Filed Pursuant to Rule 424(b)(5)
                                                              File No. 333-58445


Prospectus Supplement (to Prospectus Dated November 2, 1999)


$250,000,000

ARIZONA PUBLIC SERVICE COMPANY                                               APS

Floating Rate Notes Due November 15, 2001

MATURITY

     *    The notes will mature on November 15, 2001.

INTEREST

     *    The  interest  rate  on the  notes  will  be  LIBOR  plus  0.72%.  The
          calculation  agent will determine  LIBOR and the interest rate will be
          reset for each quarterly interest period.

     *    Interest on the notes is payable on February 15, May 15, August 15 and
          November 15 of each year, beginning February 15, 2000.

     *    Interest will accrue from November 8, 1999.

REDEMPTION

     *    We may redeem some or all of the notes on any interest payment date on
          or after November 15, 2000. The redemption  price is described on page
          S-4.

     *    There is no sinking fund.

LISTING

     *    We do not intend to list the notes on any securities exchange.

RANKING

     *    The  notes  are  unsecured.  The notes  rank  equally  with all of our
          existing  and future  senior  unsecured  debt and senior to all of our
          existing and future subordinated debt and are effectively subordinated
          to all of our secured  debt.  As of September  30,  1999,  we had $1.0
          billion of outstanding secured debt.

                ------------------------------------------------
NEITHER  THE  SECURITIES  AND  EXCHANGE  COMMISSION  NOR  ANY  STATE  SECURITIES
COMMISSION  HAS  APPROVED  OR  DISAPPROVED  OF THE NOTES OR DETERMINED THAT THIS
PROSPECTUS  SUPPLEMENT  OR  THE ATTACHED PROSPECTUS IS ACCURATE OR COMPLETE. ANY
REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
                ------------------------------------------------

                                       Per Note         Total
                                       --------      -----------
Initial Price to Public                 100.00%      $250,000,000
Underwriting Discount                     0.20%      $    500,000
Proceeds to Us (Before Expenses)         99.80%      $249,500,000

Your purchase price will also include any interest that has accrued on the notes
since November 8, 1999.

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

*    The notes will be delivered  to you in global form  through the  book-entry
     delivery system of The Depository Trust Company on November 8, 1999.

*    The  Underwriters  listed  below will  purchase the notes from us on a firm
     commitment basis and offer them to you, subject to certain conditions.

Chase Securities Inc.
                           Credit Suisse First Boston
                                                            Salomon Smith Barney

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

           The date of this Prospectus Supplement is November 2, 1999.

In making your  investment  decision,  you should  rely only on the  information
contained or  incorporated  by reference in this  Prospectus  Supplement and the
attached Prospectus. We have not authorized anyone to provide you with any other
information.  If you receive any unauthorized information,  you must not rely on
it.

We are offering to sell the notes in places where sales are permitted.

You  should  not  assume  that the  information  contained  or  incorporated  by
reference in this Prospectus  Supplement or the attached  Prospectus is accurate
as of any date other than its respective date.

                                   ----------

                                TABLE OF CONTENTS


                                                                            Page
                                                                            ----
                              PROSPECTUS SUPPLEMENT

Application of Proceeds....................................................  S-3
Description of the Notes...................................................  S-3
Recent Developments........................................................  S-5
Underwriting...............................................................  S-5

                                   PROSPECTUS

Available Information......................................................    2
Incorporation of Certain Documents by Reference............................    2
Selected Information.......................................................    3
The Company................................................................    4
Application of Proceeds....................................................    4
Earnings Ratios............................................................    4
Securities.................................................................    4
Description of New Bonds...................................................    4
Description of Senior Notes................................................    9
Description of Debt Securities.............................................   18
Plan of Distribution.......................................................   26
Experts....................................................................   27
Legal Opinions.............................................................   27

                                       S-2

                             APPLICATION OF PROCEEDS

     We will use the net proceeds from the sale of the notes for:

     *    the repayment of floating rate short-term  borrowings incurred for (i)
          the payment of $100 million of our maturing  First  Mortgage  Bonds, 7
          5/8% Series due June 15, 1999; (ii) the repayment in April 1999 of $25
          million  of  floating  rate  long-term  bank  debt due June  2003 then
          bearing  interest at  approximately  5.3%;  and (iii) working  capital
          purposes.  The  estimated  average  interest  rate  of the  short-term
          borrowings to be retired is 5.5%.

     *    the repayment of $50 million of floating rate  long-term bank debt due
          June 2003 currently  bearing  interest at an average  interest rate of
          approximately 5.6%.

     Until we are able to use the  proceeds for these  purposes,  we will invest
the proceeds  temporarily  in United States  government  or agency  obligations,
commercial  paper,  bank  certificates  of  deposit,  or  repurchase  agreements
collateralized by United States government or agency obligations, or deposit the
proceeds with banks.

                            DESCRIPTION OF THE NOTES

     A Global  Security will initially  represent the notes. We will deposit the
Global  Security  with  or on  behalf  of  The  Depository  Trust  Company.  See
"Description of Debt Securities -- Global Securities" in the Prospectus.  We may
allow exchange of the Global  Security for registered  notes and transfer of the
Global Security to a person other than DTC in additional  circumstances  that we
agree to other than those described under that heading.

PRINCIPAL AMOUNT,  MATURITY AND INTEREST  RELATING TO THE FLOATING RATE NOTES

     We are issuing $250,000,000 of our floating rate notes which will mature on
November 15,  2001.  The  floating  rate notes will bear  interest at LIBOR plus
0.72%.

     We will pay interest quarterly in arrears on February 15, May 15, August 15
and  November  15 of each year  (each an  "interest  payment  date"),  beginning
February 15, 2000,  and on the maturity  date. If any of the quarterly  interest
payment  dates listed  above falls on a day that is not a business  day, we will
postpone the interest  payment date to the next  succeeding  business day unless
that business day is in the next  succeeding  calendar  month, in which case the
interest payment date will be the immediately  preceding  business day. Interest
on the  floating  rate notes will be computed on the basis of a 360 day year for
the actual number of days elapsed.

     Interest  on the  floating  rate notes will  accrue  from,  and  including,
November 8, 1999,  to, and excluding,  the first interest  payment date and then
from, and including,  the immediately  preceding  interest payment date to which
interest has been paid or duly provided for to, but excluding, the next interest
payment date or the maturity  date, as the case may be. We will refer to each of
these  periods as an "interest  period." You can calculate the amount of accrued
interest that we will pay for any interest period by multiplying the face amount
of the floating  rate notes by the  interest  rate  applicable  for the interest
period  divided by 360 days and multiplied by the number of days in the interest
period.

     If the maturity  date of the floating rate notes falls on a day that is not
a business  day,  we will pay  principal  and  interest  on the next  succeeding
business  day, but we will  consider that payment as being made on the date that
the payment was due to you. Accordingly,  no interest will accrue on the payment
for the period from and after the maturity  date to the date we make the payment
to you on the next succeeding business day.

     We will pay the  interest  payable  for any  interest  payment  date to the
person in whose  name the note is  registered  at the close of  business  on the
fifteenth calendar day, whether or not a business day, immediately preceding the
interest payment date.  However, we will pay interest on the maturity date or on
a redemption date to the person to whom the principal will be payable.

                                       S-3

     When we use the term "business  day," we mean any day except a Saturday,  a
Sunday or a legal holiday in The City of New York on which banking  institutions
are  authorized  or required by law,  regulation  or  executive  order to close;
provided,  that the day is also a London  business  day.  "London  business day"
means any day on which  dealings in United States  dollars are transacted in the
London interbank market.

     The calculation  agent appointed by us, initially The Chase Manhattan Bank,
will  calculate the interest rate on the floating rate notes.  The interest rate
will be equal to LIBOR plus 0.72%.  The  interest  rate in effect for the period
from  November 8, 1999 to February 15, 2000,  the initial  interest  reset date,
will be LIBOR,  as determined on November 4, 1999,  plus 0.72%.  The calculation
agent will reset the interest rate on each interest  payment date, each of which
we will refer to as an  "interest  reset date." The second  London  business day
preceding an interest reset date will be the "interest  determination  date" for
that interest reset date. The interest rate in effect on each day that is not an
interest  reset date will be the  interest  rate  determined  as of the interest
determination date pertaining to the immediately  preceding interest reset date.
The  interest  rate in effect on any day that is an interest  reset date will be
the interest rate determined as of the interest determination date pertaining to
that interest reset date, except that the interest rate in effect for the period
from and including November 8, 1999 to the first interest reset date will be the
initial interest rate.

     The  calculation  agent  will  determine  "LIBOR"  in  accordance  with the
following provisions:

          (i) With respect to any interest determination date, LIBOR will be the
     rate for  deposits  in United  States  dollars  having a maturity  of three
     months  commencing on the first day of the applicable  interest period that
     appears  on  Telerate  Page 3750 as of 11:00  A.M.,  London  time,  on that
     interest determination date. If no rate appears,  LIBOR, in respect to that
     interest  determination  date,  will be determined  in accordance  with the
     provisions described in (ii) below.

          (ii) With respect to an interest  determination  date on which no rate
     appears on Telerate Page 3750, as specified in (i) above,  the  calculation
     agent  will  request  the  principal  London  offices of each of four major
     reference  banks  in  the  London  interbank  market,  as  selected  by the
     calculation  agent,  to provide  the  calculation  agent  with its  offered
     quotation  for  deposits in United  States  dollars for the period of three
     months,  commencing on the first day of the applicable  interest period, to
     prime banks in the London  interbank  market at  approximately  11:00 A.M.,
     London time, on that interest  determination date and in a principal amount
     that is representative for a single transaction in United States dollars in
     that market at that time. If at least two  quotations  are  provided,  then
     LIBOR on that interest  determination  date will be the arithmetic  mean of
     those quotations.  If fewer than two quotations are provided, then LIBOR on
     the interest  determination  date will be the arithmetic  mean of the rates
     quoted  at  approximately  11:00  A.M.,  in The  City of New  York,  on the
     interest  determination  date by three  major banks in The City of New York
     selected by the  calculation  agent for loans in United  States  dollars to
     leading  European banks,  having a three-month  maturity and in a principal
     amount that is  representative  for a single  transaction  in United States
     dollars in that market at that time; provided,  however,  that if the banks
     selected  by the  calculation  agent are not  providing  quotations  in the
     manner  described by this  sentence,  LIBOR  determined as of that interest
     determination  date will be LIBOR in effect on that interest  determination
     date.

     "Telerate Page 3750" means the display  designated as "Page 3750" on Bridge
Telerate,  Inc., or any  successor  service,  for the purpose of displaying  the
London interbank rates of major banks for United States dollars.

REDEMPTION

     We may redeem  all or part of the notes  from time to time on any  interest
payment date on or after  November 15, 2000 at our option at a redemption  price
equal to the principal  amount of the notes to be redeemed plus interest accrued
to the redemption date.

DEFEASANCE

     The provisions  described in the prospectus under the caption  "Description
of Debt Securities -- Defeasance and Covenant  Defeasance" are not applicable to
the notes.

                                       S-4

RANKING

     The notes will constitute a series of our unsecured senior Debt Securities.
Therefore,  the notes will not have the benefit of the  collateral  that secures
our First Mortgage Bonds and our Senior Notes.  As of September 30, 1999, we had
$1.0 billion of outstanding  secured debt. The prospectus that  accompanies this
prospectus  supplement  describes  these different  classes of securities  under
"Description of Debt Securities," "Description of New Bonds" and "Description of
Senior Notes."

                               RECENT DEVELOPMENTS

     On September 21, 1999, the Arizona Corporation  Commission ("ACC") voted to
approve the rules that  provide a  framework  for the  introduction  of electric
retail competition in Arizona. See our Form 8-K Report dated September 21, 1999.
On  October  19,  1999,  several  parties,   including  us,  filed  motions  for
reconsideration of the rules with the ACC. The ACC has twenty days to respond to
the  motions,  after  which time the  motions  are deemed  denied if there is no
response.

     On  September  23, 1999,  the ACC voted to approve a  settlement  agreement
between us and various other  parties.  See our Form 8-K Report dated  September
21, 1999. On October 25, 1999, two parties filed motions for  reconsideration of
the  settlement  agreement  with the ACC.  The ACC has twenty days to act on the
motion and if no action is taken,  the motion is deemed  denied.  We continue to
operate under the terms of the settlement agreement.

                                  UNDERWRITING

     We and  the  underwriters  have  entered  into  an  underwriting  agreement
relating to the offering and sale of the notes (the  "underwriting  agreement").
In the underwriting agreement,  we have agreed to sell to each underwriter,  and
each  underwriter has agreed to purchase from us, the principal  amount of notes
that appears opposite its name in the table below:

                      Underwriter                               Principal Amount
                      -----------                                 ------------
Chase Securities Inc..........................................    $125,000,000
Credit Suisse First Boston Corporation........................      62,500,000
Salomon Smith Barney Inc......................................      62,500,000
                                                                  ------------
   Total......................................................    $250,000,000
                                                                  ============

     The  obligations  of the  underwriters  under the  underwriting  agreement,
including  their agreement to purchase notes from us, are several and not joint.
These  obligations  are also subject to certain  conditions in the  underwriting
agreement being satisfied.  The underwriters  have agreed to purchase all of the
notes if any of them are purchased.

     The  underwriters  have  advised us that they propose to offer the notes to
the public at the public  offering  price that appears on the cover page of this
prospectus supplement.  The underwriters may offer the notes to selected dealers
at the public  offering  price minus a selling  concession  of up to .10% of the
principal  amount.  In addition,  the underwriters may allow, and those selected
dealers may reallow, a selling concession of up to .075% of the principal amount
to certain other dealers.  After the initial public  offering,  the underwriters
may change the public offering price and any other selling terms.

     In the underwriting agreement, we have agreed that:

          *    we will  pay our  expenses  related  to this  offering,  which we
               estimate will be $325,000; and

          *    we will indemnify the underwriters  against certain  liabilities,
               including liabilities under the Securities Act of 1933.

     The  notes  are a new  issue  of  securities,  and  there is  currently  no
established trading market for the notes. In addition, we do not intend to apply
for the notes to be listed on any securities exchange

                                       S-5

or to  arrange  for  the  notes  to be  quoted  on  any  quotation  system.  The
underwriters have advised us that they intend to make a market in the notes, but
they are not obligated to do so. The  underwriters  may  discontinue  any market
making in the notes at any time in their sole discretion. Accordingly, we cannot
assure you that a liquid  trading  market will  develop for the notes,  that you
will be able to sell your notes at a particular time or that the prices that you
receive when you sell will be favorable.

     In connection with the offering of the notes,  the  underwriters may engage
in overallotment,  stabilizing  transactions and syndicate covering transactions
in accordance  with  Regulation M under the Securities  Exchange Act of 1934, as
amended.  Overallotment  involves  sales in excess of the offering  size,  which
creates a short position for the underwriters.  Stabilizing transactions involve
bids to purchase the notes in the open market for the purpose of pegging, fixing
or maintaining the price of the notes.  Syndicate covering  transactions involve
purchases  of the  notes in the open  market  after  the  distribution  has been
completed  in order to  cover  short  positions.  Stabilizing  transactions  and
syndicate  covering  transactions  may cause the price of the notes to be higher
than  it  would  otherwise  be in the  absence  of  those  transactions.  If the
underwriters engage in stabilizing or syndicate covering transactions,  they may
discontinue them at any time.

