Exhibit 1.1


                         ARIZONA PUBLIC SERVICE COMPANY

                              First Mortgage Bonds


                             UNDERWRITING AGREEMENT
                             ----------------------

                   

Dear Sir or Madam:

     1.  Introduction.  Arizona Public Service Company,  an Arizona  corporation
(the "Company"), proposes to issue and sell from time to time up to $150,000,000
in  aggregate  principal  amount  of its  First  Mortgage  Bonds  (the  "Bonds")
registered  under the registration  statements  referred to in Section 2(a). The
Bonds will be issued  under its  Mortgage  and Deed of Trust dated as of July 1,
1946, to The Bank of New York, as successor Trustee, as amended and supplemented
by fifty-three indentures supplemental thereto (the "Mortgage"),  and as further
amended  and  supplemented  by one or more  additional  Supplemental  Indentures
relating to the Bonds (the  "Supplemental  Indentures") (the Mortgage as amended
and supplemented by such  Supplemental  Indentures  being sometimes  hereinafter
referred to as the "Indenture"). The Bonds will be issued in one or more series,
which series may vary as to interest rates,  maturities,  redemption provisions,
selling prices, and other terms, with all such terms for any particular issue of
the Bonds being determined at the time of sale.  Particular  issues of the Bonds
may be sold from time to time to one or more of the firms to whom this Agreement
is addressed, and to such other purchasers as the Company shall designate and as
shall  agree  in  writing  to  comply  with the  terms  and  conditions  of this
Agreement, for resale in accordance with the terms of offering determined at the
time of sale. The Bonds involved in any such offering are  hereinafter  referred
to as the  "Purchased  Bonds," the parties  that agree to purchase  the same are
hereinafter  referred to as the  "Underwriters" of such Purchased Bonds, and the
representative or  representatives  of the Underwriters,  if any, specified in a
Terms  Agreement  referred  to in Section 3 are  hereinafter  referred to as the
"Representatives."

     2.  Representations  and Warranties of the Company. In connection with each
offering of the Purchased  Bonds,  the Company  represents  and warrants to, and
agrees with, the several Underwriters that:

              (a)  A   registration   statement  (No.   33-61228)   relating  to
         $100,000,000  of the Bonds,  a registration  statement  (No.  33-55473)
         relating to $25,000,000 of the Bonds or unsecured debentures, notes, or
         other evidences of indebtedness  (the  "Securities") and a registration
         statement  (No.  ______)  relating  to  $25,000,000  of  the  Bonds  or
         Securities  (including  a combined  prospectus  relating  to all of the
         Bonds and  Securities)  were filed  with the  Securities  and  Exchange
         Commission  (the   "Commission")  and  have  become   effective.   Such
         registration  statements,  as each is  amended at the time of the Terms
         Agreement referred to in Section 3 relating to the Purchased Bonds, are
         hereinafter  referred  to as the "First  Registration  Statement,"  the
         "Second   Registration   Statement,"   and  the   "Third   Registration
         Statement," respectively,  and are hereinafter referred to collectively
         as the "Registration  Statements," and such prospectus, as supplemented
         as  contemplated  by  Section 3 to reflect  the terms of the  Purchased
         Bonds  and  terms  of  offering   thereof,   including   all   material
         incorporated by reference  therein,  is hereinafter  referred to as the
         "Prospectus."

              (b)  Each  part of the  Registration  Statements  relating  to the
         Bonds,  when such part became  effective,  conformed in all respects to
         the  requirements of the Securities Act of 1933 (the "Act"),  the Trust
         Indenture  Act of 1939 (the  "Trust  Indenture  Act") and the rules and
         regulations (the "Rules and Regulations") of the Commission and did not
         include any untrue  statement  of a material  fact or omit to state any
         material  fact  required to be stated  therein or necessary to make the
         statements  therein not misleading,  and on the date of each Prospectus
         Supplement  referred to in Section 3, the  Registration  Statements and
         the Prospectus will conform in all respects to the  requirements of the
         Act, the Trust Indenture Act and the Rules and Regulations, and at such
         date none of such  documents  will  include any untrue  statement  of a
         material  fact or omit to state any material fact required to be stated
         therein or necessary  to make the  statements  therein not  misleading;
         provided,  however, that the foregoing does not apply to (a) statements
         in or omissions from any such documents based upon written  information
         furnished  to the  Company  by any  Underwriter  specifically  for  use
         therein or (b) that part of the  Registration  Statements that consists
         of the Statement of Eligibility and Qualification  (Form T-1) under the
         Trust  Indenture  Act of 1939 of The  Bank of New  York,  as  successor
         Trustee under the Mortgage.

              (c) An order of the Arizona Corporation Commission shall have been
         granted  authorizing  the  execution  and delivery of the  Supplemental
         Indenture  relating to the Purchased Bonds and the issuance and sale of
         the  Purchased  Bonds on the terms  and  conditions  herein  and in the
         Prospectus and the Terms Agreement referred to in Section 3 relating to
         the  Purchased  Bonds,  and the  approval or consent of no other public
         body or authority is  necessary to the  execution  and delivery of such
         Supplemental  Indenture or the validity of the issuance and sale of the
         Purchased  Bonds,  except as may be required under state  securities or
         blue sky laws.

