Great Smoky Mountains National Park, Tennessee and North Carolina

Survey Area TN640 Tennessee

The dominant drainage class is Well drained and the dominant hydrologic group is B (moderate infiltration). 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 Great Smoky Mountains National Park, Tennessee and North Carolina.

Soil Map UnitAcresDrainageHydro GroupDwellingsSeptic
Soco-Stecoah complex, 30 to 95 percent slopes, stony 144K Well drainedBVery limitedVery limited
Ditney-Unicoi complex, 30 to 95 percent slopes, very rocky 70K Well drainedBVery limitedVery limited
Breakneck-Pullback complex, 50 to 95 percent slopes, very rocky 28K Well drainedCVery limitedVery limited
Junaluska-Tsali complex, 30 to 95 percent slopes 27K Well drainedCVery limitedVery limited
Breakneck-Pullback complex, 30 to 50 percent slopes, very rocky 26K Well drainedCVery limitedVery limited
Luftee-Anakeesta, very stony-Rock outcrop complex, 50 to 95 percent slopes 25K Well drainedBVery limitedVery limited
Spivey-Santeetlah complex, 30 to 50 percent slopes, very stony 21K Well drainedAVery limitedVery limited
Spivey-Santeetlah complex, 15 to 30 percent slopes, very stony 21K Well drainedAVery limitedVery limited
Cataska-Sylco complex, 30 to 95 percent slopes, very rocky 18K Excessively drainedDVery limitedVery limited
Oconaluftee-Guyot-Cataloochee complex, 30 to 50 percent slopes, stony 16K Well drainedAVery limitedVery limited
Junaluska-Brasstown complex, 30 to 50 percent slopes, stony 13K Well drainedCVery limitedVery limited
Heintooga-Chiltoskie, bouldery-Rubble land complex, 30 to 50 percent slopes 11K Well drainedAVery limitedVery limited
Spivey-Santeetlah-Nowhere complex, 8 to 15 percent slopes, very stony 10K Well drainedAVery limitedVery limited
Cheoah channery loam, 30 to 95 percent slopes, stony 7K Well drainedAVery limitedVery limited
Junaluska-Brasstown complex, 15 to 30 percent slopes, stony 7K Well drainedCVery limitedVery limited
Soco-Stecoah complex, 15 to 30 percent slopes, stony 6K Well drainedBVery limitedVery limited
Junaluska-Tsali complex, 15 to 30 percent slopes 6K Well drainedCVery limitedVery limited
Ditney-Unicoi complex, 15 to 30 percent slopes, very rocky 6K Well drainedBVery limitedVery limited
Soco-Stecoah complex, 30 to 95 percent slopes, stony, windswept 6K Well drainedBVery limitedVery limited
Breakneck-Pullback complex, 15 to 30 percent slopes, very rocky 5K Well drainedCVery limitedVery limited

What This Means

Building & Foundations

About 100% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes. 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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