Sequoyah County, Oklahoma
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 Sequoyah County, Oklahoma.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Hector-Linker-Enders complex, 5 to 40 percent slopes, extremely stony | 212K | Well drained | D | Very limited | Very limited |
| Linker-Hector complex, 3 to 5 percent slopes | 36K | Well drained | D | Very limited | Very limited |
| Stigler silt loam, 1 to 3 percent slopes | 31K | Moderately well drained | D | Very limited | Very limited |
| Water | 26K | D | Not rated | Not rated | |
| Guyton and Rexor soils, 0 to 1 percent slopes, frequently flooded | 14K | Poorly drained | C/D | Very limited | Very limited |
| Linker and Stigler soils, 3 to 8 percent slopes, severely eroded | 13K | Somewhat poorly drained | C | Very limited | Very limited |
| Stigler-Wrightsville silt loams complex, 0 to 1 percent slopes | 11K | Moderately well drained | D | Very limited | Very limited |
| Shermore loam, 3 to 5 percent slopes, moderately eroded | 9K | Somewhat poorly drained | D | Very limited | Very limited |
| Linker-Hector complex, 5 to 8 percent slopes | 8K | Well drained | C | Very limited | Very limited |
| Shermore loam, 3 to 5 percent slopes | 7K | Somewhat poorly drained | D | Very limited | Very limited |
| Guyton silt loam, 0 to 1 percent slopes, frequently flooded | 6K | Poorly drained | C/D | Very limited | Very limited |
| Coushatta silt loam, 0 to 1 percent slopes, rarely flooded | 6K | Well drained | B | Very limited | Somewhat limited |
| Mason silt loam, 0 to 1 percent slopes, rarely flooded | 6K | Moderately well drained | C | Very limited | Very limited |
| Cupco silt loam, 0 to 1 percent slopes, occasionally flooded | 6K | Very poorly drained | C/D | Very limited | Very limited |
| Oklared fine sandy loam, 0 to 3 percent slopes, occasionally flooded | 5K | Well drained | A | Very limited | Very limited |
| Kiomatia loamy fine sand, 0 to 3 percent slopes, occasionally flooded | 5K | Well drained | B | Very limited | Very limited |
| Shermore loam, 1 to 3 percent slopes | 5K | Somewhat poorly drained | D | Very limited | Very limited |
| Spiro silt loam, 3 to 5 percent slopes | 5K | Well drained | C | Very limited | Very limited |
| Vian silt loam, 1 to 3 percent slopes | 4K | Somewhat poorly drained | C | Very limited | Very limited |
| Stigler silt loam, 0 to 1 percent slopes | 3K | Moderately well drained | D | Very limited | Very limited |
What This Means
Building & Foundations
About 93% 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 92% 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
Drainage is generally favorable for gardening. Adding compost and mulch will improve fertility and water retention. Test your soil's pH before planting — most vegetables prefer 6.0-7.0.