EXHIBIT D























    Unless this certificate is presented by an authorized representative of The
Depository Trust Company, a New York corporation ("DTC"), to the Company or its
agent for registration of transfer, exchange, or payment, and any certificate
issued is registered in the name of Cede & Co. or in such other name as is
requested by an authorized representative of DTC (and any payment is made to
Cede & Co. or to such other entity as is requested by an authorized
representative of DTC), ANY TRANSFER, PLEDGE, OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL inasmuch as the registered owner
hereof, Cede & Co., has an interest herein.

REGISTERED                                              PRINCIPAL AMOUNT
No. FX __                  CUSIP No. ___________          $**_______**



                             SIERRA PACIFIC POWER COMPANY
                           COLLATERALIZED MEDIUM-TERM NOTE
                                       SERIES D
                                     (Fixed Rate)

ORIGINAL ISSUE DATE:       INTEREST RATE:               STATED MATURITY DATE:

      __/__/__                 ____%                          __/__/__



INTEREST PAYMENT DATES:    2/1   8/1



INITIAL REDEMPTION         INITIAL REDEMPTION             ANNUAL REDEMPTION
DATE:                         PERCENTAGE:               PERCENTAGE REDUCTION:

      __/__/__                _______%                        _______%





OPTIONAL REPAYMENT DATE(S):






DAY COUNT CONVENTION
[  ] 30/360 FOR THE PERIOD FROM                               TO  
[  ] ACTUAL/360 FOR THE PERIOD FROM                           TO
[  ] ACTUAL/ACTUAL FOR THE PERIOD FROM                        TO



ADDENDUM ATTACHED:                        ORIGINAL ISSUE DISCOUNT:
[  ] Yes                                  [  ] Yes
[  ] No                                   [  ] No
                                          Total Amount of OID:
                                          Yield to Maturity:
                                          Initial Accrual Period:



OTHER PROVISIONS:



    Sierra Pacific Power Company, a Nevada corporation ("Issuer" or the 
"Company," which terms include any successor corporation under the Indenture
hereinafter referred to), for value received, hereby promises to pay to CEDE &
CO., or registered assigns, the principal sum of **_________ MILLION DOLLARS**
on the Stated Maturity Date specified above (except to the extent redeemed or
repaid prior to the Stated Maturity Date), and to pay interest thereon at the
Interest Rate per annum specified above, until the principal hereof is paid or
duly made available for payment.  Reference herein to "this Note," "hereof,"
"herein" and comparable terms shall include an Addendum hereto if an Addendum 
is specified above.

    The Company will pay interest on each Interest Payment Date specified 
above, commencing on the first Interest Payment Date next succeeding the 
Original Issue Date specified above, and on the Stated Maturity Date or any 
Redemption Date or Optional Repayment Date (as defined below) (the date of 
each such Stated Maturity Date, Redemption Date and Optional Repayment Date 
and the date on which principal or an installment of principal is due 





and payable by declaration of acceleration pursuant to the Indenture being 
referred to hereinafter as a "Maturity" with respect to principal payable on 
such date); PROVIDED, HOWEVER, that if the Original Issue Date is between a 
Regular Record Date (as defined below) and the next succeeding Interest 
Payment Date, interest payments will commence on the second Interest Payment 
Date succeeding the Original Issue Date.  Except as provided above, interest 
payments will be made on the Interest Payment Dates shown above.  Unless 
otherwise specified above, the "Regular Record Date" shall be the date 15 
calendar days (whether or not a Business Day) prior to the applicable 
Interest Payment Date. Interest on this Note will accrue from and including 
the most recent Interest Payment Date to which interest has been paid or duly 
provided for or, if no interest has been paid, from the Original Issue Date 
specified above, to, but excluding such Interest Payment Date.  If the 
Maturity or an Interest Payment Date falls on a day which is not a Business 
Day as defined below, the payment due on such Maturity or Interest Payment 
Date will be paid on the next succeeding Business Day with the same force and 
effect as if made on such Maturity or Interest Payment Date, as the case may 
be, and no interest shall accrue with respect to such payment for the period 
from and after such Maturity or Interest Payment Date.  The interest so 
payable and punctually paid or duly provided for on any Interest Payment Date 
will as provided in the Indenture be paid to the Person in whose name this 
Note (or one or more Predecessor Securities) is registered at the close of 
business on the Regular Record Date for such Interest Payment Date.  Any such 
interest which is payable, but not punctually paid or duly provided for on 
any Interest Payment Date (herein called "Defaulted Interest"), shall 
forthwith cease to be payable to the registered Holder on such Regular Record 
Date, and may be paid to the Person in whose name this Note (or one or more 
Predecessor Securities) is registered at the close of business on a Special 
Record Date for the payment of such Defaulted Interest to be fixed by the 
Trustee, notice whereof shall be given to the Holder of this Note not less 
than 10 days prior to such Special Record Date, or may be paid at any time in 
any other lawful manner, all as more fully provided in the Indenture.

