DUQUESNE LIGHT CO
424B5, 1998-04-21
ELECTRIC SERVICES
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                                            Filed Pursuant to Rule 424(b)(5)
                                            Registration No. 33-63602



          This prospectus supplement relates to an effective registration
          statement under the Securities Act of 1933, and is subject to
          completion or amendment.


                  SUBJECT TO COMPLETION, DATED APRIL 17, 1998  



               PROSPECTUS SUPPLEMENT TO PROSPECTUS DATED JUNE 15, 1993

                                     $100,000,000

                        [LOGO]          DUQUESNE LIGHT COMPANY

                           % Quarterly Interest Bonds Due 2038
                      -----                                    

          Interest payable February 1, May 1,
                August 1 and November 1               Due February 1, 2038 


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

           The      %   Quarterly  Interest  Bonds  Due  2038 (the "Offered
              -----
            Bonds") are part  of the series of debt securities of Duquesne
              Light  Company  designated  "First Collateral Trust Bonds,
               Series E" and described in the accompanying Prospectus.
                The  Offered  Bonds  will  mature on February 1, 2038.
                The Offered Bonds will bear interest from the date of
                 original issuance, and interest on the Offered Bonds
                 will be payable quarterly in arrears on February 1,
                  May 1,   August 1  and  November 1  of  each  year
                  commencing August 1, 1998.  The Offered Bonds will
                  not be  redeemable  prior to May 1, 2003.  On and
                   after  that  date,  the  Offered  Bonds  may  be
                    redeemed in whole at any time, or in part from
                    time to time, at the option of the Company at
                     a redemption price  equal  to  100%  of the
                      principal amount  thereof,  plus  accrued
                       interest  to  the  redemption date.  The
                        Offered  Bonds   will   be  issued  in
                        denominations of $25 and any integral
                                  multiple thereof.

          The Offered Bonds will be represented by one or more Global Bonds
           registered  in  the  name  of a nominee of The Depository Trust
            Company, as Depositary.   Beneficial interests in Global Bonds
            representing Book-Entry Bonds will be shown on,  and transfer
             thereof will be effected only through, records maintained by
             the Depositary and its participants. The Offered Bonds will
              not be represented  by  certificates  issued in definitive
              form, except  under  the  limited circumstances described
               herein.   See "Supplemental Description  of  the Offered
                Bonds--Book-Entry Bonds."  The Offered Bonds have been
                 approved for listing on the New York Stock Exchange,
                 subject to official notice of issuance.  Trading of
                   the Offered Bonds on the New York Stock Exchange
                   is expected to commence  within a 30-day period
                      after the initial delivery of the Offered
                          Bonds.  See "Underwriting" herein.


            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
                         SUPPLEMENT OR THE PROSPECTUS. ANY
                           REPRESENTATION TO THE CONTRARY
                               IS A CRIMINAL OFFENSE.


                                              Underwriting
                                   Price to   Discounts and     Proceeds to
                                  Public(1)  Commissions(2)   Company(1)(2)(3)
                                  ---------  --------------   ----------------
     Per Offered Bond . . . . .          %               %                 %
     Total  . . . . . . . . . .    $           $                $

          (1)  Plus accrued interest, if any, from date of issuance.
          (2)  The underwriting discount will be    % of the principal 
                                                 ---
               amount of Offered Bonds sold to certain institutions. 
               Therefore, to the extent any such sales are made to such
               institutions, the actual total underwriting discount will be
               less than, and the actual total proceeds to the Company will
               be greater than, the amounts shown in the table above.
          (3)  Before deduction of expenses payable by the Company
               estimated at $325,000.

               The Offered Bonds are offered by the several Underwriters
          when, as and if issued by the Company, delivered to and accepted
          by the Underwriters and subject to their right to reject orders
          in whole or in part.  It is expected that delivery of the Offered
          Bonds will be made in book-entry form through the facilities of
          The Depository Trust Company on or about April   , 1998, against
                                                         --
          payment in immediately available funds.

              CREDIT SUISSE FIRST BOSTON           SALOMON SMITH BARNEY    

          GOLDMAN, SACHS & CO.                          MERRILL LYNCH & CO.

                     Prospectus Supplement dated April   , 1998.
                                                       --


     <PAGE>


          CERTAIN PERSONS PARTICIPATING IN THIS OFFERING MAY ENGAGE IN
          TRANSACTIONS THAT STABILIZE, MAINTAIN OR OTHERWISE AFFECT THE
          PRICE OF THE SECURITIES OFFERED HEREBY, INCLUDING OVER-ALLOTMENT,
          STABILIZING TRANSACTIONS, SYNDICATE SHORT COVERING TRANSACTIONS
          AND PENALTY BIDS.  FOR A DESCRIPTION OF THESE ACTIVITIES, SEE
          "UNDERWRITING."





                                      S-2
     <PAGE>


                                 SUMMARY OF OFFERING

               The following summary is qualified in its entirety by
          reference to the detailed information appearing elsewhere in this
          Prospectus Supplement and in the accompanying Prospectus. 
          Capitalized terms not otherwise defined shall have the meanings
          assigned in the accompanying Prospectus.

