OTTER TAIL POWER CO
8-K, 1997-11-20
ELECTRIC SERVICES
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                          SECURITIES AND EXCHANGE COMMISSION
                               Washington, D.C.  20549


                                       FORM 8-K

                                   CURRENT REPORT

        PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934


Date of report (Date of earliest event reported):  November 18, 1997.




                               OTTER TAIL POWER COMPANY
                (Exact name of registrant as specified in its charter)


          Minnesota                    0-00368                 41-0462685
(State or other jurisdiction of   (Commission(I.R.S.            Employer
incorporation or organization)      File Number)           Identification No.)


215  South Cascade Street, P.O. Box 496, Fergus Falls, MN       56538-0496
         (Address of principal executive offices)               (Zip Code)



Registrant's telephone number, including area code:   (218) 739-8200


                                    Not Applicable
            (Former name or former address, if changed since last report.)


<PAGE>

ITEM 5.  OTHER EVENTS

         On November 18, 1997, the Registrant agreed to sell $50,000,000
aggregate principal amount of its Senior Debentures, 6.375% Series Due 2007 (the
"Debentures") pursuant to the Underwriting Agreement dated November 18, 1997
between the Registrant and A.G. Edwards & Sons, Inc.  The Debentures are the
subject of a Registration Statement on Form S-3 (File No. 333-11153) filed by
the Registrant with the Securities and Exchange Commission on  August 30, 1996
(the "Registration Statement").

ITEM 7.  FINANCIAL STATEMENTS AND EXHIBITS

    (c)  EXHIBITS

         The following documents are hereby filed as exhibits to the
    Registration Statement:

         1-B       Underwriting Agreement dated November 18, 1997 between the
                   Registrant and A.G. Edwards & Sons, Inc.

         4-D-11    Indenture (For Unsecured Debt Securities) dated as of
                   November 1, 1997 between the Registrant and First Trust
                   National Association, as trustee.

         4-D-12    Officer's Certificate and Authentication Order (including
                   the form of Debentures) dated November 18, 1997, relating to
                   the Debentures issued pursuant to the Indenture (For
                   Unsecured Debt Securities) dated as of November 1, 1997
                   between the Registrant and First Trust National Association,
                   as trustee.

         12-A-1    Calculation of Ratios of Earnings to Fixed Charges.

<PAGE>

                                      SIGNATURE

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


                                       OTTER TAIL POWER COMPANY
Date:  November 20, 1997

                                       By    /s/ Andrew E. Anderson
                                            ---------------------------
                                            Andrew E. Anderson
                                            Vice President, Finance and
                                               Treasurer

<PAGE>

                                    EXHIBIT INDEX


EXHIBIT       DESCRIPTION OF EXHIBIT

1-B           Underwriting Agreement dated November 18, 1997 between the
              Registrant and A.G. Edwards & Sons, Inc.

4-D-11        Indenture (For Unsecured Debt Securities) dated as of November 1,
              1997 between the Registrant and First Trust National Association,
              as trustee.

4-D-12        Officer's Certificate and Authentication Order (including the
              form of Debentures) dated November 18, 1997, relating to the
              Debentures issued pursuant to the Indenture (For Unsecured Debt
              Securities) dated as of November 18, 1997 between the Registrant
              and First Trust National Association, as trustee.

12-A-1        Calculation of Ratios of Earnings to Fixed Charges.


<PAGE>


                                                                    EXHIBIT 1-B

                               OTTER TAIL POWER COMPANY

                                      DEBENTURES

                                UNDERWRITING AGREEMENT


                                                               November 18, 1997


To the Representatives named in
Schedule I hereto of the Underwriters
named in Schedule II hereto

Dear Sirs:

         Otter Tail Power Company, a Minnesota corporation (the "COMPANY"),
proposes to sell to the underwriters named in Schedule II hereto (the
"UNDERWRITERS"), for whom you are acting as representatives (the
"REPRESENTATIVES"), the principal amount of its debt securities identified in
Schedule I hereto (the "SECURITIES"), to be issued under the Company's Indenture
(For Unsecured Debt Securities) dated as of November 1, 1997 (the "INDENTURE"),
between the Company and First Trust National Association, as trustee (the
"TRUSTEE").  If the firm or firms listed in Schedule II hereto include only the
firm or firms named as Representatives in Schedule I hereto, then the terms
"Underwriters" and "Representatives," as used herein, shall each be deemed to
refer to such firm or firms.

         1.   REPRESENTATIONS AND WARRANTIES.  The Company represents and
warrants to, and agrees with, each Underwriter that:

         (a)  The Company meets the requirements for use of Form S-3 under the
    Securities Act of 1933, as amended (the "ACT"), and has filed with the
    Securities and Exchange Commission (the "COMMISSION") a registration
    statement on such Form (the file number of which is set forth in Schedule I
    hereto), which has become effective, for the registration under the Act of
    $50,000,000 aggregate initial offering price of the Company's debt
    securities, including the Securities.  Such registration statement, as
    amended at the date of this Agreement, meets the requirements set forth in
    Rule 415(a)(1)(x) under the Act and complies in all other material respects
    with such Rule.  The Company proposes to file with the Commission pursuant
    to Rule 424 under the Act a supplement to the form of prospectus included
    in such registration statement relating to the Securities and the plan of
    distribution thereof and has previously advised the Representatives of all
    further information (financial and other) with respect to the Company to be
    set forth therein.  Such registration statement, including the exhibits
    thereto, as amended at the time it was declared effective by the
    Commission, is hereinafter called the "REGISTRATION STATEMENT"; such
    prospectus, in the form in which it appears in the Registration Statement,
    is hereinafter called the "BASIC PROSPECTUS"; and the Basic Prospectus as
    supplemented by


<PAGE>

    such prospectus supplement, in the form in which the same shall be filed
    (or transmitted for filing) with the Commission pursuant to such Rule 424,
    is hereinafter called the "FINAL PROSPECTUS."  Any preliminary form of the
    Final Prospectus which has heretofore been filed (or transmitted for
    filing) with the Commission pursuant to such Rule 424 is hereinafter called
    a "PRELIMINARY FINAL PROSPECTUS."  Any reference herein to the Registration
    Statement, the Basic Prospectus, any Preliminary Final Prospectus or the
    Final Prospectus shall be deemed to refer to and include the documents
    incorporated by reference therein pursuant to Item 12 of Form S-3 which
    were filed under the Securities Exchange Act of 1934, as amended (the
    "EXCHANGE ACT"), on or before the date of this Agreement, or the issue date
    of the Basic Prospectus, any Preliminary Final Prospectus or the Final
    Prospectus, as the case may be; and any reference herein to the terms
    "AMEND," "AMENDMENT" or "SUPPLEMENT" with respect to the Registration
    Statement, the Basic Prospectus, any Preliminary Final Prospectus or the
    Final Prospectus shall be deemed to refer to and include the filing of any
    document under the Exchange Act after the date of this Agreement, or the
    issue date of the Basic Prospectus, any Preliminary Final Prospectus or the
    Final Prospectus, as the case may be, so incorporated by reference.

         (b)  As of the time when the Registration Statement became effective,
    as of the date hereof, as of the time when any post-effective amendment to
    the Registration Statement becomes effective (if such effectiveness is
    prior to the termination of the offering of the Securities), as of the time
    when the Company's latest Annual Report on Form 10-K is filed with the
    Commission (if such filing is after January 1, 1997 and prior to the
    termination of the offering of the Securities), as of the time when the
    Final Prospectus is first filed (or transmitted for filing) pursuant to
    Rule 424 under the Act, as of the time when any supplement to the Final
    Prospectus is filed (or transmitted for filing) with the Commission (if
    such filing is prior to the termination of the offering of the Securities)
    and at the Closing Date (as hereinafter defined):

              (i)  the Registration Statement, as amended as of any such
         time, the Final Prospectus, as amended or supplemented as of any
         such time, and the Indenture complied or will comply in all
         material respects with the applicable requirements of the Act,
         the Exchange Act and the Trust Indenture Act of 1939, as amended
         (the "TRUST INDENTURE ACT"), and the respective rules thereunder;
         and

              (ii)  neither the Registration Statement, as amended as of any
         such time, nor the Final Prospectus, as amended or supplemented as of
         any such time, contained or will contain any untrue statement of a
         material fact or omitted or will omit to state any material fact
         required to be stated therein or necessary to make the statements
         therein, in the light of the circumstances under which they were made,
         not misleading; PROVIDED, HOWEVER, that the Company makes no
         representations or warranties as to (i) that part of the Registration
         Statement which shall constitute the Statements of Eligibility (Forms
         T-1 and T-2) under the Trust Indenture Act of the Trustee or the
         trustees under the Company's Indenture of Mortgage dated as of July 1,
         1936, as supplemented (the "MORTGAGE"), or (ii) the 



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         information contained in or omitted from the Registration
         Statement or the Final Prospectus, or any amendment thereto or
         supplement thereof, in reliance upon and in conformity with
         information furnished in writing to the Company by or on behalf of any
         Underwriter through the Representatives specifically for use in
         connection with the preparation of the Registration Statement or the
         Final Prospectus.

         (c)  The Public Utilities Commission of Minnesota (the "MINNESOTA
    COMMISSION") has entered one or more orders authorizing, among other
    things, (i) the Company's proposed capital structure after the issuance and
    sale by the Company of the Securities and other securities therein
    mentioned and (ii) the issue and sale of the Securities by the Company on
    terms and conditions not inconsistent with the terms and conditions set
    forth in or contemplated by this Agreement or any Delayed Delivery Contract
    (as hereinafter defined) as hereinafter provided; and no further approval,
    authorization, consent, certificate or order of any state or federal
    commission or regulatory authority is necessary with respect to the
    execution and delivery of the Indenture or the issue and sale of the
    Securities as contemplated herein and in any Delayed Delivery Contract
    (except that the sale of the Securities in certain jurisdictions may be
    subject to the securities or "Blue Sky" laws thereof).  A true and complete
    copy of such order or orders of the Minnesota Commission has been delivered
    to the Representatives.

         2.  PURCHASE AND SALE.  Subject to the terms and conditions and in
reliance upon the representations and warranties herein set forth, the Company
agrees to sell to each Underwriter, and each Underwriter agrees, severally and
not jointly, to purchase from the Company, at the purchase price set forth in
Schedule I hereto, the principal amount of the Securities set forth opposite
such Underwriter's name in Schedule II hereto, except that if Schedule I hereto
provides for the sale of the Securities pursuant to delayed delivery
arrangements, the respective principal amounts of the Securities to be purchased
by each of the Underwriters shall be as set forth in Schedule II hereto, less
the respective principal amounts of Contract Securities (as hereinafter defined)
determined as provided below.  Securities to be purchased by the Underwriters
are hereinafter called the "UNDERWRITERS' SECURITIES" and Securities to be
purchased pursuant to Delayed Delivery Contracts are hereinafter called
"CONTRACT SECURITIES."  At the time of the purchase of the Underwriters'
Securities, the Company will pay to the Representatives, for the respective
accounts of the Underwriters, the aggregate underwriting commission in respect
thereof set forth in Schedule I hereto by accepting from the Underwriters in
payment for the Underwriters' Securities certified or official bank check or
checks payable to the order of the Company in the funds set forth in Schedule I
hereto in an amount equal to the aggregate initial price to public of the
Underwriters' Securities set forth in Schedule I hereto, less such underwriting
commission, unless the Representatives and the Company shall agree on another
manner of payment.

         If so provided in Schedule I hereto, the Underwriters are authorized
to solicit offers to purchase the Securities from the Company pursuant to
delayed delivery contracts ("DELAYED DELIVERY CONTRACTS") substantially in the
form of Schedule III hereto, but with such changes therein as the Company may
authorize or approve.  If so provided, the Underwriters will endeavor to make
such arrangements and, as compensation therefor, the Company will pay to the



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<PAGE>

Representatives, for the respective accounts of the Underwriters, on the Closing
Date, by certified or official bank check payable in the funds set forth in
Schedule I hereto, the delayed delivery fee set forth in Schedule I hereto with
respect to the Securities for which Delayed Delivery Contracts are made.
Delayed Delivery Contracts are to be solicited from and made only with
institutional investors, including commercial and savings banks, insurance
companies, pension funds, investment companies and educational and charitable
institutions.  The Company will enter into Delayed Delivery Contracts in all
cases where sales of Contract Securities arranged by the Underwriters have been
previously approved by the Company, but, except as the Company may otherwise
agree, each such Delayed Delivery Contract must be for not less than the minimum
principal amount set forth in Schedule I hereto and the aggregate principal
amount of the Contract Securities may not exceed the maximum aggregate principal
amount set forth in Schedule I hereto.  The Underwriters will not have any
responsibility in respect of the validity or performance of Delayed Delivery
Contracts.

         The respective principal amounts of the Securities to be purchased by
each Underwriter as set forth in Schedule II hereto shall be reduced by an
amount which shall bear the same proportion to the aggregate principal amount of
the Contract Securities as the principal amount of the Securities so set forth
opposite the name of such Underwriter bears to the aggregate principal amount of
the Securities set forth in Schedule II hereto, except to the extent that the
Representatives shall determine that such reduction shall be otherwise than in
such proportion and shall so advise the Company in writing; PROVIDED, HOWEVER,
that the aggregate principal amount of the Securities to be purchased by all
Underwriters pursuant to this Agreement shall be the aggregate principal amount
of the Securities set forth in Schedule II hereto, less the aggregate principal
amount of the Contract Securities.

         3.  DELIVERY AND PAYMENT.  Delivery of and payment for the
Underwriters' Securities shall be made in the funds, at the office, on the date
and at the time specified in Schedule I hereto, which date and time may be
accelerated or postponed by agreement between the Representatives and the
Company or as provided in Section 10 (such date and time of delivery and payment
for the Underwriters' Securities being herein called the "CLOSING DATE").
Delivery of the Underwriters' Securities shall be made to the Representatives,
for the respective accounts of the Underwriters, against payment by the several
Underwriters through the Representatives of the purchase price therefor to the
Company by wire transfer of such funds to an account specified in writing by the
Company.  Certificates for the Underwriters' Securities shall be registered in
the name "Cede & Co." not less than one business day in advance of the Closing
Date and shall be held in safekeeping with The Depository Trust Company ("DTC")
or its agent, subject to release by the Trustee at the Closing.

         The Company agrees to have the Underwriters' Securities available for
inspection, checking and packaging by the Representatives at the closing
location specified in Schedule I hereto not later than 1:00 p.m. on the business
day prior to the Closing Date.

         4.  OFFERING BY UNDERWRITERS.  It is understood that the several
Underwriters propose to offer the Securities for sale as set forth in the Final
Prospectus.



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<PAGE>

         5.   AGREEMENTS.  The Company agrees with the several Underwriters
that:

         (a)  Prior to the termination of the offering of the Securities, the
    Company will not file with the Commission any amendment to the Registration
    Statement or any supplement (including the Final Prospectus) of the Basic
    Prospectus unless the Company shall have furnished the Representatives a
    copy for their review prior to filing.  Subject to the preceding sentence,
    the Company will cause the Final Prospectus to be filed (or transmitted for
    filing) with the Commission pursuant to Rule 424 under the Act.  The
    Company will promptly advise the Representatives (i) when the Final
    Prospectus shall have been filed (or transmitted for filing) with the
    Commission pursuant to such Rule 424, (ii) when any amendment to the
    Registration Statement relating to the Securities shall have become
    effective, (iii) of any request by the Commission for any amendment to the
    Registration Statement or any amendment to or supplement of the Final
    Prospectus or for any additional information, (iv) of the issuance by the
    Commission of any stop order suspending the effectiveness of the
    Registration Statement or of the institution or threatening of any
    proceeding for such purpose and (v) of the receipt by the Company of any
    notification with respect to the suspension of the qualification of the
    Securities for sale in any jurisdiction or of the institution or
    threatening of any proceeding for such purpose.  The Company will use its
    best efforts to prevent the issuance of any such stop order and, if issued,
    to obtain as soon as possible the withdrawal thereof.

         (b)  If, at any time when a prospectus relating to the Securities is
    required to be delivered under the Act, any event has occurred as a result
    of which the Final Prospectus as then amended or supplemented would include
    any untrue statement of a material fact or omit to state any material fact
    necessary to make the statements therein, in the light of the circumstances
    under which they were made, not misleading, or if it shall be necessary to
    amend or supplement the Registration Statement or the Final Prospectus to
    comply with the Act, the Exchange Act or the respective rules thereunder,
    the Company promptly will prepare and file with the Commission, subject to
    the first sentence of paragraph (a) of this Section 5, an amendment or
    supplement which will correct such statement or omission or an amendment or
    supplement which will effect such compliance.

         (c)  As soon as practicable, but not later than 45 days after the end
    of the 12-month period beginning at the end of the current fiscal quarter
    of the Company, the Company will make generally available to its security
    holders and to the Representatives an earnings statement (which need not be
    audited) of the Company and its consolidated subsidiaries which will
    satisfy the provisions of Section 11(a) of the Act.

         (d)  The Company will furnish to the Representatives and counsel for
    the Underwriters, without charge, (i) one signed copy of the registration
    statement as originally filed (including exhibits thereto other than
    exhibits incorporated by reference therein) and of each amendment thereto
    which shall become effective on or prior to the Closing Date, (ii) one
    conformed copy for each Underwriter of the registration statement as
    originally filed (including exhibits thereto other than exhibits
    incorporated by reference therein) and of each amendment thereto which
    shall become effective on or prior to the



                                        - 5 -
<PAGE>

    Closing Date and (iii) so long as delivery of a prospectus relating to the
    Securities by an Underwriter or dealer may be required by the Act, as many
    copies of any Preliminary Final Prospectus and the Final Prospectus and any
    amendments thereto and supplements thereof as the Representatives may
    reasonably request.  The Company will pay the expenses of printing or
    otherwise producing all documents relating to the offering of the
    Securities and all other costs and taxes incident to the issuance and
    original delivery of the Securities.

         (e)  The Company will cooperate with the Underwriters, and will
    reimburse the Underwriters for their expenses (including the reasonable
    fees and disbursements of Sidley & Austin), in arranging for the
    qualification of the Securities for sale under the laws of such
    jurisdictions as the Representatives may reasonably designate, will use its
    best efforts to maintain such qualifications in effect so long as required
    for the distribution of the Securities and will reimburse the Underwriters
    for their expenses (including the reasonable fees and disbursements of
    Sidley & Austin) in arranging for the determination of the legality of the
    Securities for purchase by institutional investors; PROVIDED, HOWEVER, that
    the Company shall not be obligated hereby to execute or file any general
    consent to service of process under the laws of any jurisdiction or to
    qualify to do business as a foreign corporation in any jurisdiction.

         (f)  Until the business day following the Closing Date, the Company
    will not, without the consent of the Representatives, offer, sell or
    contract to sell, or announce the offering of, any debt securities covered
    by the Registration Statement or any other registration statement filed by
    the Company under the Act.

         6.  CONDITIONS TO THE OBLIGATIONS OF THE UNDERWRITERS. The obligations
of the Underwriters to purchase the Underwriters' Securities shall be subject to
the accuracy in all material respects of the representations and warranties of
the Company contained herein as of the date hereof, as of the time of the
effectiveness of any amendment to the Registration Statement (including the
filing of any document incorporated by reference therein) filed after the date
hereof and prior to the Closing Date and as of the Closing Date, to the accuracy
in all material respects of the statements of the Company made in any
certificates delivered pursuant to the provisions hereof, to the performance in
all material respects by the Company of its obligations hereunder and to the
following additional conditions:

         (a)  No stop order suspending the effectiveness of the Registration
    Statement, as amended from time to time after the date hereof and prior to
    the Closing Date, shall have been issued and no proceedings for such
    purpose shall have been instituted or, to the best knowledge of the
    Company, threatened; and the Final Prospectus shall have been filed (or
    transmitted for filing) with the Commission pursuant to Rule 424 under the
    Act not later than 5:00 p.m., Chicago time, on the business day following
    the date hereof.

         (b)  The Indenture shall be qualified under the Trust Indenture Act.

         (c)  There shall be in full force and effect one or more orders of the
    Minnesota Commission authorizing, among other things, (i) the Company's
    proposed capital structure



                                        - 6 -
<PAGE>

    after the issuance and sale by the Company of the Securities and other
    securities therein mentioned and (ii) the issue and sale of the Securities
    by the Company on terms and conditions not inconsistent with the terms and
    conditions set forth in or contemplated by this Agreement and any Delayed
    Delivery Contract, and containing no provisions unacceptable to the
    Representatives, it being agreed that the order or orders of the Minnesota
    Commission heretofore issued as described in paragraph (c) of Section 1
    contain no such unacceptable provisions.

         (d)  The Company shall have furnished to the Representatives the
    opinion, dated the Closing Date, of Dorsey & Whitney LLP, counsel for the
    Company, to the effect that:

              (i)  the Company is a duly organized and validly existing
         corporation in good standing under the laws of the State of
         Minnesota and is duly qualified to transact business as a foreign
         corporation and is in good standing in the States of North Dakota
         and South Dakota;

              (ii)  the Company is a public utility as defined in the
         statutes of the States of Minnesota, North Dakota and South
         Dakota and is authorized by its Articles of Incorporation, as
         amended, to carry on the business in which it is engaged, as set
         forth in the Final Prospectus; the Company has the legal right to
         function and operate as an electric utility in the States of
         Minnesota, North Dakota and South Dakota; and the Company is
         subject as to rates, issuance of securities, service and other
         matters to the jurisdiction of certain authorities as and to the
         extent stated in such Annual Report under the caption
         "Business--(c) Narrative Description of Business--Electric
         Operations--General Regulation";

              (iii)  except for four municipalities having an aggregate
         population of less than 15,000, according to the 1990 census, the
         Company has valid and subsisting franchises covering all
         municipalities with more than 1,000 population, according to the
         1990 census, which authorize the Company to carry on the
         respective utility businesses in which it is engaged in the
         municipalities covered by such franchises;

              (iv)  the Indenture is qualified under the Trust Indenture
         Act;

              (v)  the Indenture is in due and proper form, has been duly
         and validly authorized by all necessary corporate action, has
         been duly and validly executed and delivered and is a valid
         instrument legally binding on the Company;

              (vi)  the form and terms of the Securities have been
         established in conformity with the provisions of the Indenture,
         and the Securities are in due and proper form; the issue and sale
         of the Securities by the Company in accordance with the terms of
         this Agreement and any Delayed Delivery



                                        - 7 -
<PAGE>

         Contracts have been duly and validly authorized by the necessary
         corporate action; the Securities, when duly executed and authenticated
         in accordance with the provisions of the Indenture and delivered to
         and paid for by the Underwriters pursuant to this Agreement, in the
         case of the Underwriters' Securities, or by the purchasers thereof
         pursuant to Delayed Delivery Contracts, in the case of any Contract
         Securities, will constitute legal, valid and binding obligations of
         the Company enforceable in accordance with their terms, except as
         enforcement thereof may be limited by bankruptcy, insolvency or other
         laws affecting the enforcement of creditors' rights generally or by
         general principles of equity, and will be entitled to the benefits
         provided by the Indenture (subject to the exception stated above); and
         the Securities and the Indenture conform as to legal matters with the
         statements concerning them made in the Final Prospectus, and such
         statements accurately set forth the matters respecting the Securities
         and the Indenture required to be set forth in the Final Prospectus;

              (vii)  the order or orders of the Minnesota Commission
         referred to in paragraph (c) of this Section 6 have been duly
         entered and, to the best knowledge of such counsel, are still in
         force and effect; and no further approval, authorization,
         consent, certificate or order of any state or federal commission
         or regulatory authority is necessary with respect to the
         execution and delivery of the Indenture or the issue and sale of
         the Securities as contemplated herein and in any Delayed Delivery
         Contracts (except that the sale of the Securities in certain
         jurisdictions may be subject to the securities or "Blue Sky" laws
         thereof);

              (viii)  the Registration Statement and any amendments
         thereto filed under the Act (including the documents which upon
         filing by the Company with the Commission will be incorporated by
         reference in the Registration Statement) prior to the Closing
         Date have become effective under the Act; to the best knowledge
         of such counsel, no stop order suspending the effectiveness of
         the Registration Statement, as so amended, has been issued and no
         proceedings for such purpose have been instituted or threatened;
         and the Registration Statement, the Final Prospectus and each
         amendment thereto or supplement thereof, if any, as of their
         respective effective or issue dates (other than the financial
         statements and other financial and statistical information
         contained therein, as to which such counsel need express no
         opinion), complied as to form in all material respects with the
         applicable requirements of the Act, the Exchange Act and the
         respective rules thereunder; and although such counsel assumes no
         responsibility for the accuracy, completeness or fairness of
         statements contained in the Registration Statement, or any
         amendment thereto, or the Final Prospectus, or any amendment
         thereto or supplement thereof, except as expressly stated in such
         counsel's opinion pursuant to the requirements of this paragraph
         (d), such counsel has no reason to believe that the Registration



                                        - 8 -
<PAGE>

         Statement, at the date of this Agreement, or any amendment thereto, at
         the time it became effective (other than the financial statements and
         other financial and statistical information contained therein, as to
         which such counsel need express no opinion), contained any untrue
         statement of a material fact or omitted to state any material fact
         required to be stated therein or necessary to make the statements
         therein not misleading or that the Final Prospectus, or any amendment
         thereto or supplement thereof, as of their respective issue dates
         (other than the financial statements and other financial and
         statistical information contained therein, as to which such counsel
         need express no opinion), included any untrue statement of a material
         fact or omitted to state a material fact required to be stated therein
         or necessary to make the statements therein, in the light of the
         circumstances under which they were made, not misleading;

              (ix)  this Agreement and any Delayed Delivery Contracts have
         been duly authorized by all requisite corporate action, executed
         and delivered by the Company;

              (x)  neither the issue and sale of the Securities nor the
         consummation of any of the other transactions herein contemplated,
         including the fulfillment of the terms hereof or of any Delayed
         Delivery Contracts, will conflict with, result in a breach of or
         constitute a default under the Articles of Incorporation, as amended,
         or By-laws of the Company or any indenture or other agreement or
         instrument known to such counsel and to which the Company is a party
         or by which the Company or any of its property is bound;

              (xi)  to the best knowledge of such counsel, there is no
         legal or governmental proceeding and no franchise, contract or
         other document of a character required to be described in the
         Registration Statement or the Final Prospectus, or to be filed as
         an exhibit to the Registration Statement, which is not described
         or filed as required;

              (xii)  the statements contained in the Registration
         Statement, the Final Prospectus and each amendment thereto or
         supplement thereof, if any, which are expressed therein to have
         been made on the authority of such counsel have been reviewed by
         them and, as to matters of law and legal conclusions, are
         correct; and

              (xiii)  the Company has a duly authorized share
         capitalization as set forth under the caption "Capitalization" in
         the consolidated balance sheet of the Company at December 31,
         1996 included in the Company's Annual Report on Form 10-K for the
         year ended December 31, 1996 and incorporated by reference in the
         Final Prospectus or any amendment thereto or supplement thereof.




                                        - 9 -
<PAGE>

         (e)  The Company shall have furnished to the Representatives the
    opinion, dated the Closing Date, of Jay D. Myster, Senior Vice President,
    Governmental and Legal of the Company, to the effect that:

              (i)  except as disclosed in the Final Prospectus as then
         amended or supplemented, there are no actions, suits,
         investigations or proceedings at law or in equity or before or by
         any court, public board or body pending or, to the best knowledge
         of such counsel, threatened against the Company or any
         subsidiary, wherein an unfavorable decision, ruling or finding
         would have a material adverse effect on the transactions
         contemplated by this Agreement, the Registration Statement and
         the Final Prospectus or on the validity or enforceability against
         the Company of this Agreement, the Indenture or the Securities;

              (ii)  to the best knowledge of such counsel, the
         descriptions included in the Registration Statement, the Final
         Prospectus and each amendment thereto or supplement thereof, if
         any, as of their respective effective or issue dates, of
         statutes, legal and other governmental proceedings and of
         franchises, contracts and other documents are accurate and fairly
         present the information required to be shown;

              (iii)  each of Minnesota Dakota Generating Company ("MDGC"),
         Mid-States Development, Inc. ("MDI"), Quadrant Co. ("QC"),
         Diagnostic Medical Systems, Inc. ("DMSI") and North Central
         Utilities, Inc. ("NCUI") is a duly organized and validly existing
         corporation in good standing under the laws of its jurisdiction
         of incorporation, with full corporate power and authority to
         carry on its business as now conducted; and

              (iv)  all of the issued and outstanding capital stock of
         MDGC is validly issued, fully paid and non-assessable and (except
         for directors' qualifying shares) is owned beneficially and of
         record by the Company free and clear of all liens, pledges and
         encumbrances; all of the issued and outstanding capital stock of
         each of MDI, QC and NCUI is validly issued, fully paid and
         non-assessable and is owned beneficially and of record by MDGC
         free and clear of all liens, pledges and encumbrances; and all of
         the issued and outstanding capital stock of DMSI is validly
         issued, fully paid and non-assessable and is owned beneficially
         and of record by MDI free and clear of all liens, pledges and
         encumbrances.

         (f)  The Representatives shall have received from Sidley & Austin,
    counsel for the Underwriters, such opinion or opinions, dated the Closing
    Date, with respect to the issue and sale of the Securities, the Indenture,
    any Delayed Delivery Contracts, the Registration Statement, the Final
    Prospectus, each amendment thereto or supplement thereof, if any, and other
    related matters as the Representatives may reasonably require, and the
    Company shall have furnished to such counsel such documents as they
    reasonably request for the


                                        - 10 -
<PAGE>

    purpose of enabling them to pass upon such matters.  For purposes of their
    opinion, Sidley & Austin shall be entitled to rely upon the opinion of
    Dorsey & Whitney LLP, counsel for the Company, as to matters governed by
    Minnesota law, and shall be entitled to rely upon such opinion as to the
    organization and existence of the Company.

         (g)  The Company shall have furnished to the Representatives a
    certificate, dated the Closing Date, of the Company, signed by its
    President or any Vice President and by its principal financial or
    accounting officer, to the effect that the signers of such certificate have
    carefully examined the Registration Statement, the Final Prospectus and
    each amendment thereto or supplement thereof, if any, and this Agreement
    and that:

              (i)  the representations and warranties of the Company
         contained in this Agreement are true and correct in all material
         respects on and as of the Closing Date with the same effect as if
         made on the Closing Date, and the Company has in all material
         respects complied with all the agreements and satisfied all the
         conditions on its part to be performed or satisfied hereunder at
         or prior to the Closing Date;

              (ii)  the order or orders of the Minnesota Commission
         referred to in paragraph (c) of this Section 6 have been duly
         entered and are still in full force and effect;

              (iii)  no stop order suspending the effectiveness of the
         Registration Statement, as amended prior to the Closing Date, has
         been issued and no proceedings for such purpose have been
         instituted or, to the best knowledge of the Company, threatened;
         and

              (iv)  since the date of the most recent financial statements
         included in the Final Prospectus, there has been no material
         adverse change in the condition (financial or other), earnings,
         business or properties of the Company and its subsidiaries, taken
         as a whole, whether or not arising from transactions in the
         ordinary course of business, and no dividends (other than regular
         quarterly dividends on the Company's Cumulative Preferred Shares
         and Common Shares) have been declared or paid on, or other
         distribution declared or made on, the outstanding shares of the
         Company, except in each case as set forth or contemplated in the
         Final Prospectus.

