Excavation contractors in Smith County, MS

4 verified excavating and site work contractors serving Smith County.

County excavation guide

Ground conditions and project requirements in Smith County

Use this local research to understand soil, seasonal constraints, permits, and jobsite logistics before choosing a contractor.

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Soil Regime ProfileEPA Ecoregion 73, 74, 65 (Mississippi Alluvial Plain, Mississippi Valley Loess Plains, Southeastern Plains)

Mississippi Yazoo Alluvium, Black Prairie & Pine Hills

Dominant Soil Order: Vertisols / Alfisols / Ultisols / Inceptisols

Parent Material: Mississippi River Alluvial Clay and Silt (Yazoo Delta), Calcareous Black Prairie Smectite Clay, and Gulf Coastal Plain Sandy and Clayey Sediments

Mississippi is the wet-clay end of the Deep South. The Yazoo Delta (the Delta counties from Memphis to Vicksburg) is Mississippi River alluvium: deep silty clay and clay that digs easily when dry and turns to genuine gumbo when wet, hydric soils on 40-60 percent of land, water tables within inches of grade in spring, and the strongest shrink-swell in the region (smectite clays that crack deeply in summer drought). Utility work here is a seasonal race, and septic systems are commonly engineered (aerobic units, low-pressure dosing) because conventional trenches fail in the alluvial clay. The Black Prairie belt (Columbus, Starkville, Aberdeen) carries calcareous smectite clay over Selma Group chalk: high shrink-swell again, with shallow chalk bedrock in places. The Pine Hills and Red Hills (Jackson, Hattiesburg south and east) are the easy half: sandy loam and sandy clay over Gulf Coastal Plain sediments, low shrink-swell, gentle slopes, and conventional septic systems standard. Loess bluffs line the Delta's eastern edge. Frost is essentially absent; hurricane rainfall loads drive drainage design.

Geographic Footprint:Mississippi's counties (Jackson, Gulfport, Hattiesburg, Tupelo, the Delta) split between alluvial gumbo (the Delta and Black Prairie: seasonal wet, high shrink-swell, engineered septic) and the sandy Pine Hills (easy digging, conventional systems). Water management is the trade's constant.

Geotechnical Baseline

Physical Ground Conditions & Soil Properties

Shallow Bedrock (<50 in)

0.0%of county land area

Deep soil mantle; rock refusal rare for standard basement or trench cuts.

High Shrink-Swell Clay

0.3%expansive soil

Low volumetric expansion risk in native subgrade.

Median Water Table Depth

24inches from surface

Moderate depth; seasonal wet perched water tables possible in spring.

Hydric / Wetland Soils

9.2%hydric coverage

Indicates poor natural drainage and potential jurisdictional wetland pockets.

Steep Terrain (Slope >15%)

17.1%of terrain

Predominantly gentle to rolling slopes suitable for wheeled earthmoving.

Septic Severe Limitations

85.9%severe rate

High rate of conventional drainfield limitations; engineered or drip systems often required.

Dominant Soil Textures:Fine sandy loamSilt loamSandy loam

Surface Stones / Boulders: 0.0% coverage

Compliance & Permitting

Earthwork Regulations & Permit Thresholds

Stormwater & Erosion Control

MDEQ Large Construction Storm Water General Permit (MSR10), reissued Feb 4 2022, expires Jan 31 2027; 5 acres or more (or part of larger plan of 5 acres or more). Sites of 1 to under 5 acres fall under the separate MDEQ Small Construction General Permit (permit number not verified).

Administers NPDES stormwater discharge coverage for land-disturbing construction activities.

State Threshold:1.00 Acre

Local Threshold:Follows state

Onsite Wastewater & Utilities

Mississippi State Department of Health

Jurisdiction over septic tank permits, soil evaluation perk tests, and drainfield sizing.

Housing on Septic:55.0%

Soil Evaluation:Soil and site evaluation (soil auger to 5 ft, "perk test") before permit recommendation; permit valid 2 years

811 One-Call Requirements

Mississippi 811

Mandatory notice window: 48 hours prior to mechanized earthwork (excluding weekends and legal holidays).

Licensing & Clearing Permits