          The Company . . . . .    The Company was formed under the laws of
                                   Pennsylvania by the consolidation and
                                   merger in 1912 of three constituent
                                   companies.  As part of a corporate
                                   reorganization, the Company became a
                                   wholly-owned subsidiary of DQE, an
                                   energy services holding company formed
                                   in 1989.  The Company is engaged in the
                                   generation, transmission, distribution
                                   and sale of electric energy, providing
                                   electric service to customers in
                                   Allegheny County, including the City of
                                   Pittsburgh, Beaver County and
                                   Westmoreland County.  This territory
                                   represents approximately 800 square
                                   miles in southwestern Pennsylvania,
                                   located within a 500-mile radius of one-
                                   half of the population of the United
                                   States and Canada.  The population of
                                   the area served by the Company's
                                   electric utility operations, based on
                                   1990 census data, is approximately
                                   1,510,000, of whom 370,000 reside in the
                                   City of Pittsburgh.  In addition to
                                   serving approximately 580,000 direct
                                   customers, the Company's utility
                                   operations also sell electricity to
                                   other utilities.

          Offered Bonds . . . .    The Company is offering $100,000,000
                                   aggregate principal amount of the
                                   Offered Bonds.  Interest on the Offered
                                   Bonds will be payable quarterly in
                                   arrears on February 1, May 1, August 1
                                   and November 1 of each year, commencing
                                   August 1, 1998.

          Record Date . . . . .    The regular record date for each
                                   Interest Payment Date will be the
                                   January 15, April 15, July 15 or October
                                   15, as the case may be, next preceding
                                   such Interest Payment Date.

          Security  . . . . . .    The Offered Bonds will be issued as a
                                   tranche of securities under the
                                   Company's Mortgage.  The Mortgage
                                   constitutes a first mortgage lien on all
                                   of the property of the Company subject
                                   thereto, subject to certain Permitted
                                   Liens.  See "Supplemental Description of
                                   the Offered Bonds -- Security; Discharge
                                   of the 1947 Mortgage" herein, and
                                   "Security" in the accompanying
                                   Prospectus.


                                      S-3
     <PAGE>


          Redemption  . . . . .    The Offered Bonds may be redeemed at the
                                   option of the Company in whole at any
                                   time or in part from time to time, on or
                                   after May 1, 2003, at a redemption price
                                   of 100% of the principal amount plus
                                   accrued interest to the redemption date. 
                                   See "Supplemental Description of the
                                   Offered Bonds Optional Redemption"
                                   herein.

          Proposed Listing  . .    The New York Stock Exchange

          NYSE Symbol . . . . .    DQZ


                                    CAPITALIZATION


               The following table sets forth the consolidated
          capitalization of the Company as of December 31, 1997, and as
          adjusted to give effect to the issuance of the Offered Bonds and
          certain other transactions.  The table should be read in
          conjunction with the consolidated financial statements of the
          Company and the notes thereto appearing in the Incorporated
          Documents.

                                              Capitalization as of
                                               December 31, 1997
                                       ----------------------------------

                                       Actual    As Adjusted (1)      %
                                       ------    ---------------   ------

                                        (Thousands, except percentages)



           Common Stockholders'
              Equity                  $1,003,833       $1,003,833    40.3%

           Preferred Stock                64,608           64,608     2.6%

           Monthly Income Preferred
              Securities                 150,000          150,000     6.0%

           Preference Stock, net of
              deferred ESOP benefit
              of $16,400                  11,895           11,895     0.5%

             % Quarterly Interest 
           --
              Bonds due 2038                  --          100,000     4.0%

           First Mortgage Bonds          778,000          718,000    28.9%

           Pollution Control Notes       417,985          417,985    16.8%

           Other Long-Term Debt           22,291           22,291     0.9%
                                      ----------       ----------   ------
              Total Capitalization,
                excluding amounts     $2,448,612       $2,488,612   100.0%
                due within one year   ==========       ==========   ======

          (1)  Reflects the following adjustments: (i) the February 1998
               issuance of $40 million aggregate principal amount of 6.45%
               first mortgage bonds, due February 2008; (ii) the March 1998
               redemption of $100 million aggregate principal amount of
               8.75% first mortgage bonds due May 2022 at a redemption
               price of 106.5625%; and (iii) the issuance of the Offered
               Bonds.


                                      S-4
     <PAGE>


                                 RECENT DEVELOPMENTS

          RECOMMENDED DECISIONS ON THE PROPOSED MERGER AND THE
          RESTRUCTURING PLANS

               On March 25, 1998, two Pennsylvania Public Utility
          Commission ("PUC") administrative law judges recommended that a
          decision on the proposed merger of the Company's parent, DQE,
          Inc. and Allegheny Energy, Inc.  ("AYE") be deferred for up to 18
          months to allow the companies to address market power concerns. 
          If the PUC follows this recommendation, the proposed merger,
          originally anticipated to be consummated in mid-1998, may not
          occur.  In two other decisions issued at the same time, the
          judges recommended approval, with modifications, of the
          restructuring plans of the Company and of AYE's utility
          subsidiary, West Penn Power.  On April 14, 1998, the Company
          filed exceptions to the recommendations regarding the Company's
          restructuring plan.  Also on April 14, DQE and AYE jointly filed
          exceptions to the PUC administrative law judges' recommendation
          that approval of the proposed merger be delayed by up to 18
          months until market power concerns have been addressed.

               In its restructuring plan filed in August 1997, the Company
          proposed a market-based approach to determining the value of its
          generating assets, with a final market test to be applied in
          2003, when electricity markets are more fully developed.  The
          administrative law judge did not support this approach, citing
          the delay until 2003 as inappropriate, and recommended instead
          either an immediate auction of the Company's generating assets if
          the proposed DQE/AYE merger is not consummated, or an
          administrative determination of the value of such assets if the
          proposed DQE/AYE merger is consummated.  In its exceptions, the
          Company is seeking clarification of the administrative law
          judge's recommendation.  Also in its exceptions, the Company
          reaffirms its fundamental premise that market data should be used
          to set the value of its generating assets.

