McCurtain County, Oklahoma
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 McCurtain County, Oklahoma.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Clebit-Carnasaw-Stapp association, 12 to 20 percent slopes | 240K | Well drained | B | Very limited | Very limited |
| Clebit-Carnasaw-Stapp association, 20 to 40 percent slopes | 159K | Well drained | C | Very limited | Very limited |
| Carnasaw-Clebit association, 12 to 20 percent slopes | 83K | Well drained | C | Very limited | Very limited |
| Felker loam, 0 to 2 percent slopes | 51K | Somewhat poorly drained | C | Very limited | Very limited |
| Ruston fine sandy loam, 3 to 8 percent slopes | 47K | Well drained | B | Not limited | Somewhat limited |
| Sherwood-Zafra complex, 5 to 12 percent slopes | 38K | Well drained | B | Somewhat limited | Somewhat limited |
| Water | 34K | D | Not rated | Not rated | |
| Guyton silt loam, 0 to 1 percent slopes, frequently flooded | 30K | Poorly drained | C/D | Very limited | Very limited |
| Pickens gravelly silt loam, 5 to 15 percent slopes | 27K | Somewhat excessively drained | D | Very limited | Very limited |
| Swink-Hollywood complex, 5 to 20 percent slopes | 26K | Well drained | D | Very limited | Very limited |
| Carnasaw-Zafra complex, 1 to 8 percent slopes | 21K | Well drained | C | Very limited | Very limited |
| Saffell gravelly fine sandy loam, 5 to 12 percent slopes | 21K | Well drained | B | Somewhat limited | Very limited |
| Blevins fine sandy loam, 1 to 3 percent slopes | 21K | Well drained | B | Not limited | Somewhat limited |
| Clebit-Rock outcrop complex, 35 to 60 percent slopes | 19K | Well drained | D | Very limited | Very limited |
| Guyton-Elysian complex, 0 to 3 percent slopes | 19K | Poorly drained | C | Very limited | Very limited |
| Kullit fine sandy loam, 1 to 3 percent slopes | 19K | Moderately well drained | C | Very limited | Very limited |
| Boggy-Pushmataha complex, 0 to 1 percent slopes, frequently flooded | 19K | Somewhat poorly drained | B/D | Very limited | Very limited |
| Tinn-Roebuck complex, 0 to 1 percent slopes, occasionally flooded | 18K | Moderately well drained | D | Very limited | Very limited |
| Ceda gravelly fine sandy loam, 0 to 2 percent slopes, frequently flooded | 18K | Well drained | A | Very limited | Very limited |
| Tiak-Ruston complex, 5 to 15 percent slopes | 15K | Moderately well drained | D | Very limited | Very limited |
What This Means
Building & Foundations
About 82% 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 84% 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.