Tailings impoundments considerations

When containment ponds are required for drilling fluids or cuttings, consideration should be given to the future use of those ponds for tailings impoundment, stormwater catchment, or settling ponds. 

Once the discharge of tailings ceases, the surface of the impoundment is allowed to dry. Drying of the decant pond may take place by evaporation and/or by drainage to an effluent plant. Desiccation and consolidation of the slimes may take considerable time. Stabilization can begin once the surface is firm enough to support equipment and normally involves the establishment of a vegetative cover. 

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