Exhibit 10(Y)

                     TRANSITIONAL POWER PURCHASE AGREEMENT

                                BY AND BETWEEN

                         SIERRA PACIFIC POWER COMPANY

                                      AND

                           WPS NORTHERN NEVADA, LLC

DATED:  OCTOBER 25, 2000

ASSET BUNDLE:  TRACY/PINON


                               TABLE OF CONTENTS

Section                                                                     Page
- -------                                                                     ----

 1.   DEFINITIONS..............................................................1
 2.   TERM.....................................................................8
 3.   SECURITY.................................................................9
 4.   SUPPLY SERVICE..........................................................10
 5.   NOTIFICATION............................................................14
 6.   PRICING OF ENERGY AND ANCILLARY SERVICES................................15
 7.   INVOICING AND PAYMENTS..................................................16
 8.   REGULATORY APPROVALS....................................................19
 9.   COMPLIANCE..............................................................20
10.   INDEMNIFICATION.........................................................20
11.   LIMITATION OF LIABILITY.................................................22
12.   FORCE MAJEURE...........................................................22
13.   DISPUTES................................................................24
14.   NATURE OF OBLIGATIONS...................................................27
15.   SUCCESSORS AND ASSIGNS..................................................27
16.   REPRESENTATIONS.........................................................28
17.   DEFAULT AND REMEDIES....................................................29
18.   FACILITY ADDITIONS AND MODIFICATIONS....................................30
19.   COORDINATION............................................................30
20.   EMERGENCY AND NONEMERGENCY CONDITION RESPONSE...........................30
21.   OUTAGE SCHEDULING.......................................................31
22.   REPORTS.................................................................32
23.   COMMUNICATIONS..........................................................32
24.   NOTICES.................................................................33
25.   MERGER..................................................................33
26.   HEADINGS................................................................34
27.   COUNTERPARTS AND INTERPRETATION.........................................34
28.   SEVERABILITY............................................................34
29.   WAIVERS.................................................................34
30.   AMENDMENTS..............................................................35
31.   TIME IS OF THE ESSENCE..................................................35
32.   APPROVALS...............................................................35
33.   PLR SERVICE.............................................................36
34.   CONFIDENTIALITY.........................................................36
35.   CHOICE OF LAW...........................................................37



Exhibits                                                                         Page
- --------                                                                         ----
                                                                            
EXHIBIT A    ASSET BUNDLE CAPACITIES AND OPERATING PARAMETERS.....................A-1
EXHIBIT B    PRICE FLOOR OF ENERGY, PRICE CEILING OF ENERGY, AND PRICE OF
             ANCILLARY SERVICES...................................................B-1
EXHIBIT C    SUPPLIER'S MONTHLY INVOICE...........................................C-1
EXHIBIT D    BUYER'S MONTHLY INVOICE - REPLACEMENT COSTS..........................D-1
EXHIBIT E    YEAR END TRUE-UP INVOICE.............................................E-1
EXHIBIT F    NOTICES, BILLING AND PAYMENT INSTRUCTIONS............................F-1
EXHIBIT G    FORM OF AVAILABILITY NOTICE..........................................G-1
EXHIBIT H    FORM OF GUARANTEE....................................................H-1
EXHIBIT I    COMPANY OBSERVED HOLIDAYS............................................I-1
EXHIBIT J    ADJUSTMENTS TO TPPA AMOUNT...........................................J-1
EXHIBIT K    ADJUSTMENTS TO MINIMUM ANNUAL TAKE...................................K-1
EXHIBIT L    ENERGY APPLICABLE TO MINIMUM ANNUAL TAKE.............................L-1
EXHIBIT M    ASSET BUNDLE CONTRACTUAL AND OPERATIONAL CONSTRAINTS.................M-1



                     TRANSITIONAL POWER PURCHASE AGREEMENT

This Agreement is made and entered into as of October 25, 2000 by and between
Sierra Pacific Power Company, a Nevada corporation ("Buyer"), and WPS Northern
Nevada, LLC, a Nevada limited liability company (the "Supplier"). Buyer and
Supplier are referred to individually as a "Party" and collectively as the
"Parties."

