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Mineral Properties, Plant and Equipment (Tables) | 12 Months Ended
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Dec. 31, 2019
Text Block [Abstract] |
Detailed Information About In Property Plant And Equipment |
|  | Mineral properties |  |  | Plant and equipment |  |  | Pre- development assets |  |  | Construction in-progress |  |  | Other |  |  | Total |
Cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance – December 31, 2017 |  | $ | 72,592 |  |  | $ | 47,873 |  |  | $ | 44,194 |  |  | $ | - |  |  | $ | 223 |  |  | $ | 164,882 |
Acquisition of Mesquite (note 5(b)) |  |  | 27 |  |  |  | 43,167 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 43,194 |
Additions |  |  | 308 |  |  |  | 2,285 |  |  |  | - |  |  |  | 123,124 |  |  |  | 38 |  |  |  | 125,755 |
Impairment |  |  | - |  |  |  | (4,448 | ) |  |  | - |  |  |  | (206 | ) |  |  | (13 | ) |  |  | (4,667) |
Transfers |  |  | - |  |  |  | - |  |  |  | (44,194 | ) |  |  | 44,194 |  |  |  | - |  |  |  | - |
Disposals |  |  | - |  |  |  | (9,270 | ) |  |  | - |  |  |  | (570 | ) |  |  | (89 | ) |  |  | (9,929) |
Change in reclamation cost asset |  |  | 1,465 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 1,465 |
Balance – December 31, 2018 |  | $ | 74,392 |  |  | $ | 79,607 |  |  | $ | - |  |  | $ | 166,542 |  |  | $ | 159 |  |  | $ | 320,700 |
Additions |  |  | 16,924 |  |  |  | (6,641 | ) |  |  | - |  |  |  | 78,748 |  |  |  | 942 |  |  |  | 89,973 |
Transfers |  |  | 55,318 |  |  |  | 133,694 |  |  |  | - |  |  |  | (200,038 | ) |  |  | 1,089 |  |  |  | (9,937) |
Transfer from exploration and evaluation assets (note 9) |  |  | 133,060 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 133,060 |
Disposals |  |  | - |  |  |  | (1,758 | ) |  |  | - |  |  |  | - |  |  |  | (74 | ) |  |  | (1,832) |
Change in reclamation cost asset |  |  | 6,080 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 6,080 |
Balance – December 31, 2019 |  | $ | 285,774 |  |  | $ | 204,902 |  |  | $ | - |  |  | $ | 45,252 |  |  | $ | 2,116 |  |  | $ | 538,044 |
Accumulated depreciation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance – December 31, 2017 |  | $ | - |  |  | $ | 1,167 |  |  | $ | - |  |  | $ | - |  |  | $ | 43 |  |  | $ | 1,210 |
Additions |  |  | 326 |  |  |  | 4,135 |  |  |  | - |  |  |  | - |  |  |  | 87 |  |  |  | 4,548 |
Disposals |  |  | - |  |  |  | (1,939 | ) |  |  | - |  |  |  | - |  |  |  | (30 | ) |  |  | (1,969) |
Balance – December 31, 2018 |  | $ | 326 |  |  | $ | 3,363 |  |  | $ | - |  |  | $ | - |  |  | $ | 100 |  |  | $ | 3,789 |
Additions |  |  | 12,682 |  |  |  | 24,136 |  |  |  | - |  |  |  | - |  |  |  | 294 |  |  |  | 37,112 |
Disposals |  |  | - |  |  |  | (766 | ) |  |  | - |  |  |  | - |  |  |  | (35 | ) |  |  | (801) |
Balance – December 31, 2019 |  | $ | 13,008 |  |  | $ | 26,733 |  |  | $ | - |  |  | $ | - |  |  | $ | 359 |  |  | $ | 40,100 |
Net book value: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
At December 31, 2018 |  | $ | 74,066 |  |  | $ | 76,244 |  |  | $ | - |  |  | $ | 166,542 |  |  | $ | 59 |  |  | $ | 316,911 |
At December 31, 2019 |  | $ | 272,766 |  |  | $ | 178,169 |  |  | $ | - |  |  | $ | 45,252 |  |  | $ | 1,757 |  |  | $ | 497,944 |
Detailed Information About In Significant Royalty Arrangement | Certain of the Company’s mining properties are subject to royalty arrangements based on their net smelter returns (“NSR”s) or gross revenues. At December 31, 2019, the Company’s significant royalty arrangements were as follows:
Mineral property |  | Royalty arrangements
Mesquite |  | 0.5%-7% NSR
Aurizona |  | 1.5% of gross sales; 3%-5% sliding scale NSR based on gold price
Castle Mountain |  | 2.65% NSR

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