These proceedings present state-of-the-art papers on mine and mill tailings and mine waste as well as current and future issues facing the mining and environmental communities. This includes matters dealing with technical capabilities and developments, regulations, and environmental concerns. Papers include topics related to site characterization and monitoring, reclamation and remediation, protective liners, covers, and barriers, design, operation and disposal, groundwater and surface water quality and modeling, geotechnical and geochemical aspects, reprocessing, utilization and treatment, radioactivity and risk, new technologies and paste technology, and case histories.