               In their joint exceptions, DQE and AYE commit to mitigate
          the potential market power of the new company by joining the
          Midwest Independent System Operator (MISO), a regional
          electricity transmission organization, and by relinquishing
          control of the output of the Company's 570-megawatt Cheswick
          Power Station (Cheswick) for a minimum of two years or until the 
          MISO has been approved.  Both actions would occur immediately
          upon completion of the proposed merger.  DQE and AYE further
          commit to issue a request for proposals to sell the output of
          Cheswick within a month of securing all required regulatory
          approvals for the proposed merger.  The Company will continue to
          own and operate Cheswick.  Both DQE and AYE are urging the PUC to
          adopt the plan for a final valuation of generating assets in
          2003.

               The PUC is currently scheduled to consider all exceptions to
          the recommended decisions at its April 30, 1998 meeting.  A final
          vote is currently scheduled for May 21, 1998.  Further details
          about exceptions and the recommended decisions are provided in
          the Company's reports on Form 8-K, filed with the SEC on April 8
          and April 17, 1998.

          BEAVER VALLEY POWER STATION

               Beaver Valley Unit 1 ("BV Unit 1") went off-line January 30,
          1998, due to an issue identified in a technical review recently
          completed by the Company.  Beaver Valley Unit 2 ("BV Unit 2")
          went off-line December 16, 1997, to repair the emergency air
          supply system to the control room and has remained off-line due
          to other issues identified by a similar technical review of BV
          Unit 2.  These technical reviews are in response to a 1997
          commitment made by the Company to the Nuclear Regulatory
          Commission ("NRC").  The Company is one of many utilities faced
          with similar issues, some of which date back to the initial
          start-up of Beaver Valley Power Station.  Both units remain off-
          line for a reaffirmation of compliance with the technical
          specification requirements of various plant systems.  The Company
          is preparing for a meeting with the NRC, currently expected to


                                      S-5
     <PAGE>


          take place in late April 1998, to review its action plans and
          discuss any needed remediation.  Both units will remain off-line
          until the action plans have been satisfactorily completed. 
          Further details are provided in the Company's Annual Report on
          Form 10-K for the year ended December 31, 1997.


                          RATIO OF EARNINGS TO FIXED CHARGES


                               Year Ended December 31,
                  ------------------------------------------------
                    1997       1996      1995      1994      1993
                    ----       ----      ----      ----      ----

                    2.49       2.64      2.71      2.58      2.42

          Duquesne's share of the fixed charges of an unaffiliated coal
          supplier, which amounted to approximately $2.7 million for the
          twelve months ended December 31, 1997, has been excluded from the
          ratio.  Earnings related to income taxes reflect a $17.0 million,
          $12.0 million, $13.5 million, $13.5 million and $10.4 million
          decrease for the twelve months ended December 31, 1997, 1996,
          1995, 1994 and 1993, respectively, due to a financial statement
          reclassification related to Statement of Financial Accounting
          Standards No. 109, Accounting for Income Taxes.  The ratio of
          earnings to fixed charges, absent this reclassification equals
          2.61, 2.72, 2.81, 2.67 and 2.48 for the twelve months ended
          December 31, 1997, 1996, 1995, 1994 and 1993, respectively.

                                   USE OF PROCEEDS

               The Company currently intends to use the net proceeds from
          the sale of Offered Bonds for general corporate purposes,
          including the possible redemption of higher cost securities of
          the Company.


                    SUPPLEMENTAL DESCRIPTION OF THE OFFERED BONDS

               The following description of the particular terms of the
          Offered Bonds of Duquesne Light Company (the "Company")
          supplements, and to the extent inconsistent therewith supersedes,
          the description of the general terms and provisions of the Bonds
          set forth under "Description of the Bonds" in the accompanying
          Prospectus, to which description reference is hereby made. 
          Certain capitalized terms used herein are defined under
          "Description of the Bonds" in the accompanying Prospectus.

          GENERAL

               The Offered Bonds will be issued as a tranche of a series of
          Mortgage Securities under the Mortgage limited in aggregate
          principal amount to $300,000,000; such tranche will be limited in
          aggregate principal amount to $100,000,000.

               The Offered Bonds will be issued in fully registered form
          only, without coupons.  The Offered Bonds will be issued
          initially as Book-Entry Bonds (as hereinafter defined) and,
          except as set forth herein under "Book-Entry Bonds," will not be
          exchangeable for, or otherwise issuable as, Certificated Bonds
          (as hereinafter defined).  The authorized denominations of the
          Offered Bonds will be $25 and any integral multiple thereof.


                                      S-6
     <PAGE>


          DISCHARGE OF 1947 MORTGAGE

               On August 30, 1995 all Class "A" Bonds issued under the
          Company's 1947 Mortgage were surrendered for cancellation and the
          1947 Mortgage was discharged.  As of such date the only bonds
          that had been outstanding under the 1947 Mortgage were Class "A"
          Bonds held by the Trustee as the basis of authentication and
          delivery of Mortgage Securities, and no other Class "A" Mortgage
          existed.  As a result of the discharge of the 1947 Mortgage, the
          lien of the 1947 Mortgage on the Company's property ceased to
          exist and the Mortgage became a first mortgage lien on all
          property of the Company subject thereto, subject to certain
          Permitted Liens as described under "Description of the Bonds --
          Security" in the accompanying Prospectus.  The information set
          forth in the accompanying Prospectus under the headings
          "Description of the Bonds -- Security" and "Description of the
          1947 Mortgage" is accordingly hereby superseded as a result of
          the discharge of the 1947 Mortgage.  The Offered Bonds will be
          issued on the basis of Property Additions as described under
          "Description of the Bonds -- Issuance of Additional Mortgage
          Securities" in the accompanying Prospectus.