              (d) Except for property specifically excepted from the lien of the
         Indenture or released  therefrom in accordance  with the terms thereof,
         the Company  has good and  marketable  title in fee simple,  except for
         items described in (A), (B), and (C) below, to all of the real property
         purported  in the  Indenture  to be so held,  good and valid  leasehold
         interests in all properties purported in the Indenture to be held under
         lease,  and good and valid title to all other  properties  described in
         the Indenture as subject to the lien thereof (which  property  excludes
         (i)  the  combined  cycle  plant  referred  to in  Note 4 of  Notes  to
         Financial  Statements in the Company's  Form 10-K Report for the fiscal
         year ended December 31, 1994 (the "1994 Form 10-K Report") incorporated
         by reference in the Registration  Statements but includes the Company's
         leasehold and related  interests in that plant and (ii) certain  leased
         interests  in  Unit 2 of the  Palo  Verde  Nuclear  Generating  Station
         referred to in Note 7 of Notes to Financial Statements in the 1994 Form
         10-K Report),  except that the transmission  and distribution  lines of
         the  Company,  other  than  those  located  on land owned in fee by the
         Company,  and the property described in Section 15 of Article IV of the
         Forty-first  Supplemental  Indenture,  have  been  installed  in public
         streets or alleys and in highways under  ordinances and permits granted
         by the various  governmental bodies having  jurisdiction,  or have been
         constructed on leaseholds,  easements or  rights-of-way  granted,  with
         minor exceptions, by the apparent owners of record of the land and such
         leases,  easements,  or rights-of-way  are subject to any defects in or
         encumbrances  on the title of the respective  lessors of such leases or
         grantors of such  easements or  rights-of-way;  title to the  aforesaid
         properties  is  subject  only  to:  (A) the lien of the  Mortgage,  (B)
         Excepted Encumbrances as defined in the Mortgage,  and (C) other liens,
         encumbrances  or  defects,  none  of  which,  individually  or  in  the
         aggregate,  materially interfere with the business or operations of the
         Company (with respect to leasehold interests on the Navajo Reservation,
         this  representation  is intended and shall be  understood to mean only
         that the  Company is the owner of the rights  conferred  upon it by the
         leases from the Navajo Tribe  relating to the sites on which the Navajo
         Plant  and the Four  Corners  Plant  are  located,  and that  while the
         Company  is not  aware of the  assertion  of any claim  contesting  the
         interest of the Navajo Tribe in the lands leased,  the Company does not
         give any  representation  with  respect to the  interest  of the Navajo
         Tribe in the lands leased or with respect to the enforceability of such
         leases against the Navajo Tribe);  the Mortgage,  subject only as above
         set forth in this  clause,  now  constitutes,  and the Mortgage and the
         Supplemental Indentures theretofore executed, subject only as above set
         forth in this clause, when the latter shall have been duly recorded and
         filed, will constitute,  together and as a single instrument,  a direct
         and valid first mortgage lien upon said  properties,  which include all
         of the  properties  of the Company  (other than the classes or items of
         property expressly excepted in the Mortgage); and all properties (other
         than the  classes  or  items  of  property  expressly  excepted  in the
         Mortgage or expressly  released from the lien thereof)  acquired by the
         Company after the date of the  Supplemental  Indenture  relating to the
         Purchased  Bonds in each county in the States of Arizona and New Mexico
         in which the Mortgage and the  Supplemental  Indenture  shall have been
         duly recorded and filed (and, as to which  properties,  with respect to
         priority  only,  any  necessary  recordation  and/or  filing  has  been
         accomplished,   including   therein  any  necessary   descriptions   of
         after-acquired   real   property   and   real   property   upon   which
         after-acquired  fixtures  are  affixed)  will,  upon such  acquisition,
         become subject to the first mortgage lien thereof, subject, however, to
         Excepted  Encumbrances and to liens, if any, existing or placed thereon
         at the time of the acquisition thereof by the Company and, with respect
         to priority only, to liens,  if any,  existing prior to the time of any
         necessary recordation and/or filing by the Company.

              (e) The  Company  holds such  valid  franchises,  certificates  of
         convenience and necessity,  licenses, and permits as are necessary with
         respect to the  maintenance  and operation of its property and business
         as now  conducted,  except that (A) the Company from time to time makes
         minor  extensions of its system prior to the time a related  franchise,
         certificate,  license,  or  permit is  procured,  (B) from time to time
         communities already being served by the Company become incorporated and
         considerable  time may  elapse  before a  franchise  is  procured,  (C)
         certain franchises may have expired prior to the renegotiation thereof,
         (D) the  Company may not have  obtained  certain  permits or  variances
         relating to the environmental requirements described in any of its Form
         10-K  Report,  its Form  10-Q  Reports,  and/or  its  Form 8-K  Reports
         incorporated by reference in the Registration  Statements,  (E) certain
         minor defects and exceptions may exist which,  individually  and in the
         aggregate,  are not deemed material,  and (F) the Company does not make
         any  representation  regarding the geographical scope of any franchise,
         certificate,  license,  or  permit  that  is  not  specific  as to  its
         geographical scope.

     3.  Purchase and Offering.  The obligation of the Underwriters to purchase,
and the obligation of the Company to sell, the Purchased Bonds will be evidenced
by an exchange of facsimile  transmission or other written  communications  (the
"Terms  Agreement")  at the time the Company  determines  to sell the  Purchased
Bonds.  The Terms  Agreement  shall  specify (by  incorporation  by reference or
otherwise)  the parties that will be  Underwriters,  the principal  amount to be
purchased  by  each,  the  purchase  price to be paid by the  Underwriters,  any
compensation or commissions to be paid to Underwriters,  the offering price, and
the  terms of the  Purchased  Bonds  not  already  specified  in the  Indenture,
including, but not limited to, interest rates, maturity,  redemption provisions,
and sinking fund  requirements,  if any. The Terms  Agreement shall also specify
(by  incorporation  by reference or otherwise) the time and date of delivery and
payment (the "Closing Date"), the place of delivery and payment, and any details
of the terms of offering that should be reflected in the  prospectus  supplement
relating to the offering of the Purchased Bonds (the  "Prospectus  Supplement").
It is understood that the  Underwriters  will offer the Purchased Bonds for sale
as set forth in the Prospectus.  The obligations of the Underwriters to purchase
the Purchased  Bonds shall be several and not joint.  Except as may otherwise be
set forth in the Terms Agreement, the Purchased Bonds will be in definitive form
and in such  denominations  and registered in such names as the Underwriters may
request.

     4.  Covenants of the Company. In connection with each offering of Purchased
Bonds, the Company covenants and agrees with the several Underwriters that:

              (a)   The   Company   will   advise   the   Underwriters   or  the
         Representatives  promptly of any proposed  amendment or supplementation
         of the First Registration Statement, the Second Registration Statement,
         the Third Registration Statement, or the Prospectus and will not effect
         such   amendment  or   supplementation   without  the  consent  of  the
         Underwriters or the  Representatives.  The Company will also advise the
         Underwriters  or  the   Representatives   of  the  institution  by  the
         Commission  of any stop  order  proceedings  in  respect  of the  First
         Registration Statement,  the Second Registration  Statement,  the Third
         Registration  Statement,  or of any part thereof, and will use its best
         efforts to prevent the issuance of any such stop order and to obtain as
         soon as possible its lifting, if issued.

              (b) If, at any time when a  prospectus  relating to the  Purchased
         Bonds is required to be delivered  under the Act, any event occurs as a
         result of which the  Prospectus as then amended or  supplemented  would
         include an untrue  statement of a material  fact,  or omit to state any
         material fact necessary to make the statements therein, in the light of
         the circumstances under which they were made, not misleading,  or if it
         is necessary at any time to amend or supplement the First  Registration
         Statement,  the Second Registration  Statement,  the Third Registration
         Statement,  or the  Prospectus  to  comply  with the Act,  the  Company
         promptly  will  prepare and file with the  Commission  an  amendment or
         supplement that will correct such statement or omission or an amendment
         that will effect such compliance.

