Grimes County, TX Contractor directory

Excavation contractors in Grimes County, TX

12 verified excavating and site work contractors serving Grimes County.

County excavation guide

Ground conditions and project requirements in Grimes 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 33 (East Central Texas Plains)

Post Oak Savannah Claypan & Loamy Uplands

Dominant Soil Order: Alfisols

Parent Material: Tertiary Sandy and Clayey Coastal Plain Sediments with Dense Clay Subsoils

The Post Oak Savannah regime is characterized by an abrupt textural transition: 6 to 18 inches of loose, permeable fine sandy loam directly overlying a dense, impermeable, smectitic clay subsoil (Lufkin and Tabor soil series). This dense claypan restricts water percolation and root penetration, creating severe perched water table conditions during wet seasons. Excavation equipment can break through the thin crust into saturated, soup-like clay beneath, resulting in severe rutting and immobilization. Pad cuts must be quickly protected from rainfall to avoid holding standing water in the impervious clay bowl. Sub-surface curtain drains, interceptor swales, and chemical lime treatment are essential for stabilizing subgrades prior to paving or building slab construction.

Geographic Footprint:East-Central Texas (Brazos, Robertson, Bastrop, Burleson)

Geotechnical Baseline

Physical Ground Conditions & Soil Properties

Shallow Bedrock (<50 in)

18.7%of county land area

Moderate rock encounters along ridges and upper slope shoulders.

High Shrink-Swell Clay

16.4%expansive soil

Moderate shrink-swell; verify plasticity index on structural fill.

Median Water Table Depth

24inches from surface

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

Hydric / Wetland Soils

3.5%hydric coverage

Indicates poor natural drainage and potential jurisdictional wetland pockets.

Steep Terrain (Slope >15%)

0.0%of terrain

Predominantly gentle to rolling slopes suitable for wheeled earthmoving.

Septic Severe Limitations

72.0%severe rate

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

Dominant Soil Textures:Fine sandy loamLoamy fine sandClay

Surface Stones / Boulders: 12.4% 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

Grimes 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:22.4%(0% NFHL digital map coverage)

NWI Wetlands:6.3%jurisdictional coverage

Karst Terrain & Sinkhole Risk: Low

0.0% of county underlain by soluble carbonate rock formations.

HUC8 Primary Watersheds:West Fork San Jacinto, Spring, Lower Brazos-Little Brazos, Navasota

Public conservation land: 3.9% (USGS PAD-US).

Area-specific FAQ

Do I need to call before digging in Grimes 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.