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Exhibit 4.4

MINES MANAGEMENT, INC.


and


as Trustee


INDENTURE


Dated as of


Providing for the Issuance of
Debt Securities in Series

RECONCILIATION AND TIE BETWEEN TRUST INDENTURE ACT OF 1939
AND
INDENTURE PROVISIONS*

TABLE OF CONTENTS

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        INDENTURE dated as of                  ,            , between MINES MANAGEMENT, INC. , a corporation duly incorporated and existing under the laws of Idaho (herein called the "Company"), having its registered office at 905 W. Riverside Avenue, Suite 311, Spokane, WA 99201, and                  , as Trustee (herein called the "Trustee"), the office of the Trustee at which at the date hereof its corporate trust business is principally administered being                  .

RECITALS 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 debentures, notes or other evidences of indebtedness (herein called the "Securities"), to be issued in one or more series as in this Indenture provided.

        All things necessary to make this Indenture a valid agreement of the Company, in accordance with its terms, have been done.

        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 1.1     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 other terms used herein 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 principles, 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 of America at the date of such computation;

        (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; and

        (e)   the principal amount of any non-interest bearing or other discount security at any date shall be the principal amount thereof that would be shown on a balance sheet of the issuer dated such date prepared in accordance with generally accepted accounting principles.

        Certain terms, used principally within an Article of this Indenture, may be defined in that Article.

        "Act," when used with respect to any Holder, has the meaning specified in Section 1.4.

        "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 indirectly, 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 authorized by the Trustee pursuant to Section 7.15 to act on behalf of the Trustee to authenticate Securities of one or more series.

        "Authorized Newspaper" means a newspaper of general circulation in the place of publication, printed in the official language of the country of publication and customarily published on each Business Day, whether or not published on Saturdays, Sundays or holidays. Whenever successive weekly publications in an Authorized Newspaper are authorized or required hereunder, they may be made (unless otherwise expressly provided herein) on the same or different days of the week and in the same or different Authorized Newspapers.

        "Bearer Security" means any Security which is not registered in the Security Register as to both principal and interest (including without limitation any Security in temporary or definitive global bearer form).

        "Board of Directors" means either the board of directors of the Company, any executive officer of the Company duly authorized to act in the name of or on behalf of such board of directors or any committee consisting of two or more persons, who need not be directors, duly authorized to act in the name of or on behalf of such board.

        "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.

        "Business Day," when used with respect to any Place of Payment or place of publication, means each day on which commercial banks and foreign exchange markets settle payments in the Place of Payment or place of publication, or as specified for a series of Securities pursuant to Section 2.2 or Section 3.1, as the case may be. Unless otherwise specified pursuant to Section 2.2 or Section 3.1, as the case may be, when used with respect to Securities bearing interest at a rate or rates determined by reference to London interbank offered rates for deposits in U.S. Dollars, "Business Day" shall exclude any day on which commercial banks and foreign exchange markets do not settle payments in London.

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

        "Company" means the Person named as the "Company" in the first paragraph of this instrument 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," "Request of the Company," "Company Order" or "Order of the Company" means a written request or order signed in the name of the Company by its Chairman of the Board, its Chief Executive Officer, its Chief Operating Officer, President, a Vice President or any person acting in a similar capacity, and by its Treasurer, an Assistant Treasurer, its Controller, an Assistant Controller, its Chief Financial Officer, its Chief Accounting Officer, Secretary, an Assistant Secretary or any person acting in a similar capacity, and delivered to the Trustee.

        "Component Currency" has the meaning specified in Section 4.10(i).

        "Conversion Date" has the meaning specified in Section 4.10(e).

        "Conversion Rate" has the meaning specified in Section 7.14.

        "Corporate Trust Office" means the principal office of the Trustee in                  , at which at any particular time its corporate trust business shall be principally administered, which office at the date hereof is                  , except that with respect to the presentation of Securities (or Coupons, if any, representing an installment of interest) for payment or for registration of transfer and exchange, such

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term shall mean the office or the agency of the Trustee in said city at which at any particular time its corporate agency business shall be conducted.

        "Corporation" includes corporations, associations, companies, limited liability companies, partnerships and business trusts.

        "Coupon" or "coupon" means any interest coupon appertaining to a Bearer Security.

        "Defaulted Interest" has the meaning specified in Section 4.6.

        "Depositary" means, unless otherwise specified by the Company pursuant to either Section 2.2 or 3.1, with respect to Securities of any series issuable or issued as a Global Security,                  or any successor thereto registered as a clearing agency under the Exchange Act or other applicable statute or regulation.

        "Discharged" has the meaning specified in Section 5.5.

        "Dollar," "U.S. Dollar" or "$" means the coin or currency of the United States of America as at the time of payment is legal tender for the payment of public and private debts.

        "Dollar Equivalent of the Currency Unit" has the meaning specified in Section 4.10(h).

        "Dollar Equivalent of the Foreign Currency" has the meaning specified in Section 4.10(g).

        "ECU" means the European Currency Unit as defined and revised from time to time by the Council of the European Communities.

        "Euroclear" means the operator of the Euroclear System.

