Excavation contractor jobsite in St. Clair County, MI

St. Clair County, MI Contractor directory

Excavation contractors in St. Clair County, MI

23 verified excavating and site work contractors serving St. Clair County.

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County excavation guide

Ground conditions and project requirements in St. Clair 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 56, 49, 48 (Northern Glaciated Allegheny Plateau - Manistee, Northern Lakes and Forests, Eastern Superior/Ups and Boreal)

Michigan Northern Sand Plains, Swamps & Great Lakes Shorelands

Dominant Soil Order: Entisols / Spodosols / Histosols
Parent Material: Glacial Outwash Sand and Ice-Contact Gravel with Peat, Muck and Lacustrine Silt over Limestone and Dolomite

Northern Michigan digs differently than the southern metros. Glacial outwash sand and gravel dominate: loamy sand, fine sand and loam cut quickly with an open bucket but stand nearly vertical for minutes only, so sloping, shoring and trench boxes are standard practice rather than a precaution. Hydric soils are the region's signature: peat and muck occupy former glacial lake bottoms and cedar swamps across 40-55 percent of Saginaw Valley and northern counties (Bay, Saginaw, Sanilac, Gratiot, Schoolcraft), driving muck excavation and replacement, deep pier or engineered foundations, and mound or at-grade septic designs. Water tables run shallow: median depths of 6-15 inches are common: so dewatering and seasonal timing matter year-round. Bedrock is deep in the drift except along the Niagara Escarpment in the eastern upper peninsula, where limestone lies near the surface. Frost depth reaches the deepest design values in the country's lower 48 lake region (42-48 inches), and the short construction season concentrates excavation work tightly between May and October.

Geographic Footprint:Michigan's northern lower peninsula and eastern saginaw-plain counties (Traverse City, Petoskey, Gaylord, Saginaw, Bay City plus the upper peninsula) sit on outwash sand with heavy peat and muck: clean-cutting sands, wetland-heavy landscapes, shallow water tables and a compressed building season. Septic work is mound- and site-evaluation-driven.
Geotechnical Baseline

Physical Ground Conditions & Soil Properties

Shallow Bedrock (<50 in)
12.0%of county land area

Deep soil mantle; rock refusal rare for standard basement or trench cuts.

High Shrink-Swell Clay
1.3%expansive soil

Low volumetric expansion risk in native subgrade.

Median Water Table Depth
6inches from surface

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

Hydric / Wetland Soils
40.5%hydric coverage

Indicates poor natural drainage and potential jurisdictional wetland pockets.

Steep Terrain (Slope >15%)
0.9%of terrain

Predominantly gentle to rolling slopes suitable for wheeled earthmoving.

Septic Severe Limitations
95.9%severe rate

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

Dominant Soil Textures:LoamLoamy fine sandSilty clay loam
Surface Stones / Boulders: 0.0% coverage
Compliance & Permitting

Earthwork Regulations & Permit Thresholds

Stormwater & Erosion Control
Michigan EGLE Permit-by-Rule (Mich. Admin. Code R 323.2190) tied to Part 91 Soil Erosion and Sedimentation Control permit: earth change disturbing one acre or more (or within 500 ft of a lake or stream) needs a Part 91 SESC permit from the county/municipal enforcing agency; 1 to under 5 acres gets automatic NPDES coverage, 5 acres or more also requires a Notice of Coverage via MiEnviro ($400).

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

State Threshold:1.00 Acre
Local Threshold:Follows state
Onsite Wastewater & Utilities
St. Clair County Health Department (Environmental Health)

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

Housing on Septic:35.0%
Soil Evaluation:Sanitarian site evaluation of soil drainage, permeability and seasonal high water table; soil profile method, perc use varies by county
811 One-Call Requirements
MISS DIG 811

Mandatory notice window: 72 hours prior to mechanized earthwork (excluding weekends and legal holidays).

Licensing & Clearing Permits
Weather & Ecology

Seasonal Constraints & Clearing Windows

Frozen Ground Days
60days / year

Typical days with sub-freezing soil conditions affecting digging.

Supply Chain & Hazards

Logistics, Aggregate Sources & Geohazards

Aggregate & Material Supply
Raymond Pit

Nearest active quarry: 9.5 miles haul distance.(23 active crushed stone/sand operations within 50 miles).

Flood & Hazard Overlay
FEMA 100-Yr Flood:4.5%(100% NFHL digital map coverage)
NWI Wetlands:19.8%jurisdictional coverage
Karst Terrain & Sinkhole Risk: Low

12.7% of county underlain by soluble carbonate rock formations.

HUC8 Primary Watersheds:Clinton, Birch-Willow, St. Clair, Lake St. Clair, Ausable River-Frontal Lake Huron, Lake Huron
Public conservation land: 0.6% (USGS PAD-US).

Area-specific FAQ

Do I need to call before digging in St. Clair County?

Yes. You should contact MISS DIG 811 at least 3 working days before any digging so underground lines can be marked.

How deep do footings need to be in Michigan?

In Michigan, footings typically need to extend below the frost line, which is around 48 inches here. A local contractor will confirm the code requirement for your site.

Verified local listings

Excavation contractors serving St. Clair County

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