HIGH ALTITUDE PASSIVE WATER TREATMENT SYSTEM DESIGN AND CONSTRUCTION FOR LEACH PAD EFFLUENT

摘要

Long-term closure alternative selection for heap leach pad effluent is a daunting task. Passive water treatment, if designed with enough long-term capacity, can minimize long term O&M while meeting water quality objectives.Leach pad effluent from a 30-acre leach pad at Basin Creek Mine, Basin, Montana was targeted for long-term water treatment using a passive water treatment system. The objectives and results of design and construction are:1. Design a long-term passive system utilizing existing infrastructure.2. Construct a field scale pilot test at the mine site.