Geotechnical Engineering and Construction Material Testing and Inspection

WSB has over four decades of experience providing innovative and cost-effective geotechnical engineering and construction materials testing and inspection services in the public and private sectors. Our experience includes work on roads and bridges and national retail, residential, commercial and mixed-use developments. To meet your project needs, our licensed engineers and certified technicians provide an array of field and lab services. 

WSB's Burnsville lab is an AASHTO Accredited Laboratory.

AASHTO accreditation means that WSB now performs all lab operating procedures meet specific national and international standards, providing confidence in the services and results provided.  Additionally, WSB is now eligible to complete lab testing for national, state and local entities that require the AASHTO accreditation.  

Our geotechnical engineering and construction material testing and inspection services include:

  • Subsurface explorations (drilling and sampling)
    • Penetration test borings
    • Flight auger borings
    • Rock coring 
    • Piezometer and monitoring well installation
    • Boring logs (soil classification, N-values, groundwater)
  • Laboratory testing
    • Proctors (moisture/density relationships)
    • Atterberg limits 
    • Grain size analysis (gradations and hydrometer) 
  • Geotechnical engineering report (analysis and design of foundations, earth retaining structures, ground improvements, slope stabilization, underground utilities and pavements.)
    • Soil bearing capacity 
    • Soil parameters (friction angle, cohesion/adhesion/unit weight)
    • Foundation recommendations
    • Estimated settlements
    • Building and pavement subgrade recommendations.
    • Estimated “R” value
    • Pavement design
    • Construction materials testing (laboratory and field)
  • Soil
  • Aggregate
  • Concrete
  • Grout
  • Mortar
  • Bituminous
  • Special inspections and construction observations
    • Construction techniques/materials meet project specifications
    • Documentation of quantities
    • Recording as-built Information
    • Excavation observations
    • High-tensile bolts
    • Reinforcing bars
  • Pavement management
    • Perform field distress surveys
    • Pavement coring and forensic testing
    • Repair recommendations
    • Feasibility studies
    • Performance prediction models

Public Works Campus Redevelopment  |  Mounds View, MN


Darin Hyatt, PE | Senior Geotechnical Engineer