ARIZONA PUBLIC SERVICE CO
8-K, 1997-04-09
ELECTRIC & OTHER SERVICES COMBINED
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    FORM 8-K
                                 CURRENT REPORT


                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934


         Date of Report (Date of earliest event reported): April 7, 1997
                                                          ----------------

                         ARIZONA PUBLIC SERVICE COMPANY
                         ------------------------------
             (Exact name of registrant as specified in its charter)


            Arizona                     1-4473                  86-0011170
- --------------------------------------------------------------------------------
(State or other jurisdiction          (Commission              (IRS Employer
      of incorporation)               File Number)        Identification Number)


 400 North Fifth Street, P.O. Box 53999, Phoenix, Arizona               85004
 --------------------------------------------------------               -----
       (Address of principal executive offices)                       (Zip code)



                                 (602) 250-1000
              ----------------------------------------------------
             (Registrant's telephone number, including area code)
 


                                      NONE
          -------------------------------------------------------------
         (Former name or former address, if changed since last report)
<PAGE>
Item 7.           Financial  Statement,  Pro  Forma  Financial  Information  and
                  --------------------------------------------------------------
                  Exhibits
                  --------

                  (c)      Exhibits.

                  The  Registrant  hereby  files the  following  Exhibit  to its
Registration  Statements  on Form S-3 (Nos.  33-55473,  33-64455 and  333-15379)
which were declared effective on October 3, 1994, December 22, 1995 and November
14, 1996, respectively.

Exhibit
No.               Description
- -------           -----------

1.4               Terms  Agreement,  dated April 7, 1997, in connection with the
                  offering of $50,000,000 of 6.72% Senior Notes Due 1999.

4.8               Fifty-fifth  Supplemental Indenture dated as of April 1, 1997,
                  relating to the issuance of $50,000,000 of the Company's First
                  Mortgage Bonds, Senior Note Series B.

4.9               Specimen of Bond of First Mortgage  Bonds,  Senior Note Series
                  B.

4.10              Second  Supplemental  Indenture  dated  as of  April  1,  1997
                  relating to the issuance of  $50,000,000 of 6.72% Senior Notes
                  Due 1999.

4.11              Specimen of Note of 6.72% Senior Notes Due 1999.

12.2              Computation of Ratio of Earnings to Fixed Charges.
<PAGE>
                                   SIGNATURES
                                   ----------



         Pursuant to the  requirements  of the Securities  Exchange Act of 1934,
the  Company  has duly  caused  this  report to be  signed on its  behalf by the
undersigned hereunto duly authorized.



                                                 ARIZONA PUBLIC SERVICE COMPANY
                                                          (Registrant)




Dated:   April 9, 1997                           By:     Nancy E. Felker
                                                    ---------------------------
                                                         Nancy E. Felker
                                                         Treasurer



                         Arizona Public Service Company

                                   ("Company")

                           Medium-Term Notes, Series B

                   Due Nine Months or More from Date of Issue

                                 TERMS AGREEMENT
                                 ---------------


                                                                   April 7, 1997


Arizona Public Service Company
400 North 5th Street
Phoenix, AZ   85004
Attention:  Treasurer

Ladies and Gentlemen:

                  We  offer  to  purchase,  on  and  subject  to the  terms  and
conditions of the  Distribution  Agreement  filed as an exhibit to the Company's
registration statement on Form S-3 (No. 333-15379)  ("Distribution  Agreement"),
the following Securities ("Notes") on the following terms:

                  Title:  6.72% Senior Notes Due 1999

                  Currency or Currency Units:  United States dollars

                  Stated Maturity:  April 1, 1999

                  Principal Amount:  $50,000,000

                  Public Offering Price:  100%

                  Original Issue Discount Security:  Yes       No    X
                                                         ----      -----
                  Denominations:  $1,000 and integral multiples thereof.

                  Purchase Price (to be paid in immediately available funds):  
                  99.750%, plus accrued interest, if any, from April 10, 1997

                  Underwriting Discount or Commission received from the 
                  Company (%):  .250%

                  Proceeds to Company (If different from Public Offering Price)
                  (%):  99.750%

                  Optional  Redemption (option of the Company):  As described in
                  pages S-3 to S-4 of the Prospectus Supplement,  dated December
                  26, 1996 (the "Prospectus Supplement")
<PAGE>
                  Optional Redemption (option of the Holder):  None

                  Sinking Fund:  None

                  Other Terms:  None

                  Trade Date:  April 7, 1997

                  Settlement Date (Issue Date):  April 10, 1997

                           *       *        *        *        *

Details for Settlement
- ----------------------

                           Exact  name  in which the  Note or  Notes  are to  be
                           registered ("registered owner"):  Cede & Co.

                           Principal   amount  of   each   Note  in   authorized
                           denominations to be delivered to registered owner: 
                           $50,000,000

                           *       *        *        *        *

                  Our  agreement to purchase  the Notes  hereunder is subject to
the  conditions  set  forth  in  the  Distribution   Agreement,   including  the
conditions,  and the delivery of the documents,  set forth in Section 5 thereof.
If  for  any  reason  the  purchase  by the  undersigned  of  the  Notes  is not
consummated  other than because of a default by the  undersigned or a failure to
satisfy a condition  set forth in clause  (ii),  (iii) or (v) of Section 5(c) of
the Distribution Agreement,  the Company shall reimburse the undersigned for all
out-of-pocket expenses reasonably incurred by the undersigned in connection with
the offering of the Notes and not otherwise  required to be reimbursed  pursuant
to Section 4 of the Distribution Agreement.

                  The Notes will have the terms  described in the  Prospectus as
supplemented  by the  Prospectus  Supplement  dated  December  26,  1996 and the
Pricing Supplement No. 1 dated April 7, 1997 (the "Pricing Supplement").

                  The  principal  amount  of  Notes  to  be  purchased  by  each
Distributor is as specified in the Pricing  Supplement.  The  obligations of the
Distributors to purchase the Notes shall be several and not joint.

                  Notwithstanding the terms of the Distribution  Agreement,  the
Company and the  Distributors  agree that the Company  shall prepare the Pricing
Supplement  within a reasonable  time following the Settlement Date (Issue Date)
for the Senior Notes and, on the date of the filing thereof with the Commission,
to hold the Closing Date specified in Section 3(e) of the Distribution Agreement
at 8:00 A.M., Phoenix time, on such date.

                  If  any   Distributor   or   Distributors   default  in  their
obligations to purchase Notes pursuant to this Terms Agreement and the principal
amount of the Notes that such defaulting  Distributor or Distributors agreed but
failed to purchase is ten percent (10%) or less of the  principal  amount of the
Notes, the Distributors  may make  arrangements  satisfactory to the Company for
the purchase of the Notes by other persons,  including any of the  Distributors,
but if no such  arrangements  are made by the  Settlement  Date (Issue Date) the
nondefaulting  Distributors shall be obligated severally, in proportion to their
respective  commitments  hereunder,  to purchase the Notes that such  defaulting
Distributor or Distributors agreed but failed to purchase. If any Distributor or
Distributors so default and the aggregate principal amount of Notes with respect
to which such default or defaults occur is more than the above described  amount
and arrangements  satisfactory to the remaining Distributors and the Company for
purchase of such Notes by other  persons are not made  within  thirty-six  hours
after such default, this 
                                      -2-
<PAGE>
Terms   Agreement  will  terminate   without   liability  on  the  part  of  any
non-defaulting Distributor,  except as provided in Section 9 of the Distribution
Agreement. As used in this Terms Agreement,  the term "Distributor" includes any
person  substituted for a Distributor under this paragraph.  Nothing herein will
relieve a defaulting Distributor from liability for its default.

                  Credit   Suisse   First  Boston   Corporation   is  acting  as
representative  for the  Distributors  specified  in the Pricing  Supplement  in
connection  with the  offering to which this Terms  Agreement  relates,  and any
action  under  this  Terms   Agreement  taken  by  Credit  Suisse  First  Boston
Corporation in such capacity will be binding upon the Distributors to which this
Terms Agreement relates.
                                      -3-
<PAGE>
                  This Terms Agreement shall constitute an agreement between the
Company  and the  undersigned  for the sale and  purchase  of the Notes upon the
terms set forth herein and in the Distribution Agreement.

                                  Very truly yours,

                                  CREDIT SUISSE FIRST BOSTON CORPORATION
                                  SALOMON BROTHERS INC

                                  By:  CREDIT SUISSE FIRST BOSTON CORPORATION



                                  By  Helena Willner 
                                    --------------------------------------------
                                      Vice President
Accepted and agreed to as of the date set forth above.

ARIZONA PUBLIC SERVICE COMPANY


By   Nancy E Felker
   ---------------------------------
     Treasurer
                                      -4-

================================================================================

                         ARIZONA PUBLIC SERVICE COMPANY
               (formerly Central Arizona Light and Power Company)

                                       TO

                              THE BANK OF NEW YORK


                                         As trustee under Central  Arizona Light
                                           and Power Company's Mortgage and Deed
                                           of Trust, Dated as of July 1, 1946.


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

                       Fifty-fifth Supplemental Indenture

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


                            Dated as of April 1, 1997


                       This Mortgage covers real property,
                         personal property and chattels.



              This instrument and the above-mentioned Mortgage and
           Deed of Trust contain after-acquired property provisions.

================================================================================
<PAGE>
                       FIFTY-FIFTH SUPPLEMENTAL INDENTURE

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

         INDENTURE,  dated as of the 1st day of April,  1997,  made and  entered
into by and between ARIZONA PUBLIC SERVICE  COMPANY,  a corporation of the State
of Arizona,  the principal place of business and mailing address of which is 400
North Fifth Street,  Phoenix,  Arizona 85004  (hereinafter  sometimes called the
Company),  party of the first part, and THE BANK OF NEW YORK, a New York banking
corporation,  the  mailing  address of which is 101 Barclay  Street,  21st Floor
West, New York, New York 10286 (hereinafter sometimes called the Trustee), party
of the second part, as Trustee under the Mortgage and Deed of Trust, dated as of
July 1, 1946 (hereinafter called the Mortgage),  which Mortgage was executed and
delivered by the Company under its former name,  Central Arizona Light and Power
Company,  to secure  the  payment of bonds  issued or to be issued  under and in
accordance with the provisions of the Mortgage, reference to which said Mortgage
is hereby made, this Indenture (hereinafter called the Fifty-fifth  Supplemental
Indenture) being supplemental thereto;

         WHEREAS,  said Mortgage was recorded and filed in Counties in the State
of Arizona as follows:
<TABLE>
<CAPTION>
                                                                                             Filed and Abstracted
                                                    Recorded as Real Mortgage                as Chattel Mortgage
                                                -----------------------------------          -------------------
                                                                                              Chattel
                                                  Date         Book or                        Mortgage
                       County                   Recorded       Docket          Page             Book         Page
                       ------                   --------       ------          ----         ------------     ----
<S>                                             <C>              <C>            <C>              <C>         <C>
         Apache...........................       7-28-50          16              1               9           154
         Cochise..........................        2-3-53          80             28              19           292
         Coconino.........................       1-20-53          39              1              10           286
         Gila.............................       1-17-53          32             84              17            --
         Graham...........................       12-3-63          92             87              15           223
         Maricopa.........................        8-6-46         408            163              92           204
         Mohave...........................      11-13-57          28             68              12            13
         Navajo...........................      10-14-49          31            483              16           521
         Pima.............................       1-24-53         558            351              14            --
         Pinal............................      10-25-52          68             31              12           591
         Yavapai..........................        8-7-46          79              1              12           223
         Yuma.............................        8-1-47          58            173              21           265
</TABLE>

and in Counties in the State of New Mexico as follows:
<TABLE>
<S>                                             <C>              <C>            <C>              <C>         <C>
         McKinley.........................       5-31-61          36            153               4           295
         San Juan.........................       1-31-61         472            140                (No. 72441)
</TABLE>

the copy  recorded  in Yuma  County,  Arizona  also being  effective  for La Paz
County,  Arizona,  formed on December 31, 1982; and copies of said Mortgage were
filed with the office of the Bureau of Indian  Affairs at Window Rock,  Arizona,
and with the Navajo Tribe of Indians at Window Rock, Arizona, and in the offices
of the Secretary of State and the State Land  Department of the State of Arizona
(all the said  counties  and the said  offices  above  referred to being  herein
referred to as "jurisdictions"); and
                                       2
<PAGE>
         WHEREAS, by the Mortgage,  the Company covenanted that it would execute
and  deliver  such  supplemental   indenture  or  indentures  and  such  further
instruments  and do such  further  acts as might be necessary or proper to carry
out more  effectually  the  purposes of the  Mortgage and to make subject to the
Lien of the Mortgage any property thereafter  acquired,  made or constructed and
intended to be subject to the Lien thereof; and

         WHEREAS,  the  Company  has  executed  and  delivered  to  the  Trustee
fifty-four  indentures  supplemental to the Mortgage  (hereinafter  respectively
called the First through the Fifty-fourth  Supplemental  Indentures) dated as of
December 1, 1947, April 1, 1949, February 1, 1950, December 1, 1950, February 1,
1953,  November 1, 1953, March 1, 1954, October 1, 1957, March 1, 1959, November
1, 1961, June 1, 1962, December 1, 1962,  September 1, 1963,  September 1, 1967,
April 1, 1970, March 15, 1972,  April 1, 1974,  February 15, 1975, June 1, 1975,
November 15, 1975, April 15, 1977,  January 15, 1978, March 1, 1979, October 15,
1979, May 15, 1980,  February 2, 1982, April 15, 1982, July 1, 1983, October 15,
1983, June 15, 1984,  January 15, 1985, May 1, 1985,  June 1, 1985,  November 1,
1985,  January 15, 1986,  March 1, 1986, May 1, 1986,  February 1, 1987, June 1,
1987,  November 15, 1987, April 1, 1989,  February 15, 1990, May 15, 1990, April
15, 1991,  December 15, 1991,  January 15, 1992,  March 1, 1992,  June 15, 1992,
February 1, 1993, August 1, 1993,  August 1, 1993,  September 15, 1993, March 1,
1994, and November 15, 1996, each of which has been or will be recorded or filed
in, or a  recording  or filing is or will be  effective  with  respect  to, each
jurisdiction referred to above; and

         WHEREAS,  in addition to the  property  described in the  Mortgage,  as
heretofore  supplemented  and amended,  the Company has acquired  certain  other
property, rights and interests in property; and

