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Commitments and Contingencies (Tables)
6 Months Ended
Jun. 30, 2012
Commitments and Contingencies  
Schedule of coal, natural gas and transportation contracts

 

Coal, Natural Gas and Transportation Contracts

 

(as of June 30, 2012, in millions)

 

Firm physical gas and
transportation contracts

 

Coal and coal
transportation contracts

 

July 1, 2012 through December 31, 2012

 

$

19.7

 

$

20.2

 

January 1, 2013 through December 31, 2014

 

45.8

 

47.1

 

January 1, 2015 through December 31, 2016

 

24.5

 

32.2

 

January 1, 2017 and beyond

 

17.8