         (h)  At the Closing Date, Deloitte & Touche LLP shall have furnished
    to the Representatives a letter, dated the Closing Date, in form and
    substance reasonably satisfactory to the Representatives, confirming that
    they are independent accountants within the meaning of the Act and the
    Exchange Act and the respective applicable published rules and regulations
    thereunder and stating in effect that:


                                        - 11 -
<PAGE>

              (i)  in their opinion the audited consolidated financial
         statements and financial statement schedules included or
         incorporated by reference in the Registration Statement and the
         Final Prospectus and reported on by them comply as to form in all
         material respects with the applicable accounting requirements of
         the Exchange Act and the published rules and regulations
         thereunder;

              (ii)  on the basis of a reading of the latest unaudited
         consolidated financial statements made available by the Company,
         the carrying out of certain specified procedures (but not an
         examination in accordance with generally accepted auditing
         standards) which would not necessarily reveal matters of
         significance with respect to the comments set forth in such
         letter, a reading of the minutes of the meetings of the
         shareholders and the Board of Directors (and any committees
         thereof) of the Company and its subsidiaries and inquiries of
         certain officials of the Company who have responsibility for
         financial and accounting matters of the Company and its
         subsidiaries as to transactions and events subsequent to the date
         of the most recent audited consolidated financial statements
         included or incorporated by reference in the Final Prospectus,
         nothing came to their attention which caused them to believe
         that:

                   (A) any unaudited consolidated financial
              statements included or incorporated by reference in the
              Registration Statement and the Final Prospectus do not
              comply as to form in all material respects with the
              applicable accounting requirements of the Exchange Act
              and the published rules and regulations thereunder;

                   (B)  with respect to the interim period subsequent
              to the date of the most recent consolidated financial
              statements (other than any capsule information),
              audited or unaudited, included or incorporated by
              reference in the Registration Statement and the Final
              Prospectus:  there were any changes at a specified date
              (not more than five business days prior to the date of
              such letter) in the long-term debt (other than any
              purchases of First Mortgage Bonds for sinking fund
              purposes) or capital stock (other than any purchases
              pursuant to the Automatic Dividend Reinvestment and
              Share Purchase Plan or of Cumulative Preferred Shares
              for sinking fund purposes) of the Company, or any
              decrease in the net assets of the Company, as compared
              with the amounts shown on the most recent consolidated
              balance sheet included or incorporated by reference in
              the Registration Statement and the Final Prospectus; or
              for the period from the date of such most recent
              consolidated financial


                                        - 12 -
<PAGE>

              statements to such specified date, there were any decreases, as
              compared with the corresponding period in the preceding year, in
              consolidated operating revenues, consolidated operating income,
              consolidated net income or net income per average common share
              outstanding of the Company; except in all instances for changes
              or decreases which the Registration Statement and the Final
              Prospectus disclose have occurred or may occur or which are set
              forth in such letter; and

                   (C)  they have performed certain other specified
              procedures as a result of which they have determined
              that certain information of an accounting, financial or
              statistical nature (which is limited to accounting,
              financial or statistical information derived from the
              general accounting records of the Company) set forth in
              the Registration Statement and the Final Prospectus,
              including Exhibit 12-A to the Registration Statement,
              agrees with the accounting records of the Company,
              excluding any questions of legal interpretation.

         (i)  Subsequent to the respective dates as of which information is
    given in the Registration Statement and the Final Prospectus, there shall
    not have been (i) any change or decrease of the character referred to in
    paragraph (h)(ii)(B) of this Section 6 or (ii) any change, or any
    development involving a prospective change, in or affecting the business or
    properties of the Company, the effect of which, in any case referred to in
    clause (i) or (ii), is, in the reasonable judgment of the Representatives,
    so material and adverse as to make it impractical or inadvisable to proceed
    with the offering or the delivery of the Securities as contemplated by the
    Registration Statement and the Final Prospectus.

         (j)  Subsequent to the execution of this Agreement, there shall not
    have been any decrease in the ratings of any of the Company's debt
    securities by Moody's Investors Service, Inc., Standard & Poor's Ratings
    Group or Fitch Investors Services.

         (k)  The Company shall have accepted Delayed Delivery Contracts in any
    case where sales of Contract Securities arranged by the Underwriters have
    been approved by the Company.

         If any of the conditions specified in this Section 6 shall not have
been fulfilled in all material respects when and as provided in this Agreement,
or if any of the opinions and certificates mentioned above or elsewhere in this
Agreement shall not be in all material respects reasonably satisfactory in form
and substance to the Representatives and their counsel, this Agreement and all
obligations of the Underwriters hereunder may be canceled at, or any time prior
to, the Closing Date by the Representatives.  Notice of such cancellation shall
be given to the Company in writing or by telephone or telegraph, promptly
confirmed in writing.


                                        - 13 -
<PAGE>

         7.  CONDITIONS TO THE OBLIGATION OF THE COMPANY.  The obligation of
the Company to deliver the Securities shall be subject to the following
conditions:

         (a)  No stop order suspending the effectiveness of the Registration
    Statement, as amended from time to time after the date hereof and prior to
    the Closing Date, shall have been issued and no proceedings for such
    purpose shall have been instituted or, to the best knowledge of the
    Company, threatened.

         (b)  The Indenture shall be qualified under the Trust Indenture Act.

         (c)  There shall be in full force and effect one or more orders of the
    Minnesota Commission authorizing, among other things, (i) the Company's
    proposed capital structure after the issuance and sale by the Company of
    the Securities and other securities therein mentioned and (ii) the issue
    and sale of the Securities by the Company on terms and conditions not
    inconsistent with the terms and conditions set forth in or contemplated by
    this Agreement or any Delayed Delivery Contract, and containing no
    provisions unacceptable to the Company, it being agreed that the order or
    orders of the Minnesota Commission heretofore issued as described in
    paragraph (c) of Section 1 contain no such unacceptable provisions.

         If any of the conditions specified in this Section 7 shall not have
been fulfilled in all material respects when and as provided in this Agreement,
this Agreement and the obligation of the Company to deliver the Securities
hereunder may be canceled at, or at any time prior to, the Closing Date by the
Company.  Notice of such cancellation shall be given to the Representatives in
writing or by telephone or telegraph, promptly confirmed in writing.

         8.  REIMBURSEMENT OF UNDERWRITERS' EXPENSES.  If the sale of the
Underwriters' Securities as provided herein is not consummated because any
condition to the obligations of the Underwriters set forth in Section 6 is not
satisfied, because any condition to the obligation of the Company set forth in
Section 7 is not satisfied, because of any termination pursuant to Section 11 or
because of any refusal, inability or failure on the part of the Company to
perform any agreement herein or to comply with any provision hereof other than
by reason of a default by any of the Underwriters, the Company will reimburse
the Underwriters severally, upon demand, for all out-of-pocket expenses
(including the reasonable fees and disbursements of Sidley & Austin) which shall
have been reasonably incurred by them in connection with the proposed purchase
and sale of the Securities.

         9.  INDEMNIFICATION AND CONTRIBUTION.  (a)  The Company agrees to
indemnify and hold harmless each Underwriter and each person who controls any
Underwriter within the meaning of the Act or the Exchange Act against any and
all losses, claims, damages or liabilities, joint or several, to which it or any
of them may become subject under the Act, the Exchange Act or otherwise, insofar
as such losses, claims, damages or liabilities (or actions, suits or proceedings
in respect thereof) arise out of or are based upon any untrue statement or
alleged untrue statement of a material fact contained in the registration
statement as originally filed, or in any amendment thereto, covering the
registration of the Securities, or in the Basic Prospectus, any Preliminary


                                        - 14 -
<PAGE>

Final Prospectus or the Final Prospectus, or in any amendment thereto or
supplement thereof, or arise out of or are based upon the omission or alleged
omission to state therein a material fact required to be stated therein or
necessary to make the statements therein, in the light of the circumstances
under which they were made, not misleading, and agrees to reimburse each such
indemnified person for any legal or other expenses reasonably incurred by it in
connection with investigating or defending any such loss, claim, damage,
liability, action, suit or proceeding; PROVIDED, HOWEVER, that (i) the Company
will not be liable in any such case to the extent that any such loss, claim,
damage or liability arises out of or is based upon any such untrue statement or
alleged untrue statement or omission or alleged omission made therein in
reliance upon and in conformity with written information furnished to the
Company by or on behalf of any Underwriter through the Representatives
specifically for use in connection with the preparation thereof, or arises out
of or is based upon the Statements of Eligibility (Forms T-1 and T-2) under the
Trust Indenture Act of the Trustee or the trustees under the Mortgage, and
(ii) such indemnity with respect to the Basic Prospectus or any Preliminary
Final Prospectus shall not inure to the benefit of any Underwriter (or any
person controlling such Underwriter) from whom the person asserting any such
loss, claim, damage or liability purchased the Securities which are the subject
thereof if such person did not receive a copy of the Final Prospectus (or the
Final Prospectus as amended or supplemented), excluding documents incorporated
therein by reference, at or prior to the confirmation of the sale of such
Securities to such person in any case where such delivery is required by the Act
and the untrue statement or the omission of a material fact contained in the
Basic Prospectus or any Preliminary Final Prospectus was corrected in the Final
Prospectus (or the Final Prospectus as amended or supplemented), provided that
the Company shall have delivered the Final Prospectus (or the Final Prospectus
as amended or supplemented) in a timely manner and in sufficient quantities, as
provided in Section 5(d), to permit such delivery by the Underwriters.  This
agreement of indemnity will be in addition to any liability which the Company
may otherwise have.

         (b)  Each Underwriter severally agrees to indemnify and hold harmless
the Company, each of its directors, each of its officers who signed the
Registration Statement and each person who controls the Company within the
meaning of the Act or the Exchange Act to the same extent as the foregoing
indemnity from the Company to each Underwriter, but only with reference to
written information furnished to the Company by or on behalf of such Underwriter
through the Representatives specifically for use in connection with the
preparation of the documents referred to in such foregoing indemnity.  This
agreement of indemnity will be in addition to any liability which any
Underwriter may otherwise have.

         (c)  Promptly after receipt by any person indemnified under this
Section 9 of notice of the commencement of any action, suit or proceeding, such
person will, if a claim in respect thereof is to be made against an indemnifying
party under this Section 9, notify such indemnifying party in writing of the
commencement thereof; but the omission so to notify such indemnifying party will
not relieve it from any liability which it may have to any indemnified person
otherwise than under this Section 9.  In case any such action, suit or
proceeding is brought against any person indemnified under this Section 9 and
such indemnified person notifies an indemnifying party of the commencement
thereof, such indemnifying party will be entitled to participate therein and, to
the extent that it may elect by written notice delivered to such indemnified
person


                                        - 15 -
<PAGE>

promptly after receiving the aforesaid notice from such indemnified person, to
assume the defense thereof, with counsel reasonably satisfactory to such
indemnified person; PROVIDED, HOWEVER, that if the defendants in any such
action, suit or proceeding include both such indemnified person and such
indemnifying party and such indemnified person shall have reasonably concluded
that there may be legal defenses available to it and/or other indemnified
persons which are different from or in addition to the defenses available to
such indemnifying party, the indemnified person or persons shall have the right
to select separate counsel to assert such legal defenses and to otherwise
participate in the defense of such action, suit or proceeding on behalf of such
indemnified person or persons.  Upon receipt of notice from such indemnifying
party to such indemnified person of the former's election so to assume the
defense of such action, suit or proceeding and approval by such indemnified
person of counsel, such indemnifying party will not be liable to such
indemnified person under this Section 9 for any legal or other expenses
subsequently incurred by such indemnified person in connection with the defense
thereof unless (i) such indemnified person shall have employed separate counsel
in connection with the assertion of legal defenses in accordance with the
proviso to the next preceding sentence (it being understood, however, that such
indemnifying party shall not be liable for the expenses of more than one
separate counsel, approved by the Representatives in the case of indemnification
under paragraph (a) of this Section 9), (ii) such indemnifying party shall not
have employed counsel reasonably satisfactory to such indemnified person to
represent such indemnified person within a reasonable time after notice of
commencement of such action, suit or proceeding or (iii) such indemnifying party
shall have authorized the employment of counsel for such indemnified person at
the expense of such indemnifying party; PROVIDED, HOWEVER, that if clause (i) or
(iii) above is applicable, the liability of such indemnifying party shall be
only in respect of the counsel specifically referred to in such clause (i) or
(iii).

         (d)  In order to provide for just and equitable contribution in
circumstances in which the indemnification provided for in paragraph (a) of this
Section 9 shall be due in accordance with its terms but for any reason shall be
held by a court to be unavailable from the Company on grounds of policy or
otherwise, the Company and the Underwriters shall contribute to the aggregate
losses, claims, damages and liabilities (including legal or other expenses
reasonably incurred in connection with investigating or defending against the
same) to which the Company and one or more of the Underwriters may be subject in
such proportion that the Underwriters shall be responsible for the portion
represented by the percentage which the aggregate underwriting commission shall
bear to the aggregate initial price to public specified in Schedule I hereto of
the Underwriters' Securities and the Company shall be responsible for the
balance; PROVIDED, HOWEVER, that (i) in no case shall any Underwriter (except as
may be provided in any agreement among underwriters relating to the offering of
the Securities) be responsible for any amount in excess of the underwriting
commission applicable to the Securities purchased by such Underwriter hereunder
and (ii) no person guilty of fraudulent misrepresentation (within the meaning of
Section 11(f) of the Act) shall be entitled to contribution from any person who
is not guilty of such fraudulent misrepresentation.  For purposes of this
paragraph (d), each person who controls an Underwriter within the meaning of the
Act or the Exchange Act shall have the same rights to contribution as such
Underwriter, and each person who controls the Company within the meaning of the
Act or the Exchange Act, each director of the Company and each officer of the
Company who shall have signed the Registration Statement shall have the same
rights to


                                        - 16 -
<PAGE>

contribution as the Company, subject in each case to clause (ii) of the
preceding sentence.  Any person entitled to contribution shall, promptly after
receipt of notice of the commencement of any action, suit or proceeding against
such person in respect of which a claim for contribution may be made against a
party or parties under this paragraph (d), notify such party or parties from
whom contribution may be sought, but the omission so to notify such party or
parties shall not relieve such party or parties from any other obligation it or
they may have otherwise than under this paragraph (d).

         10.  DEFAULT BY AN UNDERWRITER.  If one or more Underwriters shall
fail to purchase and pay for any of the Securities agreed to be purchased by
such Underwriter or Underwriters hereunder and such failure shall constitute a
default in the performance of its or their obligations under this Agreement, the
remaining Underwriters shall be obligated, severally, to purchase and pay for
(in the respective proportions which the principal amount of the Securities set
forth opposite their respective names in Schedule II hereto bears to the
aggregate principal amount of the Securities set forth opposite the names of all
the nondefaulting Underwriters) the Securities which the defaulting Underwriter
or Underwriters agreed but failed to purchase; PROVIDED, HOWEVER, that in the
event that the aggregate principal amount of the Securities which the defaulting
Underwriter or Underwriters agreed but failed to purchase shall exceed 10% of
the aggregate principal amount of the Securities set forth in Schedule II
hereto, the remaining Underwriters shall have the right to purchase all, but
shall not be under any obligation to purchase any, of the Securities; and if the
nondefaulting Underwriters shall not purchase all the Securities or if other
arrangements satisfactory to the Representatives and the Company for the
purchase of all the Securities shall not be made within 48 hours after such
default, this Agreement will terminate without any liability on the part of any
nondefaulting Underwriter or the Company.  In the event of a default by any
Underwriter as described in this Section 10 under circumstances where this
Agreement shall not be terminated, the Closing Date shall be postponed for such
period, not exceeding seven days, as the Representatives and the Company shall
determine in order that the required changes in the Registration Statement and
the Final Prospectus, or in any other documents or arrangements, may be
effected.  Nothing contained in this Agreement shall relieve any defaulting
Underwriter of its liability to the Company and any nondefaulting Underwriter
for damages occasioned by its default hereunder.

         11.  TERMINATION.  This Agreement shall be subject to termination in
the absolute discretion of the Representatives, by written notice given to the
Company prior to delivery of and payment for the Underwriters' Securities, if
prior to such time (i) trading in the Company's Common Shares shall have been
suspended by the Commission or the National Association of Securities Dealers,
Inc. or trading in securities generally on the New York Stock Exchange shall
have been suspended or limited or minimum prices shall have been established on
such Exchange, (ii) a banking moratorium shall have been declared by Federal,
New York State or Minnesota authorities or (iii) there shall have occurred any
outbreak or material escalation of hostilities or other calamity or crisis the
effect of which on the financial markets of the United States is such as to make
it, in the reasonable judgment of the Representatives, impracticable to market
the Securities.


                                        - 17 -
<PAGE>

         12.  REPRESENTATIONS AND INDEMNITIES TO SURVIVE.  The respective
agreements, representations, warranties, indemnities and other statements of the
Company, of the Representatives and of the Underwriters set forth in or made
pursuant to this Agreement will remain in full force and effect, regardless of
any investigation made by or on behalf of any Underwriter, any Representative,
the Company or any of the directors, officers or controlling persons referred to
in Section 9, and will survive delivery of and payment for the Securities.  The
provisions of Sections 8 and 9 shall survive the termination or cancellation of
this Agreement.

         13.  NOTICES.  All communications hereunder will be in writing and
effective only on receipt, and, if sent to the Representatives, will be mailed,
delivered or telegraphed and confirmed to them at the address specified in
Schedule I hereto; or, if sent to the Company, will be mailed, delivered or
telegraphed and confirmed to it at 215 South Cascade Street, Box 496, Fergus
Falls, Minnesota 56538-0496, Attention:  Vice President, Finance.

         14.  SUCCESSORS.  This Agreement will inure to the benefit of and be
binding upon the parties hereto and their respective successors and the
controlling persons, directors and officers referred to in Section 9, and no
other person will have any right or obligation hereunder; and no other person
(including a purchaser, as such, from any Underwriter of the Securities) shall
acquire or have any rights under or by virtue of this Agreement.

         15.  COUNTERPARTS.  This Agreement may be executed in any number of
counterparts and by different parties hereto on separate counterparts, each of
which counterparts, when so executed and delivered, shall be deemed to be an
original; and all of which counterparts shall, taken together, constitute one
and the same Agreement.

         16.  APPLICABLE LAW.  This Agreement will be governed by and construed
in accordance with the laws of the State of Minnesota.

                                        - 18 -
<PAGE>

         If the foregoing is in accordance with your understanding of our
agreement, please sign and return to us the enclosed duplicate hereof, whereupon
this letter and your acceptance shall represent a binding agreement among the
Company and the several Underwriters.


                        Very truly yours,

                        OTTER TAIL POWER COMPANY



                        By     /s/   Andrew E. Anderson
                          ---------------------------------------------------
                             Andrew E. Anderson
                             Vice President, Finance, and Treasurer


The foregoing Agreement is hereby confirmed
and accepted as of the date specified in
Schedule I hereto.

A.G. EDWARDS & SONS, INC.


By:    /s/ John Meiners
   ----------------------------------------
    John Meiners
    Vice President

For themselves and the other several Underwriters,
if any, named in Schedule II to the foregoing Agreement.


                                        - 19 -
<PAGE>

                                      SCHEDULE I


Underwriting Agreement dated November 18, 1997

Registration Statement No. 333-11153

Representatives of the Underwriters:   A.G. Edwards & Sons, Inc.

Address of Representatives:            One North Jefferson
                                       St. Louis, Missouri 63103

Title, Purchase Price and Description of the Securities:

    Title:                             Senior Debentures, 6.375% Series Due
                                       2007

    Principal amount:                  $50,000,000

    Purchase price:                    98.206% of principal amount, plus
                                       accrued interest from November 21, 1997

         Funds for payment:            Same day funds

    Underwriting commission
      (including aggregate dollar
      amount):                         0.375% of principal amount (aggregate
                                       dollar amount of $187,500)

    Initial price to public:           98.581% of principal amount, plus
                                       accrued interest from November 21, 1997

    Maturity:                          December 1, 2007

    Interest payment dates:            December 1 and June 1, commencing June
                                       1, 1998

    Sinking fund provisions:           None

    Optional redemption provisions:    None

    Other provisions:                  None


Closing Date, Time and Location:       November 21, 1997, at 10:00 a.m.
                                       (Minneapolis, Minnesota time), at the
                                       offices of Dorsey & Whitney LLP, 220
                                       South Sixth Street, Minneapolis,
                                       Minnesota 55402-1498

Delayed Delivery Arrangements:         Not Applicable


<PAGE>

                                     SCHEDULE II



                                          PRINCIPAL AMOUNT OF
UNDERWRITERS                           SECURITIES TO BE PURCHASED
- ------------                           --------------------------

A.G. Edwards & Sons, Inc.                       $50,000,000.00


<PAGE>

                                     SCHEDULE III

                              DELAYED DELIVERY CONTRACT

                                                            November      , 1997


Otter Tail Power Company
215 South Cascade Street
Box 496
Fergus Falls, Minnesota 56538-0496

Dear Sirs:

         The undersigned hereby agrees to purchase from Otter Tail Power
Company (the "COMPANY"), and the Company agrees to sell to the undersigned, on
_______________, 19__ (the "DELIVERY DATE"), $____________ principal amount of
the Company's Senior Debentures,     % Series Due 2007 (the "SECURITIES")
offered by the Company's Final Prospectus dated November      , 1997 (as amended
or supplemented), receipt of a copy of which is hereby acknowledged, at a
purchase price of _____% of the principal amount thereof, plus accrued interest,
if any, thereon from _______________, 1997, to the date of payment and delivery,
and on the further terms and conditions set forth in this contract.

         Payment for the Securities to be purchased by the undersigned
hereunder shall be made on or before 11:00 a.m., Minneapolis time, on the
Delivery Date to or upon the order of the Company in immediately available funds
at the office of                                       , upon delivery to the
undersigned of the Securities in definitive fully registered form and in such
authorized denominations and registered in such names as the undersigned may
request by written or telegraphic communication addressed to the Company not
less than five full business days prior to the Delivery Date.  If no request is
received, the Securities will be registered in the name of the undersigned and
issued in a denomination equal to the aggregate principal amount of the
Securities to be purchased by the undersigned hereunder.

         The obligation of the undersigned to take delivery of and make payment
for the Securities on the Delivery Date, and the obligation of the Company to
sell and deliver the Securities on the Delivery Date, shall be subject to the
conditions (and neither party shall incur any liability by reason of the failure
thereof) that (1) the purchase of the Securities to be made by  the undersigned
hereunder, which purchase the undersigned represents is not prohibited on the
date hereof, shall not on the Delivery Date be prohibited under the laws of the
jurisdiction to which the undersigned is subject and (2) the Company, on or
before the Delivery Date, shall have sold to certain underwriters (the
"UNDERWRITERS") such principal amount of the Securities as is to be sold to them
pursuant to the Underwriting Agreement referred to in the Final Prospectus
mentioned above.  Promptly after completion of such sale to the Underwriters,
the Company will mail or deliver to the undersigned at its address set forth
below notice to such effect, accompanied by a copy of the opinions of counsel
for the Company delivered to the Underwriters in connection therewith.


<PAGE>

         This contract will inure to the benefit of and be binding upon the
parties hereto and their respective successors, but will not be assignable by
either party hereto without the written consent of the other.


         It is understood that acceptance of this contract and other similar
contracts is in the Company's sole discretion and, without limiting the
foregoing, need not be on a first come, first served basis.  If this contract is
acceptable to the Company, it is requested that the Company sign the form of
acceptance below and mail or deliver one of the counterparts hereof to the
undersigned at its address set forth below.  This contract will become a binding
agreement between the Company and the undersigned, as of the date first above
written, when such counterpart is so mailed or delivered.

         This agreement shall be governed by, and construed in accordance with,
the laws of the State of Minnesota.

                        Very truly yours,



                        -----------------------------------
                        (Name of Purchaser)

                        By 
                            ---------------------------------
                               (Signature and Title of Officer)


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

                        -----------------------------------
                        (Address)

Accepted:

OTTER TAIL POWER COMPANY


By
    ------------------------------------
       (Authorized Signature)



<PAGE>

                                                                  EXHIBIT 4-D-11
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------

                                           
                                           
                                           
                                           
                                           
                                           
                               OTTER TAIL POWER COMPANY
                                           
                                          TO
                                           
                      FIRST TRUST NATIONAL ASSOCIATION, TRUSTEE
                                           
                                           
                                           
                                    -------------
                                           
                                           
                                           
                                      INDENTURE
                                           
                           (FOR UNSECURED DEBT SECURITIES)
                                           
                                           
                                           
                             DATED AS OF NOVEMBER 1, 1997
                                           
                                           
                                           
                                           
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------


<PAGE>

                                  TABLE OF CONTENTS
                                           

RECITAL OF THE COMPANY . . . . . . . . . . . . . . . . . . . . . . . .   1

                                     ARTICLE ONE
                                           
               Definitions and Other Provisions of General Application
                                           
SECTION 101.  Definitions. . . . . . . . . . . . . . . . . . . . . . .   1
         "Act"     . . . . . . . . . . . . . . . . . . . . . . . . . .   2
         "Affiliate" . . . . . . . . . . . . . . . . . . . . . . . . .   2
         "Authenticating Agent"  . . . . . . . . . . . . . . . . . . .   2
         "Authorized Officer"  . . . . . . . . . . . . . . . . . . . .   2
         "Board of Directors"  . . . . . . . . . . . . . . . . . . . .   2
         "Board Resolution"  . . . . . . . . . . . . . . . . . . . . .   2
         "Business Day"  . . . . . . . . . . . . . . . . . . . . . . .   3
         "Commission"  . . . . . . . . . . . . . . . . . . . . . . . .   3
         "Company" . . . . . . . . . . . . . . . . . . . . . . . . . .   3
         "Company Request" or "Company Order"  . . . . . . . . . . . .   3
         "Corporate Trust Office"  . . . . . . . . . . . . . . . . . .   3
         "corporation" . . . . . . . . . . . . . . . . . . . . . . . .   3
         "Defaulted Interest"  . . . . . . . . . . . . . . . . . . . .   3
         "Discount Security" . . . . . . . . . . . . . . . . . . . . .   3
         "Dollar" or "$" . . . . . . . . . . . . . . . . . . . . . . .   3
         "Eligible Obligations"  . . . . . . . . . . . . . . . . . . .   4
         "Event of Default"  . . . . . . . . . . . . . . . . . . . . .   4
         "Governmental Authority"  . . . . . . . . . . . . . . . . . .   4
         "Government Obligations"  . . . . . . . . . . . . . . . . . .   4
         "Holder"     4
         "Indenture" . . . . . . . . . . . . . . . . . . . . . . . . .   4
         "Interest Payment Date" . . . . . . . . . . . . . . . . . . .   5
         "Maturity"  . . . . . . . . . . . . . . . . . . . . . . . . .   5
         "Officer's Certificate" . . . . . . . . . . . . . . . . . . .   5
         "Opinion of Counsel"  . . . . . . . . . . . . . . . . . . . .   5
         "Outstanding" . . . . . . . . . . . . . . . . . . . . . . . .   5
         "Paying Agent"  . . . . . . . . . . . . . . . . . . . . . . .   6
         "Periodic Offering" . . . . . . . . . . . . . . . . . . . . .   7
         "Person"  . . . . . . . . . . . . . . . . . . . . . . . . . .   7
         "Place of Payment"  . . . . . . . . . . . . . . . . . . . . .   7
         "Predecessor Security"  . . . . . . . . . . . . . . . . . . .   7
         "Redemption Date" . . . . . . . . . . . . . . . . . . . . . .   7
         "Redemption Price"  . . . . . . . . . . . . . . . . . . . . .   7
         "Regular Record Date" . . . . . . . . . . . . . . . . . . . .   7


                                         -i-
<PAGE>

         "Required Currency" . . . . . . . . . . . . . . . . . . . . .   7
         "Responsible Officer" . . . . . . . . . . . . . . . . . . . .   7
         "Securities"  . . . . . . . . . . . . . . . . . . . . . . . .   7
         "Security Register" and "Security Registrar"  . . . . . . . .   7
         "Special Record Date" . . . . . . . . . . . . . . . . . . . .   8
         "Stated Interest Rate"  . . . . . . . . . . . . . . . . . . .   8
         "Stated Maturity" . . . . . . . . . . . . . . . . . . . . . .   8
         "Tranche" . . . . . . . . . . . . . . . . . . . . . . . . . .   8
         "Trust Indenture Act" . . . . . . . . . . . . . . . . . . . .   8
         "Trustee" . . . . . . . . . . . . . . . . . . . . . . . . . .   8
         "United States" . . . . . . . . . . . . . . . . . . . . . . .   8
    SECTION 102.   Compliance Certificates and Opinions. . . . . . . .   8
    SECTION 103.   Form of Documents Delivered to Trustee. . . . . . .   9
    SECTION 104.   Acts of Holders.  . . . . . . . . . . . . . . . . .  10
    SECTION 105.   Notices, Etc. to Trustee and Company. . . . . . . .  12
    SECTION 106.   Notice to Holders of Securities; Waiver.  . . . . .  13
    SECTION 107.   Conflict with Trust Indenture Act.  . . . . . . . .  14
    SECTION 108.   Effect of Headings and Table of Contents. . . . . .  14
    SECTION 109.   Successors and Assigns. . . . . . . . . . . . . . .  14
    SECTION 110.   Separability Clause.  . . . . . . . . . . . . . . .  14
    SECTION 111.   Benefits of Indenture.  . . . . . . . . . . . . . .  14
    SECTION 112.   Governing Law.  . . . . . . . . . . . . . . . . . .  14
    SECTION 113.   Legal Holidays. . . . . . . . . . . . . . . . . . .  14


                                     ARTICLE TWO
                                           
                                    Security Forms
                                           
    SECTION 201.   Forms Generally.  . . . . . . . . . . . . . . . . .  15
    SECTION 202.   Form of Trustee's Certificate of Authentication.  .  15


                                    ARTICLE THREE
                                           
                                    The Securities
                                           
    SECTION 301.   Amount Unlimited; Issuable in Series. . . . . . . .  16
    SECTION 302.   Denominations.  . . . . . . . . . . . . . . . . . .  20
    SECTION 303.   Execution, Authentication, Delivery and Dating. . .  20
    SECTION 304.   Temporary Securities. . . . . . . . . . . . . . . .  23
    SECTION 305.   Registration, Registration of Transfer
                   and Exchange. . . . . . . . . . . . . . . . . . . .  23
    SECTION 306.   Mutilated, Destroyed, Lost and Stolen Securities. .  25
    SECTION 307.   Payment of Interest; Interest Rights Preserved. . .  26


                                         -ii-
<PAGE>

    SECTION 308.   Persons Deemed Owners.  . . . . . . . . . . . . . .  27
    SECTION 309.   Cancellation by Security Registrar. . . . . . . . .  27
    SECTION 310.   Computation of Interest.  . . . . . . . . . . . . .  28
    SECTION 311.   Payment to Be in Proper Currency. . . . . . . . . .  28


                                     ARTICLE FOUR
                                           
                              Redemption of Securities 
                                           
    SECTION 401.   Applicability of Article. . . . . . . . . . . . . .  28
    SECTION 402.   Election to Redeem; Notice to Trustee.  . . . . . .  28
    SECTION 403.   Selection of Securities to Be Redeemed. . . . . . .  29
    SECTION 404.   Notice of Redemption. . . . . . . . . . . . . . . .  29
    SECTION 405.   Securities Payable on Redemption Date.  . . . . . .  31
    SECTION 406.   Securities Redeemed in Part.  . . . . . . . . . . .  31


