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ASSET RETIREMENT OBLIGATIONS (Tables)
12 Months Ended
Sep. 30, 2014
Asset Retirement Obligation Disclosure [Abstract]  
Analysis of Change in ARO Liability
The following is an analysis of the change in the ARO liability for the fiscal year ended September 30:
(Thousands)
2014
 
2013
Balance at October 1
$
28,711

 
$
27,983

Accretion
2,012

 
1,892

Additions
925

 
533

Retirements
(1,153
)
 
(1,697
)
Balance at period end
$
30,495

 
$
28,711


Schedule of Future Accretion
Accretion for the next five years is estimated to be as follows:
(Thousands)
 
 
 
Fiscal Year Ended September 30,
Estimated Accretion
2015
 
$
2,075

 
2016
 
2,139

 
2017
 
2,194

 
2018
 
2,248

 
2019
 
2,303

 
Total
 
$
10,959