ALCOA UPSTREAM CORPORATION



POWER OF ATTORNEY





     KNOW ALL PERSONS BY THESE PRESENTS, that I, the undersigned director and/or

officer (or nominee) of Alcoa Upstream Corporation, a Delaware corporation (the "Company"),

hereby constitute and appoint Jeffrey D. Heeter, Marissa P. Earnest, and Jackie D. Myers, and

any  Assistant Secretary of the Company, and each of them, as my true and lawful attorneys-in-

fact and agents, with full power to act, together or each without the other, for me and in my

name, place and stead, in any and all capacities, to execute and file for and on behalf of the

undersigned (i) any reports on Forms 3, 4 and 5 (including any amendments thereto and any

successors to such Forms) with respect to ownership of securities of the Company, that the

undersigned may be required to file with the U.S. Securities and Exchange Commission in

accordance with Section 16(a) of the Securities Exchange Act of 1934 and the rules thereunder

and (ii) any other documents necessary or appropriate to obtain codes and passwords enabling

the undersigned to file such reports electronically.



      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 undersigned's responsibilities to comply with Section 16 of the Securities Exchange Act of

1934.  The Company will use all reasonable efforts to apprise the undersigned of applicable

filing requirements for Section 16 purposes.



     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 undersigned's holdings 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.  This Power of Attorney revokes and replaces any

prior Power of Attorney executed by the undersigned with respect to the ownership of securities

of the Company.



      IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be

executed as of this 24th day of October, 2016.









Signature: /s/ Ernesto Zedillo





Print Name: Ernesto Zedillo