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                          Sierra Pacific Power Company
                                     Issuer


                                       AND


                       IBJ SCHRODER BANK & TRUST COMPANY,
                                     Trustee


                     ______________________________________


                                    INDENTURE

                            Dated as of July 1, 1996


                     _______________________________________


                           Subordinated Debt Securities


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                             CROSS-REFERENCE TABLE*




    Section of
Trust Indenture Act                                            Section of
of 1939, as amended                                            Indenture
- -------------------                                            ----------
                                                            
310(a) ......................................................  7.9
310(b) ......................................................  7.8
                                                               7.10
310(c) ......................................................  Inapplicable
311(a) ......................................................  7.13(a)
311(b) ......................................................  7.13(b)
311(c) ......................................................  Inapplicable
312(a) ......................................................  5.1
                                                               5.2(a)
312(b) ......................................................  5.2(b)
312(c) ......................................................  5.2(c)
313(a) ......................................................  5.4(a)
313(b) ......................................................  5.4(b)
313(c) ......................................................  5.4(a)
                                                               5.4(b)
313(d) ......................................................  5.4(c)
314(a) ......................................................  5.3
314(b) ......................................................  Inapplicable
314(c) ......................................................  13.6
314(d) ......................................................  Inapplicable
314(e) ......................................................  13.6
314(f) ......................................................  Inapplicable
315(a) ......................................................  7.1(a)
                                                               7.2
315(b) ......................................................  6.7
315(c) ......................................................  7.1
315(d) ......................................................  7.1(b)
315(e) ......................................................  7.1(c)
                                                               6.7
316(a) ......................................................  6.6
                                                               8.4



316(b) ......................................................  6.4
316(c) ......................................................  8.1
317(a) ......................................................  6.2
317(b) ......................................................  4.3
318(a) ......................................................  13.8

- -----------------
*This Cross-Reference Table does not constitute part of the Indenture and shall
 not have any bearing on the interpretation of any of its terms or provisions.



                              TABLE OF CONTENTS*




                                                                            Page
                                                                            ----
                                                                         
                                   ARTICLE I.
                                   DEFINITIONS . . . . . . . . . . . . . . .  1

SECTION 1.1    Definitions of Terms. . . . . . . . . . . . . . . . . . . . .  1
Affiliate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2
Authenticating Agent . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2
Bankruptcy Law . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2
Board of Directors . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2
Board Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2
Business Day . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2
Certificate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2
Common Securities. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2
Common Securities Guarantee. . . . . . . . . . . . . . . . . . . . . . . . .  2
Company. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2
Corporate Trust Office . . . . . . . . . . . . . . . . . . . . . . . . . . .  2
Custodian. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  3
Declaration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  3
Debt Securities. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  3
Default. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  3
Depositary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  3
Event of Default . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  3
Global Security. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  3
Governmental Obligations . . . . . . . . . . . . . . . . . . . . . . . . . .  3
Guarantee. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4
herein, hereof and hereunder . . . . . . . . . . . . . . . . . . . . . . . .  4
Indenture. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4
Institutional Trustee. . . . . . . . . . . . . . . . . . . . . . . . . . . .  4
Interest Payment Date. . . . . . . . . . . . . . . . . . . . . . . . . . . .  4
Officers' Certificate. . . . . . . . . . . . . . . . . . . . . . . . . . . .  4
Opinion of Counsel . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4
Outstanding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4

- --------------
* This Table of Contents does not constitute part of the Indenture and shall not
  have any bearing upon the interpretation of any of its terms or provisions.


                                        i








                                                                            Page
                                                                            ----
                                                                         
Person . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  5
Preferred Securities . . . . . . . . . . . . . . . . . . . . . . . . . . . .  5
Preferred Securities Guarantee . . . . . . . . . . . . . . . . . . . . . . .  5
Responsible Officer. . . . . . . . . . . . . . . . . . . . . . . . . . . . .  5
Securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  5
Securityholder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  5
Senior Indebtedness. . . . . . . . . . . . . . . . . . . . . . . . . . . . .  5
Sierra Pacific Common Stock. . . . . . . . . . . . . . . . . . . . . . . . .  6
Sierra Pacific Trust . . . . . . . . . . . . . . . . . . . . . . . . . . . .  6
Subsidiary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  6
Trustee. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  6
Trust Indenture Act. . . . . . . . . . . . . . . . . . . . . . . . . . . . .  7
Trust Securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  7
Voting Stock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  7

                                   ARTICLE II.
                      ISSUE, DESCRIPTION, TERMS, EXECUTION,
                     REGISTRATION AND EXCHANGE OF SECURITIES . . . . . . . .  7

SECTION 2.1.   Designation and Terms of Securities . . . . . . . . . . . . .  7
SECTION 2.2.   Form of Securities and Trustee's
               Certificate . . . . . . . . . . . . . . . . . . . . . . . . .  9
SECTION 2.3.   Denominations: Provisions for Payment . . . . . . . . . . . .  9
SECTION 2.4.   Execution and Authentications.. . . . . . . . . . . . . . . . 11
SECTION 2.5.   Registration of Transfer and Exchange . . . . . . . . . . . . 12
SECTION 2.6.   Temporary Securities. . . . . . . . . . . . . . . . . . . . . 13
SECTION 2.7.   Mutilated, Destroyed, Lost or Stolen
               Securities. . . . . . . . . . . . . . . . . . . . . . . . . . 13
SECTION 2.8    Cancellation. . . . . . . . . . . . . . . . . . . . . . . . . 15
SECTION 2.9.   Benefit of Indenture. . . . . . . . . . . . . . . . . . . . . 15
SECTION 2.10.  Authenticating Agent. . . . . . . . . . . . . . . . . . . . . 15
SECTION 2.11.  Global Securities . . . . . . . . . . . . . . . . . . . . . . 16

                                  ARTICLE III.
                        REDEMPTION OF DEBT SECURITIES AND
                             SINKING FUND PROVISIONS . . . . . . . . . . . . 17

SECTION 3.1.   Redemption. . . . . . . . . . . . . . . . . . . . . . . . . . 17


                                        ii







                                                                            Page
                                                                            ----
                                                                         
SECTION 3.2.   Notice of Redemption. . . . . . . . . . . . . . . . . . . . . 17
SECTION 3.3.   Payment Upon Redemption . . . . . . . . . . . . . . . . . . . 18
SECTION 3.4.   Sinking Fund. . . . . . . . . . . . . . . . . . . . . . . . . 19
SECTION 3.5.   Satisfaction of Sinking Fund Payments
               with Debt Securities. . . . . . . . . . . . . . . . . . . . . 19
SECTION 3.6.   Redemption of Debt Securities for Sinking
               Fund. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

                                   ARTICLE IV. . . . . . . . . . . . . . . . 20

SECTION 4.1.   Payment of Principal, Premium and
               Interest. . . . . . . . . . . . . . . . . . . . . . . . . . . 20
SECTION 4.2.   Maintenance or Agency . . . . . . . . . . . . . . . . . . . . 20
SECTION 4.3.   Paying Agents . . . . . . . . . . . . . . . . . . . . . . . . 20
SECTION 4.4.   Appointment to Fill Vacancy in Office
               of Trustee. . . . . . . . . . . . . . . . . . . . . . . . . . 21
SECTION 4.5.   Compliance with Consolidation Provisions. . . . . . . . . . . 22
SECTION 4.6.   Limitation on Dividends; Transactions
               with Affiliates . . . . . . . . . . . . . . . . . . . . . . . 22
SECTION 4.7.   Covenants as to Sierra Pacific Trusts . . . . . . . . . . . . 22

                                   ARTICLE V.
                       SECURITYHOLDERS' LISTS AND REPORTS
                         BY THE COMPANY AND THE TRUSTEE. . . . . . . . . . . 23

SECTION 5.1.   Company to Furnish Trustee Names and
               Addresses of Securityholders. . . . . . . . . . . . . . . . . 23
SECTION 5.2.   Preservation Of Information Communications
               With Securityholders. . . . . . . . . . . . . . . . . . . . . 23
SECTION 5.3.   Reports by the Company. . . . . . . . . . . . . . . . . . . . 23
SECTION 5.4.   Reports by the Trustee. . . . . . . . . . . . . . . . . . . . 24

                                   ARTICLE VI.
                   REMEDIES OF THE TRUSTEE AND SECURITYHOLDERS
                               ON EVENT OF DEFAULT . . . . . . . . . . . . . 24

SECTION 6.1.   Events of Default . . . . . . . . . . . . . . . . . . . . . . 24


                                       iii







                                                                            Page
                                                                            ----
                                                                         
SECTION 6.2.   Collection of Indebtedness and Suits
               for Enforcement by Trustee. . . . . . . . . . . . . . . . . . 27
SECTION 6.3.   Application of Moneys Collected . . . . . . . . . . . . . . . 28
SECTION 6.4.   Limitation on Suits . . . . . . . . . . . . . . . . . . . . . 29
SECTION 6.5.   Rights and Remedies Cumulative; Delay or
               Omission Not Waiver . . . . . . . . . . . . . . . . . . . . . 29
SECTION 6.6.   Control by Securityholders. . . . . . . . . . . . . . . . . . 30
SECTION 6.7.   Undertaking to Pay Costs. . . . . . . . . . . . . . . . . . . 31

                                  ARTICLE VII.
                             CONCERNING THE TRUSTEE. . . . . . . . . . . . . 31

SECTION 7.1.   Certain Duties and Responsibilities
               of Trustee. . . . . . . . . . . . . . . . . . . . . . . . . . 31
SECTION 7.2.   Certain Rights of Trustee . . . . . . . . . . . . . . . . . . 32
SECTION 7.3.   Trustee Not Responsible for Recitals or
               Issuance or Securities. . . . . . . . . . . . . . . . . . . . 34
SECTION 7.4.   May Hold Securities . . . . . . . . . . . . . . . . . . . . . 34
SECTION 7.5.   Moneys Held in Trust. . . . . . . . . . . . . . . . . . . . . 34
SECTION 7.6.   Compensation and Reimbursement. . . . . . . . . . . . . . . . 34
SECTION 7.7.   Reliance on Officers' Certificate . . . . . . . . . . . . . . 35
SECTION 7.8.   Disqualification: Conflicting Interests . . . . . . . . . . . 35
SECTION 7.9.   Corporate Trustee Required; Eligibility . . . . . . . . . . . 35
SECTION 7.10.  Resignation and Removal; Appointment
               of Successor. . . . . . . . . . . . . . . . . . . . . . . . . 36
SECTION 7.11.  Acceptance of Appointment By Successor. . . . . . . . . . . . 37
SECTION 7.12.  Merger, Conversion, Consolidation or
               Succession to Business. . . . . . . . . . . . . . . . . . . . 38
SECTION 7.13.  Preferential Collection of Claims Against
               the Company . . . . . . . . . . . . . . . . . . . . . . . . . 39

                                  ARTICLE VIII.
                         CONCERNING THE SECURITYHOLDERS. . . . . . . . . . . 39

SECTION 8.1.   Evidence of Action by Securityholders . . . . . . . . . . . . 39
SECTION 8.2.   Proof of Execution by Securityholders . . . . . . . . . . . . 40
SECTION 8.3.   Who May be Deemed Owners. . . . . . . . . . . . . . . . . . . 40


                                       iv






                                                                            Page
                                                                            ----
                                                                         
SECTION 8.4.   Certain Securities Owned by Company
               Disregarded . . . . . . . . . . . . . . . . . . . . . . . . . 40
SECTION 8.5.   Actions Binding on Future Securityholders . . . . . . . . . . 41

                                   ARTICLE IX.
                             SUPPLEMENTAL INDENTURES . . . . . . . . . . . . 41

SECTION 9.1.   Supplemental Indentures Without the
               Consent of Securityholders. . . . . . . . . . . . . . . . . . 41
SECTION 9.2.   Supplemental Indentures With Consent of
               Securityholders . . . . . . . . . . . . . . . . . . . . . . . 42
SECTION 9.3.   Effect of Supplemental Indentures . . . . . . . . . . . . . . 43
SECTION 9.4.   Securities Affected by Supplemental
               Indentures. . . . . . . . . . . . . . . . . . . . . . . . . . 43
SECTION 9.5.   Execution of Supplemental Indentures. . . . . . . . . . . . . 43

                                   ARTICLE X.
                              SUCCESSOR CORPORATION. . . . . . . . . . . . . 44

SECTION 10.1.  Company May Consolidate, Etc. . . . . . . . . . . . . . . . . 44
SECTION 10.2.  Successor Corporation Substituted . . . . . . . . . . . . . . 45
SECTION 10.3.  Evidence of Consolidation, Etc. to
               Trustee . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

                                   ARTICLE XI.
                           SATISFACTION AND DISCHARGE. . . . . . . . . . . . 45

SECTION 11.1.  Satisfaction and Discharge of Indenture . . . . . . . . . . . 45
SECTION 11.2.  Discharge of Obligations. . . . . . . . . . . . . . . . . . . 46
SECTION 11.3.  Deposited Moneys to be Held in Trust. . . . . . . . . . . . . 46
SECTION 11.4.  Payment of Moneys Held by Paying Agents . . . . . . . . . . . 47
SECTION 11.5.  Repayment to Company. . . . . . . . . . . . . . . . . . . . . 47

                                  ARTICLE XII.
                IMMUNITY OF INCORPORATORS, STOCKHOLDERS, OFFICERS
                                  AND DIRECTORS. . . . . . . . . . . . . . . 47

SECTION 12.1.  No Recourse . . . . . . . . . . . . . . . . . . . . . . . . . 47


                                       v







                                                                            PAGE
                                                                            ----
                                                                         
                                  ARTICLE XIII.
                            MISCELLANEOUS PROVISIONS . . . . . . . . . . . . 48

SECTION 13.1.  Effect on Successors and Assigns. . . . . . . . . . . . . . . 48
SECTION 13.2.  Actions by Successor. . . . . . . . . . . . . . . . . . . . . 48
SECTION 13.3.  Surrender of Company Powers . . . . . . . . . . . . . . . . . 48
SECTION 13.4.  Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
SECTION 13.5.  Governing Law . . . . . . . . . . . . . . . . . . . . . . . . 49
SECTION 13.6.  Treatment of Debt Securities as Debt. . . . . . . . . . . . . 49
SECTION 13.7.  Compliance Certificates and Opinions. . . . . . . . . . . . . 49
SECTION 13.8.  Payments on Business Days . . . . . . . . . . . . . . . . . . 49
SECTION 13.9.  Conflict with Trust Indenture Act . . . . . . . . . . . . . . 50
SECTION 13.10. Counterparts. . . . . . . . . . . . . . . . . . . . . . . . . 50
SECTION 13.11. Separability. . . . . . . . . . . . . . . . . . . . . . . . . 50
SECTION 13.12. Assignment. . . . . . . . . . . . . . . . . . . . . . . . . . 50
SECTION 13.13. Acknowledgement of Rights . . . . . . . . . . . . . . . . . . 50

                                  ARTICLE XIV.
                           SUBORDINATION OF SECURITIES . . . . . . . . . . . 51

SECTION 14.1.  Agreement to Subordinate. . . . . . . . . . . . . . . . . . . 51
SECTION 14.2.  Default on Senior Indebtedness. . . . . . . . . . . . . . . . 51
SECTION 14.3.  Liquidation; Dissolution; Bankruptcy. . . . . . . . . . . . . 52
SECTION 14.4.  Subrogation . . . . . . . . . . . . . . . . . . . . . . . . . 53
SECTION 14.5.  Trustee to Effectuate Subordination . . . . . . . . . . . . . 54
SECTION 14.6.  Notice by the Company . . . . . . . . . . . . . . . . . . . . 54
SECTION 14.7.  Rights of the Trustee; Holders of Senior
               Indebtedness. . . . . . . . . . . . . . . . . . . . . . . . . 55
SECTION 14.8.  Subordination May Not Be Impaired . . . . . . . . . . . . . . 55


                                     vi







          INDENTURE, dated as of July 1, 1996, among SIERRA PACIFIC POWER
COMPANY, a Nevada corporation (the "Company") and IBJ Schroder Bank & Trust
Company, a New York banking corporation, as trustee (the "Trustee"):

          WHEREAS, for its lawful corporate purposes, the Company has duly
authorized the execution and delivery of this Indenture to provide for the
issuance of unsecured subordinated debt securities (hereinafter referred to as
the "Debt Securities"), in an unlimited aggregate principal amount to be issued
from time to time in one or more series as in this Indenture provided, as
registered Debt Securities without coupons, to be authenticated by the
certificate of the Trustee;

          WHEREAS, to provide the terms and conditions upon which the Debt
Securities are to be authenticated, issued and delivered, the Company has duly
authorized the execution of this Indenture; and

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

          NOW, THEREFORE, in consideration of the premises and the purchase of
the Securities by the holders thereof, it is mutually covenanted and agreed as
follows for the equal and ratable benefit of the holders of Securities:


                                   ARTICLE I.

                                   DEFINITIONS

          SECTION 1.1.  DEFINITIONS OF TERMS.

          The terms defined in this Section (except as in this Indenture
otherwise expressly provided or unless the context otherwise requires) for all
purposes of this Indenture and of any indenture supplemental hereto shall have
the respective meanings specified in this Section and shall include the plural
as well as the singular.  All other terms used in this Indenture that are
defined in the Trust Indenture Act of 1939, as amended, or that are by reference
in such Act defined in the Securities Act of 1933, as amended (except as herein
otherwise expressly provided or unless the context otherwise requires), shall
have the meanings assigned to such terms in said Trust Indenture Act and in said
Securities Act as in force at the date of the execution of this instrument.
          
