About

Call & Nicholas, Inc. (CNI), an internationally recognized geotechnical engineering consulting firm, has been providing a wide range of engineering services to the mining industry since 1981. Originally established in 1979 as R. D. Call, Inc. by Dr. Richard Call, the name was changed in 1981 when Mr. David E. Nicholas became a principal and partner in the firm. Today, a full staff of geotechnical engineers, engineering geologists, and technicians, with experience in both open-pit and underground mining, provides expertise in:

  • Feasibility studies
  • Open-pit slope angle recommendations
  • Underground rock mechanics and mining method selection
  • Open-pit and underground displacement monitoring
  • Cost-benefit analysis
  • Hydrogeologic evaluation and recommended dewatering plans
  • Waste dump and tailings dam stability evaluations
  • Site investigation and foundation design for waste dumps, leach pads, and water-retention dams
  • Engineering geology
  • Geotechnical instrumentation and blast vibration monitoring
  • Operations improvement and training for blasting and construction
  • Evaluation of the mechanical properties of geologic materials
  • Foundation recommendations for mine facilities

CNI provides geotechnical engineering services for domestic and international mining projects of all types and sizes. Our clients’ needs range from small projects and feasibility studies, requiring only basic technical assistance and evaluation, to full rock mechanics studies, requiring considerable field work, data collection, follow-up monitoring, and evaluation. To help our clients reduce their costs, we work closely with the on-site technical personnel on all projects, providing training and supervision as necessary. CNI is committed to providing our clients with the highest level of service and the most cost-effective solutions to each individual design problem. CNI’s outstanding reputation has been built on the expertise and integrity of our staff and their dedication to excellence.