                                     ARTICLE FIVE
                                           
                                    Sinking Funds 
                                           
    SECTION 501.   Applicability of Article. . . . . . . . . . . . . .  32
    SECTION 502.   Satisfaction of Sinking Fund Payments with 
                   Securities. . . . . . . . . . . . . . . . . . . . .  32
    SECTION 503.   Redemption of Securities for Sinking Fund.  . . . .  32


                                     ARTICLE SIX
                                           
                                      Covenants
                                           
    SECTION 601.   Payment of Principal, Premium and Interest. . . . .  33
    SECTION 602.   Maintenance of Office or Agency.  . . . . . . . . .  33
    SECTION 603.   Money for Securities Payments to Be Held
                   in Trust. . . . . . . . . . . . . . . . . . . . . .  34
    SECTION 604.   Corporate Existence.  . . . . . . . . . . . . . . .  36
    SECTION 605.   Maintenance of Properties.  . . . . . . . . . . . .  36
    SECTION 606.   Annual Officer's Certificate as to Compliance.  . .  36
    SECTION 607.   Waiver of Certain Covenants.  . . . . . . . . . . .  36


                                        -iii-
<PAGE>

                                    ARTICLE SEVEN
                                           
                             Satisfaction and Discharge 
                                           
    SECTION 701.   Satisfaction and Discharge of Securities. . . . . .  37
    SECTION 702.   Satisfaction and Discharge of Indenture.  . . . . .  40
    SECTION 703.   Application of Trust Money. . . . . . . . . . . . .  40


                                    ARTICLE EIGHT
                                           
                             Events of Default; Remedies
                                           
    SECTION 801.   Events of Default.  . . . . . . . . . . . . . . . .  41
    SECTION 802.   Acceleration of Maturity; Rescission and 
                   Annulment.  . . . . . . . . . . . . . . . . . . . .  43
    SECTION 803.   Collection of Indebtedness and Suits for Enforcement 
                   by Trustee. . . . . . . . . . . . . . . . . . . . .  44
    SECTION 804.   Trustee May File Proofs of Claim. . . . . . . . . .  44
    SECTION 805.   Trustee May Enforce Claims Without
                   Possession of Securities. . . . . . . . . . . . . .  45
    SECTION 806.   Application of Money Collected. . . . . . . . . . .  45
    SECTION 807.   Limitation on Suits.  . . . . . . . . . . . . . . .  46
    SECTION 808.   Unconditional Right of Holders to Receive
                   Principal, Premium and Interest.  . . . . . . . . .  47
    SECTION 809.   Restoration of Rights and Remedies. . . . . . . . .  47
    SECTION 810.   Rights and Remedies Cumulative. . . . . . . . . . .  47
    SECTION 811.   Delay or Omission Not Waiver. . . . . . . . . . . .  47
    SECTION 812.   Control by Holders of Securities. . . . . . . . . .  48
    SECTION 813.   Waiver of Past Defaults.  . . . . . . . . . . . . .  48
    SECTION 814.   Undertaking for Costs.  . . . . . . . . . . . . . .  49
    SECTION 815.   Waiver of Stay or Extension Laws. . . . . . . . . .  49


                                     ARTICLE NINE
                                           
                                     The Trustee 
                                           
    SECTION 901.   Certain Duties and Responsibilities.  . . . . . . .  49
    SECTION 902.   Notice of Defaults. . . . . . . . . . . . . . . . .  51
    SECTION 903.   Certain Rights of Trustee.  . . . . . . . . . . . .  51
    SECTION 904.   Not Responsible for Recitals or Issuance of
                   Securities. . . . . . . . . . . . . . . . . . . . .  52
    SECTION 905.   May Hold Securities.  . . . . . . . . . . . . . . .  53


                                         -iv-
<PAGE>

    SECTION 906.   Money Held in Trust.  . . . . . . . . . . . . . . .  53
    SECTION 907.   Compensation and Reimbursement. . . . . . . . . . .  53
    SECTION 908.   Disqualification; Conflicting Interests.  . . . . .  54
    SECTION 909.   Corporate Trustee Required; Eligibility.  . . . . .  54
    SECTION 910.   Resignation and Removal; Appointment of 
                   Successor.  . . . . . . . . . . . . . . . . . . . .  55
    SECTION 911.   Acceptance of Appointment by Successor. . . . . . .  57
    SECTION 912.   Merger, Conversion, Consolidation or
                   Succession to Business. . . . . . . . . . . . . . .  58
    SECTION 913.   Preferential Collection of
                   Claims Against Company. . . . . . . . . . . . . . .  58
    SECTION 914.   Co-trustees and Separate Trustees.  . . . . . . . .  59
    SECTION 915.   Appointment of Authenticating Agent.  . . . . . . .  60


                                     ARTICLE TEN

                  Holders' Lists and Reports by Trustee and Company 

    SECTION 1001.  Lists of Holders. . . . . . . . . . . . . . . . . .  63
    SECTION 1002.  Reports by Trustee and Company. . . . . . . . . . .  63


                                    ARTICLE ELEVEN
                                           
                 Consolidation, Merger, Conveyance or Other Transfer 
                                           
    SECTION 1101.  Company May Consolidate, Etc., Only on Certain 
                   Terms.  . . . . . . . . . . . . . . . . . . . . . .  63
    SECTION 1102.  Successor Corporation Substituted.  . . . . . . . .  64


                                    ARTICLE TWELVE
                                           
                               Supplemental Indentures 
                                           
    SECTION 1201.  Supplemental Indentures Without Consent of 
                   Holders.  . . . . . . . . . . . . . . . . . . . . .  64
    SECTION 1202.  Supplemental Indentures With Consent
                   of Holders. . . . . . . . . . . . . . . . . . . . .  67
    SECTION 1203.  Execution of Supplemental Indentures. . . . . . . .  68
    SECTION 1204.  Effect of Supplemental Indentures.  . . . . . . . .  68
    SECTION 1205.  Conformity With Trust Indenture Act.  . . . . . . .  69
    SECTION 1206.  Reference in Securities to Supplemental 
                   Indentures. . . . . . . . . . . . . . . . . . . . . .69
    SECTION 1207.  Modification Without Supplemental Indenture.  . . .  69


                                         -v-
<PAGE>

                                   ARTICLE THIRTEEN
                                           
                     Meetings of Holders; Action Without Meeting
                                           
    SECTION 1301.  Purposes for Which Meetings May Be Called.  . . . .  69
    SECTION 1302.  Call, Notice and Place of Meetings. . . . . . . . .  70
    SECTION 1303.  Persons Entitled to Vote at Meetings. . . . . . . .  70
    SECTION 1304.  Quorum; Action. . . . . . . . . . . . . . . . . . .  71
    SECTION 1305.  Attendance at Meetings; Determination of Voting 
                   Rights; Conduct and Adjournment of Meetings.  . . .  72
    SECTION 1306.  Counting Votes and Recording Action of Meetings.  .  73
    SECTION 1307.  Action Without Meeting. . . . . . . . . . . . . . .  73


                                   ARTICLE FOURTEEN
                                           
           Immunity of Incorporators, Stockholders, Officers and Directors 
                                           
    SECTION 1401.  Liability Solely Corporate. . . . . . . . . . . . .  74


TESTIMONIUM        . . . . . . . . . . . . . . . . . . . . . . . . . . .75

SIGNATURES AND SEALS . . . . . . . . . . . . . . . . . . . . . . . . . .75

ACKNOWLEDGMENTS    . . . . . . . . . . . . . . . . . . . . . . . . . . .76


                                         -vi-
<PAGE>

                               OTTER TAIL POWER COMPANY

              RECONCILIATION AND TIE BETWEEN TRUST INDENTURE ACT OF 1939
                     AND INDENTURE, DATED AS OF NOVEMBER 1, 1997
                                           
TRUST INDENTURE ACT SECTION                                    INDENTURE SECTION

Section 310   (a)(1)........................................................909
              (a)(2)........................................................909
              (a)(3).....................................................914(b)
              (a)(4).............................................Not Applicable
              (b)...........................................................908
               .............................................................910
Section 311   (a)...........................................................913
              (b)...........................................................913
              (c)...........................................................913
Section 312   (a)..........................................................1001
              (b)..........................................................1001
              (c)..........................................................1001
Section 313   (a)..........................................................1002
              (b)..........................................................1002
              (c)..........................................................1002
              (d)..........................................................1002
Section 314   (a)..........................................................1002
              (a)(4)........................................................606
              (b)................................................Not Applicable
              (c)(1)........................................................102
              (c)(2)........................................................102
              (c)(3).............................................Not Applicable
              (d)................................................Not Applicable
              (e)...........................................................102
Section 315   (a)...........................................................901
              ..............................................................903
              (b)...........................................................902
              (c)...........................................................901
              (d)...........................................................901
              (e)...........................................................814
Section 316   (a)...........................................................812
              ..............................................................813
              (a)(1)(A).....................................................802
              ..............................................................812
              (a)(1)(B).....................................................813
              (a)(2).............................................Not Applicable
              (b)...........................................................808
Section 317   (a)(1)........................................................803
              (a)(2)........................................................804
              (b)...........................................................603
Section 318   (a)...........................................................107



<PAGE>

    INDENTURE, dated as November 1, 1997 between OTTER TAIL POWER COMPANY, a
corporation duly organized and existing under the laws of the State of Minnesota
(herein called the "Company"), having its principal office at 215 South Cascade
Street, P.O. Box 496, Fergus Falls, Minnesota 56538, and First Trust National
Association, a national banking association organized and existing under the
laws of the United States of America, having its principal corporate trust
office at First Trust Center, 180 East Fifth Street, St. Paul, Minnesota 55101,
as Trustee (herein called the "Trustee").

                                RECITAL OF THE COMPANY
                                           
    The Company has duly authorized the execution and delivery of this
Indenture to provide for the issuance from time to time of its unsecured
debentures, notes or other evidences of indebtedness (herein called the
"Securities"), to be issued in one or more series as contemplated herein; and
all acts necessary to make this Indenture a valid agreement of the Company have
been performed.

    For all purposes of this Indenture, except as otherwise expressly provided
or unless the context otherwise requires, capitalized terms used herein shall
have the meanings assigned to them in Article One of this Indenture.

    NOW, THEREFORE, THIS INDENTURE WITNESSETH:

    For and in consideration of the premises and the purchase of the Securities
by the Holders thereof, it is mutually covenanted and agreed, for the equal and
proportionate benefit of all Holders of the Securities or of series thereof, as
follows:

                                     ARTICLE ONE
                                           
               DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION
                                           

SECTION 101.  DEFINITIONS.

    For all purposes of this Indenture, except as otherwise expressly provided
or unless the context otherwise requires:

         (a)  the terms defined in this Article have the meanings assigned to
    them in this Article and include the plural as well as the singular;

         (b)  all terms used herein without definition which are defined in the
    Trust Indenture Act, either directly or by reference therein, have the
    meanings assigned to them therein;

         (c)  all accounting terms not otherwise defined herein have the
    meanings assigned to them in accordance with generally accepted accounting 


<PAGE>

    principles in the United States, and, except as otherwise herein expressly
    provided, the term "generally accepted accounting principles" with respect
    to any computation required or permitted hereunder shall mean such
    accounting principles as are generally accepted in the United States at the
    date of such computation or, at the election of the Company from time to
    time, at the date of the execution and delivery of this Indenture;
    provided, however, that in determining generally accepted accounting
    principles applicable to the Company, the Company shall, to the extent
    required, conform to any order, rule or regulation of any administrative
    agency, regulatory authority or other governmental body having jurisdiction
    over the Company; and

         (d)  the words "herein", "hereof" and "hereunder" and other words of
    similar import refer to this Indenture as a whole and not to any particular
    Article, Section or other subdivision.

    Certain terms, used principally in Article Nine, are defined in that
Article.

    "ACT", when used with respect to any Holder of a Security, has the meaning
specified in Section 104.

    "AFFILIATE" of any specified Person means any other Person directly or
indirectly controlling or controlled by or under direct or indirect common
control with such specified Person.  For the purposes of this definition,
"control" when used with respect to any specified Person means the power to
direct the management and policies of such Person, directly or through one or
more intermediaries, whether through the ownership of voting securities, by
contract or otherwise; and the terms "controlling" and "controlled" have
meanings correlative to the foregoing.

    "AUTHENTICATING AGENT" means any Person (other than the Company or an
Affiliate of the Company) authorized by the Trustee to act on behalf of the
Trustee to authenticate one or more series of Securities.

    "AUTHORIZED OFFICER" means the Chairman of the Board, the President, any
Vice President, the Treasurer, any Assistant Treasurer or any other duly
authorized officer of the Company.

    "BOARD OF DIRECTORS" means either the board of directors of the Company or
any committee thereof duly authorized to act in respect of matters relating to
this Indenture.

    "BOARD RESOLUTION" means a copy of a resolution certified by the Secretary
or an Assistant Secretary of the Company to have been duly adopted by the Board
of Directors and to be in full force and effect on the date of such
certification, and delivered to the Trustee.


                                         -2-
<PAGE>

    "BUSINESS DAY", when used with respect to a Place of Payment or any other
particular location specified in the Securities or this Indenture, means any
day, other than a Saturday or Sunday, which is not a day on which banking
institutions or trust companies in such Place of Payment or other location are
generally authorized or required by law, regulation or executive order to remain
closed, except as may be otherwise specified as contemplated by Section 301.

    "COMMISSION" means the Securities and Exchange Commission, as from time to
time constituted, created under the Securities Exchange Act of 1934, as amended,
or, if at any time after the date of execution and delivery of this Indenture
such Commission is not existing and performing the duties now assigned to it
under the Trust Indenture Act, then the body, if any, performing such duties at
such time.

    "COMPANY" means the Person named as the "Company" in the first paragraph of
this Indenture until a successor Person shall have become such pursuant to the
applicable provisions of this Indenture, and thereafter "Company" shall mean
such successor Person.

    "COMPANY REQUEST" or "COMPANY ORDER" means a written request or order
signed in the name of the Company by an Authorized Officer and delivered to the
Trustee.

    "CORPORATE TRUST OFFICE" means the office of the Trustee at which at any
particular time its corporate trust business shall be principally administered,
which office at the date of execution and delivery of this Indenture is located
at First Trust Center, 180 East Fifth Street, St. Paul, Minnesota 55101.

    "CORPORATION" means a corporation, association, company, joint stock
company or business trust.

    "DEFAULTED INTEREST" has the meaning specified in Section 307.

    "DISCOUNT SECURITY" means any Security which provides for an amount less
than the principal amount thereof to be due and payable upon a declaration of
acceleration of the Maturity thereof pursuant to Section 802, and "INTEREST"
with respect to a Discount Security means interest, if any, borne by such
Security at a Stated Interest Rate.

    "DOLLAR" or "$" means a dollar or other equivalent unit in such coin or
currency of the United States as at the time shall be legal tender for the
payment of public and private debts.


                                         -3-
<PAGE>

    "ELIGIBLE OBLIGATIONS" means:
         (a)  with respect to Securities denominated in Dollars, Government
    Obligations; or

         (b)  with respect to Securities denominated in a currency other than
    Dollars or in a composite currency, such other obligations or instruments
    as shall be specified with respect to such Securities, as contemplated by
    Section 301.

    "EVENT OF DEFAULT" has the meaning specified in Section 801.

    "GOVERNMENTAL AUTHORITY" means the government of the United States or of
any State or Territory thereof or of the District of Columbia or of any county,
municipality or other political subdivision of any thereof, or any department,
agency, authority or other instrumentality of any of the foregoing.

    "GOVERNMENT OBLIGATIONS" means:

         (a)  direct obligations of, or obligations the timely payment of
    principal of and interest on which are unconditionally guaranteed by, the
    United States entitled to the benefit of the full faith and credit thereof;
    and

         (b)  certificates, depositary receipts or other instruments which
    evidence a direct ownership interest in obligations described in clause (a)
    above or in any specific interest or principal payments due in respect
    thereof; provided, however, that the custodian of such obligations or
    specific interest or principal payments shall be a bank or trust company
    (which may include the Trustee or any Paying Agent) subject to Federal or
    state supervision or examination with a combined capital and surplus of at
    least $50,000,000; and provided, further, that except as may be otherwise
    required by law, such custodian shall be obligated to pay to the holders of
    such certificates, depositary receipts or other instruments the full amount
    received by such custodian in respect of such obligations or specific
    payments and shall not be permitted to make any deduction therefrom.

    "HOLDER" means a Person in whose name a Security is registered in the
Security Register.

    "INDENTURE" means this instrument as originally executed and delivered and
as it may from time to time be supplemented or amended by one or more indentures
supplemental hereto entered into pursuant to the applicable provisions hereof
and shall include the terms of particular series of Securities established as
contemplated by Section 301.


                                         -4-
<PAGE>

    "INTEREST PAYMENT DATE", when used with respect to any Security, means the
Stated Maturity of an installment of interest on such Security.

    "MATURITY", when used with respect to any Security, means the date on which
the principal of such Security or an installment of principal becomes due and
payable as provided in such Security or in this Indenture, whether at the Stated
Maturity, by declaration of acceleration, upon call for redemption or otherwise.

    "OFFICER'S CERTIFICATE" means a certificate signed by an Authorized Officer
and delivered to the Trustee.

    "OPINION OF COUNSEL" means a written opinion of counsel, who may be counsel
for the Company, or other counsel acceptable to the Trustee.

    "OUTSTANDING", when used with respect to Securities, means, as of the date
of determination, all Securities theretofore authenticated and delivered under
this Indenture, except:

         (a)  Securities theretofore canceled by the Trustee or delivered to
    the Trustee for cancellation;

         (b)  Securities deemed to have been paid in accordance with Section
    701; and

         (c)  Securities which have been paid pursuant to Section 306 or in
    exchange for or in lieu of which other Securities have been authenticated
    and delivered pursuant to this Indenture, other than any such Securities in
    respect of which there shall have been presented to the Trustee proof
    satisfactory to it and the Company that such Securities are held by a bona
    fide purchaser or purchasers in whose hands such Securities are valid
    obligations of the Company;

provided, however, that in determining whether or not the Holders of the
requisite principal amount of the Securities Outstanding under this Indenture,
or the Outstanding Securities of any series or Tranche, have given any request,
demand, authorization, direction, notice, consent or waiver hereunder or whether
or not a quorum is present at a meeting of Holders of Securities,

         (x)  Securities owned by the Company or any other obligor upon the
    Securities or any Affiliate of the Company or of such other obligor (unless
    the Company, such Affiliate or such obligor owns all Securities Outstanding
    under this Indenture, or all Outstanding Securities of each such series and
    each such Tranche, as the case may be, determined without regard to this
    clause (x)) shall be disregarded and deemed not to be Outstanding, except
    that, 


                                         -5-
<PAGE>

    in determining whether the Trustee shall be protected in relying upon any
    such request, demand, authorization, direction, notice, consent or waiver
    or upon any such determination as to the presence of a quorum, only
    Securities which the Trustee knows to be so owned shall be so disregarded;
    provided, however, that Securities so owned which have been pledged in good
    faith may be regarded as Outstanding if the pledgee establishes to the
    satisfaction of the Trustee the pledgee's right so to act with respect to
    such Securities and that the pledgee is not the Company or any other
    obligor upon the Securities or any Affiliate of the Company or of such
    other obligor;

         (y)  the principal amount of a Discount Security that shall be deemed
    to be Outstanding for such purposes shall be the amount of the principal
    thereof that would be due and payable as of the date of such determination
    upon a declaration of acceleration of the Maturity thereof pursuant to
    Section 802; and

         (z)  the principal amount of any Security which is denominated in a
    currency other than Dollars or in a composite currency that shall be deemed
    to be Outstanding for such purposes shall be the amount of Dollars which
    could have been purchased by the principal amount (or, in the case of a
    Discount Security, the Dollar equivalent on the date determined as set
    forth below of the amount determined as provided in (y) above) of such
    currency or composite currency evidenced by such Security in each such case
    certified to the Trustee in an Officer's Certificate, based (1) on the
    average of the mean of the buying and selling spot rates quoted by three
    banks which are members of the New York Clearing House Association selected
    by the Company in effect at 11:00 A.M. (New York time) in The City of New
    York on the fifth Business Day preceding any such determination or (2) if
    on such fifth Business Day it shall not be possible or practicable to
    obtain such quotations from such three banks, on such other quotations or
    alternative methods of determination which shall be as consistent as
    practicable with the method set forth in (1) above;

provided, further, that, in the case of any Security the principal of which is
payable from time to time without presentment or surrender, the principal amount
of such Security that shall be deemed to be Outstanding at any time for all
purposes of this Indenture shall be the original principal amount thereof less
the aggregate amount of principal thereof theretofore paid.

    "PAYING AGENT" means any Person, including the Company, authorized by the
Company to pay the principal of and premium, if any, or interest, if any, on any
Securities on behalf of the Company.


                                         -6-
<PAGE>

    "PERIODIC OFFERING" means an offering of Securities of a series from time
to time any or all of the specific terms of which Securities, including without
limitation the rate or rates of interest, if any, thereon, the Stated Maturity
or Maturities thereof and the redemption provisions, if any, with respect
thereto, are to be determined by the Company or its agents upon the issuance of
such Securities.

    "PERSON" means any individual, corporation, partnership, joint venture,
trust or unincorporated organization or any Governmental Authority thereof.

    "PLACE OF PAYMENT", when used with respect to the Securities of any series,
or Tranche thereof, means the place or places, specified as contemplated by
Section 301, at which, subject to Section 602, principal of and premium, if any,
and interest, if any, on the Securities of such series or Tranche are payable.

    "PREDECESSOR SECURITY" of any particular Security means every previous
Security evidencing all or a portion of the same debt as that evidenced by such
particular Security; and, for the purposes of this definition, any Security
authenticated and delivered under Section 306 in exchange for or in lieu of a
mutilated, destroyed, lost or stolen Security shall be deemed (to the extent
lawful) to evidence the same debt as the mutilated, destroyed, lost or stolen
Security.

    "REDEMPTION DATE", when used with respect to any Security to be redeemed,
means the date fixed for such redemption by or pursuant to this Indenture.

    "REDEMPTION PRICE", when used with respect to any Security to be redeemed,
means the price at which it is to be redeemed pursuant to this Indenture.

    "REGULAR RECORD DATE" for the interest payable on any Interest Payment Date
on the Securities of any series means the date specified for that purpose as
contemplated by Section 301.

    "REQUIRED CURRENCY" has the meaning specified in Section 311.

    "RESPONSIBLE OFFICER", when used with respect to the Trustee, means any
officer of the Trustee assigned by the Trustee to administer its corporate trust
matters.

    "SECURITIES" has the meaning stated in the first recital of this Indenture
and more particularly means any securities authenticated and delivered under
this Indenture.

    "SECURITY REGISTER" and "SECURITY REGISTRAR" have the respective meanings
specified in Section 305.


                                         -7-
<PAGE>

    "SPECIAL RECORD DATE" for the payment of any Defaulted Interest on the
Securities of any series means a date fixed by the Trustee pursuant to Section
307.

    "STATED INTEREST RATE" means a rate (whether fixed or variable) at which an
obligation by its terms is stated to bear simple interest.  Any calculation or
other determination to be made under this Indenture by reference to the Stated
Interest Rate on a Security shall be made without regard to the effective
interest cost to the Company of such Security and without regard to the Stated
Interest Rate on, or the effective cost to the Company of, any other
indebtedness the Company's obligations in respect of which are evidenced or
secured in whole or in part by such Security.

    "STATED MATURITY", when used with respect to any obligation or any
installment of principal thereof or interest thereon, means the date on which
the principal of such obligation or such installment of principal or interest is
stated to be due and payable (without regard to any provisions for redemption,
prepayment, acceleration, purchase or extension).

    "TRANCHE" means a group of Securities which (a) are of the same series and
(b) have identical terms except as to principal amount and/or date of issuance.

    "TRUST INDENTURE ACT" means, as of any time, the Trust Indenture Act of
1939, as amended, or any successor statute, as in effect at such time.

    "TRUSTEE" means the Person named as the "Trustee" in the first paragraph of
this Indenture until a successor Trustee shall have become such with respect to
one or more series of Securities pursuant to the applicable provisions of this
Indenture, and thereafter "Trustee" shall mean or include each Person who is
then a Trustee hereunder, and if at any time there is more than one such Person,
"Trustee" as used with respect to the Securities of any series shall mean the
Trustee with respect to Securities of that series.

    "UNITED STATES" means the United States of America, its Territories, its
possessions and other areas subject to its political jurisdiction.

SECTION 102.  COMPLIANCE CERTIFICATES AND OPINIONS.

    Except as otherwise expressly provided in this Indenture, upon any
application or request by the Company to the Trustee to take any action under
any provision of this Indenture, the Company shall, if requested by the Trustee,
furnish to the Trustee an Officer's Certificate stating that all conditions
precedent, if any, provided for in this Indenture relating to the proposed
action have been complied with and an Opinion of Counsel stating that in the
opinion of such counsel all such conditions precedent, if any, have been
complied with, except that in the case of any such application or request as to
which the furnishing of such documents is 


                                         -8-
<PAGE>

specifically required by any provision of this Indenture relating to such
particular application or request, no additional certificate or opinion need be
furnished.

    Every certificate or opinion with respect to compliance with a condition or
covenant provided for in this Indenture shall include:

         (a)  a statement that each Person signing such certificate or opinion
    has read such covenant or condition and the definitions herein relating
    thereto;

         (b)  a brief statement as to the nature and scope of the examination
    or investigation upon which the statements or opinions contained in such
    certificate or opinion are based;

         (c)  a statement that, in the opinion of each such Person, such Person
    has made such examination or investigation as is necessary to enable such
    Person to express an informed opinion as to whether or not such covenant or
    condition has been complied with; and

         (d)  a statement as to whether, in the opinion of each such Person,
    such condition or covenant has been complied with.

SECTION 103.  FORM OF DOCUMENTS DELIVERED TO TRUSTEE.

    In any case where several matters are required to be certified by, or
covered by an opinion of, any specified Person, it is not necessary that all
such matters be certified by, or covered by the opinion of, only one such
Person, or that they be so certified or covered by only one document, but one
such Person may certify or give an opinion with respect to some matters and one
or more other such Persons as to other matters, and any such Person may certify
or give an opinion as to such matters in one or several documents.

    Any certificate or opinion of an officer of the Company may be based,
insofar as it relates to legal matters, upon a certificate or opinion of, or
representations by, counsel, unless such officer knows, or in the exercise of
reasonable care should know, that the certificate or opinion or representations
with respect to the matters upon which such Officer's Certificate or opinion are
based are erroneous.  Any such certificate or Opinion of Counsel may be based,
insofar as it relates to factual matters, upon a certificate or opinion of, or
representations by, an officer or officers of the Company stating that the
information with respect to such factual matters is in the possession of the
Company, unless such counsel knows, or in the exercise of reasonable care should
know, that the certificate or opinion or representations with respect to such
matters are erroneous.


                                         -9-
<PAGE>

    Where any Person is required to make, give or execute two or more
applications, requests, consents, certificates, statements, opinions or other
instruments under this Indenture, they may, but need not, be consolidated and
form one instrument.

    Whenever, subsequent to the receipt by the Trustee of any Board 
Resolution, Officer's Certificate, Opinion of Counsel or other document or 
instrument, a clerical, typographical or other inadvertent or unintentional 
error or omission shall be discovered therein, a new document or instrument 
may be substituted therefor in corrected form with the same force and effect 
as if originally filed in the corrected form and, irrespective of the date or 
dates of the actual execution and/or delivery thereof, such substitute 
document or instrument shall be deemed to have been executed and/or delivered 
as of the date or dates required with respect to the document or instrument 
for which it is substituted. Anything in this Indenture to the contrary 
notwithstanding, if any such corrective document or instrument indicates that 
action has been taken by or at the request of the Company which could not 
have been taken had the original document or instrument not contained such 
error or omission, the action so taken shall not be invalidated or otherwise 
rendered ineffective but shall be and remain in full force and effect, except
to the extent that such action was a result of willful misconduct or bad 
faith.  Without limiting the generality of the foregoing, any Securities 
issued under the authority of such defective document or instrument shall 
nevertheless be the valid obligations of the Company entitled to the benefits 
of this Indenture equally and ratably with all other Outstanding Securities, 
except as aforesaid.

SECTION 104.  ACTS OF HOLDERS.

         (a)  Any request, demand, authorization, direction, notice, consent,
    election, waiver or other action provided by this Indenture to be made,
    given or taken by Holders may be embodied in and evidenced by one or more
    instruments of substantially similar tenor signed by such Holders in person
    or by an agent duly appointed in writing or, alternatively, may be embodied
    in and evidenced by the record of Holders voting in favor thereof, either
    in person or by proxies duly appointed in writing, at any meeting of
    Holders duly called and held in accordance with the provisions of Article
    Thirteen, or a combination of such instruments and any such record.  Except
    as herein otherwise expressly provided, such action shall become effective
    when such instrument or instruments or record or both are delivered to the
    Trustee and, where it is hereby expressly required, to the Company.  Such
    instrument or instruments and any such record (and the action embodied
    therein and evidenced thereby) are herein sometimes referred to as the
    "Act" of the Holders signing such instrument or instruments and so voting
    at any such meeting.  Proof of execution of any such instrument or of a
    writing appointing any such agent, or of the holding by any Person of a
    Security, shall 


                                         -10-
<PAGE>

    be sufficient for any purpose of this Indenture and (subject to Section
    901) conclusive in favor of the Trustee and the Company, if made in the
    manner provided in this Section.  The record of any meeting of Holders
    shall be proved in the manner provided in Section 1306.

         (b)  The fact and date of the execution by any Person of any such
    instrument or writing may be proved by the affidavit of a witness of such
    execution or by a certificate of a notary public or other officer
    authorized by law to take acknowledgments of deeds, certifying that the
    individual signing such instrument or writing acknowledged to him the
    execution thereof or may be proved in any other manner which the Trustee
    and the Company deem sufficient.  Where such execution is by a signer
    acting in a capacity other than his individual capacity, such certificate
    or affidavit shall also constitute sufficient proof of his authority.

         (c)  The principal amount (except as otherwise contemplated in clause
    (y) of the proviso to the definition of Outstanding) and serial numbers of
    Securities held by any Person, and the date of holding the same, shall be
    proved by the Security Register.

         (d)  Any request, demand, authorization, direction, notice, consent,
    election, waiver or other Act of a Holder shall bind every future Holder of
    the same Security and the Holder of every Security issued upon the
    registration of transfer thereof or in exchange therefor or in lieu thereof
    in respect of anything done, omitted or suffered to be done by the Trustee
    or the Company in reliance thereon, whether or not notation of such action
    is made upon such Security.

         (e)  Until such time as written instruments shall have been delivered
    to the Trustee with respect to the requisite percentage of principal amount
    of Securities for the action contemplated by such instruments, any such
    instrument executed and delivered by or on behalf of a Holder may be
    revoked with respect to any or all of such Securities by written notice by
    such Holder or any subsequent Holder, proven in the manner in which such
    instrument was proven.