          "Affiliate" means, with respect to a specified Person, (a) any Person
directly or indirectly owning, controlling or holding with power to vote 10% or
more of the outstanding voting securities or other ownership interests of the
specified Person, (b) any Person 10% or more of whose outstanding voting
securities or other ownership interests are directly or







indirectly owned, controlled or held with power to vote by the specified Person,
(c) any Person directly or indirectly controlling, controlled by, or under 
common control with the specified Person, (d) a partnership in which the 
specified Person is a general partner, (e) any officer or director of the 
specified Person, and (f) if the specified Person is an individual, any entity 
of which the specified Person is an officer, director or general partner.

          "Authenticating Agent" means an authenticating agent with respect to
all or any of the series of Securities appointed with respect to all or any
series of the Securities by the Trustee pursuant to Section 2.10.

          "Bankruptcy Law" means Title 11, U.S. Code, or any similar federal or
state law for the relief of debtors.

          "Board of Directors" means the Board of Directors of the Company or
any duly authorized committee 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" means, with respect to any series of Securities, any
day other than a day on which Federal or State banking institutions in the
Borough of Manhattan, The City of New York, are authorized or obligated by law,
executive order or regulation to close.

          "Certificate" means a certificate signed by the principal executive
officer, the principal financial officer or the principal accounting officer of
the Company.  The Certificate need not comply with the provisions of Section 
13.6.

          "Common Securities" means undivided beneficial interests in the assets
of a Sierra Pacific Trust which rank pari passu with Preferred Securities issued
by such Sierra Pacific Trust; PROVIDED, HOWEVER, that upon the occurrence of an
Event of Default, the rights of holders of Common Securities to payment in
respect of distributions and payments upon liquidation, redemption and otherwise
are subordinated to the rights of holders of Preferred Securities.

          "Common Securities Guarantee" means any guarantee that the Company may
enter into with IBJ Schroder Bank & Trust Company or other Persons that operate
directly or indirectly for the benefit of holders of Common Securities of the
Sierra Pacific Trust.

          "Company" means Sierra Pacific Power Company, a corporation duly
organized and existing under the laws of the State of Nevada, and, subject to
the provisions of Article Ten, shall also include its successors and assigns.

          "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 


                                    2







date hereof is located at 1 State Street, 11th Floor, New York, New York 10004,
Attention: Corporate Trust and Agency Administration.  

          "Custodian" means any receiver, trustee, assignee, liquidator, or
similar official under any Bankruptcy Law.

          "Declaration", with respect to the Sierra Pacific Trust, means the
Amended and Restated Declaration of Trust, dated July 24, 1996, of the Sierra
Pacific Trust.

          "Debt Securities" means the Debt Securities authenticated and
delivered under this Indenture.

          "Default" means any event, act or condition that with notice or lapse
of time, or both, would constitute an Event of Default.

          "Depositary" means, with respect to Securities of any series, for
which the Company shall determine that such Securities will be issued as a
Global Security, The Depository Trust Company, New York, New York, another
clearing agency, or any successor registered as a clearing agency under the
Securities and Exchange Act of 1934, as amended (the "Exchange Act"), or other
applicable statute or regulation, which, in each case, shall be designated by
the Company pursuant to either Section 2.1 or 2.11.

          "Event of Default" means, with respect to Securities of a particular
series, any event specified in Section 6.1, continued for the period of time, if
any, therein designated.

          "Global Security" means, with respect to any series of Securities, a
Security executed by the Company and delivered by the Trustee to the Depositary
or pursuant to the Depositary's instruction, all in accordance with the
Indenture, which shall be registered in the name of the Depositary or its
nominee.

          "Governmental Obligations" means securities that are (i) direct
obligations of the United States of America for the payment of which its full
faith and credit is pledged or (ii) obligations of a Person controlled or
supervised by and acting as an agency or instrumentality of the United States of
America, the payment of which is unconditionally guaranteed as a full faith and
credit obligation by the United States of America that, in either case, are not
callable or redeemable at the option of the issuer thereof, and shall also
include a depositary receipt issued by a bank (as defined in Section 3(a)(2) of
the Securities Act of 1933, as amended) as custodian with respect to any such
Governmental Obligation or a specific payment of principal of or interest on any
such Governmental Obligation held by such custodian for the account of the
holder of such depositary receipt; PROVIDED, HOWEVER, that (except as required
by law) such custodian is not authorized to make any deduction from the amount
payable to the holder of such depositary receipt from any amount received by the
custodian in respect of the Governmental Obligation or the specific payment of
principal of or interest on the Governmental Obligation evidenced by such
depositary receipt.


                                      3







          "Guarantee" means the Preferred Securities Guarantee and the Common
Securities Guarantee.

          "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.

          "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 in accordance with the terms hereof.

          "Institutional Trustee" has the meaning set forth in the Declaration
of the Sierra Pacific Trust.

          "Interest Payment Date", when used with respect to any installment of
interest on a Debt Security of a particular series, means the date specified in
such Debt Security or in a Board Resolution or in an indenture supplemental
hereto with respect to such series as the fixed date on which an installment of
interest with respect to Debt Securities of that series is due and payable.

          "Officers' Certificate" means a certificate signed by the President or
a Vice President and by the Treasurer or an Assistant Treasurer or the
Controller or an Assistant Controller or the Secretary or an Assistant Secretary
of the Company that is delivered to the Trustee in accordance with the terms
hereof.  Each such certificate shall include the statements provided for in
Section 13.6, if and to the extent required by the provisions thereof.

          "Opinion of Counsel" means an opinion in writing of legal counsel, who
may be an employee of or counsel for the Company that is delivered to the
Trustee in accordance with the terms hereof.  Each such opinion shall include
the statements provided for in Section 13.6, if and to the extent required by
the provisions thereof.

          "Outstanding", when used with reference to Debt Securities of any
series, means, subject to the provisions of Section 8.4, as of any particular
time, all Debt Securities of that series theretofore authenticated and delivered
by the Trustee under this Indenture, except (a) Debt Securities theretofore
cancelled by the Trustee or any paying agent, or delivered to the Trustee or any
paying agent for cancellation or that have previously been cancelled; (b) Debt
Securities or portions thereof for the payment or redemption of which moneys or
Governmental Obligations in the necessary amount shall have been deposited in
trust with the Trustee or with any paying agent (other than the Company) or
shall have been set aside and segregated in trust by the Company (if the Company
shall act as its own paying agent); PROVIDED, HOWEVER, that if such Debt
Securities or portions of such Debt Securities are to be redeemed prior to the
maturity thereof, notice of such redemption shall have been given as in Article
Three provided, or provision satisfactory to the Trustee shall have been made
for giving such notice; and (c) Debt Securities in lieu of or in substitution
for which other Debt Securities shall have been authenticated and delivered
pursuant to the terms of Section 2.7.


                                      4







          "Person" means any individual, corporation, partnership, joint-
venture, joint-stock company, unincorporated organization or government or any
agency or political subdivision thereof.

          "Predecessor Security" of any particular Security means every previous
Security evidencing all or a portion of the same debt and as that evidenced by
such particular Security; and, for the purposes of this definition, any Security
authenticated and delivered under Section 2.7 in lieu of a lost, destroyed or
stolen Security shall be deemed to evidence the same debt as the lost, destroyed
or stolen Security.

          "Preferred Securities" means undivided beneficial interests in the
assets of the Sierra Pacific Trust which rank PARI PASSU with Common Securities
issued by the Sierra Pacific Trust; PROVIDED, HOWEVER, that upon the occurrence
of an Event of Default, the rights of holders of Common Securities to payment in
respect of distributions and payments upon liquidation, redemption and otherwise
are subordinated to the rights of holders of Preferred Securities.

          "Preferred Securities Guarantee" means any guarantee that the Company
may enter into with IBJ Schroder Bank & Trust Company or other Persons that
operate directly or indirectly for the benefit of holders of Preferred
Securities of the Sierra Pacific Trust.

          "Responsible Officer" means with respect to the Trustee, any officer
with the Corporate Trust Office of the Trustee, including any vice president,
assistant vice president, or any other officer of the Corporate Trust Office of
the Trustee customarily performing functions similar to those performed by any
of the above designated officers, and also means any other officer to whom such
matter is referred because of his or her knowledge of and familiarity with the
particular subject.

          "Securities" means any Debt Securities. 

          "Securityholder", "holder of Securities", "registered holder", or
other similar term, means the Person or Persons in whose name or names a
particular Security shall be registered on the books of the Company kept for
that purpose in accordance with the terms of this Indenture.

          "Senior Indebtedness" means, with respect to the Company, (i) the
principal, premium, if any, and interest in respect of (A) indebtedness of such
obligor for money borrowed and (B) indebtedness evidenced by securities,
debentures, bonds or other similar instruments issued by such obligor; (ii) all
capital lease obligations of such obligor; (iii) all obligations of such obligor
issued or assumed as the deferred purchase price of property, all conditional
sale obligations of such obligor and all obligations of such obligor under any
title retention agreement (but excluding trade accounts payable arising in the
ordinary course of business); (iv) all obligations of such obligor for the
reimbursement on any letter of credit, banker's acceptance, security purchase
facility or similar credit transaction; (v) all obligations of the type referred
to in clauses (i) through (iv) of other Persons for the payment of which such
obligor is responsible 


                                      5







or liable as obligor, guarantor or otherwise; and (vi) all obligations of the
type referred to in clauses (i) through (v) of other Persons secured by any lien
on any property or asset of such obligor (whether or not such obligation is 
assumed by such obligor), except for (1) any such indebtedness that is by its 
terms subordinated to or PARI PASSU with the Securities, and (2) any
indebtedness between or among such obligor and its Affiliates, including all
other debt securities and guarantees in respect of those debt securities, issued
to (x) any Sierra Pacific Trust or (y) any other trust, or a trustee of such
trust, partnership or other entity affiliated with the Company which is a
financing vehicle of the Company (a "Power Capital Entity") in connection with
the issuance by such Power Capital Entity of preferred securities.

          "Sierra Pacific Common Stock" means the Common Stock, par value $3.75
per share, of the Company or any other class of stock resulting from changes or
reclassifications of such Common Stock consisting solely of changes in par
value, or from par value to no par value, or from no par value to par value. 
Subject to the anti-dilution provisions of any convertible Debt Security,
however, shares of Sierra Pacific Common Stock issuable on conversion of a
Security shall include only shares of the class designated as Common Stock of
the Company at the date of the supplemental indenture, Board Resolution or other
instrument authorizing such Debt Security or shares of any class or classes
resulting from any reclassification or reclassifications thereof and which have
no preference in respect of the payment of dividends or the distribution of
assets upon any voluntary or involuntary liquidation, dissolution or winding-up
of the Company and which are not subject to redemption by the Company, provided
that if at any time there shall be more than one such resulting class, the
shares of each such class then so issuable shall be substantially in the
proportion which the total number of shares of such class resulting from all
such reclassifications bears to the total number of shares of such classes
resulting from all such reclassifications.

          "Sierra Pacific Trust" means Sierra Pacific Power Capital I, a
Delaware business trust or any other similar trust created for the purpose of
issuing preferred securities in connection with the issuance of Securities under
this Indenture.

          "Subsidiary" means, with respect to any Person, (i) any corporation at
least a majority of whose outstanding Voting Stock shall at the time be owned,
directly or indirectly, by such Person or by one or more of its Subsidiaries or
by such Person and one or more of its Subsidiaries, (ii) any general
partnership, joint venture or similar entity, at least a majority of whose
outstanding partnership or similar interests shall at the time be owned by such
Person, or by one or more of its Subsidiaries, or by such Person and one or more
of its Subsidiaries and (iii) any limited partnership of which such Person or
any of its Subsidiaries is a general partner.

          "Trustee" means IBJ Schroder Bank & Trust Company, and, subject to the
provisions of Article Seven, shall also include its successors and assigns, and,
if at any time there is more than one Person acting in such capacity hereunder,
"Trustee" shall mean each such Person.  The term "Trustee" as used with respect
to a particular series of the Securities shall mean the trustee with respect to
that series.


                                      6







          "Trust Indenture Act", means the Trust Indenture, subject to the
provisions of Sections 9.1, 9.2, and 10.01, as in effect at the date of
execution of this instrument.

          "Trust Securities" means Common Securities and Preferred Securities.

          "Voting Stock", as applied to stock of any Person, means shares,
interests, participations or other equivalents in the equity interest (however
designated) in such Person having ordinary voting power for the election of a
majority of the directors (or the equivalent) of such Person, other than shares,
interests, participations or other equivalents having such power only by reason
of the occurrence of a contingency.

                                   ARTICLE II.

                      ISSUE, DESCRIPTION, TERMS, EXECUTION,
                     REGISTRATION AND EXCHANGE OF SECURITIES

          SECTION 2.1.   DESIGNATION AND TERMS OF SECURITIES.

          (a) The aggregate principal amount of Debt Securities that may be
authenticated and delivered under this Indenture is unlimited.  The Debt
Securities may be issued in one or more series up to the aggregate principal
amount of Debt Securities of that series from time to time authorized by or
pursuant to a Board Resolution of the Company or pursuant to one or more
indentures supplemental hereto.  Prior to the initial issuance of Debt
Securities of any series, there shall be established in or pursuant to a Board
Resolution of the Company, and set forth in an Officers, Certificate of the
Company, or established in one or more indentures supplemental hereto:

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

          (2) any limit upon the aggregate principal amount of the Debt
     Securities of that series that may be authenticated and delivered under
     this Indenture (except for Debt Securities authenticated and delivered upon
     registration of transfer of, or in exchange for, or in lieu of, other Debt
     Securities of that series);

          (3) the date or dates on which the principal of the Debt Securities of
     the series is payable;

          (4) the rate or rates at which the Debt Securities of the series shall
     bear interest or the manner of calculation of such rate or rates, if any;

          (5) the date or dates from which such interest shall accrue, the
     Interest Payment Dates on which such interest will be payable or the manner
     of determination of such


                                       7







     Interest Payment Dates and the record date for the determination of holders
     to whom interest is payable on any such Interest Payment Dates;

          (6) the right, if any, to extend the interest payment periods and the
     duration of such extension;

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

          (8) the obligation, if any, of the Company to redeem or purchase Debt
     Securities of the series pursuant to any sinking fund or analogous
     provisions (including payments made in cash in participation of future
     sinking fund obligations) 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, Debt Securities of the series shall be redeemed
     or purchased, in whole or in part, pursuant to such obligation;

          (9) the form of the Debt Securities of the series including the form
     of the Certificate of Authentication for such series;

          (10) if other than denominations of twenty-five U.S. dollars ($25) or
     any integral multiple thereof, the denominations in which the Debt
     Securities of the series shall be issuable;

          (11) any and all other terms with respect to such series (which terms
     shall not be inconsistent with the terms of this Indenture) including any
     terms which may be required by or advisable under United States laws or
     regulations or advisable in connection with the marketing of Debt
     Securities of that series;

          (12) whether the Debt Securities are issuable as a Global Security
     and, in such case, the identity for the Depositary for such series; and

          (13) the terms and conditions, if any, upon which such Debt Securities
     may be convertible into or exchangeable into Sierra Pacific Common Stock or
     other securities of any kind, including the initial conversion or exchange
     price or rate, the conversion or exchange period, the circumstances under
     which any such conversion or exchange right may expire, and any other
     provision in addition to or in lieu of those set forth in this Indenture.

          All Debt Securities of any one series shall be substantially identical
except as to denomination and except as may otherwise be provided in or pursuant
to any such Board Resolution or in any indentures supplemental hereto.


                                      8







          If any of the terms of the series are established by action taken
pursuant to a Board Resolution of the Company, a copy of an appropriate record
of such action shall be certified by the Secretary or an Assistant Secretary of
the Company and delivered to the Trustee at or prior to the delivery of the
Officers' Certificate of the Company setting forth the terms of the series.

          SECTION 2.2.   FORM OF SECURITIES AND TRUSTEE'S CERTIFICATE.

          The Securities of any series and the Trustee's certificate of
authentication to be borne by such Securities shall be substantially of the
tenor and purport as set forth in one or more indentures supplemental hereto or
as provided in a Board Resolution of the Company and as set forth in an
Officers' Certificate of the Company, and may have such letters, numbers or
other marks of identification or designation and such legends or endorsements
printed, lithographed or engraved thereon as the Company may deem appropriate
and as are not inconsistent with the provisions of this Indenture, or as may be
required to comply with any law or with any rule or regulation made pursuant
thereto or with any rule or regulation of any stock exchange on which Securities
of that series may be listed, or to conform to usage.

          SECTION 2.3.   DENOMINATIONS: PROVISIONS FOR PAYMENT.

          The Securities shall be issuable as registered Securities and in the
denominations of twenty-five U.S. dollars ($25) or any integral multiple
thereof, subject to Section 2.1(10). The Securities of a particular series shall
bear interest payable on the dates and at the rate specified with respect to
that series.  The principal of and the interest on the Securities of any series,
as well as any premium thereon in case of redemption thereof prior to maturity,
shall be payable in the coin or currency of the United States of America that at
the time is legal tender for public and private debt, at the office or agency of
the Company maintained for that purpose in the Borough of Manhattan, the City
and State of New York.  Each Security shall be dated the date of its
authentication.  Interest on the Securities shall be computed on the basis of a
360-day year composed of twelve 30-day months.

          The interest installment on any Security that is payable, and is
punctually paid or duly provided for, on any Interest Payment Date for
Securities of that series shall be paid to the Person in whose name said
Security (or one or more Predecessor Securities) is registered at the close of
business on the regular record date for such interest installment.  In the event
that any Security of a particular series or portion thereof is called for
redemption and the redemption date is subsequent to a regular record date with
respect to any Interest Payment Date and prior to such Interest Payment Date,
interest on such Security will be paid upon presentation and surrender of such
Security as provided in Section 3.3.