         WHEREAS,  the Company has  heretofore  issued,  in accordance  with the
provisions of the Mortgage, as heretofore  supplemented and amended,  bonds of a
series  entitled and  designated  First  Mortgage  Bonds, 2 3/4% Series due 1976
(hereinafter  called the bonds of the First Series),  in the aggregate principal
amount of Eight Million Five Hundred Thousand Dollars  ($8,500,000);  bonds of a
series  entitled and  designated  First  Mortgage  Bonds, 3 1/8% Series due 1977
(hereinafter  called the bonds of the Second Series), in the aggregate principal
amount of Two Million Five Hundred  Thousand  Dollars  ($2,500,000);  bonds of a
series  entitled  and  designated  First  Mortgage  Bonds,  3%  Series  due 1979
(hereinafter  called the bonds of the Third Series),  in the aggregate principal
amount of Four  Million  Dollars  ($4,000,000);  bonds of a series  entitled and
designated First Mortgage Bonds, 2 3/4% Series due 1980 (hereinafter  called the
bonds of the Fourth Series),  in the aggregate  principal amount of Five Million
Dollars  ($5,000,000);  bonds of a series entitled and designated First Mortgage
Bonds,  2 7/8%  Series  due 1980  (hereinafter  called  the  bonds of the  Fifth
Series), in the aggregate principal amount of Six Million Dollars  ($6,000,000);
bonds of a series  entitled and designated  First Mortgage  Bonds, 3 1/2% Series
due 1983  (hereinafter  called the bonds of the Sixth Series),  in the aggregate
principal   amount  of  Fourteen   Million   Five   Hundred   Thousand   Dollars
($14,500,000); bonds of a series entitled and designated First Mortgage Bonds, 3
1/2% Series due  November 1, 1983  (hereinafter  called the bonds of the Seventh
Series),  in the  aggregate  principal  amount  of Five  Million  Seven  Hundred
Twenty-three  Thousand  Dollars  ($5,723,000);  bonds of a series  entitled  and
designated First Mortgage Bonds, 3 1/4% Series due 1984 (hereinafter  called the
bonds of the  Eighth  Series),  in the  aggregate  principal  amount of  Fifteen
Million Dollars  ($15,000,000);  bonds of a series entitled and designated First
Mortgage  Bonds,  5 1/8%  Series due 1987  (hereinafter  called the bonds of the
Ninth Series),  in the aggregate  principal  amount of Fifteen  Million  Dollars
($15,000,000);  bonds of a series entitled and designated  First Mortgage Bonds,
4.70% Series due 1989 (hereinafter called the bonds of the Tenth Series), in the
aggregate principal amount of Twenty Million Dollars  ($20,000,000);  bonds of a
series  entitled and  designated  First  Mortgage  Bonds,  4.80% Series due 1991
(hereinafter  called  the  bonds  of the  Eleventh  Series),  in  the  aggregate
                                       3
<PAGE>
principal amount of Thirty-five Million Dollars ($35,000,000); bonds of a series
entitled and designated First Mortgage Bonds, 4.45% Series due 1992 (hereinafter
called the bonds of the Twelfth  Series),  in the aggregate  principal amount of
Twenty-five  Million  Dollars  ($25,000,000);  bonds  of a series  entitled  and
designated First Mortgage Bonds,  4.40% Series due 1992 (hereinafter  called the
bonds  of  the  Thirteenth   Series),  in  the  aggregate  principal  amount  of
Twenty-five  Million  Dollars  ($25,000,000);  bonds  of a series  entitled  and
designated First Mortgage Bonds,  4.50% Series due 1993 (hereinafter  called the
bonds of the Fourteenth  Series),  in the aggregate  principal amount of Fifteen
Million Dollars  ($15,000,000);  bonds of a series entitled and designated First
Mortgage  Bonds,  6.25%  Series  due 1997  (hereinafter  called the bonds of the
Fifteenth  Series),  in the aggregate  principal  amount of Twenty-five  Million
Dollars ($25,000,000);  bonds of a series entitled and designated First Mortgage
Bonds,  8.50%  Series due 1975  (hereinafter  called the bonds of the  Sixteenth
Series),   in  the  aggregate   principal   amount  of  Thirty  Million  Dollars
($30,000,000);  bonds of a series entitled and designated  First Mortgage Bonds,
7.45% Series due 2002 (hereinafter called the bonds of the Seventeenth  Series),
in the aggregate principal amount of Sixty Million Dollars ($60,000,000);  bonds
of a series entitled and designated First Mortgage Bonds,  6.20% Series due 2004
(hereinafter  called  the  bonds of the  Eighteenth  Series),  in the  aggregate
principal  amount  of Fifty  Million  Dollars  ($50,000,000);  bonds of a series
entitled and designated First Mortgage Bonds, 9.50% Series due 1982 (hereinafter
called the bonds of the Nineteenth Series), in the aggregate principal amount of
One Hundred  Million  Dollars  ($100,000,000);  bonds of a series  entitled  and
designated First Mortgage Bonds,  9.80% Series due 1980 (hereinafter  called the
bonds  of  the  Twentieth  Series),   in  the  aggregate   principal  amount  of
Seventy-five  Million  Dollars  ($75,000,000);  bonds of a series  entitled  and
designated First Mortgage Bonds, 10.625% Series due 2000 (hereinafter called the
bonds  of  the  Twenty-first  Series),  in the  aggregate  principal  amount  of
Seventy-five  Million  Dollars  ($75,000,000);  bonds of a series  entitled  and
designated First Mortgage Bonds, 6.45% Series A due 2007 (hereinafter called the
bonds  of the  Twenty-second  Series),  in the  aggregate  principal  amount  of
Thirteen  Million  Dollars  ($13,000,000);   bonds  of  a  series  entitled  and
designated First Mortgage Bonds, 6.45% Series B due 2007 (hereinafter called the
bonds of the Twenty-third  Series),  in the aggregate principal amount of Thirty
Million Dollars  ($30,000,000);  bonds of a series entitled and designated First
Mortgage  Bonds,  6%  Series A due 2008  (hereinafter  called  the  bonds of the
Twenty-fourth  Series), in the aggregate principal amount of Thirty-four Million
Dollars ($34,000,000);  bonds of a series entitled and designated First Mortgage
Bonds,  9.95% Series due 2004 (hereinafter  called the bonds of the Twenty-fifth
Series),  in the aggregate  principal  amount of  Seventy-five  Million  Dollars
($75,000,000);  bonds of a series entitled and designated  First Mortgage Bonds,
12 1/8%  Series  due 2009  (hereinafter  called  the  bonds of the  Twenty-sixth
Series),  in the aggregate  principal  amount of  Seventy-five  Million  Dollars
($75,000,000);  bonds of a series entitled and designated  First Mortgage Bonds,
12 7/8%  Series due 2000  (hereinafter  called  the bonds of the  Twenty-seventh
Series),  in the aggregate  principal amount of One Hundred  Eighty-five Million
Dollars ($185,000,000); bonds of a series entitled and designated First Mortgage
Bonds,  10  3/8%  Series  due  1985   (hereinafter   called  the  bonds  of  the
Twenty-eighth  Series),  in the aggregate  principal amount of Sixty Million Two
Hundred Fifty Thousand  Dollars  ($60,250,000);  bonds of a series  entitled and
designated  First Mortgage Bonds,  16% Series due 1992  (hereinafter  called the
bonds of the  Twenty-ninth  Series),  in the aggregate  principal  amount of One
Hundred  Million  Dollars  ($100,000,000);   bonds  of  a  series  entitled  and
designated First Mortgage Bonds, 12 3/4% Series due 2013 (hereinafter called the
bonds of the Thirtieth Series), in the aggregate principal amount of One Hundred
Million Dollars ($100,000,000);  bonds of a series entitled and designated First
Mortgage  Bonds,  13 1/2% Series due 2013  (hereinafter  called the bonds of the
Thirty-first  Series),  in the aggregate principal amount of One Hundred Million
Dollars ($100,000,000); bonds of a series entitled and designated First Mortgage
Bonds, 15% Series due 1994  (hereinafter  called the bonds of the  Thirty-second
Series),  in the  aggregate  principal  amount of One  Hundred  Million  Dollars
($100,000,000);  bonds of a series entitled and designated First Mortgage Bonds,
12% Series due 1995 (hereinafter  called the bonds of the
                                       4
<PAGE>
Thirty-third   Series),  in  the  aggregate  principal  amount  of  One  Hundred
Twenty-five  Million  Dollars  ($125,000,000);  bonds of a series  entitled  and
designated First Mortgage Bonds, 13 1/4% Series due 2007 (hereinafter called the
bonds of the Thirty-fourth  Series),  in the aggregate principal amount of Fifty
Million Dollars  ($50,000,000);  bonds of a series entitled and designated First
Mortgage  Bonds,  11 1/2% Series due 2015  (hereinafter  called the bonds of the
Thirty-fifth  Series),  in the aggregate  principal  amount of One Hundred Fifty
Million Dollars ($150,000,000);  bonds of a series entitled and designated First
Mortgage  Bonds,  11 1/2% Series due  November 1, 2015  (hereinafter  called the
bonds of the  Thirty-sixth  Series),  in the aggregate  principal  amount of One
Hundred  Million  Dollars  ($100,000,000);   bonds  of  a  series  entitled  and
designated  First Mortgage Bonds,  11% Series due 2016  (hereinafter  called the
bonds of the Thirty-seventh  Series),  in the aggregate  principal amount of One
Hundred  Million  Dollars  ($100,000,000);   bonds  of  a  series  entitled  and
designated First Mortgage Bonds, 9 1/4% Series due 1996 (hereinafter  called the
bonds of the  Thirty-eighth  Series),  in the aggregate  principal amount of One
Hundred  Million  Dollars  ($100,000,000);   bonds  of  a  series  entitled  and
designated  First Mortgage  Bonds,  9% Series due 1996  (hereinafter  called the
bonds of the  Thirty-ninth  Series),  in the aggregate  principal  amount of One
Hundred Twenty-five Million Dollars  ($125,000,000);  bonds of a series entitled
and designated First Mortgage Bonds, 9% Series due 2017 (hereinafter  called the
bonds of the Fortieth Series),  in the aggregate principal amount of One Hundred
Fifty Million Dollars ($150,000,000);  bonds of a series entitled and designated
First Mortgage  Bonds, 9 7/8% Series due 1997  (hereinafter  called the bonds of
the  Forty-first  Series),  in the  aggregate  principal  amount of One  Hundred
Twenty-five  Million  Dollars  ($125,000,000);  bonds of a series  entitled  and
designated First Mortgage Bonds, 10 3/4% Series due 2017 (hereinafter called the
bonds of the  Forty-second  Series),  in the aggregate  principal  amount of One
Hundred  Million  Dollars  ($100,000,000);   bonds  of  a  series  entitled  and
designated First Mortgage Bonds, 10 3/4% Series due 2019 (hereinafter called the
bonds of the  Forty-third  Series),  in the  aggregate  principal  amount of One
Hundred  Million  Dollars  ($100,000,000);   bonds  of  a  series  entitled  and
designated First Mortgage Bonds, 10 1/4% Series due 2000 (hereinafter called the
bonds of the  Forty-fourth  Series),  in the aggregate  principal  amount of One
Hundred  Million  Dollars  ($100,000,000);   bonds  of  a  series  entitled  and
designated First Mortgage Bonds, 10 1/4% Series due 2020 (hereinafter called the
bonds of the  Forty-fifth  Series),  in the  aggregate  principal  amount of One
Hundred Twenty-five Million Dollars  ($125,000,000);  bonds of a series entitled
and designated First Mortgage Bonds, 9 1/2% Series due 2021 (hereinafter  called
the bonds of the Forty-sixth  Series),  in the aggregate principal amount of One
Hundred  Million  Dollars  ($100,000,000);   bonds  of  a  series  entitled  and
designated  First Mortgage  Bonds,  9% Series due 2021  (hereinafter  called the
bonds of the  Forty-seventh  Series),  in the aggregate  principal amount of One
Hundred Fifty Million  Dollars  ($150,000,000);  bonds of a series  entitled and
designated  First  Mortgage  Bonds,  7 1/8%  Series due 1997,  in the  aggregate
principal amount of One Hundred Fifty Million Dollars ($150,000,000),  and bonds
of a series  entitled and  designated  First  Mortgage  Bonds, 8 3/4% Series due
2024,  in the aggregate  principal  amount of One Hundred  Seventy-five  Million
Dollars  ($175,000,000)  (hereinafter  collectively  called  the  bonds  of  the
Forty-eighth  Series);  bonds of a series entitled and designated First Mortgage
Bonds, 7 5/8% Series due 1998, in the aggregate  principal amount of One Hundred
Million  Dollars  ($100,000,000),  and bonds of a series entitled and designated
First Mortgage Bonds, 8 1/8% Series due 2002, in the aggregate  principal amount
of  One  Hundred   Twenty-five  Million  Dollars   ($125,000,000)   (hereinafter
collectively  called  the bonds of the  Forty-ninth  Series);  bonds of a series
entitled  and  designated   First  Mortgage   Bonds,  7  5/8%  Series  due  1999
(hereinafter  called  the  bonds  of the  Fiftieth  Series),  in  the  aggregate
principal  amount of One  Hundred  Million  Dollars  ($100,000,000);  bonds of a
series  entitled  and  designated  First  Mortgage  Bonds,  8%  Series  due 2025
(hereinafter  called  the bonds of the  Fifty-first  Series),  in the  aggregate
principal amount of One Hundred Fifty Million Dollars ($150,000,000); bonds of a
series  entitled and  designated  First  Mortgage  Bonds, 7 1/4% Series due 2023
(hereinafter  called the bonds of the  Fifty-second  Series),  in the  aggregate
principal  amount of One  Hundred  Million  Dollars  ($100,000,000);  bonds of a
series  entitled and  designated  First  Mortgage
                                       5
<PAGE>
Bonds,  5 7/8%  Series due 2028  (hereinafter  called  bonds of the  Fifty-third
Series), in the aggregate principal amount of Twelve Million Eight Hundred Fifty
Thousand Dollars ($12,850,000);  bonds of a series entitled and designated First
Mortgage  Bonds,  5 7/8%  Series  due  2028  (hereinafter  called  bonds  of the
Fifty-fourth Series), in the aggregate principal amount of One Hundred Forty-one
Million One Hundred Fifty  Thousand  Dollars  ($141,150,000);  bonds of a series
entitled  and  designated   First  Mortgage   Bonds,  5  1/2%  Series  due  2028
(hereinafter called bonds of the Fifty-fifth Series), in the aggregate principal
amount of Twenty-five Million Dollars ($25,000,000);  bonds of a series entitled
and designated First Mortgage Bonds, 5 3/4% Series due 2000 (hereinafter  called
bonds of the  Fifty-sixth  Series)  in the  aggregate  principal  amount  of One
Hundred  Million  Dollars  ($100,000,000);   bonds  of  a  series  entitled  and
designated  First  Mortgage  Bonds, 6 5/8% Series due 2004  (hereinafter  called
bonds of the  Fifty-seventh  Series) in the  aggregate  principal  amount of One
Hundred  Million  Dollars  ($100,000,000);  and bonds of a series  entitled  and
designated First Mortgage Bonds,  Senior Note Series A (hereinafter called bonds
of the  Fifty-eighth  Series) in the aggregate  principal  amount of One Hundred
Million Dollars ($100,000,000); and

         WHEREAS,  said The  Bank of New  York,  by an  instrument  in  writing,
effective on the opening of business on September 29, 1995, succeeded to Bank of
America  National  Trust and Savings  Association as Trustee under the Mortgage;
and,  pursuant  to  Section  104 of the  Mortgage,  The  Bank of New York is the
successor Trustee under the Mortgage; and

         WHEREAS,  Section  8 of the  Mortgage  provides  that  the form of each
series of bonds (other than bonds of the First Series) issued  thereunder  shall
be  established  by Resolution of the Board of Directors of the Company and that
the form of each  series,  as  established  by said  Board of  Directors,  shall
specify the descriptive title of the bonds and various other terms thereof,  and
may also contain such  provisions  not  inconsistent  with the provisions of the
Mortgage as the Board of Directors may, in its discretion,  cause to be inserted
therein  expressing  or  referring to the terms and  conditions  upon which such
bonds are to be issued and/or secured under the Mortgage; and

         WHEREAS, Section 120 of the Mortgage provides, among other things, that
any power,  privilege or right expressly or impliedly  reserved to or in any way
conferred upon the Company by any provision of the Mortgage, whether such power,
privilege or right is in any way restricted or is unrestricted,  may be in whole
or in part waived or surrendered or subjected to any  restriction if at the time
unrestricted or to additional restriction if already restricted, and the Company
may enter  into any  further  covenants,  limitations  or  restrictions  for the
benefit of any one or more series of bonds issued thereunder, or the Company may
cure any ambiguity contained therein, or in any supplemental  indenture,  or may
establish the terms and  provisions of any series of bonds other than said First
Series,  by an instrument in writing executed and acknowledged by the Company in
such  manner as would be  necessary  to entitle a  conveyance  of real estate to
record in all of the  states in which any  property  at the time  subject to the
Lien of the Mortgage shall be situated; and