WITNESSETH:

WHEREAS, Buyer is selling its Tracy/Pinon generating station and other assets
associated therewith to Supplier (the "Asset Sale");

WHEREAS, notwithstanding the Asset Sale, Buyer expects that it has been
designated as the Provider of Last Resort ("PLR") for its Nevada retail electric
customers who are unable to obtain electric service from an alternative seller
or who fail to select an alternative seller. The load required to serve such
customers, plus the customers under those wholesale sales agreements existing at
the Effective Date, is referred to herein as Buyer's Transitional Resource
Requirement; and

WHEREAS, as a result of the Asset Sale, Buyer will no longer have its interest
in the Tracy/Pinon generating station as a source of supply for its Transitional
Resource Requirement; and

WHEREAS, Supplier has or is willing to secure the necessary resources to provide
a portion of Buyer's Transitional Resource Requirement; and

WHEREAS, Buyer desires to purchase from Supplier and Supplier desires to sell
Energy and Ancillary Services under contract to Buyer; and

NOW, THEREFORE, in consideration of the mutual covenants, representations and
agreements hereinafter set forth, and intending to be legally bound hereby, the
Parties agree as follows:


1.   DEFINITIONS

     1.1  Format.

          1.1.1  References to Articles and Sections herein are cross-references
                 to Articles and Sections, respectively, in this Agreement,
                 unless otherwise stated.

          1.1.2  Any parts of this Agreement which are incorporated by reference
                 shall have the same meaning as if set forth in full text
                 herein.

                                       2


     1.2  Definitions. As used in this Agreement, the following terms shall have
          -----------
          the meanings set forth below:

          1.2.1  "Agreement" means this Agreement together with the Exhibits
                  ---------
                 attached hereto, as such may be amended from time to time.

          1.2.2  "Adjusted Replacement Cost of Energy" means the Replacement
                  -----------------------------------
                 Cost of Energy that will be due from Supplier after true-up in
                 accordance with the provisions of Section 7.5. Example
                 determinations of the Adjusted Replacement Cost of Energy are
                 shown on Exhibit E.

          1.2.3  "Ancillary Services" means those capacity-related services as
                  ------------------
                 listed in Exhibit B as well as the Energy component of such
                 services. These services are defined in Buyer's OATT.

          1.2.4  "Asset Bundle" means the Tracy/Pinon generating station(s) and
                  ------------
                 other assets associated therewith pursuant to the terms of the
                 Asset Sale Agreement.

          1.2.5  "Asset Bundle Capacity" means, with respect to each unit listed
                  ---------------------
                 in Exhibit A, the net generating capacity (in megawatts ("MW"))
                 of such unit, as modified from time to time in accordance with
                 Section 5.2, Section 20, and Section 21, and not to exceed at
                 any time the net capacity for each unit listed in Exhibit A.
                 Asset Bundle Capacity shall also mean, as the context requires,
                 the Energy (in megawatt-hours ("MWh")) and the Ancillary
                 Services which the units would be capable of producing if they
                 operated at the capacity level described in the first sentence
                 of this Section 1.2.6.

          1.2.6  "Asset Sale" has the meaning set forth in the Recitals.
                  ----------

          1.2.7  "Asset Sale Agreement" means the Asset Sale Agreement between
                  --------------------
                 Buyer and Supplier, dated as of October 25, 2000, to purchase
                 Buyer's Asset Bundle.

          1.2.8  "Asset Sale Closing" means the transfer of Buyer's ownership of
                  ------------------
                 the Asset Bundle through the consummation of the Asset Sale
                 pursuant to the terms of the Asset Sale Agreement.

          1.2.9  "Average Cost of Delivered Energy" means the total cost of
                  --------------------------------
                 Delivered Energy for the Contract Year after the application of
                 the annual true-up mechanism from Section 7.5 divided by the
                 total Delivered Energy for the Contract Year. Example
                 determinations of Average Cost of Delivered Energy are shown on
                 Exhibit E.

