Corson County, South Dakota
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 Corson County, South Dakota.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Rhoades-Daglum complex, 0 to 6 percent slopes | 97K | Moderately well drained | D | Very limited | Somewhat limited |
| Cabba-Reeder loams, 6 to 25 percent slopes | 89K | Well drained | D | Very limited | Very limited |
| Reeder-Cabba loams, 6 to 9 percent slopes | 72K | Well drained | C | Somewhat limited | Very limited |
| Reeder-Cabba loams, 3 to 6 percent slopes | 70K | Well drained | C | Somewhat limited | Very limited |
| Reeder loam, 3 to 6 percent slopes | 67K | Well drained | C | Somewhat limited | Very limited |
| Bullock-Parchin fine sandy loams, 0 to 9 percent slopes | 63K | Well drained | D | Somewhat limited | Very limited |
| Vebar-Flasher-Tally complex, 9 to 15 percent slopes | 60K | Well drained | B | Somewhat limited | Very limited |
| Flasher-Vebar-Parshall complex, 9 to 35 percent slopes | 55K | Somewhat excessively drained | D | Very limited | Very limited |
| Vebar-Parshall fine sandy loams, 3 to 6 percent slopes | 53K | Well drained | B | Somewhat limited | Very limited |
| Vebar-Cohagen fine sandy loams, 6 to 9 percent slopes | 50K | Well drained | B | Somewhat limited | Very limited |
| Water | 49K | Not rated | Not rated | ||
| Regent-Wyola silty clay loams, 3 to 6 percent slopes | 47K | Well drained | C | Very limited | Very limited |
| Daglum-Rhoades complex, 0 to 6 percent slopes | 38K | Moderately well drained | D | Very limited | Somewhat limited |
| Sansarc-Opal-Dupree clays, 9 to 25% slopes | 31K | Well drained | D | Very limited | Very limited |
| Shambo loam, 2 to 6 percent slopes | 30K | Well drained | B | Not limited | Very limited |
| Dupree-Rock outcrop complex, 6 to 30 percent slopes | 30K | Well drained | D | Very limited | Very limited |
| Rhoades-Daglum complex, 6 to 9 percent slopes | 28K | Well drained | D | Very limited | Somewhat limited |
| Reeder-Rhoades loams, 2 to 9 percent slopes | 26K | Well drained | C | Somewhat limited | Very limited |
| Wayden-Cabba complex, 9 to 40 percent slopes | 25K | Well drained | D | Very limited | Very limited |
| Bullock-Slickspots-Rock outcrop complex, 0 to 40 percent slopes | 25K | Well drained | D | Somewhat limited | Very limited |
What This Means
Building & Foundations
About 43% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.
Septic Systems
About 78% 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.