Landslide Technology
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    • Logan Allender
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    • Michael Bunn
    • Andy Vessely
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Banks-Lowman Hwy Rockfall Mitigation

Banks, Idaho
Rockslide Impacting the Banks-Lowman HighwayRockslide Impacting the Banks-Lowman Highway
The Banks Lowman Highway is a National Scenic Highway through the Boise National Forest in southwestern Idaho.  During winter months, 50,000 cubic yards of rock failed onto the highway.  The rock slide was approximately 350 feet wide and extended over 300 feet above the road.  Landslide Technology was selected by the Idaho Department of Transportation to perform an emergency site reconnaissance and develop a rockfall protection strategy to reopen the highway by the time slide debris was removed.  The size of the rockfall source area and the low quality, highly altered granite bedrock made complete elimination of the rockfall potential infeasible. 

LT worked within the available construction budget to develop rockfall mitigation recommendations to protect highway users from the anticipated routine type of rockfalls at the site.  LT staff directed high scaling efforts to remove unstable blocks in the source area while the DOT’s earthwork contractor worked to remove the 50,000 cubic yards of material covering the highway.  Slope data was collected and actual rockfalls were observed during high scaling and trim blasting work.  Data and observations were used in performing rockfall computer simulations to quantify expected rockfall behavior before the scaling contractor demobilized. 
​
Mitigation included scaling unstable rock blocks, regrading portions of the slope to remove launch features, improving fallout area geometry, draping rockfall protection mesh over highly unstable portions of the source area, and installing a 184-foot-ton rockfall barrier system near the edge of the road.


Services Provided:

  • Rockfall Mitigation 
  • Rock Slope Hazard Assessment
  • Rockfall Barrier Design


  • Hazardous Rock Removal and Stabilization
  • Emergency Response and Fast-track Mitigation Design
  • Rockfall Modeling
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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