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PROPERTY, PLANT AND EQUIPMENT AND MINERAL PROPERTIES | 12 Months Ended
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Dec. 31, 2020
Property, Plant and Equipment [Abstract] |
Plant and Equipment and Mineral Properties | PROPERTY, PLANT AND EQUIPMENT AND MINERAL PROPERTIES The following is a summary of property, plant and equipment:
| December 31, 2020 |  | December 31, 2019
| Cost |  | Accumulated Depreciation |  | Net Book Value |  | Cost |  | Accumulated Depreciation |  | Net Book Value
Property, plant and equipment |  |  |  |  |  |  |  |  |  |  |
Nichols Ranch | $ | 29,210 |  |  | $ | (16,150) |  |  | $ | 13,060 |  |  | $ | 29,210 |  |  | $ | (14,115) |  |  | $ | 15,095 |
Alta Mesa | 13,626 |  |  | (4,088) |  |  | 9,538 |  |  | 13,626 |  |  | (3,179) |  |  | 10,447 |
Equipment and other | 13,528 |  |  | (12,505) |  |  | 1,023 |  |  | 12,900 |  |  | (12,239) |  |  | 661 |
Property, plant and equipment total | $ | 56,364 |  |  | $ | (32,743) |  |  | $ | 23,621 |  |  | $ | 55,736 |  |  | $ | (29,533) |  |  | $ | 26,203 |
The net book value for the Nichols Ranch Project includes the value beyond proven and probable reserves ascribed to the processing plant, the Nichols Ranch wellfields and the Jane Dough project upon acquisition. For the year ended December 31, 2020, the Company recorded $0.51 million (December 31, 2019 - $2.09 million) of depreciation expense related to Nichols Ranch, which is included in the capitalized costs to inventory on the Consolidated Balance Sheet. The following is a summary of mineral properties:
| December 31, 2020 |  | December 31, 2019
Mineral properties |  |  |
Uranerz ISR properties | $ | 25,974 |  |  | $ | 25,974 |
Sheep Mountain | 34,183 |  |  | 34,183 |
Roca Honda | 22,095 |  |  | 22,095 |
Other | 1,287 |  |  | 1,287 |
Mineral properties total | $ | 83,539 |  |  | $ | 83,539 |

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 + Details
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