Unicoi County, TN Contractor directory
Excavation contractors in Unicoi County, TN
1 verified excavating and site work contractor serving Unicoi County.
County excavation guide
Ground conditions and project requirements in Unicoi County
Use this local research to understand soil, seasonal constraints, permits, and jobsite logistics before choosing a contractor.
Skip to 1 contractorSoil Regime ProfileEPA Ecoregion 66 (Blue Ridge Mountains)
Appalachian Colluvium & Mountain Slopes
Dominant Soil Order: Inceptisols / Spodosols
Parent Material: Colluvial and Residual Debris from Metasedimentary Sandstone, Quartzite & Gneiss
Mountain dirt work in the Southern Appalachians is governed by steep slopes (frequently exceeding 20 to 35 percent) and deep, heterogeneous colluvial deposits composed of loose boulder nests, cobbles, and unsorted loamy debris. Cut slopes are highly susceptible to rotational failure and debris slides if excavated without proper geotechnical benching and slope reinforcement. Hard, crystalline quartzite and granitic gneiss bedrock frequently require pneumatic hammer work or drilling and blasting for site terracing, driveway grading, and foundation footings. Access for heavy iron is constrained by switchbacks and narrow haul roads. Strict environmental permitting and sediment containment measures (super-silt fencing, sediment traps) are vigorously enforced near high-quality mountain streams and trout waters.
Geographic Footprint:Western North Carolina (Buncombe, Haywood, Jackson), Eastern Tennessee (Sevier, Blount)
Geotechnical Baseline
Physical Ground Conditions & Soil Properties
Shallow Bedrock (<50 in)
59.9%of county land area
High likelihood of bedrock refusal; hammer / ripper required for deep utilities.
High Shrink-Swell Clay
0.0%expansive soil
Low volumetric expansion risk in native subgrade.
Median Water Table Depth
45inches from surface
Moderate depth; seasonal wet perched water tables possible in spring.
Hydric / Wetland Soils
0.0%hydric coverage
Indicates poor natural drainage and potential jurisdictional wetland pockets.
Steep Terrain (Slope >15%)
89.0%of terrain
Mountain/hilly terrain; terracing, benching, and tracked haulers frequent.
Septic Severe Limitations
97.7%severe rate
High rate of conventional drainfield limitations; engineered or drip systems often required.
Dominant Soil Textures:LoamSandy loamSilt loam
Surface Stones / Boulders: 84.2% coverage
Compliance & Permitting
Earthwork Regulations & Permit Thresholds
Stormwater & Erosion Control
TDEC NPDES Construction General Permit TNR100000 (1+ acre disturbance); SWPPP and NOI required before clearing
Administers NPDES stormwater discharge coverage for land-disturbing construction activities.
State Threshold:1.00 Acre
Local Threshold:Follows state
Grading Permit: Required locally
Onsite Wastewater & Utilities
TDEC Division of Water Resources , Unicoi County Environmental Field Office
Jurisdiction over septic tank permits, soil evaluation perk tests, and drainfield sizing.
Housing on Septic:55.0%
Soil Evaluation:Site evaluation by TDEC-approved soil consultant (soil profile + morphology per Rule 0400-48-01); perc tests not accepted
811 One-Call Requirements
Tennessee 811
Mandatory notice window: 72 hours prior to mechanized earthwork (excluding weekends and legal holidays).
Licensing & Clearing Permits
Contractor License Threshold: Required for earthwork contracts exceeding $50,000 in Tennessee.
Burn Permit Season: Free burn permit required Oct 15 – May 15 statewide; check daily permit status by phone or BurnSafeTN.orgAuthority: Tennessee Department of Agriculture Division of Forestry (BurnSafeTN.org); TDEC open-burning rules also apply
Weather & Ecology
Seasonal Constraints & Clearing Windows
Design Frost Depth
12inches
Building code minimum depth for footing frost protection.
Frozen Ground Days
0days / year
Typical days with sub-freezing soil conditions affecting digging.
Wet Season Months
June, July
Peak precipitation window requiring sediment traps and soil aeration.
Supply Chain & Hazards
Logistics, Aggregate Sources & Geohazards
Aggregate & Material Supply
Unicoi Quarry
Nearest active quarry: 8.3 miles haul distance.(26 active crushed stone/sand operations within 50 miles).
Flood & Hazard Overlay
FEMA 100-Yr Flood:1.9%(100% NFHL digital map coverage)
NWI Wetlands:3.3%jurisdictional coverage
Karst Terrain & Sinkhole Risk: Present
22.5% of county underlain by soluble carbonate rock formations.
HUC8 Primary Watersheds:Watauga, North Carolina, Tennessee, Nolichucky
Public conservation land: 24.7% (USGS PAD-US).
Area-specific FAQ
Do I need to call before digging in Unicoi County?
Yes. You should contact Tennessee 811 at least 2 working days before any digging so underground lines can be marked.
How deep do footings need to be in Tennessee?
In Tennessee, footings typically need to extend below the frost line, which is around 12 inches here. A local contractor will confirm the code requirement for your site.
Verified local listings
Excavation contractors serving Unicoi County
1 verified listing