         (f)  Securities of any series, or any Tranche thereof, authenticated
    and delivered after any Act of Holders may, and shall if required by the
    Trustee, bear a notation in form approved by the Trustee as to any action
    taken by such Act of Holders.  If the Company shall so determine, new
    Securities of any series, or any Tranche thereof, so modified as to
    conform, in the opinion of the Trustee and the Company, to such action may
    be prepared and executed by the Company and authenticated and delivered by
    the Trustee in exchange for Outstanding Securities of such series or
    Tranche.


                                         -11-
<PAGE>

         (g)  If the Company shall solicit from Holders any request, demand,
    authorization, direction, notice, consent, waiver or other Act, the Company
    may, at its option, by Company Order, fix in advance a record date for the
    determination of Holders entitled to give such request, demand,
    authorization, direction, notice, consent, waiver or other Act, but the
    Company shall have no obligation to do so.  If such a record date is fixed,
    such request, demand, authorization, direction, notice, consent, waiver or
    other Act may be given before or after such record date, but only the
    Holders of record at the close of business on the record date shall be
    deemed to be Holders for the purposes of determining whether Holders of the
    requisite proportion of the Outstanding Securities have authorized or
    agreed or consented to such request, demand, authorization, direction,
    notice, consent, waiver or other Act, and for that purpose the Outstanding
    Securities shall be computed as of the record date.

SECTION 105.  NOTICES, ETC. TO TRUSTEE AND COMPANY.

    Any request, demand, authorization, direction, notice, consent, election,
waiver or Act of Holders or other document provided or permitted by this
Indenture to be made upon, given or furnished to, or filed with, the Trustee by
any Holder or by the Company, or the Company by the Trustee or by any Holder,
shall be sufficient for every purpose hereunder (unless otherwise herein
expressly provided) if in writing and delivered personally to an officer or
other responsible employee of the addressee, or transmitted by facsimile
transmission, telex or other direct written electronic means to such telephone
number or other electronic communications address as the parties hereto shall
from time to time designate, or transmitted by registered mail, charges prepaid,
to the applicable address set opposite such party's name below or to such other
address as either party hereto may from time to time designate:

    If to the Trustee, to:

         First Trust National Association
         First Trust Center
         180 East Fifth Street
         Saint Paul, Minnesota  55101

         Attention:  Corporate Trust Officer
         Telephone:  (612) 244-0738
         Facsimile:  (612) 244-0712


                                         -12-
<PAGE>

    If to the Company, to:

         Otter Tail Power Company
         215 South Cascade Street
         P. O. Box 496
         Fergus Falls, Minnesota  56538-0496

         Attention:  Vice President, Finance
         Telephone:  (218) 739-8200
         Facsimile:  (218) 739-8895

    Any communication contemplated herein shall be deemed to have been made,
given, furnished and filed if personally delivered, on the date of delivery, if
transmitted by facsimile transmission, telex or other direct written electronic
means, on the date of transmission, and if transmitted by registered mail, on
the date of receipt.

SECTION 106.  NOTICE TO HOLDERS OF SECURITIES; WAIVER.

    Except as otherwise expressly provided herein, where this Indenture
provides for notice to Holders of any event, such notice shall be sufficiently
given, and shall be deemed given, to Holders if in writing and mailed,
first-class postage prepaid, to each Holder affected by such event, at the
address of such Holder as it appears in the Security Register, not later than
the latest date, and not earlier than the earliest date, prescribed for the
giving of such notice.

    In case by reason of the suspension of regular mail service or by reason of
any other cause it shall be impracticable to give such notice to Holders by
mail, then such notification as shall be made with the approval of the Trustee
shall constitute a sufficient notification for every purpose hereunder.  In any
case where notice to Holders is given by mail, neither the failure to mail such
notice, nor any defect in any notice so mailed, to any particular Holder shall
affect the sufficiency of such notice with respect to other Holders.

    Any notice required by this Indenture may be waived in writing by the
Person entitled to receive such notice, either before or after the event
otherwise to be specified therein, and such waiver shall be the equivalent of
such notice.  Waivers of notice by Holders shall be filed with the Trustee, but
such filing shall not be a condition precedent to the validity of any action
taken in reliance upon such waiver.


                                         -13-
<PAGE>

SECTION 107.  CONFLICT WITH TRUST INDENTURE ACT.

    If any provision of this Indenture limits, qualifies or conflicts with
another provision hereof which is required or deemed to be included in this
Indenture by, or is otherwise governed by, any of the provisions of the Trust
Indenture Act, such other provision shall control; and if any provision hereof
otherwise conflicts with the Trust Indenture Act, the Trust Indenture Act shall
control.

SECTION 108.  EFFECT OF HEADINGS AND TABLE OF CONTENTS.

    The Article and Section headings in this Indenture and the Table of
Contents are for convenience only and shall not affect the construction hereof.

SECTION 109.  SUCCESSORS AND ASSIGNS.

    All covenants and agreements in this Indenture by the Company and Trustee
shall bind their respective successors and assigns, whether so expressed or not.

SECTION 110.  SEPARABILITY CLAUSE.

    In case any provision in this Indenture or the Securities shall be held to
be invalid, illegal or unenforceable, the validity, legality and enforceability
of the remaining provisions shall not in any way be affected or impaired
thereby.

SECTION 111.  BENEFITS OF INDENTURE.

    Nothing in this Indenture or the Securities, express or implied, shall give
to any Person, other than the parties hereto, their successors hereunder and the
Holders, any benefit or any legal or equitable right, remedy or claim under this
Indenture.

SECTION 112.  GOVERNING LAW.

    This Indenture and the Securities shall be governed by and construed in
accordance with the laws of the State of New York, except to the extent that the
law of any other jurisdiction shall be mandatorily applicable.

SECTION 113.  LEGAL HOLIDAYS.

    In any case where any Interest Payment Date, Redemption Date or Stated
Maturity of any Security shall not be a Business Day at any Place of Payment,
then (notwithstanding any other provision of this Indenture or of the Securities
other than a provision in Securities of any series, or any Tranche thereof, or
in the Board Resolution or Officer's Certificate which establishes the terms of
the Securities of 


                                         -14-
<PAGE>

such series or Tranche, which specifically states that such provision shall
apply in lieu of this Section) payment of interest or principal and premium, if
any, need not be made at such Place of Payment on such date, but may be made on
the next succeeding Business Day at such Place of Payment, except that if such
Business Day is in the next succeeding calendar year, such payment shall be made
on the immediately preceding Business Day in each case with the same force and
effect as if made on the Interest Payment Date or Redemption Date, or at the
Stated Maturity, and, if such payment is made or duly provided for on such
Business Day, no interest shall accrue on the amount so payable for the period
from and after such Interest Payment Date, Redemption Date or Stated Maturity,
as the case may be, to such Business Day.

                                     ARTICLE TWO
                                           
                                    SECURITY FORMS
                                           
SECTION 201.  FORMS GENERALLY.

    The definitive Securities of each series shall be in substantially the form
or forms thereof established in the indenture supplemental hereto establishing
such series or in a Board Resolution establishing such series, or in an
Officer's Certificate pursuant to such supplemental indenture or Board
Resolution, in each case with such appropriate insertions, omissions,
substitutions and other variations as are required or permitted by this
Indenture, and may have such letters, numbers or other marks of identification
and such legends or endorsements placed thereon as may be required to comply
with the rules of any securities exchange or as may, consistently herewith, be
determined by the officers executing such Securities, as evidenced by their
execution of the Securities.  If the form or forms of Securities of any series
are established in a Board Resolution or in an Officer's Certificate pursuant to
a Board Resolution, such Board Resolution and Officer's Certificate, if any,
shall be delivered to the Trustee at or prior to the delivery of the Company
Order contemplated by Section 303 for the authentication and delivery of such
Securities.

    Unless otherwise specified as contemplated by Section 301, the Securities
of each series shall be issuable in registered form without coupons.  The
definitive Securities shall be produced in such manner as shall be determined by
the officers executing such Securities, as evidenced by their execution thereof.

SECTION 202.  FORM OF TRUSTEE'S CERTIFICATE OF AUTHENTICATION.

    The Trustee's certificate of authentication shall be in substantially the
form set forth below:


                                         -15-
<PAGE>

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

                                  First Trust National Association,
                                  Trustee


                                  By:  
                                     --------------------------------------
                                         Authorized Officer

                                    ARTICLE THREE
                                           
                                    THE SECURITIES
                                           
SECTION 301.  AMOUNT UNLIMITED; ISSUABLE IN SERIES.

    The aggregate principal amount of Securities which may be authenticated and
delivered under this Indenture is unlimited.

    The Securities may be issued in one or more series.  Prior to the
authentication and delivery of Securities of any series there shall be
established by specification in a supplemental indenture or in a Board
Resolution, or in an Officer's Certificate pursuant to a supplemental indenture
or a Board Resolution:

         (a)  the title of the Securities of such series (which shall
    distinguish the Securities of such series from Securities of all other
    series);

         (b)  any limit upon the aggregate principal amount of the Securities
    of such series which may be authenticated and delivered under this
    Indenture (except for Securities authenticated and delivered upon
    registration of transfer of, or in exchange for, or in lieu of, other
    Securities of such series pursuant to Section 304, 305, 306, 406 or 1206
    and, except for any Securities which, pursuant to Section 303, are deemed
    never to have been authenticated and delivered hereunder);

         (c)  the Person or Persons (without specific identification) to whom
    interest on Securities of such series, or any Tranche thereof, shall be
    payable on any Interest Payment Date, if other than the Persons in whose
    names such Securities (or one or more Predecessor Securities) are
    registered at the close of business on the Regular Record Date for such
    interest;

         (d)  the date or dates on which the principal of the Securities of
    such series, or any Tranche thereof, is payable or any formula or other
    method or other means by which such date or dates shall be determined, by
    reference to 


                                         -16-
<PAGE>

    an index or other fact or event ascertainable outside of this Indenture or
    otherwise (without regard to any provisions for redemption, prepayment,
    acceleration, purchase or extension);

         (e)  the rate or rates at which the Securities of such series, or any
    Tranche thereof, shall bear interest, if any (including the rate or rates
    at which overdue principal shall bear interest, if different from the rate
    or rates at which such Securities shall bear interest prior to Maturity,
    and, if applicable, the rate or rates at which overdue premium or interest
    shall bear interest, if any), or any formula or other method or other means
    by which such rate or rates shall be determined, by reference to an index
    or other fact or event ascertainable outside of this Indenture or
    otherwise; the date or dates from which such interest shall accrue; the
    Interest Payment Dates on which such interest shall be payable and the
    Regular Record Date, if any, for the interest payable on such Securities on
    any Interest Payment Date;

         (f)  the place or places at which or methods by which (1) the
    principal of and premium, if any, and interest, if any, on Securities of
    such series, or any Tranche thereof, shall be payable, (2) registration of
    transfer of Securities of such series, or any Tranche thereof, may be
    effected, (3) exchanges of Securities of such series, or any Tranche
    thereof, may be effected and (4) notices and demands to or upon the Company
    in respect of the Securities of such series, or any Tranche thereof, and
    this Indenture may be served; the Security Registrar and any Paying Agent
    or Agents for such series or Tranche; and if such is the case, that the
    principal of such Securities shall be payable without presentment or
    surrender thereof;

         (g)  the period or periods within which, or the date or dates on
    which, the price or prices at which and the terms and conditions upon which
    the Securities of such series, or any Tranche thereof, may be redeemed, in
    whole or in part, at the option of the Company and any restrictions on such
    redemptions, including but not limited to a restriction on a partial
    redemption by the Company of the Securities of any series, or any Tranche
    thereof, resulting in delisting of such Securities from any national
    exchange;

         (h)  the obligation or obligations, if any, of the Company to redeem
    or purchase the Securities of such series, or any Tranche thereof, pursuant
    to any sinking fund or other mandatory redemption provisions or at the
    option of a Holder thereof and the period or periods within which or the
    date or dates on which, the price or prices at which and the terms and
    conditions upon which such Securities shall be redeemed or purchased, in
    whole or in part, pursuant to such obligation, and applicable exceptions to
    the requirements of Section 404 in the case of mandatory redemption or
    redemption at the option of the Holder;


                                         -17-
<PAGE>

         (i)  the denominations in which Securities of such series, or any
    Tranche thereof, shall be issuable if other than denominations of $1,000
    and any integral multiple thereof;

         (j)  the currency or currencies, including composite currencies, in
    which payment of the principal of and premium, if any, and interest, if
    any, on the Securities of such series, or any Tranche thereof, shall be
    payable (if other than in Dollars);

         (k)  if the principal of or premium, if any, or interest, if any, on
    the Securities of such series, or any Tranche thereof, are to be payable,
    at the election of the Company or a Holder thereof, in a coin or currency
    other than that in which the Securities are stated to be payable, the
    period or periods within which, and the terms and conditions upon which,
    such election may be made;

         (l)  if the principal of or premium, if any, or interest, if any, on
    the Securities of such series, or any Tranche thereof, are to be payable,
    or are to be payable at the election of the Company or a Holder thereof, in
    securities or other property, the type and amount of such securities or
    other property, or the formulary or other method or other means by which
    such amount shall be determined, and the period or periods within which,
    and the terms and conditions upon which, any such election may be made;

         (m)  if the amount payable in respect of principal of or premium, if
    any, or interest, if any, on the Securities of such series, or any Tranche
    thereof, may be determined with reference to an index or other fact or
    event ascertainable outside of this Indenture, the manner in which such
    amounts shall be determined to the extent not established pursuant to
    clause (e) of this paragraph;

         (n)  if other than the principal amount thereof, the portion of the
    principal amount of Securities of such series, or any Tranche thereof,
    which shall be payable upon declaration of acceleration of the Maturity
    thereof pursuant to Section 802;

         (o)  any Events of Default, in addition to those specified in Section
    801, with respect to the Securities of such series, and any covenants of
    the Company for the benefit of the Holders of the Securities of such
    series, or any Tranche thereof, in addition to those set forth in Article
    Six;

         (p)  the terms, if any, pursuant to which the Securities of such
    series, or any Tranche thereof, may be converted into or exchanged for
    shares of capital stock or other securities of the Company or any other
    Person;


                                         -18-
<PAGE>

         (q)  the obligations or instruments, if any, which shall be considered
    to be Eligible Obligations in respect of the Securities of such series, or
    any Tranche thereof, denominated in a currency other than Dollars or in a
    composite currency, and any additional or alternative provisions for the
    reinstatement of the Company's indebtedness in respect of such Securities
    after the satisfaction and discharge thereof as provided in Section 701;

         (r)  if the Securities of such series, or any Tranche thereof, are to
    be issued in global form, (1) any limitations on the rights of the Holder
    or Holders of such Securities to transfer or exchange the same or to obtain
    the registration of transfer thereof, (2) any limitations on the rights of
    the Holder or Holders thereof to obtain certificates therefor in definitive
    form in lieu of temporary form and (3) any and all other matters incidental
    to such Securities;

         (s)  if the Securities of such series, or any Tranche thereof, are to
    be issuable as bearer securities, any and all matters incidental thereto
    which are not specifically addressed in a supplemental indenture as
    contemplated by clause (g) of Section 1201;

         (t)  to the extent not established pursuant to clause (r) of this
    paragraph, any limitations on the rights of the Holders of the Securities
    of such Series, or any Tranche thereof, to transfer or exchange such
    Securities or to obtain the registration of transfer thereof; and if a
    service charge will be made for the registration of transfer or exchange of
    Securities of such series, or any Tranche thereof, the amount or terms
    thereof;

         (u)  any exceptions to Section 113, or variation in the definition of
    Business Day, with respect to the Securities of such series, or any Tranche
    thereof; and

         (v)  any other terms of the Securities of such series, or any Tranche
    thereof, not inconsistent with the provisions of this Indenture.

    With respect to Securities of a series subject to a Periodic Offering, the
indenture supplemental hereto or the Board Resolution which establishes such
series, or the Officer's Certificate pursuant to such supplemental indenture or
Board Resolution, as the case may be, may provide general terms or parameters
for Securities of such series and provide either that the specific terms of
Securities of such series, or any Tranche thereof, shall be specified in a
Company Order or that such terms shall be determined by the Company or its
agents in accordance with procedures specified in a Company Order as
contemplated by clause (b) of Section 303.


                                         -19-
<PAGE>

SECTION 302.  DENOMINATIONS.

    Unless otherwise provided as contemplated by Section 301 with respect to
any series of Securities, or any Tranche thereof, the Securities of each series
shall be issuable in denominations of $1,000 and any integral multiple thereof.

SECTION 303.  EXECUTION, AUTHENTICATION, DELIVERY AND DATING.

    Unless otherwise provided as contemplated by Section 301 with respect to
any series of Securities, or any Tranche thereof, the Securities shall be
executed on behalf of the Company by an Authorized Officer and may have the
corporate seal of the Company affixed thereto or reproduced thereon and attested
by any other Authorized Officer.  The signature of any or all of these officers
on the Securities may be manual or facsimile.

    Securities bearing the manual or facsimile signatures of individuals who
were at the time of execution Authorized Officers of the Company shall bind the
Company, notwithstanding that such individuals or any of them have ceased to
hold such offices prior to the authentication and delivery of such Securities or
did not hold such offices at the date of such Securities.

    The Trustee shall authenticate and deliver Securities of a series, for
original issue, at one time or from time to time in accordance with the Company
Order referred to below, upon receipt by the Trustee of:

         (a)  the instrument or instruments establishing the form or forms and
    terms of such series, as provided in Sections 201 and 301;

         (b)  a Company Order requesting the authentication and delivery of
    such Securities and, to the extent that the terms of such Securities shall
    not have been established in an indenture supplemental hereto or in a Board
    Resolution, or in an Officer's Certificate pursuant to a supplemental
    indenture or Board Resolution, all as contemplated by Sections 201 and 301,
    either (1) establishing such terms or (2) in the case of Securities of a
    series subject to a Periodic Offering, specifying procedures, acceptable to
    the Trustee, by which such terms are to be established (which procedures
    may provide, to the extent acceptable to the Trustee, for authentication
    and delivery pursuant to oral or electronic instructions from the Company
    or any agent or agents thereof, which oral instructions are to be promptly
    confirmed electronically or in writing), in either case in accordance with
    the instrument or instruments delivered pursuant to clause (a) above;

         (c)  the Securities of such series, executed on behalf of the Company
    by an Authorized Officer;


                                         -20-
<PAGE>

         (d)  an Opinion of Counsel to the effect that:

              (1)  the form or forms of such Securities have been duly
         authorized by the Company and have been established in conformity with
         the provisions of this Indenture;

              (2)  the terms of such Securities have been duly authorized by
         the Company and have been established in conformity with the
         provisions of this Indenture; and

              (3)  such Securities, when authenticated and delivered by the
         Trustee and issued and delivered by the Company in the manner and
         subject to any conditions specified in such Opinion of Counsel, will
         have been duly issued under this Indenture and will constitute valid
         and legally binding obligations of the Company, entitled to the
         benefits provided by this Indenture, and enforceable in accordance
         with their terms, subject, as to enforcement, to laws relating to or
         affecting generally the enforcement of creditors' rights, including,
         without limitation, bankruptcy and insolvency laws and to general
         principles of equity (regardless of whether such enforceability is
         considered in a proceeding in equity or at law);

provided, however, that, with respect to Securities of a series subject to a
Periodic Offering, the Trustee shall be entitled to receive such Opinion of
Counsel only once at or prior to the time of the first authentication of such
Securities (provided that such Opinion of Counsel addresses the authentication
and delivery of all Securities of such series) and that in lieu of the opinions
described in clauses (2) and (3) above Counsel may opine that:

         (x)  when the terms of such Securities shall have been established
    pursuant to a Company Order or Orders or pursuant to such procedures
    (acceptable to the Trustee) as may be specified from time to time by a
    Company Order or Orders, all as contemplated by and in accordance with the
    instrument or instruments delivered pursuant to clause (a) above, such
    terms will have been duly authorized by the Company and will have been
    established in conformity with the provisions of this Indenture; and

         (y)  such Securities, when authenticated and delivered by the Trustee
    in accordance with this Indenture and the Company Order or Orders or
    specified procedures referred to in paragraph (x) above and issued and
    delivered by the Company in the manner and subject to any conditions
    specified in such Opinion of Counsel, will have been duly issued under this
    Indenture and will constitute valid and legally binding obligations of the
    Company, entitled to the benefits provided by the Indenture, and
    enforceable 


                                         -21-
<PAGE>

    in accordance with their terms, subject, as to enforcement, to laws
    relating to or affecting generally the enforcement of creditors' rights,
    including, without limitation, bankruptcy and insolvency laws and to
    general principles of equity (regardless of whether such enforceability is
    considered in a proceeding in equity or at law).

    With respect to Securities of a series subject to a Periodic Offering, the
Trustee may conclusively rely, as to the authorization by the Company of any of
such Securities, the form and terms thereof and the legality, validity, binding
effect and enforceability thereof, upon the Opinion of Counsel and other
documents delivered pursuant to Sections 201 and 301 and this Section, as
applicable, at or prior to the time of the first authentication of Securities of
such series unless and until such opinion or other documents have been
superseded or revoked or expire by their terms.  In connection with the
authentication and delivery of Securities of a series subject to a Periodic
Offering, the Trustee shall be entitled to assume that the Company's
instructions to authenticate and deliver such Securities do not violate any
rules, regulations or orders of any Governmental Authority having jurisdiction
over the Company.

    If the form or terms of the Securities of any series have been established
by or pursuant to a Board Resolution or an Officer's Certificate as permitted by
Sections 201 or 301, the Trustee shall not be required to authenticate such
Securities if the issuance of such Securities pursuant to this Indenture will
affect the Trustee's own rights, duties or immunities under the Securities and
this Indenture or otherwise in a manner which is not reasonably acceptable to
the Trustee.

    Unless otherwise specified as contemplated by Section 301 with respect to
any series of Securities, or any Tranche thereof, each Security shall be dated
the date of its authentication.

    Unless otherwise specified as contemplated by Section 301 with respect to
any series of Securities, or any Tranche thereof, no Security shall be entitled
to any benefit under this Indenture or be valid or obligatory for any purpose
unless there appears on such Security a certificate of authentication
substantially in the form provided for herein executed by the Trustee or its
agent by manual signature, and such certificate upon any Security shall be
conclusive evidence, and the only evidence, that such Security has been duly
authenticated and delivered hereunder and is entitled to the benefits of this
Indenture.  Notwithstanding the foregoing, if any Security shall have been
authenticated and delivered hereunder to the Company, or any Person acting on
its behalf, but shall never have been issued and sold by the Company, and the
Company shall deliver such Security to the Security Registrar for cancellation
as provided in Section 309 together with a written statement (which need not
comply with Section 102 and need not be accompanied by an Officer's Certificate
and an Opinion of Counsel) stating that such Security has 


                                         -22-
<PAGE>

never been issued and sold by the Company, for all purposes of this Indenture
such Security shall be deemed never to have been authenticated and delivered
hereunder and shall never be entitled to the benefits hereof.

SECTION 304.  TEMPORARY SECURITIES.

    Pending the preparation of definitive Securities of any series, or any
Tranche thereof, the Company may execute, and upon Company Order the Trustee
shall authenticate and deliver, temporary Securities which are printed,
lithographed, typewritten, mimeographed or otherwise produced, in any authorized
denomination, substantially of the tenor of the definitive Securities in lieu of
which they are issued, with such appropriate insertions, omissions,
substitutions and other variations as the officers executing such Securities may
determine, as evidenced by their execution of such Securities; provided,
however, that temporary Securities need not recite specific redemption, sinking
fund, conversion or exchange provisions.

    Unless otherwise specified as contemplated by Section 301 with respect to
the Securities of any series, or any Tranche thereof, after the preparation of
definitive Securities of such series or Tranche, the temporary Securities of
such series or Tranche shall be exchangeable, without charge to the Holder
thereof, for definitive Securities of such series or Tranche upon surrender of
such temporary Securities at the office or agency of the Company maintained
pursuant to Section 602 in a Place of Payment for such Securities.  Upon such
surrender of temporary Securities, the Company shall, except as aforesaid,
execute and the Trustee shall authenticate and deliver in exchange therefor
definitive Securities of the same series and Tranche, of authorized
denominations and of like tenor and aggregate principal amount.

    Until exchanged in full as hereinabove provided, temporary Securities shall
in all respects be entitled to the same benefits under this Indenture as
definitive Securities of the same series and Tranche and of like tenor
authenticated and delivered hereunder.

SECTION 305.  REGISTRATION, REGISTRATION OF TRANSFER AND EXCHANGE.

    The Company shall cause to be kept in each office designated pursuant to
Section 602, with respect to the Securities of each series or any Tranche
thereof, a register (all registers kept in accordance with this Section being
collectively referred to as the "Security Register") in which, subject to such
reasonable regulations as it may prescribe, the Company shall provide for the
registration of Securities of such series or Tranche and the registration of
transfer thereof.  The Company shall designate one Person to maintain the
Security Register for the Securities of each series on a consolidated basis, and
such Person is referred to herein, with respect to such series, as the "Security
Registrar." Anything herein to the contrary 


                                         -23-
<PAGE>

notwithstanding, the Company may designate one or more of its offices as an
office in which a register with respect to the Securities of one or more series,
or any Tranche or Tranches thereof, shall be maintained, and the Company may
designate itself the Security Registrar with respect to one or more of such
series.  The Security Register shall be open for inspection by the Trustee and
the Company at all reasonable times.

    Except as otherwise specified as contemplated by Section 301 with respect
to the Securities of any series, or any Tranche thereof, upon surrender for
registration of transfer of any Security of such series or Tranche at the office
or agency of the Company maintained pursuant to Section 602 in a Place of
Payment for such series or Tranche, the Company shall execute, and the Trustee
shall authenticate and deliver, in the name of the designated transferee or
transferees, one or more new Securities of the same series and Tranche, of
authorized denominations and of like tenor and aggregate principal amount.

    Except as otherwise specified as contemplated by Section 301 with respect
to the Securities of any series, or any Tranche thereof, any Security of such
series or Tranche may be exchanged at the option of the Holder, for one or more
new Securities of the same series and Tranche, of authorized denominations and
of like tenor and aggregate principal amount, upon surrender of the Securities
to be exchanged at any such office or agency.  Whenever any Securities are so
surrendered for exchange, the Company shall execute, and the Trustee shall
authenticate and deliver, the Securities which the Holder making the exchange is
entitled to receive.

    All Securities delivered upon any registration of transfer or exchange of
Securities shall be valid obligations of the Company, evidencing the same debt,
and entitled to the same benefits under this Indenture, as the Securities
surrendered upon such registration of transfer or exchange.

    Every Security presented or surrendered for registration of transfer or for
exchange shall (if so required by the Company, the Trustee or the Security
Registrar) be duly endorsed or shall be accompanied by a written instrument of
transfer in form satisfactory to the Company, the Trustee or the Security
Registrar, as the case may be, duly executed by the Holder thereof or his
attorney duly authorized in writing.

    Unless otherwise specified as contemplated by Section 301 with respect to
Securities of any series, or any Tranche thereof, no service charge shall be
made for any registration of transfer or exchange of Securities, but the Company
may require payment of a sum sufficient to cover any tax or other governmental
charge that may be imposed in connection with any registration of transfer or
exchange of Securities, other than exchanges pursuant to Section 304, 406 or
1206 not involving any transfer.


                                         -24-
<PAGE>

    The Company shall not be required to execute or to provide for the
registration of transfer of or the exchange of (a) Securities of any series, or
any Tranche thereof, during a period of 15 days immediately preceding the date
notice is to be given identifying the serial numbers of the Securities of such
series or Tranche called for redemption or (b) any Security so selected for
redemption in whole or in part, except the unredeemed portion of any Security
being redeemed in part.

SECTION 306.  MUTILATED, DESTROYED, LOST AND STOLEN SECURITIES.

    If any mutilated Security is surrendered to the Trustee, the Company shall
execute and the Trustee shall authenticate and deliver in exchange therefor a
new Security of the same series and Tranche, and of like tenor and principal
amount and bearing a number not contemporaneously outstanding.

    If there shall be delivered to the Company and the Trustee (a) evidence to
their satisfaction of the ownership of and the destruction, loss or theft of any
Security and (b) such security or indemnity as may be reasonably required by
them to save each of them and any agent of either of them harmless, then, in the
absence of notice to the Company or the Trustee that such Security is held by a
Person purporting to be the owner of such Security, the Company shall execute
and the Trustee shall authenticate and deliver, in lieu of any such destroyed,
lost or stolen Security, a new Security of the same series and Tranche, and of
like tenor and principal amount and bearing a number not contemporaneously
outstanding.

    Notwithstanding the foregoing, in case any such mutilated, destroyed, lost
or stolen Security has become or is about to become due and payable, the Company
in its discretion may, instead of issuing a new Security, pay such Security.

    Upon the issuance of any new Security under this Section, the Company may
require the payment of a sum sufficient to cover any tax or other governmental
charge that may be imposed in relation thereto and any other reasonable expenses
(including the fees and expenses of the Trustee) connected therewith.

    Every new Security of any series issued pursuant to this Section in lieu of
any destroyed, lost or stolen Security shall constitute an original additional
contractual obligation of the Company, whether or not the destroyed, lost or
stolen Security shall be at any time enforceable by anyone other than the Holder
of such new Security, and any such new Security shall be entitled to all the
benefits of this Indenture equally and proportionately with any and all other
Securities of such series duly issued hereunder.

    The provisions of this Section are exclusive and shall preclude (to the
extent lawful) all other rights and remedies with respect to the replacement or
payment of mutilated, destroyed, lost or stolen Securities.


                                         -25-
<PAGE>

SECTION 307.  PAYMENT OF INTEREST; INTEREST RIGHTS PRESERVED.

    Unless otherwise specified as contemplated by Section 301 with respect to
the Securities of any series, or any Tranche thereof, interest on any Security
which is payable, and is punctually paid or duly provided for, on any Interest
Payment Date shall be paid to the Person in whose name that Security (or one or
more Predecessor Securities) is registered at the close of business on the
Regular Record Date for such interest.

    Any interest on any Security of any series which is payable, but is not
punctually paid or duly provided for, on any Interest Payment Date (herein
called "Defaulted Interest") shall forthwith cease to be payable to the Holder
on the related Regular Record Date by virtue of having been such Holder, and
such Defaulted Interest may be paid by the Company, at its election in each
case, as provided in clause (a) or (b) below:

         (a)  The Company may elect to make payment of any Defaulted Interest
    to the Persons in whose names the Securities of such series (or their
    respective Predecessor Securities) are registered at the close of business
    on a date (herein called a "Special Record Date") for the payment of such
    Defaulted Interest, which shall be fixed in the following manner.  The
    Company shall notify the Trustee in writing of the amount of Defaulted
    Interest proposed to be paid on each Security of such series and the date
    of the proposed payment, and at the same time the Company shall deposit
    with the Trustee an amount of money equal to the aggregate amount proposed
    to be paid in respect of such Defaulted Interest or shall make arrangements
    satisfactory to the Trustee for such deposit prior to the date of the
    proposed payment, such money when deposited to be held in trust for the
    benefit of the Persons entitled to such Defaulted Interest as in this
    clause provided.  Thereupon the Trustee shall fix a Special Record Date for
    the payment of such Defaulted Interest which shall be not more than 15 days
    and not less than 10 days prior to the date of the proposed payment and not
    less than 10 days after the receipt by the Trustee of the notice of the
    proposed payment.  The Trustee shall promptly notify the Company of such
    Special Record Date and, in the name and at the expense of the Company,
    shall promptly cause notice of the proposed payment of such Defaulted
    Interest and the Special Record Date therefor to be mailed, first-class
    postage prepaid, to each Holder of Securities of such series at the address
    of such Holder as it appears in the Security Register, not less than 10
    days prior to such Special Record Date.  Notice of the proposed payment of
    such Defaulted Interest and the Special Record Date therefor having been so
    mailed, such Defaulted Interest shall be paid to the Persons in whose names
    the Securities of such series (or their respective Predecessor Securities)
    are registered at the close of business on such Special Record Date.


