ACCRUED FINAL CAPPING, CLOSURE AND POST-CLOSURE COSTS

3 Months Ended

Mar. 31, 2026

Asset Retirement Obligation Disclosure [Abstract]

ACCRUED FINAL CAPPING, CLOSURE AND POST-CLOSURE COSTS

ACCRUED FINAL CAPPING, CLOSURE AND POST-CLOSURE COSTS

Accrued final capping, closure and post-closure costs include the current and non-current portion of costs associated with obligations for final capping, closure and post-closure of our landfills. We estimate our future final capping, closure and post-closure costs of our landfills in order to determine the final capping, closure and post-closure expense per ton of waste placed into each landfill. The anticipated time frame for paying these costs varies based on the remaining useful life of each landfill as well as the duration of the post-closure monitoring period.

The changes to accrued final capping, closure and post-closure liabilities are as follows:

	Three Months Ended March 31,
	2026		2025
Beginning balance	$	192,722	$	172,230
Obligations incurred	2,938		1,698
Accretion expense	3,951		3,654
Obligations settled (1)	(781)		(755)
Ending balance	$	198,830	$	176,827

(1)May include amounts paid and amounts that are being processed through accounts payable as a part of our disbursement cycle.