Cassia County, Idaho, West Part
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 Cassia County, Idaho, West Part.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Buko-Paniogue complex | 31K | Well drained | C | Not limited | Somewhat limited |
| Mackey-Rock outcrop complex | 21K | Well drained | C | Very limited | Very limited |
| Aysees gravelly loam, 1 to 12 percent slopes | 17K | Somewhat excessively drained | B | Not limited | Very limited |
| Drax silt loam | 17K | Moderately well drained | C | Very limited | Very limited |
| Portneuf silt loam, 1 to 3 percent slopes | 17K | Well drained | C | Not limited | Very limited |
| Weeks loam, 1 to 3 percent slopes | 14K | Well drained | C | Somewhat limited | Very limited |
| Portneuf silt loam, 0 to 1 percent slopes | 13K | Well drained | C | Not limited | Very limited |
| Bedke silt loam, 3 to 12 percent slopes | 12K | Well drained | C | Not limited | Somewhat limited |
| Declo loam, 0 to 1 percent slopes | 11K | Well drained | B | Not limited | Somewhat limited |
| Itca-Kanlee complex | 10K | Well drained | D | Very limited | Very limited |
| Alpowa gravelly loam, 20 to 60 percent slopes | 10K | Well drained | A | Very limited | Very limited |
| Wodskow sandy loam, drained | 9K | Well drained | A | Very limited | Somewhat limited |
| Reywat gravelly loam, 0 to 30 percent slopes | 8K | Well drained | D | Very limited | Very limited |
| Portneuf silt loam, 3 to 7 percent slopes | 7K | Well drained | C | Not limited | Very limited |
| Paniogue-Buko complex | 7K | Well drained | B | Not limited | Very limited |
| Beetville loam | 7K | Moderately well drained | B | Somewhat limited | Very limited |
| Trevino-Rock outcrop complex | 7K | Well drained | D | Very limited | Very limited |
| Mulett very cobbly loam, 4 to 20 percent slopes | 7K | Well drained | D | Very limited | Very limited |
| Wodskow sandy loam | 6K | Somewhat poorly drained | B | Very limited | Very limited |
| Alpowa loam, 3 to 12 percent slopes | 6K | Well drained | A | Somewhat limited | Very limited |
What This Means
Building & Foundations
About 39% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.
Septic Systems
About 73% 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.