PPL Madison DamGeolocation: 46.8797, -110.3626

NTL, A Terracon Company, provided geotechnical design and construction observation services for the rock slope stabilization at the PPL Madison Dam in southwest Montana. Rockfall had damaged the dam's left abutment, and a program of rock bolting to stabilize large gneiss blocks was undertaken in conjunction with installation of a Geobrugg rockfall system of ring nets and high-strength wire mesh to provide both construction safety and long-term protection

Southwest Montana, 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…