          Any interest on any Security that is payable, but is not punctually
paid or duly provided for, on any Interest Payment Date for Security of the same
series (herein called "Defaulted Interest") shall forthwith cease to be payable
to the registered holder on the relevant


                                      9







regular record date by virtue of having been such holder; and such Defaulted
Interest shall be paid by the Company, at its election, as provided in clause
(1) or clause (2) below:

          (1) The Company may make payment of any Defaulted Interest on
     Securities to the Persons in whose names such Securities (or their
     respective Predecessor Securities) are registered at the close of business
     on 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 such Security 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 not be more than 15 nor 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 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 Securityholder at his or her address as it
     appears in the Security Register (as hereinafter defined), 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
     mailed as aforesaid, such Defaulted Interest shall be paid to the Persons
     in whose names such Securities (or their respective Predecessor Securities)
     are registered on such special record date and shall be no longer payable
     pursuant to the following clause (2).

          (2) The Company may make payment of any Defaulted Interest on any
     Securities 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 Trustees of the proposed payment
     pursuant to this clause, such manner of payment shall be deemed practicable
     by the Trustee.

          Unless otherwise set forth in a Board Resolution of the Company or one
or more indentures supplemental hereto establishing the terms of any series of
Securities pursuant to Section 2.1 hereof, the term "regular record date" as
used in this Section with respect to a series of Securities with respect to any
Interest Payment Date for such series shall mean either the fifteenth day of the
month immediately preceding the month in which an Interest Payment Date
established for such series pursuant to Section 2.1 hereof shall occur, if such
Interest Payment Date is the first day of a month, or the last day of the month
immediately preceding the month in which an Interest Payment Date established 
for such series pursuant to Section 2.1 hereof


                                      10







shall occur, if such Interest Payment Date is the fifteenth day of a month,
whether or not such date is a Business Day.

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

          SECTION 2.4.   EXECUTION AND AUTHENTICATIONS.

          The Debt Securities shall be signed on behalf of the Company by its
President or one of its Vice Presidents, under its corporate seal attested by
its Secretary or one of its Assistant Secretaries.  Signatures may be in the
form of a manual or facsimile signature.  The Company may use the facsimile
signature of any Person who shall have been a President or Vice President
thereof, or of any Person who shall have been a Secretary or Assistant Secretary
thereof, notwithstanding the fact that at the time the Securities shall be
authenticated and delivered or disposed of such Person shall have ceased to be
the President or a Vice President, or the Secretary or an Assistant Secretary,
of the Company.  The seal of the Company may be in the form of a facsimile of
such seal and may be impressed, affixed, imprinted or otherwise reproduced on
the Securities.  The Securities may contain such notations, legends or
endorsements required by law, stock exchange rule or usage.  Each Security shall
be dated the date of its authentication by the Trustee.

          A Security shall not be valid until authenticated manually by an
authorized signatory of the Trustee, or by an Authenticating Agent.  Such
signature shall be conclusive evidence that the Security so authenticated has
been duly authenticated and delivered hereunder and that the holder is entitled
to the benefits of this Indenture.

          At any time and from time to time after the execution and delivery of
this Indenture, the Company may deliver Securities of any series executed by the
Company to the Trustee for authentication, together with a written order of the
Company for the authentication and delivery of such Securities, signed by its
President or any Vice President and its Treasurer or any Assistant Treasurer,
and the Trustee in accordance with such written order shall authenticate and
deliver such Securities.

          In authenticating such Securities and accepting the additional
responsibilities under this Indenture in relation to such Securities, the
Trustee shall be entitled to receive, and (subject to Section 7.1) shall be
fully protected in relying upon, an Opinion of Counsel stating that the form and
terms thereof have been established in conformity with the provisions of this
Indenture.

          The Trustee shall not be required to authenticate such Securities if
the issue 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 that is not reasonably acceptable to the
Trustee.


                                      11







          SECTION 2.5.   REGISTRATION OF TRANSFER AND EXCHANGE.

          (a) Securities of any series may be exchanged upon presentation
thereof at the office or agency of the Company designated for such purpose in
the Borough of Manhattan, the City and State of New York, for other Securities
of such series of authorized denominations, and for a like aggregate principal
amount, upon payment of a sum sufficient to cover any tax or other governmental
charge in relation thereto, all as provided in this Section.  In respect of any
Securities so surrendered for exchange, the Company shall execute, the Trustee
shall authenticate and such office or agency shall deliver in exchange therefor
the Security or Securities of the same series that the Securityholder making the
exchange shall be entitled to receive, bearing numbers not contemporaneously
outstanding.

          (b) The Company shall keep, or cause to be kept, at its office or
agency designated for such purpose in the Borough of Manhattan, the City and
State of New York, or such other location designated by the Company a register
or registers (herein referred to as the "Security Register") in which, subject
to such reasonable regulations as it may prescribe, the Company shall register
the Securities and the transfers of Securities as in this Article provided and
which at all reasonable times shall be open for inspection by the Trustee.  The
registrar for the purpose of registering Securities and transfer of Securities
as herein provided shall be appointed as authorized by Board Resolution (the
"Security Registrar").

          Upon surrender for transfer of any Security at the office or agency of
the Company designated for such purpose, the Company shall execute, the Trustee
shall authenticate and such office or agency shall deliver in the name of the
transferee or transferees a new Security or Securities of the same series as the
Security presented for a like aggregate principal amount.

          All Securities presented or surrendered for exchange or registration
of transfer, as provided in this Section, shall be accompanied (if so required
by the Company or the Security Registrar) by a written instrument or instruments
of transfer, in form satisfactory to the Company or the Security Registrar, duly
executed by the registered holder or by such holder's duly authorized attorney
in writing.

          (c) No service charge shall be made for any exchange or registration
of transfer of Securities, or issue of new Securities in case of partial
redemption of any series, but the Company may require payment of a sum
sufficient to cover any tax or other governmental charge in relation thereto,
other than exchanges pursuant to Section 2.6, the second paragraph of Section
3.3 and Section 9.4 not involving any transfer.

          (d) The Company shall not be required (i) to issue, exchange or
register the transfer of any Securities during a period beginning at the opening
of business 15 days before the day of the mailing of a notice of redemption of
less than all the Outstanding Securities of the same series and ending at the
close of business on the day of such mailing, nor (ii) to register the transfer
of or exchange any Securities of any series or portions thereof called for
redemption.  


                                      12







The provisions of this Section 2.5 are, with respect to any Global Security,
subject to Section 2.11 hereof.

          SECTION 2.6.   TEMPORARY SECURITIES.

          Pending the preparation of definitive Securities of any series, the
Company may execute, and the Trustee shall authenticate and deliver, temporary
Securities (printed, lithographed or typewritten) of any authorized
denomination.  Such temporary Securities shall be substantially in the form of
the definitive Securities in lieu of which they are issued, but with such
omissions, insertions and variations as may be appropriate for temporary
Securities, all as may be determined by the Company.  Every temporary Security
of any series shall be executed by the Company and be authenticated by the
Trustee upon the same conditions and in substantially the same manner, and with
like effect, as the definitive Securities of such series.  Without unnecessary
delay the Company will execute and will furnish definitive Securities of such
series and thereupon any or all temporary Securities of such series may be
surrendered in exchange therefor (without charge to the holders), at the office
or agency of the Company designated for the purpose in the Borough of Manhattan,
the City and State of New York, and the Trustee shall authenticate and such
office or agency shall deliver in exchange for such temporary Securities an
equal aggregate principal amount of definitive Securities of such series, unless
the Company advises the Trustee to the effect that definitive Securities need
not be executed and furnished until further notice from the Company.  Until so
exchanged, the temporary Securities of such series shall be entitled to the same
benefits under this Indenture as definitive Securities of such series
authenticated and delivered hereunder.

          SECTION 2.7.   MUTILATED, DESTROYED, LOST OR STOLEN SECURITIES.

          In case any temporary or definitive Security shall become mutilated or
be destroyed, lost or stolen, the Company (subject to the next succeeding
sentence) shall execute, and upon the Company's request the Trustee (subject as
aforesaid) shall authenticate and deliver, a new Security of the same series,
bearing a number not contemporaneously outstanding, in exchange and substitution
for the mutilated Security, or in lieu of and in substitution for the Security
so destroyed, lost or stolen.  In every case the applicant for a substituted
Security shall furnish to the Company and the Trustee such security or indemnity
as may be required by them to save each of them harmless, and, in every case of
destruction, loss or theft, the applicant shall also furnish to the Company and
the Trustee evidence to their satisfaction of the destruction, loss or theft of
the applicant's Security and of the ownership thereof.  The Trustee may
authenticate any such substituted Security and deliver the same upon the written
request or authorization of any officer of the Company.  Upon the issuance of
any substituted Security, 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 expenses (including the fees and expenses of the
Trustee) connected therewith.  In case any Security that has matured or is about
to mature shall become mutilated or be destroyed, lost or stolen, the Company
may, instead of issuing a substitute Security, pay or authorize the payment of
the same (without surrender thereof except in the case of a mutilated Security)
if the applicant for such payment shall furnish to the


                                      13







Company and the Trustee such security or indemnity as they may require to save
them harmless, and, in case of destruction, loss or theft, evidence to the
satisfaction of the Company and the Trustee of the destruction, loss or theft of
such Security and of the ownership thereof.

          Every replacement Security issued pursuant to the provisions of this
Section shall constitute an additional contractual obligation of the Company
whether or not the mutilated, destroyed, lost or stolen Security shall be found
at any time, or be enforceable by anyone, and shall be entitled to all the
benefits of this Indenture equally and proportionately with any and all other
Securities of the same series duly issued hereunder.  All Securities shall be
held and owned upon the express condition that the foregoing provisions are
exclusive with respect to the replacement or payment of mutilated, destroyed,
lost or stolen Securities, and shall preclude (to the extent lawful) any and all
other rights \or remedies, notwithstanding any law or statute existing or
hereafter enacted to the contrary with respect to the replacement or payment of
negotiable instruments or other securities without their surrender.


                                      14







          SECTION 2.8.   CANCELLATION.

          All Securities surrendered for the purpose of payment, redemption,
exchange or registration of transfer shall, if surrendered to the Company or any
paying agent, be delivered to the Trustee for cancellation, or, if surrendered
to the Trustee, shall be cancelled by it, and no Securities shall be issued in
lieu thereof except as expressly required or permitted by any of the provisions
of this Indenture.  On request of the Company at the time of such surrender, the
Trustee shall deliver to the Company cancelled Securities held by the Trustee. 
In the absence of such request the Trustee may dispose of cancelled Securities
in accordance with its standard procedures and deliver a certificate of
disposition to the Company.  If the Company shall otherwise acquire any of the
Securities, however, such acquisition shall not operate as a redemption or
satisfaction of the indebtedness represented by such Securities unless and until
the same are delivered to the Trustee for cancellation.

          SECTION 2.9.   BENEFIT OF INDENTURE.

          Nothing in this Indenture or in the Securities, express or implied,
shall give or be construed to give to any Person, other than the parties hereto
and the holders of the Securities (and, with respect to the provisions of
Article Fourteen, the holders of Senior Indebtedness) any legal or equitable
right, remedy or claim under or in respect of this Indenture, or under any
covenant, condition or provision herein contained; all such covenants,
conditions and provisions being for the sole benefit of the parties hereto and
of the holders of the Securities (and, with respect to the provisions of Article
Fourteen, the holders of Senior Indebtedness).

          SECTION 2.10.  AUTHENTICATING AGENT.

          So long as any of the Securities of any series remain Outstanding
there may be an Authenticating Agent for any or all such series of Securities
which the Trustee shall have the right to appoint.  Said Authenticating Agent
shall be authorized to act on behalf of the Trustee to authenticate Securities
of such series issued upon exchange, transfer or partial redemption thereof, 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.  All references in this Indenture to the authentication of
Securities by the Trustee shall be deemed to include authentication by an
Authenticating Agent for such series.  Each Authenticating Agent shall be
acceptable to the Company and shall be a corporation that has a combined capital
and surplus, as most recently reported or determined by it, sufficient under the
laws of any jurisdiction under which it is organized or in which it is doing
business to conduct a trust business, and that is otherwise authorized under
such laws to conduct such business and is subject to supervision or examination
by Federal or State authorities.  If at any time any Authenticating Agent shall
cease to be eligible in accordance with these provisions, it shall resign
immediately.

          Any Authenticating Agent may at any time resign by giving written
notice of resignation to the Trustee and to the Company.  The Trustee may at any
time (and upon request by the Company shall) terminate the agency of any
Authenticating Agent by giving written notice


                                      15







of termination to such Authenticating Agent and to the Company.  Upon 
resignation, termination or cessation of eligibility of any Authenticating 
Agent, the Trustee may appoint an eligible successor Authenticating Agent 
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 as if originally named as an 
Authenticating Agent pursuant hereto.

          SECTION 2.11.  GLOBAL SECURITIES.

          (a) If the Company shall establish pursuant to Section 2.1 that the
Securities of a particular series are to be issued as a Global Security, then
the Company shall execute and the Trustee shall, in accordance with Section 2.4,
authenticate and deliver, a Global Security that (i) shall represent, and shall
be denominated in an amount equal to the aggregate principal amount of, all of
the Outstanding Securities of such series, (ii) shall be registered in the name
of the Depositary or its nominee, (iii) shall be delivered by the Trustee to the
Depositary or pursuant to the Depositary's instruction and (iv) shall bear a
legend substantially to the following effect: "Except as otherwise provided in
Section 2.11 of the Indenture, this Security may be transferred, in whole but
not in part, only to another nominee of the Depositary or to a successor
Depositary or to a nominee of such successor Depositary."

          (b) Notwithstanding the provisions of Section 2.5, the Global Security
of a series may be transferred, in whole but not in part and in the manner
provided in Section 2.5, only to another nominee of the Depositary for such
series, or to a successor Depositary for such series selected or approved by the
Company or to a nominee of such successor Depositary.

          (c) If at any time the Depositary for a series of the Securities
notifies the Company that it is unwilling or unable to continue as Depositary
for such series or if at any time the Depositary for such series shall no longer
be registered or in good standing under the Exchange Act, or other applicable
statute or regulation, and a successor Depositary for such series is not
appointed by the Company within 90 days after the Company receives such notice
or becomes aware of such condition, as the case may be, this Section 2.11 shall
no longer be applicable to the Securities of such series and the Company will
execute, and subject to Section 2.5, the Trustee will authenticate and deliver
the Securities of such series in definitive registered form without coupons, in
authorized denominations, and in an aggregate principal amount equal to the
principal amount of the Global Security of such series in exchange for such
Global Security.  In addition, the Company may at any time determine that the
Securities of any series shall no longer be represented by a Global Security and
that the provisions of this Section 2.11 shall no longer apply to the Securities
of such series.  In such event the Company will execute and subject to Section
2.5, the Trustee, upon receipt of an Officers, Certificate evidencing such
determination by the Company, will authenticate and deliver the Securities of
such series in definitive registered form without coupons, in authorized
denominations, and in an aggregate principal amount equal to the principal
amount of the Global Security of such series in exchange for such Global
Security.  Upon the exchange of the Global Security for such Securities in
definitive registered form without coupons, in authorized denominations, the
Global Security 


                                      16







shall be cancelled by the Trustee.  Such Securities in definitive registered 
form issued in exchange for the Global Security pursuant to this Section 2.11(c)
shall be registered in such names and in such authorized denominations as the 
Depositary, pursuant to instructions from its direct or indirect participants or
otherwise, shall instruct the Trustee.  The Trustee shall deliver such 
Securities to the Depositary for delivery to the Persons in whose names such 
Securities are so registered.

                                  ARTICLE III.

            REDEMPTION OF DEBT SECURITIES AND SINKING FUND PROVISIONS

          SECTION 3.1.   REDEMPTION.

          The Company may redeem the Debt Securities of any series issued
hereunder on and after the dates and in accordance with the terms established
for such series pursuant to Section 2.1 hereof.

          SECTION 3.2.   NOTICE OF REDEMPTION.

          (a) In case the Company shall desire to exercise such right to redeem
all or, as the case may be, a portion of the Debt Securities of any series in
accordance with the right reserved so to do, the Company shall, or shall cause
the Trustee to, give notice of such redemption to holders of the Debt Securities
of such series to be redeemed by mailing, first class postage prepaid, a notice
of such redemption not less than 30 days and not more than 90 days before the
date fixed for redemption of that series to such holders at their last addresses
as they shall appear upon the Security Register unless a shorter period is
specified in the Debt Securities to be redeemed.  Any notice that is mailed in
the manner herein provided shall be conclusively presumed to have been duly
given, whether or not the registered holder receives the notice.  In any case,
failure duly to give such notice to the holder of any Security of any series
designated for redemption in whole or in part, or any defect in the notice,
shall not affect the validity of the proceedings for the redemption of any other
Debt Securities of such series or any other series.  In the case of any
redemption of Debt Securities prior to the expiration of any restriction on such
redemption provided in the terms of such Debt Securities or elsewhere in this
Indenture, the Company shall furnish the Trustee with an Officers' Certificate
evidencing compliance with any such restriction.