          1.2.10 "Availability Notice" means a notice delivered from time to
                  -------------------
                 time by Supplier to Buyer pursuant to Section 5.2 notifying
                 Buyer of changes in the availability of the Asset Bundle.

                                       3


          1.2.11 "Business Day" means any day other than Saturday, Sunday, and
                  ------------
                 any day that is an observed holiday by Buyer as shown on
                 Exhibit I.

          1.2.12 "Buyer's OATT" means Buyer's then-effective Open Access
                  ------------
                 Transmission Tariff, as it may be amended, which has been
                 accepted for filing by the FERC.

          1.2.13 "CALPX" means the California Power Exchange and any successor
                  -----
                 entity thereto.

          1.2.14 "Confidential Information" has the meaning set forth in Section
                  ------------------------
                 34.

          1.2.15 "Contract Year" means, with respect to the first Contract Year,
                  -------------
                 the period beginning on the Effective Date and, with respect to
                 each subsequent Contract Year, the period immediately following
                 the end of the preceding Contract Year, and in each case ending
                 on the earlier of the date which is twelve (12) months
                 thereafter or the termination date of this Agreement, as
                 provided in Section 2.1.

          1.2.16 "Control Area" has the meaning set forth in Buyer's OATT.
                  ------------

          1.2.17 "Control Area Operator" means an entity or organization, and
                  ---------------------
                 its representatives, which is responsible for operating and
                 maintaining the reliability of the electric power system(s)
                 within the Buyer's Control Area. The Control Area Operator is
                 also referred to as the transmission operator.

          1.2.18 "Credit Amount" shall mean an amount initially equal to $200
                  -------------
                 million, as decreased on a periodic basis in accordance with
                 Exhibit J.

          1.2.19 "Delivered Amount" means, with respect to any Dispatch Hour,
                  ----------------
                 the Energy delivered by Supplier to Buyer at the designated
                 Point(s) of Delivery during such Dispatch Hour, whether or not
                 such Energy was generated by the Asset Bundle, plus any
                 additional amounts pursuant to Section 4.1.2, Section 4.1.3 and
                 the Ancillary Services provided by Supplier for Buyer during
                 any Dispatch Hour pursuant to the terms of this Agreement.

          1.2.20 "Derating" means a reduction to the Asset Bundle Capacity.
                  --------

          1.2.21 "Dispatch Hour" means the prescribed hour(s) when Energy is to
                  -------------
                 be delivered by Supplier to Buyer at the designated Point(s) of
                 Delivery and the prescribed hour(s) when Ancillary Services are
                 to be provided to the ISA by Supplier on behalf of Buyer.

                                       4


          1.2.22 "EDU" means electric distribution utility, the organization
                  ---
                 with the responsibility for the distribution of energy over
                 Buyer's distribution system to retail end-users.

          1.2.23 "Effective Date" means the date that this Agreement becomes
                  --------------
                 effective, which shall be the date on which the Closing Date,
                 as defined in the Asset Sale Agreement, actually occurs;
                 provided, however, that the Effective Date shall not occur
                 until the FERC has accepted this Agreement or, if modifications
                 to this Agreement are required pursuant to Section 2.2.2, the
                 FERC has accepted the modified Agreement for filing.

          1.2.24 "Emergency Condition" shall mean a public declaration by the
                  -------------------
                 ISA or Control Area Operator that the Control Area is in danger
                 of imminent voltage collapse or uncontrollable cascading
                 outages.

          1.2.25 "Energy" means electricity (measured in MWh) and associated
                  ------
                 power-producing capacity to be provided by Supplier to Buyer
                 pursuant to this Agreement. Also known as "firm energy and
                 associated firm capacity".

          1.2.26 "Event of Default" has the meaning set forth in Section 17
                  ----------------
                 hereof.

          1.2.27 "FERC" means the Federal Energy Regulatory Commission and any
                  ----
                 successor agency thereto.

          1.2.28 "Force Majeure" has the meaning set forth in Section 12 hereof.
                  -------------

          1.2.29 "GAAP" means Generally Accepted Accounting Principles for the
                  ----
                 United States.