          PAYMENT AND MATURITY

               The Offered Bonds will mature on February 1, 2038 (the
          "Stated Maturity") and will bear interest at a rate of    percent
                                                                 --
          per annum until the principal amount thereof is paid or made
          available for payment.  The Offered Bonds will bear interest from
          the date of original issuance.  Interest on each Offered Bond
          will be payable quarterly in arrears on each February 1, May 1,
          August 1 and November 1 of each year (each such date an "Interest
          Payment Date"), commencing August 1, 1998, and at Maturity.  Each
          payment of interest in respect of an Interest Payment Date will
          include interest accrued to but excluding such Interest Payment
          Date.  Interest on the Offered Bonds will be computed on the
          basis of a 360-day year of twelve 30-day months.

               Payments of interest on the Offered Bonds (other than
          interest payable at Maturity) will be made by check mailed to the
          Holders of such Offered Bonds as of the Regular Record Date for
          each Interest Payment Date; provided, however, that (a) in the
          case of Global Bonds representing Book-Entry Bonds (the holder of
          which will be a nominee of the Depositary, as hereinafter
          defined), such payment will be made in accordance with
          arrangements then in effect among the Company, the Paying Agent
          and the Depositary (see "Book-Entry Bonds"); and (b) if and to
          the extent the Company defaults in the payment of the interest
          due on any Offered Bond on any Interest Payment Date, such
          defaulted interest will be paid as described under "Description
          of the Bonds -- Payment of Bonds; Transfers; Exchanges" in the
          accompanying Prospectus.  The "Regular Record Date" with respect
          to any Interest Payment Date will be the January 15, April 15,
          July 15 or October 15 (whether or not a "Business Day" as defined
          below), as the case may be, immediately preceding such Interest
          Payment Date.

               Except as described below under "Book-Entry Bonds" and under
          "Description of the Bonds -- Payment of Bonds; Transfers;
          Exchanges" in the accompanying Prospectus, principal of the
          Offered Bonds and any premium and interest thereon payable at
          Maturity will be paid upon surrender thereof at the office of The
          First National Bank of Chicago in New York, New York.

               If, with respect to any Offered Bond, any Interest Payment
          Date, redemption date or Stated Maturity is not a Business Day,
          payment of amounts due on such Offered Bond on such date may be
          made on the next succeeding Business Day and, if such payment is
          made or duly provided for on such Business Day, no interest shall
          accrue on such amounts for the period from and after such
          Interest Payment Date, redemption date or Stated Maturity, as the
          case may be, to such Business Day.

               "Business Day" with respect to any Offered Bond means any
          day, other than a Saturday or Sunday, which is not a day on which
          banking institutions or trust companies in The City of New York,
          New York or the city in which is located any office or agency


                                      S-7
     <PAGE>


          maintained for the payment of principal of or premium, if any, or
          interest on such Offered Bond are authorized or required by law,
          regulation or executive order to remain closed.

          CERTAIN TRADING CHARACTERISTICS

               The Company has been advised by The New York Stock Exchange
          that the Offered Bonds are expected to trade at a price that
          takes into account the value, if any, of accrued but unpaid
          interest (except for interest accrued after a Regular Record Date
          and prior to an Interest Payment Date, which interest will be
          payable to the Holders as of such Regular Record Date, as
          described above); thus, purchasers will not pay, and sellers will
          not receive, accrued and unpaid interest with respect to the
          Offered Bonds that is not included in the trading price thereof. 
          Any portion of the trading price of an Offered Bond received by a
          seller that is attributable to accrued interest will be treated
          as ordinary interest income for federal income tax purposes and
          will not be treated as part of the amount realized for purposes
          of determining gain or loss on the disposition of the Offered
          Bond.

          OPTIONAL REDEMPTION

               The Company will have the right to redeem Offered Bonds, in
          whole at any time or in part from time to time, on or after May
          1, 2003, upon not less than 30 nor more than 60 days' notice, at
          a redemption price equal to 100% of the principal amount to be so
          redeemed plus any accrued and unpaid interest to the redemption
          date.

               Additional information concerning redemption is contained
          under "Description of the Bonds -- Redemption" in the
          accompanying Prospectus.

          MODIFICATION OF MORTGAGE

               Reference is made to "Modification of Mortgage" in the
          accompanying Prospectus.

               The Holders of the Offered Bonds will be deemed to have
          consented to the execution and delivery of a supplemental
          indenture containing one or more, or all, of the amendments to
          the Mortgage described below:

                  (a)  to change the definition of the term "Stated
               Interest Rate" to provide, among other things, that any
               calculation or other determination to be made under the
               Mortgage by reference to the Stated Interest Rate on an
               obligation which secures other indebtedness will be made by
               reference to the lower of the Stated Interest Rate on such
               obligation and the Stated Interest Rate on such other
               indebtedness;

                  (b)  to change the definition of the term "Cost" to,
               among other things, clarify that such term includes, in
               addition to the amount of cash paid, the fair market value
               of property delivered and the principal amount of
               indebtedness assumed, and any other amounts which, in
               accordance with generally accepted accounting principles,
               are properly chargeable to plant or other property accounts;
               and/or

                  (c)  to add a definition of the term "fair value",
               providing, among other things, that "fair value" with
               respect to any property will be determined by reference to
               (a) the amount which would be likely to be obtained in an
               arm's length transaction with respect to such property
               between an informed and willing buyer and an informed and
               willing seller, under no compulsion, respectively, to buy or
               sell, (b) the amount of investment with respect to such
               property which, together with a reasonable return thereon,


                                      S-8
     <PAGE>


               would be likely to be recovered through ordinary business
               operations or otherwise, (c) the cost, accumulated
               depreciation and replacement cost with respect to such
               property and (d) any other relevant factors.

