THE CORPORATE LIBRARY

Related Party Transactions and Outside Related Director Information

Pinnacle West Capital Corporation (PNW)

4/10/2006 Proxy Information

Mr. Gallagher is Chairman Emeritus of Gallagher & Kennedy, P.A., one of many law firms that provided legal services to the Company in 2005. Gallagher & Kennedy, P.A. will continue to provide such services in 2006. Mr. Gallagher himself does not furnish legal services to the Company. Mr. Gallagher has advised the Company that he receives no compensation or benefits from Gallagher and Kennedy, P.A., as a result of the firm providing legal services to the Company.

William L. Stewart served as Chief Executive Officer of Pinnacle West Energy Corporation, a principal subsidiary of Pinnacle West Capital Corporation (Pinnacle), from October 2002 until January 2003 and served as President from October 1999 until January 2003. He retired from Pinnacle on November 26, 2003. Mr. Stewart served as President, Generation, of Arizona Public Service Company (APS), a principal subsidiary of Pinnacle West Capital Corporation, from October 1998 to October 2002 and served as Executive Vice President of Generation of APS from September 1996 to October 1998, as well as Executive Vice President, Nuclear, of APS from May 1994 to September 1996.

4/11/2005 Proxy Information

Mr. Gallagher, who served as a member of the Human Resources Committee for a portion of 2004, is Chairman Emeritus of Gallagher & Kennedy, PA, a law firm which provided legal services to the Company in 2004 and which will provide such services in 2005.

William L. Stewart served as Chief Executive Officer of Pinnacle West Energy Corporation, a principal subsidiary of Pinnacle West Capital Corporation (Pinnacle), from October 2002 until January 2003 and served as President from October 1999 until January 2003. He retired from Pinnacle on November 26, 2003. Mr. Stewart served as President, Generation, of Arizona Public Service Company (APS), a principal subsidiary of Pinnacle West Capital Corporation, from October 1998 to October 2002 and served as Executive Vice President of Generation of APS from September 1996 to October 1998, as well as Executive Vice President, Nuclear, of APS from May 1994 to September 1996.

4/14/2004 Proxy Information

Mr. Gallagher is Chairman Emeritus of Gallagher & Kennedy, PA, a law firm which provided legal services to the Company in 2003 and which will provide such services in 2004.

William L. Stewart served as Chief Executive Officer of Pinnacle West Energy Corporation, a principal subsidiary of Pinnacle West Capital Corporation, from October 2002 until January 2003 and President from October 1999 until January 2003. Mr. Stewart served as President, Generation, of Arizona Public Service Company (APS), a principal subsidiary of Pinnacle West Capital Corporation, from October 1998 to October 2002 and served as Executive Vice President of Generation of APS from September 1996 to October 1998, as well as Executive Vice President, Nuclear, of APS from May 1994 to September 1996.

4/9/2003 Proxy Information

Mr. Gallagher is Chairman Emeritus of Gallagher & Kennedy, PA, a law firm which provided legal services to the Company in 2002 and which will provide such services in 2003. APS had a consulting agreement with Robert G. Matlock & Associates, Inc., of which Mr. Robert G. Matlock is President and Chief Executive Officer and fifty-percent owner. During 2002, the Company paid this company $14,272.00 for consulting services and expenses relating to the Company's nuclear operations. This consulting agreement was mutually terminated as of August 27, 2002.