     Certain of the underwriters and their affiliates  engage in various general
financing and banking  transactions  with us, our  affiliates  and our parent or
perform services for us, our affiliates and our parent. In particular, The Chase
Manhattan  Bank,  an affiliate of Chase  Securities  Inc., is a lender to us and
will  receive a portion of the  amounts  repaid by us with the  proceeds  of the
offering.  The Chase  Manhattan  Bank is also the  trustee for the notes and our
secured lease obligation  bonds.  Another  affiliate of Chase Securities Inc. is
the owner participant under one of our nuclear sale and leaseback transactions.

                                       S-6

                         ARIZONA PUBLIC SERVICE COMPANY

                              FIRST MORTGAGE BONDS
                                  SENIOR NOTES
                                 DEBT SECURITIES

                                   ----------

     Arizona Public Service Company (the "Company") intends from time to time to
issue up to $275,000,000  aggregate principal amount of its first mortgage bonds
(the "New  Bonds"),  senior  notes  (the  "Senior  Notes"),  or  unsecured  debt
securities ("Debt Securities") (collectively,  the "Securities"), in one or more
series at prices and on terms to be determined at the time of sale.

     Until the Release Date (see "Description of Senior  Notes--Release  Date"),
the  Senior  Notes will be  secured  by one or more  series of New  Bonds.  As a
result,  when the Company  issues  Senior  Notes,  the Company will issue a like
amount of New Bonds to the Senior Note Trustee (as defined herein) to secure the
newly-issued  Senior Notes.  See  "Description of Senior  Notes--Security".  The
Company  may also issue New Bonds  directly  to  purchasers  or  through  agents
designated from time to time by the Company (see "Description of New Bonds"). As
of  September  30,  1999 (i) the Senior Note  Trustee  held $84 million of first
mortgage  bonds as collateral  for $84 million of  outstanding  senior notes and
(ii)  approximately $954 million of additional first mortgage bonds (i.e., first
mortgage  bonds that do not secure  Senior  Notes) were  outstanding.  Until the
Release Date,  the  Company's  senior notes  (including  the Senior Notes issued
pursuant to this Prospectus) will effectively rank pari passu with the Company's
outstanding first mortgage bonds.

     For each issue of Securities for which this  Prospectus is being  delivered
(the  "Offered  Bonds,"  the  "Offered  Senior  Notes,"  or  the  "Offered  Debt
Securities"  and,  collectively,  the  "Offered  Securities"),  there will be an
accompanying  Prospectus  Supplement  (the  "Prospectus  Supplement")  that sets
forth,   without  limitation  and  to  the  extent   applicable,   the  specific
designation,  aggregate principal amount,  denomination,  maturity,  premium, if
any, rate of interest  (which may be fixed or variable) or method of calculation
thereof, time of payment of interest, any terms for redemption, any sinking fund
provisions, any subordination provisions, the initial public offering price, the
names of any  underwriters  or agents,  the  principal  amounts,  if any,  to be
purchased by the underwriters,  the compensation of such underwriters or agents,
and any other special terms of the Offered Securities. The Prospectus Supplement
relating  to any  series of Offered  Securities  will also  contain  information
concerning  certain  United  States  federal  income  tax   considerations,   if
applicable to the Offered Securities.

     The Company may sell  Securities  directly to purchasers or through  agents
designated  from time to time by the Company or to or through  underwriters or a
group of underwriters which may be managed by one or more  underwriters.  If any
agents of the Company or any underwriters are involved in the sale of Securities
in respect of which this Prospectus is being delivered, the names of such agents
or underwriters  and any applicable  commission or discount will be set forth in
the applicable Prospectus  Supplement.  The net proceeds to the Company from the
sale of Securities  will be the public  offering price of such  Securities  less
such  discount,  in the  case of an  offering  through  an  underwriter,  or the
purchase  price  of such  Securities  less  such  commission,  in the case of an
offering through an agent, and less, in each case, other expenses of the Company
associated   with   the   issuance   and   distribution   of  such   Securities.

                                   ----------

    THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES
       AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS
         THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES
             COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS
                 PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY
                             IS A CRIMINAL OFFENSE.

                                   ----------

                 The date of this Prospectus is November 2, 1999

                              AVAILABLE INFORMATION

     Arizona  Public  Service   Company  (the   "Company")  is  subject  to  the
informational  requirements  of the Securities  Exchange Act of 1934, as amended
(the "1934 Act"), and in accordance  therewith files reports,  proxy statements,
and  other  information  with  the  Securities  and  Exchange   Commission  (the
"Commission").  Such reports,  proxy  statements,  and other  information can be
obtained at prescribed rates from the Public Reference Section of the Commission
or may be inspected and copied at the public reference facilities  maintained by
the Commission at 450 Fifth Street, N.W., Washington,  D.C. 20549 and at certain
of its regional offices located at 500 West Madison Street, Suite 1400, Chicago,
Illinois  60661;  and Seven World Trade Center,  Suite 1300,  New York, New York
10048. In addition, such material may be accessed electronically by means of the
Commission's Web Site on the Internet at http://www.sec.gov.  Certain securities
of the  Company  are  listed  on the New York  Stock  Exchange.  Reports,  proxy
materials,  and other information concerning the Company can be inspected at the
office of this exchange at 20 Broad Street, 7th Floor, New York, New York 10005.

                                   ----------

                 INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

     The following documents previously filed with the Commission by the Company
(File No. 1-4473) are incorporated by reference in this Prospectus:

     1. The  Company's  Form 10-K Report for the fiscal year ended  December 31,
1998 (the "1998 10-K Report");

     2. The Company's  Form 10-Q Reports for the fiscal  quarters ended March 31
and June 30, 1999;

     3. The Company's  Form 8-K Reports  dated January 11,  February 18, May 14,
August 26 and September 21, 1999 (the "September 8-K Report").

     All documents filed by the Company  pursuant to Sections 13(a),  13(c), 14,
or 15(d) of the 1934 Act after the filing date of the  September  8-K Report and
prior to the termination of the offering of the securities  offered hereby shall
be deemed to be  incorporated  by reference in this  Prospectus and to be a part
hereof from the date of filing of such documents.

     Any  statement  contained in a document  incorporated  by reference  herein
shall be deemed to be modified or superseded for purposes of this  Prospectus to
the extent that a statement  contained herein or in any other subsequently filed
document which is also  incorporated by reference  herein modifies or supersedes
such  statement.  Any statement so modified or  superseded  shall not be deemed,
except as modified or superseded, to constitute a part of this Prospectus.

     The Company  will provide  without  charge to each  person,  including  any
beneficial owner, to whom a copy of this Prospectus is delivered,  upon the oral
or  written  request  of  such  person,  a copy  of any or all of the  documents
referred to above which have been or may be  incorporated  in this Prospectus by
reference, other than exhibits to such documents. Request for such copies should
be directed to Arizona Public Service Company, Office of the Secretary,  Station
8102, P.O. Box 53999, Phoenix, Arizona 85072-3999, (602) 379-2608.

                                        2

                              SELECTED INFORMATION

     The  following  material is  qualified  in its entirety by reference to the
detailed information and financial statements  incorporated by reference in this
Prospectus.

                                  THE OFFERING

Securities Offered ..........   Up to $275,000,000 of any combination of First
                                Mortgage Bonds, Senior Notes, and Debt
                                Securities.

Application of Proceeds  ....   Except as otherwise described in the Prospectus
                                Supplement, the net proceeds of the Offered
                                Securities will be applied primarily to the
                                redemption, repurchase, repayment, or retirement
                                of outstanding indebtedness and temporary
                                investment pending such application.

                                   THE COMPANY

Business  ...................   Electric utility servicing approximately 799,000
                                customers in an area that includes the entire
                                state of Arizona with the exception of Tucson
                                and about one-half of the Phoenix area.

Generating Fuel Mix (estimated
  for the nine months ended
  September 30, 1999) .......   Coal -- 44.8%; Nuclear -- 36.9%; Purchases --
                                13.1%; Gas and Other -- 5.2%.

FINANCIAL DATA (THOUSANDS OF DOLLARS):



                                                   Twelve Months Ended
                                     -------------------------------------------------
                                                             December 31,
                                    September 30, ------------------------------------
                                       1999(1)       1998         1997         1996
                                     ----------   ----------   ----------   ----------
                                                                
Electric Operating Revenues ......   $2,236,447   $2,006,398   $1,878,553   $1,718,272
                                     ==========   ==========   ==========   ==========
Income Before Extraordinary Charge   $  270,779          N/A          N/A          N/A
                                     ==========   ==========   ==========   ==========
Net Income .......................   $  130,894   $  255,247   $  251,493   $  243,471
                                     ==========   ==========   ==========   ==========
Ratio of Earnings to Fixed Charges         2.08         3.19         3.07         2.84


CAPITALIZATION DATA (THOUSANDS OF DOLLARS):



                                                    As of          As Adjusted(2)
                                                 September 30, -----------------------
                                                   1999(1)       Amount     Percentage
                                                  ----------   ----------   ----------
                                                                   
Total Debt (including current maturities) .....   $2,150,304   $2,150,304         52.6%
Preferred Stock ...............................            0            0          0.0
Common Stock Equity ...........................    1,940,196    1,940,196         47.4
                                                  ----------   ----------   ----------
  Total Capitalization ........................   $4,090,500   $4,090,500        100.0%
                                                  ==========   ==========   ==========

- ----------
(1)  Financial  information  as of September  30, 1999 is unaudited  but, in the
     judgment of the Company's  management,  contains all necessary  adjustments
     for a fair  presentation  of the financial  position of the Company on such
     date and the results of operations for such period.

(2)  It is  assumed  that the net  proceeds  from the  issuance  of the  Offered
     Securities  will be  used  for  the  refinancing  of a  similar  amount  of
     outstanding long-term and short-term debt.

                                        3

                                   THE COMPANY

     The  Company  was  incorporated  in 1920 under the laws of  Arizona  and is
principally  engaged  in  providing  electricity  in the State of  Arizona.  The
principal  executive  offices of the  Company  are  located  at 400 North  Fifth
Street, Phoenix, Arizona 85004 and its telephone number is (602) 250-1000.

                             APPLICATION OF PROCEEDS

     Except  as  otherwise  described  in the  Prospectus  Supplement,  the  net
proceeds of the Offered  Securities will be applied primarily to the redemption,
repurchase,  repayment, or retirement of outstanding indebtedness.  Any proceeds
not  immediately so applied when received may be invested  temporarily,  pending
such application, in United States government or agency obligations,  commercial
paper, bank certificates of deposit, or repurchase agreements  collateralized by
United States government or agency obligations, or will be deposited with banks.

                                 EARNINGS RATIOS

     The following table sets forth the Company's  historical  ratio of earnings
to fixed charges for each of the indicated periods:

                               Twelve months ended
- --------------------------------------------------------------------------------
                                             December 31,
September 30,       ------------------------------------------------------------
    1999            1998          1997          1996          1995          1994
- -------------       ----          ----          ----          ----          ----
    2.08            3.19          3.07          2.84          2.77          2.96

     For the purposes of these  computations,  "earnings" are defined as the sum
of pre-tax income plus fixed charges of the Company and its subsidiaries; "fixed
charges"  consist of interest on debt,  amortization of debt discount,  premium,
and expense and an estimated interest factor in rentals.

                                   SECURITIES

     The  Securities  may be issued in one or more series as (i) first  mortgage
bonds ("New Bonds"), (ii) notes secured until the Release Date by New Bonds and,
thereafter (see "Description of Senior Notes -- Release Date"),  being unsecured
notes (such notes are herein referred to as "Senior Notes"),  or (iii) unsecured
debt  securities  ("Debt  Securities").  From and after the  "Release  Date" (as
defined below),  any  outstanding  Senior Notes secured by New Bonds when issued
will cease to be secured and will become  unsecured  obligations of the Company.
The New Bonds are described below under the caption  "Description of New Bonds,"
the Senior Notes are described  below under the caption  "Description  of Senior
Notes,"  and  the  Debt   Securities  are  described  below  under  the  caption
"Description of Debt Securities."

                            DESCRIPTION OF NEW BONDS

GENERAL

     The New Bonds may be issued in one or more new  series  under the  Mortgage
and Deed of Trust  dated as of July 1, 1946  between the Company and The Bank of
New York, as successor Trustee ("Bond Trustee"), which as heretofore amended and
supplemented is herein referred to as the "Mortgage," and which is to be further
amended  and  supplemented  by  appropriate   Supplemental   Indentures   ("Bond
Supplemental Indentures"). The following summary does not purport to be complete
and is subject in all  respects to the  provisions  of, and is  qualified in its
entirety by reference to, the Mortgage, the New Bonds, and the Bond Supplemental
Indentures,  the forms of which are filed,  or will be filed, as exhibits to the
registration   statement  of  which  this  Prospectus  forms  a  part.  Whenever
particular  provisions or defined terms in such documents are referred to herein
or in a Prospectus Supplement, such provisions or defined terms are incorporated
by reference herein or therein, as the case may be.

                                        4

     Reference is made to the Prospectus  Supplement  relating to any particular
issue of Offered Bonds for the  following  terms:  (1) the  aggregate  principal
amount of the Offered  Bonds;  (2) the date on which such Offered  Bonds mature;
(3) the rate per annum at which such Offered Bonds will bear  interest;  (4) the
times at which such interest will be payable;  (5) the date, if any, after which
such  Offered  Bonds  may be  redeemed  at the  option  of the  Company  and the
redemption  price;  (6)  whether any of such  Offered  Bonds will be issuable in
whole or in part in the form of one or more  Global  Securities  and, if so, the
Depositaries for such Global Securities, the form of any legend or legends to be
borne by any such Global Security,  and any  circumstances  under which any such
Global  Security  may be  exchanged  in  whole  or in part  for  Offered  Bonds,
registered  in the names of persons  other than the  Depositary  for such Global
Security or its nominee; and (7) any other special terms.  Interest will be paid
to the person in whose name the  Offered  Bonds are  registered  at the close of
business on the record date, as established in the Bond  Supplemental  Indenture
relating  thereto,  preceding the interest payment date in respect thereof.  The
New  Bonds  will be  issued  as fully  registered  bonds,  without  coupons,  in
denominations  of  $1,000  and  multiples   thereof.   The  New  Bonds  will  be
transferable  at any time without any service or other charge,  except  transfer
taxes and other governmental charges, if any.

     Except as otherwise  described under the heading  "Description of New Bonds
- -- Issuance of Additional Bonds" or in the Prospectus Supplement,  the covenants
contained in the Mortgage and the New Bonds would not afford  holders of the New
Bonds protection in the event of a  highly-leveraged  transaction  involving the
Company.

