Every structure ultimately rests upon the earth.  The natural complexities of geology can have serious impacts on the cost, usability, and safety of structures.  Geotechnical Engineering is the branch of civil engineering which focuses on the engineering behavior of earthen materials and the impact that the subsurface conditions will have on the proposed project.  TD&H Engineering tailors the scope of the investigation to your project needs.  The number and type of borings or excavations and analysis methods provide a balance between the amount of geologic information obtained and the project budget and schedule constraints.  Geotechnical investigations obtain subsurface soil data and samples required for laboratory testing.

Our engineers are experienced with the use of advanced investigation methods, monitoring equipment, and analysis software available within the field including:

  • Cone Penetration Testing (CPT)
  • Monitoring Well Installation and Testing
  • Slope Inclinometer Installation and Monitoring
  • Geophysical Investigation Methods
  • Field Resistivity Testing
  • Variety of Software Packages
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Services Include:

  • Braced Excavation Analysis and Design
  • Classical and Theoretical Soil Mechanics
  • Cone Penetration Testing (CPT)
  • Construction/Earthwork Problem Solving
  • Conventional Shallow Spread Foundation Designs
  • Dam Safety, Stability, and Construction
  • Deep Foundation Analysis and Design
  • Design and Evaluation of Pavements for Airports, Roadways, and Parking Lots
  • Design and Evaluation of Railroad Systems
  • Excavation and Site Dewatering
  • Earthen Dams and Dikes
  • Embankment Stabilization
  • Expansive Soil Mitigation
  • Field Resistivity Studies
  • Geosynthetic Applications
  • Geotechnical Site Investigations
  • Ground Water Studies
  • Horizontal Drains
  • Interceptor and Toe Drains
  • Laboratory Soil Testing
  • Micro-piles, Resistance, and Helical Piers
  • Pavement Designs
  • Relief Wells
  • Retaining Wall Designs
  • Rock Slope Characterization
  • Rockfall Analysis and Mitigation
  • Seepage and Infiltration Studies Impoundments and Lagoons
  • Slope Inclinometers and Piezometers
  • Slope Stability Monitoring and Analysis
  • Soil Improvement Methods
  • Subgrade Soil Stabilization
  • Underpinning and Structure Releveling

Recent Geotechnical Projects

  • Montana State University Yellowstone Hall

  • Big Sky Town Center Residential & Commercial Complex

  • City of Belgrade Engineering Services

  • Skye Park Pedestrian Bridge & Path

  • Emerald Ridge Site Development

  • Wolf Run Village & Wolf Pup Daycare

  • Davenport Water Park

  • Student Recreation Center, Eastern Washington University

  • St. Joseph Regional Medical Center- Central Energy Plant

  • Proposed Bozeman Sports Complex

  • Yellowstone National Park Dormitories

  • MSU- South Fieldhouse Parking Lot Improvements

  • MSU- Residence Halls

  • Birch Point & City Beach Sewer Lift Stations

  • Spill Channel Re-Design