              (c) As soon as  practicable,  but not later than 18 months,  after
         the date of the Terms Agreement  relating to the Purchased  Bonds,  the
         Company will make generally available to its securityholders an earning
         statement or statements  (which need not be audited)  covering a period
         of at least 12 months  beginning  after the effective date of the Third
         Registration Statement (as defined in Rule 158(c) under the Act), which
         will satisfy the  provisions  of Section ll(a) of the Act and the rules
         and regulations thereunder.

              (d)  The  Company  will  furnish  to  the   Underwriters   or  the
         Representatives such copies of the Registration  Statements  (including
         one copy of the Third Registration  Statement for each  Representative,
         or for each  Underwriter if there are no  Representatives,  and for the
         counsel  for  the  Underwriters,  which  is  signed  and  includes  all
         exhibits),  any  related  preliminary  prospectus  supplements  and the
         Prospectus,  including all amendments or supplements to such documents,
         as may be reasonably requested.

              (e) The Company will arrange or cooperate in arrangements  for the
         qualification of the Purchased Bonds for sale and the  determination of
         their  eligibility for investment under the laws of such  jurisdictions
         as the Underwriters or the Representatives  designate and will continue
         such  qualifications in effect so long as required for the distribution
         of the Purchased Bonds, provided that the Company shall not be required
         to qualify as a foreign corporation in any State, to consent to service
         of process in any State other than with  respect to claims  arising out
         of the  offering  or  sale of the  Purchased  Bonds,  or to meet  other
         requirements deemed by it to be unduly burdensome.

              (f) During  the  period of five years  after the date of the Terms
         Agreement  relating to the Purchased Bonds, the Company will furnish to
         the Underwriters or the Representatives  thereunder, and, upon request,
         each of the other  Underwriters,  (i) as soon as practicable  after the
         end of each fiscal year, a balance  sheet and  statements of income and
         retained  earnings  of the  Company as at the end of and for such year,
         all  in  reasonable   detail  and  certified  by   independent   public
         accountants,  and (ii) (A) as soon as practicable after the end of each
         quarterly fiscal period (except for the last quarterly fiscal period of
         each  fiscal  year),  a balance  sheet and  statement  of income of the
         Company as at the end of and for such period,  all in reasonable detail
         and  certified by a principal  financial or  accounting  officer of the
         Company, (B) as soon as available, a copy of each report of the Company
         mailed by the Company to stockholders or filed with the Commission, and
         (C) from time to time, such other information concerning the Company as
         may  reasonably  be  requested.  So  long  as the  Company  has  active
         subsidiaries, such financial statements will be on a consolidated basis
         to the extent the  accounts  of the Company  and its  subsidiaries  are
         consolidated.

              (g) The Company will pay all expenses  incident to the performance
         of its  obligations  under  this  Agreement,  and  will  reimburse  the
         Underwriters for any reasonable expenses (including reasonable fees and
         disbursements  of  counsel)  incurred  by them in  connection  with the
         qualification  of the  Purchased  Bonds with respect to which the Terms
         Agreement  relating to the  Purchased  Bonds has been entered for sale,
         and the  determination of their  eligibility for investment,  under the
         laws of such jurisdictions as the  Representatives  or, if there are no
         Representatives,  the  Underwriters  designate,  and  the  printing  of
         memoranda  relating  thereto,  and for any fees  charged by  investment
         rating agencies for the rating of the Purchased Bonds.

              (h) The Company  will not offer or sell any of its First  Mortgage
         Bonds  for a period  beginning  at the time of  execution  of the Terms
         Agreement  relating  to the  Purchased  Bonds and ending on the Closing
         Date relating  thereto without prior consent of the Underwriters or the
         Representatives.

     5.  Conditions of the Obligations of the  Underwriters.  The obligations of
the several  Underwriters  to purchase and pay for the  Purchased  Bonds will be
subject to the accuracy of the representations and warranties on the part of the
Company  herein,  to the accuracy of the  statements  of Company  officers  made
pursuant to the  provisions  hereof,  to the  performance  by the Company of its
obligations hereunder, and to the following additional conditions precedent:

              (a) The Underwriters or the Representatives  shall have received a
         letter  from  DELOITTE  &  TOUCHE  LLP,  dated  the  date of the  Terms
         Agreement,  confirming  that  they  are  independent  certified  public
         accountants within the meaning of the Act and the applicable  published
         Rules and  Regulations  thereunder,  and  stating in effect that (i) in
         their  opinion the  financial  statements  and schedules of the Company
         examined by them and  incorporated  by  reference  in the  Registration
         Statements  comply  as to  form  in  all  material  respects  with  the
         applicable  accounting  requirements of the Securities  Exchange Act of
         1934  (the  "1934  Act")  and  the  published   Rules  and  Regulations
         thereunder  and (ii) on the basis of a reading of the latest  available
         interim financial statements of the Company,  inquiries of officials of
         the Company responsible for financial and accounting matters, and other
         specified procedures,  nothing came to their attention that caused them
         to believe that (A) the unaudited financial statements  incorporated by
         reference,  if any, in the Registration  Statements do not comply as to
         form  in  all  material   respects  with  the   applicable   accounting
         requirements  of the 1934 Act and the published  Rules and  Regulations
         thereunder or are not stated on a basis  substantially  consistent with
         that of the audited financial  statements  incorporated by reference in
         the  Registration  Statements,  (B) at the  date  of  the  most  recent
         available  unaudited  financial  statements and at a specified date not
         more than five days prior to the date of this Agreement,  there was any
         increase in the amounts of common stock, redeemable preferred stock, or
         non-redeemable   preferred  stock  of  the  Company  or  any  increase,
         exceeding $10,000,000, in long-term debt of the Company or, at the date
         of the most recent available unaudited  financial  statements there was
         any decrease in net assets as compared  with amounts  shown in the most
         recent   financial   statements   incorporated   by  reference  in  the
         Registration  Statements,  or (C) for the twelve-month  period ended at
         the date of the most recent available  unaudited  financial  statements
         there  were  any   decreases,   exceeding  3%,  as  compared  with  the
         twelve-month  period  ended at the date of the  most  recent  financial
         statements incorporated by reference in the Registration Statements, in
         the amounts of total  revenues  or net income,  except in all cases for
         increases or decreases  which result from the declaration or payment of
         dividends, or which the Registration Statements (including any material
         incorporated by reference therein) disclose have occurred or may occur,
         or which are described in such letter.