                                         -26-
<PAGE>

         (b)  The Company may make payment of any Defaulted Interest on the
    Securities of any series in any other lawful manner not inconsistent with
    the requirements of any securities exchange on which such Securities may be
    listed, and upon such notice as may be required by such exchange, if, after
    notice given by the Company to the Trustee of the proposed payment pursuant
    to this clause, such manner of payment shall be deemed practicable by the
    Trustee.

    Subject to the foregoing provisions of this Section and Section 305, each
Security delivered under this Indenture upon registration of transfer of or in
exchange for or in lieu of any other Security shall carry the rights to interest
accrued and unpaid, and to accrue, which were carried by such other Security.

SECTION 308.  PERSONS DEEMED OWNERS.

    The Company, the Trustee and any agent of the Company or the Trustee may
treat the Person in whose name such Security is registered as the absolute owner
of such Security for the purpose of receiving payment of principal of and
premium, if any, and (subject to Sections 305 and 307) interest, if any, on such
Security and for all other purposes whatsoever, whether or not such Security be
overdue, and neither the Company, the Trustee nor any agent of the Company or
the Trustee shall be affected by notice to the contrary.

SECTION 309.  CANCELLATION BY SECURITY REGISTRAR.

    All Securities surrendered for payment, redemption, registration of
transfer or exchange shall, if surrendered to any Person other than the Security
Registrar, be delivered to the Security Registrar and, if not theretofore
canceled, shall be promptly canceled by the Security Registrar.  The Company may
at any time deliver to the Security Registrar for cancellation any Securities
previously authenticated and delivered hereunder which the Company may have
acquired in any manner whatsoever or which the Company shall not have issued and
sold, and all Securities so delivered shall be promptly canceled by the Security
Registrar.  No Securities shall be authenticated in lieu of or in exchange for
any Securities canceled as provided in this Section, except as expressly
permitted by this Indenture.  All canceled Securities held by the Security
Registrar shall be disposed of in accordance with a Company Order delivered to
the Security Registrar and the Trustee, and the Security Registrar shall
promptly deliver a certificate of disposition to the Trustee and the Company
unless, by a Company Order, similarly delivered, the Company shall direct that
canceled Securities be returned to it.  The Security Registrar shall promptly
deliver evidence of any cancellation of a Security in accordance with this
Section 309 to the Trustee and the Company.


                                         -27-
<PAGE>

SECTION 310.  COMPUTATION OF INTEREST.

    Except as otherwise specified as contemplated by Section 301 for Securities
of any series, or any Tranche thereof, interest on the Securities of each series
shall be computed on the basis of a 360-day year consisting of twelve 30-day
months and on the basis of the actual number of days elapsed within any month in
relation to the deemed 30 days of such month.

SECTION 311.  PAYMENT TO BE IN PROPER CURRENCY.

    In the case of the Securities of any series, or any Tranche thereof,
denominated in any currency other than Dollars or in a composite currency (the
"Required Currency"), except as otherwise specified with respect to such
Securities as contemplated by Section 301, the obligation of the Company to make
any payment of the principal thereof, or the premium, if any, or interest, if
any, thereon, shall not be discharged or satisfied by any tender by the Company,
or recovery by the Trustee, in any currency other than the Required Currency,
except to the extent that such tender or recovery shall result in the Trustee
timely holding the full amount of the Required Currency then due and payable. 
If any such tender or recovery is in a currency other than the Required
Currency, the Trustee may take such actions as it considers appropriate to
exchange such currency for the Required Currency.  The costs and risks of any
such exchange, including without limitation the risks of delay and exchange rate
fluctuation, shall be borne by the Company, the Company shall remain fully
liable for any shortfall or delinquency in the full amount of Required Currency
then due and payable, and in no circumstances shall the Trustee be liable
therefor except in the case of its negligence or willful misconduct.

                                     ARTICLE FOUR
                                           
                               REDEMPTION OF SECURITIES
                                           
SECTION 401.  APPLICABILITY OF ARTICLE.

    Securities of any series, or any Tranche thereof, which are redeemable
before their Stated Maturity shall be redeemable in accordance with their terms
and (except as otherwise specified as contemplated by Section 301 for Securities
of such series or Tranche) in accordance with this Article.

SECTION 402.  ELECTION TO REDEEM; NOTICE TO TRUSTEE.

    The election of the Company to redeem any Securities shall be evidenced by
a Board Resolution or an Officer's Certificate.  The Company shall, at least 45
days prior to the Redemption Date fixed by the Company (unless a shorter notice
shall be satisfactory to the Trustee), notify the Trustee in writing of such
Redemption Date 


                                         -28-
<PAGE>

and of the principal amount of such Securities to be redeemed.  In the case of
any redemption of Securities (a) prior to the expiration of any restriction on
such redemption provided in the terms of such Securities or elsewhere in this
Indenture or (b) pursuant to an election of the Company which is subject to a
condition specified in the terms of such Securities, the Company shall furnish
the Trustee with an Officer's Certificate evidencing compliance with such
restriction or condition.

SECTION 403.  SELECTION OF SECURITIES TO BE REDEEMED.

    If less than all the Securities of any series, or any Tranche thereof, are
to be redeemed, the particular Securities to be redeemed shall be selected by
the Security Registrar from the Outstanding Securities of such series or Tranche
not previously called for redemption, by such method as shall be provided for
any particular series or Tranche, or, in the absence of any such provision, by
such method of random selection as the Security Registrar shall deem fair and
appropriate and which may, in any case, provide for the selection for redemption
of portions (equal to the minimum authorized denomination for Securities of such
series or Tranche or any integral multiple thereof) of the principal amount of
Securities of such series or Tranche of a denomination larger than the minimum
authorized denomination for Securities of such series or Tranche; provided,
however, that if, as indicated in an Officer's Certificate, the Company shall
have offered to purchase all or any principal amount of the Securities then
Outstanding of any series, or any Tranche thereof, and less than all of such
Securities as to which such offer was made shall have been tendered to the
Company for such purchase, the Security Registrar, if so directed by Company
Order, shall select for redemption all or any principal amount of such
Securities which have not been so tendered.

    The Security Registrar shall promptly notify the Company and the Trustee in
writing of the Securities selected for redemption and, in the case of any
Securities selected to be redeemed in part, the principal amount thereof to be
redeemed.

    For all purposes of this Indenture, unless the context otherwise requires,
all provisions relating to the redemption of Securities shall relate, in the
case of any Securities redeemed or to be redeemed only in part, to the portion
of the principal amount of such Securities which has been or is to be redeemed.

SECTION 404.  NOTICE OF REDEMPTION.

    Notice of redemption shall be given in the manner provided in Section 106
to the Holders of the Securities to be redeemed not less than 30 nor more than
60 days prior to the Redemption Date.

    All notices of redemption shall state:


                                         -29-
<PAGE>

         (a)  the Redemption Date,

         (b)  the Redemption Price,

         (c)  if less than all the Securities of any series or Tranche are to
    be redeemed, the identification of the particular Securities to be redeemed
    and the portion of the principal amount of any Security to be redeemed in
    part,

         (d)  that on the Redemption Date the Redemption Price, together with
    accrued interest, if any, to the Redemption Date, will become due and
    payable upon each such Security to be redeemed and, if applicable, that
    interest thereon will cease to accrue on and after said date,

         (e)  the place or places where such Securities are to be surrendered
    for payment of the Redemption Price and accrued interest, if any, unless it
    shall have been specified as contemplated by Section 301 with respect to
    such Securities that such surrender shall not be required,

         (f)  that the redemption is for a sinking or other fund, if such is
    the case, and

         (g)  such other matters as the Company shall deem desirable or
    appropriate.

    Unless otherwise specified with respect to any Securities in accordance
with Section 301, with respect to any notice of redemption of Securities at the
election of the Company, unless, upon the giving of such notice, such Securities
shall be deemed to have been paid in accordance with Section 701, such notice
may state that such redemption shall be conditional upon the receipt by the
Paying Agent or Agents for such Securities, on or prior to the date fixed for
such redemption, of money sufficient to pay the principal of and premium, if
any, and interest, if any, on such Securities and that if such money shall not
have been so received such notice shall be of no force or effect and the Company
shall not be required to redeem such Securities.  In the event that such notice
of redemption contains such a condition and such money is not so received, the
redemption shall not be made and within a reasonable time thereafter notice
shall be given, in the manner in which the notice of redemption was given, that
such money was not so received and such redemption was not required to be made,
and the Paying Agent or Agents for the Securities otherwise to have been
redeemed shall promptly return to the Holders thereof any of such Securities
which had been surrendered for payment upon such redemption.

    Notice of redemption of Securities to be redeemed at the election of the
Company, and any notice of non-satisfaction of a condition for redemption as 


                                         -30-
<PAGE>

aforesaid, shall be given by the Company or, at the Company's request, by the
Security Registrar in the name and at the expense of the Company.  Notice of
mandatory redemption of Securities shall be given by the Security Registrar in
the name and at the expense of the Company.

SECTION 405.  SECURITIES PAYABLE ON REDEMPTION DATE.

    Notice of redemption having been given as aforesaid, and the conditions, if
any, set forth in such notice having been satisfied, the Securities or portions
thereof so to be redeemed shall, on the Redemption Date, become due and payable
at the Redemption Price therein specified, and from and after such date (unless,
in the case of an unconditional notice of redemption, the Company shall default
in the payment of the Redemption Price and accrued interest, if any) such
Securities or portions thereof, if interest-bearing, shall cease to bear
interest.  Upon surrender of any such Security for redemption in accordance with
such notice, such Security or portion thereof shall be paid by the Company at
the Redemption Price, together with accrued interest, if any, to the Redemption
Date; provided, however, that no such surrender shall be a condition to such
payment if so specified as contemplated by Section 301 with respect to such
Security; and provided, further, that except as otherwise specified as
contemplated by Section 301 with respect to such Security, any installment of
interest on any Security the Stated Maturity of which installment is on or prior
to the Redemption Date shall be payable to the Holder of such Security, or one
or more Predecessor Securities, registered as such at the close of business on
the related Regular Record Date according to the terms of such Security and
subject to the provisions of Section 307.

SECTION 406.  SECURITIES REDEEMED IN PART.

    Upon the surrender of any Security which is to be redeemed only in part at
a Place of Payment therefor (with, if the Company or the Trustee so requires,
due endorsement by, or a written instrument of transfer in form satisfactory to
the Company and the Trustee duly executed by, the Holder thereof or his attorney
duly authorized in writing), the Company shall execute, and the Trustee shall
authenticate and deliver to the Holder of such Security, without service charge,
a new Security or Securities of the same series and Tranche, of any authorized
denomination requested by such Holder and of like tenor and in aggregate
principal amount equal to and in exchange for the unredeemed portion of the
principal of the Security so surrendered.


                                         -31-
<PAGE>

                                     ARTICLE FIVE
                                           
                                    SINKING FUNDS
                                           
SECTION 501.  APPLICABILITY OF ARTICLE.

    The provisions of this Article shall be applicable to any sinking fund for
the retirement of the Securities of any series, or any Tranche thereof, except
as otherwise specified as contemplated by Section 301 for Securities of such
series or Tranche.

    The minimum amount of any sinking fund payment provided for by the terms of
Securities of any series, or any Tranche thereof, is herein referred to as a
"mandatory sinking fund payment", and any payment in excess of such minimum
amount provided for by the terms of Securities of any series, or any Tranche
thereof, is herein referred to as an "optional sinking fund payment".  If
provided for by the terms of Securities of any series, or any Tranche thereof,
the cash amount of any sinking fund payment may be subject to reduction as
provided in Section 502.  Each sinking fund payment shall be applied to the
redemption of Securities of the series or Tranche in respect of which it was
made as provided for by the terms of such Securities.

SECTION 502.  SATISFACTION OF SINKING FUND PAYMENTS WITH SECURITIES.

    The Company (a) may deliver to the Trustee Outstanding Securities (other
than any previously called for redemption) of a series or Tranche in respect of
which a mandatory sinking fund payment is to be made and (b) may apply as a
credit Securities of such series or Tranche which have been (1) redeemed either
at the election of the Company pursuant to the terms of such Securities or
through the application of permitted optional sinking fund payments pursuant to
the terms of such Securities or (2) repurchased by the Company in the open
market, by tender offer or otherwise, in each case in satisfaction of all or any
part of such mandatory sinking fund payment; provided, however, that no
Securities shall be applied in satisfaction of a mandatory sinking fund payment
if such Securities shall have been previously so applied.  Securities so applied
shall be received and credited for such purpose by the Trustee at the Redemption
Price specified in such Securities for redemption through operation of the
sinking fund and the amount of such mandatory sinking fund payment shall be
reduced accordingly.

SECTION 503.  REDEMPTION OF SECURITIES FOR SINKING FUND.

    Not less than 45 days prior to each sinking fund payment date for the
Securities of any series, or any Tranche thereof, the Company shall deliver to
the Trustee an Officer's Certificate specifying:


                                         -32-
<PAGE>

         (a)  the amount of the next succeeding mandatory sinking fund payment
    for such series or Tranche;

         (b)  the amount, if any, of the optional sinking fund payment to be
    made together with such mandatory sinking fund payment;

         (c)  the aggregate sinking fund payment;

         (d)  the portion, if any, of such aggregate sinking fund payment which
    is to be satisfied by the payment of cash;

         (e)  the portion, if any, of such aggregate sinking fund payment which
    is to be satisfied by delivering and crediting Securities of such series or
    Tranche pursuant to Section 502 and stating the basis for such credit and
    that such Securities have not previously been so credited, and the Company
    shall also deliver to the Trustee any Securities to be so delivered.

    If the Company shall not deliver such Officer's Certificate, the next
succeeding sinking fund payment for such series or Tranche shall be made
entirely in cash in the amount of the mandatory sinking fund payment.  Not less
than 40 days before each such sinking fund payment date the Trustee shall select
the Securities to be redeemed upon such sinking fund payment date in the manner
specified in Section 403 and cause notice of the redemption thereof to be given
in the name of and at the expense of the Company in the manner provided in
Section 404.  Such notice having been duly given, the redemption of such
Securities shall be made upon the terms and in the manner stated in Sections 405
and 406.

                                     ARTICLE SIX
                                           
                                      COVENANTS
                                           
SECTION 601.  PAYMENT OF PRINCIPAL, PREMIUM AND INTEREST.

    The Company shall pay the principal of and premium, if any, and interest,
if any, on the Securities of each series in accordance with the terms of such
Securities and this Indenture.

SECTION 602.  MAINTENANCE OF OFFICE OR AGENCY.

    The Company shall maintain in each Place of Payment for the Securities of
each series, or any Tranche thereof, an office or agency where payment of such
Securities shall be made, where the registration of transfer or exchange of such
Securities may be effected and where notices and demands to or upon the Company
in respect of such Securities and this Indenture may be served.  The Company
shall 


                                         -33-
<PAGE>

give prompt written notice to the Trustee of the location, and any change in the
location, of each such office or agency and prompt notice to the Holders of any
such change in the manner specified in Section 106.  If at any time the Company
shall fail to maintain any such required office or agency in respect of
Securities of any series, or any Tranche thereof, or shall fail to furnish the
Trustee with the address thereof, payment of such Securities shall be made,
registration of transfer or exchange thereof may be effected and notices and
demands in respect thereof may be served at the Corporate Trust Office of the
Trustee, and the Company hereby appoints the Trustee as its agent for all such
purposes in any such event.

    The Company may also from time to time designate one or more other offices
or agencies with respect to the Securities of one or more series, or any Tranche
thereof, for any or all of the foregoing purposes and may from time to time
rescind such designations; provided, however, that, unless otherwise specified
as contemplated by Section 301 with respect to the Securities of such series or
Tranche, no such designation or rescission shall in any manner relieve the
Company of its obligation to maintain an office or agency for such purposes in
each Place of Payment for such Securities in accordance with the requirements
set forth above.  The Company shall give prompt written notice to the Trustee,
and prompt notice to the Holders in the manner specified in Section 106, of any
such designation or rescission and of any change in the location of any such
other office or agency.

    Anything herein to the contrary notwithstanding, any office or agency
required by this Section may be maintained at an office of the Company, in which
event the Company shall perform all functions to be performed at such office or
agency.

SECTION 603.  MONEY FOR SECURITIES PAYMENTS TO BE HELD IN TRUST.

    If the Company shall at any time act as its own Paying Agent with respect
to the Securities of any series, or any Tranche thereof, it shall, on or before
each due date of the principal of and premium, if any, and interest, if any, on
any of such Securities, segregate and hold in trust for the benefit of the
Persons entitled thereto a sum sufficient to pay the principal and premium or
interest so becoming due until such sums shall be paid to such Persons or
otherwise disposed of as herein provided.  The Company shall promptly notify the
Trustee of any failure by the Company (or any other obligor on such Securities)
to make any payment of principal of or premium, if any, or interest, if any, on
such Securities.

    Whenever the Company shall have one or more Paying Agents for the
Securities of any series, or any Tranche thereof, it shall, on or before each
due date of the principal of and premium, if any, and interest, if any, on such
Securities, deposit with such Paying Agents sums sufficient (without
duplication) to pay the principal and premium or interest so becoming due, such
sums to be held in trust for the 


                                         -34-
<PAGE>

benefit of the Persons entitled to such principal, premium or interest, and
(unless such Paying Agent is the Trustee) the Company shall promptly notify the
Trustee of any failure by it so to act.

    The Company shall cause each Paying Agent for the Securities of any series,
or any Tranche thereof, other than the Company or the Trustee, to execute and
deliver to the Trustee an instrument in which such Paying Agent shall agree with
the Trustee, subject to the provisions of this Section, that such Paying Agent
shall:

         (a)  hold all sums held by it for the payment of the principal of and
    premium, if any, or interest, if any, on such Securities in trust for the
    benefit of the Persons entitled thereto until such sums shall be paid to
    such Persons or otherwise disposed of as herein provided;

         (b)  give the Trustee notice of any failure by the Company (or any
    other obligor upon such Securities) to make any payment of principal of or
    premium, if any, or interest, if any, on such Securities; and

         (c)  at any time during the continuance of any such failure, upon the
    written request of the Trustee, forthwith pay to the Trustee all sums so
    held in trust by such Paying Agent and furnish to the Trustee such
    information as it possesses regarding the names and addresses of the
    Persons entitled to such sums.

    The Company may at any time pay, or by Company Order direct any Paying
Agent to pay, to the Trustee all sums held in trust by the Company or such
Paying Agent, such sums to be held by the Trustee upon the same trusts as those
upon which such sums were held by the Company or such Paying Agent and, if so
stated in a Company Order delivered to the Trustee, in accordance with the
provisions of Article Seven; and, upon such payment by any Paying Agent to the
Trustee, such Paying Agent shall be released from all further liability with
respect to such money.

    Any money deposited with the Trustee or any Paying Agent, or then held by
the Company, in trust for the payment of the principal of and premium, if any,
or interest, if any, on any Security and remaining unclaimed for two years after
such principal and premium, if any, or interest, if any, has become due and
payable shall be paid to the Company on Company Request, or, if then held by the
Company, shall be discharged from such trust; and, upon such payment or
discharge, the Holder of such Security shall, as an unsecured general creditor
and not as a Holder of an Outstanding Security, look only to the Company for
payment of the amount so due and payable and remaining unpaid, and all liability
of the Trustee or such Paying Agent with respect to such trust money, and all
liability of the Company as trustee thereof, shall thereupon cease; provided,
however, that the Trustee or such Paying Agent, before being required to make
any such payment to the Company, may at the 


                                         -35-
<PAGE>

expense of the Company cause to be mailed, on one occasion only, notice to such
Holder that such money remains unclaimed and that, after a date specified
therein, which shall not be less than 30 days from the date of such mailing, any
unclaimed balance of such money then remaining will be paid to the Company.

SECTION 604.  CORPORATE EXISTENCE.

    Subject to the rights of the Company under Article Eleven, the Company
shall do or cause to be done all things necessary to preserve and keep in full
force and effect its corporate existence.

SECTION 605.  MAINTENANCE OF PROPERTIES.

    The Company shall cause (or, with respect to property owned in common with
others, make reasonable effort to cause) all its properties used or useful in
the conduct of its business to be maintained and kept in good condition, repair
and working order and shall cause (or, with respect to property owned in common
with others, make reasonable effort to cause) to be made all necessary repairs,
renewals, replacements, betterments and improvements thereof, all as, in the
judgment of the Company, may be necessary so that the business carried on in
connection therewith may be properly conducted; provided, however, that nothing
in this Section shall prevent the Company from discontinuing, or causing the
discontinuance of, the operation and maintenance of any of its properties if
such discontinuance is, in the judgment of the Company, desirable in the conduct
of its business.

SECTION 606.  ANNUAL OFFICER'S CERTIFICATE AS TO COMPLIANCE.

    Not later than October 1 in each year, commencing October 1, 1998, the
Company shall deliver to the Trustee an Officer's Certificate which need not
comply with Section 102, executed by the principal executive officer, the
principal financial officer or the principal accounting officer of the Company,
as to such officer's knowledge of the Company's compliance with all conditions
and covenants under this Indenture, such compliance to be determined without
regard to any period of grace or requirement of notice under this Indenture.

SECTION 607.  WAIVER OF CERTAIN COVENANTS.

    The Company may omit in any particular instance to comply with any term,
provision or condition set forth in (a) Section 602 or any additional covenant
or restriction specified with respect to the Securities of any series, or any
Tranche thereof, as contemplated by Section 301 if before the time for such
compliance the Holders of at least a majority in aggregate principal amount of
the Outstanding Securities of all series and Tranches with respect to which
compliance with Section 602 or such additional covenant or restriction is to be
omitted, considered as one 


                                         -36-
<PAGE>

class, shall, by Act of such Holders, either waive such compliance in such
instance or generally waive compliance with such term, provision or condition
and (b) Section 604, 605 or Article Eleven if before the time for such
compliance the Holders of at least a majority in principal amount of Securities
Outstanding under this Indenture shall, by Act of such Holders, either waive
such compliance in such instance or generally waive compliance with such term,
provision or condition; but, in the case of (a) or (b), no such waiver shall
extend to or affect such term, provision or condition except to the extent so
expressly waived, and, until such waiver shall become effective, the obligations
of the Company and the duties of the Trustee in respect of any such term,
provision or condition shall remain in full force and effect.

                                    ARTICLE SEVEN
                                           
                              SATISFACTION AND DISCHARGE
                                           
SECTION 701.  SATISFACTION AND DISCHARGE OF SECURITIES.

    Any Security or Securities, or any portion of the principal amount thereof,
shall be deemed to have been paid for all purposes of this Indenture, and the
entire indebtedness of the Company in respect thereof shall be deemed to have
been satisfied and discharged, if there shall have been irrevocably deposited
with the Trustee or any Paying Agent (other than the Company), in trust:

         (a)  money in an amount which shall be sufficient, or

         (b)  in the case of a deposit made prior to the Maturity of such
    Securities or portions thereof, Eligible Obligations, which shall not
    contain provisions permitting the redemption or other prepayment thereof at
    the option of the issuer thereof, the principal of and the interest on
    which when due, without any regard to reinvestment thereof, will provide
    moneys which, together with the money, if any, deposited with or held by
    the Trustee or such Paying Agent, shall be sufficient, or

         (c)  a combination of (a) or (b) which shall be sufficient,

to pay when due the principal of and premium, if any, and interest, if any, due
and to become due on such Securities or portions thereof on or prior to
Maturity; provided, however, that in the case of the provision for payment or
redemption of less than all the Securities of any series or Tranche, such
Securities or portions thereof shall have been selected by the Security
Registrar as provided herein and, in the case of a redemption, the notice
requisite to the validity of such redemption shall have been given or
irrevocable authority shall have been given by the Company to the Trustee to
give such notice, under arrangements satisfactory to the 


                                         -37-
<PAGE>

Trustee; and provided, further, that the Company shall have delivered to the
Trustee and such Paying Agent:

         (x)  if such deposit shall have been made prior to the Maturity of
    such Securities, a Company Order stating that the money and Eligible
    Obligations deposited in accordance with this Section shall be held in
    trust, as provided in Section 703;

         (y)  if Eligible Obligations shall have been deposited, an Opinion of
    Counsel that the obligations so deposited constitute Eligible Obligations
    and do not contain provisions permitting the redemption or other prepayment
    at the option of the issuer thereof, and an opinion of an independent
    public accountant of nationally recognized standing, selected by the
    Company, to the effect that the requirements set forth in clause (b) above
    have been satisfied; and

         (z)  if such deposit shall have been made prior to the Maturity of
    such Securities, an Officer's Certificate stating the Company's intention
    that, upon delivery of such Officer's Certificate, its indebtedness in
    respect of such Securities or portions thereof will have been satisfied and
    discharged as contemplated in this Section.

    Upon the deposit of money or Eligible Obligations, or both, in accordance
with this Section, together with the documents required by clauses (x), (y) and
(z) above, the Trustee shall, upon receipt of a Company Request, acknowledge in
writing that the Security or Securities or portions thereof with respect to
which such deposit was made are deemed to have been paid for all purposes of
this Indenture and that the entire indebtedness of the Company in respect
thereof has been satisfied and discharged as contemplated in this Section.  In
the event that all of the conditions set forth in the preceding paragraph shall
have been satisfied in respect of any Securities or portions thereof except
that, for any reason, the Officer's Certificate specified in clause (z) shall
not have been delivered, such Securities or portions thereof shall nevertheless
be deemed to have been paid for all purposes of this Indenture, and the Holders
of such Securities of portions thereof shall nevertheless be no longer entitled
to the benefits of this Indenture or of any of the covenants of the Company
under Article Six (except the covenants contained in Sections 602, 603 and 604)
or any other covenants made in respect of such Securities or portions thereof as
contemplated by Section 301, but the indebtedness of the Company in respect of
such Securities or portions thereof shall not be deemed to have been satisfied
and discharged prior to Maturity for any other purpose, and the Holders of such
Securities or portions thereof shall continue to be entitled to look to the
Company for payment of the indebtedness represented thereby; and, upon Company
Request, the Trustee shall acknowledge in writing that such Securities or
portions thereof are deemed to have been paid for all purposes of this
Indenture.


                                         -38-
<PAGE>

    If payment at Stated Maturity of less than all of the Securities of any
series, or any Tranche thereof, is to be provided for in the manner and with the
effect provided in this Section, the Security Registrar shall select such
Securities, or portions of principal amount thereof, in the manner specified by
Section 403 for selection for redemption of less than all the Securities of a
series or Tranche.

    In the event that Securities which shall be deemed to have been paid for
purposes of this Indenture, and, if such is the case, in respect of which the
Company's indebtedness shall have been satisfied and discharged, all as provided
in this Section do not mature and are not to be redeemed within the sixty (60)
day period commencing with the date of the deposit of moneys or Eligible
Obligations, as aforesaid, the Company shall, as promptly as practicable, give a
notice, in the same manner as a notice of redemption with respect to such
Securities, to the Holders of such Securities to the effect that such deposit
has been made and the effect thereof.

    Notwithstanding that any Securities shall be deemed to have been paid for
purposes of this Indenture, as aforesaid, the obligations of the Company and the
Trustee in respect of such Securities under Sections 304, 305, 306, 403, 404,
406, 503 (as to notice of redemption), 602, 603, 907, 909, 910 and 915 and this
Article Seven shall survive.

    The Company shall pay, and shall indemnify the Trustee or any Paying Agent
with which Eligible Obligations shall have been deposited as provided in this
Section against, any tax, fee or other charge imposed on or assessed against
such Eligible Obligations or the principal or interest received in respect of
such Eligible Obligations, including, but not limited to, any such tax payable
by any entity deemed, for tax purposes, to have been created as a result of such
deposit.

    Anything herein to the contrary notwithstanding, (a) if, at any time after
a Security would be deemed to have been paid for purposes of this Indenture,
and, if such is the case, the Company's indebtedness in respect thereof would be
deemed to have been satisfied or discharged, pursuant to this Section (without
regard to the provisions of this paragraph), the Trustee or any Paying Agent, as
the case may be, shall be required to return the money or Eligible Obligations,
or combination thereof, deposited with it as aforesaid to the Company or its
representative under any applicable Federal or State bankruptcy, insolvency or
other similar law, such Security shall thereupon be deemed retroactively not to
have been paid and any satisfaction and discharge of the Company's indebtedness
in respect thereof shall retroactively be deemed not to have been effected, and
such Security shall be deemed to remain Outstanding and (b) any satisfaction and
discharge of the Company's indebtedness in respect of any Security shall be
subject to the provisions of the last paragraph of Section 603.


                                         -39-
<PAGE>

SECTION 702.  SATISFACTION AND DISCHARGE OF INDENTURE.

    This Indenture shall upon Company Request cease to be of further effect
(except as hereinafter expressly provided), and the Trustee, at the expense of
the Company, shall execute proper instruments acknowledging satisfaction and
discharge of this Indenture, when

         (a)  no Securities remain Outstanding hereunder; and

         (b)  the Company has paid or caused to be paid all other sums payable
    hereunder by the Company;

provided, however, that it, in accordance with the last paragraph of Section
701, any Security, previously deemed to have been paid for purposes of this
Indenture, shall be deemed retroactively not to have been so paid, this
Indenture shall thereupon be deemed retroactively not to have been satisfied and
discharged, as aforesaid, and to remain in full force and effect, and the
Company shall execute and deliver such instruments as the Trustee shall
reasonably request to evidence and acknowledge the same.

    Notwithstanding the satisfaction and discharge of this Indenture as
aforesaid, the obligations of the Company and the Trustee under Sections 304,
305, 306, 403,   404, 406, 503 (as to notice of redemption), 602, 603, 907, 909,
910 and 915 and this Article Seven shall survive.

    Upon satisfaction and discharge of this Indenture as provided in this
Section, the Trustee shall assign, transfer and turn over to the Company,
subject to the lien provided by Section 907, any and all money, securities and
other property then held by the Trustee for the benefit of the Holders of the
Securities other than money and Eligible Obligations held by the Trustee
pursuant to Section 703.

SECTION 703.  APPLICATION OF TRUST MONEY.

    Neither the Eligible Obligations nor the money deposited pursuant to
Section 701, nor the principal or interest payments on any such Eligible
Obligations, shall be withdrawn or used for any purpose other than, and such
Eligible Obligations and money deposited and the principal and interest payments
on any such Eligible Obligations shall be held in trust for, the payment of the
principal of and premium, if any, and interest, if any, on the Securities or
portions of principal amount thereof in respect of which such deposit was made,
all subject, however, to the provisions of Section 603; provided, however, that,
so long as there shall not have occurred and be continuing an Event of Default,
any cash received from such principal or interest payments on such Eligible
Obligations, if not then needed for such purpose, shall, to the extent
practicable, be invested in Eligible Obligations of the type described in 


                                         -40-
<PAGE>

clause (b) in the first paragraph of Section 701 maturing at such times and in
such amounts as shall be sufficient to pay when due the principal of and
premium, if any, and interest, if any, due and to become due on such Securities
or portions thereof on and prior to the Maturity thereof, and interest earned
from such reinvestment shall be paid over to the Company as received, free and
clear of any trust, lien or pledge under this Indenture except the lien provided
by Section 907; and provided, further, that, so long as there shall not have
occurred and be continuing an Event of Default, any moneys held in accordance
with this Section on the Maturity of all such Securities in excess of the amount
required to pay the principal of and premium, if any, and interest, if any, then
due on such Securities shall be paid over to the Company free and clear of any
trust, lien or pledge under this Indenture except the lien provided by Section
907, and provided, further, that if an Event of Default shall have occurred and
be continuing, moneys to be paid over to the Company pursuant to this Section
shall be held until such Event of Default shall have been waived or cured.

