A new open pit adjacent to the existing open pit and two significant expansions to the existing fixed infrastructure of the mine are proposed in an area which has the generally low ambient noise levels typical of unoccupied rural environments. The investigation's purpose was to estimate any potential noise impact of the proposed expansions on the existing ambient noise climate in the surrounding area. This was achieved by measuring and modeling the existing ambient noise levels around the site as well as the noise of current operations at the mine, jn order to obtain the current baseline situation. A comparison was then made with the modeled future situation, including the new SK4 open pit operations and the acid plant and ore sorter, to determine the change in noise levels and the subsequent environmental noise impact to be expected of the proposed expansion.