          1.2.30 "Good Utility Practice" means the applicable practices,
                  ---------------------
                 methods, and acts:

                 (i)     required by applicable Laws, applicable permits,
                         applicable reliability criteria, whether or not
                         the Party whose conduct at issue is a member
                         thereof, and

                 (ii)    otherwise engaged in or approved by a
                         significant portion of the United States
                         electric utility industry during the relevant
                         time period, which, in the exercise of
                         reasonable judgement in light of the facts known
                         at the time the decision was made, could have
                         been expected to accomplish the desired result
                         at a reasonable cost consistent with applicable
                         Laws, applicable permits, applicable reliability
                         criteria, good business practices, safety,
                         environmental protection, economy and
                         expediency. Good Utility Practice is not
                         intended to be limited to the optimum practice,
                         method or act to the exclusion of all others,
                         but rather to practices, methods or acts
                         generally accepted by the United States electric
                         utility industry.

                                       5


          1.2.31 "Governmental Authority" means any foreign, federal, state,
                  ----------------------
                 local, tribal or other governmental, regulatory or
                 administrative agency, court, commission, department, board, or
                 other governmental subdivision, legislature, rulemaking board,
                 tribunal, arbitrating body, or other governmental authority.

          1.2.32 "Gross Replacement Costs of Energy" means Buyer's Replacement
                  ---------------------------------
                 Cost of Energy prior to adjustment for the amount that Buyer
                 would have paid for the Energy if Supplier had delivered the
                 Energy to Buyer. Example determinations of Gross Replacement
                 Costs of Energy are shown on Exhibit D.

          1.2.33 "Guarantee" has the meaning set forth in Section 3.1.2 hereof.
                  ---------

          1.2.34 "Guarantor" has the meaning set forth in Section 3.1.2 hereof.
                  ---------

          1.2.35 "Invoiced Replacement Costs" means the Replacement Costs which
                  --------------------------
                 have been billed to Supplier or subtracted from payments to
                 Supplier in accordance with the provisions of Section 4.2 and
                 Section 7.4.

          1.2.36 "ISA" means the Mountain West Independent System Administrator,
                  ---
                 or the regional transmission organization authorized with the
                 responsibility for the scheduling and administration of Energy
                 and Ancillary Services over, through and within the
                 Transmission System in coordination with other interconnected
                 entities to provide transmission services.

          1.2.37 "ISA's OATT" means the ISA's then-effective Open Access
                  ----------
                 Transmission Tariff, as it may be amended, which has been
                 accepted for filing by the FERC.

          1.2.38 "Law" means any law, treaty, code, rule, regulation, order,
                  ---
                 determination, permit, certificate, authorization, or approval
                 of an arbitrator, court or other Governmental Authority which
                 is binding on a Party or any of its property.

          1.2.39 "Limit on Excused Energy" means the amount of energy that can
                  -----------------------
                 be excused under the provisions of Section 12.4 as shown on
                 Exhibit A.

          1.2.40 "Market Price of Energy" has the meaning set forth in Section
                  ----------------------
                 6.2.1.

          1.2.41 "Minimum Annual Energy Take" has the meaning set forth in
                  --------------------------
                 Section 4.1.2.

          1.2.42 "Minimum Hourly Energy Take" has the meaning set forth in
                  --------------------------
                 Section 4.1.3.

                                       6


          1.2.43 "Minimum Investment Grade Rating" of a Person means that such
                  -------------------------------
                 Person has a minimum credit rating on its senior unsecured debt
                 securities of at least two of the following ratings: (i) BBB as
                 determined by Standard & Poor's Corporation, (ii) Baa2 as
                 determined by Moody's Investors Service, Inc., or (iii) a
                 comparable rating by another nationally recognized rating
                 service reasonably acceptable to Buyer.

          1.2.44 "Minimum Tangible Net Worth" means the total book value of
                  --------------------------
                 shareholder's equity less the balance of goodwill, as reported
                 on the latest quarterly balance sheet prepared in accordance
                 with Generally Accepted Accounting Principles (GAAP).