                                    ARTICLE EIGHT
                                           
                             EVENTS OF DEFAULT; REMEDIES
                                           
SECTION 801.  EVENTS OF DEFAULT.

    "Event of Default", wherever used herein with respect to Securities of any
series, means any one of the following events:

         (a)  failure to pay interest, if any, on any Security of such series
    within 60 days after the same becomes due and payable; or

         (b)  failure to pay the principal of or premium, if any, on any
    Security of such series within three Business Days after its Maturity; or

         (c)  failure to perform, or breach of, any covenant or warranty of the
    Company in this Indenture (other than a covenant or warranty a default in
    the performance of which or breach of which is elsewhere in this Section
    specifically dealt with or which has expressly been included in this
    Indenture solely for the benefit of one or more series of Securities other
    than such series) for a period of 60 days after there has been given, by
    registered or certified mail, to the Company by the Trustee, or to the
    Company and the Trustee by the Holders of at least 33% in principal amount
    of the Outstanding Securities of such series, a written notice specifying
    such default or breach and requiring it to be remedied and stating that
    such notice is a "Notice of Default" hereunder, unless the Trustee, or the
    Trustee and the Holders of a principal amount of Securities of such series
    not less than the principal amount of Securities the Holders of which gave
    such notice, as the case may 


                                         -41-
<PAGE>

    be, shall agree in writing to an extension of such period prior to its
    expiration; provided, however, that the Trustee, or the Trustee and the
    Holders of such principal amount of Securities of such series, as the case
    may be, shall be deemed to have agreed to an extension of such period if
    corrective action is initiated by the Company within such period and is
    being diligently pursued; or

         (d)  the entry by a court having jurisdiction in the premises of (1) a
    decree or order for relief in respect of the Company in an involuntary case
    or proceeding under any applicable Federal or State bankruptcy, insolvency,
    reorganization or other similar law or (2) a decree or order adjudging the
    Company a bankrupt or insolvent, or approving as properly filed a petition
    by one or more Persons other than the Company seeking reorganization,
    arrangement, adjustment or composition of or in respect of the Company
    under any applicable Federal or State law, or appointing a custodian,
    receiver, liquidator, assignee, trustee, sequestrator or other similar
    official for the Company or for any substantial part of its property, or
    ordering the winding up or liquidation of its affairs, and any such decree
    or order for relief or any such other decree or order shall have remained
    unstayed and in effect for a period of 90 consecutive days; or

         (e)  the commencement by the Company of a voluntary case or proceeding
    under any applicable Federal or State bankruptcy, insolvency,
    reorganization or other similar law or of any other case or proceeding to
    be adjudicated a bankrupt or insolvent, or the consent by it to the entry
    of a decree or order for relief in respect of the Company in a case or
    proceeding under any applicable Federal or State bankruptcy, insolvency,
    reorganization or other similar law or to the commencement of any
    bankruptcy or insolvency case or proceeding against it, or the filing by it
    of a petition or answer or consent seeking reorganization or relief under
    any applicable Federal or State law, or the consent by it to the filing of
    such petition or to the appointment of or taking possession by a custodian,
    receiver, liquidator, assignee, trustee, sequestrator or similar official
    of the Company or of any substantial part of its property, or the making by
    it of an assignment for the benefit of creditors, or the admission by it in
    writing of its inability to pay its debts generally as they become due, or
    the authorization of such action by the Board of Directors; or

         (f)  any other Event of Default specified with respect to Securities
    of such series.


                                         -42-
<PAGE>

SECTION 802.  ACCELERATION OF MATURITY; RESCISSION AND ANNULMENT.

    If an Event of Default shall have occurred and be continuing with respect
to Securities of any series at the time Outstanding, then in every such case the
Trustee or the Holders of not less than 33% in principal amount of the
Outstanding Securities of such series may declare the principal amount (or, if
any of the Securities of such series are Discount Securities, such portion of
the principal amount of such Securities as may be specified in the terms thereof
as contemplated by Section 301) of all of the Securities of such series to be
due and payable immediately, by a notice in writing to the Company (and to the
Trustee if given by Holders), and upon receipt by the Company of notice of such
declaration such principal amount (or specified amount) shall become immediately
due and payable; provided, however, that if an Event of Default shall have
occurred and be continuing with respect to more than one series of Securities,
the Trustee or the Holders of not less than 33% in aggregate principal amount of
the Outstanding Securities of all such series, considered as one class (and not
the Holders of the Securities of any one of such series), may make such
declaration of acceleration.

    At any time after such a declaration of acceleration with respect to
Securities of any series shall have been made and before a judgment or decree
for payment of the money due shall have been obtained by the Trustee as
hereinafter in this Article provided, the Event or Events of Default giving rise
to such declaration of acceleration shall, without further act, be deemed to
have been waived, and such declaration and its consequences shall, without
further act, be deemed to have been rescinded and annulled, if

         (a)  the Company shall have paid or deposited with the Trustee a sum
    sufficient to pay

              (1)  all overdue interest on all Securities of such series;

              (2)  the principal of and premium, if any, on any Securities of
         such series which have become due otherwise than by such declaration
         of acceleration and interest thereon at the rate or rates prescribed
         therefor in such Securities;

              (3)  to the extent that payment of such interest is lawful,
         interest upon overdue interest at the rate or rates prescribed
         therefor in such Securities;

              (4)  all amounts due to the Trustee under Section 907; and

         (b)  any other Event or Events of Default with respect to Securities
    of such series, other than the non-payment of the principal of Securities
    of such 



                                         -43-
<PAGE>

    series which shall have become due solely by such declaration of
    acceleration, shall have been cured or waived as provided in Section 813.

No such rescission shall affect any subsequent Event of Default or impair any
right consequent thereon.

SECTION 803.  COLLECTION OF INDEBTEDNESS AND SUITS FOR ENFORCEMENT BY TRUSTEE.

    If an Event of Default described in clause (a) or (b) of Section 801 shall
have occurred and be continuing, the Company shall, upon demand of the Trustee,
pay to it, for the benefit of the Holders of the Securities of the series with
respect to which such Event of Default shall have occurred, the whole amount
then due and payable on such Securities for principal and premium, if any, and
interest, if any, and, to the extent permitted by law, interest on premium, if
any, and on any overdue principal and interest, at the rate or rates prescribed
therefor in such Securities, and, in addition thereto, such further amount as
shall be sufficient to cover any amounts due to the Trustee under Section 907.

    If the Company shall fail to pay such amounts forthwith upon such demand,
the Trustee, in its own name and as trustee of an express trust, may institute a
judicial proceeding for the collection of the sums so due and unpaid, may
prosecute such proceeding to judgment or final decree and may enforce the same
against the Company or any other obligor upon such Securities and collect the
moneys adjudged or decreed to be payable in the manner provided by law out of
the property of the Company or any other obligor upon such Securities, wherever
situated.

    If an Event of Default with respect to Securities of any series shall have
occurred and be continuing, the Trustee may in its discretion proceed to protect
and enforce its rights and the rights of the Holders of Securities of such
series by such appropriate judicial proceedings as the Trustee shall deem most
effectual to protect and enforce any such rights, whether for the specific
enforcement of any covenant or agreement in this Indenture or in aid of the
exercise of any power granted herein, or to enforce any other proper remedy.

SECTION 804.  TRUSTEE MAY FILE PROOFS OF CLAIM.

    In case of the pendency of any receivership, insolvency, liquidation,
bankruptcy, reorganization, arrangement, adjustment, composition or other
judicial proceeding relative to the Company or any other obligor upon the
Securities or the property of the Company or of such other obligor or their
creditors, the Trustee (irrespective of whether the principal of the Securities
shall then be due and payable as therein expressed or by declaration or
otherwise and irrespective of whether the Trustee shall have made any demand on
the Company for the payment of overdue 


                                         -44-
<PAGE>

principal or interest) shall be entitled and empowered, by intervention in such
proceeding or otherwise,

         (a)  to file and prove a claim for the whole amount of principal,
    premium, if any, and interest, if any, owing and unpaid in respect of the
    Securities and to file such other papers or documents as may be necessary
    or advisable in order to have the claims of the Trustee (including any
    claim for amounts due to the Trustee under Section 907) and of the Holders
    allowed in such judicial proceeding, and

         (b)  to collect and receive any moneys or other property payable or
    deliverable on any such claims and to distribute the same;

and any custodian, receiver, assignee, trustee, liquidator, sequestrator or
other similar official in any such judicial proceeding is hereby authorized by
each Holder to make such payments to the Trustee and, in the event that the
Trustee shall consent to the making of such payments directly to the Holders, to
pay to the Trustee any amounts due it under Section 907.

    Nothing herein contained shall be deemed to authorize the Trustee to
authorize or consent to or accept or adopt on behalf of any Holder any plan of
reorganization, arrangement, adjustment or composition affecting the Securities
or the rights of any Holder thereof or to authorize the Trustee to vote in
respect of the claim of any Holder in any such proceeding.

SECTION 805.  TRUSTEE MAY ENFORCE CLAIMS WITHOUT POSSESSION OF SECURITIES.

    All rights of action and claims under this Indenture or the Securities may
be prosecuted and enforced by the Trustee without the possession of any of the
Securities or the production thereof in any proceeding relating thereto, and any
such proceeding instituted by the Trustee shall be brought in its own name as
trustee of an express trust, and any recovery of judgment shall, after provision
for the payment of the reasonable compensation, expenses, disbursements and
advances of the Trustee, its agents and counsel, be for the ratable benefit of
the Holders in respect of which such judgment has been recovered.

SECTION 806.  APPLICATION OF MONEY COLLECTED.

    Any money collected by the Trustee pursuant to this Article shall be
applied in the following order, at the date or dates fixed by the Trustee and,
in case of the distribution of such money on account of principal or premium, if
any, or interest, if any, upon presentation of the Securities in respect of
which or for the benefit of which such money shall have been collected and the
notation thereon of the payment if only partially paid and upon surrender
thereof if fully paid:


                                         -45-
<PAGE>

         FIRST:  To the payment of all amounts due the Trustee under
    Section 907;

         SECOND:  To the payment of the amounts then due and unpaid upon the
    Securities for principal of and premium, if any, and interest, if any, in
    respect of which or for the benefit of which such money has been collected,
    ratably, without preference or priority of any kind, according to the
    amounts due and payable on such Securities for principal, premium, if any,
    and interest, if any, respectively; and

         THIRD:  To the Company.

SECTION 807.  LIMITATION ON SUITS.

    No Holder shall have any right to institute any proceeding, judicial or
otherwise, with respect to this Indenture, or for the appointment of a receiver
or trustee, or for any other remedy hereunder, unless:

         (a)  such Holder shall have previously given written notice to the
    Trustee of a continuing Event of Default with respect to the Securities of
    such series;

         (b)  the Holders of not less than a majority in aggregate principal
    amount of the Outstanding Securities of all series in respect of which an
    Event of Default shall have occurred and be continuing, considered as one
    class, shall have made written request to the Trustee to institute
    proceedings in respect of such Event of Default in its own name as Trustee
    hereunder;

         (c)  such Holder or Holders shall have offered to the Trustee
    reasonable indemnity against the costs, expenses and liabilities to be
    incurred in compliance with such request;

         (d)  the Trustee for 60 days after its receipt of such notice, request
    and offer of indemnity shall have failed to institute any such proceeding;
    and

         (e)  no direction inconsistent with such written request shall have
    been given to the Trustee during such 60-day period by the Holders of a
    majority in aggregate principal amount of the Outstanding Securities of all
    series in respect of which an Event of Default shall have occurred and be
    continuing, considered as one class;

it being understood and intended that no one or more of such Holders shall have
any right in any manner whatever by virtue of, or by availing of, any provision
of this Indenture to affect, disturb or prejudice the rights of any other of
such Holders 


                                         -46-
<PAGE>

or to obtain or to seek to obtain priority or preference over any other of such
Holders or to enforce any right under this Indenture, except in the manner
herein provided and for the equal and ratable benefit of all of such Holders.

SECTION 808.  UNCONDITIONAL RIGHT OF HOLDERS TO RECEIVE PRINCIPAL, PREMIUM AND 
    INTEREST.

    Notwithstanding any other provision in this Indenture, the Holder of any
Security shall have the right, which is absolute and unconditional, to receive
payment of the principal of and premium, if any, and (subject to Section 307)
interest, if any, on such Security on the Stated Maturity or Maturities
expressed in such Security (or, in the case of redemption, on the Redemption
Date) and to institute suit for the enforcement of any such payment, and such
rights shall not be impaired without the consent of such Holder.

SECTION 809.  RESTORATION OF RIGHTS AND REMEDIES.

    If the Trustee or any Holder has instituted any proceeding to enforce any
right or remedy under this Indenture and such proceeding shall have been
discontinued or abandoned for any reason, or shall have been determined
adversely to the Trustee or to such Holder, then and in every such case, subject
to any determination in such proceeding, the Company, and Trustee and such
Holder shall be restored severally and respectively to their former positions
hereunder and thereafter all rights and remedies of the Trustee and such Holder
shall continue as though no such proceeding had been instituted.

SECTION 810.  RIGHTS AND REMEDIES CUMULATIVE.

    Except as otherwise provided in the last paragraph of Section 306, no right
or remedy herein conferred upon or reserved to the Trustee or to the Holders is
intended to be exclusive of any other right or remedy, and every right and
remedy shall, to the extent permitted by law, be cumulative and in addition to
every other right and remedy given hereunder or now or hereafter existing at law
or in equity or otherwise.  The assertion or employment of any right or remedy
hereunder, or otherwise, shall not prevent the concurrent assertion or
employment of any other appropriate right or remedy.

SECTION 811.  DELAY OR OMISSION NOT WAIVER.

    No delay or omission of the Trustee or of any Holder to exercise any right
or remedy accruing upon any Event of Default shall impair any such right or
remedy or constitute a waiver of any such Event of Default or an acquiescence
therein.  Every right and remedy given by this Article or by law to the Trustee
or to the 


                                         -47-
<PAGE>

Holders may be exercised from time to time, and as often as may be deemed
expedient, by the Trustee or by the Holders, as the case may be.

SECTION 812.  CONTROL BY HOLDERS OF SECURITIES.

    If an Event of Default shall have occurred and be continuing in respect of
a series of Securities, the Holders of a majority in principal amount of the
Outstanding Securities of such series shall 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 Securities of such series; provided, however, that if an Event of Default
shall have occurred and be continuing with respect to more than one series of
Securities, the Holders of a majority in aggregate principal amount of the
Outstanding Securities of all such series, considered as one class, shall have
the right to make such direction, and not the Holders of the Securities of any
one of such series; and provided, further, that

         (a)  such direction shall not be in conflict with any rule of law or
    with this Indenture, and could not involve the Trustee in personal
    liability in circumstances where indemnity would not, in the Trustee's sole
    discretion, be adequate, and

         (b)  the Trustee may take any other action deemed proper by the
    Trustee which is not inconsistent with such direction.

SECTION 813.  WAIVER OF PAST DEFAULTS.

    The Holders of not less than a majority in principal amount of the
Outstanding Securities of any series may on behalf of the Holders of all the
Securities of such series waive any past default hereunder with respect to such
series and its consequences, except a default

         (a)  in the payment of the principal of or premium, if any, or
    interest, if any, on any Security of such series, or

         (b)  in respect of a covenant or provision hereof which under Section
    1202 cannot be modified or amended without the consent of the Holder of
    each Outstanding Security of such series affected.

    Upon any such waiver, such default shall cease to exist, and any and all
Events of Default arising therefrom shall be deemed to have been cured, for
every purpose of this Indenture; but no such waiver shall extend to any
subsequent or other default or impair any right consequent thereon.


                                         -48-
<PAGE>

SECTION 814.  UNDERTAKING FOR COSTS.

    The Company and the Trustee agree, and each Holder by his acceptance
thereof shall be deemed to have agreed, that any court may in its discretion
require, in any suit for the enforcement of any right or remedy under this
Indenture, or in any suit against the Trustee for any action taken, suffered or
omitted by it as Trustee, the filing by any party litigant in such suit of an
undertaking to pay the costs of such suit, and that such court may in its
discretion assess reasonable costs, including reasonable attorneys' fees,
against any party litigant in such suit, having due regard to the merits and
good faith of the claims or defenses made by such party litigant; but the
provisions of this Section shall not apply to any suit instituted by the
Company, to any suit instituted by the Trustee, to any suit instituted by any
Holder, or group of Holders, holding in the aggregate more than 10% in aggregate
principal amount of the Outstanding Securities of all series in respect of which
such suit may be brought, considered as one class, or to any suit instituted by
any Holder for the enforcement of the payment of the principal of or premium, if
any, or interest, if any, on any Security on or after the Stated Maturity or
Maturities expressed in such Security (or, in the case of redemption, on or
after the Redemption Date).

SECTION 815.  WAIVER OF STAY OR EXTENSION LAWS.

    The Company covenants (to the extent that it may lawfully do so) that it
will not at any time insist upon, or plead, or in any manner whatsoever claim or
take the benefit or advantage of, any stay or extension law wherever enacted,
now or at any time hereafter in force, which may affect the covenants or the
performance of this Indenture; and the Company (to the extent that it may
lawfully do so) hereby expressly waives all benefit or advantage of any such law
and covenants that it will not hinder, delay or impede the execution of any
power herein granted to the Trustee, but will suffer and permit the execution of
every such power as though no such law had been enacted.

                                     ARTICLE NINE
                                           
                                     THE TRUSTEE
                                           
SECTION 901.  CERTAIN DUTIES AND RESPONSIBILITIES.

         (a)  Except during the continuance of an Event of Default with respect
    to Securities of any series,

              (1)  the Trustee undertakes to perform, with respect to
         Securities of such series, such duties and only such duties as are
         specifically set forth in this Indenture, and no implied covenants or
         obligations shall be read into this Indenture against the Trustee; and


                                         -49-
<PAGE>

              (2)  in the absence of bad faith on its part, the Trustee may,
         with respect to Securities of such series, conclusively rely, as to
         the truth of the statements and the correctness of the opinions
         expressed therein, upon certificates or opinions furnished to the
         Trustee and conforming to the requirements of this Indenture; but in
         the case of any such certificates or opinions which by any provision
         hereof are specifically required to be furnished to the Trustee, the
         Trustee shall be under a duty to examine the same to determine whether
         or not they conform to the requirements of this Indenture.

         (b)  In case an Event of Default with respect to Securities of any
    series shall have occurred and be continuing, the Trustee shall exercise,
    with respect to Securities of such series, such of the rights and powers
    vested in it by this Indenture, and use the same degree of care and skill
    in their exercise, as a prudent man would exercise or use under the
    circumstances in the conduct of his own affairs.

         (c)  No provision of this Indenture shall be construed to relieve the
    Trustee from liability for its own negligent action, its own negligent
    failure to act, or its own willful misconduct, except that

              (1)  this clause (c) shall not be construed to limit the effect
         of clause (a) of this Section;

              (2)  the Trustee shall not be liable for any error of judgment
         made in good faith by a Responsible Officer, unless it shall be proved
         that the Trustee was negligent in ascertaining the pertinent facts;

              (3)  the Trustee shall not be liable with respect to any action
         taken or omitted to be taken by it in good faith in accordance with
         the direction of the Holders of a majority in principal amount of the
         Outstanding Securities of any one or more series, as provided herein,
         relating to the time, method and place of conducting any proceeding
         for any remedy available to the Trustee, or exercising any trust or
         power conferred upon the Trustee, under this Indenture with respect to
         the Securities of such series; and

              (4)  no provision of this Indenture shall require the Trustee to
         expend or risk its own funds or otherwise incur any financial
         liability in the performance of any of its duties hereunder, or in the
         exercise of any of its rights or powers, if it shall have reasonable
         grounds for believing that repayment of such funds or adequate
         indemnity against such risk or liability is not reasonably assured to
         it.


                                         -50-
<PAGE>

         (d)  Whether or not therein expressly so provided, every provision of
    this Indenture relating to the conduct or affecting the liability of or
    affording protection to the Trustee shall be subject to the provisions of
    this Section.

SECTION 902.  NOTICE OF DEFAULTS.

    The Trustee shall give notice of any default hereunder with respect to the
Securities of any series to the Holders of Securities of such series in the
manner and to the extent required to do so by the Trust Indenture Act, unless
such default shall have been cured or waived; provided, however, that in the
case of any default of the character specified in clause (c) of Section 801, no
such notice to Holders shall be given until at least 75 days after the
occurrence thereof.  For the purpose of this Section, the term "default" means
any event which is, or after notice or lapse of time, or both, would become, an
Event of Default.

SECTION 903.  CERTAIN RIGHTS OF TRUSTEE.

    Subject to the provisions of Section 901 and to the applicable provisions
of the Trust Indenture Act:

         (a)  the Trustee may rely and shall be protected in acting or
    refraining from acting upon any resolution, certificate, statement,
    instrument, opinion, report, notice, request, direction, consent, order,
    bond, debenture, note, other evidence of indebtedness or other paper or
    document believed by it to be genuine and to have been signed or presented
    by the proper party or parties;

         (b)  any request or direction of the Company mentioned herein shall be
    sufficiently evidenced by a Company Request or Company Order, or as
    otherwise expressly provided herein, and any resolution of the Board of
    Directors may be sufficiently evidenced by a Board Resolution;

         (c)  whenever in the administration of this Indenture the Trustee
    shall deem it desirable that a matter be proved or established prior to
    taking, suffering or omitting any action hereunder, the Trustee (unless
    other evidence be herein specifically prescribed) may, in the absence of
    bad faith on its part, rely upon an Officer's Certificate;

         (d)  the Trustee may consult with counsel and the written advice of
    such counsel or any Opinion of Counsel shall be full and complete
    authorization and protection in respect of any action taken, suffered or
    omitted by it hereunder in good faith and in reliance thereon;


                                         -51-
<PAGE>

         (e)  the Trustee shall be under no obligation to exercise any of the
    rights or powers vested in it by this Indenture at the request or direction
    of any Holder pursuant to this Indenture, unless such Holder shall have
    offered to the Trustee reasonable security or indemnity against the costs,
    expenses and liabilities which might be incurred by it in compliance with
    such request or direction;

         (f)  the Trustee shall not be bound to make any investigation into the
    facts or matters stated in any resolution, certificate, statement,
    instrument, opinion, report, notice, request, direction, consent, order,
    bond, debenture, note, other evidence of indebtedness or other paper or
    document, but the Trustee, in its discretion, may make such further inquiry
    or investigation into such facts or matters as it may see fit, and, if the
    Trustee shall determine to make such further inquiry or investigation, it
    shall (subject to applicable legal requirements) be entitled to examine,
    during normal business hours, the books, records and premises of the
    Company, personally or by agent or attorney;

         (g)  the Trustee may execute any of the trusts or powers hereunder or
    perform any duties hereunder either directly or by or through agents or
    attorneys and the Trustee shall not be responsible for any misconduct or
    negligence on the part of any agent or attorney appointed with due care by
    it hereunder; and

         (h)  except as otherwise provided in Section 801, the Trustee shall
    not be charged with knowledge of any Event of Default with respect to the
    Securities of any series for which it is acting as Trustee unless either
    (1) a Responsible Officer of the Trustee shall have actual knowledge of the
    Event of Default or (2) written notice of such Event of Default shall have
    been given to the Trustee by the Company, any other obligor on such
    Securities or by any Holder of such Securities.

SECTION 904.  NOT RESPONSIBLE FOR RECITALS OR ISSUANCE OF SECURITIES.

    The recitals contained herein and in the Securities (except the Trustee's
certificates of authentication) shall be taken as the statements of the Company,
and neither the Trustee nor any Authenticating Agent assumes responsibility for
their correctness.  The Trustee makes no representations as to the validity or
sufficiency of this Indenture or of the Securities.  Neither the Trustee nor any
Authenticating Agent shall be accountable for the use or application by the
Company of Securities or the proceeds thereof.


                                         -52-
<PAGE>

SECTION 905.  MAY HOLD SECURITIES.

    Each of the Trustee, any Authenticating Agent, any Paying Agent, any
Security Registrar or any other agent of the Company or the Trustee, in its
individual or any other capacity, may become the owner or pledgee of Securities
and, subject to Sections 908 and 913, may otherwise deal with the Company with
the same rights it would have if it were not the Trustee, Authenticating Agent,
Paying Agent, Security Registrar or such other agent.

SECTION 906.  MONEY HELD IN TRUST.

    Money held by the Trustee in trust hereunder need not be segregated from
other funds, except to the extent required by law.  The Trustee shall be under
no liability for interest on or investment of any money received by it hereunder
except as expressly provided herein or otherwise agreed with, and for the sole
benefit of, the Company.

SECTION 907.  COMPENSATION AND REIMBURSEMENT.

    The Company shall

         (a)  pay to the Trustee from time to time reasonable compensation for
    all services rendered by it hereunder (which compensation shall not be
    limited by any provision of law in regard to the compensation of a trustee
    of an express trust);

         (b)  except as otherwise expressly provided herein, reimburse the
    Trustee upon its request for all reasonable expenses, disbursements and
    advances reasonably incurred or made by the Trustee in accordance with any
    provision of this Indenture (including the reasonable compensation and the
    expenses and disbursements of its agents and counsel), except to the extent
    that any such expense, disbursement or advance may be attributable to its
    negligence, willful misconduct or bad faith; and

         (c)  indemnify the Trustee and hold it harmless from and against, any
    loss, liability or expense reasonably incurred by it arising out of or in
    connection with the acceptance or administration of the trust or trusts
    hereunder or the performance of its duties hereunder, including the costs
    and expenses of defending itself against any claim or liability in
    connection with the exercise or performance of any of its powers or duties
    hereunder, except to the extent any such loss, liability or expense may be
    attributable to its negligence, willful misconduct or bad faith.


                                         -53-
<PAGE>

    As security for the performance of the obligations of the Company under
this Section, the Trustee shall have a lien prior to the Securities upon all
property and funds held or collected by the Trustee as such other than property
and funds held in trust under Section 703 (except as otherwise provided in
Section 703).  "Trustee" for purposes of this Section shall include any
predecessor Trustee; provided, however, that the negligence, willful misconduct
or bad faith of any Trustee hereunder shall not affect the rights of any other
Trustee hereunder.

SECTION 908.  DISQUALIFICATION; CONFLICTING INTERESTS.

    If the Trustee shall have or acquire any conflicting interest within the
meaning of the Trust Indenture Act, it shall either eliminate such conflicting
interest or resign to the extent, in the manner and with the effect, and subject
to the conditions, provided in the Trust Indenture Act and this Indenture.  For
purposes of Section 310(b)(1) of the Trust Indenture Act and to the extent
permitted thereby, the Trustee, in its capacity as trustee in respect of the
Securities of any series, shall not be deemed to have a conflicting interest
arising from its capacity as trustee in respect of the Securities of any other
series.

SECTION 909.  CORPORATE TRUSTEE REQUIRED; ELIGIBILITY.

    There shall at all times be a Trustee hereunder which shall be

         (a)  a corporation organized and doing business under the laws of the
    United States, any State or Territory thereof or the District of Columbia,
    authorized under such laws to exercise corporate trust powers, subject to
    supervision or examination by Federal or State authority and having a
    combined capital and surplus of at least $25,000,000 in the case of the
    initial Trustee named in the first paragraph of this Indenture or
    $50,000,000 in the case of any successor Trustee, or

         (b)  if and to the extent permitted by the Commission by rule,
    regulation or order upon application, a corporation or other Person
    organized and doing business under the laws of a foreign government,
    authorized under such laws to exercise corporate trust powers, having a
    combined capital and surplus of at least $50,000,000 or the Dollar
    equivalent of the applicable foreign currency and subject to supervision or
    examination by authority of such foreign government or a political
    subdivision thereof substantially equivalent to supervision or examination
    applicable to United States institutional trustees, and, in either case,
    qualified and eligible under this Article and the Trust Indenture Act.  If
    such corporation publishes reports of condition at least annually, pursuant
    to law or to the requirements of such supervising or examining authority,
    then for the purposes of this Section, the combined capital and surplus of
    such corporation shall be deemed to be its 


                                         -54-
<PAGE>

    combined capital and surplus as set forth in its most recent report of
    condition so published.  If at any time the Trustee shall cease to be
    eligible in accordance with the provisions of this Section, it shall resign
    immediately in the manner and with the effect hereinafter specified in this
    Article.

SECTION 910.  RESIGNATION AND REMOVAL; APPOINTMENT OF SUCCESSOR.

         (a)  No resignation or removal of the Trustee and no appointment of a
    successor Trustee pursuant to this Article shall become effective until the
    acceptance of appointment by the successor Trustee in accordance with the
    applicable requirements of Section 911.

         (b)  The Trustee may resign at any time with respect to the Securities
    of one or more series by giving written notice thereof to the Company.  If
    the instrument of acceptance by a successor Trustee required by Section 911
    shall not have been delivered to the Trustee within 30 days after the
    giving of such notice of resignation, the resigning Trustee may petition
    any court of competent jurisdiction for the appointment of a successor
    Trustee with respect to the Securities of such series.

         (c)  The Trustee may be removed at any time with respect to the
    Securities of any series by Act of the Holders of a majority in principal
    amount of the Outstanding Securities of such series delivered to the
    Trustee and to the Company.

         (d)  If at any time:

              (1)  the Trustee shall fail to comply with Section 908 after
         written request therefor by the Company or by any Holder who has been
         a bona fide Holder for at least six months, or

              (2)  the Trustee shall cease to be eligible under Section 909 and
         shall fail to resign after written request therefor by the Company or
         by any such Holder, or

              (3)  the Trustee shall become incapable of acting or shall be
         adjudged a bankrupt or insolvent or a receiver of the Trustee or of
         its property shall be appointed or any public officer shall take
         charge or control of the Trustee or of its property or affairs for the
         purpose of rehabilitation, conservation or liquidation,

    then, in any such case, (A) the Company by a Board Resolution may remove
    the Trustee with respect to all Securities or (B) subject to Section 814,
    any Holder who has been a bona fide Holder for at least six months may, on 



                                         -55-
<PAGE>

    behalf of itself and all others similarly situated, petition any court of
    competent jurisdiction for the removal of the Trustee with respect to all
    Securities and the appointment of a successor Trustee or Trustees.