               As more fully described under "DESCRIPTION OF THE BONDS --
          Release of Property" in the accompanying Prospectus, obligations
          secured by purchase money mortgage on any property to be released
          from the lien of the Mortgage may be deposited with the Trustee
          or the trustee or other holder of a lien prior to the lien of the
          Mortgage, and the release of such property may be made on the
          basis of the principal amount of such obligations so deposited. 
          The use of obligations secured by purchase money mortgage on
          property to be released as the basis of such release, as
          described above, is subject to the following limitations: (x) no
          obligations secured by purchase money mortgage may be so used
          unless all obligations secured by such purchase money mortgage
          shall be delivered to the Trustee or the trustee or other holder
          of a prior lien; (y) the aggregate credit which may be used as
          described above in respect of any property being released may not
          exceed 75% of the fair value of such property; and (z) no such
          obligations may be so used as a credit in connection with the
          release of property if the aggregate credit in respect of such
          obligations to be used as described above plus the aggregate
          credits used by the Company in connection with all previous
          releases of property on the basis of purchase money obligations
          theretofore delivered to and then held by the Trustee or the
          trustee or other holder of a prior lien shall, immediately after
          the release then being applied for, exceed 15% of the aggregate
          principal amount of Mortgage Securities then Outstanding.

               The Holders of the Offered Bonds will be deemed to have
          consented to the execution and delivery of a supplemental
          indenture containing, in addition to the amendments to the
          Mortgage described above, one or both of the amendments described
          below:

                  (x)  to modify the provisions described in the preceding
               paragraph to (i) delete the provisions described in clause
               (x) or to provide that such provisions may be disregarded
               upon specified conditions; and/or (ii)(A) to delete the
               provisions described in clause (z) or to provide that clause
               (z) may be disregarded upon specified conditions; or (B) to
               delete from the provisions described in clause (z) the
               limitation of 15%; or (C) to change the percentage in clause
               (z) to any higher percentage not exceeding 100%; and/or

                  (y)  to add a definition of the term "purchase money
               mortgage" to mean, generally, a lien on the property being
               acquired or disposed of by the Company or being released
               from the lien of the Mortgage which is retained by the
               transferor of such property or granted to one or more
               persons in connection with the transfer or release thereof,
               or granted to or held by a trustee or agent for any such
               persons, and which would include, among other things, liens
               which (i) permit the incurrence of indebtedness secured
               thereby in addition to indebtedness incurred in connection
               with the transfer of specific property, (ii) permit the
               subjection of other property to the lien thereof and/or
               (iii) were granted prior to any particular transfer of
               property, which cover other property and/or which secure
               other obligations issued prior or subsequent to the
               obligations delivered in connection with any particular
               acquisition, disposition or release of property.

               The Officer's Certificate which establishes certain terms of
          the Offered Bonds provides that the possible modifications to the
          Mortgage described above will be substantially of the tenor or
          effect of the forms thereof set forth in such Officer's
          Certificate.  A form of such Officer's Certificate, as well as
          the Officer's Certificate which established the series of
          Mortgage Securities designated First Collateral Trust Bonds,
          Series E, are on file with the Trustee and have been filed with
          the SEC as an exhibit to the Registration Statement (Registration
          No. 33-63602) relating to the First Collateral Trust Bonds,
          Series E.


                                      S-9
     <PAGE>


          THE TRUSTEE

               On November 24, 1997, The Chase Manhattan Bank succeeded
          Mellon Bank, N.A. as Trustee under the Mortgage.

          BOOK-ENTRY BONDS

               The Offered Bonds will be represented by global bonds (each,
          a "Global Bond") that will be deposited with, or on behalf of,
          The Depository Trust Company, New York, New York ("DTC"), or such
          other depositary as may be subsequently designated (DTC and any
          other such depositary being hereinafter referred to as the
          "Depositary"), and registered in the name of the Depositary, or
          its nominee (such an Offered Bond, so represented, being called a
          "Book-Entry Bond").  Except under the limited circumstances
          described below, Book-Entry Bonds represented by Global Bonds
          will not be exchangeable for certificates issued in definitive
          form (any such Offered Bond, so represented, being called a
          "Certificated Bond"), and will not otherwise be issuable as
          Certificated Bonds.

               DTC is a limited-purpose trust company organized under the
          New York Banking Law, a "banking organization" within the meaning
          of the New York Banking Law, a member of the Federal Reserve
          System, a "clearing corporation" within the meaning of the New
          York Uniform Commercial Code, and a "clearing agency" registered
          pursuant to the provisions of Section 17A of the Exchange Act. 
          DTC was created to hold securities that are deposited by
          institutions having accounts with it ("participants"), and to
          facilitate the clearance and settlement of securities
          transactions, such as transfers and pledges, among its
          participants in such deposited securities through electronic
          computerized book-entry changes in accounts of the participants,
          thereby eliminating the need for physical movement of securities
          certificates.  DTC's participants include securities brokers and
          dealers (including the Underwriters), banks, trust companies,
          clearing corporations, and certain other organizations, some of
          whom (and/or their representatives) own DTC.  Access to DTC's
          book-entry system is also available to others, such as securities
          brokers and dealers, banks and trust companies that clear through
          or maintain a custodial relationship with a participant, either
          directly or indirectly.  The rules applicable to DTC and its
          participants are on file with the SEC.

