Polk County, Tennessee

Survey Area TN139 Tennessee

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 Polk County, Tennessee.

Soil Map UnitAcresDrainageHydro GroupDwellingsSeptic
Junaluska fine sandy loam, 35 to 65 percent slopes 49K Well drainedCVery limitedVery limited
Junaluska-Brasstown complex, 15 to 35 percent slopes 16K Well drainedCVery limitedVery limited
Tusquitee loam, 20 to 65 percent slopes 15K Well drainedAVery limitedVery limited
Evard-Hayesville complex, 15 to 30 percent slopes 15K Well drainedBVery limitedVery limited
Junaluska-Citico complex, 35 to 65 percent slopes 12K Well drainedCVery limitedVery limited
Junaluska-Tsali complex, 35 to 65 percent slopes 12K Well drainedCVery limitedVery limited
Waynesboro loam, 6 to 15 percent slopes, eroded 9K Well drainedBSomewhat limitedSomewhat limited
Evard-Hayesville complex, 5 to 15 percent slopes 8K Well drainedBSomewhat limitedSomewhat limited
Apison-Armuchee complex, 5 to 12 percent slopes, eroded 7K Well drainedCSomewhat limitedVery limited
Ditney loam, 35 to 65 percent slopes 7K Well drainedBVery limitedVery limited
Citico channery silt loam, 15 to 35 percent slopes 6K Well drainedBVery limitedVery limited
Cataska-Rock outcrop complex, 35 to 65 percent slopes 5K Excessively drainedDVery limitedVery limited
Lostcove-Keener complex, 25 to 65 percent slopes, very stony 5K Well drainedBVery limitedVery limited
Wallen channery sandy loam, 15 to 65 percent slopes 5K Somewhat excessively drainedBVery limitedVery limited
Cataska-Rock outcrop complex, 65 to 90 percent slopes 5K Excessively drainedDVery limitedVery limited
Unicoi-Rock outcrop complex, 35 to 65 percent slopes 5K Very limitedVery limited
Gullied land-Evard complex, 15 to 30 percent slopes 5K Very limitedVery limited
Jeffrey channery loam, 35 to 65 percent slopes 5K Well drainedBVery limitedVery limited
Lostcove-Keener complex, 12 to 25 percent slopes, very stony 4K Well drainedBVery limitedVery limited
Hamblen silt loam, 0 to 2 percent slopes, occasionally flooded, hydric minor component 4K Moderately well drainedB/DVery limitedVery limited

What This Means

Building & Foundations

About 87% 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 91% 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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