          1.2.45 "Negotiated Service" has the meaning set forth in the wholesale
                  ------------------
                 generation tariff filed in FERC Docket No. ER00-2018.

          1.2.46 "NERC" means the North American Electric Reliability Council
                  ----
                 and any successor entity thereto.

          1.2.47 "Nonemergency Condition" shall mean the determination,
                  ----------------------
                 direction or order by the ISA, or Control Area Operator to
                 Supplier and/or Buyer to change the Supply Amount which is not
                 a result of or due to an Emergency Condition. A Nonemergency
                 Condition includes an insufficiency of Ancillary Services to
                 securely operate the Control Area.

          1.2.48 "Operating Representatives" means the persons designated by
                  -------------------------
                 each Party to transmit and receive routine operating and
                 emergency communications required under this Agreement.

          1.2.49 "Party" has the meaning set forth in the preamble of this
                  -----
                 Agreement.

          1.2.50 "Permitted Deratings" means those reductions to the Asset
                  -------------------
                 Bundle Capacity of which Supplier may notify Buyer from time to
                 time in an Availability Notice pursuant to Section 5.2.

          1.2.51 "Person" means any natural person, partnership, limited
                  ------
                 liability company, joint venture, corporation, trust,
                 unincorporated organization, or governmental entity or any
                 department or agency thereof.

          1.2.52 "Point of Delivery" means the point (s) which has (have) been
                  -----------------
                 specified as the Interconnection Point(s) in the
                 Interconnection Agreement between Buyer and Supplier, dated
                 October 25, 2000, as it may be amended from time to time, as
                 well as any alternative locations agreed upon pursuant to
                 Section 4.1.6.

          1.2.53 "Price Ceiling of Energy" means the ceiling price of Energy as
                  -----------------------
                 stated in Exhibit B.

                                       7


          1.2.54 "Price Floor of Energy" means the floor price of Energy as
                  ---------------------
                 stated in Exhibit B.

          1.2.55 "Provider of Last Resort (PLR)" has the meaning set forth in
                  -----------------------------
                 the Recitals.

          1.2.56 "PUCN" means the Public Utilities Commission of Nevada and any
                  ----
                 successor entity thereto.

          1.2.57 "Recourse Service" has the meaning set forth in the wholesale
                  ----------------
                 generation tariff filed in FERC Docket No. ER00-2018.

          1.2.58 "Replacement Costs" means with respect to a period of time, the
                  -----------------
                 difference between (a) the actual costs, including without
                 limitation related penalties and transmission costs, incurred
                 by Buyer to replace any shortfall between (1) the Supply Amount
                 and (2) the Delivered Amounts of Energy (or in the case of
                 Ancillary Services the Supplier's schedule of Ancillary
                 Services) during such period and (b) the payments the Supplier
                 would have been entitled to in respect of such shortfall in
                 delivery; provided that Replacement Costs shall also be subject
                 to the annual true-up mechanism set forth in Section 7.5.

          1.2.59 "Supply Amount" means, with respect to each Dispatch Hour, the
                  -------------
                 amount of Energy and Ancillary Services, not to exceed the
                 Asset Bundle Capacity for such Dispatch Hour, requested by
                 Buyer to be delivered by Supplier during any Dispatch Hour. The
                 Supply Amount for any Dispatch Hour shall be determined
                 pursuant to Section 5.1.

          1.2.60 "Total Amount of Energy Replaced" means the summation of
                  -------------------------------
                 Replacement Energy as shown on Exhibit E.

          1.2.61 "TPPA Amount" means the amount paid by Buyer to Supplier in
                  -----------
                 consideration of this Agreement as provided in Sections 3.1 and
                 4.2 of the Asset Sale Agreement.

          1.2.62 "Transitional Resource Requirement" or "TRR" means the Energy
                  ---------------------------------
                 and loss compensation necessary for Buyer to meet its
                 obligations as a Provider of Last Resort (PLR) for Nevada and
                 under those wholesale sales agreements existing at the
                 Effective Date.

