Subsidence Monitoring and Management Plan - June

Subsidence at the Resolution Copper (RC) project is predicted to occur in a typical slow and gradual process from approximately year 6 when the cave from the underground mining is expected to reach surface. This gradual subsiding of the surface and growth of the subsidence bowl will then occur as mining continues through its estimated 40-year life of the project and in a much smaller and slower capacity for a number of years after mining has ceased.