        "European Communities" means the European Economic Community, the European Coal and Steel Community and the European Atomic Energy Community.

        "Event of Default" has the meaning specified in Section 6.1.

        "Exchange Act" means the Securities Exchange Act of 1934, as amended.

        "Exchange Rate Agent" means the entity appointed by the Company pursuant to Section 1.4(g). Unless otherwise specified as contemplated by Section 2.2 or Section 3.1, as the case may be, the Luxembourg Stock Exchange shall act as Exchange Rate Agent for purposes of Section 4.10 in the case of each series of Securities listed on the Luxembourg Stock Exchange.

        "Exchange Rate Officers' Certificate" means a telecopy or tested telex or a certificate setting forth (1) the applicable Official Currency Unit Exchange Rate and (2) the Dollar or Foreign Currency or currency unit amounts of principal, premium, if any, and interest, if any, respectively (on an aggregate basis and on the basis of a Security having a principal amount of 1,000 units in the relevant currency or currency unit), payable on the basis of such Official Currency Unit Exchange Rate, sent (in the case of a telecopy or telex) or executed (in the case of a certificate) by the Chairman, Controller or any Assistant Controller or by the Treasurer or any Assistant Treasurer of the Company or any person acting in a similar capacity and delivered to the Trustee; such telecopy, tested telex or certificate need not comply with Section 1.2.

        "Foreign Currency" means any currency, including, without limitation, the ECU, issued by the government of one or more countries other than the United States of America or by a recognized confederation or association of such governments.

        "Foreign Government Securities" has the meaning specified in Section 5.5.

        "Funded Debt" means any Indebtedness maturing by its terms more than one year from the date of the issuance thereof, including any Indebtedness renewable or extendible at the option of the obligor to a date later than one year from the date of the original issuance thereof.

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        "Global Security" means with respect to any series of Securities issued hereunder, a Security which is executed by the Company and authenticated and delivered by the Trustee to the Depositary or pursuant to the Depositary's instruction, all in accordance with this Indenture and an indenture supplemental hereto, if any, or Board Resolution and pursuant to a Company Request, which shall be registered in the name of the Depositary or its nominee and which shall represent, and shall be denominated in an amount equal to the aggregate principal amount of all of the Outstanding Securities of such series or any portion thereof, in either case having the same terms, including, without limitation, the same original issue date, date or dates on which principal is due, and interest rate or method of determining interest.

        "Holder" or "holder" means, with respect to a Registered Security, the Person in whose name at the time a particular Registered Security is registered in the Security Register and, with respect to a Bearer Security and/or a Coupon, the bearer thereof.

        "Indebtedness" of any Person means all indebtedness representing money borrowed which is created, assumed, incurred or guaranteed in any manner by such Person or for which such Person is otherwise responsible or liable (whether by agreement to purchase indebtedness of, or to supply funds to or invest in, others).

        "Indenture" means this instrument as originally executed or 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 2.2 and Section 3.1, as the case may be.

        "Interest," when used with respect to an Original Issue Discount Security which by its terms bears interest only after Maturity, means interest payable after Maturity.

        "Interest Payment Date," when used with respect to any Security, means the Stated Maturity of an installment of interest on such Security.

        "Issue Date" means, with respect to any Securities of a series, the date on which such Securities are authenticated and delivered pursuant to this Indenture.

        "Market Exchange Rate" has the meaning specified in Section 4.10(i).

        "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 therein or herein provided, whether at the Stated Maturity or by declaration of acceleration, call for redemption or otherwise.

        "Medium-Term Debt Securities" has the meaning specified in Section 3.1.

        "Medium-Term Debt Securities Certificate" shall mean a certificate signed by the Chairman of the Board, the Chief Executive Officer, the Chief Operating Officer, the President, any Vice President or any person acting in a similar capacity, the Chief Financial Officer, the Chief Accounting Officer, the Treasurer, the Controller, any Secretary or Assistant Treasurer, Assistant Controller or Assistant Secretary of the Company, or any person acting in a similar capacity or any other employee of the Company designated by a Board Resolution as having the authority to deliver a Medium-Term Debt Securities Certificate hereunder.

        "Officers' Certificate" means a certificate signed by the Chairman of the Board, the Chief Executive Officer, the Chief Operating Officer, the President, any Vice President or any person acting in a similar capacity, and by the Chief Financial Officer, the Chief Accounting Officer, the Treasurer, the Controller, the Secretary or any Assistant Treasurer, Assistant Controller, Assistant Secretary or any person acting in a similar capacity, of the Company, and delivered to the Trustee. Each such Officers' Certificate shall contain the statements provided in Section 1.2 if and to the extent required by the provisions of such Section.

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        "Official Currency Unit Exchange Rate" means, with respect to any payment to be made hereunder, the exchange rate between the relevant currency unit and the currency or currency unit of payment calculated by the Exchange Rate Agent for the Securities of the relevant series (in the case of ECU, reported by the Commission of the European Communities and on the date hereof based on the rates in effect at 2:30 p.m., Brussels time, on the exchange markets of the Component Currencies of ECU), on the Business Day (in the city in which such Exchange Rate Agent has its principal office) immediately preceding delivery of any Exchange Rate Officers' Certificate.

