Exhibit 99.1

                    CERTIFICATION BY CHIEF EXECUTIVE OFFICER
                       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 Genesis Energy, L.P. (the
"Partnership") on Form 10-Q for the year ended December 31, 2002 (the "Report")
filed with the Securities and Exchange Commission, I, Mark J. Gorman, President
and Chief Executive Officer of Genesis Energy, Inc., the general partner of the
Partnership, 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 13(a) or
         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 Partnership.



March 19, 2003                            /s/ Mark J. Gorman
                                          --------------------------------------
                                          Mark J. Gorman
                                          President and Chief Executive Officer,
                                          Genesis Energy, Inc.