Lincoln 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 Lincoln County, Oklahoma.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Darnell-Stephenville complex, 3 to 12 percent slopes | 118K | Excessively drained | D | Very limited | Very limited |
| Darnell-Stephenville complex, 3 to 12 percent slopes, severely eroded | 65K | Excessively drained | D | Very limited | Very limited |
| Coyle and Seminole soils, 3 to 5 percent slopes, severely eroded | 49K | Well drained | C | Somewhat limited | Very limited |
| Renthin-Grainola complex, 3 to 5 percent slopes, severely eroded | 45K | Well drained | D | Very limited | Very limited |
| Grainola-Ironmound complex, 5 to 15 percent slopes | 35K | Well drained | D | Very limited | Very limited |
| Pulaski fine sandy loam, 0 to 1 percent slopes, occasionally flooded | 26K | Well drained | A | Very limited | Very limited |
| Stephenville fine sandy loam, 3 to 5 percent slopes | 22K | Well drained | C | Somewhat limited | Very limited |
| Grainola-Ashport, frequently flooded, complex, 0 to 12 percent slopes | 20K | Well drained | D | Somewhat limited | Very limited |
| Easpur loam, 0 to 1 percent slopes, occasionally flooded | 19K | Well drained | A | Very limited | Very limited |
| Renthin silty clay loam, 3 to 5 percent slopes, eroded | 17K | Well drained | D | Very limited | Very limited |
| Seminole loam, 3 to 5 percent slopes, eroded | 14K | Moderately well drained | C/D | Very limited | Very limited |
| Coyle loam, 3 to 5 percent slopes, eroded | 13K | Well drained | C | Somewhat limited | Very limited |
| Ashport clay loam, 0 to 1 percent slopes, occasionally flooded | 10K | Well drained | B | Very limited | Very limited |
| Stephenville fine sandy loam, 3 to 5 percent slopes, moderately eroded | 10K | Well drained | C | Somewhat limited | Very limited |
| Masham-Lucien complex, 5 to 20 percent slopes | 9K | Well drained | D | Very limited | Very limited |
| Dougherty loamy fine sand, 3 to 8 percent slopes | 9K | Well drained | B | Not limited | Very limited |
| Ashport, Port and Pulaski soils, 0 to 1 percent slopes, frequently flooded | 8K | Well drained | B | Very limited | Very limited |
| Stephenville fine sandy loam, 1 to 3 percent slopes | 8K | Well drained | C | Somewhat limited | Very limited |
| Harrah fine sandy loam, 5 to 8 percent slopes | 7K | Well drained | B | Not limited | Very limited |
| Tribbey fine sandy loam, 0 to 1 percent slopes, frequently flooded | 7K | Somewhat poorly drained | B | Very limited | Very limited |
What This Means
Building & Foundations
About 72% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 100% 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.