Article

This study evaluates reclamation efforts at the Kimheden copper mine in Västerbotten, Sweden, focusing on acid mine drainage (AMD) prevention. Reclamation involved backfilling open pits with waste rock and applying a dry cover starting in 1996.

Research conducted between 2009 and 2014 assessed the effectiveness of these measures on controlling copper and zinc concentrations in drainage water. Findings indicate that while there were reductions in metal concentrations, water quality remains unsatisfactory, suggesting ongoing sulphide oxidation despite the cover. Potential oxygen transport pathways were identified, and strategies for improvement are discussed.