Coryell County, TX Contractor directory

Excavation contractors in Coryell County, TX

10 verified excavating and site work contractors serving Coryell County.

County excavation guide

Ground conditions and project requirements in Coryell 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 30 (Edwards Plateau)

Edwards Plateau & Hill Country Shallow Limestone

Dominant Soil Order: Mollisols / Inceptisols

Parent Material: Cretaceous Hard Limestone, Dolomite, and Indurated Caliche Beds

The Edwards Plateau and Texas Hill Country regime feature very shallow, stony, dark calcareous clays (Tarrant and Brackett series) mantling dense, bedded Cretaceous limestone and thick, impenetrable caliche hardpans. Topsoil depths are often under 12 inches, with solid limestone bedrock or cemented caliche exposed at the surface. Earthmoving contractors rely heavily on heavy excavators equipped with 5,000-to-10,000 ft-lb hydraulic breakers, rock trenchers, and ripper-equipped D8/D9 dozers. Land clearing involves shearing and mulching dense Ashe juniper (cedar) and using heavy root rakes to separate vegetation from the rocky ground surface without hauling excessive rock to off-site disposal facilities.

Geographic Footprint:Central Texas Hill Country (Kerr, Gillespie, Hays, Kendall, Blanco, Travis)

Geotechnical Baseline

Physical Ground Conditions & Soil Properties

Shallow Bedrock (<50 in)

53.5%of county land area

High likelihood of bedrock refusal; hammer / ripper required for deep utilities.

High Shrink-Swell Clay

18.1%expansive soil

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

Median Water Table Depth

48inches from surface

Deep water table; dry trenching conditions under normal weather.

Hydric / Wetland Soils

0.0%hydric coverage

Indicates poor natural drainage and potential jurisdictional wetland pockets.

Steep Terrain (Slope >15%)

7.7%of terrain

Predominantly gentle to rolling slopes suitable for wheeled earthmoving.

Septic Severe Limitations

80.9%severe rate

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

Dominant Soil Textures:Clay loamSilty claySilty clay loam

Surface Stones / Boulders: 39.4% 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

Coryell 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:9.2%(0% NFHL digital map coverage)

NWI Wetlands:5.0%jurisdictional coverage

Karst Terrain & Sinkhole Risk: Low

29.5% of county underlain by soluble carbonate rock formations.

HUC8 Primary Watersheds:Bosque, Leon, Cowhouse, Lampasas

Public conservation land: 0.0% (USGS PAD-US).

Area-specific FAQ

Do I need to call before digging in Coryell 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.