              (b) No  stop  order  suspending  the  effectiveness  of the  First
         Registration Statement,  the Second Registration  Statement,  the Third
         Registration  Statement, or any part thereof shall have been issued and
         no proceedings  for that purpose shall have been  instituted or, to the
         knowledge of the Company or the Underwriters,  shall be contemplated by
         the Commission.

              (c) Subsequent to the execution of the Terms Agreement relating to
         the Purchased Bonds,  (i) there shall not have occurred any change,  or
         any  development  involving  a  prospective  change,  in  or  affecting
         particularly   the  business  or  properties  of  the  Company  or  its
         subsidiaries  which,  in the  judgment of a majority in interest of the
         Underwriters under such Terms Agreement, including any Representatives,
         materially  impairs the investment quality of the Purchased Bonds, (ii)
         there shall not have  occurred a suspension  or material  limitation in
         trading in securities  generally on the New York Stock Exchange,  (iii)
         there  shall not have  occurred  a  general  moratorium  on  commercial
         banking  activities in New York declared by either  Federal or New York
         State  authorities,  (iv)  no  rating  of  any of  the  Company's  debt
         securities  shall have been lowered and there shall have been no public
         announcement  that  any  such  debt  securities  have  been  placed  on
         CreditWatch, Watchlist, or under any similar surveillance or review, in
         each case with negative implications,  by any recognized rating agency,
         and (v) there shall not have  occurred  any outbreak or  escalation  of
         major  hostilities  in  which  the  United  States  is  involved,   any
         declaration  of war by  Congress or any other  substantial  national or
         international  calamity or emergency  if, in the judgment of a majority
         in interest of the Underwriters  under such Terms Agreement,  including
         any  Representatives,  the  effect  of any such  outbreak,  escalation,
         declaration,  calamity or emergency makes it impractical or inadvisable
         to proceed with completion of the sale of and payment for the Purchased
         Bonds.

              (d) The Underwriters or the Representatives shall have received an
         opinion of Snell & Wilmer  L.L.P.,  counsel for the Company,  dated the
         relevant Closing Date, to the effect that:

                       (i) The Company is a corporation duly organized,  validly
                  existing,  and in good standing under the laws of the State of
                  Arizona and has full corporate power and authority to carry on
                  its business as presently  conducted;  and the Company is duly
                  qualified  as a foreign  corporation  to do business and is in
                  good  standing  in the  State of New  Mexico,  the only  other
                  jurisdiction in which it owns or leases substantial properties
                  or  in  which  the  conduct  of  its  business  requires  such
                  qualification;

                       (ii) The  Purchased  Bonds  have  been  duly  authorized,
                  executed,  authenticated,  issued,  and delivered,  constitute
                  valid and legally binding  obligations of the Company entitled
                  to the benefits and security provided by the Indenture (except
                  as the same may be limited by (a) general principles of equity
                  or by  bankruptcy,  insolvency,  reorganization,  arrangement,
                  moratorium,  or other laws or equitable principles relating to
                  or affecting the enforcement of creditors' rights generally or
                  the enforcement of the security provided by the Indenture, (b)
                  the necessity  for  compliance  with the statutory  procedural
                  requirements  governing  the exercise of remedies by a secured
                  creditor,  and (c) the  qualification  that  certain  waivers,
                  procedures,  remedies,  and other  provisions of the Purchased
                  Bonds and the Indenture may be unenforceable  under or limited
                  by the law of the State of Arizona; however, such law does not
                  in such counsel's opinion  substantially prevent the practical
                  realization  of the benefits  intended by such  documents) and
                  conform to the description thereof in the Prospectus;

                       (iii) The Indenture has been duly  authorized,  executed,
                  and  delivered,  has  been  duly  qualified  under  the  Trust
                  Indenture Act, and constitutes a valid and binding  instrument
                  enforceable  in  accordance  with its terms except as the same
                  may be  limited  by (a)  general  principles  of  equity or by
                  bankruptcy,    insolvency,    reorganization,     arrangement,
                  moratorium,  or other laws or equitable principles relating to
                  or affecting the enforcement of creditors' rights generally or
                  the enforcement of the security provided by the Indenture, (b)
                  the necessity  for  compliance  with the statutory  procedural
                  requirements  governing  the exercise of remedies by a secured
                  creditor,  and (c) the  qualification  that  certain  waivers,
                  procedures,  remedies,  and other  provisions of the Purchased
                  Bonds and the Indenture may be unenforceable  under or limited
                  by the law of the State of Arizona; however, such law does not
                  in such counsel's opinion  substantially prevent the practical
                  realization of the benefits intended by such documents;

                       (iv) Except for property  specifically  excepted from the
                  lien of the Indenture or released therefrom in accordance with
                  the terms thereof,  the Company has good and marketable  title
                  in fee simple, except for items described in (A), (B), and (C)
                  below,  to all of  the  real  property  and  fixtures  thereon
                  purported  in the  Indenture  to be so held  and that are both
                  located in the State of Arizona and  described  in those title
                  reports  covering  at  least  the  Saguaro,   Yucca,   Cholla,
                  Ocotillo,  West  Phoenix,  and Palo Verde plant sites that are
                  listed on an exhibit to such opinion  (the "Title  Documents")
                  (in giving such opinion, such counsel may rely solely upon the
                  Title Documents and may assume the accuracy thereof and of the
                  real  property  descriptions  contained  therein and may state
                  that no other  investigation  or  inquiry  has been  made with
                  respect thereto),  and in giving the opinions  described below
                  with respect to any liens,  defects,  and encumbrances on such
                  title to such personal property,  such counsel may assume that
                  the Company  has good and valid  title to all of the  personal
                  property  located in the State of Arizona and described in the
                  Indenture as subject to the lien thereof (which property shall
                  not include fixtures),  and such counsel may rely solely upon,
                  and assume the accuracy of, a search of the Uniform Commercial
                  Code Financing  Statements filed in the records of the Arizona
                  Secretary  of State and may assume  that there are no liens or
                  other  encumbrances  on  personal  property  (as  used  in the
                  Arizona Uniform Commercial Code) of the Company located in the
                  State of Arizona other than liens or other  encumbrances  that
                  have been  perfected  by filing with the Arizona  Secretary of
                  State  under  Arizona  Revised  Statutes   ("A.R.S.")  Section
                  47-9401.A;  such title is subject only to: (A) the lien of the
                  Mortgage,   (B)  Excepted   Encumbrances  as  defined  in  the
                  Mortgage, and (C) other liens, encumbrances,  or defects, none
                  of which,  individually or in the aggregate, in the opinion of
                  such  counsel,  materially  interfere  with  the  business  or
                  operations  of the  Company (in  determining  whether any such
                  other liens,  encumbrances,  or defects  materially  interfere
                  with the business or operations  of the Company,  such counsel
                  may rely solely upon a  certificate  of an officer or engineer
                  of the Company  which  shall be  attached to such  opinion and
                  such opinion may state that no other  investigation or inquiry
                  with respect  thereto has been made);  the  Mortgage,  subject
                  only as above set forth in this clause,  now constitutes,  and
                  the  Mortgage  and  the  Supplemental  Indentures  theretofore
                  executed, subject only as above set forth in this clause, when
                  the latter  shall  have been duly  recorded  and  filed,  will
                  constitute,  together and as a single instrument, a direct and
                  valid  first  mortgage  lien  upon  said  property;   and  all
                  properties  (other  than the  classes  or  items  of  property
                  expressly  excepted in the Mortgage or expressly released from
                  the lien  thereof)  acquired by the Company  after the date of
                  the Supplemental  Indenture relating to the Purchased Bonds in
                  each county in the State of Arizona in which the  Mortgage and
                  the  Supplemental  Indenture shall have been duly recorded and
                  filed  and,  with  respect to  priority  only,  any  necessary
                  recordation  and/or  filing has been  accomplished  (including
                  therein any  necessary  descriptions  of  after-acquired  real
                  property and real property upon which after-acquired  fixtures
                  are affixed) will,  upon such  acquisition,  become subject to
                  the first mortgage lien thereof, subject, however, to Excepted
                  Encumbrances and to liens, if any,  existing or placed thereon
                  at the time of the  acquisition  thereof by the  Company  and,
                  with  respect to priority  only,  to liens,  if any,  existing
                  prior to the time of any necessary  recordation  and/or filing
                  by the Company;