REDEMPTION

     The Offered Bonds are redeemable as set forth in the Prospectus  Supplement
relating thereto and, subject to any  qualifications  or variations set forth in
any such Prospectus Supplement,  are also subject to redemption, in each case at
the principal  amount of the Offered Bonds to be redeemed  together with accrued
interest  to the date  fixed  for  redemption,  (i) in whole or in part with the
proceeds from  mortgaged  property of the Company taken under eminent domain by,
or otherwise  sold to, a governmental  body or agency;  (ii) in whole or in part
with the  Proceeds of Released  Property,  including  proceeds  from the sale or
other disposition (including a sale and leaseback) of property released from the
lien of the  Mortgage  as  specified  in  section  (b) of the second to the last
paragraph under the heading  "Description of New Bonds -- Security"  below;  and
(iii) in whole, together with all other first mortgage bonds of the Company then
outstanding,  within  twelve  months of certain  mergers  or other  transactions
involving the transfer of substantially  all of the property subject to the lien
of the Mortgage,  as then amended. In addition,  after the date and at the price
set forth in the Prospectus  Supplement,  Offered Bonds may be redeemed in whole
or in part with cash deposited in the replacement fund discussed below.

SECURITY

     The New Bonds  will  rank pari  passu,  except  as to any  sinking  fund or
similar  fund  provided  for a  particular  series,  with all  bonds at any time
outstanding under the Mortgage.  The Mortgage  constitutes a first mortgage lien
on  substantially  all the fixed  property  owned by the Company (which does not
include a combined cycle plant or certain  interests in Unit 2 of the Palo Verde
Nuclear  Generating  Station being  leased),  other than  property  specifically
excepted by the Mortgage.  Such lien and the  Company's  title to certain of its
properties  are  subject to Excepted  Encumbrances,  to minor  leases,  defects,
irregularities, and deficiencies, and to the considerations discussed below with
respect to the Four Corners and Navajo Plant locations. The lien of the Mortgage
will  also  extend  to all  after-acquired  property  (other  than the  excepted
classes)  located in the  jurisdictions  in which the necessary  recordations or
filings have been  accomplished,  subject to Excepted  Encumbrances and to liens
existing  or  placed  on such  property  at the time of its  acquisition  by the
Company.

     Both the Four Corners and the Navajo Plants are located on property held by
the plant participants under leases from the Navajo Tribe and easements from the
Secretary of the  Interior.  The leases extend from their  respective  effective
dates in 1966 and 1969 for terms of 50 years with rights of renewal for up to 25
additional  years.  The easements are for 50-year terms from the same  effective
dates.  While the Company owns the rights  conferred  upon it by the leases from
the Navajo Tribe, the Company does not

                                        5

make any representation with respect to the Tribe's interest in the lands leased
(but is not aware of any assertion of a contesting  claim to such lands) or with
respect to the enforceability of the leases against the Tribe.

     The Mortgage requires the Company to keep the property  encumbered  thereby
as an operating  system or systems in good repair and working order, but permits
the  permanent  discontinuance  or reduction in capacity of any such  properties
which, in the judgment of the Board of Directors of the Company, is desirable in
the conduct of its  business or which is ordered by a  regulatory  authority  or
which properties are to be sold or disposed of by the Company.

     When not in default under the Mortgage,  the Company may obtain the release
from the lien thereof of (a) property that has become  unserviceable,  obsolete,
or unnecessary  for use in the Company's  operations,  provided that it replaces
such  property  with,  or  substitutes  for the  same,  an equal  value of other
property,  and (b) other  property that has been sold or otherwise  disposed of,
provided  that the Company  deposits  with the Bond  Trustee  cash in an amount,
waives  the  right  to issue  additional  bonds on the  basis of  retired  bonds
previously issued in an amount,  or utilizes as a credit net Property  Additions
acquired by the Company  within the preceding five years and having a fair value
(not more than Cost), equal to the fair value of the property to be released.

     The Bond Trustee may,  and upon  request of the Company  shall,  cancel and
discharge  the lien of the  Mortgage  and all  indentures  supplemental  thereto
whenever all indebtedness secured by the Mortgage has been paid.

ISSUANCE OF ADDITIONAL BONDS

     Additional  bonds may be issued  under the  Mortgage in a principal  amount
equal to (a) 60% of net Property Additions,  (b) the principal amount of certain
redeemed or retired bonds previously issued, and/or (c) deposited cash, provided
that the Company's Adjusted Net Earnings over a twelve-month period are at least
two times the annual interest on all bonds to be outstanding  under the Mortgage
after the issuance and on  indebtedness  secured by prior liens.  Exceptions  to
this  earnings  coverage  requirement  apply to  bonds  issued  on the  basis of
redeemed or retired bonds where the redeemed or retired bonds bore a higher rate
of interest and where certain other conditions are satisfied.  In addition,  the
Company's  articles  of  incorporation  allow the  Company  to issue  additional
preferred stock when certain earnings coverage  requirements are met. Exceptions
to this earnings  coverage  requirement  apply to preferred stock issued for the
purpose of redeeming or retiring other preferred stock.

     As of September 30, 1999,  the Company  estimates that the Mortgage and the
articles  of  incorporation  would  have  allowed  the  Company  to  issue up to
approximately  $2.34 billion and $.73 billion of additional first mortgage bonds
and preferred stock, respectively.

     In addition  to the  Mortgage  restrictions  on the  Company's  issuance of
additional  bonds,  the Company must obtain ACC approval  before  issuing equity
securities or incurring long-term debt. Existing ACC orders allow the Company to
have  approximately  $501 million in aggregate par value of preferred  stock and
approximately  $2.6 billion in principal amount of long-term debt outstanding at
any one time. The Company does not expect these provisions or  authorizations to
limit the Company's ability to meet its capital requirements.

     Property  Additions,  and in many instances  redeemed or retired bonds,  as
well as deposited cash, may be used for certain  alternative  purposes under the
Mortgage,  including  the  release  of  property  from the lien  thereof  or the
satisfaction of sinking or replacement fund requirements.  The Mortgage contains
restrictions  on the  issuance  of bonds,  withdrawal  of cash,  or  release  of
property on the basis of property  subject to prior liens.  Property  located on
leaseholds or easements  (as, for example,  the Four Corners and Navajo  Plants)
will constitute  fundable Property Additions if the leasehold or easement has an
unexpired  term of, or the term is extendable  at the  Company's  option for, at
least 30 years after the time of funding,  or if the  property may be removed by
the Company without compensation.

REPLACEMENT FUND

     So long as any of the New Bonds are  outstanding,  the  Company is required
for each calendar  year to deposit with the Bond Trustee cash in a  formularized
amount related to net additions to the Company's

                                        6

mortgaged utility plant; however, the Company may satisfy all or any part of the
requirement by utilizing redeemed or retired bonds, net Property  Additions,  or
property retirements.  For 1998, such requirement amounted to approximately $138
million.  Any  cash  that  may be  deposited  by  the  Company  pursuant  to the
requirement  may, upon request by the Company,  be applied to the  redemption or
purchase of bonds and, if not withdrawn  against  Property  Additions or retired
bonds  within  five  years,  must be so  applied,  subject  in each  case to any
restrictions  on any such  redemption or purchase as set forth in the Prospectus
Supplement relating to the issue of bonds to be redeemed or purchased.

EVENTS OF DEFAULT

     The  following  are  defaults  under the  Mortgage:  (a) failure to pay the
principal of any bond outstanding  under the Mortgage when due and payable;  (b)
failure to pay interest on any bond  outstanding  under the  Mortgage  within 60
days after the same is due and payable;  (c) failure to pay any  installment  of
any  fund  required  to be  applied  to the  purchase  or  redemption  of  bonds
outstanding under the Mortgage within 60 days after the same is due and payable;
(d) certain events in bankruptcy, insolvency, or reorganization; and (e) failure
to perform  any other  covenant  of the  Mortgage  continuing  for 90 days after
notice by the Bond  Trustee or holders of 15% in  principal  amount of  Eligible
bonds.  The  Mortgage  allows  the Bond  Trustee to  withhold  notice of certain
defaults,  not including any default in the payment of principal of, or interest
on,  any  bond  outstanding,  or in the  payment  of any  sinking,  improvement,
replacement,  or purchase fund installment,  if it in good faith determines that
the withholding of such notice is in the interests of the bondholders.

     The  holders of not less than a majority  in  principal  amount of Eligible
bonds may direct the time,  method,  and place of conducting  any proceeding for
any remedy available to the Bond Trustee under the Mortgage;  provided, however,
that the Bond  Trustee may decline to follow any such  direction  under  certain
circumstances,  including a determination made in good faith by the Bond Trustee
that it will not be sufficiently indemnified for any expenditures, including its
own charges, in any action or proceeding so directed. The Company is required to
file with the Bond Trustee,  on or before July 1 of each year, a certificate  to
the effect that,  except as otherwise  stated therein,  the Company has complied
with  all of the  provisions  of  the  Mortgage  and  is  not  then  in  default
thereunder.

MODIFICATION OF THE MORTGAGE

     The Mortgage and the rights of bondholders may be modified with the consent
of the  Company,  and of the Bond  Trustee if deemed  affected,  and the vote or
assent of the holders of not less than 70% in  principal  amount of the Eligible
bonds, and of not less than 70% in principal amount of the Eligible bonds of any
one or more series  (less than all)  affected by any such  modification;  except
that the  bondholders,  without the consent of the holder of each bond affected,
have no power to (a) reduce the principal  thereof,  or the premium,  if any, or
rate of interest  thereon or otherwise modify the terms of payment of principal,
premium,  or  interest,  or extend the  maturity  of any  bonds,  (b) permit the
creation  of any  lien  ranking  prior  to or on a  parity  with the lien of the
Mortgage  with  respect  to any of  the  mortgaged  property,  (c)  deprive  any
nonassenting  bondholder of a lien upon the mortgaged  property for the security
of his or her bonds,  or (d) reduce the percentage of bondholders  authorized to
effect any such modification.

GLOBAL SECURITIES

     Some or all of the New Bonds of any series may be represented,  in whole or
in  part,  by one or more  "Global  Securities"  which  will  have an  aggregate
principal amount equal to that of the New Bonds represented thereby. Each Global
Security will be  registered  in the name of a depositary  or a nominee  thereof
identified in the applicable Prospectus Supplement,  will be deposited with such
depositary or nominee or a custodian  therefor and will bear a legend  regarding
the  restrictions on exchanges and  registration of transfer thereof referred to
below  and any  such  other  matters  as may be  provided  for  pursuant  to the
applicable Bond Supplemental Indenture.

     Notwithstanding  any  provision of the  Mortgage or any New Bond  described
herein,  no Global  Security  may be exchanged in whole or in part for New Bonds
registered,  and no  transfer  of a Global  Security  in whole or in part may be
registered, in the name of any person other than the depositary for

                                        7

such Global Security or any nominee of such depositary unless (i) the depositary
has  notified  the  Company  that it is  unwilling  or  unable  to  continue  as
depositary for such Global Security or has ceased to be qualified to act as such
as required by the Mortgage,  (ii) there shall have occurred and be continuing a
default with respect to the New Bonds  represented by such Global  Security,  or
(iii) there shall exist such circumstances, if any, in addition to or in lieu of
those described  above as may be described in the applicable  Bond  Supplemental
Indenture and Prospectus  Supplement.  All  securities  issued in exchange for a
Global  Security or any portion  thereof will be registered in such names as the
depositary may direct.

     As long as the depositary,  or its nominee,  is the registered  holder of a
Global  Security,  the  depositary or such nominee,  as the case may be, will be
considered  the sole owner and holder of such Global  Security and the New Bonds
represented  thereby  for all  purposes  under the New  Bonds and the  Mortgage.
Except in the  limited  circumstances  referred to above,  owners of  beneficial
interests in a Global Security will not be entitled to have such Global Security
or any New Bonds represented thereby registered in their names, will not receive
or be  entitled  to  receive  physical  delivery  of  certificated  New Bonds in
exchange therefor and will not be considered to be the owners or holders of such
Global Security or any New Bonds  represented  thereby for any purpose under the
New Bonds or the  Mortgage.  All  payments of  principal  of and any premium and
interest on a Global Security will be made to the depositary or its nominee,  as
the case may be, as the holder thereof.  The laws of some jurisdictions  require
that certain  purchasers of securities take physical delivery of such securities
in  definitive  form.  These laws may impair the ability to transfer  beneficial
interests in a Global Security.

     Ownership of beneficial  interests in a Global  Security will be limited to
institutions   that  have   accounts   with  the   depositary   or  its  nominee
("participants")  and to  persons  that may hold  beneficial  interests  through
participants.  In  connection  with the  issuance  of any Global  Security,  the
depositary will credit, on its book-entry  registration and transfer system, the
respective  principal amounts of New Bonds represented by the Global Security to
the accounts of its participants.  Ownership of beneficial interests in a Global
Security  will be shown only on, and the transfer of those  ownership  interests
will be effected  only  through,  records  maintained  by the  depositary  (with
respect to  participants'  interests) or any such  participant  (with respect to
interests  of persons  held by such  participants  on their  behalf).  Payments,
transfers,  exchanges,  and other matters relating to beneficial  interests in a
Global Security may be subject to various policies and procedures adopted by the
depositary from time to time. None of the Company, the Bond Trustee or any agent
of the Company or the Bond Trustee will have any responsibility or liability for
any aspect of the depositary's or any participant's  records relating to, or for
payments made on account of, beneficial  interests in a Global Security,  or for
maintaining,  supervising,  or reviewing any records relating to such beneficial
interests.

OTHER

     The  Mortgage  restricts  the payment of  dividends  on common stock of the
Company under certain  conditions  which have not existed in the past and do not
currently exist.

     The Bond Trustee,  security registrar,  and paying agent under the Mortgage
is The Bank of New York. The Company maintains normal banking  arrangements with
The  Bank of New  York,  which  include  (i)  one  commitment  in the  aggregate
principal amount of approximately $15.8 million by The Bank of New York pursuant
to a reimbursement  agreement  related to a letter of credit issued on behalf of
the Company in  connection  with an issuance of  pollution  control  bonds,  the
proceeds of which were made  available to the Company,  and (ii) a $26.6 million
commitment  by The Bank of New York  pursuant to a revolving  credit  agreement,
approximately  $ 6.3 million of which was outstanding at September 30, 1999. The
Bank of New York also serves as (i) trustee for the holders of several issues of
pollution control bonds issued on behalf of the Company,  (ii) trustee under the
Indenture relating to the subordinated Debt Securities (see "Description of Debt
Securities"  below),  (iii) trustee under the Senior Note  Indenture (as defined
below),  (iv)  investment  manager for the  Company's  nonunion  post-retirement
medical fund and (v)  custodian  of  international  fixed-income  assets for the
Company's pension plan.

                                        8

                           DESCRIPTION OF SENIOR NOTES

GENERAL

     The Senior Notes may be issued in one or more new series under an Indenture
(the "Senior Note  Indenture")  between the Company and The Bank of New York, or
any other  trustee to be named,  as Trustee  (the "Senior  Note  Trustee").  The
following summary does not purport to be complete and is subject in all respects
to the  provisions  of, and is qualified  in its  entirety by reference  to, the
Senior Note Indenture pursuant to which the Senior Notes are to be issued and to
the Senior Notes, the forms of which are filed, or will be filed, as exhibits to
the  registration  statement  of which this  Prospectus  forms a part.  Whenever
particular provisions or defined terms in the Senior Note Indenture are referred
to  herein  or  in  a  Prospectus  Supplement,  such  provisions  or  terms  are
incorporated by reference herein or therein, as the case may be.