          Each such notice of redemption shall specify the date fixed for
redemption and the redemption price at which Debt Securities of that series are
to be redeemed, and shall state that payment of the redemption price of such
Debt Securities to be redeemed will be made at the office or agency of the
Company in the Borough of Manhattan, the City and State of New York, upon
presentation and surrender of such Debt Securities, that interest accrued to the
date fixed for redemption will be paid as specified in said notice, that from
and after said date interest will cease to accrue and that the redemption is for
a sinking fund, if such is the case.  If less than all the Debt Securities of a
series are to be redeemed, the notice to the holders of Debt 


                                      17







Securities of that series to be redeemed in whole or in part shall specify the
particular Debt Securities to be so redeemed.  In case any Security is to be 
redeemed in part only, the notice that relates to such Security shall state the
portion of the principal amount thereof to be redeemed, and shall state that on
and after the redemption date, upon surrender of such Security, a new Security 
or Debt Securities of such series in principal amount equal to the unredeemed 
portion thereof. 

          (b) If less than all the Debt Securities of a series are to be
redeemed, the Company shall give the Trustee at least 45 days' notice in advance
of the date fixed for redemption as to the aggregate principal amount of Debt
Securities of the series to be redeemed, and thereupon the Trustee shall select,
by lot or in such other manner as it shall deem appropriate and fair in its
discretion and that may provide for the selection of a portion or portions
(equal to twenty-five U.S. dollars ($25) or any integral multiple thereof) of
the principal amount of such Debt Securities of a denomination larger than $25,
the Debt Securities to be redeemed and shall thereafter promptly notify the
Company in writing of the numbers of the Debt Securities to be redeemed, in
whole or in part.

          The Company may, if and whenever it shall so elect, by delivery of
instructions signed on its behalf by its President or any Vice President,
instruct the Trustee or any paying agent to call all or any part of the Debt
Securities of a particular series for redemption and to give notice of
redemption in the manner set forth in this Section, such notice to be in the
name of the Company or its own name as the Trustee or such paying agent may deem
advisable.  In any case in which notice of redemption is to be given by the
Trustee or any such paying agent, the Company shall deliver or cause to be
delivered to, or permit to remain with, the Trustee or such paying agent, as the
case may be, such Security Register, transfer books or other records, or
suitable copies or extracts therefrom, sufficient to enable the Trustee or such
paying agent to give any notice by mail that may be required under the
provisions of this Section.

          SECTION 3.3.   PAYMENT UPON REDEMPTION.

          (a) If the giving of notice of redemption shall have been completed as
above provided, the Debt Securities or portions of Debt Securities of the series
to be redeemed specified in such notice shall become due and payable on the date
and at the place stated in such notice at the applicable redemption price,
together with interest accrued to the date fixed for redemption and interest on
such Debt Securities or portions of Debt Securities shall cease to accrue on and
after the date fixed for redemption, unless the Company shall default in the
payment of such redemption price and accrued interest with respect to any such
Security or portion thereof.  On presentation and surrender of such Debt
Securities on or after the date fixed for redemption at the place of payment
specified in the notice, said Debt Securities shall be paid and redeemed at the
applicable redemption price for such series, together with interest accrued
thereon to the date fixed for redemption (but if the date fixed for redemption
is an interest payment date, the interest installment payable on such date shall
be payable to the registered holder at the close of business on the applicable
record date pursuant to Section 2.3).


                                      18







          (b) Upon presentation of any Security of such series that is to be
redeemed in part only, the Company shall execute and the Trustee shall
authenticate and the office or agency where the Security is presented shall
deliver to the holder thereof, at the expense of the Company, a new Security or
Debt Securities of the same series of authorized denominations in principal
amount equal to the unredeemed portion of the Security so presented.

          SECTION 3.4.   SINKING FUND.

          The provisions of Sections 3.4, 3.5 and 3.6 shall be applicable to any
sinking fund for the retirement of Debt Securities of a series, except as
otherwise specified as contemplated by Section 2.1 for Debt Securities of such 
series.

          The minimum amount of any sinking fund payment provided for by the
terms of Debt Securities of any series 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 Debt Securities of any series is herein referred to as an
"optional sinking fund payment".  If provided for by the terms of Debt
Securities of any series, the cash amount of any sinking fund payment may be
subject to reduction as provided in Section 3.5. Each sinking fund payment shall
be applied to the redemption of Debt Securities of any series as provided for by
the terms of Debt Securities of such series.

          SECTION 3.5.   SATISFACTION OF SINKING FUND PAYMENTS WITH DEBT
                         SECURITIES.

          The Company (i) may deliver outstanding Debt Securities of a series
(other than any Debt Securities previously called for redemption) and (ii) may
apply as a credit Debt Securities of a series that have been redeemed either at
the election of the Company pursuant to the terms of such Debt Securities or
through the application of permitted optional sinking fund payments pursuant to
the terms of such Debt Securities, in each case in satisfaction of all or any
part of any sinking fund payment with respect to the Debt Securities of such
series required to be made pursuant to the terms of such Debt Securities as
provided for by the terms of such series, PROVIDED that such Debt Securities
have not been previously so credited.  Such Debt Securities shall be received
and credited for such purpose by the Trustee at the redemption price specified
in such Debt Securities for redemption through operation of the sinking fund and
the amount of such sinking fund payment shall be reduced accordingly.

          SECTION 3.6.   REDEMPTION OF DEBT SECURITIES FOR SINKING FUND.

          Not less than 45 days prior to each sinking fund payment date for any
series of Debt Securities, the Company will deliver to the Trustee an Officers'
Certificate specifying the amount of the next ensuing sinking fund payment for
that series pursuant to the terms of the series, the portion thereof, if any,
that is to be satisfied by delivering and crediting Debt Securities of that
series pursuant to Section 3.5 and the basis for such credit and will, together
with such Officers' Certificate, deliver to the Trustee any Debt Securities to
be so delivered.  Not less 


                                      19







than 30 days before each such sinking fund payment date the Trustee shall select
the Debt Securities to be redeemed upon such sinking fund payment date in the 
manner specified in Section 3.2 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 3.2.  Such notice having been duly given, the redemption of such Debt
Securities shall be made upon the terms and in the manner stated in Section 3.3.


                                   ARTICLE IV.

          SECTION 4.1.   PAYMENT OF PRINCIPAL, PREMIUM AND INTEREST.

          The Company will duly and punctually pay or cause to be paid the
principal of (and premium, if any) and interest on the Debt Securities of that
series at the time and place and in the manner provided herein and established
with respect to such Debt Securities.

          SECTION 4.2.   MAINTENANCE OR AGENCY.

          So long as any series of the Securities remain Outstanding, the
Company agrees to maintain an office or agency in the Borough of Manhattan, the
City and State of New York, with respect to each such series and at such other
location or locations as may be designated as provided in this Section 4.2,
where (i) Securities of that series may be presented for payment, (ii)
Securities of that series may be presented as hereinabove authorized for
registration of transfer and exchange, and (iii) notices and demands to or upon
the Company in respect of the Securities of that series and this Indenture may
be given or served, such designation to continue with respect to such office or
agency until the Company shall, by written notice signed by its President or a
Vice President and delivered to the trustee, designate some other office or
agency for such purposes or any of them.  If at any time the Company shall fail
to maintain any such required office or agency or shall fail to furnish the
Trustee with the address thereof, such presentations, notices and demands may be
made or served at the Corporate Trust Office of the Trustee, and the Company
hereby appoints the Trustee as its agent to receive all such presentations,
notices and demands.

          SECTION 4.3.   PAYING AGENTS.

          (a) If the Company shall appoint one or more paying agents for all or
any series of the Securities, other than the Trustee, the Company will cause
each such paying agent to execute and deliver to the Trustee an instrument in
which such agent shall agree with the Trustee, subject to the provisions of this
Section:

          (1) that it will hold all sums held by it as such agent for the
     payment of the principal of (and premium, if any) or interest on the
     Securities of that series (whether such sums have been paid to it by the
     Company or by any other obligor of such Securities) in trust for the
     benefit of the Persons entitled thereto;


                                      20







          (2) that it will give the Trustee notice of any failure by the Company
     (or by any other obligor of such Securities) to make any payment of the
     principal of (and premium, if any) or interest on the Securities of that
     series when the same shall be due and payable;

          (3) that it will, at any time during the continuance of any failure
     referred to in the preceding paragraph (a)(2) above, upon the written
     request of the Trustee, forthwith pay to the Trustee all sums so held in
     trust by such paying agent; and

          (4) that it will perform all other duties of paying agent as set forth
     in this Indenture.

          (b) If the Company shall act as its own paying agent with respect to
any series of the Securities, it will on or before each due date of the
principal of (and premium, if any) or interest on Securities of that series, set
aside, segregate and hold in trust for the benefit of the Persons entitled
thereto a sum sufficient to pay such principal (and premium, if any) or interest
so becoming due on Securities of that series until such sums shall be paid to
such Persons or otherwise disposed of as herein provided and will promptly
notify the Trustee of such action, or any failure (by it or any other obligor on
such Securities) to take such action.  Whenever the Company shall have one or
more paying agents for any series of Securities, it will, prior to each due date
of the principal of (and premium, if any) or interest on any Securities of that
series, deposit with the paying agent a sum sufficient to pay the principal (and
premium, if any) or interest so becoming due, such sum to be held in trust for
the benefit of the Persons entitled to such principal, premium or interest, and
(unless such paying agent is the Trustee) the Company will promptly notify the
Trustee of this action or failure so to act.

          (c) Notwithstanding anything in this Section to the contrary, (i) the
agreement to hold sums in trust as provided in this Section is subject to the
provisions of Section 11.5, and (ii) the Company may at any time, for the
purpose of obtaining the satisfaction and discharge of this Indenture or for any
other purpose, pay, or 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 terms and conditions as those upon which such sums were
held by the Company or such paying agent; 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.

          SECTION 4.4.   APPOINTMENT TO FILL VACANCY IN OFFICE OF TRUSTEE.

          The Company, whenever necessary to avoid or fill a vacancy in the
office of Trustee, will appoint, in the manner provided in Section 7.10, a
Trustee, so that there shall at all times be a Trustee hereunder.


                                      21







          SECTION 4.5.   COMPLIANCE WITH CONSOLIDATION PROVISIONS.

          The Company will not, while any of the Securities remain Outstanding,
consolidate with, or merge into, or merge into itself, or sell or convey all or
substantially all of its property to any other company unless the provisions of
Article Ten hereof are complied with.

          SECTION 4.6.   LIMITATION ON DIVIDENDS; TRANSACTIONS WITH AFFILIATES.

            If Securities are issued to a Sierra Pacific Trust or a trustee of
such trust in connection with the issuance of Trust Securities by such Sierra
Pacific Trust and (i) there shall have occurred any event that would constitute
an Event of Default, (ii) Sierra Pacific shall be in default with respect to its
payment of any obligations under the Preferred Securities Guarantee or Common
Securities Guarantee relating to such Sierra Pacific Trust or (iii) the Company
shall have given notice of its election to defer payments of interest on such
Securities by extending the interest payment period as provided in the Indenture
and such period, or any extension thereof, shall be continuing, then (a) the
Company shall not declare or pay any dividends on, make any distributions with
respect to, or redeem, purchase or make a liquidation payment with respect to,
any of its capital stock (other than stock dividends paid by the Company which
consist of the same class as that on which the dividend is being paid), (b) the
Company shall not make any payment of interest, principal or premium, if any, on
or repay, repurchase or redeem any debt securities issued by the Company which
rank pari passu with or Junior to such Securities, and (c) shall not make any
guarantee payment with respect to the foregoing (other than pursuant to the
Guarantee).

          SECTION 4.7.   COVENANTS AS TO SIERRA PACIFIC TRUSTS. 

          In the event Securities are issued to a Sierra Pacific Trust or a
trustee of such trust in connection with the issuance of Trust Securities by
such Sierra Pacific Trust, for so long as such Trust Securities remain
outstanding, the Company will (i) maintain 100% direct or indirect ownership of
the Common Securities of such Sierra Pacific Trust; PROVIDED, however, that any
permitted successor of the Company under the Indenture may succeed to the
Company's ownership of the Common Securities, and (ii) use its reasonable
efforts to cause such Sierra Pacific Trust (a) to remain a statutory business
trust, except in connection with a distribution of Securities, the redemption of
all of the Trust Securities of such Sierra Pacific Trust or certain mergers,
consolidations or amalgamations, each as permitted by the Declaration of such
Sierra Pacific Trust, and (b) to otherwise continue not to be treated as an
association taxable as a corporation or partnership for United States federal
income tax purposes.


                                      22






                                   ARTICLE V.

                       SECURITYHOLDERS' LISTS AND REPORTS
                         BY THE COMPANY AND THE TRUSTEE

          SECTION 5.1.   COMPANY TO FURNISH TRUSTEE NAMES AND
                         ADDRESSES OF SECURITYHOLDERS.

          The Company will furnish or cause to be furnished to the Trustee (a)
on a monthly basis on each regular record date (as defined in Section 2.3) a
list, in such form as the Trustee may reasonably require, of the names and
addresses of the holders of each series of Securities as of such regular record
date, PROVIDED that the Company shall not be obligated to furnish or cause to
furnish such list at any time that the list shall not differ in any respect from
the most recent list furnished to the Trustee by the Company and (b) at such
other times as the Trustee may request in writing within 30 days after the
receipt by the Company of any such request, a list of similar form and content
as of a date not more than 15 days prior to the time such list is furnished;
PROVIDED, HOWEVER, that, in either case, no such list need be furnished for any
series for which the Trustee shall be the Security Registrar.

          SECTION 5.2.   PRESERVATION OF INFORMATION; COMMUNICATIONS WITH
                         SECURITYHOLDERS.

          (a) The Trustee shall preserve, in as current a form as is reasonably
practicable, all information as to the names and addresses of the holders of
Securities contained in the most recent list furnished to it as provided in
Section 5.1 and as to the names and addresses of holders of Securities received
by the Trustee in its capacity as Security Registrar (if acting in such 
capacity).

          (b) The Trustee may destroy any list furnished to it as provided in
Section 5.1 upon receipt of a new list so furnished.

          (c) Securityholders may communicate as provided in Section 312(b) of
the Trust Indenture Act with other Securityholders with respect to their rights
under this Indenture or under the Securities.

          SECTION 5.3.   REPORTS BY THE COMPANY.

          (a) The Company covenants and agrees to file with the Trustee, within
15 days after the Company is required to file the same with the Commission,
copies of the annual reports and of the information, documents and other reports
(or copies of such portions of any of the foregoing as the Commission may from
time to time by rules and regulations prescribe) that the Company may be
required to file with the Commission pursuant to Section 13 or Section 15(d) of
the Exchange Act; or, if the Company is not required to file information,
documents or reports pursuant to either of such sections, then to file with the
Trustee and the Commission,


                                      23







in accordance with the rules and regulations prescribed from time to time by the
Commission, such of the supplementary and periodic information, documents and 
reports that may be required pursuant to Section 13 of the Exchange Act, in 
respect of a security listed and registered on a national securities exchange as
may be prescribed from time to time in such rules and regulations.

          (b) The Company covenants and agrees to file with the Trustee and the
Commission, in accordance with the rules and regulations prescribed from to time
by the Commission, such additional information, documents and reports with
respect to compliance by the Company with the conditions and covenants provided
for in this Indenture as may be required from time to time by such rules and
regulations.

          (c) The Company covenants and agrees to transmit by mail, first class
postage prepaid, or reputable over-night delivery service that provides for
evidence of receipt, to the Securityholders, as their names and addresses appear
upon the Security Register, within 30 days after the filing thereof with the
Trustee, such summaries of any information, documents and reports required to be
filed by the Company pursuant to subsections (a) and (b) of this Section as may
be required by rules and regulations prescribed from time to time by the
Commission.

          SECTION 5.4.   REPORTS BY THE TRUSTEE.

          (a) On or before July 15 in each year in which any of the Securities
are Outstanding, the Trustee shall transmit by mail, first class postage
prepaid, to the Securityholders, as their names and addresses appear upon the
Security Register, a brief report dated as of the preceding May 15, if and to
the extent required under Section 313(a) of the Trust Indenture Act.

          (b) The Trustee shall comply with Section 313(b) and 313(c) of the
Trust Indenture Act.

          (c) A copy of each such report shall, at the time of such transmission
to Securityholders, be filed by the Trustee with the Company, with each stock
exchange upon which any Securities are listed (if so listed) and also with the
Commission.  The Company agrees to notify the Trustee when any Securities become
listed on any stock exchange.


                                   ARTICLE VI.

                   REMEDIES OF THE TRUSTEE AND SECURITYHOLDERS
                               ON EVENT OF DEFAULT

          SECTION 6.1.   EVENTS OF DEFAULT.