        "Opinion of Counsel" means a written opinion of counsel, who may be counsel for or an employee of the Company. Each Opinion of Counsel shall contain the statements provided in Section 1.2 if and to the extent required by the provisions of such Section.

        "Original Issue Discount Security" means (1) 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 6.2, and (2) any other security deemed an Original Issue Discount Security for United States Federal income tax purposes.

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

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

        (2)   Securities for whose payment or redemption money in the necessary amount and in the required currency or currency unit has been theretofore deposited with the Trustee or any Paying Agent (other than the Company) in trust or set aside and segregated in trust by the Company (if the Company shall act as its own Paying Agent) for the Holders of such Securities; PROVIDED that, if such Securities are to be redeemed, notice of such redemption has been duly given pursuant to this Indenture or provision therefor satisfactory to the Trustee has been made; and

        (3)   Securities which have been paid pursuant to Section 4.5 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 that such Securities are held by a bona fide purchaser in whose hands such Securities are valid obligations of the Company;

        PROVIDED, HOWEVER, that in determining whether the Holders of the requisite principal amount of the Outstanding Securities have given any request, demand, authorization, direction, notice, consent or waiver hereunder or whether a quorum is present at a meeting of Holders of Outstanding Securities or the number of votes entitled to be cast by each Holder of a Security in respect of such Security at any such meeting, (1) the principal amount of an Original Issue 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 6.2, (2) the principal amount of a Security denominated in a Foreign Currency or currency unit shall be the Dollar equivalent obtained by converting the specified Foreign Currency or currency unit into Dollars at the Market Exchange Rate on the date of such determination (or, in the case of a Security denominated in a currency unit for which there is no Market Exchange Rate, the Dollar equivalent obtained by adding together the results obtained by converting the Specified Amount of each Component Currency into Dollars at the Market Exchange Rate for each such Component Currency on the date of such determination) of the principal amount (or, in the case of an Original Issue Discount Security, of the amount determined as provided in (1) above) of such Security, and (3) Securities owned by the Company or any other obligor upon the Securities or any Affiliate of the Company or of such other obligor shall be disregarded and deemed not to be Outstanding, except that, in determining whether the Trustee shall be protected in relying

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upon any such request, demand, authorization, direction, notice, consent or waiver, only Securities which the Trustee knows to be so owned shall be so disregarded. 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.

        "Paying Agent" means the Trustee or any other Person 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.

        "Person" or "person" means any individual, corporation, partnership, joint venture, association, joint-stock company, trust, unincorporated organization or government or any agency or political subdivision thereof, or other similar entity.

        "Place of Payment," when used with respect to the Securities of any series, means the place or places where the principal of (and premium, if any) and interest, if any, on the Securities of that series are payable as specified in accordance with Section 2.2 or Section 3.1, as the case may be.

        "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 4.5 in exchange for or in lieu of a mutilated, destroyed, lost or stolen Security shall be deemed 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, in the currency or currency unit in which such Security is payable, at which it is to be redeemed pursuant to this Indenture.

        "Registered Security" means any Security registered in the Security Register (including without limitation any Security in temporary or definitive global registered form).

        "Regular Record Date" for the interest payable on any Interest Payment Date on the Registered Securities of any series means the date specified for that purpose as contemplated by Section 2.2 or Section 3.1, as the case may be, which date shall be, unless otherwise specified pursuant to Section 2.2 or Section 3.1, as the case may be, the fifteenth day preceding such Interest Payment Date, whether or not such day shall be a Business Day.

        "Required Currency" has the meaning specified in Section 1.16.

        "Responsible Trust Officer," when used with respect to the Trustee, means the chairman or any vice chairman of the board of directors, the chairman or any vice chairman of the executive committee of the board of directors, the chairman of the trust committee, the president, any vice president, any assistant vice president, the secretary, any assistant secretary, the treasurer, any assistant treasurer, the cashier, any assistant cashier, any trust officer or assistant trust officer, the controller or any assistant controller or any other officer of the Trustee customarily performing functions similar to those performed by any of the above designated officers and also means, with respect to a particular corporate trust matter, any other officer to whom such matter is referred because of his knowledge of and familiarity with the particular subject.

        "Securities" has the meaning stated in the first recital of this Indenture and more particularly means any Securities (including Medium-Term Debt Securities) authenticated and delivered under this Indenture and, in the case of any Bearer Security, shall include where appropriate any Coupons appertaining thereto.

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        "Security Register" has the meaning specified in Section 4.4.

        "Security Registrar" means the Person appointed as the initial Security Registrar in Section 4.4 or any Person appointed by the Company as a successor or replacement Security Registrar.

        "Special Record Date" for the payment of any Defaulted Interest means a date fixed by the Trustee pursuant to Section 4.6.

        "Specified Amount" has the meaning specified in Section 4.10(i).

        "Stated Maturity," when used with respect to any Security (or Coupon, if any, representing an installment of interest) or any installment of principal thereof or interest thereon, means the date specified in such Security (or Coupon) as the fixed date on which the principal of such Security or such installment of principal or interest is due and payable.

