Seven Devils Area, Idaho
The dominant drainage class is Well drained and the dominant hydrologic group is B (moderate infiltration). 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 Seven Devils Area, Idaho.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Dystric Cryochrepts, glacial trough bottoms | 14K | Well drained | B | Very limited | Very limited |
| Ultic Argixerolls, dissected stream breaklands, moist | 11K | Well drained | C | Very limited | Very limited |
| Ultic Argixerolls, dissected mountain slopes, moist | 9K | Well drained | C | Very limited | Very limited |
| Rock outcrop-Cryepts-Rubble land complex, 40 to 70 percent slopes, glacial cirques | 9K | D | Not rated | Not rated | |
| Dystric Cryochrepts, steep glacial trough walls | 8K | Well drained | B | Very limited | Very limited |
| Dystric Cryochrepts-Rock outcrop complex, very steep glacial trough walls, andesite substratum | 8K | Well drained | B | Very limited | Very limited |
| Lithic Ultic Argixerolls-Rock outcrop complex, dissected stream breaklands | 7K | Well drained | D | Very limited | Very limited |
| Dystric Cryochrepts-Typic Cryandepts complex, steep moraines | 6K | Well drained | B | Very limited | Very limited |
| Ultic Argixerolls-Rock outcrop complex, dissected stream breaklands, dry | 6K | Well drained | C | Very limited | Very limited |
| Dystric Cryochrepts, glacial trough walls | 6K | Well drained | B | Very limited | Very limited |
| Ultic Argixerolls, steep dissected mountain slopes | 6K | Well drained | C | Very limited | Very limited |
| Dystric Cryochrepts, dissected mountain slopes, basalt and andesite substrata | 5K | Well drained | B | Very limited | Very limited |
| Inceptisols, Mollisols and Alfisols, moderately steep landslide deposits | 5K | Well drained | B | Very limited | Very limited |
| Ultic Argixerolls-Rock outcrop complex, dissected stream breaklands | 4K | Well drained | C | Very limited | Very limited |
| Cryepts-Rock outcrop complex, 5 to 55 percent slopes, glacial trough bottoms | 4K | Well drained | B | Very limited | Very limited |
| Brody-Wapshilla association | 4K | Well drained | B | Very limited | Very limited |
| Klickson-Bluesprin association | 4K | Well drained | B | Very limited | Very limited |
| Rock outcrop | 4K | D | Not rated | Not rated | |
| Dystric Cryochrepts, dissected stream breaklands, andesite substratum | 4K | Well drained | B | Very limited | Very limited |
| Ultic Argixerolls, undissected stream breaklands, dry | 3K | Well drained | C | Very limited | Very limited |
What This Means
Building & Foundations
About 89% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes. A geotechnical assessment is recommended before building.
Septic Systems
About 89% 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.