Geotechnical Engineering
MTC's geotechnical consulting and engineering services encompass subsurface investigations, foundation design, liquefaction and compressible soil mitigation, slope stability analysis and full-service earthwork monitoring. Our in-house staff includes a Washington State licensed professional engineer, licensed engineering geologist and experienced soil technicians. The staff is supported by three soil laboratories that perform all tests in accordance with ASTM, WSDOT and ICC standards. MTC's broad experience with intermediate and deep foundation elements allows flexibility and efficiency for designing developments in unstable soils. We specialize in cement-modified soils, an economical treatment solution that can result in significant cost savings for earthwork projects with adverse subgrade conditions. Our staff has completed large geotechnical investigations and designs for sites exceeding 50 acres in size and monitoring massive, aggressive earthwork endeavors.
Intermediate and Deep Foundation Elements
- Helical and drawn-down piles
- Auger-cast piles
- Geopiers
- Stone columns
- Drilled concrete piers
- Driven piles
Retaining Wall Design and Construction Monitoring
- Allen block
- Keystone
- Ecology Block
- Rockery
- Mechanically Stabilized Earth Wall
- Hilfiker wall
Subsurface Investigation
- Groundwater characterization
- Liquefaction potential
- Settlement estimates
- Allowable Bearing Capacity
- Slope Stability
- Stripping depths
- Seismic parameters
Geohazard Assessment for Critical Areas Ordinances
- Erosion hazards
- Landslide hazards
- Alluvial fan hazards
- Mine hazards
- Volcanic/lahar hazards
- Mitigation for geohazards
- Building setback recommendations
Construction Services
- Dewatering of excavations
- In-place density and compaction testing of structural fill
- Subgrade evaluation and stabilization
- Over-excavation monitoring
- Geotextiles and geogrids
- Cement-modified soils
All MTC reports and documents can be made available online to our clients via the Digital PaperRoute (DPR). Using DPR users have the ability to track, download and sort every MTC report for a project from any web browser. Click here to find out more about this powerful project management tool that MTC offers at no extra cost.
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Rockery and retaining wall design and installation inspection
Nuclear densometer testing (in-place density and moisture) for soil and asphalt
Slope stability, critical areas and geohazard assessment
Earthwork monitoring for mechanically stabilized earth walls
Geotechnical engineering and investigation with boreholes
Monitoring for installations of Geopiers and other ground improvement methods
Load test monitoring
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