Document:

Exhibit 4.1

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                         ARIZONA PUBLIC SERVICE COMPANY

                                       TO

                               JPMORGAN CHASE BANK

                                     TRUSTEE

                          Sixth Supplemental Indenture

                            Dated as of March 1, 2002

                                       To

                                    Indenture

                          Dated as of January 15, 1998

                              --------------------

                              6.50% Notes due 2012

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     SIXTH  SUPPLEMENTAL  INDENTURE,  dated as of March 1, 2002, between Arizona
Public Service Company, a corporation duly organized and existing under the laws
of the State of Arizona  (herein  called the  "Company"),  having its  principal
office at 400 North Fifth Street,  Phoenix,  Arizona  85004,  and JPMorgan Chase
Bank  (formerly  known  as  The  Chase  Manhattan  Bank),  a  New  York  banking
corporation,  as Trustee (herein called the "Trustee") under the Indenture dated
as of January 15, 1998 between the Company and the Trustee (the "Indenture").

                             RECITALS OF THE COMPANY

     The Company has  executed  and  delivered  the  Indenture to the Trustee to
provide for the issuance from time to time of its unsecured debentures, notes or
other evidences of indebtedness (the "Securities"), said Securities to be issued
in one or more series as provided in the Indenture.

     Pursuant to the terms of the Indenture,  the Company desires to provide for
the  establishment  of a new series of its  Securities  to be known as its 6.50%
Notes due 2012 (herein  called the "Notes Due 2012"),  the form and substance of
such Notes Due 2012 and the terms, provisions,  and conditions thereof to be set
forth as provided in the Indenture and this Sixth Supplemental Indenture.

     All things  necessary  to make this Sixth  Supplemental  Indenture  a valid
agreement of the Company,  and to make the Notes Due 2012,  when executed by the
Company and authenticated and delivered by the Trustee, the valid obligations of
the Company, have been done.

          NOW, THEREFORE, THIS FIFTH SUPPLEMENTAL INDENTURE WITNESSETH:

     For and in  consideration of the premises and the purchase of the Notes Due
2012 by the Holders  thereof,  and for the purpose of setting forth, as provided
in the  Indenture,  the form and  substance of the Notes Due 2012 and the terms,
provisions,  and conditions  thereof,  it is mutually agreed,  for the equal and
proportionate benefit of all Holders of the Notes Due 2012, as follows:

                                   ARTICLE ONE

                         GENERAL TERMS AND CONDITIONS OF
                               THE NOTES DUE 2012

     SECTION 101. There shall be and is hereby authorized a series of Securities
designated the "6.50% Notes due 2012" initially  limited in aggregate  principal
amount to $375,000,000,  which amount shall be as set forth in any Company Order
for the  authentication and delivery of Notes Due 2012. The Notes Due 2012 shall
mature and the principal shall be due and payable  together with all accrued and
unpaid  interest  thereon on March 1,  2012,  and shall be issued in the form of
registered Notes Due 2012 without coupons.

     The foregoing  principal amount of the Notes Due 2012 may be increased from
time to time as  permitted by Section 301 of the  Indenture.  All Notes Due 2012
need not be issued at the same time and such series may be reopened at any time,
without notice to, or the consent of, the then existing  Holders,  for issuances

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of additional  Notes Due 2012. Any such additional  Notes Due 2012 will be equal
in rank and have the same maturity,  payment  terms,  redemption  features,  and
other terms, except for the payment of interest accruing prior to the issue date
of the further  Notes Due 2012 and for the first  payment of interest  following
the issue date of the further Notes Due 2012, as those initially issued.

     SECTION  102.  The Notes Due 2012  shall be  issued in  certificated  form,
except that the Notes Due 2012 shall be issued initially as a Global Security to
and  registered  in the name of Cede & Co., as nominee of The  Depository  Trust
Company, as Depositary therefor.  Any Notes Due 2012 to be issued or transferred
to, or to be held by, Cede & Co. (or any  successor  thereof)  for such  purpose
shall bear the depositary  legend in substantially the form set forth at the top
of the form of Note Due 2012 in Article Two hereof (in lieu of that set forth in
Section 204 of the  Indenture),  unless  otherwise  agreed by the Company,  such
agreement to be confirmed in writing to the Trustee. Such Global Security may be
exchanged in whole or in part for Notes Due 2012 registered, and any transfer of
such Global Security in whole or in part may be registered, in the name or names
of  Persons  other  than such  Depositary  or a nominee  thereof  only under the
circumstances  set forth in Clause (2) of the last  paragraph  of Section 305 of
the Indenture,  or such other  circumstances  in addition to or in lieu of those
set forth in Clause (2) of the last paragraph of Section 305 of the Indenture as
to which the Company shall agree,  such  agreement to be confirmed in writing to
the Trustee.  Principal  of, and premium,  if any, and interest on the Notes Due
2012 will be payable,  the  transfer of Notes Due 2012 will be  registrable  and
Notes Due 2012 will be exchangeable  for Notes Due 2012 bearing  identical terms
and  provisions,  at the  office or  agency of the  Company  in the  Borough  of
Manhattan,  The City and State of New York; PROVIDED,  HOWEVER,  that payment of
interest  may be made at the  option  of the  Company  by  check  mailed  to the
registered holder at such address as shall appear in the Security Register.

