Dirt delivery along the Front Range
Denver is a semi-arid city on claystone with about 15 inches of precipitation a year and a thin native soil layer. Almost every landscape job here means importing topsoil, and almost every foundation job comes back to keeping water away from expansive ground.
Which material do I need in Denver?
2 things drive every Denver dirt order: expansive claystone and a shortage of topsoil. Much of the Front Range corridor sits over claystone bedrock that heaves when it takes on water, so structural fill and positive drainage matter more here than in most of the country. And with about 15 inches of precipitation a year, almost every landscape job means importing 4 to 6 inches of topsoil rather than working with what is on site.
What is the ground under Denver made of?
Much of the Front Range urban corridor sits over the Pierre Shale and related claystone bedrock. Where that claystone is near the surface, and particularly where the beds are steeply dipping along the hogbacks on the western edge of the metro, expansive soil and heaving are a well documented regional problem. It is documented enough that structural floor systems over crawl spaces are common in new construction here in a way they are not in most of the country.
The other defining feature is how little topsoil there is. This is high, dry country that gets on the order of 15 inches of precipitation a year, and the native soil layer is thin and low in organic matter. Almost any landscape project in metro Denver, a new lawn, a bed, a regrade after construction, means importing topsoil, because there is not enough usable material on the site to work with.
What do people buy dirt for here?
The most common order in this market. New builds get handed over with subsoil at the surface and nothing that will grow grass. 4 to 6 inches of imported topsoil over the yard is what turns it into a lawn. A 4,000 square foot yard at 4 inches is about 50 cubic yards.
Positive drainage away from a foundation matters everywhere and it matters more where expansive claystone is in play, because water reaching that material under a slab is what drives heave. Backfill and perimeter grading is routine work here and it is routinely under-ordered.
The metro runs from Golden and the hogbacks in the west across to the flatter plains east of Aurora, and there is real terrain in between. Levelling a building envelope or a yard on a sloping Front Range lot takes fill in volume, and the cut and fill balance is rarely as even as people hope.
Utility trenches, window wells and post holes all need backfilling, and on a site where the native spoil is rock and claystone, bringing in clean fill is often faster and cheaper than trying to reuse what came out of the hole.
What do the local material names mean?
Colorado has a material vocabulary that catches people out when they move here, because almost none of it is used in Texas. These are the words you will hear quoted on the Front Range.
The Front Range term for the compactable, non-expansive fill used under foundations, slabs and pavements. It is the Colorado analogue of what Texas calls select fill: a material chosen because it compacts, stays compacted, and will not swell when it gets wet. Where the native claystone is unsuitable, the usual remedy is to over-excavate and rebuild with it.
A graded aggregate base specified to a Colorado class, used under driveways, parking and slabs. You will see it quoted as granite, recycled concrete or recycled asphalt depending on the source, at noticeably different prices. It is a base course rather than a fill. Ask us before you order whether we can source it for your address.
Local shorthand for a quarter inch minus washed material, used as a levelling and bedding course under pavers and flagstone and as pipe bedding. It is one of the most requested materials in metro Denver and one of the most misunderstood outside it.
Both are fine crushed aggregate used for paths, patios and dog runs, and they are not the same thing. Breeze runs to a larger particle, commonly around three eighths minus, costs more, and does not always hold a compacted surface as well as crusher fines do. If someone quotes you one and you expected the other, that is a real difference in finish.
Not a product, a hazard. Where claystone beds are near the surface, and especially where they are steeply dipping along the hogbacks on the western edge of the metro, swelling soil is a documented regional problem. It is why structural floor systems over crawl spaces are far more common in new construction here than in most of the country.
What about clean fill documentation and the Colorado season?
Colorado has state guidance on soil reuse and what qualifies as clean fill, administered through the state health department. For a homeowner backfilling a window well this never comes up. For a commercial job importing or exporting material in volume, the documentation trail on where soil came from and whether it is clean can be the thing that decides the schedule. If your job has that requirement attached, raise it when you call rather than after the material is on the ground.
