Aktogay Tailings Storage Facility

Since commissioning of the TSF in 2017, ATC Williams has provided technical support during Operation and Construction, including:

• Water Balance model and updates
• Operation Manual and updates
• Monthly Tailings Deposition updates
• Supplementary geotechnical investigation
• Detailed Design of Stage 2 and Phases 1-1, 1-2, 2-1 and 2-2 of Stage 3
• QA/QC Site Supervision during construction
• Annual Surveillance Audits

In addition, Mechanical Design works were undertaken on different tasks, as below:

• Tailings delivery pipelines
• Tailings pump station design and upgrade
• Tailings distribution system
• Decant return water system (pumps and pipelines).

Operation procedures for the management of tailings and return water systems are continuously being modified considering the actual performance of the tailings deposition.

Life of Mine studies of the TSF were recently updated following the expansion and increase in tailings throughput of the TSF. ATC Williams is preparing a new annual construction plan for the purpose of long-term planning.