          (a) Whenever used herein with respect to Securities of a particular
series, "Event of Default" means any one or more of the following events that
has occurred and is continuing:


                                      24







          (1) the Company defaults in the payment of any installment of interest
     upon any of the Securities of that series, as and when the same shall
     become due and payable, and continuance of such default for a period of 30
     days; PROVIDED, however, that a valid extension of an interest payment
     period by the Company in accordance with the terms of any indenture
     supplemental hereto, shall not constitute a default in the payment of
     interest for this purpose;

          (2) the Company defaults in the payment of the principal of (or
     premium, if any, on) any of the Securities of that series as and when the
     same shall become due and payable whether at maturity, upon redemption, by
     declaration or otherwise, or in any payment required by any sinking or
     analogous fund established with respect to that series; PROVIDED, HOWEVER,
     that a valid extension of the maturity of such Securities in accordance
     with the terms of any indenture supplemental hereto shall not constitute a
     default in the payment of principal or premium, if any;

          (3) if applicable to the Securities of that series, failure by the
     Company to issue Sierra Pacific Common Stock upon an election by the Holder
     or Holders of such Debt Securities to convert such Debt Securities into
     shares of Sierra Pacific Common Stock pursuant to the supplemental
     indenture, Board Resolution or other instrument authorizing such series of
     Securities;

          (4) the Company fails to observe or perform any other of its covenants
     or agreements with respect to that series contained in this Indenture or
     otherwise established with respect to that series of Securities pursuant to
     Section 2.1 hereof (other than a covenant or agreement that has been
     expressly included in this Indenture solely for the benefit of one or more
     series of Securities other than such series) for a period of 90 days after
     the date on which written notice of such failure, requiring the same to be
     remedied and stating that such notice is a "Notice of Default" hereunder,
     shall have been given to the Company by the Trustee, by registered or
     certified mail, or to the Company and the Trustee by the holders of at
     least 25% in principal amount of the Securities of that series at the time
     Outstanding;

          (5) the Company pursuant to or within the meaning of any Bankruptcy
     Law (i) commences a voluntary case, (ii) consents to the entry of an order
     for relief against it in an involuntary case, (iii) consents to the
     appointment of a Custodian of it or for all or substantially all of its
     property or (iv) makes a general assignment for the benefit of its
     creditors;

          (6) a court of competent jurisdiction enters an order under any
     Bankruptcy Law that (i) is for relief against the Company in an involuntary
     case, (ii) appoints a Custodian of the Company for all or substantially all
     of their respective property, or (iii) orders the liquidation of the
     Company or the Guarantor, and the order or decree remains unstayed and in
     effect for 90 days; or


                                      25







          (7) in the event Securities are issued to a Sierra Pacific Trust or a
     trustee of such trust in connection with the issuance of Trust Securities
     by such Sierra Pacific Trust, such Sierra Pacific Trust shall have
     voluntarily or involuntarily dissolved, wound-up its business or otherwise
     terminated its existence except in connection with (i) the distribution of
     Securities to holders of Trust Securities in liquidation of their interests
     in such Sierra Pacific Trust, (ii) the redemption of all of the outstanding
     Trust Securities of such Sierra Pacific Trust or (iii) certain mergers,
     consolidations or amalgamation, each as permitted by the Declaration of
     such Sierra Pacific Trust.

          (b) In each and every such case, unless the principal of all the
Securities of that series shall have already become due and payable, either the
Trustee or the holders of not less than 25% in aggregate principal amount of the
Securities of that series then Outstanding hereunder, by notice in writing to
the Company (and to the Trustee if given by such Securityholders), may declare
the principal of all the Securities of that series to be due and payable
immediately, and upon any such declaration the same shall become and shall be
immediately due and payable, notwithstanding anything contained in this
Indenture or in the Securities of that series or established with respect to
that series pursuant to Section 2.1 to the contrary.

          (c) At any time after the principal of the Securities of that series
shall have been so declared due and payable, and before any judgment or decree
for the payment of the moneys due shall have been obtained or entered as
hereinafter provided, the holders of a majority in aggregate principal amount of
the Securities of that series then Outstanding hereunder, by written notice to
the Company and the Trustee, may rescind and annul such declaration and its
consequences if: (i) the Company has paid or deposited with the Trustee a sum
sufficient to pay all matured installments of interest upon all the Securities
of that series and the principal of (and premium, if any, on) any and all
Securities of that series that shall have become due otherwise than by
acceleration (with interest upon such principal and premium, if any, and, to the
extent that such payment is enforceable under applicable law, upon overdue
installments of interest, at the rate per annum expressed in the Securities of
that series to the date of such payment or deposit) and the amount payable to
the Trustee under Section 7.6, and (ii) any and all Events of Default under the
Indenture with respect to such series, other than the nonpayment of principal on
Securities of that series that shall not have become due by their terms, shall
have been remedied or waived as provided in Section 6.6.

          No such rescission and annulment shall extend to or shall affect any
subsequent default or impair any right consequent thereon.

          (d) In case the Trustee shall have proceeded to enforce any right with
respect to Securities of that series under this Indenture and such proceedings
shall have been discontinued or abandoned because of such rescission or
annulment or for any other reason or shall have been determined adversely to the
Trustee, then and in every such case the Company and the Trustee shall be
restored respectively to their former positions and rights hereunder, and all
rights,


                                      26







remedies and powers of the Company and the Trustee shall continue as though no
such proceedings had been taken.

          SECTION 6.2.   COLLECTION OF INDEBTEDNESS AND SUITS FOR ENFORCEMENT BY
                         TRUSTEE.

          (a) The Company covenants that (1) in case it shall default in the
payment of any installment of interest on any of the Securities of a series, or
any payment required by any sinking or analogous fund established with respect
to that series as and when the same shall have become due and payable, and such
default shall have continued for a period of 90 Business Days, or (2) in case it
shall default in the payment of the principal of (or premium, if any, on) any of
the Securities of a series when the same shall have become due and payable,
whether upon maturity of the Securities of a series or upon redemption or upon
declaration or otherwise, then, upon demand of the Trustee or the Guarantor will
pay to the Trustee, for the benefit of the holders of the Securities of that
series, the whole amount that then shall have been become due and payable on all
such Securities for principal (and premium, if any) or interest, or both, as the
case may be, with interest upon the overdue principal (and premium, if any) and
(to the extent that payment of such interest is enforceable under applicable law
and, if the Securities are held by a Sierra Pacific Trust or a trustee of such
trust, without duplication of any other amounts paid by such Sierra Pacific
Trust or trustee in respect thereof) upon overdue installments of interest at
the rate per annum expressed in the Securities of that series; and, in addition
thereto, such further amount as shall be sufficient to cover the costs and
expenses of collection, and the amount payable to the Trustee under Section 7.6.

          (b) 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, shall
be entitled and empowered to institute any action or proceedings at law or in
equity for the collection of the sums so due and unpaid, and may prosecute any
such action or proceeding to judgment or final decree, and may enforce any such
judgment or final decree against the Company or other obligor upon the
Securities of that series and collect the moneys adjudged or decreed to be
payable in the manner provided by law out of the property of the Company or
other obligor upon the Securities of that series, wherever situated.

          (c) In case of any receivership, insolvency, liquidation, bankruptcy,
reorganization, readjustment, arrangement, composition or judicial proceedings
affected the Company or the creditors or property of either, the Trustee shall
have power to intervene in such proceedings and take any action therein that may
be permitted by the court and shall (except as may be otherwise provided by law)
be entitled to file such proofs of claim and other papers and documents as may
be necessary or advisable in order to have the claims of the Trustee and of the
holders of Securities of such series allowed for the entire amount due and
payable by the Company under the Indenture at the date of institution of such
proceedings and for any additional amount that may become due and payable by the
Company after such date, and to collect and receive any moneys or other property
payable or deliverable on any such claim, and to distribute the same after the
deduction of the amount payable to the Trustee under Section 7.6; and any


                                      27





receiver, assignee or trustee in bankruptcy or reorganization is hereby
authorized by each of the holders of Securities of such series to make such
payments to the Trustee, and, in the event that the Trustee shall consent to the
making of such payments directly to such Securityholders, to pay to the Trustee
any amount due it under Section 7.6.

          (d) All rights of action and of asserting claims under this Indenture,
or under any of the terms established with respect to Securities of that series,
may be enforced by the Trustee without the possession of any of such Securities,
or the production thereof at any trial or other proceeding relative thereto, and
any such suit or 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 payment to the Trustee of any amounts due under Section 7.6,
be for the ratable benefit of the holders of the Securities of such series.

          In case of an Event of Default hereunder, the Trustee may in its
discretion proceed to protect and enforce the rights vested in it by this
Indenture by such appropriate judicial proceedings as the Trustee shall deem
most effectual to protect and enforce any of such rights, either at law or in
equity or in bankruptcy or otherwise, whether for the specific enforcement of
any covenant or agreement contained in the Indenture or in aid of the exercise
of any power granted in this Indenture, or to enforce any other legal or
equitable right vested in the Trustee by this Indenture or by law.

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

          SECTION 6.3.   APPLICATION OF MONEYS COLLECTED.

          Any moneys collected by the Trustee pursuant to this Article with
respect to a particular series of Securities shall be applied in the following
order, at the date or dates fixed by the Trustee and, in case of the
distribution of such moneys on account of principal (or premium, if any) or
interest, upon presentation of the Securities of that series, and notation
thereon the payment, if only partially paid, and upon surrender thereof if fully
paid:

          FIRST: To the payment of costs and expenses of collection and of all
     amounts payable to the Trustee under Section 7.6;

          SECOND: To the payment of all Senior Indebtedness of the Company if
     and to the extent required by Article Fourteen; and

          THIRD: To the payment of the amounts then due and unpaid upon
     Securities of such series for principal (and premium, if any) and interest,
     in respect of which or for the benefit of which such money has been
     collected, ratably, without preference or 


                                      28







     priority of any kind, according to the amounts due and payable on such 
     Securities for principal (and premium, if any) and interest, respectively.

          SECTION 6.4.   LIMITATION ON SUITS.

          No holder of any Security of any series shall have any right by virtue
or by availing of any provision of this Indenture to institute any suit, action
or proceeding in equity or at law upon or under or with respect to this
Indenture or for the appointment of a receiver or trustee, or for any other
remedy hereunder, unless (i) such holder previously shall have given to the
Trustee written notice of an Event of Default and of the continuance thereof
with respect to the Securities of such series specifying such Event of Default,
as hereinbefore provided; (ii) the holders of not less than 25% in aggregate
principal amount of the Securities of such series then Outstanding shall have
made written request upon the Trustee to institute such action, suit or
proceeding in its own name as trustee hereunder; (iii) such holder or holders
shall have offered to the Trustee such reasonable indemnity as it may require
against the costs, expenses and liabilities to be incurred therein or thereby;
and (iv) the Trustee for 60 days after its receipt of such notice, request and
offer of indemnity, shall have failed to institute any such action, suit or
proceeding and (v) during such 60 day period, the holders of a majority in
principal amount of the Securities of that series do not give the Trustee a
direction inconsistent with the request.

          Notwithstanding anything contained herein to the contrary or  any
other provisions of this Indenture, the right of any holder of any Security to
receive payment of the principal of (and premium, if any) and interest on such
Security, as therein provided, on or after the respective due dates expressed in
such Security (or in the case of redemption, on the redemption date), or to
institute suit for the enforcement of any such payment on or after such
respective dates or redemption date, shall not be impaired or affected without
the consent of such holder and by accepting a Security hereunder it is expressly
understood, intended and covenanted by the taker and holder of every Security of
such series with every other such taker and holder and the Trustee, that no one
or more holders of Securities of such series shall have any right in any manner
whatsoever by virtue or by availing of any provision of this Indenture to
affect, disturb or prejudice the rights of the holders of any other of such
Securities, or to obtain or seek to obtain priority over or preference to any
other such holder, or to enforce any right under this Indenture, except in the
manner herein provided and for the equal, ratable and common benefit of all
holders of Securities of series.  For the protection and enforcement of the
provisions of this Section, each and every Securityholder and the Trustee shall
be entitled to such relief as can be given either at law or in equity.

          SECTION 6.5.   RIGHTS AND REMEDIES CUMULATIVE; DELAY OR OMISSION NOT
                         WAIVER.

          (a) Except as otherwise provided in Section 2.7, all powers and
remedies given by this Article to the Trustee or to the Securityholders shall,
to the extent permitted by law, be deemed cumulative and not exclusive of any
other powers and remedies available to the Trustee or the holders of the
Securities, by judicial proceedings or otherwise, to enforce the performance 


                                      29







or observance of the covenants and agreements contained in this Indenture or
otherwise established with respect to such Securities.

          (b) No delay or omission of the Trustee or of any holder of any of the
Securities to exercise any right or power accruing upon any Event of Default
occurring and continuing as aforesaid shall impair any such right or power, or
shall be construed to be a waiver of any such default or on acquiescence
therein; and, subject to the provisions of Section 6.4, every power and remedy
given by this Article or by law to the Trustee or the Securityholders may be
exercised from time to time, and as often as shall be deemed expedient, by the
Trustee or by the Securityholders.

          SECTION 6.6.   CONTROL BY SECURITYHOLDERS.

          The holders of a majority in aggregate principal amount of the
Securities of any series at the time Outstanding, determined in accordance with
Section 8.4, 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 such series;
PROVIDED, HOWEVER, that such direction shall not be in conflict with any rule of
law or with this Indenture or be unduly prejudicial to the rights of holders of
Securities of any other series at the time Outstanding determined in accordance
with Section 8.4.  Subject to the provisions of Section 7.1, the Trustee shall
have the right to decline to follow any such direction if the Trustee in good
faith shall, by a Responsible Officer or Officers of the Trustee, determine that
the proceeding so directed would involve the Trustee in personal liability.  The
holders of a majority in aggregate principal amount of the Securities of any
series at the time Outstanding affected thereby, determined in accordance with
Section 8.4, may on behalf of the holders of all of the Securities of such
series waive any past default in the performance of any of the covenants
contained herein or established pursuant to Section 2.1 with respect to such
series and its consequences, except (i) a default in the payment of the
principal of, or premium, if any, or interest on, any of the Securities of that
series as and when the same shall become due by the terms of such Securities
otherwise than by acceleration (unless such default has been cured and a sum
sufficient to pay all matured installments of interest and principal and any
premium has been deposited with the Trustee (in accordance with Section 6.1(c)),
(ii) a default in the covenants contained in Section 4.6 or (iii) in respect of
a covenant or provision hereof which under Article Nine cannot be modified or
amended without the consent of the Holder of each Outstanding Security of such
series affected; PROVIDED, HOWEVER, that if the Debt Securities of such series
are held by a Sierra Pacific Trust or a trustee of such trust, such waiver or
modification to such waiver shall not be effective until the holders of a
majority in liquidation preference of Trust Securities of the applicable Sierra
Pacific Trust shall have consented to such waiver or modification to such
waiver; PROVIDED FURTHER, that if the consent of the Holder of each Outstanding
Debt Security is required, such waiver shall not be effective until each holder
of the Trust Securities of the applicable Sierra Pacific Trust shall have
consented to such waiver.  Upon any such waiver, the default covered thereby
shall be deemed to be cured for all purposes of this Indenture and the Company,
the Trustee and the holders of the Securities of such series shall 


                                      30








be restored to their former positions and rights hereunder, respectively; but no
such waiver shall extend to any subsequent or other default or impair any right 
consequent thereon.

          SECTION 6.7.   UNDERTAKING TO PAY COSTS.

          All parties to this Indenture agree, and each holder of any Securities
by such holder's 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 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
Trustee, to any suit instituted by any Securityholder, or group of
Securityholders, holding more than 10% in aggregate principal amount of the
Outstanding Securities of any series, or to any suit instituted by any
Securityholder for the enforcement of the payment of the principal of (or
premium, if any) or interest on any Security of such series, on or after the
respective due dates expressed in such Security or established pursuant to this
Indenture.


                                  ARTICLE VII.

                             CONCERNING THE TRUSTEE

          SECTION 7.1.   CERTAIN DUTIES AND RESPONSIBILITIES OF TRUSTEE.

          (a) The Trustee prior to the occurrence of an Event of Default with
respect to the Securities of a series and after the curing of all Events of
Default with respect to the Securities of that series that may have occurred,
shall undertake to perform with respect to the Securities of such series such
duties and only such duties as are specifically set forth in this Indenture,and
no implied covenants shall be read into this Indenture against the Trustee.  In
case an Event of Default with respect to the Securities of a series has occurred
(that has not been cured or waived), the Trustee shall exercise with respect to
Securities of that 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.


          (b) 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) prior to the occurrence of an Event of Default with respect to the
     Securities of a series and after the curing or waiving of all such Events
     of Default with respect to that series that may have occurred:


                                      31







               (i) the duties and obligations of the Trustee shall with respect
          to the Securities of such series be determined solely by the express
          provisions of this Indenture, and the Trustee shall not be liable with
          respect to the Securities of such series except for the performance of
          such duties and obligations as are specifically set forth in this
          Indenture, and no implied covenants or obligations shall be read into
          this Indenture against the Trustee; and

               (ii) in the absence of bad faith on the part of the Trustee, the
          Trustee may with respect to the Securities of such series conclusively
          rely, as to the truth of the statements and the correctness of the
          opinions expressed therein, upon any 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 that
          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 requirement of this
          Indenture;

          (2) the Trustee shall not be liable for any error of judgment made in
     good faith by a Responsible Officer or Responsible Officers of the Trustee,
     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 not less than a majority in principal amount of the
     Securities of any series at the time Outstanding 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 that series; and

          (4) None of the provisions contained in this Indenture shall require
     the Trustee to expend or risk its own funds or otherwise incur personal
     financial liability in the performance of any of its duties or in the
     exercise of any of its rights or powers, if there is reasonable ground for
     believing that the repayment of such funds or liability is not reasonably
     assured to it under the terms of this Indenture or adequate indemnity
     against such risk is not reasonably assured to it.

          SECTION 7.2.   CERTAIN RIGHTS OF TRUSTEE.

