Watson, AH 2006, 'Better Closure Cost Estimates', in AB Fourie & M Tibbett (eds), Proceedings of the First International Seminar on Mine Closure
, Australian Centre for Geomechanics, Perth, pp. 493-497, https://doi.org/10.36487/ACG_repo/605_41
The most important element of sustainability in mining is that we stay in business. There are over 23000
abandoned mine openings from activity pre-1970, in the State of Colorado alone. Those early miners did not
consider the cost associated with any activity external to the extraction of ore, and made no provision for
retiring their mining assets when the lode played out. Approximately 3500 of those disturbances have been
closed with Federal and State funds since the inactive mines program was implemented in the 1980s, and the
State of Colorado is responsible for closing the rest of them eventually. There are currently approximately
6000 mines in Colorado permitted under the post-1970s mining law, requiring reclamation bonding. This is
just one example of the many mining districts around the world where we have work to do.
Anonymous (2006) Mined land reclamation in Colorado: an overview. State of Colorado division of minerals and
Bartos, P. (2003) Quoted in Hard Rock Miner's Handbook Rules of Thumb, Edition 3. Mackintosh Engineering, rule
PMI (2000) Project Management Body of Knowledge (PMBOK) 3rd Edition, Project Management Institute, Chapter 5.
Rad, P. (2002) Project Estimating and Cost Management, Management Concepts, Vienna (USA), pp. 43-66.
Akintola, A. and Fitzgerald, E. (2000) A survey of current cost estimating practices in the UK, Construction
Management & Economics, 2000, Vol. 18, Issue 2, Taylor and Francis, London, pp. 161-172.
Lorance, R. and Wendling, R. (1999) Basic Techniques for Analyzing and Presentation of Cost Risk Analysis, Crystal
Mine Closure 2006, Perth, Australia 497