PROPERTY, PLANT, AND EQUIPMENT (Tables)

12 Months Ended

Dec. 31, 2022

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant and Equipment

The Company

depreciates and amortizes the capitalized cost of these assets, using the straight-line method as follows:

Asset Classification	Estimated Useful Life
Buildings and building improvements
Buildings	20-42 years
Leasehold and building improvements	2-45 years
Camp and lodging equipment	8-15 years
Vehicles	2-15 years
Equipment
Capitalized software and computer equipment	3-5 years
Containers and railcars	8-16 years
All other equipment	4-30 years
Furniture and fixtures	5-8 years

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

	December 31, 2022		December 31, 2021
Land	$	172,579	$	165,010
Asset retirement costs (non-landfill)	22,001		19,105
Landfill assets	232,872		205,873
Buildings and improvements (1)	584,916		551,795
Camp equipment	116,976		127,680
Vehicles (2)	1,112,188		912,836
Equipment (3)	2,078,088		2,092,395
Furniture and fixtures	6,481		6,444
Construction in progress	140,328		60,447
	4,466,429		4,141,585
Less - accumulated depreciation and amortization	2,486,127		2,278,410
Total property, plant and equipment, net	$	1,980,302	$	1,863,175

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(1) Balances inclusive of gross 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 $106.7 million and $77.7 million, respectively.

(3) Balances inclusive of gross ROU assets classified as finance leases of $9.2 million and $9.3 million, respectively.