Cornforth Consultants
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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
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George Machan

George Machan, P.E.
Registration
Civil Engineer - OR, WA, MT, WY, UT,
ID, AK, NY, AZ
​
​Geotechnical Engineer - OR

Career
1996 - present
Senior Associate Engineer
Cornforth Consultants, Portland, OR

1995 - 1996
Region 1 Planning and Development Manager
Oregon Department of Transportation (ODOT)
Portland, OR

1991 - 1995
Westside Corridor/LRT Project Manager
ODOT, Portland, OR

1984 - 1991
Geotechnical Engineering Manager
ODOT, Salem, OR

1975 - 1984
Senior Engineer
Squier Associates, Lake Oswego, OR

Education
1974/M.S. in Geotechnical Engineering 
Purdue University, West Lafayette, IN

1973 B.S.
Civil Engineering
University of Connecticut, Mansfield, CT

Honors/Societies
TRB Committees on Transportation Earthwork  & Soil and Rock Instrumentation (AFS 10 and AFS 20), Transportation Research Board

National Cooperative Highway Research Program (National Academy of Sciences)

Chair, ASCE Geotechnical Engineering Group, Portland
Senior Associate Engineer
Mr. Machan has 45 years of experience in geotechnical engineering and project development management.  Designs have included slide repairs, drainage systems, cut slopes, embankments in mountainous terrain and over compressible floodplains, retaining walls, ground anchor stabilization, foundations, light-weight fills, rock slopes and rockfall protection methods.

He also provided overall project development management for highway improvements along Sunset Highway and Highway 217 in Portland, associated with the fast-tracked Westside Light Rail project. He provided leadership in public involvement and mediation efforts to community impacts and design issues. In addition, he represented ODOT in several legal proceedings and Land Use hearings.

Several projects representative of Mr. Machan’s experience include:

  • Gas Plant Slides, Equatorial Guinea, Africa
  • Caribou Creek Section, Glenn Highway MP 100 – 109, Alaska
  • Rockfall Avalanche, Banks - Lowman Highway MP 26, Idaho
  • Emergency Road Repairs for Forest Roads (ERFO), Washington and Oregon
  • Parks Highway MP 352 Slide, Ester, Alaska
  • Richardson Highway MP 296 Anchored Retaining Walls, Richardson, Alaska
  • Sandlake Road Slide, Tillamook County, Oregon
  • Interstate 84 Rock Slide, Echo, Utah
  • Cornelius Pass Road Landslide, Multnomah County, Oregon
  • Hoover Landslide, Provo Canyon, SR-189, Utah
  • Snowbasin Access Road (UDOT), Weber County, Utah
  • Snake River Avenue Slide, Lewiston, Idaho
  • Bonners Ferry Slide, U.S. 95, Idaho
  • Siskiyou Pass Escape Ramp Wall Failure, Interstate 5, Near Ashland, Oregon
  • Hole-in-the-Wall Landslide, Highway 86, Halfway, Oregon
  • Portland Zoo Slide, Sunset Highway 26, Oregon
  • Osweg Creek Slide, Highway 26, Near Elsie, Oregon
  • Looking Glass Hill (MT 49) Slides, East Glacier, Montana
  • Cornell Road Subgrade Claim, Hillsboro, Oregon
  • Southwest 45th Avenue Embankment Failure, Portland, Oregon
  • Route 219, Scoby Hill Rd Slide, Springville, New York
  • Uplift Failure of a Buried Fuel Tank, Albany, Oregon
  • Highway U.S. 26, South of Warm Springs, Oregon
  • SR 87 Landslide near MP 224, Payton, Arizona
  • John Day River Embankment Slide, Highway 30, Near Astoria, Oregon
  • Galena Summit Slide, SH-75, Idaho
  • Crater Lake Rim Drive Stability, Crater Lake National Park, Oregon
  • Rosie's Ridge and Togwotee Pass Slides, Wyoming

Selection of technical presentations and lectures:
  • Landslide Application of the Geotechnical Observational Approach, 3rd North American Symposium on Landslides, Roanoke, Virginia
  • Complexities of Determining Properties of Diatomaceous Deposits, Transportation Research Board Annual Meeting, Washington DC
  • Geotechnical Planning for US26 Corridor (Swan Valley – Wyoming state line), Presentation to New York  DOT
  • Invited Lecturer, Observational Method Approach To Monitor Construction Of Highway Embankments On Active Landslides, Geotechnical & Structural Instrumentation, Monitoring, and Information Engineering Short Course, Golden, Colorado

​Mike Meyer - Gerry Heslin - George Machan - ​Charlie Hammond - Brent Black - Darren Beckstrand - Chris Carpenter - Ben George
​
Wade Osborne -  Tom Westover - Greg Landau - Aine Mines - Logan Allender - Andy Kost - Adam Koslofsky - Sebastian Dirringer
Rachel Hunt -Justin McCarley - Aleyna Link - Michael Bunn - Andy Vessely - Larry Pierson - John Sager
  • 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