Harding 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 Harding County, South Dakota.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Parchin-Bullock fine sandy loams, 2 to 9 percent slopes | 143K | Well drained | C | Somewhat limited | Very limited |
| Bullock-Cabbart complex, 6 to 25 percent slopes | 107K | Well drained | D | Somewhat limited | Very limited |
| Twilight-Parchin fine sandy loams, 6 to 15 percent slopes | 85K | Well drained | B | Somewhat limited | Very limited |
| Cabba-Lantry-Amor loams, 9 to 25 percent slopes | 82K | Well drained | C | Very limited | Very limited |
| Twilight-Blackhall fine sandy loams, 9 to 25 percent slopes | 79K | Well drained | B | Somewhat limited | Very limited |
| Amor-Cabba loams, 6 to 9 percent slopes | 77K | Well drained | C | Somewhat limited | Very limited |
| Cabbart-Rock outcrop complex, 15 to 50 percent slopes | 75K | Well drained | D | Very limited | Very limited |
| Bullock-Parchin-Slickspots complex, 2 to 9 percent slopes | 73K | Well drained | D | Somewhat limited | Very limited |
| Rhame-Parchin fine sandy loams, 2 to 6 percent slopes | 56K | Well drained | B | Somewhat limited | Very limited |
| Rhoades-Daglum complex, 0 to 6 percent slopes | 48K | Moderately well drained | D | Very limited | Somewhat limited |
| Cohagen fine sandy loam, 15 to 50 percent slopes | 43K | Well drained | D | Very limited | Very limited |
| Archin-Bullock fine sandy loams, 0 to 4 percent slopes | 40K | Well drained | C | Not limited | Not limited |
| Twilight fine sandy loam, 6 to 9 percent slopes | 34K | Well drained | B | Somewhat limited | Very limited |
| Marmarth-Parchin fine sandy loams, 2 to 6 percent slopes | 34K | Well drained | C | Somewhat limited | Very limited |
| Rhame fine sandy loam, 2 to 6 percent slopes | 26K | Well drained | B | Somewhat limited | Very limited |
| Reeder-Cabba loams, 6 to 9 percent slopes | 23K | Well drained | C | Somewhat limited | Very limited |
| Cabbart-Delridge loams, 15 to 40 percent slopes | 22K | Well drained | D | Very limited | Very limited |
| Zeona loamy fine sand, 2 to 9 percent slopes | 20K | Excessively drained | A | Not limited | Very limited |
| Gerdrum silt loam, 0 to 4 percent slopes | 20K | Well drained | D | Very limited | Very limited |
| Rhoades-Rhoades, severely eroded complex, 0 to 6 percent slopes | 19K | Moderately well drained | D | Very limited | Somewhat limited |
What This Means
Building & Foundations
About 27% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.
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.