Exhibit 24

                                POWER OF ATTORNEY


     KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned Directors of Alcoa
Inc. (the "Company") hereby constitute and appoint RICHARD B. KELSON,  ROBERT G.
WENNEMER, TIMOTHY S. MOCK and DENIS A DEMBLOWSKI, or any of them, their 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  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 Alcoa  Savings  Plan for
Non-Bargaining  Employees and Alcoa Savings Plan for Bargaining Employees or any
successor  plans (the "Plans"),  and interests of  participation  in such Plans,
including  specifically,  but without  limiting the generality of the foregoing,
power  and  authority  to sign  the  name of the  undersigned  Directors  to any
registration  statements to be filed with the Securities and Exchange Commission
in respect  of said Plans or  successor  plans and shares of common  stock,  and
interests  of  participation  in  such  Plans,  or any of  them,  to any and all
pre-effective amendments,  post-effective amendments and supplements to any such
registration statements, and to any instruments or documents filed as part of or
in connection with any such registration statements or pre-effective  amendments
or post-effective  amendments or supplements thereto; and the undersigned hereby
ratify and confirm 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.

November 12, 1999                  /s/Kenneth W. Dam
                                   Kenneth W. Dam

November 12, 1999                  /s/Joseph T. Gorman
                                   Joseph T. Gorman

November 12, 1999                  /s/Judith M. Gueron
                                   Judith M. Gueron

November 12, 1999                  /s/Sir Ronald Hampel
                                   Sir Ronald Hampel

November 12 1999                   /s/Hugh M. Morgan
                                   Hugh M. Morgan

November 12, 1999                  /s/John P. Mulroney
                                   John P. Mulroney

November 12, 1999                  /s/Paul H. O'Neill
                                   Paul H. O'Neill

November 12, 1999                  /s/Henry B. Schacht
                                   Henry B. Schacht

November 12, 1999                  /s/Franklin A. Thomas
                                   Franklin A. Thomas

November 12, 1999                  /s/Marina v.N. Whitman
                                   Marina v.N. Whitman