Exhibit 15(b)
May 10, 2012
Securities and Exchange Commission
100 F Street, N.E.
Washington, DC 20549
Commissioners:
We are aware that our report dated April 30, 2012 on our review of condensed consolidated interim financial information of Tucson Electric Power Company (the “Company”) for the three month period ended March 31, 2012 and 2011 and included in the Company’s quarterly report on Form 10-Q for the quarter ended March 31, 2012, is incorporated by reference in its Registration Statement on Form S-3 dated May 10, 2012.
Very truly yours,
/s/ PricewaterhouseCoopers LLP
PricewaterhouseCoopers LLP