     SECTION  103.  Each Note Due 2012 will bear  interest  at the rate of 6.50%
from March 1, 2002 or from the most recent Interest Payment Date (as hereinafter
defined)  to which  interest  has  been  paid or duly  provided  for  until  the
principal thereof is paid or made available for payment,  payable on March 1 and
September 1 of each year (each,  an  "Interest  Payment  Date"),  commencing  on
September  1,  2002,  to the  person  in whose  name  such  Note Due 2012 or any
Predecessor  Security is registered,  at the close of business on February 15 or
August  15,  as the case may be,  whether  or not a  Business  Day,  immediately
preceding  the  Interest  Payment  Date.  Any  such  interest   installment  not
punctually  paid or duly provided for shall forthwith cease to be payable to the
registered holders on such regular record date, and may be paid to the person in
whose  name  the  Note  Due  2012  (or one or more  Predecessor  Securities)  is
registered at the close of business on a special  record date to be fixed by the
Trustee for the payment of such  defaulted  interest,  notice  whereof  shall be
given to the  registered  holders  of the  Notes  Due 2012 not less than 10 days
prior to such  special  record  date,  or may be paid at any  time in any  other
lawful manner not inconsistent with the requirements of any securities  exchange
on which  the  Notes  Due 2012 may be  listed,  and upon  such  notice as may be
required by such exchange, all as more fully provided in the Indenture.

     The amount of interest payable for any period will be computed on the basis
of a 360-day year of twelve  30-day  months.  Interest will accrue from March 1,
2002 to, but not  including,  the relevant  payment  date. In the event that any

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date on which  interest is payable on the Notes Due 2012 is not a Business  Day,
then  payment  of  interest  payable  on such  date  will  be  made on the  next
succeeding  day which is a  Business  Day (and  without  any  interest  or other
payment  in  respect  of any such  delay),  in each case with the same force and
effect as if made on such date.  A "Business  Day" shall mean any day,  except a
Saturday,  a Sunday or a legal  holiday in the City of New York on which banking
institutions are authorized or required by law, regulation or executive order to
close.

     SECTION 104. The Company,  at its option,  may redeem all, or, from time to
time any part of the Notes Due 2012, upon notice as provided in the Indenture at
a Redemption Price equal to the greater of (a) the principal amount of the Notes
Due 2012 (or portion  thereof) to be redeemed  plus interest (if any) accrued to
the Redemption  Date or (b) the Make-Whole  Amount with respect to the Notes Due
2012 to be redeemed.

     For  purposes  of this  Section  104,  the  following  terms shall have the
following meanings:

          "MAKE-WHOLE AMOUNT" means the sum, as determined by a Quotation Agent,
of the  present  values  of the  principal  amount  of the  Notes Due 2012 to be
redeemed, together with scheduled payments of interest (exclusive of interest to
the  Redemption  Date) from the  Redemption  Date to the Stated  Maturity of the
Notes Due 2012, in each case  discounted to the Redemption Date on a semi-annual
basis,  assuming a 360-day  year  consisting  of twelve  30-day  months,  at the
Adjusted  Treasury Rate, plus accrued  interest (if any) on the principal amount
of the Notes Due 2012 being redeemed to the Redemption Date.

          "ADJUSTED  TREASURY RATE" means,  with respect to any Redemption Date,
(i)  the  yield,  under  the  heading  which  represents  the  average  for  the
immediately preceding week, appearing in the most recently published statistical
release designated "H.15 (519)" or any successor  publication which is published
weekly  by the  Board of  Governors  of the  Federal  Reserve  System  and which
establishes  yields on actively  traded  U.S.  Treasury  securities  adjusted to
constant  maturity under the caption  "Treasury  Constant  Maturities,"  for the
maturity  corresponding  to the  Comparable  Treasury  Issue (if no  maturity is
within three months  before or after the  remaining  term of the Notes Due 2012,
yields  for the two  published  maturities  most  closely  corresponding  to the
Comparable  Treasury  Issue shall be determined  and the Adjusted  Treasury Rate
shall be interpolated or extrapolated from such yields on a straight line basis,
rounding  to the  nearest  month)  or  (ii) if such  release  (or any  successor
release) is not published during the week preceding the calculation date or does
not contain such yields,  the rate per year equal to the semi-annual  equivalent
yield to maturity of the Comparable Treasury Issue, calculated using a price for
the  Comparable  Treasury  Issue  (expressed  as a percentage  of its  principal
amount) equal to the Comparable Treasury Price for such Redemption Date, in each
case calculated on the third Business Day preceding the Redemption Date, plus in
each case 0.25%.

          "COMPARABLE  TREASURY ISSUE" means the U.S. Treasury security selected
by the Quotation  Agent as having a maturity  comparable  to the remaining  term
from the Redemption Date to the Stated Maturity of the Notes Due 2012 that would
be utilized, at the time of selection and in accordance with customary financial

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practice,  in pricing new issues of  corporate  debt  securities  of  comparable
maturity to the remaining term of the Notes Due 2012.

          "QUOTATION AGENT" means the Reference  Treasury Dealer selected by the
Trustee after consultation with the Company.

          "REFERENCE TREASURY DEALER" means a primary U.S. Government securities
dealer selected by the Company.

          "COMPARABLE  TREASURY  PRICE"  means,  with respect to any  Redemption
Date, if clause (ii) of the definition of Adjusted  Treasury Rate is applicable,
the  average of three,  or such lesser  number as is  obtained  by the  Trustee,
Reference Treasury Dealer Quotations for such Redemption Date.

          "REFERENCE  TREASURY DEALER  QUOTATIONS"  means,  with respect to each
Reference Treasury Dealer and any Redemption Date, the average, as determined by
the Trustee,  of the bid and asked  prices for the  Comparable  Treasury  Issue,
expressed  in each  case as a  percentage  of its  principal  amount,  quoted in
writing to the Trustee by such Reference  Treasury Dealer at 5:00 p.m., New York
City time, on the third Business Day preceding such Redemption Date.

     The  Trustee  shall be  under no duty to  inquire  into,  may  conclusively
presume  the  correctness  of, and shall be fully  protected  in acting upon the
Company's calculation of any Redemption Price, including any Make-Whole Amount.

     The Company shall give the Trustee written notice of the Redemption  Price,
promptly after the calculation thereof.

     Notwithstanding  Section 1104 of the  Indenture,  any notice of  redemption
given pursuant to said Section with respect to the foregoing redemption need not
set forth the Redemption Price but only the manner of calculation thereof.