        "Subsidiary" means any Corporation a majority of the Voting Shares of which are at the time owned or controlled, directly or indirectly, by the Company or by one or more Subsidiaries, or by the Company and one or more Subsidiaries.

        "Trustee" means the Person named as the "Trustee" in the first paragraph of this instrument until a successor Trustee shall have become such 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.

        "Trust Indenture Act" means the Trust Indenture Act of 1939, as amended by the Trust Indenture Reform Act of 1990, and as in force on the date as of which this instrument is executed, except as provided in Section 10.5.

        "United States" means the United States of America (including the states and the District of Columbia), its territories, its possessions and other areas subject to its jurisdiction.

        "U.S. Government Obligations" has the meaning specified in Section 5.5.

        "Valuation Date" has the meaning specified in Section 4.10(e).

        "Vice President," when used with respect to the Company or the Trustee, means any vice president, whether or not designated by a number or a word or words added before or after the title "vice president," including, without limitation, any assistant vice president.

        "Voting Shares" means, with respect to any Corporation, securities of any class or classes of capital stock in such Corporation entitling the holders thereof (whether at all times or at the times that such class of capital stock has voting power by reason of the happening of any contingency) to vote in the election of members or the board of directors of comparable body of such Corporation.

        "Yield to Maturity" means the yield to maturity, calculated at the time of issuance of a series of Securities or, if applicable, at the most recent redetermination of interest on such series and calculated in accordance with accepted financial practice.

SECTION 1.2     COMPLIANCE CERTIFICATES AND OPINIONS     

        Upon any application or request by the Company to the Trustee to take any action under any provision of this Indenture, the Company shall furnish to the Trustee an Officers' 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 specifically required by any provision of this

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Indenture relating to such particular application or request, no additional certificate or opinion need be furnished.

        Unless expressly otherwise specified with respect to any certificate or opinion provided for in this Indenture, every certificate or opinion with respect to compliance with a condition or covenant provided for in this Indenture (other than annual certificates provided pursuant to Section 11.4) shall include:

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

        (2)   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;

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

        (4)   a statement as to whether or not, in the opinion of each such individual, such condition or covenant has been complied with.

SECTION 1.3     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 certificate or opinion is 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.

        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.

SECTION 1.4     ACTS OF HOLDERS     

        (a)   Any request, demand, authorization, direction, notice, consent, waiver or other action provided by this Indenture to be given or taken by Holders of Securities of any series may be embodied in and evidenced by (1) one or more instruments of substantially similar tenor signed by such Holders in person or by proxies or agents duly appointed in writing, (2) the record of such Holders voting in favor thereof, either in person or by proxies or agents duly appointed in writing, at any meeting of Holders of Securities of such series duly called and held in accordance with the provisions of Article Fourteen, or (3) a combination of any such record and one or more instruments of substantially similar tenor signed by such Holders in person or by proxies or agents duly appointed in writing. Except as herein otherwise expressly provided, such action shall become effective when such record and/or instrument or instruments are delivered to the Trustee and, where it is hereby expressly required, to the Company. Such record or instrument or instruments (and the action embodied therein and evidenced thereby) are herein sometimes referred to as the "Act" of the Holders signing such instrument or

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instruments or so voting at any such meeting. Proof of execution of any such instrument or of a writing appointing any such proxy or agents shall be sufficient for any purpose of this Indenture and (subject to Section 7.1) 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 of Securities shall be proved in the manner provided in Section 14.6.

        (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. 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 and serial numbers of Bearer Securities held by any Person, and the date of holding the same, may be proved by the production of such Bearer Securities or by a certificate executed by any trust company, bank, banker or other depository, wherever situated, showing that at the date therein mentioned such Person had on deposit with such depository, or exhibited to it, the Bearer Securities therein described; or such facts may be proved by the certificate or affidavit of the Person holding such Bearer Securities, if such certificate or affidavit is deemed by the Trustee to be satisfactory. The Trustee and the Company may assume that such ownership of any Bearer Security continues until (1) another certificate or affidavit bearing a later date issued in respect of the same Bearer Security is produced, (2) such Bearer Security is produced to the Trustee by some other Person, (3) such Bearer Security is surrendered in exchange for a Registered Security, or (4) such Bearer Security is no longer Outstanding.

        (d)   The fact and date of execution of any such instrument or writing pursuant to Subsection (c) above, the authority of the Person executing the same and the principal amount and serial numbers of Bearer Securities held by the Person so executing such instrument or writing and the date of holding the same may also be proved in any other manner which the Trustee deems sufficient; and the Trustee may in any instance require further proof with respect to any of the matters referred to in this Clause.

        (e)   The principal amount and serial numbers of Registered Securities held by any Person and the date of holding the same shall be proved by the Security Register.

        (f)    Any request, demand, authorization, direction, notice, consent, waiver or other Act of a Holder shall bind every future Holder of the same Security and/or Coupon and the Holder of every Security and/or Coupon 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 and/or Coupon.

