Annual report pursuant to section 13 and 15(d)

ACCRUED CLOSURE COSTS (Tables)

v2.4.0.6
ACCRUED CLOSURE COSTS (Tables)
12 Months Ended
Dec. 31, 2012
ACCRUED CLOSURE COSTS [Abstract]  
Changes to reported closure liabilities
Changes to reported closure liabilities for the years ended December 31, 2011 and 2012, were as follows:

 
Amounts in thousands
     
Balance as of December 31, 2010
  $ 12,362  
Accretion expense
    79  
Payments
     
Adjustments
    (504 )
Balance as of December 31, 2011
    11,937  
Accretion expense
    185  
Payments
    (773 )
Adjustments
     
Balance as of December 31, 2012
  $ 11,349