Red Rock Lakes Area - Part of Beaverhead County, Montana
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 Red Rock Lakes Area - Part of Beaverhead County, Montana.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Ratiopeak, very stony-Rooset, stony complex, 15 to 45 percent slopes | 10K | Well drained | C | Very limited | Very limited |
| Regulus, frequently ponded-Sandrift complex, 0 to 1 percent slopes | 9K | Poorly drained | B/D | Very limited | Very limited |
| Maciver, stony-Rooset-Tibson, very stony complex, 8 to 45 percent slopes, landslides | 9K | Well drained | B | Very limited | Very limited |
| Water | 8K | Not rated | Not rated | ||
| Hellroaring-Narrows-Littletable complex, 0 to 4 percent slopes | 7K | Somewhat poorly drained | D | Somewhat limited | Very limited |
| Tepete-Tepete, frequently ponded-Water complex, 0 to 1 percent slopes | 7K | Very poorly drained | A/D | Very limited | Very limited |
| Sebud-Houlihan complex, 4 to 15 percent slopes | 6K | Well drained | B | Not limited | Very limited |
| Beancreek-Philipsburg complex, 0 to 4 percent slopes | 6K | Well drained | A | Not limited | Very limited |
| Rooset-Maciver, very stony complex, 8 to 50 percent slopes, landslides | 6K | Well drained | C | Very limited | Very limited |
| Maciver, stony-Tibson, very stony-Philipsburg complex, 2 to 15 percent slopes | 6K | Well drained | B | Not limited | Somewhat limited |
| Rooset-Maciver, stony-Bridger complex, 15 to 35 percent slopes | 6K | Well drained | C | Very limited | Very limited |
| Maciver, very stony-Philipsburg-Tibson, very stony complex, 8 to 35 percent slopes | 6K | Well drained | C | Very limited | Very limited |
| Rooset-Maciver, stony complex, 4 to 15 percent slopes | 6K | Well drained | C | Not limited | Somewhat limited |
| Sebud-Bullrey-Houlihan complex, 15 to 60 percent slopes | 5K | Well drained | B | Very limited | Very limited |
| Woodtick-Jackrabbit-Sandrift, frequently ponded complex, 0 to 4 percent slopes | 5K | Excessively drained | A | Not limited | Very limited |
| Woodtick-Jackrabbit-Beancreek complex, 2 to 8 percent slopes | 5K | Excessively drained | A | Not limited | Very limited |
| Philipsburg-Yacreek complex, 0 to 8 percent slopes | 5K | Well drained | B | Not limited | Somewhat limited |
| Bridger-Rooset complex, 15 to 35 percent slopes | 5K | Well drained | C | Very limited | Very limited |
| Rooset-Maciver, stony complex, 15 to 50 percent slopes | 5K | Well drained | C | Very limited | Very limited |
| Bridger-Rooset, stony-Ratiopeak, stony complex, 15 to 50 percent slopes | 5K | Well drained | C | Very limited | Very limited |
What This Means
Building & Foundations
About 57% of soils are rated "very limited" for dwellings with basements. Specific challenges include steep slopes, poor drainage in some areas. A geotechnical assessment is recommended before building.
Septic Systems
About 80% 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.