                       (v) The Company is the owner of the rights conferred upon
                  it by the leases from the Navajo Tribe relating to the site on
                  which the Navajo  Plant is located  and while such  counsel is
                  not aware of the assertion of any claim  contesting  the title
                  of the Navajo Tribe to the lands  leased,  such counsel  shall
                  not be required to express  any  opinion  with  respect to the
                  interest  of the  Navajo  Tribe in the  lands  leased  or with
                  respect  to the  enforceability  of such  leases  against  the
                  Navajo Tribe;

                       (vi)   With   certain   exceptions,   a  public   service
                  corporation is required to obtain  certificates of convenience
                  and necessity from the Arizona  Corporation  Commission  under
                  A.R.S.  Section 40-281.A for construction of its lines, plant,
                  services,  or systems, or any extensions  thereof,  within the
                  State of Arizona, and to obtain franchises or similar consents
                  or permits from counties and incorporated municipalities under
                  A.R.S. Section 40-283.A for the construction,  operation,  and
                  maintenance of transmission lines within the State of Arizona;
                  to the best of such counsel's knowledge after due inquiry, the
                  Company   holds  such  valid   franchises,   certificates   of
                  convenience and necessity,  consents,  and permits pursuant to
                  such statutory provisions as are necessary with respect to the
                  maintenance  and operation of its property and business as now
                  conducted, except that (A) the Company from time to time makes
                  minor  extensions  of its  system  prior to the time a related
                  franchise,  certificate,  license, or permit is procured,  (B)
                  from  time to time  communities  already  being  served by the
                  Company become  incorporated and considerable  time may elapse
                  before a franchise is  procured,  (C) certain  franchises  may
                  have expired prior to the renegotiation  thereof,  (D) certain
                  minor defects and exceptions may exist which, individually and
                  in the  aggregate,  are not  deemed  material,  and  (E)  such
                  counsel need not be required to express any opinion  regarding
                  the geographical scope of any franchise, certificate, license,
                  or permit that is not specific as to its geographical scope;

                       (vii) The issuance and sale of the Purchased Bonds on the
                  terms and conditions set forth or  contemplated  herein and in
                  the  Prospectus  and  the  Terms  Agreement  relating  to  the
                  Purchased   Bonds  and  the  execution  and  delivery  of  the
                  Supplemental  Indenture  relating to the Purchased  Bonds have
                  been duly  authorized by the Arizona  Corporation  Commission,
                  said  Commission  had  jurisdiction  in the  premises,  and no
                  further  approval,  authorization,  or  consent  of any  other
                  public  board or body is  necessary  to the  validity  of such
                  issuance and sale of such Purchased Bonds or the execution and
                  delivery  of such  Supplemental  Indenture,  except  as may be
                  required under state  securities or blue sky laws, as to which
                  laws such counsel shall not be required to express an opinion;

                       (viii)  The  First  Registration  Statement,  the  Second
                  Registration  Statement,  and the Third Registration Statement
                  have become  effective  under the Act, and, to the best of the
                  knowledge  of such  counsel,  no  stop  order  suspending  the
                  effectiveness of the First Registration Statement,  the Second
                  Registration  Statement,  or the Third Registration  Statement
                  has been issued and no proceedings  for that purpose have been
                  instituted or are pending or  contemplated  under the Act, and
                  each  part  of the  Registration  Statements  relating  to the
                  Bonds, when such part became effective, and the Prospectus, as
                  of the date of the Prospectus  Supplement,  and each amendment
                  or supplement  thereto,  as of their  respective  effective or
                  issue dates, complied as to form in all material respects with
                  the  requirements of the Act, the Trust Indenture Act, and the
                  published Rules and Regulations; such counsel has no reason to
                  believe  that any part of the  Registration  Statements,  when
                  such  part  became  effective,   or  the  First   Registration
                  Statement,   the  Second  Registration  Statement,  the  Third
                  Registration Statement,  or the Prospectus,  as of the date of
                  the Prospectus  Supplement,  or as of the Closing Date, or any
                  amendment  or  supplement  thereto,  as  of  their  respective
                  effective or issue dates, or as of the Closing Date, contained
                  any untrue  statement  of a material  fact or omitted to state
                  any material fact  required to be stated  therein or necessary
                  to  make  the   statements   therein   not   misleading;   the
                  descriptions in the Registration  Statements and Prospectus of
                  statutes,  legal and  governmental  proceedings and contracts,
                  and other  documents  are  accurate  and  fairly  present  the
                  information  required to be shown; and to the actual knowledge
                  of  those  persons  in the  lawyer  group  described  in  such
                  opinion,  there  are  no  legal  or  governmental  proceedings
                  required  to be  described  in the  Prospectus  that  are  not
                  described  as  required,  nor any  contracts or documents of a
                  character   required  to  be  described  in  the  Registration
                  Statements  or  Prospectus  or to be filed as  exhibits to the
                  Registration  Statements  that are not  described and filed as
                  required (it being  understood  that such counsel need express
                  no opinion as to the financial  statements or other  financial
                  data   contained  in  the   Registration   Statements  or  the
                  Prospectus); and

                       (ix) This  Agreement  and the Terms  Agreement  have been
                  duly authorized, executed, and delivered by the Company.