          Except as otherwise provided in Section 7.1:

          (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, consent, order, approval, bond, security or
other paper or document believed by it to be genuine and to have been signed or
presented by the proper party or parties;


                                      32







          (b) Any request, direction, order or demand of the Company mentioned
herein shall be sufficiently evidenced by a Board Resolution or an instrument
signed in the name of the Company by the President or any Vice President and by
the Secretary or an Assistant Secretary or the Treasurer or an Assistant
Treasurer thereof (unless other evidence in respect thereof is specifically
prescribed herein);

          (c) 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 or suffered or omitted hereunder
in good faith and in reliance thereon;

          (d) The Trustee shall be under no obligation to exercise any of the
rights or powers vested in it by this Indenture at the request, order or
direction of any of the Securityholders, pursuant to the provisions of this
Indenture, unless such Securityholders shall have offered to the Trustee
security or indemnity satisfactory to the Trustee against the costs, expenses
and liabilities that may be incurred therein or thereby; nothing contained
herein shall, however, relieve the Trustee of the obligation, upon the
occurrence of an Event of Default with respect to a series of the Securities
(that has not been cured or waived) to exercise with respect to Securities of
that series such of the rights and powers vested in it by this Indenture, and to
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;

          (e) The Trustee shall not be liable for any action taken or omitted to
be taken by it in good faith and believed by it to be authorized or within the
discretion or rights or powers conferred upon it by this Indenture;

          (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, consent, order, approval, bond, security, or
other papers or documents, unless requested in writing so to do by the holders
of not less than a majority in principal amount of the Outstanding Securities of
the particular series affected thereby (determined as provided in Section 8.4);
PROVIDED, HOWEVER, that if the payment within a reasonable time to the Trustee
of the costs, expenses or liabilities likely to be incurred by it in the making
of such investigation is, in the opinion of the Trustee, not reasonably assured
to the Trustee by the security afforded to it by the terms of this Indenture,
the Trustee may require reasonable indemnity against such costs, expenses or
liabilities as a condition to so proceeding.  The reasonable expense of every
such examination shall be paid by the Company or, if paid by the Trustee, shall
be repaid by the Company upon demand; and

          (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.


                                      33







          SECTION 7.3.   TRUSTEE NOT RESPONSIBLE FOR RECITALS OR ISSUANCE OR
                         SECURITIES.

          (a) The recitals contained herein and in the Securities shall be taken
as the statements of the Company and the Trustee assumes no responsibility for
the correctness of the same.

          (b) The Trustee makes no representations as to the validity or
sufficiency of this Indenture or of the Securities.

          (c) The Trustee shall not be accountable for the use or application by
the Company of any of the Securities or of the proceeds of such Securities, or
for the use or application of any moneys paid over by the Trustee in accordance
with any provision of this Indenture or established pursuant to Section 2.1, or
for the use or application of any moneys received by any paying agent other than
the Trustee.

          SECTION 7.4.   MAY HOLD SECURITIES.

          The Trustee or any paying agent or Security Registrar, in its
individual or any other capacity, may become the owner or pledgee of Securities
with the same rights it would have if it were not Trustee, paying agent or
Security Registrar.

          SECTION 7.5.   MONEYS HELD IN TRUST.

          Subject to the provisions of Section 11.5, all moneys received by the
Trustee shall, until used or applied as herein provided, be held in trust for
the purposes for which they were received, but need not be segregated from other
funds except to the extent required by law.  The Trustee shall be under no
liability for interest on any moneys received by it hereunder except such as it
may agree with the Company to pay thereon.

          SECTION 7.6.   COMPENSATION AND REIMBURSEMENT.

          (a) The Company covenants and agrees to pay to the Trustee, and the
Trustee shall be entitled to, such compensation (which shall not be limited by
any provision of law in regard to the compensation of a trustee of an express
trust), as the Company and the Trustee may from time to time agree in writing,
for all services rendered by it in the execution of the trusts hereby created
and in the exercise and performance of any of the powers and duties hereunder of
the Trustee, and, except as otherwise expressly provided herein, the Company
will pay or reimburse the Trustee upon its request for all reasonable expenses,
disbursements and advances incurred or made by the Trustee in accordance with
any of the provisions of this Indenture (including the reasonable compensation
and the expenses and disbursements of its counsel and of all Persons not
regularly in its employ) except any such expense, disbursement or advance as may
arise from its negligence or bad faith.  The Company also covenants to indemnify
the Trustee (and its officers, agents, directors and employees) for, and to hold
it harmless against, 


                                      34







any loss, liability or expense incurred without negligence or bad faith on the
part of the Trustee and arising out of or in connection with the acceptance or
administration of this trust, including the costs and expenses of defending 
itself against any claim of liability in the premises.

          (b) The obligations of the Company under this Section to compensate
and indemnify the Trustee and to pay or reimburse the Trustee for expenses,
disbursements and advances shall constitute additional indebtedness hereunder. 
Such additional indebtedness shall be secured by a lien prior to that of the
Securities upon all property and funds held or collected by the Trustee as such,
except funds held in trust for the benefit of the holders of particular
Securities.  If the Trustee incurs expenses or renders services after an Event
of Default occurs, the expenses and the compensation for the services are
intended to constitute expenses of administration under any bankruptcy or
insolvency law applicable to the Company.  

          SECTION 7.7.   RELIANCE ON OFFICERS' CERTIFICATE.

          Except as otherwise provided in Section 7.1, whenever in the
administration of the provisions of this Indenture the Trustee shall deem it
necessary or desirable that a matter be proved or established prior to taking or
suffering or omitting to take any action hereunder, such matter (unless other
evidence in respect thereof be herein specifically prescribed) may, in the
absence of negligence or bad faith on the part of the Trustee, be deemed to be
conclusively proved and established by an Officers' Certificate delivered to the
Trustee and such certificate, in the absence of negligence or bad faith on the
part of the Trustee, shall be full warrant to the Trustee for any action taken,
suffered or omitted to be taken by it under the provisions of this Indenture
upon the faith thereof.

          SECTION 7.8.   DISQUALIFICATION: CONFLICTING INTERESTS.

          If the Trustee has or shall acquire any "conflicting interest" within
the meaning of Section 310(b) of the Trust Indenture Act, the Trustee and the
Company shall in all respects comply with the provisions of Section 310(b) of
the Trust Indenture Act.

          SECTION 7.9.   CORPORATE TRUSTEE REQUIRED; ELIGIBILITY.

          There shall at all times be a Trustee with respect to the Securities
issued hereunder which shall at all times be a corporation organized and doing
business under the laws of the United States of America or any State or
Territory thereof or of the District of Columbia, or a corporation or other
Person permitted to act as trustee by the Commission, authorized under such laws
to exercise corporate trust powers, having a combined capital and surplus of at
least 50 million U.S. dollars ($50,000,000), and subject to supervision or
examination by Federal, State, Territorial, or District of Columbia authority. 
If such corporation publishes reports of condition at least annually, pursuant
to law or to the requirements of the aforesaid 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 combined capital and
surplus as set forth in its most recent report of condition so published.  The
Company may not, nor may any Person 


                                      35







directly or indirectly controlling, controlled by, or under common control with
the Company, serve as Trustee.  In case at any time the Trustee shall cease to 
be eligible in accordance with the provisions of this Section, the Trustee shall
resign immediately in the manner and with the effect specified in Section 7.10.

          SECTION 7.10.  RESIGNATION AND REMOVAL; APPOINTMENT OF SUCCESSOR.

          (a) The Trustee or any successor hereafter appointed, may at any time
resign with respect to the Securities of one or more series by giving written
notice thereof to the Company and by transmitting notice of resignation by mail,
first class postage prepaid, to the Securityholders of such series, as their
names and addresses appear upon the Security Register.  Upon receiving such
notice of resignation, the Company shall promptly appoint a successor trustee
with respect to Securities of such series by written instrument, in duplicate,
executed by order of the Board of Directors, one copy of which instrument shall
be delivered to the resigning Trustee and one copy to the successor trustee.  If
no successor trustee shall have been so appointed and have accepted appointment
within 30 days after the mailing 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 Securities of such series, or any
Securityholder of that series who has been a bona fide holder of a Security or
Securities for at least six months may, subject to the provisions of Section
6.8, on behalf of himself and all others similarly situated, petition any such
court for the appointment of a successor trustee.  Such court may thereupon
after such notice, if any, as it may deem proper and prescribe, appoint a
successor trustee.

          (b) In case at any time any one of the following shall occur:

          (1) the Trustee shall fail to comply with the provisions of Section
     7.8 after written request therefor by the Company or the Guarantor or by
     any Securityholder who has been a bona fide holder of a Security or
     Securities for at least six months; or

          (2) the Trustee shall cease to be eligible in accordance with the
     provisions of Section 7.9 and shall fail to resign after written request
     therefor by the Company or by any such Securityholder; or

          (3) the Trustee shall become incapable of acting, or shall be adjudged
     a bankrupt or insolvent, or commence a voluntary bankruptcy proceeding, or
     a receiver of the Trustee or of its property shall be appointed or
     consented to, 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, the Company may remove the Trustee with respect to all
Securities and appoint a successor trustee by written instrument, in duplicate,
executed by order of the Board of Directors, one copy of which instrument shall
be delivered to the Trustee so removed and one copy to the successor trustee,
or, subject to the provisions of Section 6.8, unless the Trustee's


                                      36







duty to resign is stayed as provided herein, any Securityholder who has been a
bona fide holder of a Security or Securities for at least six months may, on 
behalf of that holder and all others similarly situated, petition any court of
competent jurisdiction for the removal of the Trustee and the appointment of a
successor trustee.  Such court may thereupon after such notice, if any, as it 
may deem proper and prescribe, remove the Trustee and appoint a successor 
trustee.

          (c) The holders of a majority in aggregate principal amount of the
Securities of any series at the time Outstanding may at any time remove the
Trustee with respect to such series by so notifying the Trustee and the Company
and may appoint a successor Trustee for such series with the consent of the
Company.

          (d) Any resignation or removal of the Trustee and appointment of a
successor trustee with respect to the Securities of a series pursuant to any of
the provisions of this Section shall become effective upon acceptance of
appointment by the successor trustee as provided in Section 7.11.

          (e) Any successor trustee appointed pursuant to this Section may be
appointed with respect to the Securities of one or more series or all of such
series, and at any time there shall be only one Trustee with respect to the
Securities of any particular series.

          SECTION 7.11.  ACCEPTANCE OF APPOINTMENT BY SUCCESSOR.

          (a) In case of the appointment hereunder of a successor trustee with
respect to all Securities, 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, deed or conveyance, 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 its charges, 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
one or more 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)
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


                                      37







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 indenture shall 
constitute such Trustees co-trustees of the same trust, 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 that no 
Trustee shall be responsible for any act or failure to act on the part of any 
other Trustee hereunder; 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, such retiring Trustee shall 
with respect to the Securities of that or those series to which the appointment
of such successor trustee relates have no further responsibility for the 
exercise of rights and powers or for the performance of the duties and 
obligations vested in the Trustee under this Indenture, and each such successor
trustee, without any further act, deed or conveyance, 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 shall duly assign, transfer and deliver to such
successor trustee, to the extent contemplated by such supplemental indenture,
the 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 and all instruments for more fully and certainly vesting in and
confirming to such successor trustee all such rights, powers and trusts referred
to in paragraph (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.

          (e) Upon acceptance of appointment by a successor trustee as provided
in this Section, the Company shall transmit notice of the succession of such
trustee hereunder by mail, first class postage prepaid, to the Securityholders,
as their names and addresses appear upon the Security Register.  If the Company
fails to transmit such notice within ten days after acceptance of appointment by
the successor trustee, the successor trustee shall cause such notice to be
transmitted at the expense of the Company and the Guarantor.

     SECTION 7.12.  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 the corporate trust business of the Trustee, shall be
the successor of the Trustee hereunder, PROVIDED that such corporation shall be
qualified under the provisions of Section 7.8 and eligible under the provisions
of Section 7.9, without the execution or filing of any paper or any further act
on the part of any of the parties hereto, anything herein to the contrary
notwithstanding.  In case any Securities shall have been authenticated, but not
delivered, by the Trustee then in office, any 


                                      38







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 7.13.  PREFERENTIAL COLLECTION OF CLAIMS AGAINST THE COMPANY.

          The Trustee shall comply with Section 311(a) of the Trust Indenture
Act, excluding any creditor relationship described in Section 311(b) of the
Trust Indenture Act.  A Trustee who has resigned or been removed shall be
subject to Section 311(a) of the Trust Indenture Act to the extent included
therein.


                                  ARTICLE VIII.

                         CONCERNING THE SECURITYHOLDERS

          SECTION 8.1.   EVIDENCE OF ACTION BY SECURITYHOLDERS.

          Whenever in this Indenture it is provided that the holders of a
majority or specified percentage in aggregate principal amount of the Securities
of a particular series may take any action (including the making of any demand
or request, the giving of any notice, consent or waiver or the taking of any
other action), the fact that at the time of taking any such action the holders
of such majority or specified percentage of that series have joined therein may
be evidenced by any instrument or any number of instruments of similar tenor
executed by such holders of Securities of that series in Person or by agent or
proxy appointed in writing.

          If the Company shall solicit from the Securityholders of any series
any request, demand, authorization, direction, notice, consent, waiver or other
action, the Company may, at its option, as evidenced by an Officers'
Certificate, fix in advance a record date for such series for the determination
of Securityholders entitled to give such request, demand, authorization,
direction, notice, consent, waiver or other action, 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 action may be given
before or after the record date, but only the Securityholders of record at the
close of business on the record date shall be deemed to be Securityholders for
the purposes of determining whether Securityholders of the requisite proportion
of Outstanding Securities of that series have authorized or agreed or consented
to such request, demand, authorization, direction, notice, consent, waiver or
other action, and for that purpose the Outstanding Securities of that series
shall be computed as of the record date; PROVIDED, HOWEVER, that no such
authorization, agreement or consent by such Securityholders on the 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.


                                      39







          SECTION 8.2.   PROOF OF EXECUTION BY SECURITYHOLDERS.

          Subject to the provisions of Section 7.1, proof of the execution of
any instrument by a Securityholder (such proof will not require notarization) or
his agent or proxy and proof of the holding by any Person of any of the
Securities shall be sufficient if made in the following manner:

          (a) The fact and date of the execution by any such Person of any
instrument may be proved in any reasonable manner acceptable to the Trustee.

          (b) The ownership of Securities shall be proved by the Security
Register of such Securities or by a certificate of the Security Registrar
thereof.

          (c) The Trustee may require such additional proof of any matter
referred to in this Section as it shall deem necessary.

          SECTION 8.3.   WHO MAY BE DEEMED OWNERS.

          Prior to the due presentment for registration of transfer of any
Security, the Company, the Trustee, any paying agent and any Security Registrar
may deem and treat the Person in whose name such Security shall be registered
upon the books of the Company as the absolute owner of such Security (whether or
not such Security shall be overdue and notwithstanding any notice of ownership
or writing thereon made by anyone other than the Security Registrar) for the
purpose of receiving payment of or on account of the principal of, premium, if
any, and (subject to Section 2.3) interest on such Security and for all other
purposes; and neither the Company nor the Trustee nor any paying agent nor any
Security Registrar shall be affected by any notice to the contrary.

          SECTION 8.4.   CERTAIN SECURITIES OWNED BY COMPANY DISREGARDED.

          In determining whether the holders of the requisite aggregate
principal amount of Securities of a particular series have concurred in any
direction, consent of waiver under this Indenture, the Securities of that series
that are owned by the Company or any other obligor on the Securities of that
series or by any Person directly or indirectly controlling or controlled by or
under common control with the Company or any other obligor on the Securities of
that series shall be disregarded and deemed not to be Outstanding for the
purpose of any such determination, except that for the purpose of determining
whether the Trustee shall be protected in relying on any such direction, consent
or waiver, only Securities of such series that the Trustee actually knows are so
owned shall be so disregarded.  The Securities so owned that have been pledged
in good faith may be regarded as Outstanding for the purposes of this Section,
if the pledgee shall establish to the satisfaction of the Trustee the pledgee's
right so to act with respect to such Securities and that the pledgee is not a
Person directly or indirectly controlling or controlled by or under direct or
indirect common control with the Company or any such other 


                                      40







obligor.  In case of a dispute as to such right, any decision by the Trustee 
taken upon the advice of counsel shall be full protection to the Trustee.

          SECTION 8.5.   ACTIONS BINDING ON FUTURE
                         SECURITYHOLDERS.

          At any time prior to (but not after) the evidencing to the Trustee, as
provided in Section 8.1, of the taking of any action by the holders of the
majority or percentage in aggregate principal amount of the Securities of a
particular series specified in this Indenture in connection with such action,
any holder of a Security of that series that is shown by the evidence to be
included in the Securities the holders of which have consented to such action
may, by filing written notice with the Trustee, and upon proof of holding as
provided in Section 8.2, revoke such action so far as concerns such Security. 
Except as aforesaid any such action taken by the holder of any Security shall be
conclusive and binding upon such holder and upon all future holders and owners
of such Security, and of any Security issued in exchange therefor, on
registration of transfer thereof or in place thereof, irrespective of whether or
not any notation in regard thereto is made upon such Security.  Any action taken
by the holders of the majority or percentage in aggregate principal amount of
the Securities of a particular series specified in this Indenture in connection
with such action shall be conclusively binding upon the Company, the Trustee and
the holders of all the Securities of that series.


                                   ARTICLE IX.

                             SUPPLEMENTAL INDENTURES

          SECTION 9.1.   SUPPLEMENTAL INDENTURES WITHOUT THE
                         CONSENT OF SECURITYHOLDERS.

          In addition to any supplemental indenture otherwise authorized by this
Indenture, the Company and the Trustee may from time to time and at any time
enter into an indenture or indentures supplemental hereto (which shall conform
to the provisions of the Trust Indenture Act as then in effect), without the
consent of the Securityholders, for one or more of the following purposes:

          (a) to cure any ambiguity, defect, or inconsistency herein, in the
Securities of any series;

          (b) to comply with Article Ten;

          (c) to provide for uncertificated Securities in addition to or in
place of certificated Securities;


                                      41







          (d) to add to the covenants of the Company for the benefit of the
holders of all or any Series of Securities (and if such covenants are to be for
the benefit of less than all series of Securities, stating that such covenants
are expressly being included solely for the benefit of such series) or to
surrender any right or power herein conferred upon the Company; 

          (e) to add to, delete from, or revise the conditions, limitations, and
restrictions on the authorized amount, terms, or purposes of issue,
authentication, and delivery of Securities, as herein set forth;

          (f) to make any change that does not adversely affect the rights of
any Securityholder in any material respect; or

          (g) to provide for the issuance of and establish the form and terms
and conditions of the Securities of any series, to establish the form of any
certifications required to be furnished pursuant to the terms of this Indenture
or any series of Securities, or to add to the rights of the holders of any
series of Securities.