         WHEREAS,  the Company now desires to create a new series of bonds to be
issued under and pursuant to the Mortgage in accordance  with the  provisions of
Article VI thereof,  and to add to its covenants and agreements contained in the
Mortgage,  as heretofore  supplemented and amended,  certain other covenants and
agreements  to be observed by it and to alter and amend in certain  respects the
covenants and provisions contained in the Mortgage,  as heretofore  supplemented
and amended; and

         WHEREAS,  the  Company  has  agreed  to  issue  Fifty  Million  Dollars
($50,000,000)  in aggregate  principal amount of its 6.72% Senior Notes Due 1999
(the "Senior Notes Due 1999")  pursuant to the provisions of the Indenture dated
as of November 15, 1996 (the "Senior Note  Indenture"),  between the 
                                       6
<PAGE>
Company  and The Bank of New York,  as trustee  (said  trustee or any  successor
trustee under the Senior Note  Indenture  being  hereinafter  referred to as the
"Senior Note Trustee"),  as supplemented  by the First  Supplemental  Indenture,
dated as of November 15, 1996, and the Second Supplemental Indenture dated as of
April 1, 1997, between the Company and the Senior Note Trustee; and

         WHEREAS, in order to secure the Company's  obligation to pay principal,
premium,  if any, and interest on the Senior Notes Due 1999 prior to the Release
Date (as hereinafter  defined),  the Company desires to provide for the issuance
under  the  Mortgage  to the  Senior  Note  Trustee  of a new  series  of  bonds
designated "First Mortgage Bonds, Senior Note Series B," having the same rate of
interest, interest payment dates, maturity date and redemption provisions and in
the same aggregate principal amount as the Senior Notes Due 1999; and

         WHEREAS,  the execution and delivery by the Company of this Fifty-fifth
Supplemental  Indenture,  and the terms of the bonds of the  Fifty-ninth  Series
hereinafter  referred to, have been duly authorized by the Board of Directors of
the Company by appropriate Resolutions of said Board of Directors;

         NOW THEREFORE,  THIS INDENTURE WITNESSETH:  That Arizona Public Service
Company,  in  consideration of the premises and of One Dollar to it duly paid by
the  Trustee at or before the  ensealing  and  delivery of these  presents,  the
receipt whereof is hereby acknowledged,  and in further evidence of assurance of
the estate,  title and rights of the Trustee and in order  further to secure the
payment of both the principal of and interest and premium,  if any, on the bonds
from time to time  heretofore,  herewith or hereafter issued under the Mortgage,
according to their tenor and effect,  and the  performance of all the provisions
of  the  Mortgage  (including  any  instruments  supplemental  thereto  and  any
modifications  made  as in the  Mortgage  provided)  and of said  bonds,  hereby
grants,  bargains,  sells, releases,  conveys,  assigns,  transfers,  mortgages,
pledges,  sets over and confirms (subject,  however, to Excepted Encumbrances as
defined  in  Section 6 of the  Mortgage)  unto The Bank of New York,  as Trustee
under the Mortgage,  and to its  successor or  successors in said trust,  and to
said Trustee and its successors and assigns  forever,  all the properties of the
Company  described  in the  Mortgage,  as  heretofore  supplemented  and amended
(except any properties  which have been released from the Lien of the Mortgage),
and all the properties specifically described in Article V hereof.

         Also all other  property,  real,  personal  and  mixed,  of the kind or
nature specifically mentioned in Article V hereof or of any other kind or nature
(except any herein or in the Mortgage,  as heretofore  supplemented and amended,
expressly excepted and except any which may not lawfully be mortgaged or pledged
hereunder), now owned or, subject to the provisions of subsection (I) of Section
87  of  the   Mortgage,   hereafter   acquired  by  the  Company  (by  purchase,
consolidation, merger, donation, construction, erection or in any other way) and
wheresoever situated, including (without in anywise limiting or impairing by the
enumeration  of the same the scope and intent of the foregoing or of any general
description  contained in this  Fifty-fifth  Supplemental  Indenture) all lands,
power  sites,   flowage   rights,   water   rights,   water   locations,   water
appropriations,  ditches, flumes, reservoirs, reservoir sites, canals, raceways,
dams,  dam sites,  aqueducts,  and all other rights or means for  appropriating,
conveying,  storing and supplying water; all rights of way and roads; all plants
for the generation of electricity by steam,  water and/or other power; all power
houses,  gas plants,  street  lighting  systems,  standards and other  equipment
incidental thereto,  telephone,  radio and television systems,  air-conditioning
systems and equipment incidental thereto, water works, water systems, steam heat
and hot water plants,  substations,  lines, service and supply systems, bridges,
culverts, tracks, ice or refrigeration plants and equipment,  offices, buildings
and other structures and equipment  thereof;  all machinery,  engines,  boilers,
dynamos,  electric, gas and other machines,  regulators,  meters,  transformers,
generators, motors, electrical, gas and 
                                       7
<PAGE>
mechanical appliances,  conduits, cables, water, steam heat, gas or other pipes,
gas mains and pipes, service pipes, fittings,  valves and connections,  pole and
transmission lines, wires, cables, tools, implements,  apparatus,  furniture and
chattels;  all franchises,  consents or permits;  all lines for the transmission
and distribution of electric  current,  gas, steam heat or water for any purpose
including towers, poles, wires, cables, pipes, conduits, ducts and all apparatus
for use in connection therewith; all real estate, lands, easements,  servitudes,
licenses, permits, franchises,  privileges, rights of way and other rights in or
relating to public or private  property,  real or personal,  or the occupancy of
such  property  and  (except  as  herein  or  in  the  Mortgage,  as  heretofore
supplemented and amended,  expressly excepted) all the right, title and interest
the Company may now have or hereafter  acquire in and to any and all property of
any kind or nature appertaining to and/or used and/or occupied and/or enjoyed in
connection  with any property  hereinbefore  or in the  Mortgage,  as heretofore
supplemented and amended, described.

         TOGETHER   WITH  all  and   singular  the   tenements,   hereditaments,
prescriptions, servitudes and appurtenances belonging or in anywise appertaining
to the  aforementioned  property or any part  thereof,  with the  reversion  and
reversions,  remainder and  remainders and (subject to the provisions of Section
57 of the  Mortgage)  the tolls,  rents,  revenues,  issues,  earnings,  income,
product and profits  thereof,  and all the estate,  right,  title,  interest and
claim whatsoever,  at law as well as in equity, which the Company now has or may
hereafter acquire in and to the aforementioned property and franchises and every
part and parcel thereof.

         IT IS HEREBY AGREED by the Company that,  subject to the  provisions of
subsection (I) of Section 87 of the Mortgage and to the extent permitted by law,
all the property,  rights and  franchises  acquired by the Company (by purchase,
consolidation,  merger,  donation,  construction,  erection or in any other way)
after the date  hereof,  except any  herein or in the  Mortgage,  as  heretofore
supplemented and amended,  expressly excepted, shall be and are as fully granted
and conveyed hereby and as fully embraced within the lien hereof and the Lien of
the Mortgage as if such property,  rights and  franchises  were now owned by the
Company and were specifically described herein and conveyed hereby.

         PROVIDED  that the  following are not and are not intended to be now or
hereafter granted, bargained, sold, released, conveyed,  assigned,  transferred,
mortgaged,  pledged,  set over or confirmed  hereunder and are hereby  expressly
excepted from the lien and operation of this Fifty-fifth  Supplemental Indenture
and from the Lien and  operation  of the  Mortgage,  viz.:  (1) cash,  shares of
stock,  bonds,  notes and other  obligations and other  securities not hereafter
specifically pledged,  paid, deposited,  delivered or held under the Mortgage or
covenanted  so to  be;  (2)  merchandise,  equipment,  apparatus,  materials  or
supplies held for the purpose of sale or other  disposition  in the usual course
of business;  fuel,  oil and similar  materials  and supplies  consumable in the
operation  of any of the  properties  of  the  Company;  construction  equipment
acquired for  temporary  use; all aircraft,  tractors,  rolling  stock,  trolley
coaches, buses, motor coaches, automobiles,  motor trucks and other vehicles and
materials  and supplies held for the purpose of repairing or replacing (in whole
or part) any of the same; all timber, minerals, mineral rights and royalties and
all  Natural  Gas and Oil  Production  Property,  as defined in Section 4 of the
Mortgage;  (3) bills,  notes and  accounts  receivable,  judgments,  demands and
choses in  action,  and all  contracts,  leases  and  operating  agreements  not
specifically pledged under the Mortgage or covenanted so to be; (4) the last day
of the term of any lease or leasehold which may be or become subject to the Lien
of the Mortgage;  (5) electric  energy,  gas, steam,  ice and other materials or
products generated, manufactured, produced, purchased or acquired by the Company
for sale,  distribution or use in the ordinary  course of its business;  and (6)
the  Company's  franchise  to be a  corporation;  provided,  however,  that  the
property  and  rights  expressly  excepted  from the Lien and  operation  of the
Mortgage in the above subdivisions (2) and (3) shall (to the extent permitted by
law)
                                       8
<PAGE>
cease to be so  excepted  in the event and as of the date that the  Trustee or a
receiver or trustee  shall enter upon and take  possession  of the Mortgaged and
Pledged  Property  in the manner  provided  in Article  XIII of the  Mortgage by
reason of the occurrence of a Default as defined in Section 65 thereof.

         TO HAVE AND TO HOLD all such  properties,  real,  personal  and  mixed,
granted, bargained, sold, released, conveyed, assigned, transferred,  mortgaged,
pledged,  set over or confirmed by the Company as  aforesaid,  or intended so to
be,  unto The Bank of New York,  the  Trustee,  and its  successors  and assigns
forever.

         IN TRUST  NEVERTHELESS,  for the same purposes and upon the same terms,
trusts and conditions and subject to and with the same provisos and covenants as
are set forth in the Mortgage, as supplemented and amended.

         AND IT IS  HEREBY  COVENANTED  by  the  Company  that  all  the  terms,
conditions,  provisos,  covenants and provisions  contained in the Mortgage,  as
supplemented  and amended,  shall affect and apply to the property  hereinbefore
described and conveyed and to the estate, rights,  obligations and duties of the
Company and the Trustee and the  beneficiaries of the trust with respect to said
property,  and to the Trustee and its  successors as Trustee of said property in
the same manner and with the same effect as if the said  property had been owned
by the  Company  at the  time of the  execution  of the  Mortgage  and had  been
specifically  and at length  described  in and  conveyed to said  Trustee by the
Mortgage as a part of the property therein stated to be conveyed.

         The Company  further  covenants  and agrees to and with the Trustee and
its successors in said trust under the Mortgage, as follows:


                                   ARTICLE I.
                          FIFTY-NINTH SERIES OF BONDS.

         SECTION 1. There shall be a series of bonds designated  "First Mortgage
Bonds,  Senior  Note  Series  B"  (hereinafter  sometimes  referred  to  as  the
"Fifty-ninth  Series"  or the  "Senior  Note  Series B  Bonds"),  limited to the
aggregate  principal  amount of  $50,000,000,  each of which shall also bear the
descriptive  title First  Mortgage  Bond,  and the form thereof,  which shall be
established  by  Resolution  of the Board of  Directors  of the  Company,  shall
contain suitable provisions with respect to the matters hereinafter specified in
this Supplemental  Indenture.  Bonds of the Fifty-ninth Series shall be dated as
provided in Section 10 of the Mortgage;  shall mature, subject to the provisions
for prior redemption hereinafter set forth, on April 1, 1999; shall be issued as
fully  registered bonds in denominations of One Thousand Dollars or any integral
multiple  thereof,  and  shall  be  registered  in the name of the  Senior  Note
Trustee;  and shall bear  interest from  April 10, 1997 or from the most  recent
Interest  Payment Date (as defined below) to which interest has been paid at the
rate of 6.72% per  annum  (calculated  on the basis of a 360-day  year of twelve
30-day months), payable on April 1 and October 1 of each year (each an "Interest
Payment Date"), commencing  October 1, 1997, to the holders thereof of record on
the March 15 or September 15, as the case may be, next  preceding  such Interest
Payment Date (subject to the provisions of Section 12 of the Mortgage concerning
legal  holidays and bank  closings),  and the  principal of and interest on, and
premium or other amounts,  if any, payable upon redemption of, each said bond to
be payable at the office or agency of the Company in the  Borough of  Manhattan,
The City of New York, New York, in such coin or currency of the United States of
America  as, at the time of  payment,  is legal  tender for  public and  private
debts; provided,  however, that payment of interest may be made at
                                       9
<PAGE>
the option of the Company by check mailed to the address of the person  entitled
thereto as such address shall appear on the registration books of the Company.

         The  Company's   obligation  to  make  payments  with  respect  to  the
principal,  premium  and/or  interest on the Senior Note Series B Bonds shall be
fully or partially,  as the case may be,  satisfied and discharged to the extent
that, at the time that any such payment shall be due, the  corresponding  amount
of principal of,  premium,  if any, and/or interest then due on the Senior Notes
Due 1999 shall have been fully or partially  paid,  as the case may be, or there
shall have been deposited with the Senior Note Trustee  pursuant to Section 501,
Section  1103,  Section  1205 or Article  Fourteen of the Senior Note  Indenture
trust funds  sufficient  under the  provisions  of said  Sections and Article to
fully or  partially  pay,  as the  case  may be,  the  corresponding  amount  of
principal,  premium,  if any,  and/or  interest then due on the Senior Notes Due
1999.

         SECTION 2. Upon  payment of the  principal  of,  premium,  if any,  and
interest  due on the  Senior  Notes Due 1999,  whether at  maturity  or prior to
maturity by redemption or otherwise,  or upon provision for the payment  thereof
having been made in  accordance  with  Section 501 or Section 1402 of the Senior
Note  Indenture,  Senior Note Series B Bonds in a principal  amount equal to the
principal  amount of Senior  Notes Due 1999 so paid or for which such  provision
for payment has been made shall be deemed fully paid,  satisfied and  discharged
and the  obligations  of the Company  thereunder  shall be  terminated  and such
Senior Note Series B Bonds shall be surrendered to and cancelled by the Trustee.
From and after such date as all bonds  issued  under the  Mortgage  (other  than
Senior  Note First  Mortgage  Bonds,  as such term is defined in the Senior Note
Indenture)  have been retired  through  payment,  redemption,  or otherwise  at,
before or after maturity thereof (the "Release Date"),  the Senior Note Series B
Bonds shall be deemed fully paid, satisfied and discharged and the obligation of
the Company thereunder shall be terminated. On the Release Date, the Senior Note
Series B Bonds shall be surrendered to and cancelled by the Trustee.

         SECTION  3. At the  option of the  registered  owner,  any bonds of the
Fifty-ninth Series, upon surrender thereof,  for cancellation,  at the office or
agency of the Company in the  Borough of  Manhattan,  The City of New York,  New
York, together with a written instrument of transfer, if required by the Company
or by  the  Trustee,  duly  executed  by the  registered  owner  or by his  duly
authorized  attorney,  shall  (subject  to the  provisions  of Section 12 of the
Mortgage) be  exchangeable  for a like  aggregate  principal  amount of bonds in
registered  form of the same series of other  authorized  denominations  without
payment of any sum other than taxes or other governmental charges.

         Bonds of the Fifty-ninth  Series shall be transferable  (subject to the
provisions  of  Section  12 of the  Mortgage)  at said  office  or agency of the
Company  without  payment  of any sum  other  than  taxes or other  governmental
charges.

