Custer County Area, Colorado
The most common soil here is Feltonia, on about 8% of the land: a loam, a balanced mix that crumbles in your hand. Coutis and Rogert come next.
About 90% of the land drains well, and 10% stays wet for long stretches; groundwater comes within two feet of the surface under 5% of it.
USDA rates 96% of the land very limited for a standard septic drain field, and 52% very limited for homes with basements. That means extra cost or special design, not that it can't be done.
Worth knowing: 3% of the land floods occasionally or more, and bedrock lies within 40 inches under 38% of it.
Soils change over short distances, so look up an address below for the soil at that exact spot and the reasons behind each rating.
The soils you're most likely standing on
The biggest named soils in Custer County Area, Colorado, each drawn five feet deep from its official USDA description, in its recorded colors.
Dots mark gravel; white flecks mark lime. Shares are by acres across the survey area, and each mapped patch usually mixes several of these soils.
The biggest mapped areas
The dominant drainage class is Well drained and the dominant hydrologic group is A (high infiltration, low runoff). The most common soil order is Mollisols — grassland soils with a thick, dark, fertile topsoil rich in organic matter. This report summarizes the major soil map units across the survey area to help you understand what to expect when buying, building, or gardening in Custer County Area, Colorado. Search your address to find the exact soil composition, drainage, and series details at your specific location.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Rogert-Woodhall extremely cobbly sandy loams, 20 to 45 percent | 20K | Well drained | D | Very limited | Very limited |
| Redfeather-Rock outcrop complex, 5 to 35 percent slopes | 20K | Well drained | D | Very limited | Very limited |
| Feltonia sandy loam, 2 to 6 percent slopes | 19K | Well drained | A | Not limited | Very limited |
| Feltonia-Coutis sandy loams, 6 to 15 percent slopes | 16K | Well drained | A | Somewhat limited | Very limited |
| Granile-Peeler complex, 25 to 50 percent slopes | 13K | Well drained | B | Very limited | Very limited |
| Troutdale-Rogert complex, 5 to 15 percent slopes | 12K | Well drained | C | Somewhat limited | Very limited |
| Gelkie sandy loam, 1 to 10 percent slopes | 12K | Well drained | B | Not limited | Very limited |
| Coutis sandy loam, 5 to 15 percent slopes | 12K | Well drained | A | Somewhat limited | Very limited |
| Norriston very cobbly sandy loam, 2 to 6 percent slopes | 12K | Well drained | A | Somewhat limited | Very limited |
| Woodhall-Rogert extremely cobbly sandy loams, 5 to 20 percent | 11K | Well drained | C | Very limited | Very limited |
| Lamphier loam, 4 to 20 percent slopes | 9K | Well drained | B | Somewhat limited | Somewhat limited |
| Libeg extremely cobbly sandy loam, 5 to 20 percent slopes | 9K | Well drained | B | Very limited | Very limited |
| Alvarado very cobbly sandy loam, 2 to 5 percent slopes | 8K | Somewhat poorly drained | C | Very limited | Very limited |
| Coutis sandy loam, 2 to 5 percent slopes | 8K | Well drained | A | Not limited | Very limited |
| Boyle-Rock outcrop complex, warm, 25 to 55 percent slopes | 7K | Well drained | D | Very limited | Very limited |
| Rogert-Rock outcrop complex, 20 to 45 percent slopes | 6K | Well drained | D | Very limited | Very limited |
| Venable loam, 1 to 4 percent slopes | 6K | Poorly drained | B/D | Very limited | Very limited |
| Boyle very gravelly sandy loam, warm, 4 to 25 percent slopes | 6K | Well drained | D | Very limited | Very limited |
| Silvercliff cobbly sandy loam, 15 to 35 percent slopes | 5K | Well drained | A | Very limited | Very limited |
| Wix sandy loam, 3 to 25 percent slopes | 5K | Well drained | C | Somewhat limited | Very limited |
Soil Orders in This Area
The USDA classifies every soil into one of 12 soil orders. Here are the dominant orders found in this survey area.
What This Means
Building & Foundations
About 52% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes, poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 96% of soils are rated "very limited" for septic absorption fields. Despite good drainage overall, limitations may stem from shallow bedrock, steep slopes, or seasonal conditions. Engineered or alternative systems are frequently required. Always get a professional perc test before purchasing land that needs septic.
Gardening & Agriculture
Well-drained soils on sloped terrain — good for most plants but watch for erosion. Terracing, contour planting, and mulching help retain moisture and topsoil. Drip irrigation is more effective than sprinklers on slopes.