EDGAR SUPPORTING DOCUMENT

POWER OF ATTORNEY


KNOW ALL BY THESE PRESENTS, that the undersigned hereby
constitutes and appoints David A. Westerlund and Charles E. Baker and
Robert W. McClelland, and each of them acting or signing alone, as his
or her true and lawful attorney-in-fact to:

(1) execute for and on behalf of the undersigned, in the
undersigned's capacity as a director of Ball Corporation (the
"Company"), any and all reports required to be filed by the undersigned
in accordance with Section 16(a) of the Securities Exchange Act of 1934
and the rules thereunder;

(2) do and perform any and all acts for and on behalf of the
undersigned which may be necessary or desirable to complete and
execute any such Form 3, 4 or 5 or other required report and timely file
such report with the United States Securities and Exchange Commission
and any stock exchange or similar authority; and

(3) take any other action of any type whatsoever in connection
with the foregoing which, in the opinion of such attorney-in-fact, may be
of benefit to, in the best interest of, or legally required by, the
undersigned, it being understood that the documents executed by such
attorney-in-fact on behalf of the undersigned, pursuant to this Power of
Attorney, shall be in such form and shall contain such terms and
conditions as such attorney-in-fact may approve in his discretion.

The undersigned hereby grants to each such attorney-in-fact full power
and authority to do and perform each and every act and thing whatsoever
requisite, necessary, and proper to be done in the exercise of any of the
rights and powers herein granted, as fully to all intents and purposes as
the undersigned might or could do if personally present, with full power
of substitution or revocation, hereby ratifying and confirming all that such
attorney-in-fact, or his or her substitute or substitutes, shall lawfully do or
cause to be done by virtue of this Power of Attorney and the rights and
powers herein granted. The undersigned acknowledges that no such
attorney-in-fact, in serving in such capacity at the request of the
undersigned, is hereby assuming, nor is the Company hereby assuming,
any of the undersigned's responsibilities to comply with Section 16 of the
Securities Exchange Act of 1934.

This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file reports under Section 16 with
respect to the undersigned's holdings of and transactions in securities
issued by the Company, unless earlier revoked by the undersigned in a
signed writing delivered to the foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of
Attorney to be executed as of this day of January 2005.

Signature: /s/ George A. Sissel

Printed Name: George A Sissel