A Canadian mining operation has produced potash and generated fine and coarse tailings since the 1970s, so when its fine tailings cells were reaching capacity, Barr was called upon to analyze potential options.
Following an alternatives assessment, Barr identified and designed upstream embankment construction and monitoring methods to extend tailings cell life and manage brine, and we developed a plan to resolve issues with both coarse-tailings operations and brine turbidity. Barr designed a 270-hectare expansion of the brine pond to meet future operating and disposal requirements.
Barr investigated soil conditions, performed geotechnical evaluations, and designed an upstream dike raise that includes a center decant structure to manage brine and enhance the stability of future dike raises. In addition, we oversaw project construction and designed another upstream dike raise on the second fine-tailings cell. The client requested assistance with creating a tailings management and expansion plan to provide a long-term vision for the life of the facility.
With our assistance, the facility successfully operates its fine-tailings cells, meeting brine-management-turbidity goals and operating its coarse-tailings pile more effectively. The client has a detailed plan for engineering and operations staff to follow that provides monitoring requirements, responsibilities, action levels, and contingency activities in accordance with Canadian Dam Safety (CDA) guidelines for dam safety.