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Inyo County, CA Contractor directory
Excavation contractors in Inyo County, CA
1 verified excavating and site work contractor serving Inyo County.
County excavation guide
Ground conditions and project requirements in Inyo County
Use this local research to understand soil, seasonal constraints, permits, and jobsite logistics before choosing a contractor.
Skip to 1 contractorSoil Regime ProfileEPA Ecoregion 79, 81 (Mojave Basin and Range, Sonoran Basin and Range)
Arizona Basin-and-Range Desert Pavement & Caliche
Dominant Soil Order: Aridisols / Entisols
Parent Material: Alluvial Fans and Basin Fill with Caliche Hardpan, Residual Bedrock Ridges
Arizona's Basin-and-Range valleys are excavator country with caveats: the upper profile is loose desert alluvium, loams, sandy loams, and gravelly fan deposits that rip and load fast, but production stops at the caliche. Cemented calcium carbonate hardpans (calcic horizons) run from 12 to 36 inches below grade across the valley floors, ranging from a tooth-scoring rind to continuous pavement that demands a ripper tooth, hydraulic hammer, or hoe-ram work. Excavators plan unit costs around caliche percentage, not depth. Desert pavement and armored fan surfaces slow the first pass; deeper cuts in the basin fill stay vertical surprisingly well in dry conditions but slake and ravel when wet. Groundwater is deep and rarely a dewatering problem, which is the region's one gift to utility crews. Monsoon-season flash flooding fills open trenches in minutes, shoring, spoil setbacks, and daily weather calls are standard. Export fill and aggregate borrow are abundant; expect long hauls only for select material.
Geographic Footprint:SW and south-central AZ: Maricopa, Pima, Pinal, Yuma, La Paz, Mohave, Cochise valleys
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
0.0%expansive soil
Low volumetric expansion risk in native subgrade.
Median Water Table Depth
39inches 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%)
57.1%of terrain
Mountain/hilly terrain; terracing, benching, and tracked haulers frequent.
Septic Severe Limitations
87.7%severe rate
High rate of conventional drainfield limitations; engineered or drip systems often required.
Dominant Soil Textures:Fine sandy loamLoamLoamy sand
Surface Stones / Boulders: 41.3% 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
Inyo 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
February, July, August
Peak precipitation window requiring sediment traps and soil aeration.
Supply Chain & Hazards
Logistics, Aggregate Sources & Geohazards
Aggregate & Material Supply
Hiatt Ready Mix Inc.
Nearest active quarry: 16.6 miles haul distance.(2 active crushed stone/sand operations within 50 miles).
Flood & Hazard Overlay
FEMA 100-Yr Flood:1.5%(100% NFHL digital map coverage)
NWI Wetlands:7.3%jurisdictional coverage
Karst Terrain & Sinkhole Risk: Low
13.6% of county underlain by soluble carbonate rock formations.
HUC8 Primary Watersheds:Southern Big Smoky Valley, Ralston-Stone Cabin Valleys, Cactus-Sarcobatus Flats, Fish Lake-Soda Spring Valleys, Upper Kern, Upper Kaweah
Public conservation land: 100.0% (USGS PAD-US).
Area-specific FAQ
Do I need to call before digging in Inyo 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 Inyo County
1 verified listing