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Appendix I<br />

Criteria<br />

Commentary<br />

• It is recognised that this may not be possible or appropriate in all<br />

circumstances. These statements of relative accuracy and confidence of<br />

the estimate should be compared with production data, where available.<br />

• Coal production at UHG commenced in April 2009, and since this time some<br />

202 Mbcm of waste and 37 Mt of ROM coal has been mined to date until 30<br />

November 2015.<br />

• Since the preparation of the last Reserves estimate effective as of 31 December<br />

2012 the UHG mine has completed reconciliations of actual coal mined against<br />

the geological model for the period January 2014 to June 2015.<br />

• As a result of the reconciliations that have been undertaken and the observations<br />

made associated with the mining activities over this period of time, the mining<br />

modifying factors in this Reserves estimate have been adjusted to be less<br />

conservative particularly with respect to assumed losses incurred in the “affected<br />

zones”, and in the assumed reassignment of coking coal to thermal coal.<br />

212<br />

Annual Report 2015

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