Jackson County Area, South Dakota, Southern Part
The dominant drainage class is Well drained and the dominant hydrologic group is D (very slow infiltration, high 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 Jackson County Area, South Dakota, Southern Part.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Oglala-Canyon loams, 9 to 25 percent slopes | 60K | Well drained | B | Very limited | Very limited |
| Badland-Denby-Interior complex, 0 to 90 percent slopes | 58K | Well drained | Very limited | Very limited | |
| Epping-Kadoka silt loams, 9 to 18 percent slopes | 43K | Well drained | D | Very limited | Very limited |
| Badland | 33K | Excessively drained | D | Very limited | Very limited |
| Anselmo-Valentine complex, 5 to 20 percent slopes | 33K | Well drained | A | Somewhat limited | Very limited |
| Lohmiller silty clay loam, channeled, 0 to 2 percent slopes | 31K | Well drained | C | Very limited | Very limited |
| Kadoka-Epping silt loams, 3 to 9 percent slopes | 30K | Well drained | C | Somewhat limited | Very limited |
| Wortman-Wanblee complex, 0 to 6 percent slopes | 27K | Well drained | D | Somewhat limited | Very limited |
| Kadoka silt loam, 6 to 9 percent slopes | 23K | Well drained | C | Somewhat limited | Very limited |
| Tuthill-Anselmo fine sandy loams, 3 to 9 percent slopes | 21K | Well drained | A | Not limited | Not limited |
| Richfield-Keith silt loams, 3 to 9 percent slopes | 21K | Well drained | B | Somewhat limited | Very limited |
| Epping-Badland complex, 3 to 60 percent slopes | 21K | Somewhat excessively drained | D | Very limited | Very limited |
| Epping-Kadoka silt loam, 9 to 40 percent slopes | 21K | Somewhat excessively drained | D | Very limited | Very limited |
| Keith-Rosebud-Canyon complex, 5 to 9 percent slopes | 19K | Well drained | B | Somewhat limited | Very limited |
| Kadoka silt loam, 3 to 6 percent slopes | 17K | Well drained | C | Somewhat limited | Very limited |
| Tuthill-Manter fine sandy loams, 3 to 5 percent slopes | 16K | Well drained | B | Not limited | Not limited |
| Canyon-Oglala loams, 18 to 40 percent slopes | 15K | Well drained | D | Very limited | Very limited |
| Nihill gravelly loam, 3 to 40 percent slopes | 15K | Well drained | B | Very limited | Very limited |
| Keith-Ulysses silt loams, 3 to 9 percent slopes | 14K | Well drained | B | Not limited | Somewhat limited |
| Richfield-Keith silt loams, 0 to 3 percent slopes | 12K | Well drained | B | Somewhat limited | Very limited |
What This Means
Building & Foundations
About 55% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes, flood-prone areas. A geotechnical assessment is recommended before building.
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.