         (e)  If the Trustee shall resign, be removed or become incapable of
    acting, or if a vacancy shall occur in the office of Trustee for any cause
    (other than as contemplated in clause (B) in clause (d) of this Section),
    with respect to the Securities of one or more series, the Company, by a
    Board Resolution, shall promptly appoint a successor Trustee or Trustees
    with respect to the Securities of that or those series (it being understood
    that any such successor Trustee may be appointed with respect to the
    Securities of one or more or all of such series and that at any time there
    shall be only one Trustee with respect to the Securities of any particular
    series) and shall comply with the applicable requirements of Section 911. 
    If, within one year after such resignation, removal or incapability, or the
    occurrence of such vacancy, a successor Trustee with respect to the
    Securities of any series shall be appointed by Act of the Holders of a
    majority in principal amount of the Outstanding Securities of such series
    delivered to the Company and the retiring Trustee, the successor Trustee so
    appointed shall, forthwith upon its acceptance of such appointment in
    accordance with the applicable requirements of Section 911, become the
    successor Trustee with respect to the Securities of such series and to that
    extent supersede the successor Trustee appointed by the Company.  If no
    successor Trustee with respect to the Securities of any series shall have
    been so appointed by the Company or the Holders and accepted appointment in
    the manner required by Section 911, any Holder who has been a bona fide
    Holder of a Security of such series for at least six months may, on behalf
    of itself and all others similarly situated, petition any court of
    competent jurisdiction for the appointment of a successor Trustee with
    respect to the Securities of such series.

         (f)  So long as no event which is, or after notice or lapse of time,
    or both, would become, an Event of Default shall have occurred and be
    continuing, and except with respect to a Trustee appointed by Act of the
    Holders of a majority in principal amount of the Outstanding Securities
    pursuant to subsection (e) of this Section, if the Company shall have
    delivered to the Trustee (1) a Board Resolution appointing a successor
    Trustee, effective as of a date specified therein, and (2) an instrument of
    acceptance of such appointment, effective as of such date, by such
    successor Trustee in accordance with Section 911, the Trustee shall be
    deemed to have resigned as contemplated in subsection (b) of this Section,
    the successor Trustee shall be deemed to have been appointed by the Company
    pursuant to subsection (e) of this Section and such appointment shall be
    deemed to have been accepted as contemplated in Section 911, all as of such
    date, and all other provisions of this Section and Section 911 shall be
    applicable to such 


                                         -56-
<PAGE>

    resignation, appointment and acceptance except to the extent inconsistent
    with this clause (f).

         (g)  The Company shall give notice of each resignation and each
    removal of the Trustee with respect to the Securities of any series and
    each appointment of a successor Trustee with respect to the Securities of
    any series by mailing written notice of such event by first-class mail,
    postage prepaid, to all Holders of Securities of such series as their names
    and addresses appear in the Security Register.  Each notice shall include
    the name of the successor Trustee with respect to the Securities of such
    series and the address of its corporate trust office.

SECTION 911.  ACCEPTANCE OF APPOINTMENT BY SUCCESSOR.

         (a)  In case of the appointment hereunder of a successor Trustee with
    respect to the Securities of all series, every such successor Trustee so
    appointed shall execute, acknowledge and deliver to the Company and to the
    retiring Trustee an instrument accepting such appointment, and thereupon
    the resignation or removal of the retiring Trustee shall become effective
    and such successor Trustee, without any further act, shall become vested
    with all the rights, powers, trusts and duties of the retiring Trustee;
    but, on the request of the Company or the successor Trustee, such retiring
    Trustee shall, upon payment of all sums owed to it, execute and deliver an
    instrument transferring to such successor Trustee all the rights, powers
    and trusts of the retiring Trustee and shall duly assign, transfer and
    deliver to such successor Trustee all property and money held by such
    retiring Trustee hereunder. 

         (b)  In case of the appointment hereunder of a successor Trustee with
    respect to the Securities of one or more (but not all) series, the Company,
    the retiring Trustee and each successor Trustee with respect to the
    Securities of such series shall execute and deliver an indenture
    supplemental hereto wherein each successor Trustee shall accept such
    appointment and which (1) shall contain such provisions as shall be
    necessary or desirable to transfer and confirm to, and to vest in, each
    successor Trustee all the rights, powers, trusts and duties of the retiring
    Trustee with respect to the Securities of that or those series to which the
    appointment of such successor Trustee relates, (2) if the retiring Trustee
    is not retiring with respect to all Securities, shall contain such
    provisions as shall be deemed necessary or desirable to confirm that all
    the rights, powers, trusts and duties of the retiring Trustee with respect
    to the Securities of that or those series as to which the retiring Trustee
    is not retiring shall continue to be vested in the retiring Trustee and (3)
    shall add to or change any of the provisions of this Indenture as shall be
    necessary to provide for or facilitate the administration of the trusts
    hereunder by more than one Trustee, it being understood that nothing herein
    or in such supplemental 


                                         -57-
<PAGE>

    indenture shall constitute such Trustees co-trustees of the same trust and
    that each such Trustee shall be trustee of a trust or trusts hereunder
    separate and apart from any trust or trusts hereunder administered by any
    other such Trustee; and upon the execution and delivery of such
    supplemental indenture the resignation or removal of the retiring Trustee
    shall become effective to the extent provided therein and each such
    successor Trustee, without any further act, shall become vested with all
    the rights, powers, trusts and duties of the retiring Trustee with respect
    to the Securities of that or those series to which the appointment of such
    successor Trustee relates; but, on request of the Company or any successor
    Trustee, such retiring Trustee, upon payment of all sums owed to it, shall
    duly assign, transfer and deliver to such successor Trustee all property
    and money held by such retiring Trustee hereunder with respect to the
    Securities of that or those series to which the appointment of such
    successor Trustee relates.

         (c)  Upon request of any such successor Trustee, the Company shall
    execute any instruments which fully vest in and confirm to such successor
    Trustee all such rights, powers and trusts referred to in clause (a) or (b)
    of this Section, as the case may be.

         (d)  No successor Trustee shall accept its appointment unless at the
    time of such acceptance such successor Trustee shall be qualified and
    eligible under this Article.

SECTION 912.  MERGER, CONVERSION, CONSOLIDATION OR SUCCESSION TO BUSINESS.

    Any corporation into which the Trustee may be merged or converted or with
which it may be consolidated, or any corporation resulting from any merger,
conversion or consolidation to which the Trustee shall be a party, or any
corporation succeeding to all or substantially all the corporate trust business
of the Trustee, shall be the successor of the Trustee hereunder, provided such
corporation shall be otherwise qualified and eligible under this Article,
without the execution or filing of any paper or any further act on the part of
any of the parties hereto.  In case any Securities shall have been
authenticated, but not delivered, by the Trustee then in office, any successor
by merger, conversion or consolidation to such authenticating Trustee may adopt
such authentication and deliver the Securities so authenticated with the same
effect as if such successor Trustee had itself authenticated such Securities.

SECTION 913.  PREFERENTIAL COLLECTION OF CLAIMS AGAINST COMPANY.

    If the Trustee shall be or become a creditor of the Company or any other
obligor upon the Securities (other than by reason of a relationship described in
Section 311(b) of the Trust Indenture Act), the Trustee shall be subject to any
and all 


                                         -58-
<PAGE>

applicable provisions of the Trust Indenture Act regarding the collection of
claims against the Company or such other obligor.  For purposes of Section
311(b) of the Trust Indenture Act:

         (a)  the term "cash transaction" means any transaction in which full
    payment for goods or securities sold is made within seven days after
    delivery of the goods or securities in currency or in checks or other
    orders drawn upon banks or bankers and payable upon demand;

         (b)  the term "self-liquidating paper" means any draft, bill of
    exchange, acceptance or obligation which is made, drawn, negotiated or
    incurred by the Company or such obligor for the purpose of financing the
    purchase, processing, manufacturing, shipment, storage or sale of goods,
    wares or merchandise and which is secured by documents evidencing title to,
    possession of, or a lien upon, the goods, wares or merchandise or the
    receivables or proceeds arising from the sale of the goods, wares or
    merchandise previously constituting the security, provided the security is
    received by the Trustee simultaneously with the creation of the creditor
    relationship with the Company or such obligor arising from the making,
    drawing, negotiating or incurring of the draft, bill of exchange,
    acceptance or obligation.

SECTION 914.  CO-TRUSTEES AND SEPARATE TRUSTEES.

    At any time or times, for the purpose of meeting the legal requirements of
any applicable jurisdiction, the Company and the Trustee shall have power to
appoint, and, upon the written request of the Trustee or of the Holders of at
least 33% in principal amount of the Securities then Outstanding, the Company
shall for such purpose join with the Trustee in the execution and delivery of
all instruments and agreements necessary or proper to appoint, one or more
Persons approved by the Trustee either to act as co-trustee, jointly with the
Trustee, or to act as separate trustee, in either case with such powers as may
be provided in the instrument of appointment, and to vest in such Person or
Persons, in the capacity aforesaid, any property, title, right or power deemed
necessary or desirable, subject to the other provisions of this Section.  If the
Company does not join in such appointment within 15 days after the receipt by it
of a request so to do, or if an Event of Default shall have occurred and be
continuing, the Trustee alone shall have power to make such appointment.

    Should any written instrument or instruments from the Company be required
by any co-trustee or separate trustee so appointed to more fully confirm to such
co-trustee or separate trustee such property, title, right or power, any and all
such instruments shall, on request, be executed, acknowledged and delivered by
the Company.


                                         -59-
<PAGE>

    Every co-trustee or separate trustee shall, to the extent permitted by law,
but to such extent only, be appointed subject to the following conditions:

         (a)  the Securities shall be authenticated and delivered, and all
    rights, powers, duties and obligations hereunder in respect of the custody
    of securities, cash and other personal property held by, or required to be
    deposited or pledged with, the Trustee hereunder, shall be exercised
    solely, by the Trustee;

         (b)  the rights, powers, duties and obligations hereby conferred or
    imposed upon the Trustee in respect of any property covered by such
    appointment shall be conferred or imposed upon and exercised or performed
    either by the Trustee or by the Trustee and such co-trustee or separate
    trustee jointly, as shall be provided in the instrument appointing such
    co-trustee or separate trustee, except to the extent that under any law of
    any jurisdiction in which any particular act is to be performed, the
    Trustee shall be incompetent or unqualified to perform such act, in which
    event such rights, powers, duties and obligations shall be exercised and
    performed by such co-trustee or separate trustee;

         (c)  the Trustee at any time, by an instrument in writing executed by
    it, with the concurrence of the Company, may accept the resignation of or
    remove any co-trustee or separate trustee appointed under this Section,
    and, if an Event of Default shall have occurred and be continuing, the
    Trustee shall have power to accept the resignation of, or remove, any such
    co-trustee or separate trustee without the concurrence of the Company. 
    Upon the written request of the Trustee, the Company shall join with the
    Trustee in the execution and delivery of all instruments and agreements
    necessary or proper to effectuate such resignation or removal.  A successor
    to any co-trustee or separate trustee so resigned or removed may be
    appointed in the manner provided in this Section;

         (d)  no co-trustee or separate trustee hereunder shall be personally
    liable by reason of any act or omission of the Trustee, or any other such
    trustee hereunder; and

         (e)  any Act of Holders delivered to the Trustee shall be deemed to
    have been delivered to each such co-trustee and separate trustee.

SECTION 915.  APPOINTMENT OF AUTHENTICATING AGENT.

    The Trustee may appoint an Authenticating Agent or Agents with respect to
the Securities of one or more series, or any Tranche thereof, which shall be
authorized to act on behalf of the Trustee to authenticate Securities of such
series or 


                                         -60-
<PAGE>

Tranche issued upon original issuance, exchange, registration of transfer or
partial redemption thereof or pursuant to Section 306, and Securities so
authenticated shall be entitled to the benefits of this Indenture and shall be
valid and obligatory for all purposes as if authenticated by the Trustee
hereunder.  Wherever reference is made in this Indenture to the authentication
and delivery of Securities by the Trustee or the Trustee's certificate of
authentication, such reference shall be deemed to include authentication and
delivery on behalf of the Trustee by an Authenticating Agent and a certificate
of authentication executed on behalf of the Trustee by an Authenticating Agent. 
Each Authenticating Agent shall be acceptable to the Company and shall at all
times be a corporation organized and doing business under the laws of the United
States, any State or Territory thereof or the District of Columbia or the
Commonwealth of Puerto Rico, authorized under such laws to act as Authenticating
Agent, having a combined capital and surplus of not less than $50,000,000 and
subject to supervision or examination by Federal or State authority.  If such
Authenticating Agent publishes reports of condition at least annually, pursuant
to law or to the requirements of said supervising or examining authority, then
for the purposes of this Section, the combined capital and surplus of such
Authenticating Agent shall be deemed to be its combined capital and surplus as
set forth in its most recent report of condition so published.  If at any time
an Authenticating Agent shall cease to be eligible in accordance with the
provisions of this Section, such Authenticating Agent shall resign immediately
in the manner and with the effect specified in this Section.

    Any corporation into which an Authenticating Agent may be merged or
converted or with which it may be consolidated, or any corporation resulting
from any merger, conversion or consolidation to which such Authenticating Agent
shall be a party, or any corporation succeeding to the corporate agency or
corporate trust business of an Authenticating Agent, shall continue to be an
Authenticating Agent, provided such corporation shall be otherwise eligible
under this Section, without the execution or filing of any paper or any further
act on the part of the Trustee or the Authenticating Agent.

    An Authenticating Agent may resign at any time by giving written notice
thereof to the Trustee and to the Company.  The Trustee may at any time
terminate the agency of an Authenticating Agent by giving written notice thereof
to such Authenticating Agent and to the Company.  Upon receiving such a notice
of resignation or upon such a termination, or in case at any time such
Authenticating Agent shall cease to be eligible in accordance with the
provisions of this Section, the Trustee may appoint a successor Authenticating
Agent which shall be acceptable to the Company.  Any successor Authenticating
Agent upon acceptance of its appointment hereunder shall become vested with all
the rights, powers and duties of its predecessor hereunder, with like effect as
if originally named as an Authenticating Agent.  No successor Authenticating
Agent shall be appointed unless eligible under the provisions of this Section.


                                         -61-
<PAGE>

    The Trustee agrees to pay to each Authenticating Agent from time to time
reasonable compensation for its services under this Section, and the Trustee
shall be entitled to be reimbursed for such payments, in accordance with, and
subject to the provisions of Section 907.

    The provisions of Sections 308, 904 and 905 shall be applicable to each
Authenticating Agent.

    If an appointment with respect to the Securities of one or more series, or
any Tranche thereof, shall be made pursuant to this Section, the Securities of
such series or Tranche may have endorsed thereon, in addition to the Trustee's
certificate of authentication, an alternate certificate of authentication
substantially in the following form:

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

                        First Trust National Association,
                        Trustee


                        By:
                           ---------------------------------------------
                                      As Authenticating Agent


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

    If all of the Securities of a series may not be originally issued at one
time, and if the Trustee does not have an office capable of authenticating
Securities upon original issuance located in a Place of Payment where the
Company wishes to have Securities of such series authenticated upon original
issuance, the Trustee, if so requested by the Company in writing (which writing
need not comply with Section 102 and need not be accompanied by an Opinion of
Counsel), shall appoint, in accordance with this Section and in accordance with
such procedures as shall be acceptable to the Trustee, an Authenticating Agent
having an office in a Place of Payment designated by the Company with respect to
such series of Securities.


                                         -62-
<PAGE>


                                     ARTICLE TEN

                  HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY

SECTION 1001. LISTS OF HOLDERS.

    Semiannually, not later than March 1 and September 1 in each year,
commencing March 1, 1998, and at such other times as the Trustee may request in
writing, the Company shall furnish or cause to be furnished to the Trustee
information as to the names and addresses of the Holders, and the Trustee shall
preserve such information and similar information received by it in any other
capacity and afford to the Holders access to information so preserved by it, all
to such extent, if any, and in such manner as shall be required by the Trust
Indenture Act; provided, however, that no such list need be furnished so long as
the Trustee shall be the Security Registrar.

SECTION 1002. REPORTS BY TRUSTEE AND COMPANY.

    Not later than July 1 in each year, commencing July 1, 1998, the Trustee
shall transmit to the Holders and the Commission a report, dated as of the next
preceding May 1, with respect to any events and other matters described in
Section 313(a) of the Trust Indenture Act, in such manner and to the extent
required by the Trust Indenture Act.  The Trustee shall transmit to the Holders
and the Commission, and the Company shall file with the Trustee (within thirty
(30) days after filing with the Commission in the case of reports which pursuant
to the Trust Indenture Act must be filed with the Commission and furnished to
the Trustee) and transmit to the Holders, such other information, reports and
other documents, if any, at such times and in such manner, as shall be required
by the Trust Indenture Act.

                                    ARTICLE ELEVEN
                                           
                 CONSOLIDATION, MERGER, CONVEYANCE OR OTHER TRANSFER
                                           
SECTION 1101. COMPANY MAY CONSOLIDATE, ETC., ONLY ON CERTAIN TERMS.

    The Company shall not consolidate with or merge into any other corporation,
or convey or otherwise transfer or lease its properties and assets substantially
as an entirety to any Person, unless

         (a)  the corporation formed by such consolidation or into which the
    Company is merged or the Person which acquires by conveyance or transfer,
    or which leases, the properties and assets of the Company substantially as
    an entirety shall be a Person organized and existing under the laws of the
    United States, any State thereof or the District of Columbia, and


                                         -63-
<PAGE>

    shall expressly assume, by an indenture supplemental hereto, executed and
    delivered to the Trustee, in form satisfactory to the Trustee, the due and
    punctual payment of the principal of and premium, if any, and interest, if
    any, on all Outstanding Securities and the performance of every covenant of
    this Indenture on the part of the Company to be performed or observed;

         (b)  immediately after giving effect to such transaction and treating
    any indebtedness for borrowed money which becomes an obligation of the
    Company as a result of such transaction as having been incurred by the
    Company at the time of such 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

         (c)  the Company shall have delivered to the Trustee an Officer's
    Certificate and an Opinion of Counsel, each stating that such
    consolidation, merger, conveyance, or other transfer or lease and such
    supplemental indenture comply with this Article and that all conditions
    precedent herein provided for relating to such transactions have been
    complied with.

SECTION 1102. SUCCESSOR CORPORATION SUBSTITUTED.

    Upon any consolidation by the Company with or merger by the Company into
any other corporation or any conveyance, or other transfer or lease of the
properties and assets of the Company substantially as an entirety in accordance
with Section 1101, the successor corporation formed by such consolidation or
into which the Company is merged or the Person to which such conveyance,
transfer or lease is made shall succeed to, and be substituted for, and may
exercise every right and power of, the Company under this Indenture with the
same effect as if such successor Person had been named as the Company herein,
and thereafter, except in the case of a lease, the predecessor Person shall be
relieved of all obligations and covenants under this Indenture and the
Securities Outstanding hereunder.

                                    ARTICLE TWELVE

                               SUPPLEMENTAL INDENTURES
                                           
SECTION 1201. SUPPLEMENTAL INDENTURES WITHOUT CONSENT OF HOLDERS.

    Without the consent of any Holders, the Company and the Trustee, at any
time and from time to time, may enter into one or more indentures supplemental
hereto, in form satisfactory to the Trustee, for any of the following purposes:


                                         -64-
<PAGE>


         (a)  to evidence the succession of another Person to the Company and
    the assumption by any such successor of the covenants of the Company herein
    and in the Securities, all as provided in Article Eleven; or

         (b)  to add one or more covenants of the Company or other provisions
    for the benefit of all Holders or for the benefit of the Holders of, or to
    remain in effect only so long as there shall be Outstanding, Securities of
    one or more specified series, or one or more specified Tranches thereof, or
    to surrender any right or power herein conferred upon the Company; or

         (c)  to add any additional Events of Default with respect to all or
    any series of Securities Outstanding hereunder; or

         (d)  to change or eliminate any provision of this Indenture or to add
    any new provision to this Indenture; provided, however, that if such
    change, elimination or addition shall adversely affect the interests of the
    Holders of Securities of any series or Tranche Outstanding on the date of
    such indenture supplemental hereto in any material respect, such change,
    elimination or addition shall become effective (1) with respect to such
    series or Tranche only pursuant to the provisions of Section 1202 hereof or
    (2) when no Security of such series or Tranche remains Outstanding; or

         (e)  to provide collateral security for all but not part of the
    Securities; or

         (f)  to establish the form or terms of Securities of any series or
    Tranche as contemplated by Sections 201 and 301; or

         (g)  to provide for the authentication and delivery of bearer
    securities and coupons appertaining thereto representing interest, if any,
    thereon and for the procedures for the registration, exchange and
    replacement thereof and for the giving of notice to, and the solicitation
    of the vote or consent of, the holders thereof, and for any and all other
    matters incidental thereto; or

         (h)  to evidence and provide for the acceptance of appointment
    hereunder by a separate or successor Trustee with respect to the Securities
    of one or more series and to add to or change any of the provisions of this
    Indenture as shall be necessary to provide for or facilitate the
    administration of the trusts hereunder by more than one Trustee, pursuant
    to the requirements of clause (b) of Section 911; or


                                         -65-
<PAGE>


         (i)  to provide for the procedures required to permit the Company to
    utilize, at its option, a non-certificated system of registration for all,
    or any series or Tranche of, the Securities; or

         (j)  to change any place or places where (1) the principal of and
    premium, if any, and interest, if any, on all or any series of Securities,
    or any Tranche thereof, shall be payable, (2) all or any series of
    Securities, or any Tranche thereof, may be surrendered for registration of
    transfer, (3) all or any series of Securities, or any Tranche thereof, may
    be surrendered for exchange and (4) notices and demands to or upon the
    Company in respect of all or any series of Securities, or any Tranche
    thereof, and this Indenture may be served; or

         (k)  to cure any ambiguity, to correct or supplement any provision
    herein which may be defective or inconsistent with any other provision
    herein, or to make any other changes to the provisions hereof or to add
    other provisions with respect to matters or questions arising under this
    Indenture, provided that such other changes or additions shall not
    adversely affect the interests of the Holders of Securities of any series
    or Tranche in any material respect.

    Without limiting the generality of the foregoing, if the Trust Indenture
    Act as in effect at the date of the execution and delivery of this Indenture
    or at any time thereafter shall be amended and

         (x)  if any such amendment shall require one or more changes to any
    provisions hereof or the inclusion herein of any additional provisions, or
    shall by operation of law be deemed to effect such changes or incorporate
    such provisions by reference or otherwise, this Indenture shall be deemed
    to have been amended so as to conform to such amendment to the Trust
    Indenture Act, and the Company and the Trustee may, without the consent of
    any Holders, enter into an indenture supplemental hereto to effect or
    evidence such changes or additional provisions; or

         (y)  if any such amendment shall permit one or more changes to, or the
    elimination of, any provisions hereof which, at the date of the execution
    and delivery hereof or at any time thereafter, are required by the Trust
    Indenture Act to be contained herein, this Indenture shall be deemed to
    have been amended to effect such changes or elimination, and the Company
    and the Trustee may, without the consent of any Holders, enter into an
    indenture supplemental hereto to evidence such amendment hereof.


                                         -66-
<PAGE>

SECTION 1202. SUPPLEMENTAL INDENTURES WITH CONSENT OF HOLDERS.

    With the consent of the Holders of not less than a majority in aggregate
principal amount of the Securities of all series then Outstanding under this
Indenture, considered as one class, by Act of said Holders delivered to the
Company and the Trustee, the Company, when authorized by a Board Resolution, and
the Trustee may enter into an indenture or indentures supplemental hereto for
the purpose of adding any provisions to, or changing in any manner or
eliminating any of the provisions of, this Indenture; provided, however, that if
there shall be Securities of more than one series Outstanding hereunder and if a
proposed supplemental indenture shall directly affect the rights of the Holders
of Securities of one or more, but less than all, of such series, then the
consent only of the Holders of a majority in aggregate principal amount of the
Outstanding Securities of all series so directly affected, considered as one
class, shall be required; and provided, further, that if the Securities of any
series shall have been issued in more than one Tranche and if the proposed
supplemental indenture shall directly affect the rights of the Holders of
Securities of one or more, but less than all, of such Tranches, then the consent
only of the Holders of a majority in aggregate principal amount of the
Outstanding Securities of all Tranches so directly affected, considered as one
class, shall be required; and provided, further, that no such supplemental
indenture shall:

         (a)  change the Stated Maturity of the principal of, or any
    installment of principal of or interest on, any Security, or reduce the
    principal amount thereof or the rate of interest thereon (or the amount of
    any installment of interest thereon) or change the method of calculating
    such rate or reduce any premium payable upon the redemption thereof, or
    reduce the amount of the principal of a Discount Security that would be due
    and payable upon a declaration of acceleration of the Maturity thereof
    pursuant to Section 802, or change the coin or currency (or other
    property), in which any Security or any premium or the interest thereon is
    payable, or impair the right to institute suit for the enforcement of any
    such payment on or after the Stated Maturity of any Security (or, in the
    case of redemption, on or after the Redemption Date), without, in any such
    case, the consent of the Holder of such Security, or

         (b)  reduce the percentage in principal amount of the Outstanding
    Securities of any series or any Tranche thereof, the consent of the Holders
    of which is required for any such supplemental indenture, or the consent of
    the Holders of which is required for any waiver of compliance with any
    provision of this Indenture or of any default hereunder and its
    consequences, or reduce the requirements of Section 1304 for quorum or
    voting, without, in any such case, the consent of the Holders of each
    Outstanding Security of such series or Tranche, or


                                         -67-
<PAGE>

         (c)  modify any of the provisions of this Section, Section 607 or
    Section 813 with respect to the Securities of any series, or any Tranche
    thereof, or except to increase the percentages in principal amount referred
    to in this Section or such other Sections or to provide that other
    provisions of this Indenture cannot be modified or waived without the
    consent of the Holder of each Outstanding Security affected thereby;
    provided, however, that this clause shall not be deemed to require the
    consent of any Holder with respect to changes in the references to "the
    Trustee" and concomitant changes in this Section, or the deletion of this
    proviso, in accordance with the requirements of clause (b) of Section 911
    and clause (h) of Section 1201.

    A supplemental indenture which changes or eliminates any covenant or other
provision of this Indenture which has expressly been included solely for the
benefit of one or more particular series of Securities, or of one or more
Tranches thereof, or which modifies the rights of the Holders of Securities of
such series or Tranches with respect to such covenant or other provision, shall
be deemed not to affect the rights under this Indenture of the Holders of
Securities of any other series or Tranche.

    It shall not be necessary for any Act of Holders under this Section to
approve the particular form of any proposed supplemental indenture, but it shall
be sufficient if such Act shall approve the substance thereof.  A waiver by a
Holder of such Holder's right to consent under this Section shall be deemed to
be a consent of such Holder.

SECTION 1203. EXECUTION OF SUPPLEMENTAL INDENTURES.

    In executing, or accepting the additional trusts created by, any
supplemental indenture permitted by this Article or the modifications thereby of
the trusts created by this Indenture, the Trustee shall be entitled to receive,
and (subject to Section 901) shall be fully protected in relying upon, an
Opinion of Counsel stating that the execution of such supplemental indenture is
authorized or permitted by this Indenture.  The Trustee may, but shall not be
obligated to, enter into any such supplemental indenture which affects the
Trustee's own rights, duties, immunities or liabilities under this Indenture or
otherwise.

SECTION 1204. EFFECT OF SUPPLEMENTAL INDENTURES.

    Upon the execution of any supplemental indenture under this Article this
Indenture shall be modified in accordance therewith, and such supplemental
indenture shall form a part of this Indenture for all purposes; and every Holder
of Securities theretofore or thereafter authenticated and delivered hereunder
shall be bound thereby.  Any supplemental indenture permitted by this Article
may restate this Indenture in its entirety, and, upon the execution and delivery
thereof, any


                                         -68-
<PAGE>


such restatement shall supersede this Indenture as theretofore in effect for all
purposes.

SECTION 1205. CONFORMITY WITH TRUST INDENTURE ACT.

    Every supplemental indenture executed pursuant to this Article shall
conform to the requirements of the Trust Indenture Act as then in effect.

SECTION 1206. REFERENCE IN SECURITIES TO SUPPLEMENTAL INDENTURES.

    Securities of any series, or any Tranche thereof, authenticated and
delivered after the execution of any supplemental indenture pursuant to this
Article may, and shall if required by the Trustee, bear a notation in form
approved by the Trustee as to any matter provided for in such supplemental
indenture.  If the Company shall so determine, new Securities of any series, or
any Tranche thereof, so modified as to conform, in the opinion of the Trustee
and the Company, to any such supplemental indenture may be prepared and executed
by the Company and authenticated and delivered by the Trustee in exchange for
Outstanding Securities of such series or Tranche.

SECTION 1207. MODIFICATION WITHOUT SUPPLEMENTAL INDENTURE.

    If the terms of any particular series of Securities shall have been
established in a Board Resolution or an Officer's Certificate pursuant to a
Board Resolution as contemplated by Section 301, and  not in an indenture
supplemental hereto, additions to, changes in or the elimination of any of such
terms may be effected by means of a supplemental Board Resolution or Officer's
Certificate, as the case may be, delivered to, and accepted by, the Trustee;
provided, however, that such supplemental Board Resolution or Officer's
Certificate shall not be accepted by the Trustee or otherwise be effective
unless all conditions set forth in this Indenture which would be required to be
satisfied if such additions, changes or elimination were contained in a
supplemental indenture shall have been appropriately satisfied.  Upon the
acceptance thereof by the Trustee, any such supplemental Board Resolution or
Officer's Certificate shall be deemed to be a "supplemental indenture" for
purposes of Section 1204 and 1206.

                                   ARTICLE THIRTEEN

                     MEETINGS OF HOLDERS; ACTION WITHOUT MEETING

SECTION 1301. PURPOSES FOR WHICH MEETINGS MAY BE CALLED.

    A meeting of Holders of Securities of one or more, or all, series, or any
Tranche or Tranches thereof, may be called at any time and from time to time 


                                         -69-
<PAGE>

pursuant to this Article to make, give or take any request, demand,
authorization, direction, notice, consent, waiver or other action provided by
this Indenture to be made, given or taken by Holders of Securities of such
series or Tranches.

SECTION 1302. CALL, NOTICE AND PLACE OF MEETINGS.

         (a)  The Trustee may at any time call a meeting of Holders of
    Securities of one or more, or all, series, or any Tranche or Tranches
    thereof, for any purpose specified in Section 1301, to be held at such time
    and at such place in the Borough of Manhattan, The City of New York, as the
    Trustee shall determine, or, with the approval of the Company, at any other
    place.  Notice of every such meeting, setting forth the time and the place
    of such meeting and in general terms the action proposed to be taken at
    such meeting, shall be given, in the manner provided in Section 106, not
    less than 21 nor more than 180 days prior to the date fixed for the
    meeting.

         (b)  If the Trustee shall have been requested to call a meeting of the
    Holders of Securities of one or more, or all, series, or any Tranche or
    Tranches thereof, by the Company or by the Holders of 33% in aggregate
    principal amount of all of such series and Tranches, considered as one
    class, for any purpose specified in Section 1301, by written request
    setting forth in reasonable detail the action proposed to be taken at the
    meeting, and the Trustee shall not have given the notice of such meeting
    within 21 days after receipt of such request or shall not thereafter
    proceed to cause the meeting to be held as provided herein, then the
    Company or the Holders of Securities of such series and Tranches in the
    amount above specified, as the case may be, may determine the time and the
    place in the Borough of Manhattan, The City of New York, or in such other
    place as shall be determined or approved by the Company, for such meeting
    and may call such meeting for such purposes by giving notice thereof as
    provided in clause (a) of this Section.