     SECTION  105.  The Notes Due 2012 shall be  defeasible  pursuant to Section
1302 or 1303 of the Indenture.

                                   ARTICLE TWO

                             FORM OF NOTES DUE 2012

     SECTION  201.  The  Notes  Due  2012  and  the  Trustee's   certificate  of
authentication  to be endorsed  thereon are to be substantially in the following
forms:

Form of Face of Security:

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UNLESS THIS  CERTIFICATE  IS PRESENTED BY AN  AUTHORIZED  REPRESENTATIVE  OF THE
DEPOSITORY  TRUST COMPANY,  A NEW YORK  CORPORATION  ("DTC"),  TO ARIZONA PUBLIC
SERVICE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE, OR PAYMENT,
AND ANY  CERTIFICATE  ISSUED IS  REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH
OTHER  NAME AS IS  REQUESTED  BY AN  AUTHORIZED  REPRESENTATIVE  OF DTC (AND ANY
PAYMENT  IS MADE TO CEDE & CO. OR TO SUCH  OTHER  ENTITY AS IS  REQUESTED  BY AN
AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE, OR OTHER USE HEREOF FOR
VALUE OR  OTHERWISE BY OR TO ANY PERSON IS WRONGFUL  INASMUCH AS THE  REGISTERED
OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

                         ARIZONA PUBLIC SERVICE COMPANY

                               6.50% Note due 2012

No. _________                                                       $375,000,000
                                                           CUSIP No. 040555 CD 4

     Arizona Public Service  Company,  a corporation duly organized and existing
under the laws of Arizona (herein called the "Company",  which term includes any
successor  Person  under  the  Indenture  hereinafter  referred  to),  for value
received,  hereby  promises to pay to Cede & Co.,  or  registered  assigns,  the
principal sum of Three Hundred  Seventy-Five  Million  Dollars on March 1, 2012,
and to pay interest  thereon from March 1, 2002 or from the most recent Interest
Payment Date to which interest has been paid or duly provided for, semi-annually
in arrears on March 1 and  September  1 in each year,  commencing  September  1,
2002, at the rate of 6.50%, until the principal hereof is paid or made available
for payment.

     The interest so payable,  and punctually  paid or duly provided for, on any
Interest Payment Date will, as provided in such Indenture, be paid to the Person
in  whose  name  this  Security  (or  one or  more  Predecessor  Securities)  is
registered  at the  close  of  business  on the  Regular  Record  Date  for such
interest,  which  shall  be  February  15 or  August  15,  as the  case  may be,
immediately preceding the Interest Payment Date (whether or not a Business Day).
Any such  interest not so punctually  paid or duly  provided for will  forthwith
cease to be payable to the Holder on such Regular  Record Date and may either be
paid to the  Person in whose  name  this  Security  (or one or more  Predecessor
Securities)  is registered at the close of business on a Special Record Date for
the  payment  of such  Defaulted  Interest  to be fixed by the  Trustee,  notice
whereof  shall be given to Holders of Securities of this series not less than 10
days  prior to such  Special  Record  Date,  or be paid at any time in any other
lawful manner not inconsistent with the requirements of any securities  exchange
on which the  Securities  of this series may be listed,  and upon such notice as
may be required by such exchange, all as more fully provided in said Indenture.

     Payment of the principal of (and premium,  if any) and any interest on this
Security will be made at the office or agency of the Company maintained for that
purpose in the City of New York,  in such coin or currency of the United  States
of America as at the time of payment is legal  tender for  payment of public and

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private debts;  provided,  however, that at the option of the Company payment of
interest  may be made by check  mailed to the  address  of the  Person  entitled
thereto as such address shall appear in the Security Register.

     Reference  is hereby made to the further  provisions  of this  Security set
forth on the reverse  hereof,  which further  provisions  shall for all purposes
have the same effect as if set forth at this place.

     Unless the  certificate of  authentication  hereon has been executed by the
Trustee  referred to on the reverse  hereof by manual  signature,  this Security
shall  not be  entitled  to any  benefit  under  the  Indenture  or be  valid or
obligatory for any purpose.

     IN WITNESS  WHEREOF,  the  Company has caused  this  instrument  to be duly
executed under its corporate seal.

                                       ARIZONA PUBLIC SERVICE COMPANY

                                       By
                                          --------------------------------------

Attest:

----------------------------------

Form of Reverse of Security.

     This  Security  is one of a duly  authorized  issue  of  securities  of the
Company (herein called the "Securities"), issued and to be issued in one or more
series  under an  Indenture,  dated as of January  15, 1998  (herein  called the
"Indenture",  which  term  shall  have  the  meaning  assigned  to  it  in  such
instrument),  between the Company and JPMorgan Chase Bank (formerly known as The
Chase  Manhattan  Bank),  as Trustee  (herein called the  "Trustee",  which term
includes any  successor  trustee under the  Indenture),  and reference is hereby
made to the Indenture for a statement of the respective  rights,  limitations of
rights,  duties and  immunities  thereunder of the Company,  the Trustee and the
Holders of the Securities  and of the terms upon which the  Securities  are, and
are to be,  authenticated  and  delivered.  This  Security  is one of the series
designated on the face hereof, which is unlimited in aggregate principal amount.

     The Securities of this series are subject to redemption  upon not less than
30 days' notice by mail at the option of the Company,  in whole or in part, from
time to time at a  Redemption  Price equal to the  greater of (a) the  principal
amount of the Securities (or portion thereof) of this series to be redeemed plus
interest (if any) accrued to the Redemption  Date or (b) the  Make-Whole  Amount

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(as defined  below) with respect to the Securities of this series to be redeemed
(the "Redemption Price").