     Until the Release Date (as defined below), the Senior Notes will be secured
by one or more series of New Bonds  ("Senior  Note Mortgage  Bonds")  issued and
delivered by the Company to the Senior Note Trustee.  See "Description of Senior
Notes -- Security"  and  "Description  of Senior Notes -- Release  Date." On the
Release Date,  the Senior Notes will cease to be secured by Senior Note Mortgage
Bonds,  will become  unsecured  obligations  of the Company,  and will rank on a
parity with other unsecured senior indebtedness of the Company, including senior
Debt  Securities.  The Senior Note  Indenture  provides that, in addition to the
Senior Notes offered hereby,  additional senior notes may be issued  thereunder,
without limitation as to aggregate principal amount, provided that, prior to the
Release  Date,  the amount of senior notes that may be issued  cannot exceed the
amount of first  mortgage  bonds  that the  Company  is able to issue  under its
Mortgage. See "Description of New Bonds -- Issuance of Additional Bonds."

     Reference is made to the Prospectus  Supplement  relating to any particular
issue of Offered  Senior Notes for the  following  terms:  (1) the title of such
Senior  Notes;  (2) any limit on the aggregate  principal  amount of such Senior
Notes or the series of which they are a part; (3) the date or dates on which the
principal of any of such Senior Notes will be payable;  (4) the rate or rates at
which any of such Senior  Notes will bear  interest,  if any,  the date or dates
from which any such  interest will accrue,  the Interest  Payment Dates on which
any such  interest  will be payable  and the  Regular  Record  Date for any such
interest payable on any Interest Payment Date; (5) the place or places where the
principal  of and any premium and  interest on any of such Senior  Notes will be
payable,  if other  than as  described  under  "Description  of Senior  Notes --
Payment and Paying Agents"; (6) the period or periods within which, the price or
prices at which and the terms and  conditions  on which any of such Senior Notes
may be  redeemed,  in whole or in part,  at the option of the  Company;  (7) the
obligation,  if any,  of the  Company to redeem or  purchase  any of such Senior
Notes  pursuant to any sinking fund or  analogous  provision or at the option of
the Holder thereof,  and the period or periods within which, the price or prices
at which and the terms and  conditions on which any of such Senior Notes will be
redeemed or purchased, in whole or in part, pursuant to any such obligation; (8)
the  denominations in which any of such Senior Notes will be issuable,  if other
than  denominations  of $1,000 and any  integral  multiple  thereof;  (9) if the
amount of  principal  of or any premium or interest on any of such Senior  Notes
may be  determined  with  reference  to an index or pursuant  to a formula,  the
manner in which such amounts will be determined; (10) if other than the currency
of the United States of America, the currency,  currencies, or currency units in
which the  principal  of or any premium or interest on any of such Senior  Notes
will be payable  and the manner of  determining  the  equivalent  thereof in the
currency of the United States of America for any purpose, including for purposes
of determining  the principal  amount deemed to be Outstanding at any time; (11)
if the principal of or any premium or interest on any of such Senior Notes is to
be payable, at the election of the Company or the Holder thereof, in one or more
currencies,  or currency  units other than those in which such Senior  Notes are
stated to be  payable,  the  currency,  currencies  or  currency  units in which
payment of any such  amount as to which such  election  is made will be payable,
the periods within which and the terms and  conditions  upon which such election
is to be made and the amount so payable  (or the manner in which such  amount is
to be determined);  (12) if other than the entire principal amount thereof,  the
portion  of the  principal  amount of any of such  Senior  Notes  which  will be
payable upon  declaration of acceleration of the Maturity  thereof;  (13) if the
principal amount payable at the Stated Maturity of any of such Senior Notes will
not be determinable as of any one or more dates prior to the

                                        9

     Stated  Maturity,  the  amount  which  will be deemed to be such  principal
amount as of any such  date for any  purpose,  including  the  principal  amount
thereof  which will be due and payable upon any  Maturity  other than the Stated
Maturity or which will be deemed to be  Outstanding  as of any such date (or, in
any such  case,  the  manner  in which  such  deemed  principal  amount is to be
determined);  (14) if  applicable,  that  such  Senior  Notes,  in  whole or any
specified  part,  are  defeasible  pursuant to the provisions of the Senior Note
Indenture  described  under  "Description  of  Senior  Notes --  Defeasance  and
Covenant Defeasance";  (15) whether any of such Senior Notes will be issuable in
whole or in part in the form of one or more  Global  Securities  and, if so, the
respective  Depositaries for such Global  Securities,  the form of any legend or
legends to be borne by any such Global Security in addition to or in lieu of the
legend referred to under "Description of Senior Notes -- Global Securities" and,
if different from those described under such caption,  any  circumstances  under
which any such Global  Security  may be exchanged in whole or in part for Senior
Notes  registered,  and any transfer of such Global Security in whole or in part
may be  registered,  in the names of Persons other than the  Depositary for such
Global  Security  or its  nominee;  (16) if any of such  Senior  Notes are to be
issued prior to the Release Date,  the  designation of the series of Senior Note
Mortgage  Bonds to be  delivered to the Senior Note Trustee as security for such
Senior Notes; (17) any addition to or change in the Events of Default applicable
to any of such  Senior  Notes and any  change in the  right of the  Senior  Note
Trustee or the  Holders to declare  the  principal  amount of any of such Senior
Notes due and payable;  (18) any  addition to or change in the  covenants in the
Senior  Note  Indenture;  and (19) any  other  terms of such  Senior  Notes  not
inconsistent with the provisions of the Senior Note Indenture. (Section 301).

     Senior Notes,  including  Original Issue Discount  Notes,  may be sold at a
substantial discount below their principal amount. Certain special United States
federal income tax considerations (if any) applicable to Senior Notes sold at an
original  issue   discount  may  be  described  in  the  applicable   Prospectus
Supplement.  In addition,  certain  special  United States federal income tax or
other  considerations  (if  any)  applicable  to  any  Senior  Notes  which  are
denominated  in a currency or currency unit other than United States dollars may
be described in the applicable Prospectus Supplement.

     Except as otherwise described in the Prospectus  Supplement,  the covenants
contained in the Senior Note Indenture  would not afford holders of Senior Notes
protection in the event of a highly-leveraged transaction involving the Company.

FORM, EXCHANGE, AND TRANSFER

     The Senior Notes of each series will be issuable  only in fully  registered
form  without  coupons  and,  unless  otherwise   specified  in  the  applicable
Prospectus  Supplement,  in  denominations  of $1,000 and any integral  multiple
thereof. (Section 302).

     At the  option  of the  Holder,  subject  to the terms of the  Senior  Note
Indenture and the limitations  applicable to Global Securities,  Senior Notes of
any series will be  exchangeable  for other Senior Notes of the same series,  of
any authorized  denomination and of like tenor and aggregate  principal  amount.
(Section 305).

     Subject  to the terms of the  Senior  Note  Indenture  and the  limitations
applicable to Global  Securities,  Senior Notes may be presented for exchange as
provided above or for  registration  of transfer (duly endorsed or with the form
of transfer  endorsed thereon duly executed) at the office of the Note Registrar
or at the  office of any  transfer  agent  designated  by the  Company  for such
purpose.  No service  charge  will be made for any  registration  of transfer or
exchange  of  Senior  Notes,  but  the  Company  may  require  payment  of a sum
sufficient to cover any tax or other  governmental  charge payable in connection
therewith. Such transfer or exchange will be effected upon the Note Registrar or
such transfer  agent,  as the case may be, being satisfied with the documents of
title and identity of the person  making the request.  The Company has appointed
the Senior Note Trustee as Note  Registrar.  Any transfer  agent (in addition to
the Note  Registrar)  initially  designated  by the Company for any Senior Notes
will be  named in the  applicable  Prospectus  Supplement.  (Section  305).  The
Company  may at any time  designate  additional  transfer  agents or rescind the
designation  of any  transfer  agent or approve a change in the  office  through
which any  transfer  agent acts,  except  that the  Company  will be required to
maintain a transfer  agent in each Place of Payment for the Senior Notes of each
series. (Section 1102).

                                       10

     If the Senior  Notes of any series (or of any series and  specified  tenor)
are to be redeemed,  the Company will not be required to (i) issue, register the
transfer  of, or exchange  any Senior Note of that series (or of that series and
specified tenor, as the case may be) during a period beginning at the opening of
business 15 days before the day of mailing of a notice of redemption of any such
Senior  Note that may be  selected  for  redemption  and  ending at the close of
business on the day of such mailing or (ii) register the transfer of or exchange
any Senior  Note so selected  for  redemption,  in whole or in part,  except the
unredeemed  portion of any such  Senior Note being  redeemed  in part.  (Section
305).

GLOBAL NOTES

     Some or all of the Senior Notes of any series may be represented,  in whole
or in part,  by one or more Global Notes which will have an aggregate  principal
amount equal to that of the Senior Notes represented  thereby.  Each Global Note
will be registered in the name of a Depositary or a nominee  thereof  identified
in the applicable Prospectus Supplement,  will be deposited with such Depositary
or  nominee  or a  custodian  therefor  and  will  bear a legend  regarding  the
restrictions on exchanges and registration of transfer thereof referred to below
and any such other  matters as may be provided  for  pursuant to the Senior Note
Indenture.

     Notwithstanding  any  provision of the Senior Note  Indenture or any Senior
Note described  herein,  no Global Note may be exchanged in whole or in part for
Senior  Notes  registered,  and no transfer of a Global Note in whole or in part
may be registered,  in the name of any Person other than the Depositary for such
Global  Note or any nominee of such  Depositary  unless (i) the  Depositary  has
notified the Company  that it is  unwilling or unable to continue as  Depositary
for such Global Note or has ceased to be qualified to act as such as required by
the Senior Note  Indenture,  (ii) there shall have occurred and be continuing an
Event of Default  with respect to the Senior  Notes  represented  by such Global
Note, or (iii) there shall exist such  circumstances,  if any, in addition to or
in  lieu  of  those  described  above  as may  be  described  in the  applicable
Prospectus  Supplement.  All securities  issued in exchange for a Global Note or
any portion  thereof  will be  registered  in such names as the  Depositary  may
direct. (Sections 204 and 305).

     As long as the Depositary,  or its nominee,  is the registered  Holder of a
Global  Note,  the  Depositary  or such  nominee,  as the case  may be,  will be
considered  the sole owner and Holder of such Global  Note and the Senior  Notes
represented  thereby for all purposes under the Senior Notes and the Senior Note
Indenture.  Except in the limited  circumstances  referred  to above,  owners of
beneficial  interests  in a Global Note will not be entitled to have such Global
Note or any Senior Notes represented thereby registered in their names, will not
receive or be entitled to receive physical delivery of certificated Senior Notes
in exchange  therefor and will not be  considered to be the owners or Holders of
such Global Note or any Senior Notes  represented  thereby for any purpose under
the Senior Notes or the Senior Note Indenture.  All payments of principal of and
any premium and interest on a Global Note will be made to the  Depositary or its
nominee,  as  the  case  may  be,  as the  Holder  thereof.  The  laws  of  some
jurisdictions  require that  certain  purchasers  of  securities  take  physical
delivery  of such  securities  in  definitive  form.  These  laws may impair the
ability to transfer beneficial interests in a Global Note.

     Ownership  of  beneficial  interests  in a Global  Note will be  limited to
institutions   that  have   accounts   with  the   Depositary   or  its  nominee
("participants")  and to  persons  that may hold  beneficial  interests  through
participants. In connection with the issuance of any Global Note, the Depositary
will credit, on its book-entry  registration and transfer system, the respective
principal amounts of Senior Notes represented by the Global Note to the accounts
of its participants.  Ownership of beneficial interests in a Global Note will be
shown only on, and the transfer of those  ownership  interests  will be effected
only  through,   records   maintained  by  the   Depositary   (with  respect  to
participants'  interests) or any such participant  (with respect to interests of
persons  held  by such  participants  on  their  behalf).  Payments,  transfers,
exchanges,  and others matters relating to beneficial interests in a Global Note
may be subject to various policies and procedures adopted by the Depositary from
time to time.  None of the Company,  the Senior Note Trustee or any agent of the
Company or the Senior Note Trustee will have any responsibility or liability for
any aspect of the Depositary's or any participant's  records relating to, or for
payments  made on account of,  beneficial  interests  in a Global  Note,  or for
maintaining,  supervising,  or reviewing any records relating to such beneficial
interests.

                                       11

PAYMENT AND PAYING AGENTS

     Unless otherwise indicated in the applicable Prospectus Supplement, payment
of interest on a Senior Note on any  Interest  Payment  Date will be made to the
Person in whose name such Senior Note (or one or more Predecessor  Senior Notes)
is  registered  at the close of  business  on the  Regular  Record Date for such
interest. (Section 307).

     Unless  otherwise  indicated  in  the  applicable  Prospectus   Supplement,
principal  of and any premium and  interest on the Senior  Notes of a particular
series  will be payable at the office of such Paying  Agent or Paying  Agents as
the Company may designate for such purpose from time to time, except that at the
option of the Company payment of any interest may be made by check mailed to the
address  of the Person  entitled  thereto  as such  address  appears in the Note
Register.  Unless otherwise indicated in the applicable  Prospectus  Supplement,
the  corporate  trust  office of the Senior Note Trustee in The City of New York
will be designated as the Company's  sole Paying Agent for payments with respect
to Senior Notes of each series. Any other Paying Agents initially  designated by
the Company  for the Senior  Notes of a  particular  series will be named in the
applicable  Prospectus  Supplement.  The  Company  may  at  any  time  designate
additional  Paying  Agents or rescind  the  designation  of any Paying  Agent or
approve a change in the office through which any Paying Agent acts,  except that
the Company will be required to maintain a Paying Agent in each Place of Payment
for the Senior Notes of a particular series. (Section 1102).

     All moneys  paid by the  Company to a Paying  Agent for the  payment of the
principal  of or any  premium or  interest  on any  Senior  Notes  which  remain
unclaimed at the end of two years after such principal,  premium or interest has
become due and  payable  will be repaid to the  Company,  and the Holder of such
Senior  Notes  thereafter  may look only to the  Company  for  payment  thereof.
(Section 1103).

CONSOLIDATION, MERGER, AND SALE OF ASSETS

     The  Company  may not  consolidate  with or merge into any other  Person or
convey,  transfer  or lease  its  properties  and  assets  "substantially  as an
entirety" to any Person,  and may not permit any Person to  consolidate  with or
merge into the Company or convey,  transfer,  or lease its properties and assets
substantially as an entirety to the Company, unless (a) the successor Person (if
any) is a corporation,  partnership, trust or other entity organized and validly
existing  under  the  laws of any  domestic  jurisdiction  and (i)  assumes  the
Company's  obligations on the Senior Notes and under the Senior Note  Indenture,
and (ii) if such consolidation,  merger,  conveyance,  transfer, or lease occurs
prior to the Release Date,  assumes the Company's  obligations  under the Senior
Note Mortgage Bonds and under the Mortgage;  (b) immediately after giving effect
to the  transaction,  no Event of Default,  and no event which,  after notice or
lapse of time or both, would become an Event of Default, shall have occurred and
be  continuing   and  (iii)  certain   other   conditions   are  met.  The  term
"substantially  as an  entirety"  means 50% or more of the  total  assets of the
Company as shown on the  Company's  consolidated  balance sheet as of the end of
the  calendar  year  immediately  preceding  the day of the year in  which  such
determination is made. (Section 901).

