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Geotechnical Engineering

Geotechnical Engineering

Norwest’s geotechnical group offers a comprehensive range of services to meet the life cycle needs of any type of mining operation. From scoping level to active operations through to site closure, our technical staff members are well-versed in providing practical, cost-effective, and often integrated solutions to every project. We bring world-wide experience from various coal, metals, and industrial mineral operations, with a strong focus on oil sands development.

Our expertise generally covers the following main areas: slope stability, design of earth structures, mine waste management, instrumentation and monitoring programs, mine closure planning, and tailings management.

Our services include:

Geotechnical Designs:

  • Detailed designs for open-pit slopes.
  • Detailed designs for waste dumps, rock piles, and earth dam structures.
  • Slope stability assessments and evaluation of stabilization methods.
  • Life of mine designs.
  • Infrastructure offset or boundary assessments.
  • Mine waste management planning.
  • Tailings management and reclamation assessments (e.g. capping).
  • Geosynthetics designs.
  • Mine closure, progressive reclamation, and geomorphic landscape designs.

Operational Support:

  • Geotechnical support for operating mines, from short-range to long-range planning.
  • Construction material suitability studies (to optimize the use of mine waste for construction).
  • Design and completion of instrumentation and monitoring programs.
  • Design optimization based on detailed site information.

Other Areas Including:

  • Geotechnical site characterization and foundation assessments.
  • Evaluation of tailings technologies
  • Construction inspection and quality control/assurance
  • Rock slope hazard assessments
  • Evaluation of re-sloping options

Case Study

Coal Project, British Columbia

Norwest’s geotechnical group was hired to perform initial site investigations and develop permit-level geotechnical designs for a tailings dam, coarse coal reject (CCR) pile, a large rock drain, and waste rock dumps for a coal project in Northeast British Columbia. Subsequent work included additional site investigations to support a mine permit amendment based on an increased coal production schedule. Upon permit approval, Norwest was engaged to provide detailed geotechnical designs, prepare tender packages, develop Issued For Construction (IFC) drawings, and provide on-site construction management for the initial starter dyke construction.

Norwest has been actively involved with this project since its inception and has developed IFC drawings and provided construction management for the expansion of the tailings dam and CCR pile underdrain system. Norwest has been responsible as the engineer of record to perform annual dam safety and waste rock dump inspections and create annual inspection reports that are submitted to the Ministry of Energy and Mines as per regulatory requirements.

Working closely with the client to successfully meet their needs over the past 10 years has allowed Norwest to perform tailings storage option studies, develop a site wide geotechnical monitoring program, provide on-going operational support, and the execute numerous geotechnical site investigation programs.