Cornforth Consultants
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    • Earth & Rockfill Dams
    • Reservoirs, Canals, and Levees
    • Spillway Safety Inspections
    • Landslides and Rockfall
    • Earthquake Engineering
    • Geologic Hazards
    • Geotechnical Site Characterization
    • Hydrogeology
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    • Geotechnical Instrumentation
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    • Earth and Rockfill Dams >
      • Barney Reservoir
      • Frog Lake Reservoir
      • Iron Gate Dam Raise
      • McGuire Dam Raise
      • Bonneville Cofferdam
      • Bull Run No. 2 Seismic Stability Analysis
    • Levees and Canals >
      • Libby Dike Rehab.
      • St. Johns Dike Stabilization
      • Cowlitz River Levees
      • Swift Canal Failure
    • Earthquake Engineering >
      • Barney Dam Seismic Analysis
      • Fern Hill WTP Liquefacation Study
      • Bull Run No. 2 Seismic Stability Analysis
      • Mt. Tabor Seismic Stability Analysis
      • Port Westward Power Plant Seismic Design
    • Rock Slopes and Tunnels >
      • Libby Rockfall Mitigation
      • Sandy River Pipeline Tunnels
      • Ketchikan Third Avenue Extension
      • Sain Creek Water Supply Tunnel
      • Montana Rockfall Hazard Rating System
    • Foundations >
      • Port Westward Power Plant
      • Cascade Locks Casino
      • Air National Guard Hangar
      • Biglow Canyon Windfarm
      • Oakridge Water System Improvements
    • Concrete Dams and Locks >
      • John Day Lock & Dam
      • Marmot Dam Removal
      • The Dalles Dam
      • Willamette Falls Dam
      • Bonneville Dam
    • Transportation >
      • OTIA Cracked Bridge Geotechnical Baselines
      • Newburg Dundee Bypass Design DEIS
      • I-84 Sandy River Bridge Investigation
      • Tanana River Bridge Foundation, Tok, Alaska
      • Montana RHRS Implementation
      • Ketchikan Third Avenue Extension
    • Ports and Airports >
      • Navy CVN Drydock
      • Depoe Bay Seawall Distress
      • Willamette Falls Flow Control Structure
      • Air National Guard Hangar
    • Water and Wastewater >
      • Fern Hill Water Treatment Plant
      • Tualatin Valley North Transmission Line
      • Evaluation of 28 Water Storage Facilities
      • City of Sandy Water Treatment Plant
      • Mt. Tabor Reservoir No. 5 Cap Study
      • Oakridge Water System Improvements
  • Staff
  • Resources
  • Careers
    • Geotechnical Engineer
  • Contact Us
TECHNICAL RESOURCES
Cornforth Consultants contributes to the geotechnical state of the practice through original research and complex case histories. The cornerstone of these publications has been the 2005 publication of Landslides in Practice: Investigation, Analysis, and Remedial/Preventative Measures by company founder, Derek Cornforth.
​

Select publications by our staff are offered for reference or download below:

Dams, Embankments, and Earthquake Engineering

  • Performance of Aging Post Tensioned Rock Anchors in Dams, 2009, Gerry Heslin, Donald Bruce, G. Stuart Littlejohn, and Thomas Westover
  • Marmot Dam Removal, 2008, John Sager, Mike Meyer, and Tim Keller
  • Geomembrane Liner for Spillway Approach Canal Seepage Reduction, 2001, Andy Vessely, Nestor Mirafuente, Will Shallenberger, and Kristie Hartfeil
  • An Integrated Strategy for Seepage Control from Bull Run Dam No. 2 Spillway Approach Canal, 2000, Azad Mohammadi, Andy Vessely, Dennis Kessler, Jim Doane
  • Quantifying Earthquake and Geologic Hazards for the Portland, Oregon Vulnerability Assessment, 1999, Donald Ballantyne, Charles Scawthorn, and Andy Vessely
  • An Overview of Engineering Geology Applied to Facilities in Oregon, 1998, Charlie Hammond and James Griffiths
  • Engineering Geology of the Trask River Dam Raise, 1998, Charlie Hammond and Andy Vessely
  • Seismic Design of the Barney Reservoir Dam, Oregon, 1996, Derek Cornforth, Andy Vessely, and Randall Hill
  • Liquefaction Susceptibility of Soft Alluvial Silts in the Willamette Valley, 1996, Andy Vessely, Michael Riemer and Ignacio Arango
  • Gravel Liquefaction Analysis of an Embankment Dam, 1995, Andy Vessely and Nan Deng
  • Geotechnical Earthquake Engineering and Soil Dynamics III, Volume 1, Derek Cornforth and Andy Vessely​