SECURITY

     Until the Release Date (see "Release Date" below), the Senior Notes will be
secured by one or more series of New Bonds ("Senior Note Mortgage Bonds") issued
and delivered by the Company to the Senior Note Trustee (see "Description of New
Bonds").  Upon the  issuance  of a series of Senior  Notes  prior to the Release
Date,  the  Company  will  simultaneously  issue and  deliver to the Senior Note
Trustee,  as security for such series of Senior  Notes,  a series of Senior Note
Mortgage  Bonds that will have the same  stated  rate or rates of  interest  (or
interest calculated in the same manner), Interest Payment Dates, Stated Maturity
and redemption provisions, and will be in the same aggregate principal amount as
the series of the Senior Notes being issued. (Sections 401-403). Payments by the
Company to the Senior Note Trustee of principal  of,  premium and interest on, a
series of Senior Notes will satisfy the  Company's  obligations  with respect to
principal  of,  premium  and  interest  on, the  related  series of Senior  Note
Mortgage Bonds.

                                       12

     Each  series of Senior Note  Mortgage  Bonds will be a series of New Bonds,
all of which are secured by a lien on certain property owned by the Company. See
"Description  of New Bonds -- Security." In certain  circumstances  prior to the
Release Date, the Company is permitted to reduce the aggregate  principal amount
of a series of Senior Note Mortgage  Bonds held by the Senior Note Trustee,  but
in no event to an amount lower than the aggregate  outstanding  principal amount
of the  series of Senior  Notes  initially  issued  contemporaneously  with such
Senior Note Mortgage  Bonds.  (Section  409).  Following  the Release Date,  the
Company  will cause the Mortgage to be closed and the Company will not issue any
additional first mortgage bonds under the Mortgage. (Section 403).

RELEASE DATE

     ON THE RELEASE DATE,  THE SENIOR NOTE MORTGAGE  BONDS WILL NO LONGER SECURE
THE SENIOR NOTES, AND THE SENIOR NOTES WILL BECOME UNSECURED GENERAL OBLIGATIONS
OF THE  COMPANY.  (Section  407).  The  "Release  Date"  means the date that the
Company  has  repaid  all of its  first  mortgage  bonds,  other  than the first
mortgage bonds securing the senior  notes.The  Senior Note Trustee will give the
Senior  Note  Holders  notice  of  the  occurrence  of  the  Release  Date.  See
"Description of Senior Notes -- Defeasance and Covenant Defeasance -- Defeasance
and Discharge" for a discussion of another situation in which outstanding Senior
Notes would not be secured by Senior Note Mortgage Bonds.

     Unless otherwise specified in the applicable  Prospectus  Supplement,  from
and after the Release Date and so long as Senior  Notes of a  particular  series
are  outstanding,  the  Company  may not  issue,  assume or  guarantee  any debt
evidenced by notes,  debentures,  bonds or other  securities  for money borrowed
that is secured by any mortgage,  security  interest,  pledge or lien of or upon
any  operating  property of the  Company,  and will not permit to exist any such
debt secured by any such lien created on or prior to the Release  Date,  without
effectively securing such Senior Notes equally and ratably therewith, subject to
certain  exceptions as described  below.  See "Limitations on Liens and Sale and
Lease-back  Transactions."  The intention of these provisions is that before the
Release Date the Senior  Notes will have the benefit of being  secured by Senior
Note Mortgage  Bonds,  and after the Release Date the Senior Notes will have the
benefit of the same  security  as other  secured  debt of the  Company,  if any,
subject to specified exceptions.

LIMITATIONS ON LIENS AND SALE AND LEASE-BACK TRANSACTIONS

     LIMITATIONS  ON  LIENS.   Unless  otherwise  specified  in  the  applicable
Prospectus  Supplement,  from and after the  Release  Date and so long as Senior
Notes of a particular series are outstanding, the Company may not issue, assume,
or guarantee any debt evidenced by notes, debentures, bonds, or other securities
for money borrowed ("Debt") that is secured by any mortgage,  security interest,
pledge, or lien ("lien") of or upon any Operating  Property of the Company,  and
will not permit to exist any such Debt secured by any such  mortgage  created on
or prior to the Release  Date,  without  effectively  securing such Senior Notes
equally and ratably with such Debt. This restriction does not apply to (1) liens
on any property  existing at the time of its acquisition;  (2) liens on property
of a  corporation  existing  at the  time  the  corporation  is  merged  into or
consolidated  with, or disposes of substantially all of its properties (or those
of a  division)  to, the  Company;  (3)  subject to  certain  conditions,  liens
securing Debt incurred to acquire, construct,  develop, or substantially repair,
alter,  or improve  property or to reimburse the Company for funds spent for any
such  purpose;  (4) liens in favor of the United  States of America or any State
thereof,  or for the benefit of holders of securities issued by any such entity,
or any department,  agency, or instrumentality  or political  subdivision of the
United States of America or any State  thereof,  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 liens; or (5) any extension,  renewal,  or replacement,
in  whole or in part,  of any lien  referred  to in  clauses  (1)  through  (4).
However, the foregoing  restriction does not apply to the issuance,  assumption,
or guarantee  by the Company of Debt secured by a lien which would  otherwise be
subject to the foregoing  restrictions up to an aggregate amount which, together
with all other secured Debt of the Company (not including secured Debt permitted
under the foregoing exceptions) and the Value (as defined below) of

                                       13

all Sale and Lease-Back  Transactions  (as defined below)  existing at such time
(other than Sale and Lease-Back  Transaction proceeds which have been applied to
the  retirement of certain  indebtedness,  Sale and Lease-Back  Transactions  in
which the property  involved would have been permitted to be mortgaged under the
foregoing exceptions and Sale and Lease-Back  Transactions that are permitted by
the first  sentence  of "--  Limitations  on Sale and  Lease-Back  Transactions"
below),  does not exceed the greater of 10% of Net  Tangible  Assets (as defined
below) or 10% of Capitalization (as defined below).

     LIMITATIONS ON SALE AND LEASE-BACK TRANSACTIONS. Unless otherwise specified
in the applicable Prospectus Supplement,  after the Release Date, so long as any
Senior  Notes are  outstanding,  the  Company  may 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  with respect to
any Operating  Property  entered into on or prior to the Release Date (except in
each case, for transactions  involving leases for a term,  including any renewal
thereof,  of not more than 48 months),  if the purchaser's  commitment is or was
obtained  more  than  18  months  after  the  later  of  the  completion  of the
acquisition,  construction  or  development  or the placing in operation of such
Operating Property or of such Operating Property as constructed, being developed
or substantially repaired,  altered or improved. This restriction will not apply
if (a) the Company would be entitled pursuant to the provisions described in the
second  sentence  under  "--  Limitations  on Liens"  above to issue,  assume or
guarantee Debt secured by a lien on such Operating  Property without equally and
ratably  securing  such Senior  Notes,  (b) after giving effect to such Sale and
Lease-Back  Transaction,  the  Company  could incur  pursuant to the  provisions
described in the third sentence under "-- Limitation on Liens,"  additional debt
secured by liens, or (c) the Company applies within 180 days an amount equal to,
in the case of a sale or transfer for cash,  the net proceeds (not exceeding the
net  book  value),  and,  otherwise,  an  amount  equal to the  fair  value  (as
determined by its Board of Directors) of the Operating Property so leased to the
retirement  of Senior Notes or other Debt of the Company  ranking  senior to, or
equally  with,  the  Senior  Notes,  subject to  reduction,  as set forth in the
Supplemental  Indenture, in respect of Senior Notes and such Debt retired during
such 180-day period other than pursuant to mandatory  sinking fund or prepayment
provisions and payments at Stated Maturity.

     DEFINITIONS.  The term  "Capitalization"  shall  mean the  total of all the
following  items appearing on, or included in, the balance sheet of the Company:
(i) liabilities for  indebtedness  maturing more than 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, less, to
the extent not  otherwise  deducted,  the cost of shares of capital stock of the
Company held in its treasury.

     The term "Net Tangible  Assets" shall mean 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,  tradenames,  patents and unamortized  debt discount and expense and
other  regulatory  assets  carried as an asset on said balance  sheet;  and (ii)
appropriate adjustments, if any, on account of minority interests.

     The term "Operating  Property" shall mean (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" shall mean any arrangement with
any person  providing for the leasing to the Company of any  Operating  Property
(except for leases for a term,  including any renewal thereof,  of not more than
48 months), which Operating Property has been or is to be sold or transferred by
the Company to such person.

     The  term  "Value"  shall  mean,  with  respect  to a Sale  and  Lease-Back
Transaction,  as of any particular  time, the amount equal to the greater of (i)
the net proceeds to the Company from the sale or transfer of the property leased
pursuant to such Sale and  Lease-Back  Transaction or (ii) 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 each 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

                                       14

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.

EVENTS OF DEFAULT

     Each of the following will  constitute an Event of Default under the Senior
Note  Indenture  with respect to Senior Notes of any series:  (a) failure to pay
principal  of or any  premium  on any  Senior  Note of  that  series  when  due,
continued for five days;  (b) failure to pay any interest on any Senior Notes of
that  series  when due,  continued  for sixty  days;  (c) failure to deposit any
sinking  fund  payment,  when due, in respect of any Senior Note of that series;
(d)  failure to perform  any other  covenant  of the  Company in the Senior Note
Indenture  (other than a covenant  included in the Senior Note Indenture  solely
for the benefit of a series other than that series), continued for 90 days after
written  notice has been given by the Senior Note  Trustee,  or the Holders of a
majority in principal amount of the Outstanding  Senior Notes of that series, as
provided  in the Senior  Note  Indenture;  (e) prior to the  Release  Date,  the
occurrence  of a Default under the Mortgage  (see  "Description  of New Bonds --
Events of Default"),  of which the Bond Trustee under the Mortgage,  the Company
or the Holders of at least 25% in aggregate  principal amount of the outstanding
senior notes have given written notice  thereof to the Senior Note Trustee;  and
(f) certain events in bankruptcy, insolvency or reorganization. (Section 601).

     If an Event of Default (other than an Event of Default  described in clause
(f)  above)  with  respect  to the  Senior  Notes  of  any  series  at the  time
Outstanding shall occur and be continuing, either the Senior Note Trustee or the
Holders of a majority in  principal  amount of the  Outstanding  Senior Notes of
that series by notice as provided in the Senior Note  Indenture  may declare the
principal  amount of the Senior  Notes of that  series  (or,  in the case of any
Senior Note that is an Original Issue  Discount Note or the principal  amount of
which is not then  determinable,  such portion of the  principal  amount of such
Senior Note, or such other amount in lieu of such  principal  amount,  as may be
specified in the terms of such Senior  Note) to be due and payable  immediately.
If an Event of Default  described in clause (f) above with respect to the Senior
Notes of any series at the time Outstanding shall occur, the principal amount of
all the Senior Notes of that series (or, in the case of any such Original  Issue
Discount Note or other Senior Note, such specified  amount) will  automatically,
and  without  any  action by the  Senior  Note  Trustee  or any  Holder,  become
immediately  due and  payable.  After any such  acceleration,  but  before (i) a
judgment  or decree  based on  acceleration  or (ii) the Senior  Note  Trustee's
receipt from the Bond Trustee under the Mortgage of a notice of  acceleration of
Senior Note First Mortgage Bonds, such acceleration will be automatically waived
and  rescinded  if  all  Events  of  Default,  other  than  the  non-payment  of
accelerated  principal (or other specified amount), have been cured or waived as
provided  in the  Indenture.  (Section  602).  For  information  as to waiver of
defaults, see "Modification and Waiver."

     Subject to the  provisions  of the Senior  Note  Indenture  relating to the
duties of the Senior Note Trustee in case an Event of Default shall occur and be
continuing,  the Senior Note Trustee will be under no obligation to exercise any
of its  rights or powers  under the  Senior  Note  Indenture  at the  request or
direction of any of the Holders,  unless such Holders  shall have offered to the
Senior  Note  Trustee  reasonable  indemnity.  (Section  703).  Subject  to such
provisions for the indemnification of the Senior Note Trustee,  the Holders of a
majority in principal amount of the Outstanding  Senior Notes of any series will
have the right to direct the time, method and place of conducting any proceeding
for any remedy available to the Senior Note Trustee,  or exercising any trust or
power conferred on the Senior Note Trustee,  with respect to the Senior Notes of
that series. (Section 612).

     No Holder of a Senior Note of any series  will have any right to  institute
any proceeding with respect to the Senior Note Indenture, or for the appointment
of a receiver or a trustee, or for any other remedy thereunder,  unless (i) such
Holder has  previously  given to the Senior  Note  Trustee  written  notice of a
continuing  Event of Default  with  respect to the Senior  Notes of that series,
(ii)  the  Holders  of at  least  25%  in  aggregate  principal  amount  of  the
Outstanding  Senior  Notes of that series have made  written  request,  and such
Holder or Holders have offered reasonable indemnity,  to the Senior Note Trustee
to institute such  proceeding as trustee,  and (iii) the Senior Note Trustee has
failed to institute such proceeding,  and has not received from the Holders of a
majority in aggregate  principal amount of the Outstanding  Senior Notes of that
series a direction  inconsistent  with such  request,  within 60 days after such
notice, request

                                       15

and offer.  (Section  607).  However,  such  limitations  do not apply to a suit
instituted  by a Holder of a Senior Note for the  enforcement  of payment of the
principal  of or any  premium or  interest  on such  Senior Note on or after the
applicable due date specified in such Senior Note. (Section 608).

     The Company will be required to furnish to the Trustee annually a statement
by certain of its officers as to whether or not the Company, to their knowledge,
is in default in the  performance or observance of any of the terms,  provisions
and conditions of the Indenture and, if so,  specifying all such known defaults.
(Section 1104).

MODIFICATION AND WAIVER

     Modifications  and  amendments of the Senior Note  Indenture may be made by
the  Company and the Senior  Note  Trustee  with the consent of the Holders of a
majority in  principal  amount of the  Outstanding  Senior  Notes of each series
affected by such  modification  or amendment;  provided,  however,  that no such
modification  or  amendment  may,  without  the  consent  of the  Holder of each
Outstanding Senior Note affected thereby,  (a) change the Stated Maturity of the
principal of, or any instalment of principal of or interest on, any Senior Note,
(b) reduce the  principal  amount of, or any premium or interest  on, any Senior
Note,  (c) reduce the amount of principal of an Original  Issue Discount Note or
any other Senior Note payable upon  acceleration  of the Maturity  thereof,  (d)
change  the place or  currency  of payment of  principal  of, or any  premium or
interest  on, any Senior Note,  (e) impair the right to  institute  suit for the
enforcement  of any payment on or with respect to any Senior Note,  (f) prior to
the Release  Date,  (i) impair the  interest  of the Senior Note  Trustee in the
Senior Note Mortgage  Bonds,  (ii) reduce the principal  amount of any series of
Senior Note Mortgage  Bonds to an amount less than the  principal  amount of the
related  Series of Notes,  or (iii) alter the payment  provisions  of the Senior
Note  Mortgage  Bonds in a manner  adverse to the  Holders of the Notes,  or (g)
reduce the  percentage in principal  amount of  Outstanding  Senior Notes of any
series,  the consent of whose Holders is required for  modification or amendment
of the Senior Note  Indenture,  reduce the  percentage  in  principal  amount of
Outstanding  Senior Notes of any series  necessary for waiver of compliance with
certain  provisions  of the  Senior  Note  Indenture  or for  waiver of  certain
defaults or modify such  provisions  with  respect to  modification  and waiver.
(Section 1002).

