is accountability. You are not hiring a guy with a backhoe and a guess. You are hiring a team led by an operator who reads the slope, reads the soil, and cuts to a grade your foundation crew, your surveyor, and your county will all sign off on the first time.

The Front Range runs on a short list of soils that all behave badly when they get wet and frozen. Decomposed granite in Genesee and Bergen Park drains fast but slumps on steep cuts. Heavy clay in parts of Conifer and Evergreen holds water like a sponge and heaves when it freezes. Shale and decomposed rock in Bailey and Fairplay can look solid and then shear off the moment you load a cut the wrong way. Sandy loam near Idaho Springs and Georgetown moves every time the snowmelt runs.

That means excavation up here is less about cubic yards and more about predicting what that material does through a freeze-thaw cycle. A cut that looks clean in August can slump by November if it was not laid back to a stable angle or if the water was not managed. A building pad that tests fine on a dry day can go soft in spring runoff if the drainage was not built in from the start. We build for the season you are not in.

The other piece is the water. In the mountains, water is always the real project. If the excavation does not solve the drainage, the foundation, the driveway, and the retaining walls downstream of it are all going to fail on a timer. We grade to move water away from structures and off the site on purpose, not by accident.

Most of the excavation calls we get are not greenfield new builds — they are fixes. A lot that has been collecting water in the wrong place for years. A driveway cut so steep it washes out every spring. A building pad left by a previous operator that is the wrong elevation or the wrong shape for the structure that is actually going on it. A hillside that started moving after a neighbor cleared above it.

We regrade lots that drain toward the house so they drain away from it. We rebuild driveway cuts that wash out, adding crown, ditch, and culvert so the water has somewhere to go. We fix building pads that were cut too high, too low, or off-square. We open overgrown parcels that have not been touched in a decade and get them to a buildable state — cleared, leveled, and ready for the next crew to walk on.

If your project has already been started by someone else and gone sideways, that is the kind of call we take. We will come look at what is there, tell you what it will take to make it right, and give you a straight answer about whether it is worth saving or worth starting over.

Every excavation job starts with a site walk. We want to see the slope, the existing vegetation, where the water is coming from, and where it is going. If there is a survey or a plot plan, we work off it. If there is not, we help you figure out what you actually need before we move a machine.

From there we lay out the cut: where the building pad goes, where the driveway runs, where the water will be directed, and what material we expect to find. We then cut to grade, manage the spoils (haul off, stockpile, or spread on site depending on the plan), and shape the drainage at the same time. We do not leave a site "close" — we leave it graded, drained, and ready for the next trade.

On most residential excavation we can be in and out in a few days to a week depending on scope and access. On larger parcels and commercial work we stage it so the site is never a hazard to the neighbors or the crew between visits. You get a schedule up front and a phone call when something changes, because something always changes on a mountain job.

We run the right machine for the access and the material — not the biggest machine we own. A lot of mountain lots have narrow access, tight turnarounds, and overhead branches that rule out a full-size excavator. We match the equipment to the job so we are not tearing up your existing driveway or your neighbor's property to get a bigger machine in than the work needs.

Our cuts are laid back to stable angles for the soil type, not to whatever was fastest on the day. Drainage is built into the grade, not added as an afterthought. Spoils are handled per the plan — hauled, stockpiled, or spread — and the site is left in a state the next trade can actually work from.

We work to the standards your county expects. Jefferson County, Park County, Clear Creek County, and the local HOAs each have their own rules on cuts, fills, drainage, and setback. We know the difference and we do not hand you a finished excavation that the county is going to make you redo.

Our excavation work runs the central Front Range and the high country behind it. We work regularly in Pine, Conifer, Evergreen, Bailey, Idaho Springs, Georgetown, Golden, Morrison, Fairplay, Buffalo Creek, Bergen Park, and Genesee. If you are on the corridor between the foothills and the Divide, we are probably already working near you.

That matters for excavation more than for most trades. A crew that knows your specific area knows what the soil does, what the county wants, and what the access looks like before we drive up. It means a more accurate estimate, fewer surprises, and a job that finishes on the schedule we gave you instead of a hopeful one.

Not sure if you are in our territory? Tell us the address. We cover a wide band of the Front Range and the high country, and if you are outside it we will tell you straight rather than drag a bid out.

Before you put a machine on your mountain lot, ask the operator how they will handle the water — not just the dirt. If they do not have a drainage plan before they start cutting, you are going to pay for it later. Ask what they expect to find for soil and what they will do if it changes, because it will. Ask who is responsible if the county wants the cut laid back further after the fact.

Ask about access. If your driveway is narrow or the turn is tight, a contractor who shows up with the wrong size machine will either tear up your entrance or walk off the job. Ask whether spoils are included — hauled off, left on site, or spread — and get that in writing so it is not a change order later.

And ask for references on jobs like yours, not just their best photos. A clean new-build pad and a slumping-lot regrade are different problems. You want an operator who has done the one you actually have, in terrain like yours, recently.

If you are breaking ground on a new home, an addition, a shop, or a commercial site in the Colorado mountains — or if you inherited a lot that drains the wrong way and you need it fixed before the next spring — we will come look at it and give you a real plan. Tell us the parcel, the scope, and your timeline, and you will get an assessment back from a team that has actually run machines on ground like yours.

Call 720 602 5060 or use the project configuration on the contact page. We work across the Front Range and the high country, year-round when the ground allows, and we will tell you straight whether your job is a few days of grading or a full site build.