

10. INVENTORIES

Inventories consist of:



	December 31, 2018		December 31, 2017
Concentrate inventory	$	19,286	$	11,582
Stockpile ore ⁽¹⁾	3,945		16,209
Heap leach inventory and in process ⁽²⁾	113,199		108,509
Doré and finished inventory ⁽³⁾	30,736		35,054
Materials and supplies	47,299		47,361
	$	214,465	$	218,715


(1)	Includes an impairment charge of $11.2 million to reduce the cost basis of inventory to NRV at Manantial Espejo and Dolores mines (December 31, 2017 – $10.0 million at Manantial Espejo mine).


(2)	Includes an impairment charge of $28.9 million to reduce the cost basis of inventory to NRV at Manantial Espejo and Dolores mines (December 31, 2017 - $10.3 million at Manantial Espejo and Dolores mines).


(3)	Includes an impairment charge of $7.5 million to reduce the cost basis of inventory to NRV at Manantial Espejo and Dolores mines at December 31, 2018. (December 31, 2017 - $2.9 million at Manantial Espejo mine).

The costs of inventories recognized as expense for the year ended December 31, 2018 amounted to $683.6 million (2017 – $648.1 million), of which $515.6 million (2017 – $500.7 million) and $147.3 million (2017 – $122.9 million) was included in production costs and depreciation and depletion in the Consolidated Income Statements, respectively.

During the year ended December 31, 2018 a $24.3 million (2017 - $12.3 million NRV loss) NRV loss was recognized, primarily driven by decreased metal prices, and included in production costs (Note 21). Inventories held at NRV amounted to $143.6 million (2017 - $125.5 million).

A portion of the Stockpile ore amounting to $2.5 million (2017 - $9.5 million) and a portion of the heap leach inventory amounting to $75.3 million (2017 - $74.3 million) are expected to be recovered or settled after more than twelve months.