Exhibit 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in Registration Statement No. 333-132933 on Form S-8 of our report dated June 28, 2007, appearing in this Annual Report on Form 11-K of Duke Energy Retirement Savings Plan for the year ended December 31, 2006.
Charlotte, North Carolina
/s/ DELOITTE & TOUCHE LLP
June 28, 2007