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COMMITMENTS AND CONTINGENCIES (Tables)
 12 Months Ended
Dec. 31, 2013
COMMITMENTS AND CONTINGENCIES  
Schedule of coal, natural gas and transportation contracts
(in millions)
  Firm physical gas
and transportation
contracts		   Coal and coal
transportation
contracts		  

January 1, 2014 through December 31, 2014

   $ 24.9   $ 23.8  

January 1, 2015 through December 31, 2016

   $ 31.4   $ 28.8  

January 1, 2017 through December 31, 2018

   $ 30.2   $ 22.6  

January 1, 2019 and beyond

   $ 45.9   $ 11.3  
Schedule of lease obligations over the next five years

Our lease obligations over the next five years are as follows (in thousands):

 
   Capital
Leases		   Operating
Leases		  

2014

   $ 553   $ 764  

2015

     553     722  

2016

     549     720  

2017

     547     681  

2018

     546     646  

Thereafter

     3,553     485  
           
​ ​ ​ ​ ​ ​ ​ ​

Total minimum payments

     6,301   $ 4,018  

Less amount representing interest

     1,860        
           
​ ​ ​ ​ ​ ​ ​ ​

Present value of net minimum lease payments

   $ 4,441        
           
​ ​ ​ ​ ​ ​ ​ ​
​ ​ ​ ​ ​ ​ ​ ​