                                   ARTICLE II.
                    REDEMPTION OF SENIOR NOTE SERIES B BONDS

         The Senior Note Series B Bonds shall be redeemed,  in whole or in part,
from  time to time,  on the date on which a  corresponding  principal  amount of
Senior Notes Due 1999 are redeemed as provided in the Senior Note Indenture upon
the Senior Note Trustee's  notification of the Trustee of such redemption,  at a
redemption  price equal to the  redemption  price of such Senior  Notes Due 1999
being so  redeemed.  Any such  notice  shall be received by the Trustee no later
than 5 days prior to any  redemption  date fixed for the  Senior  Note  Series B
Bonds to be redeemed and shall specify the principal  amount of such Senior Note
Series B Bonds to be redeemed,  the  redemption  date, and the amount of accrued
interest and premium,  if any, to be paid thereon.  The Company shall deposit in
trust with the Trustee on the redemption  date an 
                                       10
<PAGE>
amount  of  money  sufficient  to pay the  principal  amount  including  accrued
interest,  if any, and premium,  if any, on the Senior Note Series B Bonds to be
redeemed.  Upon presentation to the Trustee of any Senior Note Series B Bonds by
the  Senior  Note  Trustee  for  payment,  such  Senior  Note  Series B Bonds so
presented shall be redeemed and paid in full.

         In the event the principal of all Senior Notes Due 1999 is declared due
and payable or becomes  automatically due and payable pursuant to Section 602 of
the Senior Note Indenture,  upon the filing with the Trustee of a written demand
for the  acceleration  of the payment of  principal  of all Senior Note Series B
Bonds,  the payment of  principal on all Senior Note Series B Bonds shall become
immediately  due and payable and the  Trustee  shall  provide to the Senior Note
Trustee an irrevocable,  valid and  unconditional  notice of acceleration of all
Senior Note Series B Bonds.

         Redemption of the Senior Note Series B Bonds shall be effected, without
further  notice by the Company to the Trustee,  by the payment by the Company of
the  applicable  redemption  price  specified  in this  Article  II at the place
specified for payment of principal of and interest on such bonds.

         The Senior  Note  Series B Bonds will not be subject to  prepayment  or
redemption  prior to maturity  except as provided  herein,  notwithstanding  the
provisions  of Section 39 or Section 64 of the  Mortgage,  or with  "Proceeds of
Released Property," as defined in the Mortgage.

         The Senior Note Series B Bonds will not be subject to any sinking fund.

         The Company  covenants and agrees that,  prior to Release Date, it will
not take any action  (except as required by this  Article II hereof)  that would
cause the outstanding  principal  amount of the Senior Note Series B Bonds to be
less than the then outstanding principal amount of the Senior Notes Due 1999.

                                  ARTICLE III.
             REPLACEMENT FUND PROVISIONS -- OTHER RELATED PROVISIONS
             OF THE MORTGAGE -- DIVIDEND COVENANT -- RECORD DATES --
                              AUTHENTICATING AGENT.

         SECTION 4. The Company  covenants  that the provisions of Section 39 of
the  Mortgage,  which were to remain in effect so long as any bonds of the First
Series  remained  Outstanding,  shall remain in full force and effect so long as
any bonds of the Thirty-fourth,  Forty-third, Forty-fourth,  Forty-fifth, Forth-
sixth,  Forty-seventh,   Forty-ninth,   Fiftieth,   Fifty-first,   Fifty-second,
Fifty-third,    Fifty-fourth,     Fifty-fifth,    Fifty-sixth,    Fifty-seventh,
Fifty-eighth, or Fifty-ninth Series are Outstanding.

         Clause  (d)  of  subsection  (II)  of  Section  4 of the  Mortgage,  as
heretofore amended,  clause (6) and clause (e) of Section 5 of the Mortgage,  as
heretofore amended,  and Section 29 of the Mortgage,  as heretofore amended, are
hereby further amended by inserting  therein the words "and Fifty-ninth  Series"
after the words  "bonds of the First  Series and Second  Series and Third Series
and Fourth  Series  and Fifth  Series and Sixth  Series and  Seventh  Series and
Eighth Series and Ninth Series and Tenth Series and Eleventh  Series and Twelfth
Series and  Thirteenth  Series and  Fourteenth  Series and Fifteenth  Series and
Sixteenth  Series and  Seventeenth  Series and Eighteenth  Series and Nineteenth
Series and Twentieth Series and Twenty-first Series and Twenty-second Series and
Twenty-third  Series  and  Twenty-fourth  Series  and  Twenty-fifth  Series  and
Twenty-sixth  Series  and  Twenty-seventh  Series and  Twenty-eighth  Series and
Twenty-ninth   Series  and  Thirtieth   Series  and   Thirty-first   Series  and
Thirty-second  Series  and  Thirty-third  Series  and  Thirty-fourth  Series and
Thirty-fifth  Series  and  Thirty-sixth  Series  and  Thirty-seventh  Series and
Thirty-eighth Series and Thirty-ninth Series and Fortieth Series and 
                                       11
<PAGE>
Forty-first   Series  and  Forty-second   Series  and  Forty-third   Series  and
Forty-fourth   Series  and  Forty-fifth   Series  and  Forty-sixth   Series  and
Forty-seventh Series and Forty-eighth Series and Forty-ninth Series and Fiftieth
Series and Fifty-first Series and Fifty-second Series and Fifty-third Series and
Fifty-fourth   Series  and  Fifty-fifth   Series  and  Fifty-sixth   Series  and
Fifty-seventh  Series  and  Fifty-eighth  Series"  each  time such  words  occur
therein.

         Clause  (e)  of  subsection  (II)  of  Section  4 of the  Mortgage,  as
heretofore amended, is hereby further amended by the insertion therein after the
words "and Fifty-eighth" the words "and Fifty-ninth."

         The  last  paragraph  of  Section  12 of the  Mortgage,  as  heretofore
amended,  the last  paragraph  of  Section  17 of the  Mortgage,  as  heretofore
amended,  and the last  paragraph of Section 110 of the Mortgage,  as heretofore
amended,  are hereby amended by inserting  therein the words "or the Fifty-ninth
Series"  after the words  "Fifty-eighth  Series"  each  time  such  words  occur
therein..


                                   ARTICLE IV.
                            MISCELLANEOUS PROVISIONS.

         SECTION  5. The terms  defined in the  Mortgage,  as  supplemented  and
amended,  shall,  for all purposes of this Fifty-fifth  Supplemental  Indenture,
have the meanings specified therein,  except that the term "Mortgage" shall mean
only the original Mortgage and Deed of Trust, dated as of July 1, 1946; the term
"Mortgage,  as heretofore  supplemented and amended" shall mean the Mortgage, as
supplemented  and  amended  by  the  First  through  Fifty-fourth   Supplemental
Indentures hereinabove referred to; and the term "Mortgage,  as supplemented and
amended,"  shall mean the  Mortgage,  as  supplemented  and amended by the First
through  Fifty-fourth  Supplemental  Indentures  hereinabove  referred to and as
supplemented  and amended by this  Fifty-fifth  Supplemental  Indenture  and any
future supplemental indentures.

         SECTION 6. 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 Mortgage, 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  Fifty-fifth  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 XVII of the Mortgage shall apply to and form part
of this Fifty-fifth  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 Fifty-fifth Supplemental Indenture.

         SECTION 7. Whenever in this Fifty-fifth  Supplemental  Indenture either
of the  parties  hereto is named or  referred  to,  this  shall,  subject to the
provisions  of Articles XVI and XVII of the  Mortgage,  be deemed to include the
successors  and assigns of such party,  and all the covenants and  agreements in
this Fifty-fifth Supplemental Indenture contained by or on behalf of the Company
or by or on behalf of the Trustee shall, subject as aforesaid, bind and inure to
the  respective  benefits  of the  respective  successors  and  assigns  of such
parties, whether so expressed or not.
                                       12
<PAGE>
         SECTION  8.  Nothing  in  this  Fifty-fifth   Supplemental   Indenture,
expressed or implied,  is intended or shall be  construed to confer upon,  or to
give to, any person, firm or corporation,  other than the parties hereto and the
holders of the bonds Outstanding under the Mortgage,  any right, remedy or claim
under or by reason of this Fifty-fifth  Supplemental  Indenture or any covenant,
condition,  stipulation,  promise or agreement  hereof,  and all the  covenants,
conditions,   stipulations,   promises  and   agreements  in  this   Fifty-fifth
Supplemental Indenture contained by or on behalf of the Company shall be for the
sole and exclusive benefit of the parties hereto and of the holders of the bonds
Outstanding under the Mortgage.

         SECTION 9. This  Fifty-fifth  Supplemental  Indenture  may be  executed
simultaneously in several  counterparts,  each of which shall be an original and
all of which shall constitute but one and the same instrument.


                                   ARTICLE V.
                        SPECIFIC DESCRIPTION OF PROPERTY.

         SECTION 10.  CERTAIN REAL PROPERTY LOCATED IN:

                                 MARICOPA COUNTY

                               Javelina Substation

That portion of the Southeast  quarter of the Southeast quarter of the Southeast
quarter of Section 1, Township 3 North,  Range 2 West of the Gila and Salt River
Base and Meridian,  Maricopa County,  Arizona,  more  particularly  described as
follows:

         COMMENCING  at the Southeast  corner of said  Section;  
     Thence North  00  degrees 59 minutes 19 seconds West along the East line of
         said Section 1, a distance of 420 feet to the POINT OF BEGINNING of the
         property herein described;
     Thence South 89 degrees 00 minutes 41 seconds West, 305 feet;  
     Thence North 00 degrees 59 minutes 19 seconds West, 240 feet; 
     Thence North 89 degrees 00 minutes 41  seconds East, 305 feet to a point on
         the East line of said  Section 1, said point  bears North 00 degrees 59
         minutes 19 seconds  West,  660 feet from the  Southeast  corner of said
         Section 1;
     Thence South 00 degrees 59 minutes 19 seconds  East along said East Section
         line, a distance of 240 feet to the POINT OF BEGINNING.
         EXCEPT the East 33 feet.

                                  MOHAVE COUNTY

                               Kingman Power Plant

Parcel 14-B as shown on the Record of Survey recorded September 19, 1996 in Book
14 of Records of  Survey,  Page 64, and being a portion of Parcel  14-B shown on
Record of Survey  recorded  October 16,  1995,  in Book 13 of Records of Survey,
Page 23,  being  located in the North half  (N1/2) of Section  14,  Township  19
North,  Range  18 West of the  Gila and Salt  River  Base and  Meridian,  Mohave
County, Arizona.
                                       13
<PAGE>
TOGETHER WITH an easement for ingress, egress, and public utilities installation
located  within the  easement  shown on Record of Survey  recorded in Book 14 of
Records of Survey, Page 64, described as follows:

Beginning at the Northeast corner of said Section 14, being a found 2 inch brass
disk in concrete, down 1.5 feet on dirt road, LS 6452; thence South 0 degrees 13
minutes 47 seconds  West along the East line of said  Section  14, a distance of
42.00 feet to a point on the current Southerly right-of-way line of Yucca Drive,
being a found 5/8 inch rebar with an aluminum  cap stamped LS 25074,  Holmquist,
herein described as (mon.), said point being the TRUE POINT OF BEGINNING; thence
South 0 degrees 13 minutes 47 seconds  West along said East line,  a distance of
8.00 feet to mon.;  thence North 89 degrees 40 minutes 57 seconds West  parallel
to and 50.00 feet  Southerly of the North line of said Section 14, a distance of
264.92 feet to a mon. and a point of a curvature;  thence  Southwesterly along a
curve LEFT, an arc distance of 78.62 feet,  having a radius of 50.00 feet, and a
delta of 90 degrees 05 minutes 29 seconds to a mon.;  thence  South 0 degrees 13
minutes 47 seconds West, a distance of 599.85 feet to a mon., and a point on the
Northerly  line of Parcel 14-B1 (ROS 14/64);  thence North 89 degrees 46 minutes
13 seconds West along said Northerly  line, a distance of 100.00 feet to a mon.;
thence North 0 degrees 13 minutes 47 seconds  East, a distance of 600.15 feet to
a mon., and a point of curvature;  thence  Northwesterly  along a curve LEFT, an
arc  distance  of 78.46 feet,  having a radius of 50.00 feet,  and a delta of 89
degrees 54 minutes  31 seconds to a mon.;  thence  North 0 degrees 19 minutes 03
seconds  East,  a  distance  of 8.00  feet to a point on the  current  Southerly
right-of-way line of Yucca Drive;  thence South 89 degrees 40 minutes 57 seconds
East along said  right-of-way  line,  a  distance  of 464.91  feet more or less,
returning to the TRUE POINT OF BEGINNING.

                                 YAVAPAI COUNTY

                            Prescott Service Center A

That portion of Sheldon Street of the Original  Townsite of Prescott as recorded
in Book 4 of Maps,  and  Plats,  Page 22 on file at the  Office  of the  Yavapai
County  Recorder,  Yavapai  County,  Arizona,  more  particularly  described  as
follows:

Commencing at the  intersection  of the Westerly  right-of-way of Granite Street
and the Southerly  right-of-way of Sheldon Street,  said intersection point also
being the Northeast corner of Lot 1, Block "A" of said original Townsite; 
Thence West (assumed  bearing) along the Southerly  right-of-way of said Sheldon
Street, 209.12 feet to the TRUE POINT OF BEGINNING of this description;
Thence continuing West along the said Southerly  right-of-way of Sheldon Street,
124.12 feet to the  intersection  of the said Southerly  right-of-way of Sheldon
Street and the Easterly right-of-way of McCormick Street in said block "A";
Thence North,  66.25 feet to the  intersection of the Northerly  right-of-way of
said Sheldon Street and the Northerly  prolongation of the Easterly right-of-way
of McCormick Street;
Thence East along the  Northerly  right-of-way  of said Sheldon  Street,  124.12
feet;
Thence South, 66.25 feet to the TRUE POINT OF BEGINNING.
                                       14
<PAGE>
                            Prescott Service Center B

That part of Lot 7, Section 33, Township 14 North,  Range 2 West of the Gila and
Salt River Base and Meridian, Yavapai County, Arizona, described as follows:

COMMENCING  at that  certain  point from whence the one  quarter  corner of said
Section 33 and Section 34 bears  North 60' 11" East a distance of 2571.65  feet;
thence North 0(degree) 46' 43" East, a distance of 130 feet to a point;
thence South  89(degree) 13' 17" East, a distance of 180 feet to a point;  
thence North 0(degree) 46' 43" East, a distance of 75 feet to a point;
thence South 89(degree) 13'17" East, a distance of 160 feet to a point;
thence North  0(degree) 46' 43" East a distance of 150 feet to the TRUE POINT OF
BEGINNING;
thence North 56(degree) 00' East 48.2 feet to a corner of the property described
in  instrument  recorded  in Book 158 of Deeds,  page 389,  records  of  Yavapai
County, Arizona;
thence  along the Westerly  boundary  line of property  described in  instrument
recorded in Book 158 of Deeds,  page 389,  records of Yavapai  County,  Arizona,
over the following courses:

         East 13.0 feet to a point;
         North 5(degree) 00' East 32.0 feet to a point;
         North 85(degree) 00' West 16.0 feet to a point;
         North 4(degree) 01' East 25.7 feet to a point;
         North 59(degree) 14' East to the point of intersection

with the Southerly  boundary line or the Easterly  extension thereof of Bashford
Addition  First  Subdivision,  accord  to Book 2 of Maps,  page 94,  records  of
Yavapai County,  Arizona;  thence Westerly along the said Southerly line and the
Easterly  extension  thereof of said Bashford  Addition First Subdivision to the
point of intersection with the Easterly line of property described in instrument
recorded in Book 19 of Deeds, page 575, records of Yavapai County, Arizona;

thence  Southerly  along  the  said  Easterly  line  of  property  described  in
instrument  recorded in Book 19 of Deeds,  page 575,  records of Yavapai County,
Arizona,  to the  point of  intersection  with the  Northerly  boundary  line of
property described in Parcel 3 of instrument recorded in Book 193 of Deeds, page
46, records of Yavapai  County,  Arizona; 
thence  North  89(degree)  13' 17" West along  said  Northerly  boundary  line a
distance of 325 feet;
thence North 0(degree) 46' 43" East, a distance of 20 feet to a point;
thence south  89(degree)  13' 17" East, a distance of 160 feet to the TRUE POINT
OF BEGINNING.

