Barrett, S, Beale, G & Reidel, J 2006, 'Mine Closure and Reclamation ⎯ Some Practical Examples in Different Climatic Settings', in AB Fourie & M Tibbett (eds), Proceedings of the First International Seminar on Mine Closure
, Australian Centre for Geomechanics, Perth, pp. 453-462, https://doi.org/10.36487/ACG_repo/605_37
A number of major open pit hard rock mines have undergone closure over the past few years. These closed
operations provide a unique opportunity to compare actual geochemical conditions with those predicted, and
to identify factors which had the greatest influence on the success of closure implementation. This paper
presents an overview of the open pit closure programs for the Sleeper mine in Nevada USA; the Golden
Cross mine in New Zealand; and the Kori Kollo mine in Bolivia. In each of these cases, the local climate
had a significant influence on the closure measures selected. Sleeper was the first of the current generation
of large open pit gold mines in the western United States. The mine was rapidly flooded and a productive
200 m deep lake has been created. Golden Cross includes an open pit and several phases of underground
workings, dating from the early 1900s. Following closure, the pit is allowed to free drain to an adjacent
river. Kori Kollo lies next to the Rio Desaguadero and was the largest open pit mine on the Andean
altiplano. Upon closure, it was necessary to design a flooding program to induce stratification in the pit lake.
Jacques, D., Šimünek, J., Mallants D. and van Genuchten, M.T. (2003) The HYDRUS-PHREEQC multicomponent
transport model for variably-saturated porous media: code verification and application. In: E. Poeter, Z. Zheng,
M. Hill, J. Doherty (eds), MODFLOW and more: understanding through modeling: conference proceedings,
International Ground Water Modeling Center, Colorado School of Mines, September 16-19, 2003, Colorado
School of Mines, Golden, pp. 23-27.
Mine Closure and Reclamation
― Some Practical Examples in Different Climatic Settings
S. Barrett, et al.
462 Mine Closure 2006, Perth, Australia