    Payment of the principal of and interest on this Note will be made at the 
Office or Agency of the Company maintained by the Company for such purposes, 
in such coin or currency of the United States of America as at the time of 
payment is legal tender for payment of public and private debts; PROVIDED, 
HOWEVER, that at the option of the Company, payment of interest may be made 
by check mailed to the address of the Person entitled thereto as such address 
shall appear in the Security Register; and PROVIDED, FURTHER, that AT THE 
OPTION OF THE COMPANY, the Holder of this Note may be entitled to receive 
payments of principal of and interest on this Note by wire transfer of 
immediately available funds if appropriate wire transfer instructions have been





received by the Trustee not less than 15 days prior to the applicable payment 
date.

    Unless the certificate of authentication hereon has been executed by or 
on behalf of Bankers Trust Company, the Trustee for this Note under the 
Indenture, or its successor thereunder, by the manual signature of one of its 
authorized officers, this Note shall not be entitled to any benefit under the 
Indenture or be valid or obligatory for any purpose.

            This Note is one of a duly authorized series of Securities 
(hereinafter called the "Securities") of the Company designated as its 
Collateralized Medium-Term Notes (the "Notes").  The Notes are issued and to 
be issued under a Collateral Trust Indenture dated as of June 1, 1992, as 
amended and supplemented by the Fourth Supplemental Indenture dated as of 
February 1, 1997 (herein called the "Indenture") between the Company and 
Bankers Trust Company, to which Indenture and all indentures supplemental 
thereto reference is hereby made for a statement of the respective rights 
thereunder of the Company, the Trustee (as defined below) and the Holders of 
the Notes and the terms upon which the Notes are to be authenticated and 
delivered.  Bankers Trust Company shall act as Trustee with respect to the 
Notes (herein called the "Trustee," which term includes any successor Trustee 
with respect to the Notes, under the Indenture).  The terms of individual 
Notes may vary with respect to interest rates or interest rate formulas, 
issue dates, maturity, redemption, repayment, currency or payment and 
otherwise.

    Except as otherwise provided in the Indenture, the Notes will be issued 
in global form only registered in the name of The Depository Trust Company 
(the "Depositary") or its nominee.  The Notes will not be issued in 
definitive form, except as otherwise provided in the Indenture, and ownership 
of the Notes shall be maintained in book entry form by the Depositary for the 
accounts of participating organizations of the Depositary.

    This Note is not subject to any sinking fund and, unless otherwise 
provided above in accordance with the provisions of the following paragraphs, 
is not redeemable or repayable prior to the Stated Maturity Date.

    If so provided above, this Note may be redeemed by the Company on any 
date on and after the Initial Redemption Date, if any, specified above.  If 
no Initial Redemption Date is set forth above, this Note may not be redeemed 
prior to the Stated Maturity Date.  On and after the Initial Redemption Date, 
if any, this Note may be redeemed at any time in whole or from time to time 
in part in increments of $1,000 (provided that any remaining principal hereof 
shall be at least $1,000) at the option of the Company at the applicable 
Redemption Price (as defined below), together with accrued interest hereon at 
the applicable rate 





payable to the date of redemption (each such date, a  "Redemption Date"), on 
written notice given not more than 60 nor less than 30 days prior to the 
Redemption Date.  In the event of redemption of this Note in part only, a new 
Note for the unredeemed portion hereof shall be issued in the name of the 
Holder hereof upon the surrender hereof.