     In giving  such  opinion,  (a) Snell & Wilmer  L.L.P.  may rely solely upon
certificates  of the  Company  as to any  factual  matters  upon  which any such
opinions  are based and may rely upon the  opinion  of  Keleher & McLeod,  P.A.,
referred to below,  as to all  matters  governed by the laws of the State of New
Mexico,  but the opinion of Snell & Wilmer L.L.P.  shall state that, though they
are members of the Arizona Bar and do not hold  themselves out as experts on the
laws of the  State of New  Mexico,  they  have  made a study of the laws of such
State  insofar  as such laws are  involved  in the  conclusions  stated in their
opinion, other than such laws as relate to matters of title, and from such study
it is their opinion that such laws support such  conclusions  and that, in their
opinion,  the Underwriters and they are justified to such extent in relying upon
the opinion of Keleher & McLeod,  P.A.;  and (b) the lawyer group referred to in
such opinion will mean those lawyers in the offices of Snell & Wilmer L.L.P. who
(i) have billed any time on the  particular  transaction  to which such  opinion
relates or (ii) have  billed  more than ten hours to any  Company  matter in the
twelve-month  period  preceding  the date on which the list of such  lawyers was
compiled for purposes of inquiry pursuant to such opinion.

         (e) The  Underwriters  or the  Representatives  shall have  received an
    opinion of Keleher & McLeod, P.A., New Mexico counsel for the Company, dated
    the Closing Date, to the effect that:

              (i) The Company is duly  qualified as a foreign  corporation to do
         business  and is in good  standing  in the State of New  Mexico and has
         full corporate power and authority to engage in the State of New Mexico
         in the business now conducted by it therein;

              (ii) The  activities  of the Company in the State of New Mexico to
         date do not constitute it a "public utility" as that term is defined in
         the  relevant  laws of the State of New  Mexico,  and  accordingly,  no
         public utility  franchises or certificates of convenience and necessity
         are necessary  under New Mexico law with respect to the maintenance and
         operation of the  Company's  property and business as now  conducted in
         the State of New Mexico and no approval,  authorization,  or consent of
         the New Mexico Public  Utility  Commission or any other public board or
         body of the State of New Mexico is required  for the  issuance and sale
         of the Purchased  Bonds on the terms and  conditions  herein and in the
         Prospectus  set  forth  or  contemplated  or for the  execution  of the
         Supplemental  Indenture relating to the Purchased Bonds,  except as may
         be required  under New Mexico state  securities or blue sky laws, as to
         which laws such counsel shall not be required to express an opinion;

              (iii) Assuming that the Company has good and valid title to all of
         the personal  property located in the State of New Mexico and described
         in the Indenture as subject to the lien thereof  (which  property shall
         not include  fixtures)  ("Personal  Property"),  in giving the opinions
         described below with respect to any liens,  defects and encumbrances on
         such title to such  Personal  Property,  such  counsel  may rely solely
         upon,  and assume the accuracy  of, a search of the Uniform  Commercial
         Code  Financing  Statements  filed  in the  records  of the New  Mexico
         Secretary  of State  and may  assume  that  there are no liens or other
         encumbrances  on personal  property (as used in the New Mexico  Uniform
         Commercial  Code) of the  Company  located  in the State of New  Mexico
         other  than liens or other  encumbrances  that have been  perfected  by
         filing with the New Mexico  Secretary of State under Section  55-9-401,
         New  Mexico  Statutes  Annotated  1978;  such  title  to such  Personal
         Property is subject only to: (A) the lien of the Mortgage, (B) Excepted
         Encumbrances  as  defined  in  the  Mortgage,   and  (C)  other  liens,
         encumbrances,  or  defects,  none  of  which,  individually  or in  the
         aggregate,  in the opinion of such counsel,  materially  interfere with
         the business or operations of the Company (in  determining  whether any
         such other liens,  encumbrances,  or defects materially  interfere with
         the business or operations of the Company, such counsel may rely solely
         upon a certificate of an officer or engineer of the Company which shall
         be  attached to such  opinion and such  opinion may state that no other
         investigation  or inquiry  with  respect  thereto has been  made);  the
         Mortgage,  subject  only  as  above  set  forth  in  this  clause,  now
         constitutes,   and  the  Mortgage  and  the   Supplemental   Indentures
         theretofore  executed,  subject only as above set forth in this clause,
         when  the  latter  shall  have  been  duly  recorded  and  filed,  will
         constitute,  together  and as a single  instrument,  a direct and valid
         first  mortgage lien upon such Personal  Property;  and all  properties
         (other than the classes or items of property  expressly excepted in the
         Mortgage or expressly  released from the lien thereof)  acquired by the
         Company after the date of the  Supplemental  Indenture  relating to the
         Purchased  Bonds in each county in the State of New Mexico in which the
         Mortgage and the  Supplemental  Indenture shall have been duly recorded
         and filed and, with respect to priority only, any necessary recordation
         and/or filing has been  accomplished  (including  therein any necessary
         descriptions  of  after-acquired  real  property and real property upon
         which after-acquired fixtures are affixed) will, upon such acquisition,
         become subject to the first mortgage lien thereof, subject, however, to
         Excepted  Encumbrances and to liens, if any, existing or placed thereon
         at the time of the acquisition thereof by the Company and, with respect
         to priority only, to liens,  if any,  existing prior to the time of any
         necessary recordation and/or filing by the Company;

              (iv) The Company is the owner of the rights  conferred  upon it by
         the leases from the Navajo Tribe relating to the site on which the Four
         Corners  plant is located  and while  such  counsel is not aware of the
         assertion of any claim  contesting  the interest of the Navajo Tribe in
         the lands  leased,  such  counsel  shall not be required to express any
         opinion  with  respect to the interest of the Navajo Tribe in the lands
         leased or with respect to the enforceability of such leases against the
         Navajo Tribe.

In giving such opinion, Keleher & McLeod, P.A. may rely solely upon certificates
of the Company as to any factual matters upon which any such opinions are based.

              (f) The  Underwriters or the  Representatives  shall have received
         from counsel for the Underwriters  such opinion or opinions,  dated the
         Closing Date,  with respect to the  incorporation  of the Company,  the
         validity of the  Purchased  Bonds,  the  Registration  Statements,  the
         Prospectus,  and other related  matters as may  reasonably be required,
         and the Company shall have  furnished to such counsel such documents as
         they  request  for the  purpose  of  enabling  them to pass  upon  such
         matters.  In rendering  such  opinion,  such counsel may rely as to the
         incorporation of the Company and all other matters governed by the laws
         of the States of Arizona  and New Mexico  upon the  opinions of Snell &
         Wilmer L.L.P. and Keleher & McLeod, P.A., referred to above.