        (g)   Whenever any Act is to be taken hereunder by the Holders of two or more series of Securities denominated in different currencies (or currency units), then, for the purpose of determining the principal amount of Securities held by such Holders, the aggregate principal amount of the Securities denominated in a Foreign Currency (or any currency unit) shall be deemed to be that amount determined by the Company or by an authorized Exchange Rate Agent and evidenced to the Trustee by an Officers' Certificate as of the date of the taking of such Act by the Holders of the requisite percentage in principal amount of the Securities is evidenced to the Trustee to be equal to the Dollar equivalent obtained by converting the specified Foreign Currency or currency unit into Dollars at the Market Exchange Rate on such date (or, in the case of a Security denominated in a currency unit for which there is no Market Exchange Rate, the Dollar equivalent obtained by adding together the results obtained by converting the Specified Amount of each Component Currency into Dollars at the Market Exchange Rate for each such Component Currency on such date) of the principal amount (or, in the case of an Original Issue Discount Security, the principal amount thereof that would be due and payable as of the declaration of acceleration of the Maturity thereof pursuant to Section 6.2) of such

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Security. An Exchange Rate Agent may be authorized in advance or from time to time by the Company. Any such determination by the Company or by any such Exchange Rate Agent shall be conclusive and binding on all Holders, the Company and the Trustee, and neither the Company nor any such Exchange Rate Agent shall be liable therefor in the absence of bad faith.

        (h)   If the Company shall solicit from the Holders of Registered Securities any request demand, authorization, direction, notice, consent, waiver or other Act, the Company may, at its option, by or pursuant to a Board Resolution, 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 such record date shall be deemed to be Holders for the purposes of determining whether Holders of the requisite proportion of 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 such record date; PROVIDED that no such authorization, agreement or consent by the Holders on such record date shall be deemed effective unless it shall become effective pursuant to the provisions of this Indenture not later than six months after the record date.

SECTION 1.5     NOTICES, ETC., TO TRUSTEE AND COMPANY     

        Any request, demand, authorization, direction, notice, consent, waiver or other Act of Holders or other document provided or permitted by this Indenture to be made upon, given or furnished to, or filed with,

        (1)   the Trustee by any Holder or by the Company shall be made, given, furnished or filed in writing to or with the Trustee at its Corporate Trust Office and unless otherwise herein expressly provided, any such document shall be deemed to be sufficiently made, given, furnished or filed upon its receipt by a Responsible Trust Officer of the Trustee, or

        (2)   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 in person, mailed, first-class postage prepaid, or sent by overnight courier or, until such time as the Company shall have notified the Trustee in writing that it shall no longer accept delivery of notice by telecopy or given by telecopy to the Company addressed to it at the address of its registered office specified in the first paragraph of this instrument or at any other address previously furnished in writing to the Trustee by the Company, or at its telecopy number from time to time furnished in writing to the Trustee expressly for purposes of this Indenture, Attention: Secretary.

SECTION 1.6     NOTICE TO HOLDERS; WAIVER     

        (a)   Where this Indenture provides for notice to Holders of any event:

        (1)   if any of the Securities affected by such event are Registered Securities, such notice shall be sufficiently given (unless otherwise herein expressly provided or unless otherwise specified in such Securities) if in writing and mailed, first-class postage prepaid, delivered in person, or sent by overnight courier, to each Holder affected by such event, at such Holder's address as it appears in the Security Register, within the time prescribed for the giving of such notice, and

        (2)   if any of the Securities affected by such event are Bearer Securities, such notice shall be sufficiently given (unless otherwise herein expressly provided or unless otherwise specified in such Securities) if (i) published once in an Authorized Newspaper in New York City and London and, if applicable, in Luxembourg or such other place of publication as may be required pursuant to the rules and regulations of any securities exchange on which such Securities are listed, and (ii) mailed, first-class

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postage prepaid, delivered in person or sent by overnight courier to such Persons whose names were previously filed with the Trustee, within the time 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 of Registered Securities in the manner specified above, then such notification as shall be made with the approval of the Trustee shall constitute a sufficient notification for every purpose hereunder. In case by reason of the suspension of publication of any Authorized Newspaper or Authorized Newspapers or by reason of any other cause it shall be impracticable to publish any notice to Holders of Bearer Securities as provided above, then such notification to Holders of Bearer Securities as shall be given with the approval of the Trustee shall constitute sufficient notice to such Holders for every purpose hereunder.

        (b)   In any case where notice to a Holder of Registered Securities is given in any manner specified in Subsection (a) above, such notice shall be conclusively presumed to have been duly given, whether or not such Holder receives such notice. In any case where notice to Holders of Registered Securities is given in any manner specified in Subsection (a) above, neither the failure to deliver, mail or send such notice, nor any defect in any notice so mailed or sent, to any particular Holder of a Registered Security shall affect the sufficiency of such notice with respect to other Holders of Registered Securities or the sufficiency of any notice to Holders of Bearer Securities given as provided herein. Neither the failure to give notice by publication to Holders of Bearer Securities as provided in Subsection (a) above, nor any defect in any notice so published, shall affect the sufficiency of any notice to Holders of Registered Securities given as provided herein.

