Landslide Technology
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Lakeside Rockfall Mitigation QA/QC

Kalispell, Montana
LT Personnel Observing Rock Bolt InstallationLT Personnel Observing Rock Bolt Installation
The Montana Department of Transportation (MDT) had experienced several rockfall events at a site along NH-5 (US 93) located 5 miles south of Lakeside, Montana.  Following one of these events in which an approximate 15-foot diameter rock reached the southbound fogline, MDT performed a site investigation and developed rockfall mitigation designs for a 250-foot section of US 93.

Landslide Technology (LT) was retained to provide full-time construction technical services for the rockfall mitigation elements including rock scaling and trim blasting; guiding and documenting rock bolt installation and acceptance testing; determining additional rock bolt and rock dowel locations, bar lengths and orientations; and assisting with the installation of instrumentation monitoring points.

Forty-one tensioned rock bolts with a total length of 995 feet and ten untensioned rock dowels representing a total length of 95 feet, were installed using a crane-mounted drill and rope work techniques. The general layout of the rock bolts and dowels coincided with the layout outlined by the MDT design, but final field adjustments were made by LT.  Nine bolts were painted with orange reflective paint provided by MDT for purposes of survey monitoring.  The instrumentation consisted of installing eight anchor points for monitoring with a tape extensometer and seven tiltmeter bases.



Services Provided:

  • Hazardous Rock Removal and Stabilization
  • Rockfall Mitigation Design Guidance


  • Rock Bolt Design
  • Construction Technical Services
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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