Landslides & Rockfall

  • Use of Inclinometers for Geotechnical Instrumentation on Transportation Projects, 2008, George Machan and Victoria Bennett
  • Seven Deadly Sins of Landslide Investigation, Analysis, and Design, 2007, Derek Cornforth
  • Landslide Stabilization Using Piles, 2007, Andy Vessely, Kenji Yamasaki, and Ralph Strom
  • Analysis and Mitigation of a Landslide in Discontinuous Permafrost, 2007, George Machan
  • Geology in Landslide Engineering, 2007, Charlie Hammond
  • Landslide Mitigation, 2006, George Machan
  • Landslides in Practice: Investigation, Analysis, and Remedial/Preventative Options in Soils, 2005, Derek Cornforth
  • Rockfall Hazard Classification and Mitigation System, 2005, Larry Pierson, Darren Beckstrand, and Brent Black
  • Landslide Mitigation in an Urban Setting: A Case History, 2004, Michael Mathioudakis and George Machan
  • ​How Much Can it Cost to Remediate a Large Landslide, 2002, Charlie Hammond, Mike Meyer, Andy Vessely, George Machan, and Brent Black
  • Rockfall Catchment Area Design Guide, 2001, Larry Pierson, C. Fred Gullixson, and Ronald Chassie
  • Engineering Geology of the Ancient Highlands Landslide, Portland, Oregon, 1998, Charlie Hammond and Andy Vessely
  • Estimating Seismic Displacements of Marginally Stable Landslides Using Newmark Approach, 1998, Andy Vessely and Derek Cornforth
  • Rockfall Hazard Rating System Participant Manual, 1993, Lawrence Pierson and Robert Van Vickle
  • Pelton Landslide - An Unusual Double Wedge Failure, 1992, Derek Cornforth and Andy Vessely
  • ​Factors of Safety During Landslide Movements, 1991, Derek Cornforth and Andy Vessely​​

Other

  • Rate of Settlement of Silt Alluvium at Trojan, 1994, Derek Cornforth
  • Home
  • Services
    • Earth & Rockfill Dams
    • Reservoirs, Canals, and Levees
    • Spillway Safety Inspections
    • Landslides and Rockfall
    • Earthquake Engineering
    • Geologic Hazards
    • Geotechnical Site Characterization
    • Hydrogeology
    • Expert Witness
    • Concrete Dams and Locks
    • Geotechnical Instrumentation
    • Deep and Shallow Foundations
    • Geotechnical Manuals
  • Industries
    • Water Resources
    • Energy
    • Natural Resources
    • Industrial
    • Transportation
    • Ports and Airports
    • Expert Witness
  • Projects
    • Earth and Rockfill Dams >
      • Barney Reservoir
      • Frog Lake Reservoir
      • Iron Gate Dam Raise
      • McGuire Dam Raise
      • Bonneville Cofferdam
      • Bull Run No. 2 Seismic Stability Analysis
    • Levees and Canals >
      • Libby Dike Rehab.
      • St. Johns Dike Stabilization
      • Cowlitz River Levees
      • Swift Canal Failure
    • Earthquake Engineering >
      • Barney Dam Seismic Analysis
      • Fern Hill WTP Liquefacation Study
      • Bull Run No. 2 Seismic Stability Analysis
      • Mt. Tabor Seismic Stability Analysis
      • Port Westward Power Plant Seismic Design
    • Rock Slopes and Tunnels >
      • Libby Rockfall Mitigation
      • Sandy River Pipeline Tunnels
      • Ketchikan Third Avenue Extension
      • Sain Creek Water Supply Tunnel
      • Montana Rockfall Hazard Rating System
    • Foundations >
      • Port Westward Power Plant
      • Cascade Locks Casino
      • Air National Guard Hangar
      • Biglow Canyon Windfarm
      • Oakridge Water System Improvements
    • Concrete Dams and Locks >
      • John Day Lock & Dam
      • Marmot Dam Removal
      • The Dalles Dam
      • Willamette Falls Dam
      • Bonneville Dam
    • Transportation >
      • OTIA Cracked Bridge Geotechnical Baselines
      • Newburg Dundee Bypass Design DEIS
      • I-84 Sandy River Bridge Investigation
      • Tanana River Bridge Foundation, Tok, Alaska
      • Montana RHRS Implementation
      • Ketchikan Third Avenue Extension
    • Ports and Airports >
      • Navy CVN Drydock
      • Depoe Bay Seawall Distress
      • Willamette Falls Flow Control Structure
      • Air National Guard Hangar
    • Water and Wastewater >
      • Fern Hill Water Treatment Plant
      • Tualatin Valley North Transmission Line
      • Evaluation of 28 Water Storage Facilities
      • City of Sandy Water Treatment Plant
      • Mt. Tabor Reservoir No. 5 Cap Study
      • Oakridge Water System Improvements
  • Staff
  • Resources
  • Careers
    • Geotechnical Engineer
  • Contact Us