Franklin County, Indiana

Survey Area IN047 Indiana

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 Franklin County, Indiana.

Soil Map UnitAcresDrainageHydro GroupDwellingsSeptic
Eden flaggy silty clay, 25 to 50 percent slopes 24K Well drainedDVery limitedVery limited
Cincinnati silt loam, 6 to 12 percent slopes, severely eroded 15K Well drainedDVery limitedVery limited
Fincastle silt loam, New Castle Till Plain, 0 to 2 percent slopes 13K Somewhat poorly drainedB/DVery limitedVery limited
Avonburg silt loam, 0 to 2 percent slopes 13K Somewhat poorly drainedC/DVery limitedVery limited
Nabb silt loam, 2 to 6 percent slopes, eroded 12K Moderately well drainedC/DVery limitedVery limited
Bonnell clay loam, 12 to 22 percent slopes, severely eroded 11K Well drainedCVery limitedVery limited
Miami clay loam, 6 to 12 percent slopes, severely eroded 10K Moderately well drainedCVery limitedVery limited
Bonnell silt loam, 18 to 25 percent slopes, eroded 10K Well drainedCVery limitedVery limited
Bonnell silt loam, 12 to 18 percent slopes, eroded 9K Well drainedCVery limitedVery limited
Eden flaggy silty clay, 15 to 25 percent slopes, eroded 9K Well drainedDVery limitedVery limited
Cincinnati silt loam, 2 to 6 percent slopes, eroded 9K Well drainedCSomewhat limitedVery limited
Xenia silt loam, 2 to 6 percent slopes, eroded 9K Moderately well drainedB/DVery limitedVery limited
Cyclone silt loam, 0 to 2 percent slopes 8K Poorly drainedB/DVery limitedVery limited
Cincinnati silt loam, 6 to 12 percent slopes, eroded 7K Well drainedCVery limitedVery limited
Russell silt loam, 2 to 6 percent slopes, eroded 6K Well drainedBSomewhat limitedVery limited
Cobbsfork silt loam, 0 to 1 percent slopes 6K Poorly drainedC/DVery limitedVery limited
Miami silt loam, 2 to 6 percent slopes, eroded 6K Moderately well drainedCVery limitedVery limited
Fincastle-Reesville silt loams, 0 to 1 percent slopes 5K Somewhat poorly drainedC/DVery limitedVery limited
Gessie loam, sandy substratum, occasionally flooded 5K Well drainedBVery limitedVery limited
Dearborn loam, frequently flooded 5K Well drainedBVery limitedVery limited

What This Means

Building & Foundations

About 92% 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 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

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.

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