EDGAR SUPPORTING DOCUMENT

POWER OF ATTORNEY


KNOW ALL BY THESE PRESENTS, that the undersigned
hereby constitutes and appoints. Charles E. Baker and Robert W.
McClelland, and each of them acting or signing alone, as his or

(1) execute for and on behalf of the undersigned, in
the undersigned's capacity as an officer 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 14th day of January
2005.

Signature: /s/ David A. Westerlund

Printed Name: David A. Westerlund