Le Flore County, Oklahoma
The most common soil here is Carnasaw, on about 22% of the land: a loam, a balanced mix that crumbles in your hand. Bengal and Pirum come next.
About 70% of the land drains well, and 3% stays wet for long stretches; groundwater comes within two feet of the surface under 23% of it.
USDA rates 94% of the land very limited for a standard septic drain field, and 93% very limited for homes with basements. That means extra cost or special design, not that it can't be done.
Worth knowing: 17% of the land floods occasionally or more, and bedrock lies within 40 inches under 39% of it.
Soils change over short distances, so look up an address below for the soil at that exact spot and the reasons behind each rating.
The soils you're most likely standing on
The biggest named soils in Le Flore County, Oklahoma, each drawn five feet deep from its official USDA description, in its recorded colors.
Dots mark gravel; white flecks mark lime. Shares are by acres across the survey area, and each mapped patch usually mixes several of these soils.
The biggest mapped areas
The dominant drainage class is Well drained and the dominant hydrologic group is C (slow infiltration, moderate runoff). The most common soil order is Ultisols — strongly weathered soils with clay-enriched subsoils, common in warm humid climates. 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 Le Flore County, Oklahoma. Search your address to find the exact soil composition, drainage, and series details at your specific location.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Carnasaw stony loam, 15 to 35 percent slopes, extremely stony | 70K | Well drained | C | Very limited | Very limited |
| Carnasaw stony loam, 4 to 15 percent slopes | 66K | Well drained | C | Very limited | Very limited |
| Carnasaw-Pirum complex, 15 to 35 percent slopes | 63K | Well drained | C | Very limited | Very limited |
| Bengal-Clebit association, 3 to 15 percent | 58K | Well drained | C | Very limited | Very limited |
| Neff silt loam, 0 to 1 percent slopes, occasionally flooded | 53K | Moderately well drained | C | Very limited | Very limited |
| Stigler silt loam, 1 to 3 percent slopes | 49K | Moderately well drained | D | Very limited | Very limited |
| Pirum-Octavia-Panama association, 30 to 50 percent slopes | 38K | Well drained | C | Very limited | Very limited |
| Kenn-Ceda complex, 0 to 2 percent slopes, occasionally flooded | 36K | Well drained | B | Very limited | Very limited |
| Bengal-Octavia-Tuskahoma complex, 4 to 20 percent slopes | 36K | Well drained | C | Very limited | Very limited |
| Bengal-Pirum-Clebit complex, 5 to 15 percent slopes | 34K | Well drained | D | Very limited | Very limited |
| Neff and Rexor soils, 0 to 1 percent slopes, frequently flooded | 30K | Moderately well drained | C/D | Very limited | Very limited |
| Carnasaw-Octavia complex, 15 to 35 percent slopes, very rocky | 28K | Well drained | C | Very limited | Very limited |
| Wister silt loam, 1 to 3 percent slopes | 25K | Moderately well drained | D | Very limited | Very limited |
| Sherless-Bengal complex, 3 to 15 percent slopes | 24K | Well drained | C | Somewhat limited | Very limited |
| Carnasaw-Clebit complex, 5 to 15 percent slopes | 23K | Well drained | C | Very limited | Very limited |
| Carnasaw-Octavia complex, 35 to 50 percent slopes | 22K | Well drained | C | Very limited | Very limited |
| Pirum-Clebit complex, 3 to 5 percent slopes | 21K | Well drained | C | Very limited | Very limited |
| Pirum-Carnasaw-Caston complex, 35 to 60 percent slopes, cool | 20K | Well drained | C | Very limited | Very limited |
| Shermore fine sandy loam, 3 to 5 percent slopes, moderately eroded | 19K | Moderately well drained | C | Very limited | Very limited |
| Octavia-Carnasaw complex, 15 to 35 percent slopes, cool | 18K | Well drained | B | Very limited | Very limited |
Soil Orders in This Area
The USDA classifies every soil into one of 12 soil orders. Here are the dominant orders found in this survey area.
What This Means
Building & Foundations
About 93% 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 94% 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.