         SECTION 11. THE  ELECTRIC  SUBSTATIONS  OF THE COMPANY,  including  all
buildings,  structures, towers, poles, all equipment, appliances and devices for
transforming, converting and distributing electric energy, and all land owned by
the  Company  upon  which  the  same  are  situated,  and  all of the  Company's
easements,  rights of way, rights, machinery,  equipment,  appliances,  devices,
licenses  and  supplies  forming  a part of said  substations,  or any of  them,
including additions and improvements to any of the foregoing, or used or enjoyed
or capable of being used or enjoyed in conjunction with any thereof.

         SECTION 12.  Additions,  extensions  and  improvements  to THE ELECTRIC
TRANSMISSION SYSTEMS of the Company including,  among other things, 4.3 miles of
69kV from  Willow Lake to Bald  Mountain;  3.0 miles of 69kV from Casa Grande to
East Gate Tap;  242.7 miles of 500kV (joint  ownership)  from West Wing to Mead;
and 13.3 miles of 500kV (joint ownership) from Mead to Market Place.
                                       15
<PAGE>
         SECTION 13.  Additions,  extensions  and  improvements  to THE ELECTRIC
DISTRIBUTION  SYSTEMS of the Company,  including the  construction of additional
facilities  throughout  the  Company's  service  area,  as well as  extension of
residential  and  downtown  underground   distribution   facilities,   including
associated  distribution equipment such as voltage regulators,  capacitor banks,
sectionalizing  equipment,  transformers,  street lighting  systems,  meters and
services, including reconstruction and improvements to provide efficient Company
operation.
                                       16
<PAGE>
         IN WITNESS WHEREOF, ARIZONA PUBLIC SERVICE COMPANY, party hereto of the
first  part,  has caused its  corporate  name to be hereunto  affixed,  and this
instrument to be signed and sealed by its President, one of its Vice Presidents,
or its Treasurer,  and its corporate seal to be attested by its Secretary or one
of its Assistant  Secretaries or Associate Secretaries for and in its behalf, in
the City of  Phoenix,  Arizona,  and THE BANK OF NEW YORK,  party  hereto of the
second part,  has caused its  corporate  name to be hereunto  affixed,  and this
instrument  to be signed and sealed by one of its Vice  Presidents  or Assistant
Vice  Presidents  and its corporate  seal to be attested by one of its Assistant
Vice  Presidents or Assistant  Treasurers for and in its behalf,  in the City of
New York, New York, all as of the 1st day of April, 1997.

                                              ARIZONA PUBLIC SERVICE COMPANY

                                                      Nancy E. Felker
                                              ------------------------------
                                                         Treasurer

Attest:

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

Executed, sealed and delivered by 
  ARIZONA PUBLIC SERVICE COMPANY 
  in the presence of:

Brenda M. Kucharek
- --------------------------------------
Brenda M. Kucharek

Marie A. Papietro                                        [SEAL]
- --------------------------------------
Marie A. Papietro

                                               THE BANK OF NEW YORK, As Trustee

                                                        Walter N. Gitlin
                                               ---------------------------------
                                                         Vice President
Attest:

Stephen Giurlando
- --------------------------------------
     Assistant Vice President

Executed, sealed and delivered by 
  THE BANK OF NEW YORK in the 
  presence of:

Laura Mullen
- --------------------------------------
Laura Mullen
                                                            [SEAL]
Jason Gregory
- --------------------------------------
Jason Gregory
                                       17
<PAGE>
STATE OF ARIZONA                    )
                                    )  ss.:
COUNTY OF MARICOPA                  )

         On this  9th  day of  April,  1997,  before  me,  Maria R.  Marrs,  the
undersigned  officer,  personally  appeared  Nancy E. Felker,  who  acknowledged
herself  to be the  Treasurer  of ARIZONA  PUBLIC  SERVICE  COMPANY,  an Arizona
corporation, and that she, as such Treasurer being authorized so to do, executed
the foregoing instrument for the purposes therein contained, by signing the name
of the corporation by herself as Treasurer.

         IN WITNESS WHEREOF, I have hereunto set my hand and seal.

                                                      Maria R. Marrs
                                       -----------------------------------------
                                                     Notary Public

                                       My Commission Expires     July 21, 1998
[SEAL]                                                       -------------------

STATE OF ARIZONA                    )
                                    )  ss.:
COUNTY OF MARICOPA                  )

         On this  9th day of  April,  1997,  before  me,  Maria  R.  Marrs,  the
undersigned officer,  personally came Nancy E. Felker, to me known, who being by
me duly sworn, did depose and say that she resides in Phoenix, Arizona, that she
is the Treasurer of ARIZONA PUBLIC SERVICE COMPANY, the corporation described in
and  which  executed  the  above  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 order of the Board of Directors  of said  corporation,
and that she signed her name thereto by like order.

         IN WITNESS WHEREOF, I have hereunto set my hand and seal.

                                                 Maria R. Marrs
                                       -----------------------------------------
                                                  Notary Public

                                       My Commission Expires     July 21, 1998
[SEAL]                                                       -------------------

STATE OF ARIZONA                    )
                                    ) ss.:
COUNTY OF MARICOPA                  )

         This instrument was acknowledged before me on April 9, 1997 by Nancy E.
Felker  and  Betsy  A.   Pregulman,   as  Treasurer  and  Associate   Secretary,
respectively, of ARIZONA PUBLIC SERVICE COMPANY.

                                                 Maria R. Marrs
                                       -----------------------------------------
                                                  Notary Public                 
                                                                                
                                       My Commission Expires     July 21, 1998  
[SEAL]                                                       -------------------
                                       18
<PAGE>
STATE OF NEW YORK                   )
                                    ) ss.:
COUNTY OF NEW YORK                  )

         On this 8th day of April,  1997, before me, William J. Cassels,  Notary
Public  in and for the  County  and  State  aforesaid,  residing  therein,  duly
commissioned and sworn,  personally appeared Walter N. Gitlin, known to me to be
a Vice  President of THE BANK OF NEW YORK, New York banking  corporation,  which
executed the within  instrument,  and Stephen J.  Giurlando  known to me to be a
Assistant  Vice  President of The Bank of New York,  who being by me duly sworn,
acknowledged before me that the seal affixed to said instrument is the corporate
seal of The Bank of New York, that they, being authorized so to do, executed the
within instrument on behalf of The Bank of New York by authority of its board of
directors,  and that said instrument is the free act and deed of The Bank of New
York for the purposes therein contained.

         IN WITNESS WHEREOF, I have hereunto set my hand and affixed my official
seal the day and year in this certificate first above written.

                                               William J. Cassels
                                       -----------------------------------------
                                                  Notary Public                 
                                                                                
                                       My Commission Expires     May  16, 1998  
[SEAL]                                                       -------------------

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

         This instrument was  acknowledged  before me on April 8, 1997 by Walter
N.  Gitlin  and  Stephen J.  Giurlando  as Vice  President  and  Assistant  Vice
President, respectively, of THE BANK OF NEW YORK.


                                               William J. Cassels
                                       -----------------------------------------
                                                  Notary Public                 
                                                                                
                                       My Commission Expires     May  16, 1998  
[SEAL]                                                       -------------------


Number B-1                                                           $50,000,000


                                       APS
                         ARIZONA PUBLIC SERVICE COMPANY
                              FIRST MORTGAGE BOND,
                              SENIOR NOTE SERIES B

         Arizona Public Service  Company,  a corporation of the State of Arizona
(hereinafter called the Company), for value received,  hereby promises to pay to
THE BANK OF NEW YORK, as Trustee,  or registered  assigns,  the principal sum of
Fifty Million  Dollars on April 1, 1999, and to pay interest  thereon from April
10, 1997 or from the most recent  Interest  Payment Date (as defined below) with
respect to which  interest has been paid or duly provided for,  semianually,  on
April 1 and October 1 in each year (each an "Interest Payment Date"), commencing
October 1, 1997,  at the rate of 6.72% per annum  (calculated  on the basis of a
360-day year of twelve 30-day  months),  until the  principal  hereof is paid or
made  available for payment to the holder of record of this bond on the March 15
or September 15, as the case may be, next preceding such Interest  Payment Date,
unless such day is a legal holiday or a day on which banking institutions in The
City of New York are  authorized  to remain  closed,  in which  case on the next
preceding  day  which  shall  not  be a  legal  holiday  or day  on  which  such
institutions are authorized by law to remain closed. Payment of the principal of
(and  premium,  if any) and  interest on this bond will be made at the office or
agency of the Company  maintained  for that purpose in the Borough of Manhattan,
The City of New York, 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 payment of interest may be made at the
option of the  Company by check  mailed to the  address  of the person  entitled
thereto as such address shall appear on the registration books of the Company.

         This bond shall not become  obligatory  until The Bank of New York, the
Trustee under the Mortgage, or its successor  thereunder,  shall have signed the
form of authentication certificate endorsed hereon.

         IN WITNESS WHEREOF, Arizona Public Service Company has caused this bond
to be  signed  in its  corporate  name  by  its  President  or  one of its  Vice
Presidents  and its  corporate  seal to be  impressed  or  imprinted  hereon and
attested by its Secretary or one of its Assistant Secretaries.


         DATED:  April 10, 1997


                                            ARIZONA PUBLIC SERVICE COMPANY

                                             George A. Schreiber, Jr.
                                            -----------------------------------
                                            Executive Vice President and
                                            Chief Financial Officer


                                            ATTEST:

                                             Nancy C. Loftin
                                            -----------------------------------
                                            Vice President, Chief Legal Counsel
                                            and Secretary

TRUSTEE'S AUTHENTICATION CERTIFICATE

         This  bond  is one of the  bonds,  of  the  series  herein  designated,
described or provided for in the within mentioned Mortgage.

THE BANK OF NEW YORK, AS TRUSTEE


By  Walter N. Gitlin
  ------------------------------
      Authorized Signatory
<PAGE>
                         ARIZONA PUBLIC SERVICE COMPANY

                   First Mortgage Bond, Senior Note Series B

         This bond is one of an issue of bonds of the Company issuable in series
and is one of a series known as its First Mortgage Bonds,  Senior Note Series B,
all bonds of all  series  issued  and to be issued  under  and  equally  secured
(except insofar as any sinking or other fund, established in accordance with the
provisions of the Mortgage hereinafter mentioned, may afford additional security
for the bonds of any particular series) by a Mortgage and Deed of Trust (herein,
together with any indenture  supplemental  thereto,  including the  supplemental
indentures  dated as of  December  1,  1947,  April 1, 1949,  February  1, 1950,
December 1, 1950,  February 1, 1953, November 1, 1953, March 1, 1954, October 1,
1957, March 1, 1959, November 1, 1961, June 1, 1962, December 1, 1962, September
1, 1963,  September  1,  1967,  April 1, 1970,  March 15,  1972,  April 1, 1974,
February 15, 1975, June 1, 1975,  November 15, 1975, April 15, 1977, January 15,
1978, March 1, 1979, October 15, 1979, May 15, 1980, February 2, 1982, April 15,
1982, July 1, 1983,  October 15, 1983,  June 15, 1984,  January 15, 1985, May 1,
1985, June 1, 1985,  November 1, 1985,  January 15, 1986,  March 1, 1986, May 1,
1986, February 1, 1987, June 1, 1987, November 15, 1987, April 1, 1989, February
15, 1990,  May 15, 1990,  April 15, 1991,  December 15, 1991,  January 15, 1992,
March 1, 1992, June 15, 1992,  February 1, 1993, August 1, 1993, August 1, 1993,
September 15, 1993, March 1, 1994,  November 15, 1996, and April 1, 1997, called
the Mortgage)  dated as of July 1, 1946,  executed by the Company to The Bank of
New York, as Trustee. Reference is made to the Mortgage for a description of the
property  mortgaged  and  pledged,  the nature and extent of the  security,  the
rights of the  holders of the bonds and of the Trustee in respect  thereof,  the
duties and immunities of the Trustee,  the terms and  conditions  upon which the
bonds are and are to be secured,  and the  circumstances  under which additional
bonds may be issued. With the consent of the Company and to the extent permitted
by and as provided in the Mortgage,  the rights and  obligations  of the Company
and/or the rights of the holders of the bonds and/or the terms and provisions of
the Mortgage may be modified or altered by affirmative vote of the holders of at
least seventy per centum (70%) in principal amount of the bonds then outstanding
under the  Mortgage  and, if the rights of the holders of one or more,  but less
than all,  series of bonds then  outstanding  are to be  affected,  then also by
affirmative  vote of the  holders  of at  least  seventy  per  centum  (70%)  in
principal  amount of the bonds then outstanding of each series of bonds so to be
affected  (excluding in any case bonds disqualified from voting by reason of the
Company's interest therein as provided in the Mortgage);  provided that, without
the consent of the holder  hereof,  no such  modification  or alteration  shall,
among other things,  impair or affect the right of the holder to receive payment
of the principal of and interest on this bond and other amounts, if any, payable
upon the  redemption  hereof on or after  the  respective  due  dates  expressed
herein,  or permit  the  creation  of any lien equal or prior to the lien of the
Mortgage  or deprive the holder of the  benefit of a lien on the  mortgaged  and
pledged property.

         The Company has issued Fifty Million Dollars ($50,000,000) in aggregate
principal  amount of its 6.72%  Senior  Notes  Due 1999 (the  "Senior  Notes Due
1999") pursuant to the provisions of the Indenture dated as of November 15, 1996
(the "Senior Note Indenture"),  between the Company and The Bank of New York, as
trustee (said trustee or any successor  trustee under the Senior Note  Indenture
being hereinafter referred to as the "Senior Note Trustee"),  as supplemented by
the First Supplemental Indenture,  dated as of November 15, 1996, and the Second
Supplemental  Indenture  dated as of April 1, 1997  between  the Company and the
Senior Note Trustee (each,  the "First  Supplemental  Indenture" and the "Second
Supplemental Indenture," and collectively, the "Supplemental Indentures").

         The Company has issued the bonds of this series to secure the Company's
obligation to pay principal,  premium,  if any, and interest on the Senior Notes
Due 1999 prior to the Release Date (as hereinafter defined).

         The  Company's   obligation  to  make  payments  with  respect  to  the
principal, premium and/or interest on the bonds of this series shall be fully or
partially,  as the case may be,  satisfied and discharged to the extent that, at
the time  that any  such  payment  shall be due,  the  corresponding  amount  of
principal of, premium,  if any, and/or interest then due on the Senior Notes Due
1999 shall have been fully or partially paid, as the case may be, or there shall
have been  deposited  with the Senior  Note  Trustee  pursuant  to Section  501,
Section  1103,  Section  1205 or Article  Fourteen of the Senior Note  Indenture
trust funds  sufficient  under the  provisions  of said  Sections and Article to
fully or  partially  pay,  as the  case  may be,  the  corresponding  amount  of
principal,  premium,  if any,  and/or  interest then due on the Senior Notes Due
1999.

