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Asset Retirement Obligations
 12 Months Ended
Dec. 31, 2023
Asset Retirement Obligation Disclosure [Abstract]  
Asset retirement obligations 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):

 

 

December 31, 2023

 

 

December 31, 2022

 

Asset retirement obligations, beginning of period

$

39,823

 

 

$

34,929

 

Additions

 

237

 

 

 

—

 

Accretion expense

 

1,774

 

 

 

1,494

 

Revisions in estimated cash flows

 

—

 

 

 

3,400

 

Asset retirement obligations, end of period

$

41,834

 

 

$

39,823