Grand Junction, Colorado: what the ground under the city is like
Grand Junction sits in Mesa County, on colorado plateau. The soil mapped here is predominantly classified well drained — and that classification, not the rainfall total, is what decides how a basement behaves.
22% of the mapped soil area around Grand Junction is wet enough that the USDA describes it as needing artificial drainage.
Linear extensibility 10.6% — very high.
Shallowest annual water table around 165 cm (5.4 ft).
Values are for Mesa County, which is what the soil survey resolves to. Full county report · soil map for a specific address.
The ground under Grand Junction
Colorado Plateau. Mancos and Morrison shale residuum, locally gypsiferous
Arid, so groundwater is rarely the problem, but Mancos Shale is strongly expansive and some soils are also gypsiferous, which dissolves. Two mechanisms that both move a footing without any water reaching the basement.
When it shows up here
| Water | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ground movement | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
Rainfall is low all year, so the water line stays flat. What moves is the ground: the late spring and early summer dry-down is the sharpest part of the cycle, and summer monsoon storms end it abruptly.
Climate pattern for this physiographic region, not a forecast for your house and not from the soil survey. It answers a question homeowners actually ask: when does this show up.
What repairs cost in Colorado
| Reference job | Modelled range |
|---|---|
| Interior drain along two walls + sump pump | $5,550–$11,950 |
| Exterior excavation of one 40 ft wall | $4,200–$11,900 |
| Underpinning on 10 piers | $16,500–$35,200 |
Regional factor for CO: ×1.10. Full cost breakdown for Colorado · run your own dimensions.
ZIP codes in Grand Junction
81501, 81502, 81503, 81504, 81505, 81506, 81507
Soil does not stop at a city boundary, and neither does this data — every ZIP code above resolves to the same county soil survey. For the individual survey polygons around one address, use the soil map.
Questions about Grand Junction
Is the soil the same everywhere in Grand Junction?
No. These values describe Mesa County as a whole, which is the unit the soil survey publishes. Within a city, map units change over a few hundred metres — the soil map draws the actual polygons around a point and is the honest answer for one address.
Which contractor should I call in Grand Junction?
We do not rank or recommend individual firms and we are not one. What this page is for is knowing which kind of work the ground here points to before anyone quotes you, and which claim to check. If you want quotes, the form below passes your request to the named networks.
Does this replace an inspection?
No. It tells you what the ground is; an inspection tells you what your building is doing on it. The useful order is: read this, print the brief for your county, then have someone look.
Get quotes in Grand Junction
We pass what you enter to the contractor networks listed below. You choose whether to hire anyone.
Page data updated