The Company depreciates and amortizes the capitalized cost of these assets, using the straight-line method as follows:
Asset ClassificationEstimated Useful Life
Buildings and building improvements 
Buildings
20-42 years
Leasehold and building improvements
2-45 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, 2025December 31, 2024
Land$193,438 $184,191 
Asset retirement costs (non-landfill)40,232 38,705 
Landfill assets278,700 258,138 
Buildings and improvements (1)
753,404 719,439 
Vehicles (2)
1,583,387 1,455,530 
Equipment (3)
2,652,027 2,600,085 
Construction in progress90,182 70,305 
5,591,370 5,326,393 
Less - accumulated depreciation and amortization3,050,303 2,878,452 
Total property, plant and equipment, net$2,541,067 $2,447,941 
___________________________________
(1) Balances inclusive of gross ROU assets classified as finance leases of $8.0 million in both periods.
(2) Balances inclusive of gross ROU assets classified as finance leases of $294.2 million and $230.5 million, respectively.
(3) Balances inclusive of gross ROU assets classified as finance leases of $17.4 million and $9.2 million, respectively.
Free Sentinel

Want the next CLEAN HARBORS INC pp&e disclosure the moment it drops?

Set a Sentinel and we'll alert you the moment CLEAN HARBORS INC's next filing hits EDGAR. No credit card, your email never gets sold.

Track for free

About PP&E Disclosures

The PP&E disclosure details a company's physical asset base — land, buildings, machinery, and equipment — along with the depreciation methods and useful life assumptions that determine how these costs flow through the income statement. Capitalization policy thresholds reveal management's judgment on the boundary between expense and asset, directly affecting both reported earnings and asset values.

Key signals: changes in estimated useful lives or depreciation methods can materially shift reported earnings without any operational change. Compare capital expenditures against depreciation expense — when capex consistently trails depreciation, the asset base may be aging and underinvested. Watch for large asset impairments or write-downs that signal overvalued carrying amounts. Asset retirement obligations reveal future environmental or decommissioning costs that are often underappreciated. Compare PP&E intensity (PP&E-to-revenue) against industry peers to assess capital efficiency and competitive positioning.