               Purchases of beneficial interests in a Global Bond must be
          made by or through the Depositary's participants.  Upon the
          issuance of a Global Bond, the Depositary will credit, on its
          book-entry registration and transfer system, the respective
          principal amounts of the individual Book-Entry Bonds represented
          by such Global Bond to the accounts of its participants.  The
          accounts to be credited will initially be designated by the
          Underwriters or the Company.  Ownership of beneficial interests
          in a Global Bond will be shown on, and the transfer of that
          ownership will be effected only through, records maintained by
          the Depositary (with respect to participants' interests) or by
          participants or persons that hold through participants (with
          respect to person other than participants).  The laws of some
          states require that certain purchasers of securities take
          physical delivery of such securities.  Such limits and such laws
          may impair the ability to transfer beneficial interests in a
          Global Bond.

               Payments of principal of and premium, if any, and interest
          on individual Book-Entry Bonds represented by a Global Bond will
          be made to the Depositary or its nominee, as the case may be, as
          the Holder of such Global Bond.  The Depositary or its nominee,
          upon receipt of any payment of principal, premium or interest in
          respect of a definitive Global Bond, will credit the accounts of
          the related participants with payments in amounts proportionate
          to their respective beneficial interests in the principal amount
          of such Global Bond as shown on the records of the Depositary. 
          Payments by participants to owners of beneficial interests in
          such Global Bond held through such participants will be governed
          by standing instructions and customary practices, as is now the
          case with securities held for the accounts of customers in bearer
          form or registered in "street name", and will be the
          responsibility of such participants and not of the Depositary,


                                      S-10
     <PAGE>


          the Company or any Paying Agent, subject to any statutory or
          regulatory requirements as may be in effect from time to time. 
          Payments to the Depositary are the responsibility of the Company
          or any Paying Agent, disbursement of such payments to the
          Depositary's participants shall be the responsibility of the
          Depositary, and disbursement of such payments to the owners of
          beneficial interests in Global Bonds shall be the responsibility
          of the Depositary's participants and persons who hold through
          such participants.

               So long as the Depositary, or its nominee, is the registered
          owner of a Global Bond, such Depositary or such nominee, as the
          case may be, will be considered the sole holder of the individual
          Book-Entry Bonds represented by such Global Bond for all purposes
          under the Mortgage.  Except as set forth below, owners of
          beneficial interests in a Global Bond will not be entitled to
          have any of the individual Book-Entry Bonds represented by such
          Global Bond registered in their names, will not receive or be
          entitled to receive physical delivery of any such Book-Entry
          Bonds and will not be considered the Holders thereof under the
          Mortgage, including, without limitation, for purposes of
          consenting to any amendment thereof or supplement thereto as
          described in the accompanying Prospectus.  Neither DTC nor any
          nominee will consent or vote with respect to the Book-Entry
          Bonds.  Under its usual procedures, DTC will mail an omnibus
          proxy to the Company as soon as possible after the appropriate
          record date.  Such omnibus proxy assigns the rights of DTC or its
          nominee to vote or consent to those participants to whose
          accounts the Book-Entry Bonds are credited on such record date,
          identified in a listing attached to such omnibus proxy.

               If the Depositary is at any time unwilling or unable to
          continue as depositary and a successor depositary is not
          appointed, the Company will issue individual Certificated Bonds
          in exchange for the Global Bond or Bonds representing the
          corresponding Book-Entry Bonds.  In addition, the Company may at
          any time and in its sole discretion determine not to have any
          Bonds represented by one or more Global Bonds, and in such event,
          will issue individual Certificated Bonds in exchange for the
          Global Bond or Bonds representing the corresponding Book-Entry
          Bonds.  In any such instance, an owner of a Book-Entry Bond
          represented by a Global Bond or Bonds will be entitled to
          physical delivery of individual Certificated Bonds equal in
          principal amount to such Book-Entry Bond and to have such
          Certificated Bonds registered in its name.  Individual
          Certificated Bonds so issued will be issued as registered Offered
          Bonds in denominations of $25 and integral multiples thereof.

               The information in this section concerning the DTC and DTC's
          book-entry system is based upon information furnished by DTC, and
          the Company takes no responsibility for the accuracy thereof.

               None of the Company, the Trustee or any agent for payment on
          or registration of transfer or exchange of such Offered Bonds
          will have any responsibility or liability for any aspect of the
          records relating to or payments made on account of beneficial
          interests in such Global Bonds or for maintaining, supervising or
          reviewing any records relating to such beneficial interests.

                                    LEGAL OPINIONS

               Legal matters in connection with the Offered Bonds will be
          passed upon for the Company by David R. High, Esq., employed by
          the Company as its Assistant General Counsel, and by Reid &
          Priest LLP, special counsel for the Company, and for the
          Underwriters by Milbank, Tweed, Hadley & McCloy.  All legal
          matters pertaining to title and the lien of the Mortgage will be
          passed upon only by Mr. High.


                                      S-11
     <PAGE>

                                     UNDERWRITING

               Under the terms and subject to the conditions contained in
          the Selling Agency Agreement, dated June 15, 1993, as
          supplemented by the Terms Agreement, dated the date hereof (the
          "Underwriting Agreement"), the Underwriters named below (the
          "Underwriters"), for whom Credit Suisse First Boston Corporation,
          Smith Barney, Inc., Goldman, Sachs & Co. and Merrill Lynch,
          Pierce, Fenner & Smith Incorporated are acting as representatives
          (the "Representatives"), have severally but not jointly agreed to
          purchase from the Company the following respective principal
          amounts of Offered Bonds:

                                                         Principal Amount
                           Underwriter                     Offered Bonds
                           -----------                   ----------------

           Credit Suisse First Boston Corporation  . .     $

           Smith Barney, Inc.  . . . . . . . . . . . .