     If notice has been given as  provided  in the  Indenture  and funds for the
redemption of any  Securities  (or any portion  thereof)  called for  redemption
shall  have been made  available  on the  Redemption  Date  referred  to in such
notice,  such Securities (or any portion thereof) will cease to bear interest on
the date fixed for such  redemption  specified in such notice and the only right
of the Holders of such  Securities  will be to receive payment of the Redemption
Price.

     Notice of any  optional  redemption  of  Securities  of this series (or any
portion  thereof) will be given to Holders at their  addresses,  as shown in the
Security  Register for such  Securities,  not more than 60 nor less than 30 days
prior to the date fixed for  redemption.  The notice of redemption will specify,
among other items,  the  Redemption  Price or, if not then known,  the manner of
calculation  thereof,  and the principal amount of the Securities of this series
held by such Holder to be redeemed.  If less than all of the  Securities of this
series  are to be  redeemed  at the option of the  Company,  the  Trustee  shall
select,  in such  manner as it shall deem fair and  appropriate,  the portion of
such Securities to be redeemed in whole or in part.

     As used herein:

          "MAKE-WHOLE AMOUNT" means the sum, as determined by a Quotation Agent,
of the present  values of the principal  amount of the Securities of this series
to be redeemed,  together  with  scheduled  payments of interest  (exclusive  of
interest to the Redemption Date) from the Redemption Date to the Stated Maturity
of the Securities of this series, in each case discounted to the Redemption Date
on a  semi-annual  basis,  assuming a 360-day year  consisting  of twelve 30-day
months,  at the Adjusted  Treasury Rate,  plus accrued  interest (if any) on the
principal  amount  of the  Securities  of  this  series  being  redeemed  to the
Redemption Date.

          "ADJUSTED  TREASURY RATE" means,  with respect to any Redemption Date,
(i)  the  yield,  under  the  heading  which  represents  the  average  for  the
immediately preceding week, appearing in the most recently published statistical
release designated "H.15 (519)" or any successor  publication which is published
weekly  by the  Board of  Governors  of the  Federal  Reserve  System  and which
establishes  yields on actively  traded  U.S.  Treasury  securities  adjusted to
constant  maturity under the caption  "Treasury  Constant  Maturities,"  for the
maturity  corresponding  to the  Comparable  Treasury  Issue (if no  maturity is
within three months before or after the remaining term of the Securities of this
series,  yields for the two published  maturities most closely  corresponding to
the Comparable Treasury Issue shall be determined and the Adjusted Treasury Rate
shall be interpolated or extrapolated from such yields on a straight line basis,
rounding  to the  nearest  month)  or  (ii) if such  release  (or any  successor
release) is not published during the week preceding the calculation date or does
not contain such yields,  the rate per year equal to the semi-annual  equivalent
yield to maturity of the Comparable Treasury Issue, calculated using a price for
the  Comparable  Treasury  Issue  (expressed  as a percentage  of its  principal
amount) equal to the Comparable Treasury Price for such Redemption Date, in each
case calculated on the third Business Day preceding the Redemption Date, plus in
each case 0.25%.

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          "COMPARABLE  TREASURY ISSUE" means the U.S. Treasury security selected
by the Quotation  Agent as having a maturity  comparable  to the remaining  term
from the Redemption Date to the Stated Maturity of the Securities of this series
that  would  be  utilized,  at the  time of  selection  and in  accordance  with
customary financial practice, in pricing new issues of corporate debt securities
of comparable maturity to the remaining term of the Securities of this series.

          "QUOTATION AGENT" means the Reference  Treasury Dealer selected by the
Trustee after consultation with the Company.

          "REFERENCE TREASURY DEALER" means a primary U.S. Government securities
dealer selected by the Company.

          "COMPARABLE  TREASURY  PRICE"  means,  with respect to any  Redemption
Date, if clause (ii) of the definition of Adjusted  Treasury Rate is applicable,
the  average of three,  or such lesser  number as is  obtained  by the  Trustee,
Reference Treasury Dealer Quotations for such Redemption Date.

          "REFERENCE  TREASURY DEALER  QUOTATIONS"  means,  with respect to each
Reference Treasury Dealer and any Redemption Date, the average, as determined by
the Trustee,  of the bid and asked  prices for the  Comparable  Treasury  Issue,
expressed  in each  case as a  percentage  of its  principal  amount,  quoted in
writing to the Trustee by such Reference  Treasury Dealer at 5:00 p.m., New York
City time, on the third Business Day preceding such Redemption Date.

     The Securities of this series will not be subject to any sinking fund.

     In the event of redemption of this Security in part only, a new Security or
Securities of this series and of like tenor for the  unredeemed  portion  hereof
will be issued in the name of the Holder hereof upon the cancellation hereof.

     The Indenture contains  provisions for defeasance at any time of the entire
indebtedness  of the  Security or certain  restrictive  covenants  and Events of
Default with respect to this Security, in each case upon compliance with certain
conditions set forth in the Indenture.

     If an Event of Default  with  respect to  Securities  of this series  shall
occur and be  continuing,  the principal of the Securities of this series may be
declared  due and  payable in the manner  and with the  effect  provided  in the
Indenture.

     The Indenture  permits,  with certain  exceptions as therein provided,  the
amendment  thereof and the  modification  of the rights and  obligations  of the
Company  and the rights of the  Holders of the  Securities  of each series to be
affected under the Indenture at any time by the Company and the Trustee  without
the consent of such Holders in certain limited circumstances or with the consent
of the  Holders of 66-2/3% in  principal  amount of the  Securities  at the time
Outstanding  of  each  series  to  be  affected.  The  Indenture  also  contains
provisions  permitting the Holders of specified  percentages in principal amount

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of the  Securities  of each  series  at the time  Outstanding,  on behalf of the
Holders of all  Securities  of such series,  to waive  compliance by the Company
with certain  provisions of the  Indenture  and certain past defaults  under the
Indenture  and their  consequences.  Any such consent or waiver by the Holder of
this  Security  shall be  conclusive  and binding  upon such Holder and upon all
future Holders of this Security and of any Security issued upon the registration
of transfer  hereof or in  exchange  herefor or in lieu  hereof,  whether or not
notation of such consent or waiver is made upon this Security.