          1.2.63 "Transmission System" means the facilities that are used to
                  -------------------
                 provide transmission service within Buyer's Control Area in
                 accordance with Buyer's OATT or the ISA's OATT.

          1.2.64 "WSCC" means the Western Systems Coordinating Council and any
                  ----
                 successor entity thereto.

                                       8


2.   TERM

     2.1  Term.
          ----

          2.1.1  Subject to the provisions of Section 2.1.2, unless
                 terminated earlier pursuant to the terms of this
                 Agreement, the term of this Agreement shall commence on
                 the Effective Date and continue until the earlier of the
                 effective date of an order by a Governmental Authority
                 terminating Buyer's PLR responsibility or at 11:59 p.m.
                 (Pacific Time) on December 31, 2002. Supplier shall
                 provide service under this Agreement commencing on the
                 first hour on the day after the Effective Date.

          2.1.2  Provided that this Agreement has not otherwise
                 terminated as a result of an order by a Governmental
                 Authority terminating Buyer's PLR responsibility, Buyer
                 in its sole discretion may provide written notification
                 to Supplier, at any point during October 2002, that it
                 is exercising its unilateral right to take service under
                 the terms and conditions of this Agreement for the
                 period from January 1, 2003 until 11:59 p.m. (Pacific
                 Time) February 28, 2003.

2.2  Termination.
     -----------

          2.2.1  Except pursuant to Sections 2.2.2 or 17.4, this Agreement may
                 not be terminated without the explicit prior written approval
                 of Buyer.

          2.2.2  If, prior to the Asset Sale Closing, the FERC or any other
                 Governmental Authority places conditions on or requires
                 revisions of this Agreement which have a material adverse
                 effect on Supplier or Buyer, the Parties agree to negotiate in
                 good faith those amendments to the Agreement reasonably
                 necessary to preserve the bargain between the Parties. If the
                 Parties fail to negotiate mutually acceptable amendments to
                 this Agreement within sixty (60) days of such action by the
                 FERC or other Governmental Authority, either Party may
                 terminate the Agreement after first notifying the other Party
                 in writing at least ten (10) Business Days prior to the
                 termination date; provided that neither Party may exercise a
                 right of termination pursuant to this Section 2.2.2 after the
                 Asset Sale Closing.

          2.2.3  This Agreement may be terminated with the mutual agreement of
                 the Parties.

          2.2.4  Any termination of this Agreement pursuant to this Section 2
                 shall not take effect until FERC either authorizes the
                 termination or accepts a written notice of termination.

                                       9


2.3  Effect of Termination.
     ---------------------

          2.3.1  Adjustment of TPPA Amount. If the Effective Date of this
                 -------------------------
                 Agreement is before June 1, 2001, the TPPA Amount shall be
                 adjusted to equal (1) the TPPA Amount multiplied by (2) 100%
                 plus the sum of the monthly adjustments from Exhibit J for each
                 month or portion thereof between the Effective Date and June 1,
                 2001. An example calculation is shown on Exhibit J.

                 If the Effective Date of this Agreement is after June 1, 2001,
                 the TPPA Amount shall be adjusted to equal (1) the TPPA Amount
                 multiplied by (2) 100% minus the sum of the monthly adjustments
                 from Exhibit J for each month or portion thereof between June
                 1, 2001 and the Effective Date. An example calculation is shown
                 on Exhibit J.

                 If this Agreement is terminated on or before December 31, 2002
                 (or March 1, 2003, if Buyer exercises its rights under Section
                 2.1.2 of this Agreement), Supplier shall pay to Buyer an
                 amount, in accordance with the provisions of Section 7, equal
                 to the TPPA Amount which existed before any adjustment in
                 accordance with the first or second paragraph of this Section
                 2.3.1, multiplied by the sum of: (x) the total monthly
                 adjustments for every month or portion thereof between the date
                 on which this Agreement is terminated and December 31, 2002;
                 and, (y) the total monthly adjustments for every month or
                 portion thereof between either (i) January 1, 2003 and March 1,
                 2003, or (ii) if this Agreement is terminated after January 1,
                 2003, the termination date of this Agreement and March 1, 2003.
                 An example calculation is shown on Exhibit J.

