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Service Area

Geotechnical Engineering

Comprehensive Geotechnical Expertise To Mitigate Risk

Providing Innovative Geotechnical Solutions for Challenging Sites

Geotechnical sampling with drill rig near slope along riverbank.

Terraphase delivers cost-effective, practical geotechnical solutions for residential, commercial, utility, and industrial projects. We have extensive experience working with municipalities, school districts, developers, and other private clients to support projects from feasibility through construction.

Our geotechnical services include:

  • Geotechnical feasibility studies
  • Geologically hazardous area evaluations
  • Slope stability analysis
  • Seismic hazards evaluation
  • Liquefaction analysis and settlement mitigation
  • Shallow and deep foundation design
  • Ground improvement solutions
  • Retaining wall and reinforced slope design
  • Pavement design
  • Infiltration feasibility and field confirmation testing
  • Peer review and litigation support
  • Construction monitoring and density testing
  • Geotechnical laboratory testing
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Representative Projects

See How We’ve Made A Difference Across Diverse Industries

Hillslide after after geotechnical repair

Skagit County Road Repair

Following a major landslide triggered by heavy rainfall, Skagit County closed a section of Prevedal Road and established a temporary

Modern 7-story multi-family residential building in urban setting.

Bryant Manor Residential Development Geotechnical Support

First AME Housing Corporation is redeveloping a site located in central Seattle, Washington. The project involves the demolition of the

Soil mixing rig performing cement stabilization for ground improvement.

City of San Leandro Ground Stabilization Design

Terraphase led the planning, design, and field implementation of a pilot-scale sludge-soil-cement stabilization project at the City of San Leandro,

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Meet Our

Geotechnical Engineering Senior Practitioners

Jeff Raines, PE, GE

Jeff Raines, PE, GE

Vice President, Senior Principal Engineer
Rick B. Powell, PE

Rick B. Powell, PE

Principal Engineer
Joseph Schmidt, PE

Joseph Schmidt, PE

Site Engineering Service Area Lead, Associate Geotechnical Engineer
Meet Our Team

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© TERRAPHASE ALL RIGHT RESERVED.

Christopher Alger, PG, CHG, CEG

Senior Principal Engineering Geologist

Christopher’s Profile

Christopher Alger, PG CHG, CEG, is a Principal Engineering Geologist at Terraphase and brings over 35 years of scientific investigation, design and consulting experience in a multidisciplinary problem-solving practice that spans contaminant hydrogeology and site remediation to geotechnical engineering for landslide and slope failure studies.

In his subsurface site characterization and remediation practice, Chris has developed creative solutions to accelerate remediation, regulatory closure, and redevelopment of impaired properties in California and throughout the United States.

Chris has designed and implemented a wide range of remediation technologies, including soil vapor extraction systems for volatile chemicals, in situ fixation injection for hexavalent chromium, in situ and ex situ bioremediation, air sparging, ozone injection, groundwater extraction and treatment, dewatering systems, and excavation programs.

Chris is routinely engaged to provide expert review and opinions in peer review and litigation projects for insurance and attorney clients involved with multi-party disputes nationwide. Chris continues to provide expert services for dry cleaner litigation and resolution, superfund defense, RCRA facility operations and closure, cost recovery, and CERCLA claims. His work in this capacity has included preparing declarations, expert reports, remedial cost estimates, depositions, and other expert witness services. Chris’s geotechnical engineering work has involved mapping of Landslides and rockfalls in the San Francisco Bay Area, Yosemite National Park, and Utah’s Wasatch Range. He has served as the engineering geologist responsible for pre-construction geotechnical investigations, oversight of client and third-party residential and commercial grading projects, and geologic hazard investigations.

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