     As provided in and subject to the provisions of the  Indenture,  the Holder
of this  Security  shall not have the right to  institute  any  proceeding  with
respect to the Indenture or for the  appointment of a receiver or trustee or for
any other remedy thereunder,  unless such Holder shall have previously given the
Trustee  written  notice of a  continuing  Event of Default  with respect to the
Securities of this series,  the Holders of not less than 25% in principal amount
of the Securities of this series at the time Outstanding shall have made written
request to the  Trustee  to  institute  proceedings  in respect of such Event of
Default as Trustee and offered the Trustee reasonable indemnity, and the Trustee
shall not have  received  from the Holders of a majority in principal  amount of
Securities of this series at the time Outstanding a direction  inconsistent with
such  request,  and shall have failed to institute any such  proceeding,  for 60
days after receipt of such notice, request and offer of indemnity. The foregoing
shall not apply to any suit  instituted  by the Holder of this  Security for the
enforcement of any payment of principal hereof or any premium or interest hereon
on or after the respective due dates expressed herein.

     No reference  herein to the  Indenture and no provision of this Security or
of the Indenture  shall alter or impair the obligation of the Company,  which is
absolute and unconditional, to pay the principal of and any premium and interest
on this  Security  at the times,  place and rate,  and in the coin or  currency,
herein prescribed.

     As provided in the Indenture and subject to certain limitations therein set
forth,  the transfer of this Security is registrable  in the Security  Register,
upon  surrender of this Security for  registration  of transfer at the office or
agency of the  Company in any place where the  principal  of and any premium and
interest on this  Security are payable,  duly endorsed by, or  accompanied  by a
written  instrument  of  transfer  in form  satisfactory  to the Company and the
Security  Registrar  duly  executed by, the Holder  hereof or his attorney  duly
authorized in writing,  and thereupon one or more new  Securities of this series
and of like  tenor,  of  authorized  denominations  and for the  same  aggregate
principal amount, will be issued to the designated transferee or transferees.

     The Securities of this series are issuable only in registered  form without
coupons  in  denominations  of $1,000  and any  integral  multiple  thereof.  As
provided in the Indenture and subject to certain  limitations therein set forth,
Securities of this series are exchangeable for a like aggregate principal amount
of  Securities  of this  series  and of like  tenor  of a  different  authorized
denomination, as requested by the Holder surrendering the same.

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     No service  charge shall be made for any such  registration  of transfer or
exchange,  but the Company may require  payment of a sum sufficient to cover any
tax or other governmental charge payable in connection therewith.

     Prior to due presentment of this Security for registration of transfer, the
Company,  the  Trustee and any agent of the Company or the Trustee may treat the
Person in whose name this  Security is  registered  as the owner  hereof for all
purposes,  whether or not this Security be overdue, and neither the Company, the
Trustee nor any such agent shall be affected by notice to the contrary.

     All terms used in this Security  which are defined in the  Indenture  shall
have the meanings assigned to them in the Indenture.

Form of Trustee's Certificate of Authentication.

                          CERTIFICATE OF AUTHENTICATION

     This is one of the Securities of the series designated  therein referred to
in the within-mentioned Indenture.

Dated:                                                       JPMORGAN CHASE BANK
       -------------------------                                      AS TRUSTEE

                                        By
                                           -------------------------------------
                                                              AUTHORIZED OFFICER

                                  ARTICLE THREE

                        ORIGINAL ISSUE OF NOTES DUE 2012

     SECTION 301.  Subject to Section  101, the Notes Due 2012 in the  aggregate
principal amount of $375,000,000 may, upon execution of this Sixth  Supplemental
Indenture,  or from time to time  thereafter,  be  executed  by the  Company and
delivered to the Trustee for  authentication,  and the Trustee  shall  thereupon
authenticate  and deliver said Notes Due 2012 in accordance with a Company Order
delivered  to the Trustee by the  Company,  without  any  further  action by the
Company.

                                  ARTICLE FOUR

                           PAYING AGENT AND REGISTRAR

     SECTION  401.  JPMorgan  Chase Bank will be the Paying  Agent and  Security
Registrar for the Notes Due 2012.

                                       11
<PAGE>
                                  ARTICLE FIVE

                                SUNDRY PROVISIONS

     SECTION  501.  Except  as  otherwise   expressly  provided  in  this  Sixth
Supplemental  Indenture  or in the form of Notes Due 2012 or  otherwise  clearly
required by the context hereof or thereof, all terms used herein or in said form
of Notes Due 2012 that are  defined  in the  Indenture  shall  have the  several
meanings respectively assigned to them thereby.

     SECTION 502. The Indenture,  as heretofore supplemented and amended, and as
supplemented by this Sixth Supplemental  Indenture,  is in all respects ratified
and confirmed, and this Sixth Supplemental Indenture shall be deemed part of the
Indenture in the manner and to the extent herein and therein provided.

     SECTION  503.  The  Trustee  hereby  accepts  the trusts  herein  declared,
provided, created,  supplemented, or amended and agrees to perform the same upon
the terms and conditions herein and in the Indenture, as heretofore supplemented
and amended, set forth and upon the following terms and conditions:

     The Trustee shall not be  responsible  in any manner  whatsoever  for or in
respect of the validity or sufficiency of this Sixth  Supplemental  Indenture or
for or in respect of the recitals  contained  herein,  all of which recitals are
made by the  Company  solely.  In  general,  each and every  term and  condition
contained in Article Six of the Indenture shall apply to and form a part of this
Sixth Supplemental  Indenture with the same force and effect as if the same were
herein set forth in full with such omissions,  variations,  and  insertions,  if
any, as may be  appropriate  to make the same conform to the  provisions of this
Sixth Supplemental Indenture.

