The proposal referred to the Environmental Protection Authority is the Hidden Secret underground Mine.
Kalgoorlie Consolidated Gold Mines Pty Ltd (KCGM) proposes to mine for gold at the Hidden Secret ore body. Hidden secret is an underground ore body located east of Williamstown, 350 metres east of the Mt Charlotte underground mine. The Mt Charlotte Underground Mine is operated by KCGM and is located adjacent to the City of Kalgoorlie-Boulder, approximately 600 kilometres east of Perth.
Mining at Hidden Secret will be occurring between 215 and 440 metres below surface, with deeper operations located under some residential properties in Williamstown. The proposal is estimated to contain 665,000 tonnes of ore and is expected to increase the life of the Mt Charlotte Underground Mine by two years. The proponent will be utilising existing infrastructure from the Mt Charlotte operations for this proposal including the decline portal to haul material to the Mt Charlotte processing facilities, the mine ventilation system and existing mining equipment with the addition of a haul pak. In relation to the underground mining operations, KCGM is effectively maximising the use of its existing fleet.