Asset Retirement Obligations

3 Months Ended

Mar. 31, 2022

Asset Retirement Obligation Disclosure [Abstract]

Asset retirement obligations

18.Asset retirement obligations

The Company’s asset retirement obligation represents the present value of estimated future costs associated with the decommissioning of the Northeast Gateway Deepwater LNG Port in the Massachusetts Bay. In accordance with the port's license and permits, the Company is legally required to decommission the port and estimates that this will occur at the end of the related pipeline capacity agreement in 2032.

The following table presents the balances for asset retirement obligations and the changes due to accretion expense (in thousands):

	March 31, 2022		December 31, 2021
Asset retirement obligations, beginning of period	$	34,929	$	33,499
Accretion expense		367		1,430
Asset retirement obligations, end of period	$	35,296	$	34,929