     This  instrument  may be  executed in any number of  counterparts,  each of
which so executed shall be deemed to be an original,  but all such  counterparts
shall together constitute but one and the same instrument.

                                       12
<PAGE>
     IN WITNESS WHEREOF,  the parties hereto have caused this Sixth Supplemental
Indenture  to be duly  executed,  and  their  respective  corporate  seals to be
hereunto affixed and attested, all as of the day and year first above written.

                                        ARIZONA PUBLIC SERVICE COMPANY

                                        By: Barbara M. Gomez
                                            ------------------------------------
                                            Barbara M. Gomez
                                            Treasurer

Attest:

Betsy A. Pregulman
-----------------------------------
Betsy A. Pregulman
Associate Secretary

                                        JPMORGAN CHASE BANK, as Trustee

                                        By: Carol Ng
                                            ------------------------------------
                                            Carol Ng
                                            Vice President
Attest:

Virginia Dominguez
-----------------------------------
Name: Virginia Dominguez
Title: Trust Officer

                                       13
<PAGE>
STATE OF ARIZONA     )
                     ) ss.:
COUNTY OF MARICOPA   )

     On the 28th day of February,  2002,  before me  personally  came Barbara M.
Gomez, to me known,  who, being by me duly sworn, did depose and say that she is
the  Treasurer  of  Arizona  Public  Service  Company,  one of the  corporations
described in and which  executed the  foregoing  instrument;  that she knows the
seal of said  corporation;  that the seal  affixed  to said  instrument  is such
corporate seal; that it was so affixed by authority of the Board of Directors of
said corporation; and that she signed her name thereto by like authority.

                                           Joy L. Heinrich
                                           -------------------------------------
                                           Notary Public

My Commission Expires:

10-1-05
------------------------------------

STATE OF NEW YORK     )
                      ) ss.:
COUNTY OF NEW YORK    )

     On the 28th day of February,  2002,  before me personally came Carol Ng, to
me known,  who,  being by me duly sworn,  did depose and say that he/SHE is Vice
President of JPMorgan Chase Bank (formerly known as The Chase  Manhattan  Bank),
one  of  the  corporations   described  in  and  which  executed  the  foregoing
instrument;  that  he/she  knows  the  seal of said  corporation;  that the seal
affixed to said  instrument is such  corporate  seal;  that it was so affixed by
authority of the Board of Directors of said corporation;  and that he/she signed
his/her name thereto by like authority.

                                           Annabelle DeLuca
                                           -------------------------------------
                                           Notary Public

My Commission Expires:

July 15, 2003
------------------------------------

                                       14Exhibit 4.2

UNLESS THIS  CERTIFICATE  IS PRESENTED BY AN  AUTHORIZED  REPRESENTATIVE  OF THE
DEPOSITORY  TRUST COMPANY,  A NEW YORK  CORPORATION  ("DTC"),  TO ARIZONA PUBLIC
SERVICE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE, OR PAYMENT,
AND ANY  CERTIFICATE  ISSUED IS  REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH
OTHER  NAME AS IS  REQUESTED  BY AN  AUTHORIZED  REPRESENTATIVE  OF DTC (AND ANY
PAYMENT  IS MADE TO CEDE & CO. OR TO SUCH  OTHER  ENTITY AS IS  REQUESTED  BY AN
AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE, OR OTHER USE HEREOF FOR
VALUE OR  OTHERWISE BY OR TO ANY PERSON IS WRONGFUL  INASMUCH AS THE  REGISTERED
OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

                         ARIZONA PUBLIC SERVICE COMPANY

                               6.50% Note due 2012

No. 1                                                               $375,000,000
                                                           CUSIP No. 040555 CD 4

     Arizona Public Service  Company,  a corporation duly organized and existing
under the laws of Arizona (herein called the "Company",  which term includes any
successor  Person  under  the  Indenture  hereinafter  referred  to),  for value
received,  hereby  promises to pay to Cede & Co.,  or  registered  assigns,  the
principal  sum of Three  Hundred and  Seventy-five  Million  Dollars on March 1,
2012,  and to pay  interest  thereon  from March 1, 2002 or from the most recent
Interest  Payment  Date to which  interest has been paid or duly  provided  for,
semi-annually  in arrears on March 1 and  September  1 in each year,  commencing
September 1, 2002, at the rate of 6.50%,  until the principal  hereof is paid or
made available for payment.

     The interest so payable,  and punctually  paid or duly provided for, on any
Interest Payment Date will, as provided in such Indenture, be paid to the Person
in  whose  name  this  Security  (or  one or  more  Predecessor  Securities)  is
registered  at the  close  of  business  on the  Regular  Record  Date  for such
interest,  which  shall  be  February  15 or  August  15,  as the  case  may be,
immediately preceding the Interest Payment Date (whether or not a Business Day).
Any such  interest not so punctually  paid or duly  provided for will  forthwith
cease to be payable to the Holder on such Regular  Record Date and may either be
paid to the  Person in whose  name  this  Security  (or one or more  Predecessor
Securities)  is registered at the close of business on a Special Record Date for
the  payment  of such  Defaulted  Interest  to be fixed by the  Trustee,  notice
whereof  shall be given to Holders of Securities of this series not less than 10
days  prior to such  Special  Record  Date,  or be paid at any time in any other
lawful manner not inconsistent with the requirements of any securities  exchange
on which the  Securities  of this series may be listed,  and upon such notice as
may be required by such exchange, all as more fully provided in said Indenture.

     Payment of the principal of (and premium,  if any) and any interest on this
Security will be made at the office or agency of the Company maintained for that
purpose in the City of New York,  in such coin or currency of the United  States
of America as at the time of payment is legal  tender for  payment of public and
private debts;  provided,  however, that at the option of the Company payment of
interest  may be made by check  mailed to the  address  of the  Person  entitled
thereto as such address shall appear in the Security Register.

