Flint Creek LandslideGeolocation: 46.3375, -113.4648

This first phase of this project included evaluation of landsliding and rock sliding along 5 km of high-hazard rockfall zones along Montana Route 1 in Granite County, MT. Terracon personnel performed geologic, geotechnical, and photogeologic mapping of rock outcrops along the project. In the second project phase, Terracon was retained by Montana DOT to perform observations and testing of rock bolt/rock nail and debris flow structure installation. Using high-angle climbing techniques, Terracon personnel designed and implemented a testing equipment restraint system and then observed the installation and testing of rock bolts, rock nails, and other tensioned elements at elevations up to 150 feet above the adjacent highway.

Granite County, MT


Associated Office

Great FallsGeolocation: 47.4908, -111.3376
The Great Falls office was formed in 1991 as NTL Engineering & Geoscience, Inc., an employee-owned Montana corporation practicing in the geotechnical, construction materials, and environmental engineering and testing fields. NTL joined Terracon in 2008 and officially changed its name to Terracon in 2013. The Great Falls engineering staff have a wide range of geotechnical experience on projects ranging from large industrial facilities to dams, bridges, highways, landslides, rockfalls, retaining structures, defense facilities, and seismic-related studies with geographic project involvement…