Sebastian County, Arkansas
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 Sebastian County, Arkansas.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Enders-Mountainburg complex, 20 to 40 percent slopes | 50K | Well drained | D | Very limited | Very limited |
| Leadvale silt loam, 3 to 8 percent slopes | 44K | Moderately well drained | C/D | Very limited | Very limited |
| Leadvale silt loam, 1 to 3 percent slopes | 43K | Moderately well drained | C/D | Very limited | Very limited |
| Enders-Mountainburg complex, 8 to 20 percent slopes | 31K | Well drained | D | Somewhat limited | Very limited |
| Taft silt loam, 0 to 1 percent slopes | 28K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Mountainburg sandy loam, 3 to 12 percent slopes | 25K | Well drained | D | Very limited | Very limited |
| Mountainburg stony sandy loam, 3 to 12 percent slopes | 20K | Well drained | D | Very limited | Very limited |
| Cane fine sandy loam, 3 to 8 percent slopes | 17K | Moderately well drained | C | Very limited | Very limited |
| Wrightsville silt loam, 0 to 2 percent slopes | 11K | Poorly drained | D | Very limited | Very limited |
| Enders stony silt loam, 12 to 30 percent slopes | 9K | Well drained | D | Very limited | Very limited |
| Water | 7K | D | Not rated | Not rated | |
| Linker fine sandy loam, 3 to 8 percent slopes | 7K | Well drained | C | Very limited | Very limited |
| Wrightsville-Messer silt loams complex, 0 to 1 percent slopes | 7K | Poorly drained | D | Very limited | Very limited |
| Mountainburg stony sandy loam, 12 to 35 percent slopes | 6K | Well drained | D | Very limited | Very limited |
| Crevasse soils | 6K | Excessively drained | A | Very limited | Very limited |
| Severn silt loam | 4K | Well drained | A | Very limited | Very limited |
| Barling silt loam | 4K | Moderately well drained | C | Very limited | Very limited |
| Muskogee silt loam, 3 to 8 percent slopes | 4K | Moderately well drained | C/D | Very limited | Very limited |
| Pits, quarry | 3K | D | Not rated | Not rated | |
| Sallisaw stony loam, 1 to 8 percent slopes | 3K | Well drained | B | Not limited | Somewhat limited |
What This Means
Building & Foundations
About 86% 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 95% 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.