Correnso Underground Mine
The Correnso Underground Mine is situated between 150 and 300 metres below residential properties in Waihi's east end. Access to Correnso is via the existing Favona portal. The project began in November 2013, with all stopes and drives backfilled.
Modern mechanised mining operates from the bottom up. Mined-out areas (stopes) are backfilled so that we can access upwards the next level of the ore. Filling provides lasting stability and no large voids are left behind – as was common in the historic Martha underground mine.