     The Holders of a majority in  principal  amount of the  Outstanding  Senior
Notes of any series may waive compliance by the Company with certain restrictive
provisions  of the Senior  Note  Indenture.  (Section  1108).  The  Holders of a
majority in principal  amount of the Outstanding  Senior Notes of any series may
waive any past default under the Senior Note Indenture,  except a default in the
payment of principal,  premium, or interest and certain covenants and provisions
of the Senior Note Indenture  which cannot be amended without the consent of the
Holder of each Outstanding Senior Note of such series affected. (Section 613).

     The Senior Note Indenture provides that in determining  whether the Holders
of the requisite  principal amount of the Outstanding Senior Notes have given or
taken any direction,  notice, consent,  waiver, or other action under the Senior
Note  Indenture as of any date,  (i) the principal  amount of an Original  Issue
Discount  Note that will be deemed to be  Outstanding  will be the amount of the
principal  thereof  that  would  be  due  and  payable  as  of  such  date  upon
acceleration of the Maturity thereof to such date, (ii) if, as of such date, the
principal  amount  payable  at the  Stated  Maturity  of a  Senior  Note  is not
determinable  (for  example,  because  it is based on an index),  the  principal
amount of such Senior Note deemed to be  Outstanding  as of such date will be an
amount  determined in the manner  prescribed  for such Senior Note and (iii) the
principal amount of a Senior Note denominated in one or more foreign  currencies
or currency units that will be deemed to be Outstanding  will be the U.S. dollar
equivalent,  determined as of such date in the manner prescribed for such Senior
Note, of the  principal  amount of such Senior Note (or, in the case of a Senior
Note  described  in clause (i) or (ii) above,  of the amount  described  in such
clause).  Certain Senior Notes,  including those for whose payment or redemption
money has been  deposited  or set aside in trust for the  Holders and those that
have been fully  defeased  pursuant  to Section  1402,  will not be deemed to be
Outstanding. (Section 101).

     Except in certain  limited  circumstances,  the Company will be entitled to
set any day as a record  date for the  purpose  of  determining  the  Holders of
Outstanding Senior Notes of any series entitled to give or

                                       16

take any direction,  notice,  consent,  waiver, or other action under the Senior
Note  Indenture,  in the manner and subject to the  limitations  provided in the
Senior Note Indenture. In certain limited circumstances, the Senior Note Trustee
will be entitled to set a record date for action by Holders. If a record date is
set for any action to be taken by Holders of a  particular  series,  such action
may be taken only by persons who are Holders of Outstanding Senior Notes of that
series on the record date. To be effective, such action must be taken by Holders
of the requisite principal amount of such Senior Notes within a specified period
following the record date. For any particular  record date,  this period will be
180 days or such other shorter period as may be specified by the Company (or the
Senior  Note  Trustee,  if it set the  record  date),  and may be  shortened  or
lengthened (but not beyond 180 days) from time to time. (Section 104).

DEFEASANCE AND COVENANT DEFEASANCE

     If and to the extent indicated in the applicable Prospectus Supplement, the
Company may elect,  at its option at any time, to have the provisions of Section
1402,  relating to defeasance  and discharge of  indebtedness,  or Section 1403,
relating  to  defeasance  of certain  restrictive  covenants  in the Senior Note
Indenture,  applied to the Senior Notes of any series,  or to any specified part
of a series. (Section 1401).

     DEFEASANCE AND DISCHARGE. The Senior Note Indenture provides that, upon the
Company's  exercise of its option (if any) to have  Section  1402 applied to any
Senior  Notes,  the Company will be  discharged  from all its  obligations  with
respect to such Senior  Notes  (except for  certain  obligations  to exchange or
register  the transfer of Senior  Notes,  to replace  stolen,  lost or mutilated
Senior  Notes,  to maintain  paying  agencies  and to hold moneys for payment in
trust)  upon the  deposit in trust for the benefit of the Holders of such Senior
Notes of money or U.S.  Government  Obligations,  or both,  which,  through  the
payment of principal and interest in respect  thereof in  accordance  with their
terms,  will provide  money in an amount  sufficient to pay the principal of and
any  premium  and  interest  on  such  Senior  Notes  on the  respective  Stated
Maturities  in accordance  with the terms of the Senior Note  Indenture and such
Senior Notes.  UPON SUCH DEFEASANCE AND DISCHARGE,  THE SENIOR NOTE TRUSTEE WILL
DELIVER TO THE COMPANY FOR  CANCELLATION ALL SENIOR NOTE MORTGAGE BONDS SECURING
SUCH SENIOR NOTES,  AFTER WHICH TIME SUCH SENIOR NOTES WILL NO LONGER BE SECURED
BY SENIOR NOTE MORTGAGE BONDS.  Such defeasance and discharge may occur only if,
among other  things,  the Company has  delivered  to the Senior Note  Trustee an
Opinion of Counsel to the effect that the Company has  received  from,  or there
has been published by, the United States Internal  Revenue Service a ruling,  or
there has been a change in tax law, in either case to the effect that Holders of
such  Senior  Notes  will not  recognize  gain or loss for  federal  income  tax
purposes as a result of such  deposit,  defeasance,  and  discharge  and will be
subject to federal income tax on the same amount,  in the same manner and at the
same times as would have been the case if such deposit, defeasance and discharge
were not to occur. (Sections 1402 and 1404).

     DEFEASANCE OF CERTAIN  COVENANTS.  The Senior Note Indenture provides that,
upon the Company's  exercise of its option (if any) to have Section 1403 applied
to any Senior  Notes,  the Company may omit to comply with  certain  restrictive
covenants that may be described in the applicable Prospectus Supplement, and the
occurrence of certain Events of Default, which are described above in clause (d)
(with respect to such restrictive  covenants) under "Description of Senior Notes
- -- Events of Default" and any that may be described in the applicable Prospectus
Supplement,  will be  deemed  not to be or result  in an Event of  Default  with
respect to such Senior  Notes.  The Company,  in order to exercise  such option,
will be  required  to  deposit,  in trust for the benefit of the Holders of such
Senior Notes, money or U.S. Government Obligations,  or both, which, through the
payment of principal and interest in respect  thereof in  accordance  with their
terms,  will provide  money in an amount  sufficient to pay the principal of and
any  premium  and  interest  on  such  Senior  Notes  on the  respective  Stated
Maturities  in accordance  with the terms of the Senior Note  Indenture and such
Senior Notes. The Company will also be required,  among other things, to deliver
to the Trustee an Opinion of Counsel to the effect  that  Holders of such Senior
Notes will not  recognize  gain or loss for  federal  income tax  purposes  as a
result of such deposit and defeasance of certain obligations and will be subject
to federal  income tax on the same  amount,  in the same  manner and at the same
times as would have been the case if such deposit and defeasance were

                                       17

not to occur. In the event the Company exercised this option with respect to any
Senior Notes and such Senior Notes were declared due and payable  because of the
occurrence  of any Event of  Default,  the  amount of money and U.S.  Government
Obligations so deposited in trust would be sufficient to pay amounts due on such
Senior Notes at the time of their  respective  Stated  Maturities but may not be
sufficient  to pay  amounts  due on such  Senior  Notes  upon  any  acceleration
resulting  from such Event of Default.  In such case,  the Company  would remain
liable for such payments. (Sections 1403 and 1404).

NOTICES

     Notices to Holders of Senior  Notes will be given by mail to the  addresses
of such Holders as they may appear in the Note Register. (Sections 101 and 106).

TITLE

     The Company,  the Senior Note Trustee,  and any agent of the Company or the
Senior  Note  Trustee  may  treat  the  Person  in whose  name a Senior  Note is
registered as the absolute owner thereof (whether or not such Senior Note may be
overdue) for the purpose of making payment and for all other purposes.  (Section
308).

GOVERNING LAW

     The Senior Note  Indenture  and the Senior  Notes will be governed  by, and
construed in accordance with, the law of the State of New York. (Section 112).

REGARDING THE SENIOR NOTE TRUSTEE

     The Senior  Note  Trustee is The Bank of New York.  The  Company  maintains
normal  banking  arrangements  with The Bank of New York,  which include (i) one
commitment in the aggregate  principal amount of approximately  $15.8 million by
The Bank of New York pursuant to a reimbursement  agreement  related to a letter
of credit  issued on behalf of the  Company in  connection  with an  issuance of
pollution  control  bonds,  the  proceeds  of which were made  available  to the
Company, and (ii) a $26.6 million commitment by The Bank of New York pursuant to
a  revolving  credit  agreement,   approximately   $6.3  million  of  which  was
outstanding  at  September  30,  1999.  The Bank of New York also  serves as (i)
trustee  under the Mortgage,  (ii) trustee for the holders of several  issues of
pollution control bonds issued on behalf of the Company, (iii) trustee under the
Company's  Indenture relating to subordinated Debt Securities (see below),  (iv)
investment manager for the Company's nonunion  post-retirement  medical fund and
(v) custodian of  international  fixed-income  assets for the Company's  pension
plan.

                         DESCRIPTION OF DEBT SECURITIES

GENERAL

     The  Debt  Securities  may be  issued  in one or more new  series  under an
Indenture  between  the  Company  and (i) The Bank of New  York,  in the case of
subordinated Debt Securities,  and (ii) The Chase Manhattan Bank, in the case of
senior Debt  Securities,  or any other trustees to be named, as Trustee (each, a
"Trustee"). The following summary does not purport to be complete and is subject
in all  respects  to the  provisions  of, and is  qualified  in its  entirety by
reference to, the Indentures  pursuant to which the subordinated and senior Debt
Securities are to be issued and to the Debt  Securities,  the forms of which are
filed, or will be filed, as exhibits to the registration statement of which this
Prospectus forms a part. Whenever particular provisions or defined terms in such
documents are referred to herein or in a Prospectus Supplement,  such provisions
or terms are  incorporated by reference  herein or therein,  as the case may be.
The term "Debt Securities" does not include Senior Notes, which are issued under
the Senior Note Indenture. See "Description of Senior Notes."

     The Debt Securities will be unsecured obligations of the Company.  Separate
Indentures  will be used  for  senior  Debt  Securities  and  subordinated  Debt
Securities,  respectively,  although the  description  of the Indenture  herein,
except as specifically stated otherwise, applies to both Indentures.

                                       18

     Reference is made to the Prospectus  Supplement  relating to any particular
issue of Offered Debt Securities for the following  terms: (1) the title of such
Debt  Securities;  (2) any limit on the aggregate  principal amount of such Debt
Securities  or the  series  of which  they are a part;  (3) the date or dates on
which the principal of any of such Debt Securities will be payable; (4) the rate
or rates at which any of such Debt  Securities  will bear interest,  if any, the
date or dates from which any such  interest  will accrue,  the Interest  Payment
Dates on which any such interest will be payable and the Regular Record Date for
any such interest  payable on any Interest Payment Date; (5) the place or places
where  the  principal  of and any  premium  and  interest  on any of  such  Debt
Securities  will be payable,  if other than as described  under  "Description of
Debt Securities -- Payment and Paying Agents";  (6) the period or periods within
which, the price or prices at which and the terms and conditions on which any of
such Debt Securities may be redeemed,  in whole or in part, at the option of the
Company; (7) the obligation, if any, of the Company to redeem or purchase any of
such Debt Securities  pursuant to any sinking fund or analogous  provision or at
the option of the Holder  thereof,  and the period or periods within which,  the
price or prices at which and the terms and  conditions on which any of such Debt
Securities will be redeemed or purchased,  in whole or in part,  pursuant to any
such obligation; (8) the denominations in which any of such Debt Securities will
be issuable,  if other than  denominations  of $1,000 and any integral  multiple
thereof;  (9) if the amount of principal of or any premium or interest on any of
such Debt Securities may be determined with reference to an index or pursuant to
a formula,  the manner in which such amounts will be  determined;  (10) if other
than the currency of the United States of America, the currency,  currencies, or
currency  units in which the  principal  of or any premium or interest on any of
such  Debt  Securities  will  be  payable  and the  manner  of  determining  the
equivalent  thereof  in the  currency  of the United  States of America  for any
purpose, including for purposes of determining the principal amount deemed to be
Outstanding at any time;  (11) if the principal of or any premium or interest on
any of such Debt Securities is to be payable,  at the election of the Company or
the Holder  thereof,  in one or more  currencies,  or currency  units other than
those in which such Debt  Securities  are stated to be  payable,  the  currency,
currencies  or  currency  units in which  payment of any such amount as to which
such  election is made will be payable,  the periods  within which and the terms
and conditions  upon which such election is to be made and the amount so payable
(or the manner in which such amount is to be determined); (12) if other than the
entire principal  amount thereof,  the portion of the principal amount of any of
such Debt Securities  which will be payable upon  declaration of acceleration of
the  Maturity  thereof;  (13) if the  principal  amount  payable  at the  Stated
Maturity of any of such Debt  Securities  will not be determinable as of any one
or more dates prior to the Stated  Maturity,  the amount which will be deemed to
be such  principal  amount as of any such date for any  purpose,  including  the
principal  amount  thereof which will be due and payable upon any Maturity other
than the Stated  Maturity  or which will be deemed to be  Outstanding  as of any
such date (or,  in any such  case,  the manner in which  such  deemed  principal
amount is to be determined);  (14) if applicable,  that such Debt Securities, in
whole or any specified  part, are  defeasible  pursuant to the provisions of the
Indenture  described  under  "Description  of Debt  Securities -- Defeasance and
Covenant  Defeasance  --  Defeasance  and  Discharge"  or  "Description  of Debt
Securities -- Defeasance  and Covenant  Defeasance -- Covenant  Defeasance,"  or
under both such  captions;  (15)  whether  any of such Debt  Securities  will be
issuable in whole or in part in the form of one or more Global  Securities  and,
if so, the respective  Depositaries for such Global Securities,  the form of any
legend or legends to be borne by any such  Global  Security in addition to or in
lieu of the legend  referred to under  "Description of Debt Securities -- Global
Securities"  and, if different  from those  described  under such  caption,  any
circumstances  under which any such Global Security may be exchanged in whole or
in part for Debt Securities registered, and any transfer of such Global Security
in whole or in part may be  registered,  in the names of Persons  other than the
Depositary  for such Global  Security or its  nominee;  (16) any  addition to or
change in the Events of Default  applicable to any of such Debt  Securities  and
any change in the right of the Trustee or the  Holders to declare the  principal
amount of any of such Debt  Securities due and payable;  (17) any addition to or
change in the covenants in the Indenture;  and (18) any other terms of such Debt
Securities not inconsistent with the provisions of the Indenture. (Section 301).

     Debt Securities,  including Original Issue Discount Securities, may be sold
at a substantial  discount below their principal amount.  Certain special United
States federal income tax considerations (if any)

                                       19

applicable  to  Debt  Securities  sold  at an  original  issue  discount  may be
described in the applicable Prospectus Supplement. In addition,  certain special
United States federal income tax or other  considerations (if any) applicable to
any Debt  Securities  which are denominated in a currency or currency unit other
than  United  States  dollars  may be  described  in the  applicable  Prospectus
Supplement.