     Reference  is hereby made to the further  provisions  of this  Security set
forth on the reverse  hereof,  which further  provisions  shall for all purposes
have the same effect as if set forth at this place.

                                       1
<PAGE>
     Unless the  certificate of  authentication  hereon has been executed by the
Trustee  referred to on the reverse  hereof by manual  signature,  this Security
shall  not be  entitled  to any  benefit  under  the  Indenture  or be  valid or
obligatory for any purpose.

     IN WITNESS  WHEREOF,  the  Company has caused  this  instrument  to be duly
executed under its corporate seal.

                                      ARIZONA PUBLIC SERVICE COMPANY

                                      By Michael V. Palmeri
                                         ---------------------------------------
                                         Vice President, Finance

Attest:

Betsy A. Pregulman
--------------------------------
Associate Secretary

                                       2
<PAGE>
     This  Security  is one of a duly  authorized  issue  of  securities  of the
Company (herein called the "Securities"), issued and to be issued in one or more
series  under an  Indenture,  dated as of January  15, 1998  (herein  called the
"Indenture",  which  term  shall  have  the  meaning  assigned  to  it  in  such
instrument),  between the Company and JPMorgan Chase Bank (formerly known as The
Chase  Manhattan  Bank),  as Trustee  (herein called the  "Trustee",  which term
includes any  successor  trustee under the  Indenture),  and reference is hereby
made to the Indenture for a statement of the respective  rights,  limitations of
rights,  duties and  immunities  thereunder of the Company,  the Trustee and the
Holders of the Securities  and of the terms upon which the  Securities  are, and
are to be,  authenticated  and  delivered.  This  Security  is one of the series
designated on the face hereof, which is unlimited in aggregate principal amount.

     The Securities of this series are subject to redemption  upon not less than
30 days' notice by mail at the option of the Company,  in whole or in part, from
time to time at a  Redemption  Price equal to the  greater of (a) the  principal
amount of the Securities (or portion thereof) of this series to be redeemed plus
interest (if any) accrued to the Redemption  Date or (b) the  Make-Whole  Amount
(as defined  below) with respect to the Securities of this series to be redeemed
(the "Redemption Price").

     If notice has been given as  provided  in the  Indenture  and funds for the
redemption of any  Securities  (or any portion  thereof)  called for  redemption
shall  have been made  available  on the  Redemption  Date  referred  to in such
notice,  such Securities (or any portion thereof) will cease to bear interest on
the date fixed for such  redemption  specified in such notice and the only right
of the Holders of such  Securities  will be to receive payment of the Redemption
Price.

     Notice of any  optional  redemption  of  Securities  of this series (or any
portion  thereof) will be given to Holders at their  addresses,  as shown in the
Security  Register for such  Securities,  not more than 60 nor less than 30 days
prior to the date fixed for  redemption.  The notice of redemption will specify,
among other items,  the  Redemption  Price or, if not then known,  the manner of
calculation  thereof,  and the principal amount of the Securities of this series
held by such Holder to be redeemed.  If less than all of the  Securities of this
series  are to be  redeemed  at the option of the  Company,  the  Trustee  shall
select,  in such  manner as it shall deem fair and  appropriate,  the portion of
such Securities to be redeemed in whole or in part.

     As used herein:

          "MAKE-WHOLE AMOUNT" means the sum, as determined by a Quotation Agent,
of the present  values of the principal  amount of the Securities of this series
to be redeemed,  together  with  scheduled  payments of interest  (exclusive  of
interest to the Redemption Date) from the Redemption Date to the Stated Maturity
of the Securities of this series, in each case discounted to the Redemption Date
on a  semi-annual  basis,  assuming a 360-day year  consisting  of twelve 30-day
months,  at the Adjusted  Treasury Rate,  plus accrued  interest (if any) on the
principal  amount  of the  Securities  of  this  series  being  redeemed  to the
Redemption Date.

          "ADJUSTED  TREASURY RATE" means,  with respect to any Redemption Date,
(i)  the  yield,  under  the  heading  which  represents  the  average  for  the
immediately preceding week, appearing in the most recently published statistical
release designated "H.15 (519)" or any successor  publication which is published
weekly  by the  Board of  Governors  of the  Federal  Reserve  System  and which
establishes  yields on actively  traded  U.S.  Treasury  securities  adjusted to
constant  maturity under the caption  "Treasury  Constant  Maturities,"  for the
maturity  corresponding  to the  Comparable  Treasury  Issue (if no  maturity is
within three months before or after the remaining term of the Securities of this

                                       3
<PAGE>
series,  yields for the two published  maturities most closely  corresponding to
the Comparable Treasury Issue shall be determined and the Adjusted Treasury Rate
shall be interpolated or extrapolated from such yields on a straight line basis,
rounding  to the  nearest  month)  or  (ii) if such  release  (or any  successor
release) is not published during the week preceding the calculation date or does
not contain such yields,  the rate per year equal to the semi-annual  equivalent
yield to maturity of the Comparable Treasury Issue, calculated using a price for
the  Comparable  Treasury  Issue  (expressed  as a percentage  of its  principal
amount) equal to the Comparable Treasury Price for such Redemption Date, in each
case calculated on the third Business Day preceding the Redemption Date, plus in
each case 0.25%.

          "COMPARABLE  TREASURY ISSUE" means the U.S. Treasury security selected
by the Quotation  Agent as having a maturity  comparable  to the remaining  term
from the Redemption Date to the Stated Maturity of the Securities of this series
that  would  be  utilized,  at the  time of  selection  and in  accordance  with
customary financial practice, in pricing new issues of corporate debt securities
of comparable maturity to the remaining term of the Securities of this series.

          "QUOTATION AGENT" means the Reference  Treasury Dealer selected by the
Trustee after consultation with the Company.

          "REFERENCE TREASURY DEALER" means a primary U.S. Government securities
dealer selected by the Company.

