Excavation contractor jobsite in Anoka County, MN

Photo: 123dieinafire (talk) (Public domain) via Wikimedia Commons

Anoka County, MN Contractor directory

Excavation contractors in Anoka County, MN

26 verified excavating and site work contractors serving Anoka County.

View contractors

County excavation guide

Ground conditions and project requirements in Anoka County

Use this local research to understand soil, seasonal constraints, permits, and jobsite logistics before choosing a contractor.

Skip to 26 contractors
Soil Regime ProfileEPA Ecoregion 46, 48 (Lake Agassiz Plain, Northern Glaciated Plains)

Minnesota Glacial Lake Plain & Prairie Pothole Till

Dominant Soil Order: Mollisols / Alfisols / Vertisols
Parent Material: Glacial Lake Agassiz Lacustrine Silt and Clay, Des Moines Lobe Till, and Outwash Sand over Deep Bedrock

Minnesota's western and southern counties sit on the flattest agricultural land in the country: Glacial Lake Agassiz sediments in the Red River Valley and Des Moines Lobe till across the south. The profile is clay loam and silty clay over deep drift, with the Red River Valley's famous wet clays (Fargo, Bearden series) shrinking and swelling through every season: shrink-swell runs the highest averages in the Midwest here (4 percent of land, with localized smectite clays far worse), and foundation and utility work in the Valley is designed around seasonal movement and drainage. Hydric soils occupy 38 percent of the average county, prairie potholes and the Red River floodplain make dewatering and wet-weather access standard bid items, and median water tables sit 13 inches down. Digging itself is easy; the trade is trench collapse in wet clay, frost depth at 42 inches, and mound or at-grade septic systems wherever tight clay and shallow water meet.

Geographic Footprint:Minnesota's southern and western counties (the Red River Valley from Marshall through the Twin Cities, plus the southern farm belt) share young glacial lake and till profiles: deep wet clays, the highest shrink-swell in the Midwest, pothole wetlands, and 42-inch frost. Rock is essentially absent; water and clay movement define the work.
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
0inches from surface

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

Hydric / Wetland Soils
38.3%hydric coverage

Indicates poor natural drainage and potential jurisdictional wetland pockets.

Steep Terrain (Slope >15%)
2.6%of terrain

Predominantly gentle to rolling slopes suitable for wheeled earthmoving.

Septic Severe Limitations
91.0%severe rate

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

Dominant Soil Textures:Fine sandFine sandy loamLoamy sand
Surface Stones / Boulders: 8.1% 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
Anoka County Environmental Services (SSTS Program)

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

Housing on Septic:20.0%
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
90days / year

Typical days with sub-freezing soil conditions affecting digging.

Wet Season Months
May, June, July, August

Peak precipitation window requiring sediment traps and soil aeration.

Supply Chain & Hazards

Logistics, Aggregate Sources & Geohazards

Aggregate & Material Supply
Sand & Gravel Operations

Nearest active quarry: 9.4 miles haul distance.(35 active crushed stone/sand operations within 50 miles).

Flood & Hazard Overlay
FEMA 100-Yr Flood:23.1%(100% NFHL digital map coverage)
NWI Wetlands:41.0%jurisdictional coverage
Karst Terrain & Sinkhole Risk: Low

19.6% of county underlain by soluble carbonate rock formations.

HUC8 Primary Watersheds:Twin Cities, Rum, Lower St. Croix
Public conservation land: 12.3% (USGS PAD-US).

Area-specific FAQ

Do I need to call before digging in Anoka 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 Anoka County

26 verified listings (showing first 20)

Nearby counties

Cities in this county