Garvin County, Oklahoma
The dominant drainage class is Well drained and the dominant hydrologic group is C (slow infiltration, moderate 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 Garvin County, Oklahoma.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Renfrow silt loam, 3 to 5 percent slopes, eroded | 30K | Well drained | D | Somewhat limited | Very limited |
| Stephenville-Darnell complex, 5 to 20 percent slopes | 21K | Well drained | C | Very limited | Very limited |
| Clarita clay, 5 to 12 percent slopes, moderately eroded | 20K | Moderately well drained | C | Very limited | Very limited |
| Stephenville fine sandy loam, 3 to 5 percent slopes | 19K | Well drained | C | Somewhat limited | Very limited |
| Zaneis loam, 3 to 5 percent slopes, moderately eroded | 19K | Well drained | B | Somewhat limited | Somewhat limited |
| Clarita clay, 3 to 5 percent slopes, moderately eroded | 16K | Moderately well drained | C | Very limited | Very limited |
| Grainola clay loam, 5 to 20 percent slopes | 16K | Well drained | D | Very limited | Very limited |
| Stephenville and Newalla soils, 3 to 8 percent slopes, gullied | 16K | Well drained | C | Somewhat limited | Very limited |
| Teller fine sandy loam, 3 to 5 percent slopes, eroded | 16K | Well drained | B | Not limited | Very limited |
| Garvin silty clay loam, 0 to 1 percent slopes, occasionally flooded | 14K | Moderately well drained | C | Very limited | Very limited |
| Stephenville fine sandy loam, 3 to 5 percent slopes, moderately eroded | 14K | Well drained | C | Somewhat limited | Very limited |
| Port silt loam, 0 to 1 percent slopes, occasionally flooded | 13K | Well drained | B | Very limited | Very limited |
| Keokuk silt loam, 0 to 1 percent slopes, rarely flooded | 13K | Well drained | B | Very limited | Somewhat limited |
| Renfrow silt loam, 3 to 5 percent slopes, gullied | 12K | Well drained | D | Very limited | Very limited |
| Chigley gravelly sandy loam, 1 to 5 percent slopes | 12K | Moderately well drained | C | Somewhat limited | Very limited |
| Port and Pulaski soils, 0 to 1 percent slopes, frequently flooded | 11K | Well drained | B | Very limited | Very limited |
| Yahola fine sandy loam, 0 to 1 percent slopes, occasionally flooded | 11K | Well drained | A | Very limited | Very limited |
| Dale silt loam, 0 to 1 percent slopes, rarely flooded | 10K | Well drained | B | Very limited | Somewhat limited |
| Newalla fine sandy loam, 1 to 5 percent slopes | 9K | Moderately well drained | D | Very limited | Very limited |
| Chigley gravelly sandy loam, 5 to 12 percent slopes | 8K | Moderately well drained | C | Somewhat limited | Very limited |
What This Means
Building & Foundations
About 55% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 85% 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.