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2003

Kempton, H.

Many operating hard-rock sulfide mines are predicted to require perpetual post-closure management to prevent environmental degradation. Causes include evaporative concentration of metals and other solutes in pit lakes, and acid rock drainage from sulfide waste-rock, tailings, and pit benches....

2003

Santomartino, S., Webb, J.

Anoxic limestone drains (ALDs) have been widely used in the passive treatment of acid mine drainage (AMD), but their effectiveness has often been less than anticipated. Iron hydroxide often precipitates around limestone particles and inhibits neutralisation. To determine the conditions under...

2003-01-01

Wels, C., Lefebvre, R., Robertson, A. M.

Air movement and associated oxygen transport through waste rock dumps has the potential to significantly enhance the rate of oxidation of pyrite-bearing material. While this is a desired outcome for most heap leach operations, airflow in waste rock storage facilities can result in significant...

2003

Desmier, R., Dixon, J., Macdonald, B. C. T., Melville, M. D., Waite, T. D.

The acidic and metal rich waters that are generated from acid sulfate soil (ASS) drainage can have damaging impacts upon ecosystems. The most obvious impact has been the discolouration of water and occasional fish kills. ASS’s produce these acidic and metal rich waters when pyrite in soil is...

2003-01-01

Shaw, S., Wels, C., Robertson, A., Fortin, S., Walker, B.

A background characterisation study was carried out in the Sangre de Cristo mountains, New Mexico, to: 1. quantify naturally occurring contaminant loads from mineralised areas; 2. define site-specific background concentrations; and 3. to determine key factors controlling spatial and temporal...

2003

Kwong, Y. T. J., Hynes, T. P.

Submarine tailings disposal is conceptually an attractive option for managing reactive mine wastes in coastal regions by virtue of reduced sulfide oxidation under a water cover and no infrastructure to maintain after mine closure. However, the lack of detailed knowledge of metal leaching,...

2003

Rykaart, E. M., Wilson, G. W., Currey, N., Ritchie, P.

Kidston Gold Mine in Queensland, Australia has a 310 ha tailings impoundment that has undergone final closure rehabilitation. Kidston Gold Mine evaluated their closure options for this low acid generating tailings impoundment, and due to a lack of cover soils and the cost of importing material,...

2003

Morin, K. A., Hutt, N. M., Coulter, T. S., Tekano, W. M.

The Vancouver Island Highway Project (VIHP) was a $CAD 1.2 billion expenditure by the Province of British Columbia to improve travel safety and relieve traffic congestion between Victoria and Campbell River on Vancouver Island. In the section of highway between the Tsolum River and Oyster River,...

2003

Waygood, C., Swiegelaar, N.

Loubert Witbank is a defunct coal mine situated near Ermelo in South Africa. Mining ceased in 1992, and within a short period acidic decant occurred, with a significant impact on the regional catchment. The problem was studied during 1996/1997, and the site remediated in 2001/2002 by the...

2003

Usher, B. H., Hodgson, F. D. I.

Twenty-seven observation test pits were excavated at four different spoils dumps at three collieries in the Witbank Coalfield. The holes were dug into the upper three metres of the spoils to ascertain if any weathering profiles, variation with age or influence of topsoil covering could be gauged....