KOPPERS HOLDINGS INC.
Limited Power of Attorney
SECTION 16a FILINGS



Know all by these presents, that the undersigned hereby constitutes and
appoints each of Stephanie L. Apostolou and Bradley A. Pearce, signing singly,
the undersigneds true and lawful attorney in fact to

1 Execute for and on behalf of the undersigned, in the undersigneds
capacity as an officer, director and or stockholder of Koppers Holdings Inc.
the Company, Forms 3, 4, and 5 and amendments thereto in accordance with
Section 16a 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 amendment thereto including, but not limited to, executing a Form ID
and or Authentication Document, and timely file such forms or documents with
the United States Securities and Exchange Commission the SEC and any stock
exchange or similar authority; and

3 Take any other action of any type whatsoever which, in the opinion of
such attorney in fact, may be necessary or desirable in connection with the
foregoing authority, 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.

The undersigned hereby grants to each such attorney in fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary, or 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 such attorney in facts 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
the foregoing attorneys in fact, in serving in such capacity at the request
of the undersigned, are not assuming, nor is the Company assuming, any of
the undersigneds 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 Forms 3, 4, and 5 with respect to
the undersigneds holdings of and transaction in securities of the Company,
unless earlier revoked by the undersigned in a signed writing delivered to
the foregoing attorneys in fact.  This Power of Attorney may be filed with
the SEC as a confirming statement of the authority granted herein.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 12th day of February 2020.


Stephen R. Tritch
Print Name of Reporting Person or Entity

/s/ Stephen R. Tritch