William (Bill) Roscoe


William (Bill) Roscoe


Vale Medal for Meritorious Contributions to Mining


CIM Fellowship


Robert Elver Mineral Economics Award


CIM Distinguished Lecturers

Bill Roscoe is a Geologist with more than 50 years of experience in the mining industry in Canada and internationally. After working as an exploration geologist and consultant, he co-founded Roscoe Postle Associates Inc. (RPA) in 1985 and served as president, chairman, and chairman emeritus until its acquisition by SLR Consulting in 2019. He was instrumental in growing RPA into a nationally and internationally recognized geological and mining consulting firm with offices in Toronto, Vancouver, Denver, and London UK.

Since 1999 Roscoe has been co-chair of the CIM Special Committee on Valuation of Mineral Properties (CIMVAL). The CIMVAL Standards are now globally recognized and referenced by the TSX-V and other international stock exchanges. He represents CIMVAL on the International Mineral Valuation Committee (IMVAL) and is a past chair.

Roscoe has published many papers and given numerous presentations and workshops over the past 40 years in Canada and internationally on valuation of mineral properties and mineral resource estimation. He taught a course for five years on mineral resource estimation as an adjunct professor at the University of Toronto.

Roscoe has a B.Sc. (Eng.) from Queen’s University and M.Sc. and Ph.D. degrees from McGill University, all in geological sciences.  He is a P.Eng. in Ontario and British Columbia and a Life Member of CIM, PDAC, and the Association of Mineral Exploration BC.

Distinguished Lecturer 2003-2004

The Development of a Canadian Code and Guidelines for Valuation of Mineral Properties

Lecture Abstract


Following the Bre-X “gold salting” fiasco, the Mining Standards Task Force of the Toronto Stock Exchange and the Ontario Securities Commission in its Final Report (January 1999) recommended that the Canadian Institute of Mining, Metallurgy and Petroleum (CIM) establish a committee to review and advise on approaches and methodologies for the valuation of mineral properties. On May 5, 1999 at the Calgary Annual General Meeting, CIM Council approved the formation of a Special Committee on Valuation of Mineral Properties (CIMVal) to be co-chaired by Keith Spence (Chairman of the CIM Mineral Economics Society) and Dr. William Roscoe (Roscoe Postle Associates Inc.). The mandate of CIMVal is to recommend Standards and Guidelines for Valuation of Mineral Properties to be used by the mining industry in general and to be adopted by Canadian Securities regulators and Canadian stock exchanges.

An important factor in assessing the type of approach or method to be utilized in the valuation of a mineral property; is its stage of development. Mineral properties can be viewed as a continuum from a very early stage exploratory concession to a late stage producing operation. As the continuum moves from early stage to late stage, the quantity and quality of information; and the confidence level of that data increases. Hence it is vital that the correct valuation method or methods be applied at the correct stage. The presentation will therefore examine the criteria and rationale for choosing the appropriate valuation approach or methods, at the various stages of development of the property. A Valuation may be required for various reasons, including the transfer of a state owned mining asset to a private entity or a foreign entity, or acquisition transactions among companies. In addition, in various countries; valuations may be required for merger and acquisitions transactions, stock market transactions, fairness opinions, taxation purposes, court litigation, assessment of bank security, insurance claims, government expropriation, accounting purposes, initial public offerings (IPO’s) and asset disposals.

A Valuation attempts to determine how much a project is worth in dollars or other currencies. The presentation will also provide an overview of Valuation of Mining Properties. Issues covered will include; the basis of value, standards and guidelines, approaches, methods and a brief international perspective.