Tunica County, Mississippi
The dominant drainage class is Poorly 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 Tunica County, Mississippi.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Sharkey clay, 0 to 1 percent slopes, rarely flooded, south | 106K | Poorly drained | D | Very limited | Very limited |
| Sharkey clay, 0 to 2 percent slopes, frequently flooded | 27K | Poorly drained | D | Very limited | Very limited |
| Newellton-Tunica complex, undulating, frequently flooded | 21K | Somewhat poorly drained | D | Very limited | Very limited |
| Tensas silty clay loam, 0 to 2 percent slopes | 18K | Somewhat poorly drained | D | Very limited | Very limited |
| Water | 18K | Not rated | Not rated | ||
| Dundee silt loam, 0 to 2 percent slopes, rarely flooded | 14K | Somewhat poorly drained | C | Very limited | Very limited |
| Alligator clay, 0 to 1 percent slopes, rarely flooded, east | 11K | Poorly drained | D | Very limited | Very limited |
| Keyespoint silty clay, 0 to 2 percent slopes | 9K | Somewhat poorly drained | D | Very limited | Very limited |
| Sharkey clay, ponded | 9K | Very poorly drained | D | Very limited | Very limited |
| Teksob very fine sandy loam, 0 to 2 percent slopes | 7K | Well drained | A | Very limited | Very limited |
| Askew-Tensas-Openlake complex, undulating | 7K | Somewhat poorly drained | D | Very limited | Very limited |
| Commerce silt loam, 0 to 2 percent slopes | 6K | Somewhat poorly drained | C | Very limited | Very limited |
| Commerce silty clay loam, 0 to 2 percent slopes, frequently flooded | 5K | Somewhat poorly drained | C | Very limited | Very limited |
| Pits and Aquepts, frequently flooded | 5K | Very limited | Very limited | ||
| Askew very fine sandy loam, 0 to 2 percent slopes | 5K | Moderately well drained | C | Very limited | Very limited |
| Robinsonville very fine sandy loam, 0 to 2 percent slopes | 3K | Well drained | A | Very limited | Very limited |
| Dubbs silt loam, 0 to 2 percent slopes | 3K | Well drained | B | Very limited | Very limited |
| Miscellaneous water | 3K | Not rated | Not rated | ||
| Crevasse and Riverwash soils, 0 to 2 percent slopes, frequently flooded | 3K | Excessively drained | A | Very limited | Very limited |
| Bruin and Newellton soils, undulating, frequently flooded | 3K | Moderately well drained | D | Very limited | Very limited |
What This Means
Building & Foundations
About 92% of soils are rated "very limited" for dwellings with basements. Specific challenges include poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 92% of soils are rated "very limited" for septic absorption fields. Poorly drained soils can't absorb septic effluent effectively. Engineered or alternative systems are frequently required. Always get a professional perc test before purchasing land that needs septic.
Gardening & Agriculture
Many soils hold water for extended periods. Raised beds are highly recommended to improve drainage for vegetables. Well-adapted native plants and water-loving species will do best in natural conditions.