           Goldman, Sachs & Co.  . . . . . . . . . . .

           Merrill Lynch, Pierce, Fenner & Smith
                       Incorporated  . . . . . . . . .

                                                           ------------
                Total  . . . . . . . . . . . . . . . .     $100,000,000
                                                           =============

               The Underwriting Agreement provides that the obligations of
          the Underwriters are subject to certain conditions precedent, and
          the Underwriters will be obligated to purchase all of the Offered
          Bonds if any are purchased.

               The Company and the Underwriters have agreed that the
          underwriting discount will be    % per offered Bond, except that
                                        ---
          the underwriting discount will be    % per Offered Bond for bonds
                                            ---
          sold to certain institutions.  The Company has been advised by
          the Representatives that the Underwriters propose to offer the
          Offered Bonds to the public initially at the public offering
          price set forth on the cover page of this Prospectus Supplement,
          and to certain dealers at such price less a concession of .  % of
                                                                     --
          the principal amount of such Offered Bonds, and the Underwriters
          and such dealers may allow a discount of .  % of the principal 
                                                    --
          amount of such Offered Bonds on sales to certain other dealers. 
          After the initial public offering, the offering price and
          concession and discount to dealers may be changed by the
          Representatives.

               The Company has agreed, during the period of 15 days from
          the date of the Underwriting Agreement, not to issue or announce
          the proposed issuance of any of its secured debt securities with
          maturities or other terms substantially similar to the Offered
          Bonds (other than borrowings under revolving credit agreements
          and lines of credit and issuances of commercial paper), without
          the prior written consent of the Representatives.

               The Offered Bonds are a new issue of securities with no
          established trading market.  The Offered Bonds have been approved
          for listing on the New York Stock Exchange ("NYSE"), subject to
          official notice of issuance.  Trading of the Offered Bonds on the
          NYSE is expected to commence within a 30-day period after the
          initial delivery of the Offered Bonds.  In order to meet one of
          the requirements for listing the Offered Bonds on the NYSE, the
          Underwriters have undertaken to sell the Offered Bonds to a
          minimum of 400 beneficial holders.  The Company has been advised
          by the Underwriters that they intend to make a market in the
          Offered Bonds, but the Underwriters are not obligated to do so
          and may discontinue any market-making at any time without notice. 
          No assurance can be given as to the liquidity of the trading
          market for the Offered Bonds.


                                      S-12
     <PAGE> 


               The Company has agreed to indemnify the Underwriters against
          certain liabilities, including civil liabilities under the
          Securities Act, or contribute to payments which the Underwriters
          may be required to make in respect thereof.

               The Representatives, on behalf of the Underwriters, may
          engage in over-allotment, stabilizing transactions, syndicate
          covering transactions and penalty bids.  Over-allotment involves
          syndicate sales in excess of the offering size, which creates a
          syndicate short position.  Stabilizing transactions permit bids
          to purchase the underlying security so long as the stabilizing
          bids do not exceed a specified maximum.  Syndicate covering
          transactions involve purchases of the Offered Bonds in the open
          market after the distribution has been completed in order to
          cover syndicate short positions.  Penalty bids permit the
          Representatives to reclaim a selling concession from a syndicate
          member when the Offered Bonds originally sold by such syndicate
          member are purchased in a syndicate covering transaction to cover
          syndicate short positions.  Such stabilizing transactions,
          syndicate covering transactions and penalty bids may cause the
          price of the Offered Bonds to be higher than it would otherwise
          be in the absence of such transactions.  These transactions may
          be effected on the NYSE or otherwise and, if commenced, may be
          discontinued at any time.

               Credit Suisse First Boston Corporation, Salomon Smith Barney
          Inc., Goldman Sachs & Co. and Merrill Lynch, Pierce, Fenner &
          Smith Incorporated and certain affiliates thereof engage in
          transactions with and perform services for the Company and its
          affiliates in the ordinary course of business.


                             NOTICE TO CANADIAN RESIDENTS

          RESALE RESTRICTIONS

               The distribution of the Offered Bonds in Canada is being
          made only on a private placement basis exempt from the
          requirement that the Company prepare and file a prospectus with
          the securities regulatory authorities in each province where
          trades of Offered Bonds are effected.  Accordingly, any resale of
          the Offered Bonds in Canada must be made in accordance with
          applicable securities laws, which will vary depending on the
          relevant jurisdiction, and which may require resales to be made
          in accordance with available statutory exemptions or pursuant to
          a discretionary exemption granted by the applicable Canadian
          securities regulatory authority.  Purchasers are advised to seek
          legal advice prior to any resale of the Offered Bonds.

          REPRESENTATIONS OF PURCHASERS

               Each purchaser of Offered Bonds in Canada who receives a
          purchase confirmation will be deemed to represent to the Company
          and the dealer from whom such purchase confirmation is received
          that (i) such purchaser is entitled under applicable provincial
          securities laws to purchase such Offered Bonds without the
          benefit of a prospectus qualified under such securities laws,
          (ii) where required by law, that such purchaser is purchasing as
          principal and not as agent, and (iii) such purchaser has reviewed
          that text above under "Resale Restrictions."

