Avery County, North Carolina
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 Avery County, North Carolina.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Porters gravelly loam, 30 to 50 percent slopes, stony | 11K | Well drained | A | Very limited | Very limited |
| Crossnore-Jeffrey complex, 30 to 50 percent slopes, very stony | 9K | Well drained | B | Very limited | Very limited |
| Edneyville-Chestnut complex, granitic, 30 to 50 percent slopes, stony | 7K | Well drained | B | Very limited | Very limited |
| Unaka-Porters complex, 30 to 50 percent slopes, very rocky | 7K | Well drained | B | Very limited | Very limited |
| Edneytown-Pigeonroost complex, 15 to 30 percent slopes, stony | 6K | Well drained | C | Very limited | Very limited |
| Unaka-Porters complex, 50 to 95 percent slopes, very rocky | 6K | Well drained | B | Very limited | Very limited |
| Porters gravelly loam, 15 to 30 percent slopes, stony | 5K | Well drained | A | Very limited | Very limited |
| Burton-Craggey-Rock outcrop complex, windswept, 30 to 95 percent slopes | 5K | Well drained | B | Very limited | Very limited |
| Pineola gravelly loam, 15 to 30 percent slopes, stony | 5K | Well drained | C | Very limited | Very limited |
| Saunook-Thunder complex, 15 to 30 percent slopes, very stony | 5K | Well drained | B | Very limited | Very limited |
| Chestnut-Ashe complex, 30 to 50 percent slopes, very stony | 5K | Well drained | B | Very limited | Very limited |
| Chestnut-Buladean complex, central mountain, 30 to 50 percent slopes, stony | 5K | Well drained | B | Very limited | Very limited |
| Chandler-Micaville complex, 30 to 50 percent slopes, stony | 4K | Somewhat excessively drained | A | Very limited | Very limited |
| Chestnut-Ashe complex, 50 to 95 percent slopes, very stony | 4K | Well drained | B | Very limited | Very limited |
| Cullasaja cobbly loam, 15 to 30 percent slopes, extremely bouldery | 4K | Well drained | A | Very limited | Very limited |
| Saunook loam, central mountains, 8 to 15 percent slopes | 4K | Well drained | B | Somewhat limited | Somewhat limited |
| Cullasaja cobbly loam, 30 to 50 percent slopes, extremely bouldery | 4K | Well drained | A | Very limited | Very limited |
| Spivey cobbly loam, 15 to 30 percent slopes, extremely bouldery | 3K | Well drained | A | Very limited | Very limited |
| Soco-Ditney complex, 30 to 50 percent slopes, very stony | 3K | Well drained | B | Very limited | Very limited |
| Saunook loam, central mountains, 15 to 30 percent slopes, very stony | 3K | Well drained | B | Very limited | Very limited |
What This Means
Building & Foundations
About 96% of soils are rated "very limited" for dwellings with basements. Specific challenges include steep slopes. A geotechnical assessment is recommended before building.
Septic Systems
About 96% 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.