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6. Properties, Plants and Equipment (Details) (USD $) | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Equipment | $ 8,743,951 | $ 6,626,094
Buildings | 1,380,049 | 1,362,555
Mineral Rights | 916,522 | 786,088
Land & Other | 6,393,315 | 5,083,692
Total | 17,433,837 | 13,858,429
Accumulated Depreciation | (5,038,192) | (4,349,454)
Properties, plants and equipment, net | 12,395,645 | 9,508,975
USAC |  |
Equipment | 749,493 | 668,811
Buildings | 242,186 | 241,297
Mineral Rights | 0 | 0
Land & Other | 3,270,248 | 3,251,660
Total | 4,261,927 | 4,161,768
Accumulated Depreciation | (2,333,484) | (2,271,910)
Properties, plants and equipment, net | 1,928,443 | 1,889,858
MEXICO |  |
Equipment | 4,952,524 | 3,086,510
Buildings | 787,917 | 776,374
Mineral Rights | 916,522 | 786,088
Land & Other | 3,123,067 | 1,832,032
Total | 9,780,030 | 6,481,004
Accumulated Depreciation | (987,621) | (578,812)
Properties, plants and equipment, net | 8,792,409 | 5,902,192
BRZ |  |
Equipment | 3,041,934 | 2,870,773
Buildings | 349,946 | 344,884
Mineral Rights | 0 | 0
Land & Other | 0 | 0
Total | 3,391,880 | 3,215,657
Accumulated Depreciation | (1,717,087) | (1,498,732)
Properties, plants and equipment, net | $ 1,674,793 | $ 1,716,925

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- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 14 -Article 5 + Details
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- Definition Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 4 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6812-107765 + Details
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