Jefferson County, Indiana
The most common soil here is Cobbsfork, on about 17% of the land: a silt loam, smooth, like flour. Eden and Cincinnati come next.
About 56% of the land drains well, and 30% stays wet for long stretches; groundwater comes within two feet of the surface under 43% of it.
USDA rates 92% of the land very limited for a standard septic drain field, and 85% very limited for homes with basements. That means extra cost or special design, not that it can't be done.
Worth knowing: 7% of the land floods occasionally or more, and bedrock lies within 40 inches under 18% 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 Jefferson County, Indiana, 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/D (varies with drainage). The most common soil order is Alfisols — moderately leached forest soils with a clay-enriched subsoil. 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 Jefferson County, Indiana. 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 |
|---|---|---|---|---|---|
| Cobbsfork silt loam, 0 to 1 percent slopes | 39K | Poorly drained | C/D | Very limited | Very limited |
| Eden flaggy silty clay, 25 to 50 percent slopes | 26K | Well drained | D | Very limited | Very limited |
| Avonburg silt loam, 0 to 2 percent slopes | 24K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Cincinnati silt loam, 2 to 6 percent slopes, eroded | 16K | Well drained | C | Somewhat limited | Very limited |
| Nabb silt loam, 2 to 6 percent slopes, eroded | 11K | Moderately well drained | C/D | Very limited | Very limited |
| Rossmoyne silt loam, 0 to 2 percent slopes | 10K | Moderately well drained | C/D | Very limited | Very limited |
| Cincinnati silt loam, 6 to 12 percent slopes, eroded | 10K | Well drained | C | Very limited | Very limited |
| Eden silty clay loam, 12 to 25 percent slopes, eroded | 8K | Well drained | D | Very limited | Very limited |
| Carmel silt loam, 6 to 12 percent slopes, eroded | 6K | Well drained | C | Very limited | Very limited |
| Ryker silt loam, 2 to 6 percent slopes, eroded | 5K | Well drained | B | Somewhat limited | Somewhat limited |
| Wirt silt loam, occasionally flooded | 5K | Well drained | B | Very limited | Very limited |
| Beasley-Rock outcrop complex, 12 to 25 percent slopes, severely eroded | 4K | Well drained | C | Very limited | Very limited |
| Ryker silt loam, 6 to 12 percent slopes, eroded | 4K | Well drained | B | Somewhat limited | Somewhat limited |
| Eden-Caneyville complex, 25 to 60 percent slopes | 4K | Well drained | D | Very limited | Very limited |
| Holton loam, occasionally flooded | 4K | Somewhat poorly drained | B/D | Very limited | Very limited |
| Caneyville-Rock outcrop complex, 25 to 60 percent slopes | 3K | Well drained | C | Very limited | Very limited |
| Hickory silt loam, 18 to 45 percent slopes | 3K | Well drained | B | Very limited | Very limited |
| Avonburg silt loam, 2 to 4 percent slopes, eroded | 3K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Grayford silt loam, 12 to 18 percent slopes, eroded | 3K | Well drained | B | Very limited | Very limited |
| Hickory silt loam, Muscatatuck Plateau, 12 to 18 percent slopes, eroded | 3K | 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 85% of soils are rated "very limited" for dwellings with basements. Specific challenges include 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
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.