PROPERTY, PLANT AND EQUIPMENT (Tables)

6 Months Ended

Jun. 30, 2022

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant and Equipment

Property, plant and equipment consisted of the following (in thousands):

	June 30, 2022		December 31, 2021
Land	$	174,744	$	165,010
Asset retirement costs (non-landfill)	19,598		19,105
Landfill assets	214,558		205,873
Buildings and improvements (1)	571,078		551,795
Camp equipment	124,672		127,680
Vehicles (2)	950,754		912,836
Equipment (3)	2,136,376		2,092,395
Furniture and fixtures	6,574		6,444
Construction in progress	98,189		60,447
	4,296,543		4,141,585
Less - accumulated depreciation and amortization	2,383,398		2,278,410
Total property, plant and equipment, net	$	1,913,145	$	1,863,175

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(1) Balances inclusive of gross right-of-use ("ROU") assets classified as finance leases of $8.0 million and $8.9 million respectively.

(2) Balances inclusive of gross ROU assets classified as finance leases of $85.3 million and $77.7 million, respectively.

(3) Balances inclusive of gross ROU assets classified as finance leases of $9.3 million in both periods.