NTL Engineering & Geoscience, Inc., was formed in 1991 as an employee-owned, Montana corporation practicing in the geotechnical, construction materials, and environmental engineering and testing fields. In 2008, NTL was acquired by Terracon and now operates as a division of the company. The NTL engineering staff have a wide range of geotechnical experience on projects ranging from large industrial facilities to dams, bridges, highways, landslides, retaining structures, defense facilities, and seismic-related studies with geographic project involvement ranging from Wyoming to Alaska. NTL provides construction materials engineering/testing and QA/QC services for projects ranging from buildings and pavements to earth structures. In-house testing services include determination of soil/aggregate index and engineering properties, Portland and asphaltic cement concrete mix designs and related testing, along with field quality control services during construction. NTL also provides environmental assessment and remediation services that are primarily focused on petroleum hydrocarbon contamination.
1392 13th Avenue SW
Great Falls, MT 59404
Phone: (406) 453 5400
Fax: (406) 761 6655
Geotechnical
Environmental
Construction Materials
Facilities

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…

After providing geotechnical engineering support for design of the projects, NTL, A Terracon Company, provided both Quality Assurance (QA) and Quality Control (QC) materials engineering and testing for reconstruction of Runway 3/21 and Taxiway A at the Great Falls International Airport. The project included evaluation of soils/bedrock used as subgrade and substantial grade raising. Construction control and assurance included earthwork compaction, along with new Portland cement concrete and asphalt paving materials testing on the main runway and connecting taxiways. Due to the compressed…

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