         (c)  Any meeting of Holders of Securities of one or more, or all,
    series, or any Tranche or Tranches thereof, shall be valid without notice
    if the Holders of all Outstanding Securities of such series or Tranches are
    present in person or by proxy and if representatives of the Company and the
    Trustee are present, or if notice is waived in writing before or after the
    meeting by the Holders of all Outstanding Securities of such series, or by
    such of them as are not present at the meeting in person or by proxy, and
    by the Company and the Trustee.

SECTION 1303. PERSONS ENTITLED TO VOTE AT MEETINGS.

    To be entitled to vote at any meeting of Holders of Securities of one or
more, or all, series, or any Tranche or Tranches thereof, a Person shall be (a)
a Holder of


                                         -70-
<PAGE>

one or more Outstanding Securities of such series or Tranches, or (b) a Person
appointed by an instrument in writing as proxy for a Holder or Holders of one or
more Outstanding Securities of such series or Tranches by such Holder or
Holders.  The only Persons who shall be entitled to attend any meeting of
Holders of Securities of any series or Tranche shall be the Persons entitled to
vote at such meeting and their counsel, any representatives of the Trustee and
its counsel and any representatives of the Company and its counsel.

SECTION 1304. QUORUM; ACTION.

    The Persons entitled to vote a majority in aggregate principal amount of
the Outstanding Securities of the series and Tranches with respect to which a
meeting shall have been called as hereinbefore provided, considered as one
class, shall constitute a quorum for a meeting of Holders of Securities of such
series and Tranches; provided, however, that if any action is to be taken at
such meeting which this Indenture expressly provides may be taken by the Holders
of a specified percentage, which is less than a majority, in principal amount of
the Outstanding Securities of such series and Tranches, considered as one class,
the Persons entitled to vote such specified percentage in principal amount of
the Outstanding Securities of such series and Tranches, considered as one class,
shall constitute a quorum.  In the absence of a quorum within one hour of the
time appointed for any such meeting, the meeting shall, if convened at the
request of Holders of Securities of such series and Tranches, be dissolved.  In
any other case the meeting may be adjourned for such period as may be determined
by the chairman of the meeting prior to the adjournment of such meeting.  In the
absence of a quorum at any such adjourned meeting, such adjourned meeting may be
further adjourned for such period as may be determined by the chairman of the
meeting prior to the adjournment of such adjourned meeting.  Except as provided
by clause (e) of Section 1305, notice of the reconvening of any meeting
adjourned for more than 30 days shall be given as provided in clause (a) of
Section 1302 not less than ten days prior to the date on which the meeting is
scheduled to be reconvened.  Notice of the reconvening of an adjourned meeting
shall state expressly the percentage, as provided above, of the principal amount
of the Outstanding Securities of such series and Tranches which shall constitute
a quorum.

    Except as limited by Section 1202, any resolution presented to a meeting or
adjourned meeting duly reconvened at which a quorum is present as aforesaid may
be adopted only by the affirmative vote of the Holders of a majority in
aggregate principal amount of the Outstanding Securities of the series and
Tranches with respect to which such meeting shall have been called, considered
as one class; provided, however, that, except as so limited, any resolution with
respect to any action which this Indenture expressly provides may be taken by
the Holders of a specified percentage, which is less than a majority, in
principal amount of the Outstanding Securities of such series and Tranches,
considered as one class, may be


                                         -71-
<PAGE>

adopted at a meeting or an adjourned meeting duly reconvened and at which a
quorum is present as aforesaid by the affirmative vote of the Holders of such
specified percentage in principal amount of the Outstanding Securities of such
series and Tranches, considered as one class.

    Any resolution passed or decision taken at any meeting of Holders of
Securities duly held in accordance with this Section shall be binding on all the
Holders of Securities of the series and Tranches with respect to which such
meeting shall have been held, whether or not present or represented at the
meeting.

SECTION 1305. ATTENDANCE AT MEETINGS; DETERMINATION OF VOTING RIGHTS; CONDUCT
              AND ADJOURNMENT OF MEETINGS.

              (a)  Attendance at meetings of Holders of Securities may be in
    person or by proxy; and, to the extent permitted by law, any such proxy
    shall remain in effect and be binding upon any future Holder of the
    Securities with respect to which it was given unless and until specifically
    revoked by the Holder or future Holder of such Securities before being
    voted.

              (b)  Notwithstanding any other provisions of this Indenture, the
    Trustee may make such reasonable regulations as it may deem advisable for
    any meeting of Holders of Securities in regard to proof of the holding of
    such Securities and of the appointment of proxies and in regard to the
    appointment and duties of inspectors of votes, the submission and
    examination of proxies, certificates and other evidence of the right to
    vote, and such other matters concerning the conduct of the meeting as it
    shall deem appropriate.  Except as otherwise permitted or required by any
    such regulations, the holding of Securities shall be proved in the manner
    specified in Section 104 and the appointment of any proxy shall be proved
    in the manner specified in Section 104.  Such regulations may provide that
    written instruments appointing proxies, regular on their face, may be
    presumed valid and genuine without the proof specified in Section 104 or
    other proof.

              (c)  The Trustee shall, by an instrument in writing, appoint a
    temporary chairman of the meeting, unless the meeting shall have been
    called by the Company or by Holders as provided in clause (b) of Section
    1302, in which case the Company or the Holders of Securities of the series
    and Tranches calling the meeting, as the case may be, shall in like manner
    appoint a temporary chairman.  A permanent chairman and a permanent
    secretary of the meeting shall be elected by vote of the Persons entitled
    to vote a majority in aggregate principal amount of the Outstanding
    Securities of all series and Tranches represented at the meeting,
    considered as one class.


                                         -72-
<PAGE>

         (d)  At any meeting each Holder or proxy shall be entitled to one vote
    for each $1 principal amount of Securities held or represented by him;
    provided, however, that no vote shall be cast or counted at any meeting in
    respect of any Security challenged as not Outstanding and ruled by the
    chairman of the meeting to be not Outstanding.  The chairman of the meeting
    shall have no right to vote, except as a Holder of a Security or proxy.

         (e)  Any meeting duly called pursuant to Section 1302 at which a
    quorum is present may be adjourned from time to time by Persons entitled to
    vote a majority in aggregate principal amount of the Outstanding Securities
    of all series and Tranches represented at the meeting, considered as one
    class; and the meeting may be held as so adjourned without further notice.

SECTION 1306. COUNTING VOTES AND RECORDING ACTION OF MEETINGS.

    The vote upon any resolution submitted to any meeting of Holders shall be
by written ballots on which shall be subscribed the signatures of the Holders or
of their representatives by proxy and the principal amounts and serial numbers
of the Outstanding Securities, of the series and Tranches with respect to which
the meeting shall have been called, held or represented by them.  The permanent
chairman of the meeting shall appoint two inspectors of votes who shall count
all votes cast at the meeting for or against any resolution and who shall make
and file with the secretary of the meeting their verified written reports of all
votes cast at the meeting.  A record of the proceedings of each meeting of
Holders shall be prepared by the secretary of the meeting and there shall be
attached to said record the original reports of the inspectors of votes on any
vote by ballot taken thereat and affidavits by one or more persons having
knowledge of the facts setting forth a copy of the notice of the meeting and
showing that said notice was given as provided in Section 1302 and, if
applicable, Section 1304.  Each copy shall be signed and verified by the
affidavits of the permanent chairman and secretary of the meeting and one such
copy shall be delivered to the Company, and another to the Trustee to be
preserved by the Trustee, the latter to have attached thereto the ballots voted
at the meeting.  Any record so signed and verified shall be conclusive evidence
of the matters therein stated.

SECTION 1307. ACTION WITHOUT MEETING.

    In lieu of a vote of Holders at a meeting as hereinbefore contemplated in
this Article, any request, demand, authorization, direction, notice, consent,
waiver or other action may be made, given or taken by Holders by written
instruments as provided in Section 104.


                                         -73-
<PAGE>

                                   ARTICLE FOURTEEN
                                           
           IMMUNITY OF INCORPORATORS, STOCKHOLDERS, OFFICERS AND DIRECTORS
                                           
SECTION 1401. LIABILITY SOLELY CORPORATE.

    No recourse shall be had for the payment of the principal of or premium, if
any, or interest, if any, on any Securities, or any part thereof, or for any
claim based thereon or otherwise in respect thereof, or of the indebtedness
represented thereby, or upon any obligation, covenant or agreement under this
Indenture, against any incorporator, stockholder, officer or director, as such,
past, present or future of the Company or of any predecessor or successor
corporation (either directly or through the Company or a predecessor or
successor corporation), whether by virtue of any constitutional provision,
statute or rule of law, or by the enforcement of any assessment or penalty or
otherwise; it being expressly agreed and understood that this Indenture and all
the Securities are solely corporate obligations, and that no personal liability
whatsoever shall attach to, or be incurred by, any incorporator, stockholder,
officer or director, past, present or future, of the Company or of any
predecessor or successor corporation, either directly or indirectly through the
Company or any predecessor or successor corporation, because of the indebtedness
hereby authorized or under or by reason of any of the obligations, covenants or
agreements contained in this Indenture or in any of the Securities or to be
implied herefrom or therefrom, and that any such personal liability is hereby
expressly waived and released as a condition of, and as part of the
consideration for, the execution of this Indenture and the issuance of the
Securities.

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

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



                                         -74-
<PAGE>

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

                        OTTER TAIL POWER COMPANY


                        By:   /s/ A.E. Anderson
                            -------------------------------------
                            Vice President, Finance and Treasurer
[OTTER TAIL POWER
COMPANY SEAL]

ATTEST:


  /s/ Penny Mosher
- -------------------------


                        FIRST TRUST NATIONAL ASSOCIATION,
                        TRUSTEE


                        By:   /s/ David H. Bluhm
                            -------------------------------------
                            Vice President
[FIRST TRUST NATIONAL
ASSOCIATION SEAL]

ATTEST:


  /s/ L.L. Casey
- -------------------------





                                         -75-
<PAGE>


STATE OF MINNESOTA      )
                        ) ss.
COUNTY OF OTTER TAIL    )


    On the 10th day of November, 1997, before me personally came Andrew E.
Anderson, to me known, who, being by me duly sworn, did depose and say that he
is the Vice President, Finance and Treasurer of Otter Tail Power Company, the
corporation described in and which executed the foregoing instrument; that he
knows the seal of said corporation, that the seal affixed to said instrument is
such corporate seal; that it was so affixed by authority of the Board of
Directors of said corporation, and that he signed his name thereto by like
authority, acknowledging the instrument to be the free act and deed of said
corporation.

                              /s/ Susan K. Vukonich
                            -------------------------------------
                             Notary Public

                                                                 [Notarial Seal]


STATE OF MINNESOTA )
                   )ss.
COUNTY OF RAMSEY   )


    On the 13th day of November, 1997, before me personally came David H.
Bluhm, to me known, who, being by me duly sworn, did depose and say that he is a
Vice President of First Trust National Association, the national banking
association described in and which executed the foregoing instrument; that he
knows the seal of said national banking association; that the seal affixed to
said instrument is the seal of said national banking association; that it was so
affixed by authority of the Board of Directors of said national banking
association, and that he signed his name thereto by like authority,
acknowledging the instrument to be the free act and deed of said national
banking association.

                              /s/ Terri L. Cramer
                            -------------------------------------
                             Notary Public

                                                                 [Notarial Seal]



                                         -76-


<PAGE>

                                                                  EXHIBIT 4-D-12

                               OTTER TAIL POWER COMPANY

                    Officer's Certificate and Authentication Order


         Pursuant to the Indenture (For Unsecured Debt Securities) dated as of 
November 1, 1997 (the "Indenture") between OTTER TAIL POWER COMPANY (the
"Company") and First Trust National Association, as trustee (the "Trustee"), and
resolutions adopted by the Board of Directors of the Company and the Pricing
Committee of the Board of Directors of the Company on July 15, 1996 and November
18, 1997, respectively, this Officer's Certificate and Authentication Order is
being delivered to the Trustee to establish the terms of a series of Securities
in accordance with Section 301 of the Indenture, to establish the form of the
Securities of such series in accordance with Section 201 of the Indenture, to
request the authentication and delivery of the Securities of such series
pursuant to Section 303 of the Indenture and to comply with the provisions of
Section 102 of the Indenture.

         Capitalized terms used but not defined herein and defined in the
Indenture shall have the respective meanings ascribed to them in the Indenture.

         A.   ESTABLISHMENT OF SERIES PURSUANT TO SECTION 301 OF THE INDENTURE. 
There is hereby established, pursuant to Section 301 of the Indenture, a series
of Securities which shall have the following terms (the lettered clauses set
forth below correspond to the lettered subsections of Section 301 of the
Indenture):

         (a)  The series of Securities hereby being authorized shall bear the
    title "Senior Debentures, 6.375% Series Due 2007" (referred to herein as
    the "Debentures").

         (b)  The aggregate principal amount of Debentures which may be
    authenticated and delivered under the Indenture (except for Debentures
    authenticated and delivered upon registration of transfer of, or in
    exchange for, or in lieu of, other Debentures pursuant to Section 304, 305,
    306, 406 or 1206 thereof and, except for any Debentures which, pursuant to
    Section 303 thereof, are deemed never to have been authenticated and
    delivered thereunder) shall be limited to $50,000,000.

         (c)  Each installment of interest on a Debenture shall be payable to
    the Person in whose name such Debenture is registered at the close of
    business on the Regular Record Date for such interest, which shall be the
    May 15 and November 15 (whether or not a Business Day), as the case may be,
    next preceding the relevant Interest Payment Date for the Debentures.  Any
    installment of interest on a Debenture not punctually paid or duly provided
    for shall forthwith cease to be payable to the Holder on such Regular
    Record 


<PAGE>

    Date, and may either be paid to the Person in whose name the Debenture is
    registered at the close of business on a Special Record Date for the
    payment of such Defaulted Interest to be fixed by the Trustee, notice
    whereof shall be given to the Holders of the Debentures not less than 10
    days prior to such Special Record Date, or be paid at any time in any other
    lawful manner not inconsistent with the requirements of any securities
    exchange on which the Debentures may be listed, or any book-entry system
    which may be applicable to the Debentures and upon such notice as may be
    required by such exchange or system, all as more fully provided in the
    Indenture.  

         (d)  The Debentures shall mature and the principal thereof shall be
    due and payable on December 1, 2007, together with all accrued and unpaid
    interest thereon to, but not including, such date.

         (e)  The Debentures shall bear interest from the date of original
    issuance (which is anticipated to be November 21, 1997) at the rate of
    6.375% per annum payable semi-annually in arrears on June 1 and December 1
    of each year commencing June 1, 1998.  The amount of interest payable for
    any such period will be computed on the basis of a 360-day year consisting
    of twelve 30-day months and on the basis of the actual number of days
    elapsed within any month in relation to the deemed 30 days of such month. 
    Interest on the Debentures will accrue from the date of original issuance
    or from the most recent Interest Payment Date to which interest has been
    paid or provided for.  In the event that any Interest Payment Date is not a
    Business Day, then payment of interest payable on such date will be made on
    the next succeeding day which is a Business Day (and without any interest
    or other payment in respect of such delay), except that, if such Business
    Day is in the next succeeding calendar year, such payment shall be made on
    the immediately preceding Business Day, in each case with the same force
    and effect as if made on such Interest Payment Date.

         (f)  The principal of and each installment of interest on each
    Debenture that is not a global Security shall be payable, and registration
    of transfer and exchanges of such Debentures may be effected, at the
    corporate trust office of the Trustee in New York, New York; provided,
    however, that interest shall be paid, at the option of the Company, either
    (i) by check mailed to the address of the Person entitled thereto as such
    address shall appear in the Security Register or (ii) by wire transfer in
    immediately available funds at such place and to such account as may be
    designated by the Person entitled thereto as specified in the Security
    Register.  Payment of principal of and interest on each Debenture
    represented by a global Security shall be made in immediately available
    funds to The Depository Trust Company ("DTC") or its nominee, as the case
    may be, as the sole registered owner and the sole Holder of the Debentures
    represented thereby for all purposes under the Indenture.  


                                          2

<PAGE>

    Notices and demands to or upon the Company with respect to the Debentures
    and the Indenture may be served at the Corporate Trust Office of the
    Trustee or at the Company at the address of its principal office specified
    in the Indenture.  The Trustee will initially be the Paying Agent and the
    Security Registrar for the Debentures.

         (g)  The Debentures shall not be redeemable at the option of the
    Company prior to their Stated Maturity.

         (h)  There are no sinking fund or mandatory redemption provisions
    applicable to the Debentures, and the Company will not be subject to any
    obligation to redeem or repurchase the Debentures at the option of a
    Holder.

         (r)  The Debentures will be originally issued in global form
    registered in the name of DTC or its nominee and will, unless and until the
    Debentures are exchanged in whole or in part for certificated Debentures
    registered in the names of various beneficial holders thereof, contain
    restrictions on transfer, substantially as described in the form of
    Debentures, attached hereto as Exhibit A.  A global Debenture shall be
    exchangeable for certificated Debentures registered in the names of persons
    other than DTC or its nominee only if (i) DTC notifies the Company that it
    is unwilling or unable to continue as a depositary for such global
    Debenture and no successor depositary shall have been appointed, or if at
    any time DTC ceases to be a clearing agency registered under the Securities
    Exchange Act of 1934, as amended, at a time when DTC is required to be so
    registered to act as such depositary, (ii) the Company in its sole
    discretion determines that such global Debenture shall be so exchangeable
    or (iii) there shall have occurred and be continuing an Event of Default
    with respect to the Debentures.  Any global Debenture that is exchangeable
    pursuant to the preceding sentence shall be exchangeable for certificated
    Debentures registered in such names as DTC shall direct.

         (v)  The Debentures shall have such other terms and provisions as are
    provided in the form set forth in Exhibit A hereto.

         B.   ESTABLISHMENT OF FORM OF DEBENTURE PURSUANT TO SECTION 201 OF THE
INDENTURE.  It is hereby established pursuant to Section 201 of the Indenture
that the Debentures shall be substantially in the form attached as Exhibit A
hereto.

         C.   ORDER FOR THE AUTHENTICATION AND DELIVERY OF DEBT SECURITIES
PURSUANT TO SECTION 303 OF THE INDENTURE.  It is hereby ordered pursuant to
Section303 of the Indenture that the Trustee authenticate, in the manner
provided by the Indenture, one Debenture in the aggregate principal amount of
$50,000,000 registered in the name of Cede & Co., which Debenture has been
heretofore duly 


                                          3

<PAGE>

executed by the proper officers of the Company and delivered to you as provided
in the Indenture, and to deliver said authenticated Debenture to or upon the
order of A.G. Edwards & Sons, Inc. on November 21, 1997.

         The undersigned has read the pertinent sections of the Indenture
including the related definitions contained therein.  The undersigned has
examined the resolutions adopted by the Board of Directors of the Company and
the Pricing Committee of the Board of Directors of the Company on July 15, 1996
and November 18, 1997, respectively.  In the opinion of the undersigned, the
undersigned has made such examination or investigation as is necessary to enable
the undersigned to express an informed opinion as to whether or not the
conditions precedent to (i) the establishment of a series of Securities pursuant
to Section 301 of the Indenture, (ii) the establishment of forms of such
Securities pursuant to Section 201 of the Indenture and (iii) the authentication
of such series of Securities pursuant to Section 303 of the Indenture have been
complied with.  In the opinion of the undersigned, such conditions have been
complied with.

Dated:  November 18, 1997.

                                  OTTER TAIL POWER COMPANY



                                  By    /s/ Andrew E. Anderson
                                    ------------------------------
                                       Andrew E. Anderson
                                       Vice President, Finance
                                         and Treasurer


<PAGE>

                                                                       EXHIBIT A

         [If the Debentures are to be issued in book-entry form, insert the
following legend -- UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED
REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"),
TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT,
AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH
OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY
PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN
AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR
VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED
OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.]

                               OTTER TAIL POWER COMPANY

                       Senior Debenture, 6.375% Series Due 2007

                                       NO. R-_
                                                           $___________
                                                 USIP NO. 689648AL7



         OTTER TAIL POWER COMPANY, a corporation duly organized and existing
under the laws of Minnesota (herein called the "Company," which term includes
any successor Person under the Indenture referred to below), for value received,
hereby promises to pay to __________, or registered assigns, the principal sum
of ____________________________ United States Dollars ($___________) on December
1, 2007, and to pay interest thereon from November 21, 1997, or from the most
recent Interest Payment Date to which interest has been paid or duly provided
for, semi-annually in arrears on June 1 and
December 1 of each year, commencing on June 1, 1998, at the rate of 6.375% per
annum, to, but not including, the date on which the principal hereof is paid or
made available for payment.  The amount of interest payable for any period will
be computed on the basis of twelve, 30-day months and a 360-day year.  The
interest so payable, and punctually paid or duly provided for, on any Interest
Payment Date will, as provided in such Indenture, be paid to the Person in whose
name this Debenture (or one or more Predecessor Securities) is registered at the
close of business on the Regular Record Date for such interest, which shall be
the May 15 and November 15 (whether or not a Business Day), as the case may be,
next preceding such Interest Payment Date.  Any such interest not so punctually
paid or duly provided for shall forthwith cease to be payable to the registered
Holder on such Regular Record Date and may either be paid to the Person in whose
name this Debenture (or one or more Predecessor Securities) is registered at the
close of business on a Special Record Date for the payment of such Defaulted
Interest to be fixed by the Trustee, notice of which shall be given to Holders
of Debentures of this series not less than 10 days prior to such Special Record
Date, or be paid at any time in any other lawful manner not inconsistent with
the requirements of any securities exchange on which this Debenture may be
listed, or any book-entry system which may be applicable to this Debenture, and
upon such notice as may be required by such exchange or system, all as more
fully provided in said Indenture.

         Payment of the principal of and interest on any Debenture (that is not
a global Debenture) will be made at the corporate trust office of the Trustee in
New York, New York; provided, however, that interest shall be paid, at the
option of the Company, either (i) by check mailed to the address of the Person
entitled thereto as such address shall appear in the Security Register or (ii)
by wire transfer in immediately available funds at such place and to such
account as may be designated by the Person entitled thereto as specified in the
Security Register.  Payment of principal of and interest on any Global Debenture
will be made in immediately available funds to DTC or its nominee, as the case
may


<PAGE>

be, as the sole registered owner and the sole Holder of the global Debenture for
all purposes under the Indenture.   Payment of the principal of and interest on
this Debenture will be made in such coin or currency of the United States of
America as at the time of payment is legal tender for payment of public and
private debts.

         Additional provisions at this Debenture are continued below and such
provisions have the same effect as though fully if set forth in this place.

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

<PAGE>

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

Dated:     _________________                OTTER TAIL POWER COMPANY



[SEAL]                                      By
                                               Title:

Attest:

- ----------------------------------------
Title:












                       TRUSTEE'S CERTIFICATE OF AUTHENTICATION


    This is one of the Debentures of the series designated herein referred to
in the within mentioned Indenture.


                                            FIRST TRUST NATIONAL
                                                 ASSOCIATION, Trustee


                                            By
                                               Authorized Signatory

<PAGE>


                               OTTER TAIL POWER COMPANY

                      Senior Debentures, 6.375% Series Due 2007



         This Debenture is one of a duly authorized issue of Securities of the
Company (such issue of Securities being herein called the "Debentures") issued
under an Indenture (For Unsecured Debt Securities) dated as of November 1, 1997
(herein called the "Indenture") between First Trust National Association, as
Trustee (herein called the "Trustee," which term includes any successor trustee
under the Indenture), to which Indenture and Officer's Certificate and
Authentication Order filed with the Trustee on November 21, 1997 creating the
series designated herein reference is hereby made for a statement of the
respective rights, limitations of rights, duties and immunities thereunder of
the Company, the Trustee and the Holders of the Debentures and of the terms upon
which the Debentures are, and are to be, authenticated and delivered.

         The Debentures are not subject to redemption.

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

         The Indenture contains provisions for satisfaction and discharge at
any time of the entire indebtedness of this Debenture upon compliance by the
Company with certain conditions set forth in the Indenture.

         The Indenture contains provisions permitting the Company and the
Trustee, with the consent of Holders of not less than a majority in principal
amount of the Securities of all series then Outstanding under the Indenture
(including the Debentures), considered as one class, to modify the Indenture in
a manner affecting the rights of the Holders of the Debentures; PROVIDED, that
no such modification may, without the consent of the Holder of each Outstanding
Debenture, (i) change the Stated Maturity of the principal of, or any
installment of principal of or interest on, any Debenture, or reduce the
principal amount thereof or the rate of interest thereon (or the amount of any
installment of interest thereon) or change the method of calculating such rate
or reduce any premium payable upon the redemption thereof, or change the coin or
currency (or other property), in which the Debentures or any premium or the
interest thereon is payable, or impair the right to institute suit for the
enforcement of any such payment on or after the Stated Maturity of any Debenture
or (ii) reduce the percentage in principal amount of the Outstanding Debentures,
the consent of the Holders of which is required for any such modification, or
the consent of the Holders of which is required for any waiver of compliance
with any provision of the Indenture or of any default thereunder and its
consequences, or reduce the requirements of the Indenture for quorum or voting.
The Indenture also contains provisions permitting Holders of a majority in
principal amount of the Debentures at the time Outstanding, on behalf of the
Holders of all Debentures, to waive compliance by the Company with certain
provisions of the Indenture and certain past defaults under the Indenture and
their consequences.  Any such consent or waiver by the Holder of this Debenture
shall be conclusive and binding upon such Holder and upon all future Holders of
this Debenture and of any Debentures issued upon the registration of transfer
hereof or in exchange herefor or in lieu hereof, whether or not notation of such
consent or waiver is made upon this Debenture.

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

<PAGE>

         As set forth in, and subject to, the provisions of the Indenture, no
Holder of any Debenture will have any right to institute any proceeding with
respect to the Indenture or for any remedy thereunder, unless such Holder shall
have previously given to the Trustee written notice of a continuing Event of
Default with respect to the Debentures, the Holders of not less than a majority
in aggregate principal amount of the Outstanding Securities of all series in
respect of which an Event of Default shall have occurred and be continuing,
considered as one class, shall have made written request, and offered reasonable
indemnity, to the Trustee to institute such proceeding as trustee, and the
Trustee shall not have received from the Holders of a majority in aggregate
principal amount of the Outstanding Securities of all series in respect of which
an Event of Default shall have occurred and be continuing, considered as one
class, a direction inconsistent with such request and shall have failed to
institute such proceeding within 60 days; PROVIDED, HOWEVER, that such
limitations do not apply to a suit instituted by the Holder hereof for the
enforcement of payment of the principal of or interest on this Debenture on or
after the respective due dates expressed herein.

         As provided in the Indenture and subject to certain limitations
(including, if this Debenture is a global Debenture, the limitations set forth
above) therein set forth, the transfer of this Debenture is registrable in the
Security Register, upon surrender of this Debenture for registration of transfer
at the office or agency of the Company in the New York, New York maintained for
such purpose, duly endorsed by, or accompanied by a written instrument of
transfer in form satisfactory to the Company and the Security Registrar, duly
executed by the Holder hereof or such Holder's attorney duly authorized in
writing, and thereupon one or more new Debentures, of authorized denominations
and for the same aggregate principal amount, will be issued to the designated
transferee or transferees.  No service charge shall be made for any such
registration of transfer or exchange, but the Company may require payment of a
sum sufficient to cover any tax or other governmental charge payable in
connection therewith.

         Any payment on this Debenture due on any day which is not a Business
Day in New York, New York need not be made on such day, but may be made on the
next succeeding Business Day with the same force and effect as if made on such
due date, and no interest shall accrue for the period from and after such date,
except that, if such Business Day is in the next succeeding calendar year, such
payment shall be made on the immediately preceding Business Day with the same
force and effect as if made on such due date.

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

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

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

         THIS DEBENTURE SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH
THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO CONFLICTS OF LAWS PRINCIPLES
THEREOF.

<PAGE>

                                    ABBREVIATIONS

         The following abbreviations, when used in this instrument, shall be
construed as though they were written out in full according to applicable laws
or regulations.

              TEN COM - as tenants in common

              TEN ENT - as tenants by the entireties

              JT TEN -  as joint tenants with right of
                             survivorship and not as tenants
                             in common

              UNIF GIFT MIN ACT -_______________ Custodian _______________
                                            (Cust)                     (Minor)
                         under Uniform Gifts to Minors Act


                        ------------------------------------------
                                          (State)

                      Additional abbreviations may also be used
                            though not in the above list.


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

<PAGE>

                                      ASSIGNMENT


         FOR VALUE RECEIVED, the undersigned hereby sell(s), assign(s) and
transfer(s) unto
PLEASE INSERT SOCIAL SECURITY OR OTHER
IDENTIFYING NUMBER OF ASSIGNEE

___________________________________
___________________________________





                     (Please Print or Typewrite Name and Address,
                       Including Postal Zip Code, of Assignee)


the within Debenture and all rights thereunder, and hereby irrevocably
constitutes and
appoints


to transfer said Debenture on the books of the Company, with full power of
substitution in the premises.

Dated:___________________________
Signature Guaranteed

__________________________________

_____________________________
                                       NOTICE: The signature to this assignment
                                       must correspond with the name as written
                                       upon the face of the within Debenture in
                                       every particular, without alteration or
                                       enlargement or any change whatsoever and
                                       must be guaranteed by a member of the  
                                       Medallion Signature Program.




<PAGE>

                                                                  EXHIBIT 12-A-1

                               Otter Tail Power Company
                  Calculation of Ratio of Earnings to Fixed Charges

<TABLE>
<CAPTION>


                                                             Year Ended December 31,
                                  -------------------------------------------------------------------------
                                      1992            1993           1994           1995           1996
                                  -------------  -------------  -------------  -------------  -------------

                                                                                               (restated)*
<S>                        <C>    <C>            <C>            <C>            <C>            <C>
Consolidated Net Income    1      $  26,538,112  $  27,369,011  $  28,474,794  $  28,945,442  $  31,003,946
Add:
  Income Taxes             2      $  13,869,964  $  14,044,332  $  15,881,034  $  16,158,557  $  14,040,144
  Interest Charges**       3      $  13,222,271  $  13,880,870  $  13,749,080  $  15,222,444  $  16,964,898

Adjusted Earnings (1+2+3)  4      $  53,630,347  $  55,294,213  $  58,104,908  $  60,326,443  $  62,008,988

Ratio of Earnings to 
  Fixed Charges           (4/3)       4.06            3.98           4.23           3.96           3.66

</TABLE>
 



                                       For the Nine Months
                                       Ended September 30,
                                  ------------------------------
                                       1996            1997
                                  -------------   --------------
                                   (restated)*
Consolidated Net Income     1     $  23,096,520   $  23,867,727
Add:
  Income Taxes              2     $  10,261,694   $  10,953,169
  Interest Charges**        3     $  12,271,209   $  13,932,092

Adjusted Earnings (1+2+3)   4     $  45,629,423   $  48,752,988

Ratio of Earnings to
  Fixed Charges            (4/3)       3.72            3.50




*   Restated to reflect the acquisition of Chassis Liner Corporation on June
    30, 1997, which was accounted for under the pooling of interests method.

**  Equals fixed charges for purposes of this computation for the Registration
    Statement on Form S-3 (File No. 333-11153) filed by the Registrant with the
    Securities and Exchange Committee on August 30, 1996.  Interest charges
    consist of interest on long-term debt, other interest charges and
    amortization of debt expense, premium and discount.



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