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Pennington County, MN Contractor directory
Excavation contractors in Pennington County, MN
4 verified excavating and site work contractors serving Pennington County.
County excavation guide
Ground conditions and project requirements in Pennington County
Use this local research to understand soil, seasonal constraints, permits, and jobsite logistics before choosing a contractor.
Skip to 4 contractorsSoil Regime ProfileEPA Ecoregion 50, 49, 46 (Northern Lakes and Forests, Northern Minnesota Wetlands, Northern Glaciated Plains)
Minnesota Northwoods Sand Plains, Bogs & Canadian Shield Margin
Dominant Soil Order: Spodosols / Entisols / Histosols / Inceptisols
Parent Material: Glacial Outwash Sand, Lacustrine Silt, Peat and Muck over Glacial Drift and Precambrian Bedrock
Northern Minnesota is the wet end of the state: outwash sand plains, extensive peat bogs, and the granite-greenstone Canadian Shield bedrock of the Arrowhead. Ground conditions split three ways. Sand-plain counties cut fast in loamy sand but stand poorly, so trench boxes are standard. Bog and wetland counties (Clearwater, Beltrami, Lake of the Woods, Koochiching) carry hydric soils on 40-70 percent of land, muck excavation and peat removal are ordinary site work, and water tables run within inches of grade. The Arrowhead counties (St. Louis, Lake, Cook) add the state's only shallow bedrock: Precambrian greenstone, basalt and the Duluth Complex lie within 50 inches on 20-60 percent of land, so rock excavation and blasting appear in most utility bids, with frost reaching the deepest design values in the contiguous states. Shrink-swell is negligible everywhere. The compressed building season concentrates excavation between May and October.
Geographic Footprint:Minnesota's northern tier (the Arrowhead, the sand plains north of Brainerd, and the Red Lake bog country) is sand, peat and Precambrian rock: fast-cutting sands, heavy muck work, and the state's only blasting. The season runs May through October.
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
4.2%expansive soil
Low volumetric expansion risk in native subgrade.
Median Water Table Depth
9inches from surface
Shallow water table; active dewatering or sumps needed for deep trenching.
Hydric / Wetland Soils
71.6%hydric coverage
Indicates poor natural drainage and potential jurisdictional wetland pockets.
Steep Terrain (Slope >15%)
0.3%of terrain
Predominantly gentle to rolling slopes suitable for wheeled earthmoving.
Septic Severe Limitations
99.3%severe rate
High rate of conventional drainfield limitations; engineered or drip systems often required.
Dominant Soil Textures:Fine sandy loamLoamLoamy fine sand
Surface Stones / Boulders: 43.1% coverage
Compliance & Permitting
Earthwork Regulations & Permit Thresholds
Stormwater & Erosion Control
MPCA NPDES/SDS Construction Stormwater General Permit MNR100001, effective Aug 1 2023 to Jul 31 2028; construction disturbing one acre or more, or less than one acre if part of a larger common plan of development or sale of one acre or more. Online application, coverage begins one business day after complete application.
Administers NPDES stormwater discharge coverage for land-disturbing construction activities.
State Threshold:1.00 Acre
Local Threshold:Follows state
Onsite Wastewater & Utilities
Pennington County Environmental Services (SSTS Program)
Jurisdiction over septic tank permits, soil evaluation perk tests, and drainfield sizing.
Housing on Septic:55.0%
Soil Evaluation:Site evaluation report per Minn. R. 7080.1730; soil observations in exposed pit, hand auger or probe; licensed SSTS designer or soil evaluator
811 One-Call Requirements
Gopher State One Call (Minnesota 811)
Mandatory notice window: 48 hours prior to mechanized earthwork (excluding weekends and legal holidays).
Licensing & Clearing Permits
Weather & Ecology
Seasonal Constraints & Clearing Windows
Frozen Ground Days
150days / year
Typical days with sub-freezing soil conditions affecting digging.
Wet Season Months
May, June, July, August, September
Peak precipitation window requiring sediment traps and soil aeration.
Supply Chain & Hazards
Logistics, Aggregate Sources & Geohazards
Aggregate & Material Supply
Sand & Gravel Operation
Nearest active quarry: 23.9 miles haul distance.(5 active crushed stone/sand operations within 50 miles).
Flood & Hazard Overlay
FEMA 100-Yr Flood:5.5%(100% NFHL digital map coverage)
NWI Wetlands:26.3%jurisdictional coverage
Karst Terrain & Sinkhole Risk: Low
0.0% of county underlain by soluble carbonate rock formations.
HUC8 Primary Watersheds:Thief, Red Lake, Clearwater, Snake, Grand Marais-Red
Public conservation land: 13.6% (USGS PAD-US).
Area-specific FAQ
Do I need to call before digging in Pennington County?
Yes. You should contact Gopher State One Call at least 2 working days before any digging so underground lines can be marked.
How deep do footings need to be in Minnesota?
In Minnesota, footings typically need to extend below the frost line, which is around 100 inches here. A local contractor will confirm the code requirement for your site.
Verified local listings
Excavation contractors serving Pennington County
4 verified listings
Biermans Excavating and Clearing LLC
Thief River Falls, MNPennington County
demolition, driveways, excavation, foundations, grading, land clearing