          The Trustee is hereby authorized to join with the Company in the
execution of any such supplemental indenture, and to make any further
appropriate agreements and stipulations that may be therein contained, but the
Trustee shall not be obligated to enter into any such supplemental indenture
that affects the Trustee's own rights, duties or immunities under this Indenture
or otherwise.

          Any supplemental indenture authorized by the provisions of this
Section may be executed by the Company and the Trustee without the consent of
the holders of any of the Securities at the time Outstanding, notwithstanding
any of the provisions of Section 9.2.

          SECTION 9.2.   SUPPLEMENTAL INDENTURES WITH CONSENT OF
                         SECURITYHOLDERS.

          With the consent (evidenced as provided in Section 8.1) of the holders
of not less than a majority in aggregate principal amount of the Securities of
each series affected by such supplemental indenture or indentures at the time
Outstanding, the Company, when authorized by Board Resolutions, and the Trustee
may from time to time and at any time enter into an indenture or indentures
supplemental hereto (which shall conform to the provisions of the Trust
Indenture Act as then in effect) for the purpose of adding any provisions to or
changing in any manner or eliminating any of the provisions of this Indenture or
of any supplemental indenture or of modifying in any manner not covered by
Section 9.1 the rights of the holders of the Securities of such series under
this Indenture; PROVIDED, HOWEVER, that no such supplemental indenture shall
without the consent of the holders of each Debenture then Outstanding and
affected thereby, (i) extend the fixed maturity of any Securities of any series,
or reduce the principal amount thereof, or reduce the rate or extend the time of
payment of interest thereon, or reduce any premium payable upon the redemption
thereof, without the consent of the holder of each Security so affected or (ii)
reduce the aforesaid percentage of Securities, the holders of which are required
to consent to any such supplemental indenture PROVIDED, FURTHER, that if the


                                      42







Debt Securities of such series are held by a Sierra Pacific Trust or a trustee
of such trust, such supplemental indenture shall not be effective until the
holders of a majority in liquidation preference of Trust Securities of the
applicable Trust shall have consented to such supplemental indenture; PROVIDED
FURTHER, that if the consent of the Holder of each Outstanding Debt Security is
required, such supplemental indenture shall not be effective until each holder
of the Trust Securities of the applicable Sierra Pacific Trust shall have
consented to such supplemental indenture.

          It shall not be necessary for the consent of the Securityholders of
any series affected thereby under this Section to approve the particular form of
any proposed supplemental indenture, but it shall be sufficient if such consent
shall approve the substance thereof.

          SECTION 9.3.   EFFECT OF SUPPLEMENTAL INDENTURES.

          Upon the execution of any supplemental indenture pursuant to the
provisions of this Article or of Section 10.1, this Indenture shall, with
respect to such series, be and be deemed to be modified and amended in
accordance therewith and the respective rights, limitations of rights,
obligations, duties and immunities under this Indenture of the Trustee, the
Company and the holders of Securities of the series affected thereby shall
thereafter be determined, exercised and enforced hereunder subject in all
respects to such modifications and amendments, and all the terms and conditions
of any such supplemental indenture shall be and be deemed to be part of the
terms and conditions of this Indenture for any and all purposes.

          SECTION 9.4.   SECURITIES AFFECTED BY SUPPLEMENTAL INDENTURES.

          Securities of any series, affected by a supplemental indenture,
authenticated and delivered after the execution of such supplemental indenture
pursuant to the provisions of this Article or of Section 10.1, may bear a
notation in form approved by the Company, provided such form meets the
requirements of any exchange upon which such series may be listed, as to any
matter provided for in such series may be listed, as to any matter provided for
in such supplemental indenture.  If the Company shall so determine, new
Securities of that series so modified as to conform, in the opinion of the Board
of Directors of the Company, to any modification of this Indenture contained in
any such supplemental indenture may be prepared by the Company, authenticated by
the Trustee and delivered in exchange for the Securities of that series then
Outstanding.

          SECTION 9.5.   EXECUTION OF SUPPLEMENTAL INDENTURES.

          Upon the request of the Company, accompanied by their Board
Resolutions authorizing the execution of any such supplemental indenture, and
upon the filing with the Trustee of evidence of the consent of Securityholders
required to consent thereto as aforesaid, the Trustee shall join with the
Company in the execution of such supplemental indenture unless such supplemental
indenture affects the Trustee's own rights, duties or immunities under this
Indenture or otherwise, in which case the Trustee may in its discretion but
shall not be obligated 


                                      43







to enter into such supplemental indenture.  The Trustee, subject to the 
provisions of Section 7.1, may receive an Opinion of Counsel as conclusive 
evidence that any supplemental indenture executed pursuant to this Article is 
authorized or permitted by, and conforms to, the terms of this Article and that
it is proper for the Trustee under the provisions of this Article to join in 
the execution thereof.

          Promptly after the execution by the Company and the Trustee of any
supplemental indenture pursuant to the provisions of this Section, the Company
shall transmit by mail, first class postage prepaid, a notice, setting forth in
general terms the substance of such supplemental indenture, to the
Securityholders of all series affected thereby as their names and addresses
appear upon the Security Register.  Any failure of the Company to mail such
notice, or any defect therein, shall not, however, in any way impair or affect
the validity of any such supplemental indenture.


                                   ARTICLE X.

                              SUCCESSOR CORPORATION

          SECTION 10.1.  COMPANY MAY CONSOLIDATE, ETC.

          Nothing contained in this Indenture or in any of the Securities shall
prevent any consolidation or merger of the Company with or into any other
corporation or corporations (whether or not affiliated with the Company, as the
case may be), or successive consolidations or mergers in which the Company, as
the case may be, or its successor or successors shall be a party or parties, or
shall prevent any sale, conveyance, transfer or other disposition of the
property of the Company, as the case may be, or its successor or successors as
an entirety, or substantially as an entirety, to any other corporation (whether
or not affiliated with the Company, as the case may be, or its successor or
successors) authorized to acquire and operate the same; PROVIDED, HOWEVER, the
Company hereby covenants and agree that, upon any such consolidation, merger,
sale, conveyance, transfer or other disposition, the due and punctual payment,
in the case of the Company, of the principal of (premium, if any) and interest
on all of the Debt Securities of all series in accordance with the terms of each
series, according to their tenor and the due and punctual performance and
observance of all the covenants and conditions of this Indenture with respect to
each series or established with respect to such series pursuant to Section 2.1
to be kept or performed by the Company as the case may be, shall be expressly
assumed, by supplemental indenture (which shall conform to the provisions of the
Trust Indenture Act, as then in effect) satisfactory in form to the Trustee
executed and delivered to the Trustee by the entity formed by such
consolidation, or into which the Company, as the case may be, shall have been
merged, or by the entity which shall have acquired such property.


                                      44







          SECTION 10.2.  SUCCESSOR CORPORATION SUBSTITUTED.

          (a) In case of any such consolidation, merger, sale, conveyance,
transfer or other disposition and upon the assumption by the successor
corporation, by supplemental indenture, executed and delivered to the Trustee
and satisfactory in form to the Trustee, of, in the case of the Company, the due
and punctual payment of the principal of, premium, if any, and interest on all
of the Debt Securities of all series Outstanding and the due and punctual
performance of all of the covenants and conditions of this Indenture or
established with respect to each series of the Securities pursuant to Section
2.1 to be performed by the Company, as the case may be, with respect to each
series, such successor corporation shall succeed to and be substituted for the
Company, as the case may be, with the same effect as if it had been named as the
Company, as the case may be, herein, and thereupon the predecessor corporation
shall be relieved of all obligations and covenants under this Indenture and the
Securities.

          (b) In case of any such consolidation, merger, sale, conveyance,
transfer or other disposition such changes in phraseology and form (but not in
substance) may be made in the Securities thereafter to be issued as may be
appropriate.

          (c) Nothing contained in this Indenture or in any of the Securities
shall prevent the Company from merging into itself or acquiring by purchase or
otherwise all or any part of the property of any other Person (whether or not
affiliated with the Company).

          SECTION 10.3.  EVIDENCE OF CONSOLIDATION, ETC. TO TRUSTEE.

          The Trustee, subject to the provisions of Section 7.1, may receive an
Opinion of Counsel as conclusive evidence that any such consolidation, merger,
sale, conveyance, transfer or other disposition, and any such assumption, comply
with the provisions of this Article.


                                   ARTICLE XI.

                           SATISFACTION AND DISCHARGE

          SECTION 11.1.  SATISFACTION AND DISCHARGE OF INDENTURE.

          If at any time: (a) the Company shall have delivered to the Trustee
for cancellation all Securities of a series theretofore authenticated (other
than any Securities that shall have been destroyed, lost or stolen and that
shall have been replaced or paid as provided in Section 2.7) and Securities for
whose payment money or Governmental Obligations have theretofore been deposited
in trust or segregated and held in trust by the Company (and thereupon repaid to
the Company or discharged from such trust, as provided in Section 11.5); or (b)
all such Securities of a particular series not theretofore delivered to the
Trustee for cancellation shall have become due and payable, or are by their
terms to become due and payable within one year or are to be called for
redemption within one year under arrangements satisfactory to the Trustee for
the


                                      45







giving of notice of redemption, and the Company shall deposit or cause to be
deposited with the Trustee as trust funds the entire amount in moneys or
Governmental Obligations sufficient or a combination thereof, sufficient in the
opinion of a nationally recognized firm of independent public accountants
expressed in a written certification thereof delivered to the Trustee, to pay at
maturity or upon redemption all Securities of that series not theretofore
delivered to the Trustee for cancellation, including principal (and premium, if
any) and interest due or to become due to such date of maturity or date fixed
for redemption, as the case may be, and if the Company shall also pay or cause
to be paid all other sums payable hereunder with respect to such series by the
Company; then this Indenture shall thereupon cease to be of further effect with
respect to such series except for the provisions of Sections 2.3, 2.5, 2.7, 4.1,
4.2, 4.3 and 7.10, that shall survive until the date of maturity or redemption
date, as the case may be, and Sections 7.6 and 11.5, that shall survive to such
date and thereafter, and the Trustee, on demand of the Company and at the cost
and expense of the Company, shall execute proper instruments acknowledging
satisfaction of and discharging this Indenture with respect to such series.

          SECTION 11.2.  DISCHARGE OF OBLIGATIONS.

          If at any time all such Securities of a particular series not
heretofore delivered to the Trustee for cancellation or that have not become due
and payable as described in Section 11.1 shall have been paid by the Company by
depositing irrevocably with the Trustee as trust funds moneys or an amount of
Governmental Obligations sufficient or a combination thereof, sufficient in the
opinion of a nationally recognized firm of independent public accountants
expressed in a written certification thereof delivered to the Trustee, to pay at
maturity or upon redemption all such Securities of that series not theretofore
delivered to the Trustee for cancellation, including principal (and premium, if
any) and interest due or to become due to such date of maturity or date fixed
for redemption, as the case may be, and if the Company shall also pay or cause
to be paid all other sums payable hereunder by the Company with respect to such
series, then after the date such moneys or Governmental Obligations, as the case
may be, are deposited with the Trustee the obligations of the Company under this
Indenture with respect to such series shall cease to be of further effect except
for the provisions of Sections 2.3, 2.5, 2.7, 4.1, 4.2, 4.3, 7.6, 7.10 and 11.5
hereof that shall survive until such Securities shall mature and be paid. 
Thereafter, Sections 7.6 and 11.5 shall survive.

          SECTION 11.3.  DEPOSITED MONEYS TO BE HELD IN TRUST.

          All moneys or Governmental Obligations deposited with the Trustee
pursuant to Sections 11.1 or 11.2 shall be held in trust and shall be available
for payment as due, either directly or through any paying agent (including the
Company acting as its own paying agent), to the holders of the particular series
of Securities for the payment or redemption of which such moneys or Governmental
Obligations have been deposited with the Trustee.


                                      46







          SECTION 11.4.  PAYMENT OF MONEYS HELD BY PAYING AGENTS.

          In connection with the satisfaction and discharge of this Indenture
all moneys or Governmental Obligations then held by any paying agent under the
provisions of this Indenture shall, upon demand of the Company, be paid to the
Trustee and thereupon such paying agent shall be released from all further
liability with respect to such moneys or Governmental Obligations.

          SECTION 11.5.  REPAYMENT TO COMPANY.

          Any moneys or Governmental Obligations deposited with any paying agent
or the Trustee, or then held by the Company in trust for payment of principal of
or premium or interest on the Securities of a particular series that are not
applied but remain unclaimed by the holders of such Securities for at least two
years after the date upon which the principal of (and premium, if any) or
interest on such Securities shall have respectively become due and payable,
shall be repaid to the Company, as the case may be, on May 31 of each year or
(if then held by the Company) shall be discharged from such trust; and thereupon
the paying agent and the Trustee shall be released from all further liability
with respect to such moneys or Governmental Obligations, and the holder of any
of the Securities entitled to receive such payment shall thereafter, as an
unsecured general creditor, look only to the Company or the Guarantor for the
payment thereof.


                                  ARTICLE XII.

                IMMUNITY OF INCORPORATORS, STOCKHOLDERS, OFFICERS
                                  AND DIRECTORS

          SECTION 12.1.  NO RECOURSE.

          No recourse under or upon any obligation, covenant or agreement of
this Indenture, or of any Security, or for any claim based thereon or otherwise
in respect thereof, shall be had against any incorporator, stockholder, officer
or director, past, present or future as such, of the Company or of any
predecessor or successor corporation, either directly or through the Company or
the Guarantor or any such predecessor or successor corporation, whether by
virtue of any constitution, statute or rule of law, or by the enforcement of any
assessment or penalty or otherwise; it being expressly understood that this
Indenture and the obligations issued hereunder are solely corporate obligations,
and that no such personal liability whatever shall attach to, or is or shall be
incurred by, the incorporators, stockholders, officers or directors as such, of
the Company or of any predecessor or successor corporation, or any of them,
because of the creation of the indebtedness hereby authorized, or under or by
reason of the obligations, covenants or agreements contained in this Indenture
or in any of the Securities or implied therefrom; and that any and all such
personal liability of every name and nature, either at common law or in equity
or by constitution or statute, of, and any and all such rights and claims
against, every such incorporator, stockholder, officer or director as such,
because of the creation of the

                                      47






indebtedness hereby authorized, or under or by reason of the obligations,
covenants or agreements contained in this Indenture or in any of the Securities
or implied therefrom, are hereby expressly waived and released as a condition 
of, and as a consideration for, the execution of this Indenture and the issuance
of such Securities.


                                  ARTICLE XIII.

                            MISCELLANEOUS PROVISIONS

          SECTION 13.1.  EFFECT ON SUCCESSORS AND ASSIGNS.

          All the covenants, stipulations, promises and agreements in this
Indenture contained by or on behalf of the Company shall bind their respective
successors and assigns, whether so expressed or not.

          SECTION 13.2.  ACTIONS BY SUCCESSOR.

          Any act or proceeding by any provision of this Indenture authorized or
required to be done or performed by any board, committee or officer of the
Company shall and may be done and performed with like force and effect by the
corresponding board, committee or officer of any corporation that shall at the
time be the lawful sole successor of the Company, as the case may be.

          SECTION 13.3.  SURRENDER OF COMPANY POWERS.

          The Company by instrument in writing executed by authority of 2/3
(two-thirds) of its Board of Directors and delivered to the Trustee may
surrender any of the powers reserved to the Company, and thereupon such power so
surrendered shall terminate both as to the Company, as the case may be, and as
to any successor corporation.

          SECTION 13.4.  NOTICES.

          Except as otherwise expressly provided herein any notice or demand
that by any provision of this Indenture is required or permitted to be given or
served by the Trustee or by the holders of Securities to or on the Company may
be given or served by being deposited first class postage prepaid in a post-
office letterbox addressed (until another address is filed in writing by the
Company with the Trustee), as follows: c/o Sierra Pacific Power Company, 6100
Neil Road (P.O. Box 10100), Reno, Nevada  89520, Attention: Treasurer.  Any
notice, election, request or demand by the Company or any Securityholder to or
upon the Trustee shall be deemed to have been sufficiently given or made, for
all purposes, if given or made in writing at the Corporate Trust Office of the
Trustee.


                                      48







          SECTION 13.5.  GOVERNING LAW.

          This Indenture and each Security shall be deemed to be a contract made
under the internal laws of the State of New York, and for all purposes shall be
construed in accordance with the laws of said State.

          SECTION 13.6.  TREATMENT OF DEBT SECURITIES AS DEBT.

          It is intended that the Debt Securities will be treated as
indebtedness and not as equity for federal income tax purposes.  The provisions
of this Indenture shall be interpreted to further this intention.

          SECTION 13.7.  COMPLIANCE CERTIFICATES AND OPINIONS.

          (a) Upon any application or demand by the Company to the Trustee to
take any action under any of the provisions of this Indenture, the Company shall
furnish to the Trustee an Officers' Certificate stating that all conditions
precedent 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 have been complied with, except that in
the case of any such application or demand as to which the furnishing of such
documents is specifically required by any provision of this Indenture relating
to such particular application or demand, no additional certificate or opinion
need be furnished.

          (b) Any certificate or opinion delivered to the Trustee with respect
to compliance with a condition or covenant in this Indenture shall include (1) a
statement that the Person making such certificate or opinion has read such
covenant or condition; (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
such Person, 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 such Person, such condition or covenant has been complied with.

