Commitments and Contingencies, Long-Term Power Sales Contracts, Litigation (Tables)

6 Months Ended

Jun. 30, 2011

Commitments and Contingencies, Long-Term Power Sales Contracts, Litigation

Contracts for procurement of electricity

Contract Duration	Percentage of Estimated Requirements
From July 1, 2011 to May 2012		100	%
From June 2012 to September 2012		75
From October 2012 to May 2013		50
From June 2013 to September 2013		25