Slope County, North Dakota
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 Slope County, North Dakota.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Patent-Badland-Cabbart complex, 6 to 50 percent slopes | 65K | Well drained | B | Very limited | Very limited |
| Chama-Cabba-Sen silt loams, 6 to 9 percent slopes | 24K | Well drained | C | Somewhat limited | Very limited |
| Badland-Cabbart complex, 6 to 70 percent slopes | 23K | Very limited | Very limited | ||
| Lonna-Kirby-Cabbart complex, 2 to 50 percent slopes | 20K | Well drained | B | Very limited | Very limited |
| Belfield-Daglum-Farland silt loams, 0 to 2 percent slopes | 19K | Moderately well drained | C | Very limited | Somewhat limited |
| Vebar-Parshall fine sandy loams, 3 to 6 percent slopes | 16K | Well drained | B | Somewhat limited | Very limited |
| Cabba-Chama silt loams, 9 to 15 percent slopes | 16K | Well drained | D | Very limited | Very limited |
| Rhoades-Daglum complex, 0 to 6 percent slopes | 14K | Moderately well drained | D | Very limited | Somewhat limited |
| Brandenburg-Cabba complex, 6 to 70 percent slopes | 14K | Well drained | A | Very limited | Very limited |
| Daglum-Rhoades complex, 0 to 6 percent slopes | 13K | Moderately well drained | D | Very limited | Somewhat limited |
| Cabbart-Cambeth silt loams, 9 to 15 percent slopes | 13K | Well drained | C | Somewhat limited | Very limited |
| Chama-Sen-Cabba silt loams, 3 to 6 percent slopes | 12K | Well drained | C | Somewhat limited | Very limited |
| Sen silt loam, 3 to 6 percent slopes | 12K | Well drained | B | Somewhat limited | Very limited |
| Patent, gullied, frequently flooded-Sham-Patent complex, 2 to 15 percent slopes | 12K | Well drained | B | Somewhat limited | Very limited |
| Grassna silt loam, 0 to 2 percent slopes | 11K | Well drained | B | Not limited | Somewhat limited |
| Belfield-Daglum-Farland silt loams, 2 to 6 percent slopes | 11K | Moderately well drained | C | Very limited | Somewhat limited |
| Harriet loam, 0 to 2 percent slopes, occasionally flooded | 11K | Poorly drained | D | Very limited | Very limited |
| Vebar-Tally fine sandy loams, 6 to 9 percent slopes | 10K | Well drained | A | Somewhat limited | Very limited |
| Fleak-Badland complex, 9 to 70 percent slopes | 10K | Excessively drained | D | Very limited | Very limited |
| Stady loam, 0 to 2 percent slopes | 10K | Well drained | B | Not limited | Very limited |
What This Means
Building & Foundations
About 64% 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 79% 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.