    Unless otherwise specified above, the "Redemption Price" shall initially 
be the Initial Redemption Percentage, specified above, of the principal 
amount of this Note to be redeemed and shall decline at each anniversary of 
the Initial Redemption Date, shown above, by the Annual Redemption Percentage 
Reduction, if any, specified above hereof, of the principal amount to be 
redeemed until the Redemption Price is 100% of such principal amount.

    This Note may be subject to repayment at the option of the Holder on any 
Optional Repayment Date(s), if any, indicated above.  If no Optional 
Repayment Date(s) are set forth above, this Note may not be so repaid at the 
option of the Holder hereof prior to the Stated Maturity Date.  On any 
Optional Repayment Date, this Note shall be repayable in whole or in part in 
increments of $1,000 (provided that any remaining principal hereof shall be 
at least $1,000) at the option of the Holder hereof at a repayment price 
equal to 100% of the principal amount to be repaid, together with interest 
thereon payable to the date of repayment.  For this Note to be repaid in 
whole or in part at the option of the Holder hereof, this Note must be 
received, with the form entitled "Option to Elect Repayment" below duly 
completed, by the Trustee at its Corporate Trust Office, or such address 
which the Company shall from time to time notify the Holders of the Notes, 
not more than 60 nor less than 30 days prior to the related Option Repayment 
Date.  Exercise of such repayment option by the Holder hereof shall be 
irrevocable.

    Interest payments on this Note shall include interest accrued from, and 
including, the Original Issue Date indicated above, or the most recent date to 
which interest has been paid or duly provided for, to, but excluding, the 
related Interest Payment Date or Maturity, as the case may be.  Interest 
payments for this Note shall be computed and paid on the basis of a 360-day 
year of twelve 30-day months if the Day Count Convention specified above is 
"30/360" for the period specified thereunder, on the basis of the actual number 
of days in the related month and a 360-day year if the Day Count Convention 
specified above is "Actual/360" for the period specified thereunder or on the 
basis of the actual number of days in the related year and month if the Day 
Count Convention specified above is "Actual/Actual" for the period specified 
thereunder.

    As used herein, "Business Day" means each Monday, Tuesday, Wednesday, 
Thursday and Friday which is not a day on which 





banking institutions in The City of New York are authorized or obligated by 
or pursuant to law or executive order to close.

    Any provision contained herein with respect to the calculation of the 
rate of interest applicable to this Note, its payment dates or any other 
matter relating hereto may be modified as specified in an Addendum relating 
hereto if so specified above.

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

    The Indenture permits, with certain exceptions as therein provided, the 
amendment thereof and the modification of the rights and obligations of the 
Company and the Rights of the Holders of the Securities of each series to be 
affected thereby at any time by the Company and the Trustee with the consent 
of the Holders of 66 2/3% in aggregate principal amount of the Outstanding 
Securities of each series affected thereby.  The Indenture also contains 
provisions permitting the Holders of specified percentages in aggregate 
principal amount of the Securities of each series at the time Outstanding, on 
behalf of the Holders of all the Securities of such series, to waive 
compliance by the Company with certain provisions of the Indenture and 
certain past defaults under the Indenture and their consequences.  Any such 
consent or waiver by the Holder of this Note shall be conclusive and binding 
upon such Holder and upon all future Holders of this Note and of any Note 
issued upon the registration of transfer hereof or in exchange herefor or in 
lieu hereof whether or not notation of such consent or waiver is made upon 
this Note.

