Noble 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 Noble County, Oklahoma.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Grainola-Lucien complex, 5 to 12 percent slopes | 34K | Well drained | D | Somewhat limited | Very limited |
| Ashport, Port and Pulaski soils, 0 to 1 percent slopes, frequently flooded | 29K | Well drained | B | Very limited | Very limited |
| Norge silt loam, 1 to 3 percent slopes | 26K | Well drained | B | Somewhat limited | Somewhat limited |
| Renfrow and Grainola soils, 3 to 5 percent slopes, eroded | 25K | Well drained | D | Very limited | Very limited |
| Grainola-Masham-Lucien complex, 5 to 40 percent slopes, very bouldery | 22K | Well drained | D | Very limited | Very limited |
| Bethany silt loam, 1 to 3 percent slopes | 21K | Well drained | C | Somewhat limited | Very limited |
| Grainola-Ashport frequently flooded-Mulhall complex, 0 to 8 percent slopes | 21K | Well drained | B | Not rated | Very limited |
| Kirkland silt loam, 1 to 3 percent slopes | 19K | Well drained | D | Very limited | Very limited |
| Grainola-Lucien complex, 1 to 5 percent slopes | 18K | Well drained | D | Very limited | Very limited |
| Port silt loam, 0 to 1 percent slopes, occasionally flooded | 16K | Well drained | B | Very limited | Very limited |
| Renfrow silt loam, 1 to 3 percent slopes | 14K | Well drained | D | Very limited | Very limited |
| Norge silt loam, 3 to 5 percent slopes, eroded | 14K | Well drained | C | Somewhat limited | Very limited |
| Kirkland silt loam, 1 to 3 percent slopes, eroded | 12K | Well drained | D | Very limited | Very limited |
| Kirkland silt loam, 0 to 1 percent slopes, cool | 11K | Well drained | D | Very limited | Very limited |
| Grant-Huska complex, 1 to 5 percent slopes | 11K | Well drained | B | Somewhat limited | Somewhat limited |
| Renfrow silt loam, 3 to 5 percent slopes | 10K | Well drained | D | Very limited | Very limited |
| Bethany silt loam, 0 to 1 percent slopes | 8K | Well drained | C | Very limited | Very limited |
| Milan loam, 1 to 3 percent slopes | 8K | Well drained | C | Not limited | Very limited |
| Water | 8K | D | Not rated | Not rated | |
| Norge silt loam, 3 to 5 percent slopes | 7K | Well drained | B | Somewhat limited | Somewhat limited |
What This Means
Building & Foundations
About 55% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, 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
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.