Asia: Sepon closure planning

SRK assisted with the development of pre-feasibility level closure plans for Sepon, a large open-pit copper mine in central southern Laos. The mine site included more than 40 pits, some backfilled, and 13 waste rock dumps. SRK reviewed the main risks, evaluated closure options and developed recommendations for each area. Conceptual closure designs for waste rock dumps and pits were developed incorporating both passive and active water management infrastructure. The required closure works were described for each mine area, on a catchment by catchment basis.