         Upon payment of the principal of, premium,  if any, and interest due on
the  Senior  Notes  Due  1999,  whether  at  maturity  or prior to  maturity  by
redemption or otherwise,  or upon provision for the payment  thereof having been
made  in  accordance  with  Section  501 or  Section  1402  of the  Senior  Note
Indenture,  bonds of this
<PAGE>
series in a principal  amount equal to the principal  amount of Senior Notes Due
1999 so paid or for which  such  provision  for  payment  has been made shall be
deemed fully paid,  satisfied and discharged and the  obligations of the Company
thereunder  shall  be  terminated  and  such  bonds  of  this  series  shall  be
surrendered  to and  cancelled by the  Trustee.  From and after such date as all
bonds issued under the Mortgage (other than Senior Note First Mortgage Bonds, as
such term is defined in the Senior Note  Indenture)  have been  retired  through
payment,  redemption,  or otherwise  at, before or after  maturity  thereof (the
"Release Date"), the bonds of this series shall be deemed fully paid,  satisfied
and discharged and the obligation of the Company  hereunder shall be terminated.
On the  Release  Date,  the bonds of this  series  shall be  surrendered  to and
cancelled by the Trustee.

         This  bond  is  transferable  as  prescribed  in  the  Mortgage  by the
registered owner hereof in person,  or by his duly authorized  attorney,  at the
office or agency of the Company or at the office or agency of the Company in the
Borough  of  Manhattan,  The City of New York,  New  York,  upon  surrender  and
cancellation of this bond, and thereupon a new fully registered bond of the same
series for a like principal  amount will be issued to the transferee in exchange
herefor as provided in the Mortgage.

         In the manner  prescribed in the Mortgage,  bonds of this series,  upon
surrender thereof,  for cancellation,  at the office or agency of the Company in
the  Borough  of  Manhattan,  The City of New York,  New York,  together  with a
written  instrument  of transfer,  if required by the Company or by the Trustee,
duly executed by the registered  owner or by his duly authorized  attorney,  are
exchangeable  for a like aggregate  principal amount of bonds in registered form
of the same series of other authorized  denominations.  Bonds of this series are
issuable in  denominations  of One Thousand  Dollars or any  integral  multiples
thereof.

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

         The bonds of this series shall be redeemed,  in whole or in part,  from
time to time, on the date on which a  corresponding  principal  amount of Senior
Notes Due 1999 are  redeemed as provided  in the Senior Note  Indenture  and the
Second Supplemental Indenture upon the Senior Note Trustee's notification of the
Trustee of such redemption,  at a redemption price equal to the redemption price
of such  Senior  Notes Due 1999  being so  redeemed.  Any such  notice  shall be
received by the Trustee no later than 5 days prior to any redemption  date fixed
for the bonds of this series to be  redeemed  and shall  specify  the  principal
amount of such bonds of this series to be redeemed, the redemption date, and the
amount of accrued interest and premium, if any, to be paid thereon.  The Company
shall  deposit in trust with the  Trustee  on the  redemption  date an amount of
money sufficient to pay the principal amount including accrued interest, if any,
and  premium,  if  any,  on the  bonds  of  this  series  to be  redeemed.  Upon
presentation  to the  Trustee  of any bonds of this  series by the  Senior  Note
Trustee for payment,  such bonds of this series so  presented  shall be redeemed
and paid in full.

         In the event the principal of all Senior Notes Due 1999 is declared due
and payable or becomes  automatically due and payable pursuant to Section 602 of
the Senior Note Indenture,  upon the filing with the Trustee of a written demand
for the  acceleration  of the payment of principal of all the bonds,  such bonds
shall become immediately due and payable.

         Redemption  of the  bonds of this  series  shall be  effected,  without
further  notice by the Company to the Trustee,  by the payment by the Company of
the applicable  redemption  price  specified in this bond at the place specified
for payment of principal of and interest on such bonds.
<PAGE>
         The Senior  Note  Series B Bonds will not be subject to  prepayment  or
redemption  prior to maturity  except as provided  herein,  notwithstanding  the
provisions  of Section 39 or Section 64 of the  Mortgage,  or with  "Proceeds of
Released Property," as defined in the Mortgage.

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

         The Company  covenants and agrees that,  prior to Release Date, it will
not take any action  (except  as  described  in this bond) that would  cause the
outstanding  principal  amount of the  bonds of this  series to be less than the
then outstanding principal amount of the Senior Notes Due 1999.

         The Company and the Trustee may deem and treat the person in whose name
this  bond is  registered  as the  absolute  owner  hereof  for the  purpose  of
receiving  payment and for all other  purposes,  and neither the Company nor the
Trustee shall be affected by any notice to the contrary.

         No  recourse  shall  be had  for the  payment  of the  principal  of or
interest on this bond against any  incorporator  or any past,  present or future
subscriber to the capital stock, stockholder, officer or director of the Company
or of any  predecessor or successor  corporation,  as such,  either  directly or
through the Company or any predecessor or successor corporation,  under any rule
of law,  statute or  constitution  or by the  enforcement  of any  assessment or
otherwise,  all such  liability  of  incorporators,  subscribers,  stockholders,
officers  and  directors  being  released  by the holder or owner  hereof by the
acceptance of this bond and being  likewise  waived and released by the terms of
the Mortgage.

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

                         ARIZONA PUBLIC SERVICE COMPANY

                                       TO

                              THE BANK OF NEW YORK

                                     Trustee

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

                          Second Supplemental Indenture

                            Dated as of April 1, 1997

                                       To

                                    Indenture

                          Dated as of November 15, 1996

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


                           6.72% Senior Notes Due 1999

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

<PAGE>
         SECOND  SUPPLEMENTAL  INDENTURE,  dated as of April  1,  1997,  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 The Bank
of New York,  a New York  banking  corporation,  as Trustee  (herein  called the
"Trustee") under the Indenture dated as of November 15, 1996 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 Senior  Notes (the  "Notes"),
said Notes to be issued in one or more series as in the Indenture provided.

         The Company has  executed and  delivered  to the Trustee one  indenture
supplemental to the Indenture (the "First  Supplemental  Indenture") dated as of
November 15, 1996.

         Pursuant to the terms of the Indenture,  the Company desires to provide
for the  establishment  of a new  series  of its  Notes to be known as its 6.72%
Senior Notes Due 1999 (herein called the "Senior Notes Due 1999"),  the form and
substance  of such  Senior  Notes  Due  1999  and  the  terms,  provisions,  and
conditions  thereof to be set forth as provided in the Indenture and this Second
Supplemental Indenture.

         All things necessary to make this Second Supplemental Indenture a valid
agreement of the Company,  and to make the Senior Notes Due 1999,  when executed
by the  Company  and  authenticated  and  delivered  by the  Trustee,  the valid
obligations of the Company, have been done.

         NOW, THEREFORE, THIS SECOND SUPPLEMENTAL INDENTURE WITNESSETH:

         For and in consideration of the premises and the purchase of the Senior
Notes Due 1999 by the Holders thereof,  and for the purpose of setting forth, as
provided in the  Indenture,  the form and substance of the Senior Notes Due 1999
and the terms,  provisions,  and conditions  thereof, it is mutually agreed, for
the equal and proportionate benefit of all Holders of the Senior Notes Due 1999,
as follows:

                                   ARTICLE ONE

                         GENERAL TERMS AND CONDITIONS OF
                            THE SENIOR NOTES DUE 1999

         SECTION 101. There shall be and is hereby  authorized a series of Notes
designated  the "6.72%  Senior Notes Due 1999,"  limited in aggregate  principal
amount to  $50,000,000,  which amount shall be as set forth in any Company Order
for the  authentication  and delivery of Senior Notes Due 1999. The Senior Notes
Due 1999 shall mature and the principal  shall be due and payable  together with
all accrued and unpaid interest thereon on April 1, 1999, and shall be issued in
the form of registered Senior Notes Due 1999 without coupons.
<PAGE>
         SECTION 102. The Senior Notes Due 1999 shall be issued in  certificated
form,  except  that the  Senior  Notes Due 1999 shall be issued  initially  as a
Global  Note to and  registered  in the name of Cede & Co.,  as  nominee  of The
Depository Trust Company, as Depositary  therefor.  Any Senior Notes Due 1999 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  Senior  Note Due 1999 in  Article  III
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 Note may be  exchanged in whole or in part for Senior
Notes Due 1999  registered,  and any transfer of such Global Note 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 Senior Notes Due 1999 will be payable,
the transfer of Senior Notes Due 1999 will be  registrable  and Senior Notes Due
1999 will be exchangeable for Senior Notes Due 1999 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 Senior Note Due 1999 will bear  interest at the rate
of 6.72% per annum from April 10, 1997 until the principal  thereof  becomes due
and  payable,  and on any overdue  principal  and (to the extent that payment of
such interest is enforceable under applicable law) on any overdue installment of
interest  at the same rate per annum,  payable on April 1 and  October 1 of each
year (each, an "Interest  Payment Date"),  commencing on October 1, 1997, to the
person in whose name such  Senior Note Due 1999 or any  predecessor  Senior Note
Due 1999 is registered, at the close of business on the March 15 or September 15
next preceding such Interest Payment Date; provided,  however, that the interest
payable at  maturity  will be payable to the person to whom  principal  shall be
payable.  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 Senior  Note Due
1999 (or one or more  Predecessor  Notes) 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  Senior  Notes Due 1999 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 Senior Notes Due
1999 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 April
10, 1997 to, but not including, the relevant payment date. In the event that any
date on which interest is payable on the Senior Notes Due 1999 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
                                        2
<PAGE>
such  delay),  except  that,  if such  Business  Day is in the  next  succeeding
calendar year, such payment shall be made on the immediately  preceding Business
Day,  in each case with the same  force and  effect as if made on such  date.  A
"Business Day" shall mean any day other than a day on which banking institutions
in The City of New York are authorized or obligated by law to close.

         SECTION 104. The Company,  at its option, may redeem all, or, from time
to time,  any part of the Senior Notes Due 1999,  upon notice as provided in the
Indenture at a redemption  price equal to the sum of (a) the principal amount of
the Senior  Notes Due 1999 (or portion  thereof)  being  redeemed  plus  accrued
interest  thereon to the redemption date and (b) the Make-Whole  Amount (if any)
with respect to the Senior Notes Due 1999 or portion thereof being redeemed.

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

         "Make-Whole Amount" means in connection with any optional redemption of
any Senior  Notes Due 1999,  the excess,  if any, of (i) the  aggregate  present
value  as of the date of such  redemption  of each  dollar  of  principal  being
redeemed and the amount of interest  (exclusive of interest  accrued to the date
of  redemption)  that would have been  payable in respect of each such dollar if
such redemption had not been made  determined by  discounting,  on a semi-annual
basis,  such principal and interest at the Reinvestment  Rate (determined on the
third  Business Day  preceding the date such notice of redemption is given) from
the  respective  dates on which  such  principal  and  interest  would have been
payable, if such redemption had not been made, over (ii) the aggregate principal
amount of the Senior Notes Due 1999 being redeemed.

         "Reinvestment  Rate" means 0.10% plus the arithmetic mean of the yields
under  the  respective  heading  "Week  Ending"  published  in the  most  recent
Statistical  Release under the caption  "Treasury  Constant  Maturities" for the
maturity  (rounded to the nearest month)  corresponding to the remaining life to
maturity, as of the payment date of the principal being redeemed. If no maturity
exactly  corresponds to such maturity,  yields for the two published  maturities
most closely  corresponding to such maturity shall be calculated pursuant to the
immediately  preceding  sentence and the Reinvestment Rate shall be interpolated
or extrapolated from such yields on a straight-line  basis,  rounding in each of
such relevant  periods to the nearest month.  For the purpose of calculating the
Reinvestment  Rate, the most recent  Statistical  Release published prior to the
date of determination of the Make-Whole Amount shall be used.

         "Statistical   Release"  means  the  statistical   release   designated
"H.15(519)"  or any  successor  publication  which is  published  weekly  by the
Federal  Reserve System and which  establishes  yields on actively traded United
States  government  securities  adjusted  to  constant  maturities,  or, if such
statistical  release is not published at the time of any determination under the
Indenture, then such other reasonably comparable index which shall be designated
by the Company.

         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
(if any).
                                        3
<PAGE>
         SECTION 105. The related series of Senior Note First Mortgage Bonds for
the Senior Notes Due 1999 is the Company's  First Mortgage  Bonds,  Senior Notes
Series B (the "Senior Note Series B Bonds").

         SECTION 106.  When the  obligation of the Company to make payments with
respect to the  principal  of, and  premium,  if any, and interest on all or any
part of the Senior Note Series B Bonds shall be  satisfied  or deemed  satisfied
pursuant to Section 403, Section 501, or Article 14 of the Indenture or pursuant
to Section 104 of this Second  Supplemental  Indenture,  the Trustee shall, upon
written  request of the Company and the receipt of the certificate of the Expert
described  in  Section  404(b) of the  Indenture  (if such  certificate  is then
required by Section  404(b) of the  Indenture),  deliver to the Company  without
charge  therefor  all of the Senior Note Series B Bonds so  satisfied  or deemed
satisfied,  together with such appropriate instruments of transfer or release as
may be  reasonably  requested  by the  Company.  All Senior  Note Series B Bonds
delivered to the Company in accordance  with this Section 106 shall be delivered
by the Company to the First Mortgage Trustee for cancellation.

         SECTION 107. The Senior Notes Due 1999 shall be defeasable  pursuant to
Section 1402 and Section 1403 of the Indenture.

                                   ARTICLE TWO

                              ADDITIONAL COVENANTS

         SECTION  201.  (a) From and after the  Release  Date and so long as any
Senior Notes Due 1999 are Outstanding,  the Company will not issue,  assume,  or
guarantee any Debt secured by any mortgage,  security interest,  pledge, or lien
(herein  referred to as a "mortgage")  of or upon any Operating  Property of the
Company,  whether owned at the date of the Indenture or thereafter acquired, and
will not  permit  to exist  any Debt  secured  by a  mortgage  on any  Operating
Property  created  on or prior to the  Release  Date,  without  in any such case
effectively  securing,  on the later to occur of the  issuance,  assumption,  or
guarantee of any such Debt or the Release Date, the Outstanding Senior Notes Due
1999 (together  with, if the Company shall so determine,  any other Note or Debt
of or guaranteed by the Company  ranking  senior to, or equally with, the Notes)
equally  and  ratably  with such Debt;  provided,  however,  that the  foregoing
restriction shall not apply to Debt secured by any of the following:

                           (1)      mortgages  on any  property  existing at the
                                    time of acquisition thereof;

                           (2)      mortgages  on  property  of  a   corporation
                                    existing  at the time  such  corporation  is
                                    merged   into  or   consolidated   with  the
                                    Company, or at the time of a sale, lease, or
                                    other  disposition of the properties of such
                                    corporation  or a  division  thereof  as  an
                                    entirety or  substantially as an entirety to
                                    the Company,  provided that such mortgage as
                                    a
                                        4
<PAGE>
                                    result of such merger, consolidation,  sale,
                                    lease, or other  disposition is not extended
                                    to property owned by the Company immediately
                                    prior thereto;

                           (3)      mortgages  on property to secure all or part
                                    of  the  cost  of  acquiring,  constructing,
                                    developing,   or  substantially   repairing,
                                    altering,  or improving such property, or to
                                    secure  indebtedness   incurred  to  provide
                                    funds   for   any   such   purpose   or  for
                                    reimbursement of funds  previously  expended
                                    for  any   such   purpose,   provided   such
                                    mortgages    are    created    or    assumed
                                    contemporaneously  with, or within  eighteen
                                    (18)  months  after,   such  acquisition  or
                                    completion of construction,  development, or
                                    substantial    repair,     alteration,    or
                                    improvement   or  within   six  (6)   months
                                    thereafter  pursuant  to  a  commitment  for
                                    financing arranged with a lender or investor
                                    within such eighteen (18) month period;

                           (4)      mortgages  in favor of the United  States of
                                    America  or  any  State   thereof,   or  any
                                    department,  agency, or  instrumentality  or
                                    political  subdivision  of the United States
                                    of America or any State thereof,  or for the
                                    benefit of holders of  securities  issued by
                                    any such entity, to secure any Debt incurred
                                    for the purpose of financing all or any part
                                    of  the  purchase   price  or  the  cost  of
                                    constructing,  developing,  or substantially
                                    repairing,   altering,   or  improving   the
                                    property subject to such mortgages; or

                           (5)      any extension,  renewal or  replacement  (or
                                    successive    extensions,    renewals,    or
                                    replacements),  in whole or in part,  of any
                                    mortgage   referred  to  in  the   foregoing
                                    clauses  (1) to  (4),  inclusive;  provided,
                                    however,  that the principal  amount of Debt
                                    secured thereby and not otherwise authorized
                                    by said clauses (1) to (4), inclusive, shall
                                    not  exceed  the  principal  amount of Debt,
                                    plus  any   premium   or  fee   payable   in
                                    connection with any such extension, renewal,
                                    or  replacement,  so  secured at the time of
                                    such extension, renewal, or replacement.

