ACCRUED FINAL CAPPING, CLOSURE AND POST CLOSURE

6 Months Ended

Jun. 30, 2023

Asset Retirement Obligation Disclosure [Abstract]

ACCRUED FINAL CAPPING, CLOSURE AND POST CLOSURE

ACCRUED FINAL CAPPING, CLOSURE AND POST CLOSURE

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 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.

A summary of the changes to accrued final capping, closure and post-closure liabilities follows:

	Six Months Ended June 30,
	2023		2022
Beginning balance	$	113,678	$	86,914
Obligations incurred	2,615		2,244
Revision in estimates (1)	—		1,443
Accretion expense	4,809		3,799
Obligations settled (2)	(2,386)		(2,027)
Ending balance	$	118,716	$	92,373

(1)Relates to a change in estimates concerning anticipated capping costs at one of our landfills.

(2)May include amounts that are being processed through accounts payable as a part of our disbursements cycle.