Survey of Energy Resources 2007
Proved amount in place is the resource remaining in known deposits that has been carefully measured and assessed as exploitable under present and expected local economic conditions with existing available technology.
Maximum depth of deposits and minimum seam thickness relate to the proved amount in place.
Proved recoverable reserves are the tonnage within the proved amount in place that can be recovered in the future under present and expected local economic conditions with existing available technology.
Estimated additional amount in place is the indicated and inferred tonnage additional to the proved amount in place that is of foreseeable economic interest. It includes estimates of amounts which could exist in unexplored extensions of known deposits or in undiscovered deposits in known coal-bearing areas, as well as amounts inferred through knowledge of favourable geological conditions. Speculative amounts are not included.
Estimated additional reserves recoverable is the tonnage within the estimated additional amount in place that geological and engineering information indicates with reasonable certainty might be recovered in the future.
The quantifications of reserves and resources presented in the tables that follow incorporate, as far as possible, data reported by WEC Member Committees. Such data will reflect the respective Member Committees' interpretation of the above Definitions in the context of the reserves/resources information available to them, and the degree to which particular countries' terminology and statistical conventions are compatible with the WEC specifications.