                                    (b)   Notwithstanding   the   provisions  of
Section 201(a),  from and after the Release Date and so long as any Senior Notes
Due 1999 are Outstanding,  the Company may issue,  assume, or guarantee Debt, or
permit to exist Debt,  secured by mortgages  which would otherwise be subject to
the  restrictions  of Section 201(a) up to an aggregate  principal  amount that,
together with the principal  amount of all other Debt of the Company  secured by
mortgages (other than mortgages permitted by Section 201(a) that would otherwise
be  subject  to the  foregoing  restrictions)  and the  Value  of all  Sale  and
Lease-Back  Transactions  in  existence  at such time  (other  than any Sale and
Lease-Back Transaction that, if such Sale and Lease-Back Transaction had been
                                        5

<PAGE>
a mortgage,  would have been  permitted by Section  201(a),  other than Sale and
Lease-Back Transactions permitted by Section 202 because the commitment by or on
behalf of the  purchaser  was obtained no later than  eighteen (18) months after
the later of events described in (i) or (ii) of Section 202, and other than Sale
and Lease-Back Transactions as to which application of amounts have been made in
accordance  with  clause (z) of Section  202),  does not at the time  exceed the
greater of ten percent  (10%) of Net  Tangible  Assets or ten  percent  (10%) of
Capitalization.

                                    (c) If at any time the Company  shall issue,
assume,  or guarantee  any Debt  secured by any  mortgage and if Section  201(a)
requires  that the  Outstanding  Senior  Notes Due 1999 be secured  equally  and
ratably with such Debt, the Company will promptly execute,  at its expense,  any
instruments  necessary to so equally and ratably secure the  Outstanding  Senior
Notes Due 1999 and deliver the same to the Trustee along with:

                           (1)      An  Officers'  Certificate  stating that the
                                    covenant of the Company contained in Section
                                    201(a) has been complied with; and

                           (2)      An Opinion of Counsel to the effect that the
                                    Company  has  complied   with  the  covenant
                                    contained  in Section  201(a),  and that any
                                    instrument  executed  by the  Company in the
                                    performance  of such covenant  complies with
                                    the requirements of such covenant.

                  In  the  event  that  the  Company  shall   hereafter   secure
Outstanding  Senior Notes Due 1999 equally and ratably with any other obligation
or  indebtedness  (including  other Notes)  pursuant to the  provisions  of this
Section  201,  the Trustee is hereby  authorized  to enter into an  indenture or
agreement supplemental hereto and to take such action, if any, as it may, in its
sole and absolute discretion, deem advisable to enable it to enforce effectively
the  rights of the  Holders of  Outstanding  Senior  Notes Due 1999 so  secured,
equally and ratably with such other obligation or indebtedness.

         SECTION 202.  From and after the Release Date and so long as any Senior
Notes Due 1999 are  outstanding,  the  Company  will not enter into any Sale and
Lease-Back  Transaction  with  respect to any  Operating  Property  and will not
permit to remain in effect any Sale and Lease-Back  Transaction  entered into on
or prior to the Release Date with respect to any  Operating  Property if, in any
case,  the  commitment  by or on behalf of the purchaser is or was obtained more
than  eighteen  (18)  months  after  the  later  of (i)  the  completion  of the
acquisition, construction, or development of such Operating Property or (ii) the
placing in operation of such Operating Property or of such Operating Property as
constructed,  developed, or substantially repaired, altered, or improved, unless
(x) the Company would be entitled  pursuant to Section 201(a) to issue,  assume,
or  guarantee  Debt  secured by a mortgage on such  Operating  Property  without
equally and ratably  securing the Senior Notes Due 1999 or (y) the Company would
be entitled  pursuant to Section  201(b),  after giving  effect to such Sale and
Lease-Back  Transaction,  to incur $1.00 of additional Debt secured by mortgages
(other than  mortgages  permitted  by Section  201(a)) or (z) the Company  shall
apply or cause to be applied, in the case of a sale or transfer for cash,
                                        6
<PAGE>
an amount equal to the net  proceeds  thereof (but not in excess of the net book
value of such  Operating  Property at the date of such sale or transfer) and, in
the case of a sale or transfer  otherwise  than for cash, an amount equal to the
fair value (as  determined by the Board of Directors) of the Operating  Property
so leased,  to the  retirement,  within one hundred  eighty (180) days after the
later to occur of the effective date of such Sale and Lease-Back  Transaction or
the Release  Date, of Notes or other Debt of the Company  ranking  senior to, or
equally  with,  the  Senior  Notes Due 1999;  provided,  however,  that any such
retirement of Notes shall be in accordance  with the terms and provisions of the
Indenture  and the Notes;  provided,  further,  that the amount to be applied to
such  retirement  of Notes or other Debt shall be reduced by an amount  equal to
the sum of (a) an amount  equal to the  redemption  price with  respect to Notes
delivered  within such one hundred  eighty  (180)-day  period to the Trustee for
retirement and  cancellation and (b) the principal  amount,  plus any premium or
fee paid in connection with any redemption in accordance with the terms of other
Debt voluntarily retired by the Company within such one hundred eighty (180)-day
period, excluding in each case retirements pursuant to mandatory sinking fund or
prepayment provisions and payments at maturity.

         SECTION 203. Definitions

         For purposes of Section 201 and Section 202 of this Second Supplemental
Indenture, the following terms shall have the following meanings:

         "Capitalization"  means the total of all the following  items appearing
on,  or  included  in,  the  consolidated  balance  sheet  of the  Company:  (i)
liabilities for indebtedness maturing more than twelve (12) months from the date
of  determination;  and (ii) common stock,  preferred stock,  premium on capital
stock,  capital surplus,  capital in excess of par value, and retained  earnings
(however the  foregoing  may be  designated),  less, to the extent not otherwise
deducted,  the  cost of  shares  of  capital  stock of the  Company  held in its
treasury.

         Subject  to  the  foregoing,  Capitalization  shall  be  determined  in
accordance  with  generally   accepted   accounting   principles  and  practices
applicable  to the type of business in which the Company is engaged and that are
approved by independent  accountants  regularly retained by the Company, and may
be  determined as of a date not more than (sixty) 60 days prior to the happening
of an event for which such determination is being made.

         The term "Debt" means any outstanding debt for money borrowed evidenced
by notes, debentures, bonds, or other securities.

         The term "Net  Tangible  Assets" means the amount shown as total assets
on the  consolidated  balance  sheet of the  Company,  less the  following:  (i)
intangible assets  including,  but without  limitation,  such items as goodwill,
trademarks,  trade names, patents, and unamortized debt discount and expense and
other  regulatory  assets  carried  as an  asset on the  Company's  consolidated
balance sheet; and (ii) appropriate adjustments,  if any, on account of minority
interests.
                                        7
<PAGE>
         Net Tangible  Assets shall be determined in accordance  with  generally
accepted accounting  principles and practices applicable to the type of business
in which  the  Company  is  engaged  and that are  approved  by the  independent
accountants  regularly  retained by the Company,  and may be  determined as of a
date not more than (sixty) 60 days prior to the happening of the event for which
such determination is being made.

         The term  "Operating  Property" means (i) any interest in real property
owned by the Company and (ii) any asset owned by the Company that is depreciable
in accordance with generally accepted accounting principles.

         The term "Sale and Lease-Back  Transaction"  means any arrangement with
any person  providing for the leasing to the Company of any  Operating  Property
(except for temporary leases for a term,  including any renewal thereof,  of not
more than forty-eight (48) months),  which Operating  Property has been or is to
be sold or transferred by the Company to such person.

         The  term  "Value"  means,  with  respect  to  a  Sale  and  Lease-Back
Transaction,  as of any particular  time, the amount equal to the greater of (1)
the net proceeds to the Company from the sale or transfer of the property leased
pursuant to such Sale and  Lease-Back  Transaction  or (2) the net book value of
such property,  as determined in accordance with generally  accepted  accounting
principles by the Company at the time of entering into such Sale and  Lease-Back
Transaction,  in either case  multiplied  by a fraction,  the numerator of which
shall be equal to the number of full years of the term of the lease that is part
of such Sale and Lease-Back  Transaction  remaining at the time of determination
and the  denominator of which shall be equal to the number of full years of such
term, without regard, in any case, to any renewal or extension options contained
in such lease.

                                  ARTICLE THREE

                          FORM OF SENIOR NOTE DUE 1999

         SECTION 301. The Senior Notes Due 1999 and the Trustee's certificate of
authentication to be endorsed are to be substantially in the following forms:

Form of Face of Note.

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
                                        8
<PAGE>
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

                           6.72% Senior Notes Due 1999



No.                                                                  $50,000,000
    -----                                                       CUSIP No.
                                                                         -------

      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 Fifty  Million  Dollars on April 1, 1999,  and to pay interest
thereon from April 10, 1997 or from the most recent  Interest  Payment Date with
respect to which interest has been paid or duly provided for,  semi-annually  on
April 1 and October 1 in each year,  commencing  October 1, 1997, at the rate of
6.72% per  annum,  until the  principal  hereof  is paid or made  available  for
payment,  provided that any principal  and premium,  and any such  instalment of
interest,  which is overdue  shall bear  interest at the rate of 6.72% per annum
(to the extent that the payment of such interest shall be legally  enforceable),
from the dates such  amounts are due until they are paid or made  available  for
payment,  and such interest shall be payable on demand. 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 Note (or
one or more  Predecessor  Notes) is  registered  at the close of business on the
Regular Record Date for such interest,  which shall be the March 15 or September
15 (whether or not a Business  Day),  as the case may be,  next  preceding  such
Interest Payment Date. 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 Note (or one or more
Predecessor  Notes) 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 Notes 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 Notes 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 such  interest on
this Note will be made at the  office or agency of the  Company  maintained  for
that purpose in The City of New
                                        9
<PAGE>
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 Note Register.

      Reference is hereby made to the further  provisions of this Note set forth
below,  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 Note 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 Note.

      This Note is one of a duly  authorized  issue of securities of the Company
(herein called the "Notes"), issued and to be issued in one or more series under
an  Indenture,  dated as of November  15, 1996 (herein  called the  "Indenture",
which term shall have the meaning  assigned to it in such  instrument),  between
the Company and The Bank of New York, 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 Notes and of the terms upon which the Notes are,
and are to be,  authenticated  and  delivered.  This  Note is one of the  series
designated  on the  face  hereof,  limited  in  aggregate  principal  amount  to
$50,000,000.

      Prior to the  Release  Date (as  hereinafter  defined),  this Note will be
secured by First Mortgage Bonds, Senior Note Series B (the "Senior Note Series B
Bonds")  delivered  by the Company to the Trustee for the benefit of the Holders
of the series of Notes of which this Note
                                       10
<PAGE>
is a part,  issued  under the  Mortgage  and Deed of Trust,  dated as of July 1,
1946,  from the  Company  to The Bank of New York,  as  successor  trustee  (the
"Mortgage  Trustee"),  as  supplemented  and  amended  (the  "First  Mortgage").
Reference is made to the First Mortgage for a description of property  mortgaged
and pledged, the nature and extent of the security, the rights of the holders of
the first mortgage bonds under the First Mortgage and of the Mortgage Trustee in
respect thereof, the duties and immunities of the Mortgage Trustee and the terms
and  conditions  upon which the Senior  Note  Series B Bonds are secured and the
circumstances under which additional first mortgage bonds may be issued.

      FROM AND AFTER SUCH TIME AS ALL FIRST  MORTGAGE  BONDS  (OTHER THAN SENIOR
NOTE FIRST MORTGAGE  BONDS,  AS SUCH TERM IS DEFINED IN THE INDENTURE) HAVE BEEN
RETIRED  THROUGH  PAYMENT,  REDEMPTION  OR  OTHERWISE  AT,  BEFORE  OR AFTER THE
MATURITY  THEREOF (THE "RELEASE  DATE"),  THE SENIOR NOTE FIRST  MORTGAGE  BONDS
SHALL CEASE TO SECURE THE NOTES IN ANY MANNER.

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

      If notice has been given as  provided in the  Indenture  and funds for the
redemption of any Notes (or any portion  thereof)  called for  redemption  shall
have been made available on the redemption date referred to in such notice, such
Notes (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 Notes will be to receive payment of the Redemption Price.

      Notice of any optional  redemption of Notes of this series (or any portion
thereof) will be given to Holders at their  addresses,  as shown in the security
register  for such Notes,  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 and the principal amount of the Notes held by such
Holder to be  redeemed.  If less than all of the Notes 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 Notes to be redeemed in whole or in
part.

      As used herein:

         "Make-Whole  Amount" means, in connection with any optional  redemption
      of any Notes, the excess, if any, of (i) the aggregate present value as of
      the date of such redemption of each dollar of principal being redeemed and
      the  amount of  interest  (exclusive  of  interest  accrued to the date of
      redemption) that would have been payable in respect of each such dollar if
      such  redemption  had not  been  made,  determined  by  discounting,  on a
      semi-annual basis, such
                                       11
<PAGE>
      principal and interest at the  Reinvestment  Rate (determined on the third
      Business Day  preceding  the date such notice of redemption is given) from
      the respective  dates on which such principal and interest would have been
      payable  if such  redemption  had not been made,  over (ii) the  aggregate
      principal amount of the Notes being redeemed.

         "Reinvestment  Rate" means 0.10% plus the arithmetic mean of the yields
      under the  respective  heading "Week Ending"  published in the most recent
      Statistical  Release under the caption "Treasury Constant  Maturities" for
      the maturity (rounded to the nearest month) corresponding to the remaining
      life to maturity,  as of the payment date of the principal being redeemed.
      If no maturity  exactly  corresponds to such maturity,  yields for the two
      published maturities most closely  corresponding to such maturity shall be
      calculated  pursuant  to  the  immediately   preceding  sentence  and  the
      Reinvestment  Rate shall be interpolated or extrapolated  from such yields
      on a straight-line basis, rounding in each of such relevant periods to the
      nearest month. For the purpose of calculating the  Reinvestment  Rate, the
      most  recent   Statistical   Release   published  prior  to  the  date  of
      determination of the Make-Whole Amount shall be used.

         "Statistical   Release"  means  the  statistical   release   designated
      "H.15(519)" or any successor  publication which is published weekly by the
      Federal  Reserve System and which  establishes  yields on actively  traded
      United States government  securities adjusted to constant maturities,  or,
      if  such  statistical  release  is  not  published  at  the  time  of  any
      determination under the Indenture,  then such other reasonably  comparable
      index which shall be designated by the Company.

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

      In the event of  redemption of this Note in part only, a new Note or Notes
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 this Note or certain restrictive covenants and Events of Default
with respect to this Note, in each case upon compliance with certain  conditions
set forth in the Indenture.