     Except as otherwise described in the Prospectus  Supplement,  the covenants
contained  in  the  Indenture  would  not  afford  holders  of  Debt  Securities
protection in the event of a highly-leveraged transaction involving the Company.

SUBORDINATION

     The Indenture  relating to the subordinated Debt Securities  provides that,
unless otherwise provided in a supplemental indenture or a Board Resolution, the
Debt Securities will be subordinate and subject in right of payment to the prior
payment in full of all Senior Debt of the Company, whether outstanding as of the
date of the Indenture or thereafter incurred. (Section 1401). The balance of the
information  under  this  "Subordination"  heading  assumes  that  the  relevant
supplemental  indenture or Board Resolution results in the corresponding  series
of Debt Securities being subordinated obligations of the Company.

     No  payment  of  principal  of  (including   redemption  and  sinking  fund
payments), premium, if any, or interest on, the subordinated Debt Securities may
be made if any Senior Debt is not paid when due,  any  applicable  grace  period
with  respect to such  default has ended and such  default has not been cured or
waived, or if the maturity of any Senior Debt has been accelerated  because of a
default.  (Section  1402).  Upon any  distribution  of assets of the  Company to
creditors  upon any  dissolution,  winding-up,  liquidation  or  reorganization,
whether voluntary or involuntary or in bankruptcy,  insolvency,  receivership or
other proceedings, all principal of, and premium, if any, and interest due or to
become due on, all Senior  Debt must be paid in full  before the  holders of the
subordinated  Debt  Securities  are  entitled to receive or retain any  payment.
(Section 1403).  The rights of the holders of the  subordinated  Debt Securities
will be  subordinated  to the rights of the  holders  of Senior  Debt to receive
payments or  distributions  applicable to Senior Debt until all amounts owing on
the Debt Securities are paid in full. (Section 1404).

     The term  "Senior  Debt"  shall mean the  principal  of,  premium,  if any,
interest on and any other payment due pursuant to any of the following,  whether
outstanding  at the date of execution of the Indenture or  thereafter  incurred,
created or assumed:

          (a) all  indebtedness of the Company  evidenced by notes,  debentures,
     bonds,  or other  securities  sold by the Company for money,  including all
     first mortgage bonds of the Company outstanding from time to time;

          (b) all indebtedness of others of the kinds described in the preceding
     clause (a) assumed by or guaranteed in any manner by the Company; and

          (c) all renewals,  extensions,  or refundings of  indebtedness  of the
     kinds described in any of the preceding clauses (a) and (b);

unless,  in the  case of any  particular  indebtedness,  renewal,  extension  or
refunding,  the instrument  creating or evidencing the same or the assumption or
guarantee  of the same  expressly  provides  that  such  indebtedness,  renewal,
extension  or  refunding is not superior in right of payment to or is pari passu
with the Debt Securities. (Section 101).

     The Indenture  does not limit the aggregate  amount of Senior Debt that the
Company  may issue.  As of  September  30,  1999,  outstanding  Senior  Debt and
subordinated debt of the Company  aggregated  approximately $1.0 billion and $75
million,  respectively.  Any Senior Notes issued by the Company would constitute
Senior Debt,  whether  before or after the Release  Date.  See  "Description  of
Senior Notes -- Release Date."

FORM, EXCHANGE, AND TRANSFER

     The  Debt  Securities  of each  series  will  be  issuable  only  in  fully
registered  form  without  coupons  and,  unless  otherwise   specified  in  the
applicable  Prospectus  Supplement,  in denominations of $1,000 and any integral
multiple thereof. (Section 302).

                                       20

     At the option of the Holder,  subject to the terms of the Indenture and the
limitations applicable to Global Securities,  Debt Securities of any series will
be exchangeable for other Debt Securities of the same series,  of any authorized
denomination and of like tenor and aggregate principal amount. (Section 305).

     Subject to the terms of the  Indenture  and the  limitations  applicable to
Global  Securities,  Debt  Securities  may be presented for exchange as provided
above  or for  registration  of  transfer  (duly  endorsed  or with  the form of
transfer endorsed thereon duly executed) at the office of the Security Registrar
or at the  office of any  transfer  agent  designated  by the  Company  for such
purpose.  No service  charge  will be made for any  registration  of transfer or
exchange  of Debt  Securities,  but the  Company  may  require  payment of a sum
sufficient to cover any tax or other  governmental  charge payable in connection
therewith.  Such  transfer  or  exchange  will be  effected  upon  the  Security
Registrar or such transfer  agent,  as the case may be, being satisfied with the
documents  of title and identity of the person  making the request.  The Company
has appointed the Trustee as Security Registrar. Any transfer agent (in addition
to the  Security  Registrar)  initially  designated  by the Company for any Debt
Securities will be named in the applicable Prospectus Supplement. (Section 305).
The Company may at any time designate  additional transfer agents or rescind the
designation  of any  transfer  agent or approve a change in the  office  through
which any  transfer  agent acts,  except  that the  Company  will be required to
maintain a transfer  agent in each Place of Payment for the Debt  Securities  of
each series. (Section 1002).

     If the Debt Securities of any series (or of any series and specified tenor)
are to be redeemed,  the Company will not be required to (i) issue, register the
transfer of, or exchange any Debt Security of that series (or of that series and
specified tenor, as the case may be) during a period beginning at the opening of
business 15 days before the day of mailing of a notice of redemption of any such
Debt  Security  that may be selected for  redemption  and ending at the close of
business on the day of such mailing or (ii) register the transfer of or exchange
any Debt Security so selected for  redemption,  in whole or in part,  except the
unredeemed  portion of any such Debt Security being  redeemed in part.  (Section
305).

GLOBAL SECURITIES

     Some or all of the Debt  Securities  of any series may be  represented,  in
whole or in part, by one or more Global  Securities which will have an aggregate
principal amount equal to that of the Debt Securities  represented thereby. Each
Global  Security  will be  registered  in the name of a Depositary  or a nominee
thereof identified in the applicable  Prospectus  Supplement,  will be deposited
with such  Depositary or nominee or a custodian  therefor and will bear a legend
regarding the  restrictions on exchanges and  registration  of transfer  thereof
referred to below and any such other  matters as may be provided for pursuant to
the Indenture.

     Notwithstanding  any  provision  of  the  Indenture  or any  Debt  Security
described  herein,  no Global  Security may be exchanged in whole or in part for
Debt Securities registered,  and no transfer of a Global Security in whole or in
part may be registered,  in the name of any Person other than the Depositary for
such Global Security or any nominee of such Depositary unless (i) the Depositary
has  notified  the  Company  that it is  unwilling  or  unable  to  continue  as
Depositary for such Global Security or has ceased to be qualified to act as such
as required by the  Indenture,  (ii) there shall have occurred and be continuing
an Event of Default  with  respect to the Debt  Securities  represented  by such
Global  Security  or (iii)  there  shall  exist such  circumstances,  if any, in
addition  to or in lieu of  those  described  above as may be  described  in the
applicable Prospectus Supplement. All securities issued in exchange for a Global
Security  or any  portion  thereof  will  be  registered  in such  names  as the
Depositary may direct. (Sections 204 and 305).

     As long as the Depositary,  or its nominee,  is the registered  Holder of a
Global  Security,  the  Depositary or such nominee,  as the case may be, will be
considered  the sole  owner and  Holder  of such  Global  Security  and the Debt
Securities  represented  thereby for all purposes under the Debt  Securities and
the Indenture.  Except in the limited circumstances referred to above, owners of
beneficial  interests  in a Global  Security  will not be  entitled to have such
Global Security or any Debt Securities  represented  thereby registered in their
names,  will  not  receive  or be  entitled  to  receive  physical  delivery  of
certificated

                                       21

Debt Securities in exchange therefor and will not be considered to be the owners
or Holders of such Global  Security or any Debt Securities  represented  thereby
for any purpose  under the Debt  Securities  or the  Indenture.  All payments of
principal of and any premium and interest on a Global  Security  will be made to
the Depositary or its nominee,  as the case may be, as the Holder  thereof.  The
laws of some  jurisdictions  require that certain  purchasers of securities take
physical  delivery of such securities in definitive  form. These laws may impair
the ability to transfer beneficial interests in a Global Security.

     Ownership of beneficial  interests in a Global  Security will be limited to
institutions   that  have   accounts   with  the   Depositary   or  its  nominee
("participants")  and to  persons  that may hold  beneficial  interests  through
participants.  In  connection  with the  issuance  of any Global  Security,  the
Depositary will credit, on its book-entry  registration and transfer system, the
respective  principal  amounts  of Debt  Securities  represented  by the  Global
Security to the accounts of its participants.  Ownership of beneficial interests
in a Global  Security will be shown only on, and the transfer of those ownership
interests  will be effected only through,  records  maintained by the Depositary
(with respect to participants'  interests) or any such participant (with respect
to interests of persons held by such  participants  on their behalf).  Payments,
transfers,  exchanges,  and others matters relating to beneficial interests in a
Global Security may be subject to various policies and procedures adopted by the
Depositary from time to time.  None of the Company,  the Trustee or any agent of
the Company or the Trustee will have any  responsibility  or  liability  for any
aspect of the  Depositary's  or any  participant's  records  relating to, or for
payments made on account of, beneficial  interests in a Global Security,  or for
maintaining,  supervising,  or reviewing any records relating to such beneficial
interests.

PAYMENT AND PAYING AGENTS

     Unless otherwise indicated in the applicable Prospectus Supplement, payment
of interest on a Debt Security on any Interest  Payment Date will be made to the
Person  in whose  name  such  Debt  Security  (or one or more  Predecessor  Debt
Securities)  is registered  at the close of business on the Regular  Record Date
for such interest. (Section 307).

     Unless  otherwise  indicated  in  the  applicable  Prospectus   Supplement,
principal of and any premium and interest on the Debt Securities of a particular
series  will be payable at the office of such Paying  Agent or Paying  Agents as
the Company may designate for such purpose from time to time, except that at the
option of the Company payment of any interest may be made by check mailed to the
address of the Person  entitled  thereto as such address appears in the Security
Register.  Unless otherwise indicated in the applicable  Prospectus  Supplement,
the  corporate  trust  office  of the  Trustee  in The City of New York  will be
designated as the Company's  sole Paying Agent for payments with respect to Debt
Securities of each series.  Any other Paying Agents initially  designated by the
Company  for the Debt  Securities  of a  particular  series will be named in the
applicable  Prospectus  Supplement.  The  Company  may  at  any  time  designate
additional  Paying  Agents or rescind  the  designation  of any Paying  Agent or
approve a change in the office through which any Paying Agent acts,  except that
the Company will be required to maintain a Paying Agent in each Place of Payment
for the Debt Securities of a particular series. (Section 1002).

     All moneys  paid by the  Company to a Paying  Agent for the  payment of the
principal  of or any  premium or  interest  on any Debt  Security  which  remain
unclaimed at the end of two years after such principal,  premium or interest has
become due and  payable  will be repaid to the  Company,  and the Holder of such
Debt  Security  thereafter  may look only to the Company  for  payment  thereof.
(Section 1003).

CONSOLIDATION, MERGER, AND SALE OF ASSETS

     Unless otherwise  indicated in the applicable  Prospectus  Supplement,  the
Company  may not  consolidate  with or merge  into any other  Person or  convey,
transfer or lease its properties and assets  substantially as an entirety to any
Person,  and may not  permit any  Person to  consolidate  with or merge into the
Company or convey, transfer, or lease its properties and assets substantially as
an  entirety  to the  Company,  unless  (i) the  successor  Person (if any) is a
corporation,  partnership,  trust or other entity organized and validly existing
under  the  laws  of  any  domestic   jurisdiction  and  assumes  the  Company's
obligations on the Debt  Securities and under the  Indenture,  (ii)  immediately
after giving effect to the

                                       22

transaction,  no Event of Default,  and no event which, after notice or lapse of
time or both,  would  become an Event of  Default,  shall have  occurred  and be
continuing and (iii) certain other  conditions are met.  (Section 801). Upon any
such merger,  consolidation  or transfer or lease of  properties,  the successor
person will be substituted  for the Company under the Indenture and  thereafter,
except in the case of a lease,  the  predecessor  person will be relieved of all
obligations and covenants  under the Indenture and the Debt Securities  (Section
802).

EVENTS OF DEFAULT

     Each of the  following  will  constitute  an Event  of  Default  under  the
Indenture  with  respect to Debt  Securities  of any series:  (a) failure to pay
principal  of or any premium on any Debt  Security of that series when due;  (b)
failure to pay any  interest  on any Debt  Securities  of that  series when due,
continued  for 30 days;  (c) failure to deposit any sinking fund  payment,  when
due, in respect of any Debt Security of that series;  (d) failure to perform any
other covenant of the Company in the Indenture  (other than a covenant  included
in the  Indenture  solely for the benefit of a series  other than that  series),
continued for 90 days after written notice has been given by the Trustee, or the
Holders of at least 25% in principal  amount of the Outstanding  Debt Securities
of that  series,  as  provided  in the  Indenture;  and (e)  certain  events  in
bankruptcy, insolvency or reorganization. (Section 501).

     If an Event of Default (other than an Event of Default  described in clause
(e)  above)  with  respect  to the Debt  Securities  of any  series  at the time
Outstanding shall occur and be continuing,  either the Trustee or the Holders of
at least 25% in aggregate principal amount of the Outstanding Debt Securities of
that  series by notice as provided in the  Indenture  may declare the  principal
amount  of the  Debt  Securities  of that  series  (or,  in the case of any Debt
Security that is an Original Issue Discount  Security or the principal amount of
which is not then  determinable,  such portion of the  principal  amount of such
Debt Security,  or such other amount in lieu of such principal amount, as may be
specified in the terms of such Debt Security) to be due and payable immediately.
If an Event of Default  described  in clause (e) above with  respect to the Debt
Securities  of any series at the time  Outstanding  shall occur,  the  principal
amount of all the Debt  Securities  of that  series (or, in the case of any such
Original Issue Discount Security or other Debt Security,  such specified amount)
will automatically,  and without any action by the Trustee or any Holder, become
immediately due and payable. After any such acceleration,  but before a judgment
or  decree  based on  acceleration,  the  Holders  of a  majority  in  aggregate
principal  amount of the  Outstanding  Debt Securities of that series may, under
certain  circumstances,  rescind  and annul such  acceleration  if all Events of
Default, other than the non-payment of accelerated principal (or other specified
amount), have been cured or waived as provided in the Indenture.  (Section 502).
For information as to waiver of defaults, see "Modification and Waiver."

     Subject to the  provisions of the  Indenture  relating to the duties of the
Trustee in case an Event of Default shall occur and be  continuing,  the Trustee
will be under no  obligation  to exercise  any of its rights or powers under the
Indenture at the request or direction of any of the Holders, unless such Holders
shall have offered to the Trustee reasonable  indemnity.  (Section 603). Subject
to such  provisions  for the  indemnification  of the Trustee,  the Holders of a
majority in principal  amount of the  Outstanding  Debt Securities of any series
will have the  right to direct  the time,  method  and place of  conducting  any
proceeding for any remedy  available to the Trustee,  or exercising any trust or
power  conferred on the Trustee,  with  respect to the Debt  Securities  of that
series. (Section 512).