              (g) The Underwriters or the Representatives  shall have received a
         certificate  of the  President  or any Vice  President  and a principal
         financial or accounting officer of the Company, dated the Closing Date,
         in which such officers, to the best of their knowledge after reasonable
         investigation,  shall state that the  representations and warranties of
         the Company in this  Agreement  are true and correct,  that the Company
         has complied with all  agreements  and satisfied all  conditions on its
         part to be performed or satisfied at or prior to the Closing Date, that
         no stop order suspending the  effectiveness  of the First  Registration
         Statement, the Second Registration Statement, or the Third Registration
         Statement has been issued and no proceedings for that purpose have been
         instituted or are contemplated by the Commission,  and that, subsequent
         to the date of the most recent financial  statements in the Prospectus,
         there has been no material adverse change in the financial  position or
         results of operations of the Company and its subsidiaries except as set
         forth  or  contemplated  in the  Prospectus  or as  described  in  such
         certificate.

              (h) The Underwriters or the Representatives  shall have received a
         letter of DELOITTE & TOUCHE LLP,  dated the Closing  Date,  which meets
         the  requirements  of subsection  (a) of this Section,  except that the
         specified date referred to in such  subsection  will be a date not more
         than five  days  prior to the  Closing  Date for the  purposes  of this
         subsection.

         The Company will furnish the Underwriters or the  Representatives  with
such conformed copies of such opinions, certificates,  letters, and documents as
may be reasonably requested.

         6.  Indemnification.  (a) The Company will  indemnify and hold harmless
each Underwriter and each person,  if any, who controls such Underwriter  within
the meaning of the Act against any losses, claims, damages or liabilities, joint
or several,  to which such  Underwriter  or such  controlling  person may become
subject, under the Act or otherwise, insofar as such losses, claims, damages, or
liabilities  (or actions in respect  thereof) arise out of or are based upon any
untrue  statement or alleged untrue  statement of any material fact contained in
any part of the Registration  Statements  relating to the Bonds,  when such part
became effective,  the First  Registration  Statement,  the Second  Registration
Statement, the Third Registration Statement, the Prospectus, or any amendment or
supplement  thereto,  or arise out of or are based upon the  omission or alleged
omission  to state  therein a material  fact  required  to be stated  therein or
necessary to make the statements therein not misleading; and will reimburse each
Underwriter  and each such  controlling  person for any legal or other  expenses
reasonably incurred by such Underwriter or such controlling person in connection
with  investigating or defending any such loss,  claim,  damage,  liability,  or
action; provided,  however, that the Company will not be liable in any such case
to the extent that any such loss,  claim,  damage, or liability arises out of or
is based upon an untrue  statement  or alleged  untrue  statement or omission or
alleged  omission  made  in  any of  such  documents  in  reliance  upon  and in
conformity with written information  furnished to the Company by any Underwriter
specifically  for use therein.  This indemnity  agreement will be in addition to
any liability which the Company may otherwise have.

         (b) Each  Underwriter  will  severally  indemnify and hold harmless the
Company,  each of its  directors,  each of its  officers  who  have  signed  the
Registration  Statements,  and each  person,  if any,  who  controls the Company
within  the  meaning  of the  Act,  against  any  losses,  claims,  damages,  or
liabilities to which the Company or any such director,  officer,  or controlling
person may become subject,  under the Act or otherwise,  insofar as such losses,
claims,  damages, or liabilities (or actions in respect thereof) arise out of or
are based upon any untrue  statement or alleged untrue statement of any material
fact contained in any part of the Registration Statements relating to the Bonds,
when such part became effective,  the First Registration  Statement,  the Second
Registration Statement, the Third Registration Statement, the Prospectus, or any
amendment or supplement  thereto, or arise out of or are based upon the omission
or the alleged  omission to state  therein a material fact required to be stated
therein or necessary to make the statements therein not misleading, in each case
to the extent,  but only to the extent,  that such untrue  statement  or alleged
untrue  statement or omission or alleged  omission was made in reliance upon and
in  conformity  with  written  information  furnished  to the  Company  by  such
Underwriter  specifically for use therein; and will reimburse any legal or other
expenses  reasonably  incurred by the Company or any such director,  officer, or
controlling  person in connection with investigating or defending any such loss,
claim,  damage,  liability,  or  action.  This  indemnity  agreement  will be in
addition to any liability which such Underwriter may otherwise have.

         (c) Promptly after receipt by an  indemnified  party under this Section
of notice of the commencement of any action,  such indemnified  party will, if a
claim in respect thereof is to be made against the indemnifying party under this
Section,  notify the  indemnifying  party of the commencement  thereof;  but the
omission  so to notify  the  indemnifying  party  will not  relieve  it from any
liability that it may have to any  indemnified  party  otherwise than under this
Section.  In case any such action is brought against any indemnified  party, and
it notifies the indemnifying party of the commencement thereof, the indemnifying
party will be entitled  to  participate  therein  and, to the extent that it may
wish, jointly with any other indemnifying  party similarly  notified,  to assume
the defense thereof,  with counsel  satisfactory to such indemnified  party (who
shall not,  without  the  consent of the  indemnified  party,  be counsel to the
indemnifying  party),  and  after  notice  from the  indemnifying  party to such
indemnified  party  of its  election  so to  assume  the  defense  thereof,  the
indemnifying  party  will not be liable to such  indemnified  party  under  this
Section  for  any  legal  or  other  expenses   subsequently  incurred  by  such
indemnified  party in connection  with the defense thereof other than reasonable
costs of investigation.