        (c)   Where this Indenture provides for notice in any manner, such notice may be waived in writing by the Person entitled to receive such notice, either before or after the event, and such waiver shall be the equivalent of such notice. Waivers of notice by Holders of Securities 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.

SECTION 1.7     CONFLICT WITH TRUST INDENTURE ACT     

        If any provision hereof limits, qualifies or conflicts with the duties imposed by any of Sections 310 to 317, inclusive, of the Trust Indenture Act through operation of Section 318(c) thereof, such imposed duties shall control. If any provision of this Indenture modifies or excludes any provision of the Trust Indenture Act that may be so modified or excluded, the latter provision shall be deemed to apply to this Indenture as so modified or excluded, as the case may be.

SECTION 1.8     EFFECT OF HEADINGS AND TABLE OF CONTENTS     

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

SECTION 1.9     SUCCESSORS AND ASSIGNS     

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

SECTION 1.10     SEPARABILITY CLAUSE     

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

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SECTION 1.11     BENEFITS OF INDENTURE     

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

SECTION 1.12     NO PERSONAL LIABILITY OF DIRECTORS, OFFICERS, EMPLOYEES AND SHAREHOLDERS     

        No director, officer, employee, incorporator or shareholder of the Company, as such, shall have any liability for any obligations of the Company under the Securities, this Indenture, or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder by accepting Securities waives and releases all such liability. The waiver and release are part of the consideration for issuance of the Securities.

SECTION 1.13     GOVERNING LAW     

        THIS INDENTURE AND THE SECURITIES AND COUPONS SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF COLORADO WITHOUT REGARD TO THE CONFLICTS OF LAW PRINCIPLES THEREOF.

SECTION 1.14     LEGAL HOLIDAYS     

        Except as otherwise specified as contemplated by Section 2.2 or Section 3.1, as the case may be, in any case where any Interest Payment Date, Redemption Date or Stated Maturity of any Security or Coupon shall not be a Business Day at any Place of Payment, then (notwithstanding any other provision of this Indenture or of such Security or Coupon) 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 with the same force and effect as if made on the Interest Payment Date or Redemption Date, or at the Stated Maturity, as the case may be, PROVIDED that no interest shall accrue for the period from and after such Interest Payment Date, Redemption Date or Stated Maturity, as the case may be, to the next succeeding Business Day at such Place of Payment.

SECTION 1.15     MONEYS OF DIFFERENT CURRENCIES TO BE SEGREGATED     

        The Trustee shall segregate moneys, funds and accounts held by the Trustee hereunder in one currency (or currency unit) from any moneys, funds or accounts in any other currencies (or currency units), notwithstanding any provision herein which would otherwise permit the Trustee to commingle such amounts.

SECTION 1.16     PAYMENT TO BE IN PROPER CURRENCY     

        In the case of any Security denominated in any particular currency or currency unit (the "Required Currency"), subject to applicable law and except as otherwise provided herein, therein or in or pursuant to the related Board Resolution, Medium-Term Debt Securities Certificate or supplemental indenture, the obligation of the Company to make any payment of principal, premium or interest thereon shall not be discharged or satisfied by any tender by the Company, or recovery by the Trustee, in any currency or currency unit other than the Required Currency, except to the extent that such tender or recovery shall result in the Trustee's timely holding the full amount of the Required Currency then due and payable. If any such tender or recovery is made in other than the Required Currency, the Trustee may take such actions as it considers appropriate to exchange such other currency or currency unit 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 be liable for any shortfall or delinquency in the full amount of the Required Currency then due and payable, and in no circumstances shall the Trustee be liable therefor. The Company hereby waives any

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defense of payment based upon any such tender or recovery which is not in the Required Currency, or which, when exchanged for the Required Currency by the Trustee, is less than the full amount of the Required Currency then due and payable.

SECTION 1.17     LANGUAGE OF NOTICES, ETC.     

        Any request, demand, authorization, direction, notice, consent or waiver required or permitted under this Indenture shall be in the English language, except that any published notice may be in an official language of the country of publication.

SECTION 1.18     CHANGES IN EXHIBITS     

        At any time and from time to time, the Company may substitute a new form, or add new forms, of the Exhibits hereto. Such substitution shall be effective upon receipt by the Trustee of such new form of Exhibit and a Board Resolution or Officers' Certificate adopting such new form of Exhibit, and thereafter all references in this Indenture to such Exhibit shall be deemed to refer to such new form of Exhibit.

SECTION 1.19     COUNTERPART ORIGINALS     

        The parties may sign any number of copies of this Indenture by the parties thereto in separate counterparts, each of which when signed shall be deemed to be an original, but all of them together represent the same agreement.

ARTICLE TWO

ISSUANCE OF SECURITIES

SECTION 2.1     CREATION OF SECURITIES IN AMOUNT UNLIMITED     

        An unlimited aggregate principal amount of Securities may be issued pursuant to this Article Two and, in the case of Medium-Term Debt Securities, pursuant to Article Three. The Securities (including Medium-Term Debt Securities) may be authenticated and delivered, as authorized by the Board of Directors, in an unlimited number of series up to an aggregate principal amount of Securities for such series as from time to time may be authorized by the Board of Directors. All Securities of each series of this Indenture shall be equally and ratably entitled to the benefits hereof with respect to such series without preference, priority or distinction on account of the actual time of the authentication and delivery or Stated Maturity of the Securities of such series.

