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Geotechnical Engineering Services

Reno Tahoe Geo Associates, Inc. (RTGA) - provides a wide range of geotechnical engineering services including geotechnical, seismic (including liquefaction), and geologic hazard assessments, geotechnical investigations, and fault evaluation studies. Our projects have included small and large residences, low-rise and mid-rise commercial buildings, industrial buildings, airport structures, storage tanks, channels, water treatment facilities, urban utilities, pipelines, power lines, roads, parking areas, and bridges. 

We routinely provide geotechnical input for shallow foundation design, earth pressures and drainage for retaining walls, earthwork, concrete flat work and roadway sections, retaining and rockery wall construction, and sub-drainage systems. We have experience developing design solutions for less-than-optimal sites, including those with expansive soils, by utilizing drilled shafts, driven pile foundations, and ground improvement for settlement control and liquefaction mitigation. 


Additionally, we develop solutions for erosion control and temporary and permanent slope, embankment, and stream bank stability, and design retaining structures (rockery wall, segmental block, Keystone, Redi-Rock, and soil nail and shotcrete). Where appropriate, we often specialize in providing soil explorations for hard-to-access sites, including using portable methods such as shear-wave velocity surveys and dynamic cone penetrometer (DCP) soundings.

  • Geotechnical investigation for residential, commercial, and industrial buildings

  • Analysis and design for dam/levee, storage tank, channel, water treatment facility, pipeline, powerline, and bridge projects

  • Fault, seismic, and slope stability analysis

  • Foundation design recommendations and distress analysis

  • Geologic mapping and sampling

  • Percolation testing and septic system design

  • Pavement analysis, design, and management

  • Geophysical surveys and measurements

  • Expansive soil evaluation and mitigation

  • Liquefaction analysis

  • Rockery retaining wall analysis and design

  • Material borrow source evaluation

  • Settlement analyses

  • Earthwork and grading recommendations

  • Site-specific site response characterization

  • Bedrock rippability evaluations

  • Dewatering

  • Dynamic analyses for machine foundations

  • Identification of development constraints

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