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ASSET RETIREMENT OBLIGATIONS (Tables)
 12 Months Ended
Sep. 30, 2022
Asset Retirement Obligation Disclosure [Abstract]  
Analysis of Change in ARO Liability
The following is an analysis of the change in the Company’s ARO for the fiscal years ended September 30:
20222021
(Thousands)NJNGNJRCEVNJNGNJRCEV
Balance at October 1$41,611 $4,694 $29,280 $4,444 
Accretion2,052 186 1,612 182 
Additions161 281 5,697 68 
Change in assumptions7,339 — 6,151 — 
Retirements(1,289)— (1,129)— 
Balance at period end$49,874 $5,161 $41,611 $4,694 
Schedule of Future Accretion
Accretion for the next five years, for the fiscal years ended September 30, is estimated to be as follows:
Estimated
(Thousands)Accretion
2023$2,767 
20242,900 
20253,038 
20263,180 
20273,328 
Total$15,213