Dunklin County, Missouri
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 Dunklin County, Missouri.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Dundee-Silverdale, rarely flooded, loamy sands, 0 to 1 percent slopes | 27K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Malden fine sand, 1 to 5 percent slopes | 22K | Excessively drained | A | Not limited | Very limited |
| Dubbs silt loam, 0 to 1 percent slopes | 22K | Well drained | B | Not limited | Very limited |
| Gideon loam, 0 to 1 percent slopes, occasionally flooded | 22K | Poorly drained | B/D | Very limited | Very limited |
| Canalou loamy fine sand, 0 to 1 percent slopes, rarely flooded | 16K | Moderately well drained | A | Very limited | Very limited |
| Dubbs-Silverdale, rarely flooded, complex, 0 to 1 percent slopes | 15K | Well drained | B | Somewhat limited | Somewhat limited |
| Sharkey silty clay, 0 to 1 percent slopes, occasionally flooded | 15K | Poorly drained | D | Very limited | Very limited |
| Sharkey silty clay loam, 0 to 1 percent slopes, occasionally flooded | 13K | Poorly drained | D | Very limited | Very limited |
| Bosket fine sandy loam, 0 to 1 percent slopes | 13K | Well drained | B | Not limited | Very limited |
| Sharkey-Steele complex, 0 to 1 percent slopes, rarely flooded | 13K | Poorly drained | D | Very limited | Very limited |
| Dundee silt loam, 0 to 1 percent slopes | 11K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Overcup silt loam, 0 to 1 percent slopes | 10K | Poorly drained | D | Very limited | Very limited |
| Sharkey clay, 0 to 1 percent slopes, rarely flooded, north | 10K | Poorly drained | D | Very limited | Very limited |
| Levees-Borrow pits complex, 0 to 25 percent slopes | 10K | Somewhat poorly drained | Not rated | Not rated | |
| Broseley loamy fine sand, 0 to 5 percent slopes | 9K | Somewhat excessively drained | A | Not limited | Very limited |
| Cairo silty clay, 0 to 1 percent slopes, occasionally flooded | 8K | Poorly drained | D | Very limited | Very limited |
| Farrenburg fine sandy loam, 0 to 1 percent slopes, rarely flooded | 8K | Moderately well drained | C | Very limited | Very limited |
| Lilbourn fine sandy loam, 0 to 1 percent slopes | 7K | Somewhat poorly drained | B/D | Very limited | Very limited |
| Sikeston loam, 0 to 1 percent slopes, occasionally flooded | 6K | Poorly drained | B/D | Very limited | Very limited |
| Overcup silt loam, 0 to 1 percent slopes, rarely flooded | 6K | Poorly drained | D | Very limited | Very limited |
What This Means
Building & Foundations
About 65% 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 90% 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.