          SECTION 13.8.  PAYMENTS ON BUSINESS DAYS.

          Except as provided pursuant to Section 2.1 pursuant to a Board
Resolution, and as set forth in an Officers' Certificate, or established in one
or more indentures supplemental to this Indenture, in any case where the date of
maturity of interest or principal of any Security or the date of redemption of
any Security shall not be a Business Day, then payment of interest or principal
(and premium, if any) may be made on the next succeeding Business Day with the
same force and effect as if made on the nominal date of maturity or redemption,
and no interest shall accrue for the period after such nominal date, except
that, if such Business Day is in the next succeeding calendar year, then such
payment shall be made on the immediately preceding Business Day, as if made on
the nominal date of maturity or redemption.


                                      49







          SECTION 13.9.  CONFLICT WITH TRUST INDENTURE ACT.

          If and to the extent that any provision of this Indenture limits,
qualifies or conflicts with the duties imposed by Sections 310 to 317,
inclusive, of the Trust Indenture Act, such imposed duties shall control.

          SECTION 13.10.  COUNTERPARTS.

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

          SECTION 13.11.  SEPARABILITY.

          In case any one or more of the provisions contained in this Indenture
or in the Securities of any series shall for any reason be held to be invalid,
illegal or unenforceable in any respect, such invalidity, illegality or
unenforceability shall not affect any other provisions of this Indenture or of
such Securities, but this Indenture and such Securities shall be construed as if
such invalid or illegal or unenforceable provision had never been contained
herein or therein.

          SECTION 13.12.  ASSIGNMENT.

          The Company will have the right at all times to assign any of its
rights or obligations under this Indenture to a direct or indirect wholly-owned
Subsidiary of the Company, PROVIDED that, in the event of any such assignment,
the Company will remain liable for all such obligations.  Subject to the
foregoing, the Indenture is binding upon and inures to the benefit of the
parties thereto and their respective successors and assigns.  This Indenture may
not otherwise be assigned by the parties thereto.

          SECTION 13.13.  ACKNOWLEDGEMENT OF RIGHTS.

          The Company acknowledges that, with respect to any Debt Securities
held by Sierra Pacific Trust or a trustee of such trust, if the Institutional
Trustee of such Trust fails to enforce its rights under this Indenture as the
holder of the series of Debt Securities held as the assets of such Sierra
Pacific Trust any holder of Preferred Securities may institute legal proceedings
directly against the Company to enforce such Institutional Trustee's rights
under this Indenture without first instituting any legal proceedings against
such Institutional Trustee or any other person or entity.


                                      50







                                  ARTICLE XIV.

                           SUBORDINATION OF SECURITIES

          SECTION 14.1.  AGREEMENT TO SUBORDINATE.

          The Company covenants and agrees, and each Holder of Debt Securities
issued hereunder by such Holder's acceptance thereof likewise covenants and
agrees, that all Debt Securities shall be issued subject to the provisions of
this Article XIV; and each Holder of a Debt Security, whether upon original
issue or upon transfer or assignment thereof, accepts and agrees to be bound by
such provisions.

          The payment by the Company of the principal of, premium, if any, and
interest on all Debt Securities issued hereunder shall, to the extent and in the
manner hereinafter set forth, be subordinated and junior in right of payment to
the prior payment in full of all Senior Indebtedness of the Company, whether
outstanding at the date of this Indenture or thereafter incurred.

          No provision of this Article XIV shall prevent the occurrence of any
default or Event of Default hereunder.

          SECTION 14.2.  DEFAULT ON SENIOR INDEBTEDNESS.

          In the event and during the continuation of any default by the Company
in the payment of principal, premium, interest or any other payment due on any
Senior Indebtedness of the Company, as the case may be, or in the event that the
maturity of any Senior Indebtedness of the Company, as the case may be, has been
accelerated because of a default, then, in either case, no payment shall be made
by the Company with respect to the principal (including redemption and sinking
fund payments) of, or premium, if any, or interest on the Debt Securities.

          In the event that, notwithstanding the foregoing, any payment shall be
received by the Trustee when such payment is prohibited by the preceding
paragraph of this Section 14.3, such payment shall be held in trust for the
benefit of, and shall be paid over or delivered to, the holders of Senior
Indebtedness or their respective representatives, or to the trustee or trustees
under any indenture pursuant to which any of such Senior Indebtedness may have
been issued, as their respective interests may appear, but only to the extent
that the holders of the Senior Indebtedness (or their representative or
representatives or a trustee) notify the Trustee in writing within 90 days of
such payment of the amounts then due and owing on the Senior Indebtedness and
only the amounts specified in such notice to the Trustee shall be paid to the
holders of Senior Indebtedness.


                                      51







          SECTION 14.3.  LIQUIDATION; DISSOLUTION; BANKRUPTCY.

          Upon any payment by the Company or distribution of assets of the
Company of any kind or character, whether in cash, property or securities, to
creditors upon any dissolution or winding-up or liquidation or reorganization of
the Company, whether voluntary or involuntary or in bankruptcy, insolvency,
receivership or other proceedings, all amounts due upon all Senior Indebtedness
of the Company shall first be paid in full, or payment thereof provided for in
money in accordance with its terms, before any payment is made by the Company on
account of the principal (and premium, if any) or interest on the Debt
Securities; and upon any such dissolution or winding-up or liquidation or
reorganization, any payment by the Company, or distribution of assets of the
Company of any kind or character, whether in cash, property or securities, to
which the Holders of the Debt Securities or the Trustee would be entitled to
receive from the Company, except for the provisions of this Article XIV, shall
be paid by the Company or by any receiver, trustee in bankruptcy, liquidating
trustee, agent or other Person making such payment or distribution, or by the
Holders of the Debt Securities or by the Trustee under the Indenture if received
by them or it, directly to the holders of Senior Indebtedness of the Company
(PRO RATA to such holders on the basis of the respective amounts of Senior
Indebtedness held by such holders, as calculated by the Company) or their
representative or representatives, or to the trustee or trustees under any
indenture pursuant to which any instruments evidencing such Senior Indebtedness
may have been issued, as their respective interests may appear, to the extent
necessary to pay such Senior Indebtedness in full, in money or money's worth,
after giving effect to any concurrent payment or distribution to or for the
holders of such Senior Indebtedness, before any payment or distribution is made
to the Holders of Debt Securities or to the Trustee. 

          In the event that, notwithstanding the foregoing, any payment or
distribution of assets of the Company of any kind or character, whether in cash,
property or securities, prohibited by the foregoing, shall be received by the
Trustee before all Senior Indebtedness of the Company is paid in full, or
provision is made for such payment in money in accordance with its terms, such
payment or distribution shall be held in trust for the benefit of and shall be
paid over or delivered to the holders of such Senior Indebtedness or their
representative or representatives, or to the trustee or trustees under any
indenture pursuant to which any instruments evidencing such Senior Indebtedness
may have been issued, and their respective interests may appear, as calculated
by the Company, for application to the payment of all Senior Indebtedness of the
Company, as the case may be, remaining unpaid to the extent necessary to pay
such Senior Indebtedness in full in money in accordance with its terms, after
giving effect to any concurrent payment or distribution to or for the benefit of
the holders of such Senior Indebtedness.

          For purposes of this Article XIV, the words "cash, property or
securities" shall not be deemed to include shares of stock of the Company as
reorganized or readjusted, or securities of the Company or any other corporation
provided for by a plan of reorganization or readjustment, the payment of which
is subordinated at least to the extent provided in this Article XIV with respect
to the Debt Securities to the payment of all Senior Indebtedness of the Company,
as the case may be, that may at the time be outstanding, provided that (i) such
Senior


                                      52







Indebtedness is assumed by the new corporation, if any, resulting from any such
reorganization or readjustment, and (ii) the rights of the holders of such 
Senior Indebtedness are not, without the consent of such holders, altered
by such reorganization or readjustment.  The consolidation of the Company with,
or the merger of the Company into, another corporation or the liquidation or
dissolution of the Company following the conveyance or transfer of its property
as an entirety, or substantially as an entirety, to another corporation upon the
terms and conditions provided for in Article X of the Indenture shall not be
deemed a dissolution, winding-up, liquidation or reorganization for the purposes
of this Section 14.3 if such other corporation shall, as a part of such
consolidation, merger, conveyance or transfer, comply with the conditions stated
in Article X of the Indenture.  Nothing in Section 14.2 or in this Section 14.3
shall apply to claims of, or payments to, the Trustee under or pursuant to
Section 7.6 of the Indenture.

          SECTION 14.4.  SUBROGATION.

          Subject to the payment in full of all Senior Indebtedness of the
Company, the rights of the Holders of the Debt Securities shall be subrogated to
the rights of the holders of such Senior Indebtedness to receive payments or
distributions of cash, property or securities of the Company, as the case may
be, applicable to such Senior Indebtedness until the principal of (and premium,
if any) and interest on the Debt Securities shall be paid in full; and, for the
purposes of such subrogation, no payments or distributions to the holders of
such Senior Indebtedness of any cash, property or securities to which the
Holders of the Debt Securities or the Trustee would be entitled except for the
provisions of this Article XIV, and no payment over pursuant to the provisions
of this Article XIV to or for the benefit of the holders of such Senior
Indebtedness by Holders of the Debt Securities or the Trustee, shall, as between
the Company, its creditors other than Holders of Senior Indebtedness of the
Company, and the holders of the Debt Securities, be deemed to be a payment by
the Company to or on account of such Senior Indebtedness.  It is understood that
the provisions of this Article XIV are and are intended solely for the purposes
of defining the relative rights of the Holders of the Debt Securities, on the
one hand, and the holders of such Senior Indebtedness on the other hand.

          Nothing contained in this Article XIV or elsewhere in the Indenture,
this First Supplemental Indenture or in the Debt Securities is intended to or
shall impair, as between the Company, its creditors other than the holders of
Senior Indebtedness of the Company, and the Holders of the Debt Securities, the
obligation of the Company, which is absolute and unconditional, to pay to the
Holders of the Debt Securities the principal of (and premium, if any) and
interest on the Debt Securities as and when the same shall become due and
payable in accordance with their terms, or is intended to or shall affect the
relative rights of the Holders of the Debt Securities and creditors of the
Company, as the case may be, other than the holders of Senior Indebtedness of
the Company, as the case may be, nor shall anything herein or therein prevent
the Trustee or the Holder of any Debt Security from exercising all remedies
otherwise permitted by applicable law upon default under the Indenture, subject
to the rights, if any, under this Article XIV of the holders of such Senior
Indebtedness in respect of cash, property or securities of the Company, as the
case may be, received upon the exercise of any such remedy.


                                      53







          Upon any payment or distribution of assets of the Company referred to
in this Article XIV, the Trustee, subject to the provisions of Section 7.1 of
the Indenture, and the Holders of the Debt Securities shall be entitled to
conclusively rely upon any order or decree made by any court of competent
jurisdiction in which such dissolution, winding-up, liquidation or
reorganization proceedings are pending, or a certificate of the receiver,
trustee in bankruptcy, liquidation trustee, agent or other Person making such
payment or distribution, delivered to the Trustee or to the Holders of the Debt
Securities, for the purposes of ascertaining the Persons entitled to participate
in such distribution, the holders of Senior Indebtedness and other indebtedness
of the Company, as the case may be, the amount thereof or payable thereon, the
amount or amounts paid or distributed thereon and all other facts pertinent
thereto or to this Article XIV.

          SECTION 14.5.  TRUSTEE TO EFFECTUATE SUBORDINATION.

          Each Holder of Debt Securities by such Holder's acceptance thereof
authorizes and directs the Trustee on such Holder's behalf to take such action
as may be necessary or appropriate to effectuate the subordination provided in
this Article XIV and appoints the Trustee such Holder's attorney-in-fact for any
and all such purposes.

          SECTION 14.6.  NOTICE BY THE COMPANY.

          The Company shall give prompt written notice to a Responsible Officer
of the Trustee of any fact known to the Company that would prohibit the making
of any payment of monies to or by the Trustee in respect of the Debt Securities
pursuant to the provisions of this Article XIV.  Notwithstanding the provisions
of this Article XIV or any other provision of the Indenture and this First
Supplemental Indenture, the Trustee shall not be charged with knowledge of the
existence of any facts that would prohibit the making of any payment of monies
to or by the Trustee in respect of the Debt Securities pursuant to the
provisions of this Article XIV, unless and until a Responsible Officer of the
Trustee shall have received written notice thereof from the Company or a holder
or holders of Senior Indebtedness or from any trustee therefor; and before the
receipt of any such written notice, the Trustee, subject to the provisions of
Section 7.1 of the Indenture, shall be entitled in all respects to assume that
no such facts exist; PROVIDED, HOWEVER, that if the Trustee shall not have
received the notice provided for in this Section 6.6 at least two Business Days
prior to the date upon which by the terms hereof any money may become payable
for any purpose (including, without limitation, the payment of the principal of
(or premium, if any) or interest on any Debenture), then, anything herein
contained to the contrary notwithstanding, the Trustee shall have full power and
authority to receive such money and to apply the same to the purposes for which
they were received, and shall not be affected by any notice to the contrary that
may be received by it within two Business Days prior to such date.

          The Trustee, subject to the provisions of Section 7.2 of the
Indenture, shall be entitled to conclusively rely on the delivery to it of a
written notice by a Person representing himself to be a holder of Senior
Indebtedness of the Company, as the case may be (or a trustee on behalf of such
holder), to establish that such notice has been given by a holder of such Senior
Indebtedness or a trustee on behalf of any such holder or holders.  In the event
that the Trustee 


                                      54







determines in good faith that further evidence is required with respect to the 
right of any Person as a holder of such Senior Indebtedness to participate in
any payment or distribution pursuant to this Article XIV, the Trustee may 
request such Person to furnish evidence to the reasonable satisfaction of the
Trustee as to the amount of such Senior Indebtedness held by such Person, the
extent to which such Person is entitled to participate in such payment or
distribution and any other facts pertinent to the rights of such Person under
this Article XIV, and, if such evidence is not furnished, the Trustee may defer
any payment to such Person pending judicial determination as to the right of
such Person to receive such payment.

          SECTION 14.7.  RIGHTS OF THE TRUSTEE; HOLDERS OF SENIOR INDEBTEDNESS.

          The Trustee in its individual capacity shall be entitled to all the
rights set forth in this Article XIV in respect of any Senior Indebtedness at
any time held by it, to the same extent as any other holder of Senior
Indebtedness, and nothing in this Indenture shall deprive the Trustee of any of
its rights as such holder.

          With respect to the holders of Senior Indebtedness of the Company, the
Trustee undertakes to perform or to observe only such of its covenants and
obligations as are specifically set forth in this Article XIV, and no implied
covenants or obligations with respect to the holders of such Senior Indebtedness
shall be read into the Indenture or this First Supplemental Indenture against
the Trustee.  The Trustee shall not be deemed to owe any fiduciary duty to the
holders of such Senior Indebtedness and, subject to the provisions of Section  
of the Indenture, the Trustee shall not be liable to any holder of such Senior
Indebtedness if it shall pay over or deliver to Holders of Debt Securities, the
Company or any other Person money or assets to which any holder of such Senior
Indebtedness shall be entitled by virtue of this Article XIV or otherwise.

          SECTION 14.8.  SUBORDINATION MAY NOT BE IMPAIRED.

          No right of any present or future holder of any Senior Indebtedness of
the Company to enforce subordination as herein provided shall at any time in any
way be prejudiced or impaired by any act or failure to act on the part of the
Company, as the case may be, or by any act or failure to act, in good faith, by
any such holder, or by any noncompliance by the Company, as the case may be,
with the terms, provisions and covenants of this Indenture, regardless of any
knowledge thereof that any such holder may have or otherwise be charged with.

          Without in any way limiting the generality of the foregoing paragraph,
the holders of Senior Indebtedness of the Company may, at any time and from time
to time, without the consent of or notice to the Trustee or the Holders of the
Debt Securities, without incurring responsibility to the Holders of the Debt
Securities and without impairing or releasing the subordination provided in this
Article XIV or the obligations hereunder of the Holders of the Debt Securities
to the holders of such Senior Indebtedness, do any one or more of the following:
(i) change the manner, place or terms of payment or extend the time of payment
of, or renew or alter, such Senior Indebtedness, or otherwise amend or
supplement in any manner such Senior Indebtedness or any instrument evidencing
the same or any agreement under which such Senior


                                      55







Indebtedness is outstanding; (ii) sell, exchange, release or otherwise deal with
any property pledged, mortgaged or otherwise securing such Senior Indebtedness;
(iii) release any Person liable in any manner for the collection of such Senior
Indebtedness; and (iv) exercise or refrain from exercising any rights against 
the Company, as the case may be, and any other Person.


            [The remainder of this page is left blank intentionally.]


                                      56







          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.


                                            SIERRA PACIFIC POWER COMPANY


                                            By_________________________________


Attest:



By_________________________________

                                            IBJ SCHRODER BANK & TRUST COMPANY
                                            AS TRUSTEE


                                            By_________________________________


Attest:



By_________________________________





                                      57







STATE OF            )
COUNTY OF           )  ss.:


     On the ____ day of ________________, 1996, before me personally came
__________________ to me known, who, being by me duly sworn, did depose and say
that he is the of Sierra Pacific Power Company, one of the corporations
described in and which executed the above instrument; that he knows the
corporate seal of said corporation; that the seal affixed to the said instrument
is such corporation 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.



                                               ________________________________
                                               NOTARY PUBLIC

[seal]                                         Commission expires



                                               ________________________________
                                               NOTARY PUBLIC

[seal]                                         Commission expires



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