Dunn County, North 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 Dunn County, North Dakota.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Badland-Arikara-Cabbart complex, 15 to 70 percent slopes | 120K | Well drained | B | Very limited | Very limited |
| Cabba-Chama-Shambo loams, 9 to 50 percent slopes | 71K | Well drained | D | Very limited | Very limited |
| Rhoades-Daglum complex, 0 to 6 percent slopes | 62K | Moderately well drained | D | Very limited | Somewhat limited |
| Flasher-Vebar-Parshall complex, 9 to 35 percent slopes | 56K | Somewhat excessively drained | D | Very limited | Very limited |
| Vebar-Tally fine sandy loams, 6 to 9 percent slopes | 53K | Well drained | A | Somewhat limited | Very limited |
| Water | 47K | Not rated | Not rated | ||
| Vebar-Cohagen fine sandy loams, 9 to 15 percent slopes | 40K | Well drained | B | Somewhat limited | Very limited |
| Vebar-Parshall fine sandy loams, 3 to 6 percent slopes | 40K | Well drained | B | Somewhat limited | Very limited |
| Amor-Cabba loams, 9 to 15 percent slopes | 35K | Well drained | C | Somewhat limited | Very limited |
| Williams-Bowbells loams, 3 to 6 percent slopes | 29K | Well drained | C | Somewhat limited | Very limited |
| Korchea-Fluvaquents complex, channeled, 0 to 2 percent slopes, frequently flooded | 25K | Somewhat poorly drained | C | Very limited | Very limited |
| Sen-Janesburg silt loams, 6 to 9 percent slopes | 24K | Well drained | C | Very limited | Very limited |
| Chama-Cabba-Sen silt loams, 6 to 9 percent slopes | 24K | Well drained | C | Somewhat limited | Very limited |
| Straw loam, 0 to 2 percent slopes, rarely flooded | 23K | Well drained | C | Very limited | Very limited |
| Rhame-Fleak complex, 9 to 50 percent slopes | 19K | Well drained | D | Very limited | Very limited |
| Cabbart-Kremlin-Boxwell loams, 9 to 40 percent slopes, slumped | 19K | Well drained | D | Very limited | Very limited |
| Moreau-Barkof silty clays, 3 to 6 percent slopes | 19K | Well drained | D | Very limited | Very limited |
| Amor-Shambo loams, 3 to 6 percent slopes | 18K | Well drained | C | Somewhat limited | Very limited |
| Regent-Janesburg complex, 3 to 6 percent slopes | 18K | Well drained | C | Very limited | Very limited |
| Harriet loam, 0 to 2 percent slopes, occasionally flooded | 18K | Poorly drained | D | Very limited | Very limited |
What This Means
Building & Foundations
About 62% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes, poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 85% 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.