SECTION 2.2     DOCUMENTS REQUIRED FOR ISSUANCE OF EACH SERIES OF SECURITIES OTHER THAN MEDIUM-TERM DEBT SECURITIES     

        At any time and from time to time, Securities of each series created pursuant to the provisions of this Article Two may be executed by the Company and delivered to the Trustee and shall be authenticated by the Trustee and delivered to, or upon the order of, the Company upon receipt by the Trustee of the following:

        (a)   A Board Resolution or Board Resolutions authorizing the execution, authentication and delivery of the Securities of the series, and specifying:

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

        (2)   any limit upon the aggregate principal amount of the Securities of the series which may be authenticated and delivered under this Article Two (except for Securities authenticated and delivered upon registration of transfer of, or in exchange for, or in lieu of, other Securities of the series pursuant to Section 4.3, 4.4, 4.5, 10.6 or 12.7 and except for any Securities which, pursuant to Section 4.2, are deemed never to have been authenticated and delivered hereunder);

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        (3)   the date or dates on which the principal (and premium, if any) of any of the Securities of the series are payable or the method of determination thereof;

        (4)   the rate or rates, or the method of determination thereof, at which any of the Securities of the series shall bear interest, if any, 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 for the interest payable on any Registered Securities on any Interest Payment Date;

        (5)   if an Original Issue Discount Security, the Yield to Maturity;

        (6)   the place or places where the principal of (and premium, if any) and interest, if any, on any of the Securities and Coupons, if any, of the series shall be payable and the office or agency for the Securities of the series maintained by the Company pursuant to Section 11.2;

        (7)   the period or periods within which, the price or prices at which and the terms and conditions upon which any of the Securities of the series may be redeemed, in whole or in part, at the option of the Company;

        (8)   the terms of any sinking fund and the obligation, if any, of the Company to redeem or purchase Securities of the series pursuant to any sinking fund or analogous provisions or at the option of a Holder thereof and the period or periods within which, the price or prices at which and the terms and conditions upon which Securities of the series shall be redeemed or purchased, in whole or in part;

        (9)   the terms of the obligation of the Company, if any, to permit the conversion of the Securities of the series into stock or other securities of the Company or of any other corporation;

        (10) the terms, if any, for the attachment to Securities of the series of warrants, options or other rights to purchase or sell stock or other securities of the Company;

        (11) if other than denominations of $1,000 and in any integral multiple thereof, if Registered Securities, and $5,000, if Bearer Securities, for Securities denominated in Dollars, the denominations in which the Securities of the series shall be issuable;

        (12) if other than the principal amount thereof, the portion of the principal amount of any of the Securities of the series which shall be payable upon declaration of acceleration of the Maturity thereof pursuant to Section 6.2;

        (13) the application, if any, of Section 5.3, or such other means of satisfaction and discharge as may be specified for the Securities and Coupons, if any, for a series;

        (14) any deletions or modifications of or additions to the Events of Default set forth in Section 6.1 or covenants of the Company set forth in Section 8.4, Article Nine or Article Eleven pertaining to the Securities of the series;

        (15) the forms of the Securities and Coupons, if any, of the series;

        (16) if other than Dollars, the currency or currencies, or currency unit or units, in which the Securities of such series will be denominated and/or in which payment of the principal of (and premium, if any) and interest, if any, on any of the Securities of the series shall be payable and the Exchange Rate Agent, if any, for such series;

        (17) if the principal of (and premium, if any) or interest, if any, on any of the Securities of the series are to be payable at the election of the Company or a Holder thereof, or under some or all other circumstances, in a currency or currencies, or currency unit or units, other than that in which the Securities are denominated, the period or periods within which, and the terms and conditions upon which, such election may be made, or the other circumstances under which any of the Securities are to be so payable, including without limitation the application of Section 4.10(b) and any deletions to,

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modifications of or additions to the provisions thereof, and any provision requiring the Holder to bear currency exchange costs by deduction from such payments;

        (18) if the amount of payments of principal of (and premium, if any) or interest, if any, on any of the Securities of the series may be determined with reference to an index based on (i) a currency or currencies or currency unit or units other than that in which such Securities are stated to be payable or (ii) any method, not inconsistent with the provisions of this Indenture, specified in or pursuant to such Board Resolution, then in each case (i) and (ii) the manner in which such amounts shall be determined;

        (19) whether the Securities of the series are to be issued as Registered Securities or Bearer Securities (with or without Coupons), or any combination thereof, whether Bearer Securities may be exchanged for Registered Securities of the series and whether Registered Securities may be exchanged for Bearer Securities of the series (if permitted by applicable laws and regulations) and the circumstances under which and the place or places where any such exchanges, if permitted, may be made; and whether any Securities of the series are to be issuable initially in temporary global form and whether any Securities of the series are to be issuable in definitive global form with or without Coupons and, if so, whether beneficial owners of interests in any such definitive Global Security may exchange such interests for Securities of such series and of like tenor of any authorized form and denomination and the circumstances under which and the place or places where any such exchanges may occur, if other than in the manner provided in Section 4.4;