The second constraint is the calendar rather than a regulation. Once the ground freezes, placing and compacting fill becomes difficult and landscape work largely stops, so the entire Front Range wants to do the same work in the same spring to autumn window. The queue in a Denver spring is long and it is predictable. On a large order, getting in the queue months ahead is genuinely cheaper here in a way it is not in our Texas markets.
Access is the third. Sites up against the foothills, on steep driveways or on narrow mountain-adjacent roads may not take an 18-wheeler at all, which means more trips in smaller trucks and a different price per cubic yard. Describe the approach when you order and we will size the equipment to it.
How does scheduling and access work here?
The season is the constraint. Once the ground freezes, placing and compacting fill gets difficult and landscape work largely stops, and everything wants to happen in the same spring to autumn window. On a large order, getting in the queue ahead of a Front Range spring is genuinely worth doing, because that queue is long and it is predictable.
Altitude and terrain also affect access. Sites up against the foothills, on steep driveways, or on narrow mountain-adjacent roads may not take an 18-wheeler at all, which means more trips in smaller trucks and a different price per cubic yard. Describe the approach when you order and we will size the truck to it.
How many yards will my Denver job take?
Topsoil is the volume order here. A 4,000 square foot yard at 4 inches deep is about 49 cubic yards, and at 6 inches about 74. Add roughly 10 percent for consolidation, because spread, watered and walked-on topsoil ends lower than you raked it.
Backfill and perimeter grading around a new foundation is smaller and easy to under-order. A 3 foot wide perimeter strip around a 40 foot by 60 foot house at 18 inches deep is about 33 cubic yards. Trench and window well reinstatement is usually 20 to 40 cubic yards on a single-lot job, which puts it right at the minimum order.
Which cities do we deliver to?
- Denver
- Aurora
- Arvada
- Lakewood
- Littleton
- Thornton
- Westminster
- Centennial
- Commerce City
- Englewood
- Glendale
- Golden
- Greenwood Village
- Lone Tree
- Parker
- Wheat Ridge
That covers most of the metro. If you are further out, up toward Boulder and Longmont or east past Aurora, ask, because it comes down to haul distance rather than a boundary on a map.
Denver dirt delivery questions
How much topsoil do I need for a Denver lawn?
4 to 6 inches over prepared subgrade. A 4,000 square foot yard at 4 inches is about 49 cubic yards and at 6 inches about 74. Add roughly 10 percent for consolidation. Almost every Denver landscape job means importing it, because the native soil layer here is thin and low in organic matter.
What is structural fill in Colorado?
The Front Range term for a compactable, non-expansive fill placed under foundations, slabs and pavements. It is what Texas plans call select fill. Where native claystone is unsuitable, the usual remedy is over-excavating the bad material and rebuilding with structural fill in compacted lifts.
Why does Denver soil heave?
Much of the Front Range urban corridor sits over Pierre Shale and related claystone. Those clays expand when they take on water. Where the beds are near the surface, and especially where they dip steeply along the western hogbacks, the swelling lifts slabs and footings. Keeping water away from the foundation is the main defence.
When is the best time to order dirt in Denver?
Order early for spring. Once the ground freezes, placing and compacting fill gets difficult and landscape work largely stops, so everything queues into the same spring to autumn window. On a large order, getting in that queue ahead is genuinely cheaper here if your job can absorb a longer window.
Do you deliver to Aurora, Lakewood and Littleton?
Yes. We list 16 metro Denver cities including Aurora, Lakewood, Littleton, Arvada, Thornton, Westminster, Centennial and Parker. If you are further out toward Boulder and Longmont or east past Aurora, ask, because it comes down to haul distance rather than a boundary.
Need dirt in Denver?
Tell us the address, the cubic yards and the date you need it by. If your address is not on the list above, ask anyway. Coverage is about haul distance.