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PROPERTY, PLANT AND EQUIPMENT | 12 Months Ended
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Dec. 31, 2022
Property, Plant and Equipment [Abstract] |
PROPERTY, PLANT AND EQUIPMENT | PROPERTY, PLANT AND EQUIPMENTA summary of property, plant and equipment is as follows:
| December 31,
| 2022 |  | 2021
Land | $ | 37,321 |  |  | $ | 34,118 |
Landfills | 730,914 |  |  | 677,023 |
Finance lease right-of-use assets | 90,362 |  |  | 78,851 |
Buildings and improvements | 209,234 |  |  | 187,810 |
Machinery and equipment | 243,359 |  |  | 207,305 |
Rolling stock | 276,282 |  |  | 252,642 |
Containers | 197,834 |  |  | 179,949 |
| 1,785,306 |  |  | 1,617,698 |
Less: accumulated depreciation and amortization | (1,064,756) |  |  | (973,094) |
| $ | 720,550 |  |  | $ | 644,604 |
Depreciation expense for fiscal years 2022, 2021 and 2020 was $78,139, $62,342 and $54,370, respectively. Landfill amortization expense for fiscal years 2022, 2021 and 2020 was $31,619, $30,295 and $27,520, respectively.

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=126982197&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI https://asc.fasb.org/topic&trid=2155823 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126982197&loc=SL120174063-112916 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 1 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=126982197&loc=d3e99779-112916 + Details
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