POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby
constitutes and appoints Robert K. Reeves, Amanda M. McMillian,
Anne V. Bruner, Rachelle Maniago-Earls and Courtney H. Landry,
signing singly, the undersigned's true and lawful
attorney-in-fact to:

1. execute for and on behalf of the undersigned, in the
undersigned's capacity as an officer of Anadarko Petroleum
Corporation (the "Company"), Forms ID, 3, 4 and 5, pursuant
to Section 16(a) of the Securities Exchange Act of 1934 and
the rules thereunder, and Form 144, pursuant to Rule 144 under
the Securities Act of 1933 and the rules thereunder, if
required; and

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, Form 4, Form 5 or Form 144 and
timely file such form 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 such attorney-in-fact's discretion.

The undersigned hereby grants 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 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 attorney-in-fact,
in serving in such capacity at the request of the undersigned,
is not assuming, nor is the Company assuming, any of the undersigned's
responsibilities to comply with Section 16(a) of the Securities
Exchange Act of 1934 or Rule 144 of the Securities Act of 1933.

This Power of Attorney shall remain in full force and effect until
the undersigned is no longer an officer of the Company unless earlier
revoked by the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact; provided, however, this Power of Attorney
will expire immediately upon the termination of employment of any
attorney-in-fact as to that attorney-in-fact only, but not as to any
other appointed attorney-in-fact hereunder.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney
to be executed as of this 14th day of February, 2017.

/s/ Ernest A. Leyendecker
Ernest A. Leyendecker