Washington County, TX Contractor directory

Excavation contractors in Washington County, TX

1 verified excavating and site work contractor serving Washington County.

County excavation guide

Ground conditions and project requirements in Washington 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 34, 75 (Western Gulf Coastal Plain, Southern Coastal Plain)

Gulf Coast Flatwoods & Deltaic Clay

Dominant Soil Order: Alfisols / Vertisols
Parent Material: Quaternary Coastal Deltaic Clay, Silt, and Low-gradient Marine Sand

The Gulf Coast flatwoods and deltaic corridor are defined by low relief, slow surface runoff, and high groundwater tables that often sit within 1 to 3 feet of the surface. Subgrade soils consist of heavy, fat clays (Lake Charles and Beaumont series) with severe shrink-swell characteristics and low unconfined compressive strength. Detention pond excavation, mass drainage ditching, and pump stations represent a huge portion of site earthwork. Saturated ground conditions require the use of wide low-ground-pressure (LGP) tracks and timber crane mats to prevent sinkage. Trenching for deep utilities requires continuous sheet piling or trench shoring combined with well-point dewatering to manage high hydraulic inflow and sand boiling.

Geographic Footprint:Coastal Texas (Harris, Galveston, Jefferson, Brazoria), Coastal Alabama (Mobile, Baldwin)
Geotechnical Baseline

Physical Ground Conditions & Soil Properties

Shallow Bedrock (<50 in)
17.6%of county land area

Moderate rock encounters along ridges and upper slope shoulders.

High Shrink-Swell Clay
39.0%expansive soil

Severe expansive clay; pad lime stabilization or undercut replacement typically required.

Median Water Table Depth
12inches from surface

Shallow water table; active dewatering or sumps needed for deep trenching.

Hydric / Wetland Soils
0.9%hydric coverage

Indicates poor natural drainage and potential jurisdictional wetland pockets.

Steep Terrain (Slope >15%)
0.1%of terrain

Predominantly gentle to rolling slopes suitable for wheeled earthmoving.

Septic Severe Limitations
73.5%severe rate

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

Dominant Soil Textures:ClayFine sandy loamClay loam
Surface Stones / Boulders: 15.6% coverage
Compliance & Permitting

Earthwork Regulations & Permit Thresholds

Stormwater & Erosion Control
TCEQ Construction General Permit TXR150000 (Notice of Intent required ≥1 acre; SWPPP required)

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

State Threshold:1.00 Acre
Local Threshold:Follows state
Grading Permit: No separate county grading permit
Onsite Wastewater & Utilities
Washington County permitting authority / TCEQ Region Office

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

Housing on Septic:55.0%
Soil Evaluation:Site evaluation by licensed site evaluator; system design per 30 TAC Chapter 285 (soil analysis, absorption capacity)
Access Septic Permitting Portal →
811 One-Call Requirements
Texas 811

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

Licensing & Clearing Permits
Contractor License Threshold: Required for earthwork contracts exceeding $0 in Texas.
Burn Permit Season: Outdoor burning allowed sunrise–sunset except TCEQ-declared high-pollution-advisory days; county burn bans common Jun–SepAuthority: TCEQ outdoor burning rules (30 TAC 111) + county burn bans by Commissioners Court
Weather & Ecology

Seasonal Constraints & Clearing Windows

Design Frost Depth
0inches

Building code minimum depth for footing frost protection.

Supply Chain & Hazards

Logistics, Aggregate Sources & Geohazards

Aggregate & Material Supply
Flood & Hazard Overlay
FEMA 100-Yr Flood:17.6%(0% NFHL digital map coverage)
NWI Wetlands:6.0%jurisdictional coverage
Karst Terrain & Sinkhole Risk: Low

0.0% of county underlain by soluble carbonate rock formations.

HUC8 Primary Watersheds:Lower Brazos-Little Brazos, Yegua, Lower Brazos, Lower Colorado-Cummins
Public conservation land: 0.0% (USGS PAD-US).

Area-specific FAQ

Do I need to call before digging in Washington County?

Yes. You should contact Texas 811 at least 2 working days before any digging so underground lines can be marked.

How deep do footings need to be in Texas?

In Texas, 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.

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Excavation contractors serving Washington County

1 verified listing