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Imperial County, CA Contractor directory
Excavation contractors in Imperial County, CA
3 verified excavating and site work contractors serving Imperial County.
County excavation guide
Ground conditions and project requirements in Imperial County
Use this local research to understand soil, seasonal constraints, permits, and jobsite logistics before choosing a contractor.
Skip to 3 contractorsSoil 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)
0.0%of county land area
Deep soil mantle; rock refusal rare for standard basement or trench cuts.
High Shrink-Swell Clay
22.5%expansive soil
Moderate shrink-swell; verify plasticity index on structural fill.
Median Water Table Depth
36inches 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%)
0.6%of terrain
Predominantly gentle to rolling slopes suitable for wheeled earthmoving.
Septic Severe Limitations
97.7%severe rate
High rate of conventional drainfield limitations; engineered or drip systems often required.
Dominant Soil Textures:Silty clay loamSilty clayFine sand
Surface Stones / Boulders: 0.0% coverage
Compliance & Permitting
Earthwork Regulations & Permit Thresholds
Stormwater & Erosion Control
SWRCB Construction General Permit Order 2009-0009-DWQ (as amended; NOI + SWPPP required ≥1 acre; LRP applies)
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
Imperial County Environmental Health / Regional Water Quality Control Board
Jurisdiction over septic tank permits, soil evaluation perk tests, and drainfield sizing.
Housing on Septic:55.0%
Soil Evaluation:OWTS Policy + county OWTS management plan: site/soil evaluation by licensed professional; percolation testing per county LAMP
811 One-Call Requirements
USA North 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 California.
Burn Permit Season: Residential pile burning generally Nov–May (per-burn day authorization by local AQMD/CAL FIRE unit); Jun–Oct bans commonAuthority: CAL FIRE / county Air Pollution Control District burn permits; no-burn days by AQI forecast
Weather & Ecology
Seasonal Constraints & Clearing Windows
Design Frost Depth
0inches
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
January, February, October, December
Peak precipitation window requiring sediment traps and soil aeration.
Supply Chain & Hazards
Logistics, Aggregate Sources & Geohazards
Aggregate & Material Supply
El Centro Aggregate
Nearest active quarry: 14.6 miles haul distance.(3 active crushed stone/sand operations within 50 miles).
Flood & Hazard Overlay
FEMA 100-Yr Flood:7.4%(100% NFHL digital map coverage)
NWI Wetlands:9.1%jurisdictional coverage
Karst Terrain & Sinkhole Risk: Low
0.0% of county underlain by soluble carbonate rock formations.
HUC8 Primary Watersheds:Salton Sea, Carrizo Creek, San Felipe Creek, Cottonwood-Tijuana, Lower Colorado, Imperial Reservoir
Public conservation land: 55.7% (USGS PAD-US).
Area-specific FAQ
Do I need to call before digging in Imperial County?
Yes. You should contact USANorth / California 811 at least 2 working days before any digging so underground lines can be marked.
How deep do footings need to be in California?
In California, footings typically need to extend below the frost line, which is around 18 inches here. A local contractor will confirm the code requirement for your site.
Verified local listings
Excavation contractors serving Imperial County
3 verified listings