Exhibit 24.11

                                POWER OF ATTORNEY


KNOW ALL MEN BY THESE PRESENTS:

         WHEREAS,    Chevron   Corporation,    a   Delaware   corporation   (the
"Corporation"),  contemplates filing with the Securities and Exchange Commission
at Washington,  D.C.,  under the  provisions of the  Securities  Exchange Act of
1934, as amended, and the regulations promulgated  thereunder,  an Annual Report
on Form 10-K.

         WHEREAS,  the  undersigned  is an officer or director,  or both, of the
Corporation.

         N O W,  T H E R E F O R  E,  the  undersigned  hereby  constitutes  and
appoints  LYDIA I.  BEEBE,  HILMAN P.  WALKER,  TERRY  MICHAEL  KEE and KEITH J.
MENDELSON,  or any of them, his or her  attorneys-in-fact  and agents, with full
power of  substitution  and  resubstitution,  for such  person and in his or her
name,  place and stead,  in any and all capacities,  to sign the  aforementioned
Annual Report on Form 10-K (and any and all amendments  thereto) and to file the
same, with all exhibits  thereto,  and other documents in connection  therewith,
with   the   Securities   and   Exchange   Commission,    granting   unto   said
attorneys-in-fact and agents full power and authority to do and perform each and
every  act and  thing  requisite  and  necessary  to be done  in and  about  the
premises, as fully as to all intents and purposes he or she might or could do in
person,  hereby  ratifying and  confirming all that said  attorneys-in-fact  and
agents,  or their  substitutes,  may  lawfully do and cause to be done by virtue
hereof.

         IN WITNESS  WHEREOF,  the  undersigned has hereunto set his or her hand
this 29th day of March, 2000.




                                              /s/ Chang-Lin Tien
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