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    • Transportation >
      • I-15 (D3) Rock Slope Mitigation
      • Ketchikan Third Avenue
      • US Hwy 2 Libby Rockfall
      • Banks - Lowman Hwy
      • SR 191 Rock Cut Design
      • Going-to-the-Sun Road
      • SR 12 Rockfall Mitigation
      • Lakeside Rockfall
      • US 2 Badrock Canyon
      • South Tongass Highway
      • Weeksville Rock Bolting
      • US 26 Cove Palisades
  • Key Staff
    • Mike Meyer
    • Gerry Heslin
    • George Machan
    • Charlie Hammond
    • Brent Black
    • Darren Beckstrand
    • Chris Carpenter
    • Ben George
    • Wade Osborne
    • Tom Westover
    • Aine Mines
    • Adam Koslofsky
    • Logan Allender
    • Andy Kost
    • Collin McCormick
    • Anna Casady
    • Noah Kimmes
    • David LaPorte
    • Justin McCarley
    • Aleyna Donaldson
    • Michael Bunn
    • Andy Vessely
    • Larry Pierson
    • Derek Cornforth (Founder)
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Lawrence A. Pierson

Registration
 Engineering Geologist - OR, WA

​Geologist - OR, WA

Career
2000 - present
Staff Consultant
Landslide Technology, Portland, OR

1978 - 2000
Chief Engineering Geologist
Oregon Department of Transportation
(ODOT), Salem, OR

Education
1975/B.S. in Geology
University of California, Los Angeles, CA

Honors/Societies
National Academy of Science, Transportation Research Board, Committee on Engineering Geology (Chairman)

National Academy of Science, Transportation Research Board
Subcommittee on Rockfall Management

Member-author TRB Task Force AFP 15T publication on Rockfall Evaluation and Control

Member, Association of Engineering Geologists

Member, American Rock Mechanics Association

Member, International Society of
​Rock Mechanics

U.S. Representative (Debate Panel) to 11th International Congress of the International Society of Rock Mechanics; Lisbon, Portugal
Staff Consultant
Mr. Pierson has over 40 years of experience in engineering geology, and is a nationally recognized expert in the field of rock mechanics with a specialty in transportation projects. Twenty-two years of his experience were with the Oregon Department of Transportation where he served as a Geotechnical Manager and Chief Engineering Geologist. He was responsible for rock slope and rockfall mitigation designs, foundation evaluations for structures, and managing quarry operations and transportation research projects. As part of national pooled-fund research projects, he has developed management and design systems including the Rockfall Hazard Rating System (RHRS) used by U.S. and Canadian transportation agencies as a rock slope management tool, and a national transportation guideline for design of rockfall catchment areas (RCAD).

With Landslide Technology Mr. Pierson has managed major geotechnical projects for the Federal Highway Administration, State DOTs and regional utility companies. He has managed the development of geotechnical procedure manuals and has provided expert witness services on several rockfall litigations and construction claims for transportation agencies.

Several projects representative of Mr. Pierson’s experience include:
​
  • Comprehensive RHRS Implementation, Montana Department of Transportation, Montana
  • Rockfall Litigation, Washington Department of Attorney General, Washington
  • Diablo Dam Rockfall Mitigation, Seattle City Light, Washington
  • Highway 101 Neahkahnie Bridges and Viaducts Rockfall Mitigation, Manzanita, Oregon
  • Cougar Dam Intake Tower Modifications, McKenzie River, Oregon
  • Rockfall Litigation, Ministry of Attorney General, British Columbia, Canada
  • Going-to-the-Sun Road Transportation Corridor Improvements, Glacier National Park, Montana
  • Lemolo Canal No. 2 Rockfall, Tokatee Falls, Oregon
  • ODOT's Kruger Rock Stability Research Facility, Portland, Oregon
  • Prospect Penstock Rockfall, PacifiCorp, Oregon
  • RHRS Implementation, Virginia and Utah Departments of Transportation
  • Al Baha Descent Highway, Ministry of Communications, Al Baha, Kingdom of Saudi Arabia
  • Third Avenue Extension, Alaska Department of Transportation and Public Facilities, Ketchikan, Alaska

Mike Meyer - Gerry Heslin - George Machan - ​Charlie Hammond - Brent Black - Darren Beckstrand - Chris Carpenter
Ben George - Wade Osborne -  Tom Westover - Aine Mines - Logan Allender - Andy Kost - Adam Koslofsky
Collin McCormick - Anna Casady - Noah Kimmes - David LaPorte - Justin McCarley - Aleyna Donaldson
Michael Bunn - Andy Vessely - Larry Pierson - Derek Cornforth
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  • Home
  • Specialty Services
    • Geotech. Asset Mgmt. >
      • Montana Rock Slope Asset Mgmt. Program (RAMP)
      • Alaska Geotech Asset Mgmt
      • Ohio Landslide Inventory
    • Rope Access
    • 3D Modeling
    • Dam Safety & Slope Stability
    • Const. Sequence Modeling
    • Geotechnical Instrumentation
    • Construction Engineering
    • Expert Witness
  • Landslides
    • Hydropower >
      • Bull Run Flume
      • Swift Powerhouse
      • Frog Lake Dam Slide
    • Transportation >
      • Hwy 101 Johnson Creek
      • Looking Glass Hill Slides
      • SR 87 Arizona Slide
      • Togwotee Pass Road
      • Scoby Hill Landslide
      • Wrangell Airport
      • Snowbasin Access Road
      • Beartooth Debris Flows
      • Three Capes Scenic Loop Landslide
      • Richardson Hwy Slide
      • Bonners Ferry Landslide
      • Light Rail Station
      • Skagway Submarine Slide
    • Natural Resources >
      • West Africa Gas Pipeline
      • Greens Creek Mine Road
    • Private Clients >
      • Wasco County Landfill Landslide
  • Rock Slopes
    • Hydropower >
      • Biscuit Rock Rockslide
      • Skagit River Rockfall
      • JC Boyle Canal Rockfall
      • Prospect Dam Rockfall
      • Iron Gate Dam Rockfall
      • Cougar Dam Rockfall
    • Transportation >
      • I-15 (D3) Rock Slope Mitigation
      • Ketchikan Third Avenue
      • US Hwy 2 Libby Rockfall
      • Banks - Lowman Hwy
      • SR 191 Rock Cut Design
      • Going-to-the-Sun Road
      • SR 12 Rockfall Mitigation
      • Lakeside Rockfall
      • US 2 Badrock Canyon
      • South Tongass Highway
      • Weeksville Rock Bolting
      • US 26 Cove Palisades
  • Key Staff
    • Mike Meyer
    • Gerry Heslin
    • George Machan
    • Charlie Hammond
    • Brent Black
    • Darren Beckstrand
    • Chris Carpenter
    • Ben George
    • Wade Osborne
    • Tom Westover
    • Aine Mines
    • Adam Koslofsky
    • Logan Allender
    • Andy Kost
    • Collin McCormick
    • Anna Casady
    • Noah Kimmes
    • David LaPorte
    • Justin McCarley
    • Aleyna Donaldson
    • Michael Bunn
    • Andy Vessely
    • Larry Pierson
    • Derek Cornforth (Founder)
  • Resources
  • Contact Us