         (d) If the indemnification  provided for in this Section is unavailable
or  insufficient  to hold  harmless an  indemnified  party for any loss,  claim,
damage, liability, or action described in subsection (a) or (b) above, then each
indemnifying  party  shall  contribute  to the  amount  paid or  payable by such
indemnified  party as a result of the  losses,  claims,  damages or  liabilities
referred to in subsection (a) or (b) above on the following  basis:  (l) if such
loss,  claim,  damage,  liability,  or action arises under subsection (a) above,
then (i) in such  proportion as is appropriate to reflect the relative  benefits
received by the Company on the one hand and the  Underwriters  on the other from
the offering of the Bonds or (ii) if the allocation provided by clause (i) above
is not permitted by applicable  law, in such  proportion  as is  appropriate  to
reflect not only the relative  benefits referred to in clause (i) above but also
the relative  fault of the Company on the one hand and the  Underwriters  on the
other in  connection  with the  statements or omissions  which  resulted in such
losses,  claims,  damages or liabilities as well as any other relevant equitable
considerations; and (2) if such loss, claim, damage, liability, or action arises
under subsection (b) above, then in such proportion as is appropriate to reflect
the relative  fault of the Company on the one hand and the  Underwriters  on the
other in  connection  with the  statements or omissions  which  resulted in such
losses,  claims,  damages or liabilities as well as any other relevant equitable
considerations.  For the  purposes of clause (1) above,  the  relative  benefits
received by the Company on the one hand and the  Underwriters on the other shall
be  deemed to be in the same  proportion  as the  total  net  proceeds  from the
offering (before deducting  expenses)  received by the Company bear to the total
underwriting  discounts and commissions  received by the  Underwriters.  For the
purposes of clauses (1) and (2) above, the relative fault shall be determined by
reference to, among other things, whether the untrue or alleged untrue statement
of a material fact or the omission or alleged  omission to state a material fact
relates to  information  supplied  by the  Company or the  Underwriters  and the
parties'  relative intent,  knowledge,  access to information and opportunity to
correct or prevent  such untrue  statement  or  omission.  The amount paid by an
indemnified  party as a result of the  losses,  claims,  damages or  liabilities
referred  to in the first  sentence  of this  subsection  (d) shall be deemed to
include any legal or other  expenses  reasonably  incurred  by such  indemnified
party in connection with investigating or defending any action or claim which is
the  subject  of  this   subsection   (d).  No  person   guilty  of   fraudulent
misrepresentation  (within  the  meaning of  Section  ll(f) of the Act) shall be
entitled to  contribution  from any person who was not guilty of such fraudulent
misrepresentation.  The  Underwriters'  obligations  in this  subsection  (d) to
contribute   are  several  in  proportion  to  their   respective   underwriting
obligations and not joint.

         7. Default of Underwriters.  If any Underwriter or Underwriters default
in their obligations to purchase  Purchased Bonds pursuant to this Agreement and
the Terms  Agreement  and the  principal  amount of  Purchased  Bonds  that such
defaulting  Underwriter  or  Underwriters  agreed but failed to  purchase is ten
percent (10%) or less of the principal  amount of Purchased  Bonds to which such
Terms  Agreement  relates,  the  Underwriters  or the  Representatives  may make
arrangements  satisfactory  to the  Company for the  purchase of such  Purchased
Bonds  by  other  persons,  including  any of the  Underwriters,  but if no such
arrangements are made by the Closing Date the nondefaulting  Underwriters  shall
be obligated severally,  in proportion to their respective commitments hereunder
and under  such Terms  Agreement,  to  purchase  the  Purchased  Bonds that such
defaulting  Underwriter or  Underwriters  agreed but failed to purchase.  If any
Underwriter or  Underwriters  so default and the aggregate  principal  amount of
Purchased  Bonds with  respect to which such  default or defaults  occur is more
than the above-described  amount and arrangements  satisfactory to the remaining
Underwriters  and the Company for the purchase of such Purchased  Bonds by other
persons  are not made within  thirty-six  hours  after such  default,  the Terms
Agreement will  terminate  without  liability on the part of any  non-defaulting
Underwriter  or the  Company,  except as  provided in Section 8. As used in this
Agreement,  the  term  "Underwriter"  includes  any  person  substituted  for an
Underwriter  under  this  Section.  Nothing  herein  will  relieve a  defaulting
Underwriter from liability for its default.

         8. Survival of Certain Representations and Obligations.  The respective
indemnities,  agreements,  representations,  warranties, and other statements of
the Company or its officers and of the several Underwriters set forth in or made
pursuant to this  Agreement  will remain in full force and effect  regardless of
any investigation,  or statement as to the results thereof, made by or on behalf
of any  Underwriter  or the Company or any of its  officers or  directors or any
controlling  person,  and will survive delivery of and payment for the Purchased
Bonds. If any Terms Agreement is terminated pursuant to Section 7, or if for any
reason a  purchase  pursuant  to any Terms  Agreement  is not  consummated,  the
Company shall remain responsible for the expenses to be paid or reimbursed by it
pursuant  to Section 4 and the  respective  obligations  of the  Company and the
Underwriters pursuant to Section 6 shall remain in effect.

         9. Notices.  All  communications  hereunder relating to any offering of
Purchased  Bonds will be in writing,  and, if sent to the  Underwriters,  may be
mailed, delivered, or telecopied and confirmed to the Representative first named
in the Terms Agreement  relating to such Purchased Bonds or the  Underwriters at
their  addresses  furnished  to the  Company  in  writing  for  the  purpose  of
communications; provided, however, that any notice to an Underwriter pursuant to
Section 6 will be mailed,  delivered,  or telecopied  and confirmed to each such
Underwriter  at its own  address.  All  communications  hereunder to the Company
shall be  mailed  to the  Company,  Attention:  Treasurer,  at P.O.  Box  53999,
Phoenix,  Arizona 85072-3999,  or delivered,  or telecopied and confirmed to the
Company at 400 North Fifth Street, Phoenix, Arizona 85004.

         10.  Successors.  This  Agreement  will inure to the  benefit of and be
binding  upon the  parties  hereto and such  Underwriters  as are named in Terms
Agreements  and their  respective  successors and the officers and directors and
controlling  persons referred to in Section 6, and no other person will have any
right or obligation hereunder.

         11.  Representation of Underwriters.  The Representatives,  if any, may
act for the several  Underwriters  in  connection  with any  offering to which a
Terms  Agreement may relate,  and any action under this  Agreement or such Terms
Agreement taken by the Representatives jointly or the Representative first named
in  such  Terms  Agreement  in  such  capacity  will  be  binding  upon  all the
Underwriters of Purchased Bonds to which such Terms Agreement relates.

         12.  Execution in  Counterpart.  This Agreement and any Terms Agreement
may be executed in one or more counterparts, each of which shall be deemed to be
an original,  but all such respective  counterparts shall together  constitute a
single instrument.

         If the  foregoing  is in  accordance  with  your  understanding  of our
agreement, kindly sign and return to us the enclosed duplicate hereof, whereupon
it will  become  a  binding  agreement  between  the  Company  and  the  several
Underwriters in accordance with its terms.



                                                  Very truly yours,

                                                  ARIZONA PUBLIC SERVICE COMPANY


                                                  By
                                                     ---------------------------
                                                     Treasurer



The foregoing  Underwriting Agreement is hereby confirmed and accepted as of the
date first above written.


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