Exhibit 99.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of the Duke Energy Retirement Savings Plan (“the Plan”) on Form 11-K for the period ended December 31, 2002 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Charlotte M. Wayland, Chairman, Duke Energy Benefits Committee, certify, pursuant to 18 U.S.C. section 1350, as adopted pursuant to section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of section 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Plan.

/s/    CHARLOTTE M. WAYLAND

Chairman, Duke Energy Benefits Committee

Plan Administrator

June 27, 2003