        (20) whether and under what circumstances and with what procedures and documentation the Company will pay additional amounts on any of the Securities and Coupons, if any, of the series to any Holder who is not a U.S. Person (including definition of such term), in respect of any tax assessment or governmental charge withheld or deducted and, if so, whether the Company will have the option to redeem such Securities rather than pay additional amounts (and the terms of any such option);

        (21) the Person to whom any interest on any Registered Security of the series shall be payable, if other than 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, the manner in which, or the Person to whom, any interest on any Bearer Security of the series shall be payable, if otherwise than upon presentation and surrender of the Coupons appertaining thereto as they severally mature and the extent to which, or the manner in which, any interest payable on a temporary Global Security on an Interest Payment Date will be paid if other than in the manner provided in Section 4.3; and

        (22) any other terms of any of the Securities of the series (which terms shall not be inconsistent with the provisions of this Indenture).

        If any of the terms of the series are established by action taken pursuant to a Board Resolution or Board Resolutions, an Officers' Certificate certifying as to such action also shall be delivered to the Trustee.

        (b)   In case the Securities of the series to be authenticated and delivered are to be created pursuant to one or more supplemental indentures, such supplemental indenture or indentures, accompanied by a Board Resolution or Board Resolutions authorizing such supplemental indenture or indentures and designating the new series to be created and prescribing pursuant to Subsection (a) above, consistent with the applicable provisions of this Indenture, the terms and provisions relating to the Securities of the series.

        (c)   [Reserved.]

        (d)   An Opinion of Counsel that all instruments furnished to the Trustee pursuant to this Article 2 conform to the requirements of this Indenture and constitute sufficient authority hereunder for the Trustee to authenticate and deliver the Securities and to deliver the Coupons, if any, of the series; that

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all conditions precedent provided for in this Indenture relating to the authentication and delivery of the Securities and delivery of the Coupons, if any, of the series have been complied with; that the Company has corporate power to execute and deliver the supplemental indenture, if any, and to issue the Securities and Coupons, if any, of the series and has duly taken all necessary corporate action for those purposes; and that the supplemental indenture, if any, as executed and delivered and the Securities and Coupons, if any, of the series, when issued, will be the legal, valid and binding obligations of the Company enforceable against the Company in accordance with their terms (subject to applicable bankruptcy, insolvency, fraudulent transfer or conveyance, reorganization, moratorium or other laws affecting creditors' rights generally from time to time in effect, the enforceability of the Company's obligations also being subject to general principles of equity (regardless of whether such enforceability is considered in a proceeding in equity or at law), and to such other exceptions that are customary in the circumstances); that the Securities and Coupons, if any, of the series, when issued, will be entitled to the benefits of this Indenture, equally and ratably with all other Securities and Coupons, if any, of such series theretofore issued and then outstanding hereunder; and that the amount of Securities then outstanding under this Indenture, including the Securities of the series, will not exceed the amount at the time permitted by law or this Indenture.

        (e)   An Officers' Certificate stating that the Company is not in default under this Indenture and that the issuance of the Securities and Coupons, if any, of the series will not result in any breach of any of the terms, conditions or provisions of, or constitute a default under, the Company's Articles of Incorporation, or other comparable organizational documents, as applicable, or any indenture, mortgage, deed of trust or other agreement or instrument to which the Company is a party or by which it is bound, or any order of any court or administrative agency entered in any proceeding to which the Company is a party or by which it may be bound or to which it may be subject; and that all conditions precedent provided in this Indenture relating to the authentication and delivery of the Securities and Coupons, if any, of the series have been complied with.

        (f)    Such other documents as the Trustee may reasonably require.

ARTICLE THREE

ISSUANCE OF MEDIUM-TERM DEBT SECURITIES

SECTION 3.1     DOCUMENTS REQUIRED FOR ISSUANCE OF EACH SERIES OF MEDIUM-TERM DEBT SECURITIES     

        At any time, and from time to time, Securities (sometimes referred to herein as "Medium-Term Debt Securities") of each series created pursuant to the provisions of this Article Three may be executed by the Company and delivered to the Trustee and shall be authenticated by the Trustee and delivered to, or upon the order of, the Company upon receipt by the Trustee of the following:

        (a)   (a)    A Board Resolution or Board Resolutions authorizing the execution, authentication and delivery of Medium-Term Debt Securities up to a specified aggregate principal amount, in such series and subject to such terms as shall be established by officers of the Company authorized by such resolutions to establish such series and terms.

        (b)   (b)    A Medium-Term Debt Securities Certificate requesting the Trustee to authenticate and deliver Medium-Term Debt Securities of a series as contemplated by Section 4.2, and specifying the following terms with respect to the Medium-Term Debt Securities of the particular series, authorized pursuant to the Board Resolution or Board Resolutions referred to in Subsection (a) above:

        (1)   the title of the Medium-Term Debt Securities of the series (which shall distinguish the Medium-Term Debt Securities of the series from all other Securities);

        (2)   the date of the Medium-Term Debt Securities of the series;

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