Exhibit 99-11

                        CERTIFICATION OF PERIODIC REPORT

I, Anthony F. Earley, Jr., Chairman, President, Chief Executive and Chief
Operating Officer of DTE Energy Company (the "Company"), certify, pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, that to
the best of my knowledge and belief:

(1) the Quarterly Report on Form 10-Q of the Company for the quarterly period
    ended March 31, 2003 (the "Report") fully complies with the requirements of
    Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m
    or 78o(d)); and

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

Dated: May 14, 2003                          /s/ ANTHONY F. EARLEY, JR.
                                       -----------------------------------------
                                                Anthony F. Earley, Jr.
                                       Chairman, President, Chief Executive and
                                         Chief Operating Officer of DTE Energy
                                                       Company