          "COMPARABLE  TREASURY  PRICE"  means,  with respect to any  Redemption
Date, if clause (ii) of the definition of Adjusted  Treasury Rate is applicable,
the  average of three,  or such lesser  number as is  obtained  by the  Trustee,
Reference Treasury Dealer Quotations for such Redemption Date.

          "REFERENCE  TREASURY DEALER  QUOTATIONS"  means,  with respect to each
Reference Treasury Dealer and any Redemption Date, the average, as determined by
the Trustee,  of the bid and asked  prices for the  Comparable  Treasury  Issue,
expressed  in each  case as a  percentage  of its  principal  amount,  quoted in
writing to the Trustee by such Reference  Treasury Dealer at 5:00 p.m., New York
City time, on the third Business Day preceding such Redemption Date.

     The Securities of this series will not be subject to any sinking fund.

     In the event of redemption of this Security in part only, a new Security or
Securities of this series and of like tenor for the  unredeemed  portion  hereof
will be issued in the name of the Holder hereof upon the cancellation hereof.

     The Indenture contains  provisions for defeasance at any time of the entire
indebtedness  of the  Security or certain  restrictive  covenants  and Events of
Default with respect to this Security, in each case upon compliance with certain
conditions set forth in the Indenture.

     If an Event of Default  with  respect to  Securities  of this series  shall
occur and be  continuing,  the principal of the Securities of this series may be
declared  due and  payable in the manner  and with the  effect  provided  in the
Indenture.

     The Indenture  permits,  with certain  exceptions as therein provided,  the
amendment  thereof and the  modification  of the rights and  obligations  of the
Company  and the rights of the  Holders of the  Securities  of each series to be
affected under the Indenture at any time by the Company and the Trustee  without

                                       4
<PAGE>
the consent of such Holders in certain limited circumstances or with the consent
of the  Holders of 66-2/3% in  principal  amount of the  Securities  at the time
Outstanding  of  each  series  to  be  affected.  The  Indenture  also  contains
provisions  permitting the Holders of specified  percentages in principal amount
of the  Securities  of each  series  at the time  Outstanding,  on behalf of the
Holders of all  Securities  of such series,  to waive  compliance by the Company
with certain  provisions of the  Indenture  and certain past defaults  under the
Indenture  and their  consequences.  Any such consent or waiver by the Holder of
this  Security  shall be  conclusive  and binding  upon such Holder and upon all
future Holders of this Security and of any Security issued upon the registration
of transfer  hereof or in  exchange  herefor or in lieu  hereof,  whether or not
notation of such consent or waiver is made upon this Security.

     As provided in and subject to the provisions of the  Indenture,  the Holder
of this  Security  shall not have the right to  institute  any  proceeding  with
respect to the Indenture or for the  appointment of a receiver or trustee or for
any other remedy thereunder,  unless such Holder shall have previously given the
Trustee  written  notice of a  continuing  Event of Default  with respect to the
Securities of this series,  the Holders of not less than 25% in principal amount
of the Securities of this series at the time Outstanding shall have made written
request to the  Trustee  to  institute  proceedings  in respect of such Event of
Default as Trustee and offered the Trustee reasonable indemnity, and the Trustee
shall not have  received  from the Holders of a majority in principal  amount of
Securities of this series at the time Outstanding a direction  inconsistent with
such  request,  and shall have failed to institute any such  proceeding,  for 60
days after receipt of such notice, request and offer of indemnity. The foregoing
shall not apply to any suit  instituted  by the Holder of this  Security for the
enforcement of any payment of principal hereof or any premium or interest hereon
on or after the respective due dates expressed herein.

     No reference  herein to the  Indenture and no provision of this Security or
of the Indenture  shall alter or impair the obligation of the Company,  which is
absolute and unconditional, to pay the principal of and any premium and interest
on this  Security  at the times,  place and rate,  and in the coin or  currency,
herein prescribed.

     As provided in the Indenture and subject to certain limitations therein set
forth,  the transfer of this Security is registrable  in the Security  Register,
upon  surrender of this Security for  registration  of transfer at the office or
agency of the  Company in any place where the  principal  of and any premium and
interest on this  Security are payable,  duly endorsed by, or  accompanied  by a
written  instrument  of  transfer  in form  satisfactory  to the Company and the
Security  Registrar  duly  executed by, the Holder  hereof or his attorney  duly
authorized in writing,  and thereupon one or more new  Securities of this series
and of like  tenor,  of  authorized  denominations  and for the  same  aggregate
principal amount, will be issued to the designated transferee or transferees.

     The Securities of this series are issuable only in registered  form without
coupons  in  denominations  of $1,000  and any  integral  multiple  thereof.  As
provided in the Indenture and subject to certain  limitations therein set forth,
Securities of this series are exchangeable for a like aggregate principal amount
of  Securities  of this  series  and of like  tenor  of a  different  authorized
denomination, as requested by the Holder surrendering the same.

     No service  charge shall be made for any such  registration  of transfer or
exchange,  but the Company may require  payment of a sum sufficient to cover any
tax or other governmental charge payable in connection therewith.

                                       5
<PAGE>
     Prior to due presentment of this Security for registration of transfer, the
Company,  the  Trustee and any agent of the Company or the Trustee may treat the
Person in whose name this  Security is  registered  as the owner  hereof for all
purposes,  whether or not this Security be overdue, and neither the Company, the
Trustee nor any such agent shall be affected by notice to the contrary.

     All terms used in this Security  which are defined in the  Indenture  shall
have the meanings assigned to them in the Indenture.

                          CERTIFICATE OF AUTHENTICATION

         This is one of the Securities of the series designated therein referred
to in the within-mentioned Indenture.

Dated: March 1, 2001                                         JPMORGAN CHASE BANK
                                                                      AS TRUSTEE

                                        By Carol Ng
                                           -------------------------------------
                                                              AUTHORIZED OFFICER

                                       6

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