Nahir, M, O'Kane, M & Ayres, B 2011, 'Development of a technical guidance document for cover system design in cold regions', in AB Fourie, M Tibbett & A Beersing (eds), Mine Closure 2011: Proceedings of the Sixth International Conference on Mine Closure
, Australian Centre for Geomechanics, Perth, pp. 503-511, https://doi.org/10.36487/ACG_rep/1152_53_OKane
The Contaminated Sites Programme of Indian and Northern Affairs Canada (INAC-CSP) is responsible for closure of contaminated sites on Crown land throughout the Canadian North. A significant percentage of the closure liabilities faced by Indian and Northern Affairs Canada (INAC) is associated with abandoned mines. Of these mine-related liabilities, at least one third involve the need to construct earthen cover systems over potentially reactive tailings and waste rock. INAC will be implementing cover systems at some sites in the very near future and therefore requires information on key physical, chemical, and biological processes that may affect long-term risk to these cover systems. This paper describes the technical guidance approach for cover systems in cold regions that is being developed by INAC with the assistance of a Technical Advisory Group (TAG). The focus of the paper is on the cover system design philosophy including the need to develop site specific closure objectives and criteria, mine closure planning and progressive reclamation, utilising attributes of cold regions, designing for sustainability, importance of final landform design, and assessment period and design life.
Andersland, O.B. and Ladanyi, B. (2004) Frozen ground engineering, John Wiley & Sons, Inc., Hoboken, New Jersey, 363 p.
Ayres, B., Dobchuk, B., Christensen, D., O’Kane, M. and Fawcett, M. (2006) Incorporation of natural slope features into the design of final landforms for waste rock stockpiles, in Proceedings 7th International Conference for Acid Rock Drainage, 26–30 March, St. Louis, MO, USA, pp. 59–75.
Ayres, B.K., O’Kane, M. and Barbour, S.L. (2004) Issues for consideration when designing a growth medium layer for a reactive mine waste cover system, Proceedings 11th International Conference on Tailings and Mine Waste,
10–13 October, Vail, Colorado.
Brown, R.J.E. and Kupsch, W.O. (1974) Permafrost Terminology, Natural Research Council of Canada, Ottawa, Ontario, 62 p.
Carey, S.K. and Woo, M.K. (2001) Spatial variability of hillslope water balance, Wolf Creek basin, subarctic Yukon, Hydrological Processes, Vol. 15, pp. 3113–3132.
Elshorbagy, A. and Barbour, S.L. (2006) Risk and uncertainty-based assessment of the hydrologic performance of reconstructed watersheds, Paper submitted to ASCE Journal of Geotechnical and Geoenvironmental Engineering (under review).
Gibson, J.J., Edwards, T.W.D. and Prowse, T.D. (1993) Runoff generation in a high boreal wetland in northern Canada, Nordic Hydrology, Vol. 24, pp. 213–224.
INAP (2003) International Network for Acid Prevention Evaluation of the long-term performance of dry cover systems, final report, Prepared by O’Kane Consultants Inc., Report No. 684–02, March 2003.
McFadden, J.P., Chapin III, F.S. and Hollinger, D.Y. (1998) Subgrid-scale variability in the surface energy balance of arctic tundra, Journal of Geophysical Research, Vol. 103(22), pp. 947–961.
MEND 1.61.5a (2009) Mine waste covers in cold regions, Mine Environmental Neutral Drainage (MEND) Programme, March 2009.
MEND 1.61.5b (2010) Cold regions cover research – Phase 2, Mine Environmental Neutral Drainage (MEND) Programme, November 2010.
MEND 2.21.4 (2004) Design, construction and performance monitoring of cover systems for waste rock and tailings, Mine Environmental Neutral Drainage (MEND) Programme, July 2004.
Slaughter, C.W. and Kane, D.L. (1979) Hydrologic role of shallow organic soils in cold climates, Proceedings Canadian Hydrology Symposium 79–Cold Climate Hydrology, National Research Counsil of Canada, Ottawa,
Taylor, G., Spain, A., Nefiodovas, A., Timms, G., Kuznetsov, V. and Bennett, J. (2003) Determination of the reasons for deterioration of the Rum Jungle waste rock cover, Australian Centre for Mining Environmental Research, Brisbane.
Vourlitis, G.L. and Oechel, W.C. (1999) Eddy covariance measurements of CO2 and energy fluxes of an Alaskan tussock tundra ecosystem, Ecology, Vol. 80 (2), pp. 686–701.
Washburn, A.L. (1973) Periglacial processes and environments, Edward Arnold Ltd., London, England, 320 p.
Wilson, G.W. (2008) Why are we still struggling with ARD? Geotechnical News, BiTech Publishers Ltd., Vancouver, Canada, June 2008, pp. 51–56.
Wilson, G.W., Williams, D.J. and Rykaart, E.M. (2003) The integrity of cover systems–An update, Proceedings 6th International Conference for Acid Rock Drainage, 12–18 July, Cairns, North Queensland, Australia, pp. 283–291.
Yamazaki, T., Nishida, A. and Kondo, J. (1998) Seasonal frost depth of grounds with the bare surface, snow cover and vegetation, Journal of Japanese Society of Snow and Ice, Vol. 60, pp. 213–224 (in Japanese with English summary).
Zhang, Y., Carey, S.K. and Quinton, W.L. (2008) Evaluation of the algorithms and parameterisations for ground thawing and freezing simulation in permafrost regions, Journal of Geophysical Research, Vol. 113, D17116,