          RIGHTS OF ACTION (ONTARIO PURCHASERS)

               The securities being offered are those of a foreign issuer
          and Ontario purchasers will not receive the contractual right of
          action prescribed by section 32 of the Regulation under the
          Securities Act (Ontario).  As a result, Ontario purchasers must
          rely on other remedies that may be available, including common
          law rights of action for damages or rescission or rights of
          action under the civil liability provisions of the U.S. federal
          securities laws.


                                      S-13
     <PAGE>


          ENFORCEMENT OF LEGAL RIGHTS

               All of the issuer's directors and officers as well as the
          experts named herein may be located outside of Canada and, as a
          result, it may not be possible for Canadian purchasers to effect
          service of process within Canada upon the issuer or such persons. 
          All or a substantial portion of the assets of the issuer and such
          persons may be located outside of Canada and, as a result, it may
          not be possible to satisfy a judgment against the issuer or such
          persons in Canada or to enforce a judgment obtained in Canadian
          courts against such issuer or persons outside of Canada.

          NOTICE TO BRITISH COLUMBIA RESIDENTS

               A purchaser of Offered Bonds to whom the Securities Act
          (British Columbia) applies is advised that such purchaser is
          required to file with the British Columbia Securities Commission
          a report within ten days of the sale of any Offered Bonds
          acquired by such purchaser pursuant to this offering.  Such
          report must be in the form attached to British Columbia
          Securities Commission Blanket Order BOR #95/17.  Only one such
          report must be filed in respect of Offered Bonds acquired on the
          same date and under the same prospectus exemption.

          TAXATION AND ELIGIBILITY FOR INVESTMENT

               Canadian purchasers of Offered Bonds should consult their
          own legal and tax advisors with respect to the tax consequence of
          an investment in the Offered Bonds in their particular
          circumstances and with respect to the eligibility of the Offered
          Bonds for investment by the purchaser under relevant Canadian
          legislation.




                                      S-14
     <PAGE>


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

          NO DEALER, SALESPERSON OR OTHER PERSON HAS BEEN AUTHORIZED TO
          GIVE ANY INFORMATION OR TO MAKE ANY REPRESENTATION NOT CONTAINED
          IN THIS PROSPECTUS SUPPLEMENT OR THE PROSPECTUS AND, IF GIVEN OR
          MADE, SUCH INFORMATION OR REPRESENTATION MUST NOT BE RELIED UPON
          AS HAVING BEEN AUTHORIZED BY THE COMPANY OR ANY UNDERWRITER. 
          THIS PROSPECTUS SUPPLEMENT AND THE PROSPECTUS DO NOT CONSTITUTE
          AN OFFER TO SELL OR A SOLICITATION OF AN OFFER TO BUY ANY OF THE
          SECURITIES OFFERED HEREBY IN ANY JURISDICTION TO ANY PERSON TO
          WHOM IT IS UNLAWFUL TO MAKE SUCH OFFER IN SUCH JURISDICTION. 
          NEITHER THE DELIVERY OF THIS PROSPECTUS SUPPLEMENT OR THE
          PROSPECTUS NOR ANY SALE MADE HEREUNDER SHALL, UNDER ANY
          CIRCUMSTANCES, CREATE ANY IMPLICATION THAT THE INFORMATION HEREIN
          IS CORRECT AS OF ANY TIME SUBSEQUENT TO THE DATE HEREOF OR THAT
          THERE HAS BEEN NO CHANGE IN THE AFFAIRS OF THE COMPANY SINCE SUCH
          DATE.

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

                                  TABLE OF CONTENTS

                                                                       Page
                                                                       ----
                                PROSPECTUS SUPPLEMENT


          Summary of Offering . . . . . . . . . . . . . . . . . . . .   S-3
          Capitalization  . . . . . . . . . . . . . . . . . . . . . .   S-4
          Recent Developments . . . . . . . . . . . . . . . . . . . .   S-5
          Ratio of Earnings to Fixed Charges  . . . . . . . . . . . .   S-6
          Use of Proceeds . . . . . . . . . . . . . . . . . . . . . .   S-6
          Supplemental Description of the
            Offered Bonds . . . . . . . . . . . . . . . . . . . . . .   S-6
          Legal Opinions  . . . . . . . . . . . . . . . . . . . . . .  S-11
          Underwriting  . . . . . . . . . . . . . . . . . . . . . . .  S-12
          Notice to Canadian Residents  . . . . . . . . . . . . . . .  S-13


                                      PROSPECTUS

          Available Information . . . . . . . . . . . . . . . . . . .     2
          Incorporation of Certain Documents by
            Reference . . . . . . . . . . . . . . . . . . . . . . . . .   2
          The Company . . . . . . . . . . . . . . . . . . . . . . . . .   2
          Use of Proceeds . . . . . . . . . . . . . . . . . . . . . . .   3
          Plan of Distribution  . . . . . . . . . . . . . . . . . . . .   3
          Description of the Bonds  . . . . . . . . . . . . . . . . . .   4
          Description of the 1947 Mortgage  . . . . . . . . . . . . . .  17
          Experts . . . . . . . . . . . . . . . . . . . . . . . . . . .  24
          Legal Opinions  . . . . . . . . . . . . . . . . . . . . . . .  24
          Pennsylvania Taxes  . . . . . . . . . . . . . . . . . . . . .  24

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



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                                     $100,000,000



                                        [LOGO]

                                    DUQUESNE LIGHT
                                       COMPANY



                                % Quarterly Interest Bonds
                           -----                          
                                       Due 2038





                                PROSPECTUS SUPPLEMENT



                              CREDIT SUISSE FIRST BOSTON

                                 SALOMON SMITH BARNEY

                                 GOLDMAN, SACHS & CO.

                                 MERRILL LYNCH & CO.


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