QuickLinks -- Click here to rapidly navigate through this document


Exhibit 99.1


Certificate of Chief Executive and Chief Financial Officers

        The following statement is being made to the Securities and Exchange Commission solely for purposes of Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. 1349), which carries with it certain criminal penalties in the event of a knowing or willful misrepresentation.

Securities and Exchange Commission
450 Fifth Street, NW
Washington, DC 20549

Ladies and Gentlemen:

        In accordance with the requirements of Section 906 of the Sarbanes-Oxley Act of 2002 (18 USC 1349), each of the undersigned hereby certifies that:

Dated as of this 13th day of August 2002.

/s/ Floyd L. English
Floyd L. English
Chairman and Chief Executive Officer
  /s/ Charles R. Nicholas
Charles R. Nicholas
Vice Chairman and Chief Financial Officer



QuickLinks

Certificate of Chief Executive and Chief Financial Officers