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Whitehaven Coal Limited : Annual Report 2010
58 NOTES TO THE FINANCIAL STATEMENTS 30 JUNE 2010 3.S UMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED) j)M ine development costs The cost of acquiring mineral reserves and mineral resources are capitalised on the statement of financial position as incurred. Capitalised costs (development expenditure) include expenditure incurred to expand the capacity of a mine and to maintain production. Mine development costs include acquired proved and probable mineral resources at cost at acquisition date. Mineral reserves and capitalised mine development expenditure are, upon commencement of production, depreciated over the remaining life of mine. The net carrying amounts of mineral reserves and resources and capitalised mine development expenditure at each mine property are reviewed for impairment either individually or at the cash-generating unit level when events and changes in circumstances indicate that the carrying amount may not be recoverable. To the extent to which these values exceed their recoverable amounts, that excess is fully provided against in the financial year in which this is determined. k)I ntangible assets (i) Exploration and evaluation assets Exploration and evaluation costs, including the costs of acquiring licences, are capitalised as exploration and evaluation assets on an area of interest basis. Costs incurred before the consolidated entity has obtained the legal rights to explore an area are recognised in the statement of comprehensive income. Exploration and evaluation assets are only recognised if the rights of the area of interest are current and either: i. the expenditures are expected to be recouped through successful development and exploitation of the area of interest; or ii. activities in the area of interest have not, at the reporting date, reached a stage which permits a reasonable assessment of the existence or otherwise of economically recoverable reserves and active and significant operations in, or in relation to, the area of interest are continuing. Exploration and evaluation assets are assessed for impairment if (i) sufficient data exists to determine technical feasibility and commercial viability, and (ii) facts and circumstances suggest that the carrying amount exceeds the recoverable amount. For the purposes of impairment testing, exploration and evaluation assets are allocated to cash-generating units to which the exploration activity related. The cash generating unit shall not be larger than the area of interest. Once the technical feasibility and commercial viability of the extraction of mineral resources in an area of interest are demonstrable, exploration and evaluation assets attributable to that area of interest are first tested for impairment and then reclassified from intangible assets to mining property and development assets within property, plant and development. (ii) Water access rights The consolidated entity holds water access rights, which have been determined to have an indefinite life. The water access rights have been recognised at cost and are assessed annually for impairment. (iii) Rail access rights Rail access rights have a finite useful life and are carried at cost less, where applicable, any accumulated amortisation and accumulated impairment losses. The carrying values of rail access rights are reviewed to ensure they are not in excess of their recoverable amounts. Rail access rights are amortised over the life of the mine or access agreement using a unit sold basis. (iv) Other intangible assets Other intangible assets that are acquired by the consolidated entity, which have finite useful lives, are measured at cost less accumulated amortisation and accumulated impairment losses. Amortisation is charged to the statement of comprehensive income on a straight line basis over the estimated life of the mining property to which the intangible relates.
Annual Report 2009
Annual Report 2011