QuickLinks -- Click here to rapidly navigate through this document


Exhibit 99.1

        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 6th 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