     No Holder of a Debt Security of any series will have any right to institute
any  proceeding  with  respect to the  Indenture,  or for the  appointment  of a
receiver  or a  trustee,  or for any other  remedy  thereunder,  unless (i) such
Holder has previously  given to the Trustee written notice of a continuing Event
of Default with respect to the Debt Securities of that series,  (ii) the Holders
of at least 25% in aggregate principal amount of the Outstanding Debt Securities
of that  series  have made  written  request,  and such  Holder or Holders  have
offered  reasonable  indemnity,  to the Trustee to institute such  proceeding as
trustee and (iii) the Trustee has failed to institute such  proceeding,  and has
not received from the Holders of a majority in aggregate principal amount of the
Outstanding  Debt Securities of that series a direction  inconsistent  with such
request,  within 60 days after such notice,  request and offer.  (Section  507).
However, such

                                       23

limitations do not apply to a suit instituted by a Holder of a Debt Security for
the  enforcement  of payment of the  principal  of or any premium or interest on
such Debt Security on or after the  applicable  due date  specified in such Debt
Security. (Section 508).

     The Company will be required to furnish to the Trustee annually a statement
by certain of its officers as to whether or not the Company, to their knowledge,
is in default in the  performance or observance of any of the terms,  provisions
and conditions of the Indenture and, if so,  specifying all such known defaults.
(Section 1004).

MODIFICATION AND WAIVER

     Modifications  and  amendments  of the Indenture may be made by the Company
and the  Trustee  without  the  consent  of the  Holders  of any  series of Debt
Securities  in  certain  limited  cases.  Modifications  and  amendments  of the
Indenture  may also be made by the Company  and the Trustee  with the consent of
the  Holders  of not less  than 66 2/3% in  aggregate  principal  amount  of the
Outstanding  Debt  Securities of each series  affected by such  modification  or
amendment;  provided,  however,  that no such  modification  or  amendment  may,
without the consent of the Holder of each  Outstanding  Debt  Security  affected
thereby,  (a) change the Stated  Maturity of the principal of, or any instalment
of  principal  of or interest on, any Debt  Security,  (b) reduce the  principal
amount of, or any  premium or  interest  on, any Debt  Security,  (c) reduce the
amount of principal  of an Original  Issue  Discount  Security or any other Debt
Security payable upon acceleration of the Maturity thereof, (d) change the place
or currency of payment of principal  of, or any premium or interest on, any Debt
Security,  (e) impair the right to  institute  suit for the  enforcement  of any
payment on or with respect to any Debt  Security,  (f) reduce the  percentage in
principal  amount of Outstanding  Debt Securities of any series,  the consent of
whose Holders is required for modification or amendment of the Indenture, reduce
the percentage in principal  amount of Outstanding Debt Securities of any series
necessary for waiver of compliance  with certain  provisions of the Indenture or
for  waiver of  certain  defaults  or modify  such  provisions  with  respect to
modification and waiver. (Section 902).

     The Holders of not less than 66 2/3% in aggregate  principal  amount of the
Outstanding  Debt  Securities of any series may waive  compliance by the Company
with certain  restrictive  provisions  of the  Indenture.  (Section  1008).  The
Holders of a majority in principal  amount of the Outstanding Debt Securities of
any series may waive any past default under the  Indenture,  except a default in
the payment of  principal,  premium,  or  interest  and  certain  covenants  and
provisions of the Indenture  which cannot be amended  without the consent of the
Holder of each Outstanding Debt Security of such series affected. (Section 513).

     The  Indenture  provides  that in  determining  whether  the Holders of the
requisite  principal  amount of the  Outstanding  Debt  Securities have given or
taken  any  direction,  notice,  consent,  waiver,  or other  action  under  the
Indenture as of any date, (i) the principal amount of an Original Issue Discount
Security  that  will be  deemed  to be  Outstanding  will be the  amount  of the
principal  thereof  that  would  be  due  and  payable  as  of  such  date  upon
acceleration of the Maturity thereof to such date, (ii) if, as of such date, the
principal  amount  payable  at the Stated  Maturity  of a Debt  Security  is not
determinable  (for  example,  because  it is based on an index),  the  principal
amount of such Debt Security deemed to be Outstanding as of such date will be an
amount  determined in the manner prescribed for such Debt Security and (iii) the
principal  amount  of a  Debt  Security  denominated  in  one  or  more  foreign
currencies or currency units that will be deemed to be  Outstanding  will be the
U.S. dollar equivalent,  determined as of such date in the manner prescribed for
such Debt  Security,  of the principal  amount of such Debt Security (or, in the
case of a Debt  Security  described  in clause (i) or (ii) above,  of the amount
described in such clause).  Certain Debt  Securities,  including those for whose
payment or  redemption  money has been  deposited  or set aside in trust for the
Holders and those that have been fully defeased  pursuant to Section 1302,  will
not be deemed to be Outstanding. (Section 101).

     Except in certain  limited  circumstances,  the Company will be entitled to
set any day as a record  date for the  purpose  of  determining  the  Holders of
Outstanding  Debt  Securities  of any  series  entitled  to  give  or  take  any
direction,  notice, consent, waiver, or other action under the Indenture, in the
manner and  subject to the  limitations  provided in the  Indenture.  In certain
limited  circumstances,  the  Trustee  will be entitled to set a record date for
action by Holders. If a record date is set for any action to be taken by

                                       24

Holders of a particular series, such action may be taken only by persons who are
Holders of Outstanding  Debt Securities of that series on the record date. To be
effective,  such  action  must be taken by  Holders of the  requisite  principal
amount of such Debt Securities  within a specified  period  following the record
date. For any particular record date, this period will be 180 days or such other
shorter period as may be specified by the Company (or the Trustee, if it set the
record date),  and may be shortened or lengthened (but not beyond 180 days) from
time to time. (Section 104).

DEFEASANCE AND COVENANT DEFEASANCE

     If and to the extent indicated in the applicable Prospectus Supplement, the
Company may elect,  at its option at any time, to have the provisions of Section
1302,  relating to defeasance  and discharge of  indebtedness,  or Section 1303,
relating  to  defeasance  of certain  restrictive  covenants  in the  Indenture,
applied to the Debt  Securities  of any series,  or to any  specified  part of a
series. (Section 1301).

     DEFEASANCE AND DISCHARGE.  The Indenture  provides that, upon the Company's
exercise  of its  option  (if  any) to have  Section  1302  applied  to any Debt
Securities, the Company will be discharged from all its obligations with respect
to such Debt Securities (except for certain  obligations to exchange or register
the transfer of Debt  Securities,  to replace  stolen,  lost or  mutilated  Debt
Securities, to maintain paying agencies and to hold moneys for payment in trust)
upon the deposit in trust for the benefit of the Holders of such Debt Securities
of money or U.S. Government Obligations,  or both, which, through the payment of
principal and interest in respect thereof in accordance  with their terms,  will
provide  money in an amount  sufficient  to pay the principal of and any premium
and interest on such Debt  Securities  on the  respective  Stated  Maturities in
accordance  with the  terms of the  Indenture  and such  Debt  Securities.  Such
defeasance or discharge  may occur only if, among other things,  the Company has
delivered  to the  Trustee an Opinion of Counsel to the effect  that the Company
has received  from, or there has been  published by, the United States  Internal
Revenue Service a ruling,  or there has been a change in tax law, in either case
to the effect that Holders of such Debt  Securities  will not recognize  gain or
loss for federal  income tax purposes as a result of such  deposit,  defeasance,
and discharge and will be subject to federal  income tax on the same amount,  in
the same  manner  and at the same  times  as  would  have  been the case if such
deposit, defeasance and discharge were not to occur. (Sections 1302 and 1304).

     DEFEASANCE OF CERTAIN  COVENANTS.  The Indenture  provides  that,  upon the
Company's  exercise of its option (if any) to have  Section  1303 applied to any
Debt  Securities,  the  Company  may omit to  comply  with  certain  restrictive
covenants that may be described in the applicable Prospectus Supplement, and the
occurrence of certain Events of Default, which are described above in clause (d)
(with respect to such  restrictive  covenants) under "Events of Default" and any
that may be described in the applicable  Prospectus  Supplement,  will be deemed
not to be or  result  in an Event  of  Default  and the  provisions  of  Article
Fourteen  relating  to  subordination  (included  in the  Indenture  relating to
subordinated  Debt  Securities)  will cease to be  effective,  in each case with
respect to such Debt Securities.  The Company, in order to exercise such option,
will be  required  to  deposit,  in trust for the benefit of the Holders of such
Debt Securities,  money or U.S. Government Obligations,  or both, which, through
the payment of principal  and  interest in respect  thereof in  accordance  with
their terms,  will provide money in an amount sufficient to pay the principal of
and any premium and interest on such Debt  Securities on the  respective  Stated
Maturities  in  accordance  with  the  terms  of the  Indenture  and  such  Debt
Securities. The Company will also be required, among other things, to deliver to
the  Trustee an Opinion  of  Counsel  to the  effect  that  Holders of such Debt
Securities  will not recognize gain or loss for federal income tax purposes as a
result of such deposit and defeasance of certain obligations and will be subject
to federal  income tax on the same  amount,  in the same  manner and at the same
times as would have been the case if such  deposit  and  defeasance  were not to
occur.  In the event the Company  exercised this option with respect to any Debt
Securities and such Debt Securities were declared due and payable because of the
occurrence  of any Event of  Default,  the  amount of money and U.S.  Government
Obligations so deposited in trust would be sufficient to pay amounts due on such
Debt Securities at the time of their respective Stated Maturities but may not be
sufficient  to pay amounts  due on such Debt  Securities  upon any  acceleration
resulting  from such Event of Default.  In such case,  the Company  would remain
liable for such payments. (Sections 1303 and 1304).

                                       25

NOTICES

     Notices  to  Holders  of  Debt  Securities  will  be  given  by mail to the
addresses of such Holders as they may appear in the Security Register. (Sections
101 and 106).

TITLE

     The Company,  the Trustee,  and any agent of the Company or the Trustee may
treat the Person in whose name a Debt  Security is  registered  as the  absolute
owner thereof (whether or not such Debt Security may be overdue) for the purpose
of making payment and for all other purposes. (Section 308).

GOVERNING LAW

     The Indenture and the Debt Securities will be governed by, and construed in
accordance with, the law of the State of New York. (Section 112).

REGARDING THE TRUSTEES

     The  Trustee  under  the  Indenture   relating  to  the  subordinated  Debt
Securities  is The  Bank of New  York.  The  Company  maintains  normal  banking
arrangements  with The Bank of New York, which include (i) one commitment in the
aggregate  principal  amount of  approximately  $15.8 million by The Bank of New
York pursuant to a reimbursement  agreement related to a letter of credit issued
on behalf of the Company in  connection  with an issuance of  pollution  control
bonds,  the proceeds of which were made  available  to the  Company,  and (ii) a
$26.6 million  commitment by The Bank of New York pursuant to a revolving credit
agreement,  approximately $6.3 million of which was outstanding at September 30,
1999.  The Bank of New York also serves as (i) trustee  under the Mortgage  (see
"Description  of New Bonds"),  (ii) trustee for the holders of several issues of
pollution control bonds issued on behalf of the Company, (iii) trustee under the
Senior Note Indenture  (see  "Description  of Senior  Notes"),  (iv)  investment
manager  for  the  Company's  nonunion  post-retirement  medical  fund  and  (v)
custodian of international  fixed-income  assets for the Company's pension plan.
The Trustee  under the Indenture  relating to the senior Debt  Securities is The
Chase Manhattan Bank. The Company maintains normal banking arrangements with The
Chase  Manhattan  Bank. The Chase  Manhattan Bank also (i) serves as trustee for
the holders of several  series of bonds  secured by,  among  other  things,  the
Company's payments under its Palo Verde Nuclear Generating Station leases (these
bonds were issued by a party  unaffiliated with the Company),  (ii) serves as an
issuing and paying agent with respect to the Company's commercial paper program,
and (iii) has a  commitment  to lend the  Company  up to $49.4  million  under a
revolving credit agreement, approximately $13.8 million of which was outstanding
as of September 30, 1999. In addition,  an affiliate of The Chase Manhattan Bank
is the owner  participant  with respect to a lease with the Company  relating to
the  sale  and  leaseback  of a  portion  of Unit 2 of the  Palo  Verde  Nuclear
Generating Station.

                              PLAN OF DISTRIBUTION

     The  Company  intends  to sell up to $275  million in  aggregate  principal
amount of the Offered Securities to or through  underwriters or dealers, and may
also sell the Offered Securities directly to other purchasers or through agents,
as  described  in the  Prospectus  Supplement  relating  to an issue of  Offered
Securities.

     The  distribution  of the Offered  Securities  may be effected from time to
time in one or more  transactions  at a fixed  price  or  prices,  which  may be
changed,  or at market prices  prevailing at the time of sale, at prices related
to such prevailing market prices, or at negotiated prices.

     In connection  with the sale of the Offered  Securities,  underwriters  may
receive  compensation from the Company or from purchasers of Offered  Securities
for  whom  they may act as  agents  in the form of  discounts,  concessions,  or
commissions. Underwriters may sell Offered Securities to or through dealers, and
such dealers may receive compensation in the form of discounts,  concessions, or
commissions  from the  underwriters  and/or  commissions from the purchasers for
whom they may act as agents. Underwriters,  dealers, and agents that participate
in the distribution of Offered Securities may be deemed to

                                       26

be  underwriters,  and any  discounts or  commissions  received by them from the
Company and any profit on the resale of Offered Securities by them may be deemed
to be underwriting  discounts and  commissions  under the Securities Act of 1933
(the "1933 Act"). Any such person who may be deemed to be an underwriter will be
identified,  and  any  such  compensation  received  from  the  Company  will be
described, in the Prospectus Supplement.

     Under  agreements  which may be entered into by the Company,  underwriters,
dealers,  and  agents  who  participate  in  the  distribution  of  the  Offered
Securities may be entitled to  indemnification  by the Company  against  certain
liabilities, including liabilities under the 1933 Act.

                                     EXPERTS

     The financial statements  incorporated in this Prospectus by reference from
the  Company's  1998 Annual  Report on Form 10-K have been audited by Deloitte &
Touche  LLP,  independent   auditors,  as  stated  in  their  report,  which  is
incorporated herein by reference, and have been so incorporated in reliance upon
the report of such firm given upon their  authority as experts in accounting and
auditing.

                                 LEGAL OPINIONS

     The validity of the  Securities  offered hereby will be passed upon for the
Company by Snell & Wilmer L.L.P.,  One Arizona Center,  Phoenix,  Arizona 85004,
and, it is currently anticipated, for any underwriters of Securities by Sullivan
& Cromwell,  1888 Century Park East, Los Angeles,  California  90067.  In giving
their  opinions,  Sullivan & Cromwell and Snell & Wilmer  L.L.P.  may rely as to
matters  of New Mexico law upon the  opinion  of  Keleher & McLeod,  P.A.,  1200
Public Service Building,  Albuquerque, New Mexico 87102, Sullivan & Cromwell may
rely as to all matters of Arizona law upon the opinion of Snell & Wilmer L.L.P.,
and Snell & Wilmer  L.L.P.  may rely as to all  matters of New York law upon the
opinion of Sullivan & Cromwell.

                                       27

                                       APS

                             ARIZONA PUBLIC SERVICE
                                     COMPANY