Historical Bids and Offers

July 2011 HA Nonfirm	July 2011 DA Firm LD	July 2011 DA Recallable
June 2011 HA Nonfirm	June 2011 DA Firm LD	June 2011 DA Recallable
May 2011 HA Nonfirm	May 2011 DA Firm LD	May 2011 DA Recallable
April 2011 HA Nonfirm	April 2011 DA Firm LD	April 2011 DA Recallable
March 2011 HA Nonfirm	March 2011 DA Firm LD	March 2011 DA Recallable
February 2011 HA Nonfirm	February 2011 DA Firm LD	February 2011 DA Recallable
January 2011 HA Nonfirm	January 2011 DA Firm LD	January 2011 DA Recallable
December 2010 HA Nonfirm	December 2010 DA Firm LD	December 2010 DA Recallable
November 2010 HA Nonfirm	November 2010 DA Firm LD	November 2010 DA Recallable
October 2010 HA Nonfirm	October 2010 DA Firm LD	October 2010 DA Recallable
September 2010 HA Nonfirm	September 2010 DA Firm LD	September 2010 DA Recallable
August 2010 HA Nonfirm	August 2010 DA Firm LD	August 2010 DA Recallable
July 2010 HA Nonfirm	July 2010 DA Firm LD	July 2010 DA Recallable
June 2010 HA Nonfirm	June 2010 DA Firm LD	June 2010 DA Recallable
May 2010 HA Nonfirm	May 2010 DA Firm LD	May 2010 DA Recallable
April 2010 HA Nonfirm	April 2010 DA Firm LD	April 2010 DA Recallable
March 2010 HA Nonfirm	March 2010 DA Firm LD	March 2010 DA Recallable
February 2010 HA Nonfirm	February 2010 DA Firm LD	February 2010 DA Recallable
January 2010 HA Nonfirm	January 2010 DA Firm LD	January 2010 DA Recallable
December 2009 HA Nonfirm	December 2009 DA Firm LD	December 2009 DA Recallable
November 2009 HA Nonfirm	November 2009 DA Firm LD	November 2009 DA Recallable
October 2009 HA Nonfirm	October 2009 DA Firm LD	October 2009 DA Recallable
September 2009 HA Nonfirm	September 2009 DA Firm LD	September 2009 DA Recallable

August 2009 HA Nonfirm	August 2009 DA Firm LD	August 2009 DA Recallable
July 2009 HA Nonfirm	July 2009 DA Firm LD	July 2009 DA Recallable

Note: Hourly prices are in $/MWH; daily prices prior to 1/4/2010 are in MMBTU/MWH; daily prices since 1/4/2010 are in $/MWH