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

    As provided in the Indenture and subject to certain limitations therein 
set forth, the transfer of this Note may be registered on the Security 
Register of the Company, upon surrender of this Note for registration of 
transfer at the office or agency of the Company in the Borough of Manhattan, 
The City of New York, duly endorsed by, or accompanied by a written 
instrument of transfer in form satisfactory to the Company and the Security 
Registrar duly elected by, the Holder hereof or by its attorney duly 
authorized in writing, and thereupon one or more new Notes of authorized 
denominations and for the same aggregate principal amount, will be issued to 
the designated transferee or transferees.





    Upon initial sale, the Notes are issuable only in registered form without 
coupons in denominations of $10,000 and integral multiples of $1,000 in 
excess thereof.  Thereafter, the Notes may be transferred or exchanged, in 
accordance with the terms of the Indenture, for Notes in integral multiples 
of $1,000.  As provided in the Indenture and subject to certain limitations 
therein set forth, the Notes are exchangeable for a like aggregate principal 
amount of Notes as requested by the Holder surrendering the same.

    No service charge shall be made for any such registration of transfer or 
exchange, but the Company may require payment of a sum sufficient to cover 
any tax or other governmental charge payable in connection therewith.

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

    The Indenture and the Notes shall be governed by and construed in 
accordance with the laws of the State of New York.

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





    IN WITNESS WHEREOF, the Company has caused this instrument to be duly 
executed, manually or in facsimile, and an imprint or facsimile of its 
corporate seal to be imprinted hereon.

                                       SIERRA PACIFIC POWER COMPANY



                                       By:                          
                                          --------------------------
                                          Assistant Treasurer

Attest:


By:                      
   ----------------------
   Secretary



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

BANKERS TRUST COMPANY,
  as Trustee


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





                              OPTION TO ELECT REPAYMENT

    The undersigned hereby irrevocably request(s) and instruct(s) the Company 
to repay this Note (or portion thereof specified below) pursuant to its terms 
at a price equal to the principal amount hereof together with interest to the 
repayment date, to the undersigned, at________________________________________

______________________________________________________________________________
(Please print or typewrite name and address of the undersigned)

    For this Note to be repaid, the Trustee must receive at its Corporate 
Trust Office, or at such other place or places of which the Company shall from 
time to time notify the Holder of this Note, not more than 60 nor less than 30 
days prior to an Optional Repayment Date, if any, shown on the face of this 
Note, this Note with this "Option to Elect Repayment" form duly completed.

    If less than the entire principal amount of this Note is to be repaid, 
specify the portion hereof (which shall be increments of $1,000) which the 
Holder elects to have repaid and specify the denomination or denominations 
(which shall be $1,000 or an integral multiple thereof) of the Notes to be 
issued to the Holder for the portion of this Note not being repaid (in the 
absence of any such specification, one such Note will be issued for the portion
not being repaid).


$_______________________     ___________________________________

                             NOTICE:  The signature on this 
                             Option to Elect Repayment must
Date:___________________     correspond with the name as written
                             upon the face of this Note in every
                             particular, without alteration or
                             enlargement or any change
                             whatsoever.





                             ASSIGNMENT/TRANSFER FORM


    FOR VALUE RECEIVED the undersigned registered Holder hereby sell(s), 
assign(s) and transfer(s) unto________________________________________________

(insert Taxpayer Identification No.)__________________________________________

______________________________________________________________________________
                (Please print or typewrite name and address including
                             postal zip code of assignee)
                                                                 
______________________________________________________________________________
the within Note and all rights thereunder, hereby irrevocably constituting and

appointing____________________________________________________________________
attorney to transfer said Note on the books of the Company with full power of
substitution in the premises.


Date:_______________________      ____________________________________________

     NOTICE:  The signature of the registered Holder to this assignment
     must correspond with the name as written upon the face of the
     within instrument in every particular, without alteration or
     enlargement or any change whatsoever.





                                    ABBREVIATIONS

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

    TEN COM--as tenants in common

    UNIF GIFT MIN ACT--.........................Custodian.....................
                                (Cust.)                      (Minor)

                          Under Uniform Gifts to Minors Act

                          .................................
                                       (State)

    TEN ENT--as tenants by the entireties

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

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