Landslide Technology
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Iron Gate Dam Access Road Rockfall Mitigation

Hornbrook, California
Scaling and Bolting ActivitiesScaling and Bolting Activities
ate Dam is located on the Klamath River system in northern California. An approximately 2,000-foot long road provides access to a powerhouse and fish nursery at the base of the Dam.  The access road paralleled a 200-foot tall rock slope with an active history of rockfall that presented a substantial risk to the powerhouse, fisheries personnel, and visitors. 

Landslide Technology (LT) was retained by PacifiCorp to perform an evaluation and develop rockfall mitigation options.  A modified version of the Rockfall Hazard Rating System (RHRS) was used to determine which slope sections presented the highest rockfall hazard. Following the RHRS evaluation, multiple mitigation measures including extensive scaling, draped gabion mesh, shotcrete, ditch improvements, and key block rock bolting were implemented to improve site safety.

Due to the concern for worker safety, PacifiCorp chose to mitigate the entire slope rather than individual high rated sections. During construction, LT provided full time on-site QA/QC construction observation services.



Services Provided:

  • Rock Slope Investigations
  • Rock Slope Hazard Assessments
  • Hazardous Rock Stabilization
  • Rock Bolt and Draped Mesh Design
  • Technical Guidance During Construction
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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