Kooskia Area, Idaho County, 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 Kooskia Area, Idaho County, Idaho.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Suttler loam, 30 to 65 percent slopes | 27K | Well drained | B | Very limited | Very limited |
| Jughandle sandy loam, 35 to 65 percent slopes | 27K | Somewhat excessively drained | A | Very limited | Very limited |
| Klicker silt loam, 40 to 65 percent slopes | 18K | Well drained | C | Very limited | Very limited |
| Gwin-Mehlhorn stony loams, 45 to 65 percent slopes | 15K | Well drained | D | Very limited | Very limited |
| Lochsa sandy loam, 25 to 65 percent slopes | 11K | Somewhat excessively drained | A | Very limited | Very limited |
| Typic Dystroxerepts-Typic Udivitrands complex, dissected stream breaklands | 9K | Well drained | B | Very limited | Very limited |
| Kooskia silt loam, 2 to 7 percent slopes | 8K | Moderately well drained | C | Very limited | Very limited |
| Gwin-Mehlhorn stony loams, 12 to 45 percent slopes | 8K | Well drained | D | Very limited | Very limited |
| Andic Dystrochrepts, dissected mountain slopes | 7K | Well drained | B | Very limited | Very limited |
| Kooskia silt loam, 7 to 12 percent slopes | 7K | Moderately well drained | C | Very limited | Very limited |
| Typic Dystroxerepts-Typic Udivitrands complex, dissected mountain slopes | 6K | Well drained | B | Very limited | Very limited |
| Klickson-Bluesprin complex, 30 to 75 percent slopes | 6K | Well drained | C | Very limited | Very limited |
| Caribel silt loam, 12 to 25 percent slopes | 6K | Well drained | C | Very limited | Very limited |
| Klicker silt loam, 12 to 40 percent slopes | 6K | Well drained | C | Very limited | Very limited |
| Brody cobbly silt loam, 35 to 65 percent slopes | 6K | Well drained | C | Very limited | Very limited |
| Typic Udivitrands, high relief rolling uplands | 6K | Well drained | B | Very limited | Very limited |
| Typic Dystroxerepts, dissected stream breaklands | 6K | Well drained | B | Very limited | Very limited |
| Lochsa-Yakus complex, 30 to 65 percent slopes | 5K | Somewhat excessively drained | A | Very limited | Very limited |
| Molly loam, 12 to 30 percent slopes | 5K | Well drained | B | Very limited | Very limited |
| Typic Vitrandepts, low relief rolling uplands | 5K | Well drained | B | Very limited | Very limited |
What This Means
Building & Foundations
About 100% 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 100% 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.