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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    • Geotechnical Manuals
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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
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    • Geotechnical Engineer
  • Contact Us

John W. Sager

Andy Vessely, P.E., P.G., C.E.G.
Registration
Engineering Geologist
Oregon, Washington

Geologist
Oregon, Washington
Career
1998 - present
Staff Consultant
Cornforth Consultants

1976 - 1998
Geotechnical Engineering
Branch Chief (1989-1998)
Corps of Engineers, Portland District, Oregon

1964 - 1976
Geologist
Corps of Engineers Mediterranean Division, Omaha District, Nebraska
Education
1973 M.S.
Engineering Science
University of California, Berkeley

1964 B.S.
Geology
Oklahoma State University, Stillwater, Oklahoma
Honors/Societies
Oregon Section Past Chair, Association of Engineering and Environmental Geologists

Member, U.S. Society on Dams
Past President and Fellow, Portland Post of the Society of American Military Engineers (SAME)

Distinguished Civilian Employee, Corps of Engineers, Portland District
Staff Consultant
Mr. Sager has worked with Cornforth Consultants as a designer, reviewer and supervisor for the design, construction and maintenance/repair of numerous major dam and water supply projects. While at the Portland District of the Corps of Engineers, he was manager for the District's Dam Safety Program that includes 22 high hazard dams. Mr. Sager has over 50 years of experience as an Engineering Geologist, including 32 years of practice in the Pacific Northwest.

Representative projects include the following:  
  • Bonneville Dam Second Navigation Lock, Cascade Locks, Oregon
  • Seismic Re-evaluation for Corps of Engineers Dams in the Portland District, Oregon and Southwest Washington
  • Marmot and Little Sandy River Dams Removal, Sandy, Oregon
  • Mount Saint Helens Sediment Retention Structure, Toutle River, Washington
  • Fern Ridge Dam Dewatering, Eugene, Oregon
  • Sain Creek Water Supply Tunnel Feasibility Study, Hillsboro, Oregon
  • John Day Dam Navigation Lock Test Anchors, Rufus, Oregon
  • Corps of Engineers Tunnels and Shafts Manual Reviews, Washington D.C.
  • Soda Springs Dam Fish Passage Structure, Toketee Falls, Oregon
  • Round Butte Dam Intake Tower, Madras, Oregon
  • The Dalles Dam Spillway Training Wall, The Dalles, Oregon
  • Spirit Lake Tunnel, Mount Saint Helens, Washington
  • Elk Creek Dam Litigation, Medford, Oregon
  • Mt. Pinatubo Recovery Plan, Central Luzon, Philippines
  • River Mill Dam Fish Ladder and Spillway Modification, Value Engineering, Estacada, Oregon
  • Applegate Dam Seismic Evaluation, Applegate, Oregon
  • Cougar Dam Intake Tower Modifications, McKenzie River, Oregon
  • Bonneville Dam Slurry Cutoff Wall, Cascade Locks, Oregon
  • Seven Oaks Dam Outlet Works and Gate Control Structure, San Bernardino, California 

​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