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Ann Arbor, Michigan
Geotechnical Engineering in Ann Arbor, MI
Subsurface investigations, laboratory soils testing, and geotechnical reporting to characterize site conditions before design and verify them during construction. Ann Arbor and the surrounding MI area is covered on a project basis through our Detroit, MI regional hub.
- Dispatched from
- Detroit, MI regional hub (36 mi) · project-based staffing
- Lead time
- Scheduled by phone or proposal; lead time confirmed when the scope is set
- Laboratory
- Sugar Land, TX laboratory under chain of custody, or a mobile laboratory for large projects
- Reporting
- Reviewed and issued under a documented quality system; formatted for owner, engineer, and building-official review
- Serving
- Ann Arbor and the surrounding MI area — Detroit, Grand Rapids, Warren
- Coverage
- Michigan statewide · 27 regional hubs
- Technicians
- ACI- and NICET-certified field staff; licensed professionals in Michigan
- Call us
- (346) 420-5425
Scope
Geotechnical services in Ann Arbor
- Soil borings and sampling programs sized to the structure and site
- Laboratory index testing: Atterberg limits (ASTM D4318), moisture content (ASTM D2216)
- Moisture-density relationships and bearing evaluation for foundations and pavements
- Expansive-soil characterization for slab and pavement design
- Construction-phase verification: proof rolls, subgrade acceptance, fill placement observation
ASTM D4318ASTM D2216ASTM D698ASTM D1557
Full scope, standards list, and pricing basis: Geotechnical Engineering.
Local conditions
Geotechnical conditions in Ann Arbor
Building in Ann Arbor means working with Michigan's glacially deposited soils — a variable mix of clays, silts, sands, and gravels left behind by Pleistocene-era ice sheets. That variability rarely shows itself on the surface. Saturated clay layers, perched groundwater, and abrupt changes in bearing capacity can sit within the same project footprint, creating real risk for foundations, retaining structures, and pavements if subsurface conditions aren't characterized before design. Our geotechnical engineering services address that risk directly: subsurface investigations with soil borings and in-situ testing, laboratory classification and index testing, and engineering reports that give designers and contractors the soil parameters they need to make informed decisions. Coverage for Ann Arbor is dispatched through our Detroit regional hub and scheduled in coordination with your project timeline. The laboratory processing your samples operates under a documented quality system, and field technicians hold applicable ACI and NICET certifications.
Glacial lake deposits and outwash plains common to southeast Michigan can produce frost-susceptible fine-grained soils that behave differently between wet spring conditions and summer dry periods — a factor worth addressing explicitly in foundation and pavement design. Ann Arbor's mix of institutional, multi-family residential, and commercial development often involves grading and below-grade construction where groundwater depth and soil consolidation potential carry direct schedule and cost implications.
FAQ · Ann Arbor
What soil conditions should I expect on a typical Ann Arbor site, and how do they affect my foundation design?
Southeast Michigan's glacial geology commonly produces layered profiles of sandy loam, silty clay, and outwash gravel with no consistent pattern from lot to lot. Clay layers with moderate to high plasticity can have lower bearing capacity and exhibit consolidation settlement under sustained load. ASTM D1586 Standard Penetration Tests and ASTM D2166 unconfined compression testing on recovered samples give the measured parameters your structural engineer needs to size foundations reliably.
When is frost depth a geotechnical concern for my Ann Arbor project, and how is it addressed in the report?
Michigan's design frost depth for the Ann Arbor area is generally referenced at 42 inches per the Michigan Residential Code and IBC Table 1809.5. Fine-grained, moisture-retentive soils are frost-susceptible and can heave seasonally. A geotechnical report will identify frost-susceptible soil classifications per ASTM D2487, note groundwater proximity, and provide footing depth recommendations that account for local frost penetration.
My project involves a detention basin or infiltration system — what geotechnical testing supports that design?
Stormwater infiltration design requires measured infiltration rates and seasonal high groundwater data. We perform in-situ permeability testing and log groundwater observations during boring activities. Laboratory gradation testing per ASTM D6913 and hydrometer analysis per ASTM D7928 characterize fines content, which directly affects whether native soils can support an infiltration-based system or whether an alternative approach is warranted.
Which office covers geotechnical in Ann Arbor, MI?
Field work in Ann Arbor is dispatched through the Detroit, MI regional hub, about 36 miles away. Laboratory testing is performed in Sugar Land, TX under chain of custody, or in a mobile laboratory mobilized to large Ann Arbor projects.
Are the technicians you send to Ann Arbor certified?
Field sampling and testing in Ann Arbor are performed by our ACI- and NICET-certified technicians. Geotechnical engineering and professional services are delivered with professionals licensed in Michigan, coordinated under one proposal.
Hiring: we staff this work locally. Field technician openings in Ann Arbor · all positions.
Scheduling & proposals
Need geotechnical engineering in Ann Arbor?
Call to schedule a technician, or send project documents for a written proposal.