Sam Bibler Memorial TrailGeolocation: 48.2005, -114.3151

The Sam Bibler Memorial Trail in Kalispell, Mont., included a section of the bicycle/pedestrian path that was constructed on a relatively steep embankment, which exhibited signs of adverse slope performance prior to construction. NTL Engineering & Geoscience, A Terracon Company, performed the geotechnical investigation for the retaining feature that would allow for grade raising without negative impact to the roadway embankment. Though traditional retaining features were reviewed, the project team elected to use an innovative approach using ultra-lightweight fill (geofoam) with relatively shallow-depth sheetpile facing to raise grade and simultaneously reduce embankment weight in order to improve slope stability. This approach provided project cost savings by limiting sheetpile embedment and/or soil anchors that would have been necessary for conventional backfill materials.

Kalispell, 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…