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

      If an Event of Default  with  respect to Notes of this series  shall occur
and be continuing, the principal of the Notes may be declared due and payable in
the  manner  and with the  effect  provided  in the  Indenture  and,  upon  such
declaration, the Trustee can demand the acceleration of the payment of principal
of the Senior Note Series B Bonds as provided in the Indenture.
                                       12
<PAGE>
      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 Notes of each series to be affected
under the  Indenture at any time by the Company and the Trustee with the consent
of the  Holders  of a  majority  in  principal  amount  of the Notes 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 Notes of each series at the time Outstanding, on behalf of the Holders of
all Notes 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 Note shall
be conclusive  and binding upon such Holder and upon all future  Holders of this
Note and of any Note  issued  upon the  registration  of  transfer  hereof or in
exchange therefor or in lieu hereof,  whether or not notation of such consent or
waiver is made upon this Note.

      As provided in and subject to the provisions of the Indenture,  the Holder
of this Note 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
Notes of this series,  the Holders of not less than 25% in  principal  amount of
the Notes 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 Notes 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 Note 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 Note 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 Note 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 Note is registrable in the Note Register,  upon
surrender of this Note 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 Note are payable,  duly endorsed by, or accompanied by a written instrument
of transfer in form  satisfactory  to the  Company and the Note  Registrar  duly
executed by, the Holder hereof or his attorney duly  authorized in writing,  and
thereupon one or more new Notes 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 Notes 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,
Notes of this series are exchangeable  for a like aggregate  principal amount of
Notes of this series and of like tenor of a different  authorized  denomination,
as requested by the Holder surrendering the same.
                                       13
<PAGE>
      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 Note 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  Note is  registered  as the  owner  hereof  for all
purposes,  whether or not this Note 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 Note 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 Notes of the series designated  therein referred to in the
within-mentioned Indenture.

   Dated:
                                                           THE BANK OF NEW YORK,
                                                                      As Trustee


                                                 By
                                                    ----------------------------
                                                            Authorized Signatory





                                  ARTICLE FOUR

                     ORIGINAL ISSUE OF SENIOR NOTES DUE 1999

         SECTION 401. Senior Notes Due 1999 in the aggregate principal amount of
$50,000,000,  may, upon execution of this Second 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 to or upon the written order of the Company,  signed by its Chairman,
its  President,  or  any  Vice  President  and  its  Treasurer  or an  Assistant
Treasurer, without any further action by the Company.
                                       14
<PAGE>
                                  ARTICLE FIVE

                           PAYING AGENT AND REGISTRAR

         SECTION  501.  The Bank of New York will be the  Paying  Agent and Note
Registrar for the Senior Notes Due 1999.

                                   ARTICLE SIX

                                SUNDRY PROVISIONS

         SECTION  601.  Except as  otherwise  expressly  provided in this Second
Supplemental  Indenture  or in the form of Senior  Notes  Due 1999 or  otherwise
clearly  required by the context hereof or thereof,  all terms used herein or in
said form of Senior Notes Due 1999 that are defined in the Indenture  shall have
the several meanings respectively assigned to them thereby.

         SECTION 602. The Indenture, as supplemented by this Second Supplemental
Indenture,  is  in  all  respects  ratified  and  confirmed,   and  this  Second
Supplemental  Indenture  shall be deemed part of the Indenture in the manner and
to the extent herein and therein provided.

         SECTION 603. 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 Second 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 Seven of the Indenture shall apply to and form part of this
Second 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
Second 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.
                                       15
<PAGE>
         IN  WITNESS  WHEREOF,  the  parties  hereto  have  caused  this  Second
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: Nancy E. Felker
                                           ---------------------------------
                                            Nancy E. Felker
                                            Treasurer

Attest:


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

                                        THE BANK OF NEW YORK, as Trustee



                                        By: Walter N. Gitlin
                                           ---------------------------------
                                            Walter N. Gitlin
                                            Vice President

Attest:

Stephen J. Giurlando
- ---------------------------------
Stephen J. Giurlando
Assistant Vice President
                                       16
<PAGE>
STATE OF ARIZONA   )
                   ) ss:
COUNTY OF MARICOPA )

         On the 9th day of April,  1997,  before  me  personally  came  Nancy E.
Felker, 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.

                                        
                                               Maria R. Marrs
                                 -----------------------------------------------
                                               NOTARY PUBLIC

My Commission Expires:

July 21, 1998
- ------------------------
                                       17
<PAGE>
STATE OF NEW YORK            )
                             ) ss:
COUNTY OF NEW YORK           )

         On the 8th day of April,  1997,  before me  personally  came  Walter N.
Gitlin, to me known, who, being by me duly sworn,  did depose and say that he is
the Vice President of The Bank of New York, one of the corporations described in
and which  executed  the  foregoing  instrument;  that he 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 signed his name thereto by like authority.


                                               William J. Cassels
                                 -----------------------------------------------
                                                  NOTARY PUBLIC

My Commission Expires:

     May 16, 1998
- ------------------------
                                       18

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

                           6.72% Senior Notes Due 1999



No. B-1                                                              $50,000,000

                                                            CUSIP No. 04055P AA8
                                                                      ----------


      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 Fifty  Million  Dollars on April 1, 1999,  and to pay interest
thereon from April 10, 1997 or from the most recent  Interest  Payment Date with
respect to which interest has been paid or duly provided for,  semi-annually  on
April 1 and October 1 in each year,  commencing  October 1, 1997, at the rate of
6.72% per  annum,  until the  principal  hereof  is paid or made  available  for
payment,  provided that any principal  and premium,  and any such  instalment of
interest,  which is overdue  shall bear  interest at the rate of 6.72% per annum
(to the extent that the payment of such interest shall be legally  enforceable),
from the dates such  amounts are due until they are paid or made  available  for
payment,  and such interest shall be payable on demand. 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 Note (or
one or more  Predecessor  Notes) is  registered  at the close of business on the
Regular Record Date for such interest,  which shall be the March 15 or September
15 (whether or not a Business  Day),  as the case may be,  next  preceding  such
Interest Payment Date. 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 Note (or one or more
Predecessor  Notes) 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 Notes 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 Notes 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 such  interest on
this Note 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
<PAGE>
by check  mailed to the address of the Person  entitled  thereto as such address
shall appear in the Note Register.

      Reference is hereby made to the further  provisions of this Note set forth
below,  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 Note shall
not be entitled to any benefit under the Indenture or be valid or obligatory for
any purpose.
                                        2
<PAGE>
      IN WITNESS  WHEREOF,  the Company has caused  this  instrument  to be duly
executed under its corporate seal.

                                             ARIZONA PUBLIC SERVICE COMPANY


                                        By  George A. Schreiber, Jr.
                                          -------------------------------------
                                           Executive Vice President and Chief
                                           Financial Officer

Attest:

Nancy c. Loftin
- --------------------------------------
Vice President, Chief Legal Counsel
and Secretary
                                        3
<PAGE>
      This Note is one of a duly  authorized  issue of securities of the Company
(herein called the "Notes"), issued and to be issued in one or more series under
an  Indenture,  dated as of November  15, 1996 (herein  called the  "Indenture",
which term shall have the meaning  assigned to it in such  instrument),  between
the Company and The Bank of New York, 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 Notes and of the terms upon which the Notes are,
and are to be,  authenticated  and  delivered.  This  Note is one of the  series
designated  on the  face  hereof,  limited  in  aggregate  principal  amount  to
$50,000,000.

      Prior to the  Release  Date (as  hereinafter  defined),  this Note will be
secured by First Mortgage Bonds, Senior Note Series B (the "Senior Note Series B
Bonds")  delivered  by the Company to the Trustee for the benefit of the Holders
of the series of Notes of which this Note is a part,  issued  under the Mortgage
and Deed of Trust, dated as of July 1, 1946, from the Company to The Bank of New
York, as successor trustee (the "Mortgage Trustee"), as supplemented and amended
(the  "First  Mortgage").  Reference  is  made  to  the  First  Mortgage  for  a
description  of property  mortgaged  and  pledged,  the nature and extent of the
security,  the rights of the holders of the first mortgage bonds under the First
Mortgage  and of the  Mortgage  Trustee  in  respect  thereof,  the  duties  and
immunities of the Mortgage  Trustee and the terms and conditions  upon which the
Senior  Note  Series B Bonds  are  secured  and the  circumstances  under  which
additional first mortgage bonds may be issued.

      FROM AND AFTER SUCH TIME AS ALL FIRST  MORTGAGE  BONDS  (OTHER THAN SENIOR
NOTE FIRST MORTGAGE  BONDS,  AS SUCH TERM IS DEFINED IN THE INDENTURE) HAVE BEEN
RETIRED  THROUGH  PAYMENT,  REDEMPTION  OR  OTHERWISE  AT,  BEFORE  OR AFTER THE
MATURITY  THEREOF (THE "RELEASE  DATE"),  THE SENIOR NOTE FIRST  MORTGAGE  BONDS
SHALL CEASE TO SECURE THE NOTES IN ANY MANNER.

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

      If notice has been given as  provided in the  Indenture  and funds for the
redemption of any Notes (or any portion  thereof)  called for  redemption  shall
have been made available on the redemption date referred to in such notice, such
Notes (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 Notes will be to receive payment of the Redemption Price.

      Notice of any optional  redemption of Notes of this series (or any portion
thereof) will be given to Holders at their  addresses,  as shown in the security
register  for such Notes,  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 and the principal amount of the Notes held by such
Holder to be  redeemed.  If less than all of the Notes 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 Notes to be redeemed in whole or in
part.
                                        4
<PAGE>
      As used herein:

         "Make-Whole  Amount" means, in connection with any optional  redemption
      of any Notes, the excess, if any, of (i) the aggregate present value as of
      the date of such redemption of each dollar of principal being redeemed and
      the  amount of  interest  (exclusive  of  interest  accrued to the date of
      redemption) that would have been payable in respect of each such dollar if
      such  redemption  had not  been  made,  determined  by  discounting,  on a
      semi-annual  basis,  such principal and interest at the Reinvestment  Rate
      (determined  on the third  Business Day  preceding the date such notice of
      redemption is given) from the respective dates on which such principal and
      interest  would have been  payable if such  redemption  had not been made,
      over (ii) the aggregate principal amount of the Notes being redeemed.

         "Reinvestment  Rate" means 0.10% plus the arithmetic mean of the yields
      under the  respective  heading "Week Ending"  published in the most recent
      Statistical  Release under the caption "Treasury Constant  Maturities" for
      the  maturity  (rounded  to  the  nearest  month)  corresponding   to  the
      remaining life to maturity, as of the payment date of the principal  being
      redeemed. If no maturity exactly corresponds to such maturity,  yields for
      the two published  maturities most closely  corresponding to such maturity
      shall be calculated pursuant to the immediately preceding sentence and the
      Reinvestment  Rate shall be interpolated or extrapolated  from such yields
      on a straight-line basis, rounding in each of such relevant periods to the
      nearest month. For the purpose of calculating the  Reinvestment  Rate, the
      most  recent   Statistical   Release   published  prior  to  the  date  of
      determination of the Make-Whole Amount shall be used.

         "Statistical   Release"  means  the  statistical   release   designated
      "H.15(519)" or any successor  publication which is published weekly by the
      Federal  Reserve System and which  establishes  yields on actively  traded
      United States government  securities adjusted to constant maturities,  or,
      if  such  statistical  release  is  not  published  at  the  time  of  any
      determination under the Indenture,  then such other reasonably  comparable
      index which shall be designated by the Company.

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

      In the event of  redemption of this Note in part only, a new Note or Notes
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 this Note or certain restrictive covenants and Events of Default
with respect to this Note, in each case upon compliance with certain  conditions
set forth in the Indenture.

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

      If an Event of Default  with  respect to Notes of this series  shall occur
and be continuing, the principal of the Notes may be declared due and payable in
the  manner  and with the  effect  provided  in the  Indenture  and,  upon  such
declaration, the Trustee can demand the acceleration of the payment of principal
of the Senior Note Series B Bonds as provided in the Indenture.
                                        5
<PAGE>
      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 Notes of each series to be affected
under the  Indenture at any time by the Company and the Trustee with the consent
of the  Holders  of a  majority  in  principal  amount  of the Notes 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 Notes of each series at the time Outstanding, on behalf of the Holders of
all Notes 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 Note shall
be conclusive  and binding upon such Holder and upon all future  Holders of this
Note and of any Note  issued  upon the  registration  of  transfer  hereof or in
exchange therefor or in lieu hereof,  whether or not notation of such consent or
waiver is made upon this Note.

      As provided in and subject to the provisions of the Indenture,  the Holder
of this Note 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
Notes of this series,  the Holders of not less than 25% in  principal  amount of
the Notes 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 Notes 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 Note 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 Note 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 Note 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 Note is registrable in the Note Register,  upon
surrender of this Note 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 Note are payable,  duly endorsed by, or accompanied by a written instrument
of transfer in form  satisfactory  to the  Company and the Note  Registrar  duly
executed by, the Holder hereof or his attorney duly  authorized in writing,  and
thereupon one or more new Notes 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 Notes 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,
Notes of this series are exchangeable  for a like aggregate  principal amount of
Notes of this series and of like tenor of a different  authorized  denomination,
as requested by the Holder surrendering the same.
                                        6
<PAGE>
      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 Note 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  Note is  registered  as the  owner  hereof  for all
purposes,  whether or not this Note 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 Note which are defined in the Indenture  shall have
the meanings assigned to them in the Indenture.




                          CERTIFICATE OF AUTHENTICATION


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

         Dated:  April 10, 1997

                                                           THE BANK OF NEW YORK,
                                                                      As Trustee


                                                By     Walter N. Gitlin
                                                  ------------------------------
                                                            Authorized Signatory
                                        7

                                  Exhibit 12.2




                         ARIZONA PUBLIC SERVICE COMPANY
                    COMPUTATION OF EARNINGS TO FIXED CHARGES
                             (Thousands of Dollars)
<TABLE>
<CAPTION>
                                                           Twelve Months Ended
                                        -----------------------------------------------------------
                                                               December 31,
                                        -----------------------------------------------------------


                                            1996        1995        1994        1993        1992
                                            ----        ----        ----        ----        ----
<S>                                       <C>         <C>         <C>         <C>         <C>     
Earnings:
     Net Income......................     $243,471    $239,570    $243,486    $250,386    $246,805
     Income taxes (1)................      132,961     141,267     177,244     188,907     181,355
     Fixed Charges...................      203,855     214,768     213,581     220,590     246,246
                                          --------    --------    --------    --------    --------
       Total.........................     $580,287    $595,605    $634,311    $659,883    $674,406
                                          ========    ========    ========    ========    ========

Fixed Charges:
     Interest expense................     $158,287    $168,175    $166,045    $171,272    $190,746
     Amortization of debt discount,
       premium and expense...........        8,176       8,622       8,854       9,203       8,000
     Estimated interest portion of
       annual rents (2)..............       37,392      37,971      38,682      40,115      47,500
                                          --------    --------    --------    --------    --------
       Total.........................     $203,855    $214,768    $213,581    $220,590    $246,246
                                          ========    ========    ========    ========    ========

Ratio of Earnings to Fixed Charges
     (rounded down)..................         2.84        2.77        2.96        2.99        2.73
                                          ========    ========    ========    ========    ========

(1)  Income Taxes:
     Charged to operations...........     $178,513    $178,865    $168,202    $168,056    $164,620
     Charged (credited) to other
       accounts......................      (45,552)    (37,598)      9,042      20,851      16,735
                                          --------    --------    --------    --------    --------
       Total.........................     $132,961    $141,267    $177,244    $188,907    $181,355
                                          ========    ========    ========    ========    ========

(2)  Estimated interest portion of
     Unit 2 lease payments included
     in estimated interest portion of
     annual rentals..................    $  35,083   $  35,422   $  35,710   $  37,407   $  43,581
                                         =========   =========   =========   =========   =========
</TABLE>


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