Castle Rock Area, Colorado
The dominant drainage class is Well drained and the dominant hydrologic group is C (slow infiltration, moderate runoff). 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 Castle Rock Area, Colorado.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Peyton-Pring-Crowfoot sandy loams, 5 to 25 percent slopes | 30K | Well drained | C | Somewhat limited | Very limited |
| Fondis-Kutch association | 27K | Well drained | C | Somewhat limited | Very limited |
| Fondis clay loam, 3 to 9 percent slopes | 21K | Well drained | C | Somewhat limited | Very limited |
| Bresser-Truckton sandy loams, 5 to 25 percent slopes | 16K | Well drained | B | Somewhat limited | Somewhat limited |
| Newlin-Satanta complex, 5 to 20 percent slopes | 14K | Well drained | B | Somewhat limited | Very limited |
| Newlin gravelly sandy loam, 8 to 30 percent slopes | 13K | Well drained | B | Very limited | Very limited |
| Stony steep land, cold | 11K | Well drained | D | Very limited | Very limited |
| Crowfoot-Tomah sandy loams, 5 to 25 percent slopes | 9K | Well drained | B | Somewhat limited | Very limited |
| Stapleton-Bresser association | 9K | Well drained | A | Very limited | Very limited |
| Coni rocky loam, 3 to 100 percent slopes | 9K | Well drained | D | Very limited | Very limited |
| Jarre-Brussett association | 9K | Well drained | B | Very limited | Very limited |
| Juget rocky complex, 20 to 65 percent slopes | 9K | Somewhat excessively drained | D | Very limited | Very limited |
| Kippen loamy sand, 1 to 20 percent slopes | 8K | Somewhat excessively drained | A | Somewhat limited | Very limited |
| Brussett loam, 3 to 9 percent slopes | 7K | Well drained | C | Not limited | Very limited |
| Hilly gravelly land | 7K | Well drained | D | Very limited | Very limited |
| Fondis clay loam, 1 to 3 percent slopes | 7K | Well drained | C | Somewhat limited | Very limited |
| Kettle loamy sand, 5 to 25 percent slopes | 7K | Somewhat excessively drained | A | Very limited | Very limited |
| Loamy alluvial land | 7K | Well drained | C | Very limited | Very limited |
| Bresser sandy loam, cool, 5 to 9 percent slopes | 7K | Well drained | B | Not limited | Somewhat limited |
| Loamy wet alluvial land | 6K | Poorly drained | D | Very limited | Very limited |
What This Means
Building & Foundations
About 37% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.
Septic Systems
About 90% 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.