Exhibit 24


                               POWER OF ATTORNEY


     KNOW ALL PERSONS BY THESE PRESENTS, that each of the undersigned Directors
of Alcoa Inc. (the "Company") hereby constitutes and appoints RICHARD B. KELSON,
TIMOTHY S. MOCK and DENIS A. DEMBLOWSKI, or any of them, his or her true and
lawful attorneys and agents to do any and all acts and things and execute any
and all instruments which said attorneys and agents, or any of them, may deem
necessary or advisable or may be required to enable the Company to comply with
the Securities Exchange Act of 1933, as amended, and any rules, regulations or
requirements of the Securities and Exchange Commission in respect thereof, in
connection with the registration under said Act of shares of common stock of the
Company to be issued and distributed pursuant to the stock options issued under
Reynolds Metals Company benefit plans or any successor plans, including
specifically, but without limiting the generality of the foregoing, power and
authority to sign the name of each of the undersigned Directors of the Company
to any registration statement to be filed with the Securities Exchange
Commission in respect of said plans or successor plans and shares of common
stock, or either of them, to any and all pre-effective amendments, post-
effective amendments and supplements to any such registration statement, and to
any instruments or documents filed as part of or in connection with any such
registration statement or pre-effective amendments or post-effective amendments
or supplements thereto; and the undersigned hereby ratifies and confirms all
that said attorneys and agents, or any of them, shall do or cause to be done by
virtue hereof.

     IN WITNESS WHEREOF, the undersigned have subscribed these presents on the
date set opposite their names below.



/s/ Kenneth W. Dam     April 28, 2000  /s/ John P. Mulroney     April 27, 2000
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Kenneth W. Dam                         John P. Mulroney

/s/ Joseph T. Gorman   April 27, 2000  /s/ Paul H. O'Neill      April 27, 2000
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Joseph T. Gorman                       Paul H. O'Neill

/s/ Judith M. Gueron   April 28, 2000  /s/ Henry B. Schacht     April 28, 2000
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Judith M. Gueron                       Henry B. Schacht

/s/ Sir Ronald Hampel  April 27, 2000  /s/ Franklin A. Thomas   April 28, 2000
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Sir Ronald Hampel                      Franklin A. Thomas

                               , 2000  /s/ Marina v.N. Whitman     May 1, 2000
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Hugh M. Morgan                         Marina v.N. Whitman




                               POWER OF ATTORNEY



     KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned President and
Chief Executive Officer and Director of Alcoa Inc. (the "Company") hereby
constitutes and appoints RICHARD B. KELSON, TIMOTHY S. MOCK and DENIS A.
DEMBLOWSKI, or any of them, his true and lawful attorneys and agents to do any
and all acts and things and execute any and all instruments which said attorneys
and agents, or any of them, may deem necessary or advisable or may be required
to enable the Company to comply with the Securities Exchange Act of 1933, as
amended, and any rules, regulations or requirements of the Securities and
Exchange Commission in respect thereof, in connection with the registration
under said Act of shares of common stock of the Company to be issued and
distributed pursuant to stock options issued under Reynolds Metals Company
benefit plans or any successor plans, including specifically, but without
limiting the generality of the foregoing, power and authority to sign the name
of the undersigned President and Chief Executive Officer and Director of the
Company to any registration statement to be filed with the Securities Exchange
Commission in respect of said Plan or successor plan and shares of common stock,
or either of them, to any and all pre-effective amendments, post-effective
amendments and supplements to any such registration statement, and to any
instruments or documents filed as part of or in connection with any such
registration statement or pre-effective amendments or post-effective amendments
or supplements thereto; and the undersigned hereby ratifies and confirms all
that said attorneys and agents, or any of them, shall do or cause to be done by
virtue hereof.

     IN WITNESS WHEREOF, the undersigned has subscribed these presents on the
date set opposite his name below.



/s/ Alain J. P. Belda                     May 3, 2000
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Alain J. P. Belda
President, Chief Executive Officer
and Director