          2.3.2  Any default or termination of this Agreement shall not release
                 either Party from any applicable provisions of this Agreement
                 with respect to:

                 2.3.2.1 The payment of liquidated damages pursuant to Sections
                         4.2, 12, 17, 18, or 21.

                 2.3.2.2 Indemnity obligations contained in Section 10, to the
                         extent of the statute of limitations period applicable
                         to any third party claim.

                 2.3.2.3 Limitation of liability provisions contained in Section
                         11.

                 2.3.2.4 Payment of any unpaid amounts in respect of obligations
                         arising prior to or resulting from termination.

                 2.3.2.5 For a period of one (1) year after the termination
                         date, the right to raise a payment dispute and the
                         resolution thereof pursuant to Section 13.

                                       10


                 2.3.2.6 The resolution of any dispute submitted pursuant to
                         Section 13 prior to, or resulting from, termination.

3.   SECURITY

     3.1  Supplier Certification; Guarantee. As a condition of Buyer's execution
          ---------------------------------
          of, and continuing compliance with, this Agreement, Supplier shall at
          Supplier's option comply with the provisions of either Section 3.1.1
          or Section 3.1.2.

          3.1.1  Supplier Certification. Supplier shall (a) provide a
                 ----------------------
                 certificate from a duly authorized corporate officer of
                 Supplier certifying that, as of the Effective Date, Supplier
                 has a credit rating equal to or higher than the Minimum
                 Investment Grade Rating; or (b) post a letter of credit in a
                 form reasonably acceptable to Buyer in the amount of the Credit
                 Amount from a financial institution with each of: (i) a credit
                 rating of A2 or better from Moody's Investors Service, Inc.,
                 (ii) a credit rating of A or better from Standard & Poor's
                 Corporation, and (iii) a Minimum Tangible Net Worth ("MTNW") of
                 one (1) billion dollars.

          3.1.2  Guarantee. In the alternative to the provisions of Section
                 ---------
                 3.1.1, the Supplier may provide a corporate guarantee, in form
                 and substance as set forth in Exhibit H, made by an entity (the
                 "Guarantor") that:

                 3.1.2.1 has a credit rating equal to or higher than the Minimum
                         Investment Grade Rating, together with a certificate
                         from a duly authorized corporate officer of such
                         Guarantor certifying that, as of the Effective Date,
                         such Guarantor has a credit rating equal to or higher
                         than the Minimum Investment Grade Rating; or

                 3.1.2.2 has a MTNW of no less than one (1) billion dollars,
                         together with a certificate from a duly authorized
                         corporate officer of such Guarantor certifying that, as
                         of the Effective Date, such Guarantor has a MTNW of no
                         less than one (1) billion dollars; or

                 3.1.2.3 posts a letter of credit in a form reasonably
                         acceptable to Buyer in the amount of the Credit Amount
                         from a financial institution with each of: (i) a credit
                         rating of A2 or better from Moody's Investors Service,
                         Inc., (ii) a credit rating of A or better from Standard
                         & Poor's Corporation, and (iii) a Minimum Tangible Net
                         Worth ("MTNW") of one (1) billion dollars.

     3.2  Compliance.
          ----------

          3.2.1  Reporting. If at any time during the term of this Agreement,
                 ---------
                 Standard & Poor's Corporation, Moody's Investors Service, Inc.
                 or another nationally recognized firm downgrades the credit
                 rating of Supplier, the Guarantor, or the financial institution
                 that issued the letter of credit, as applicable, then Supplier
                 shall provide Buyer with written notice of

                                       11


                        such change of circumstance within two (2) Business Days
                        of any such change. In the event such a downgrade also
                        constitutes an Event of Default pursuant to Section 17,
                        the requirements of this Section 3.2.1 are in addition
                        to, and not in lieu of, the requirements of Section 17.

4.      SUPPLY SERVICE

        4.1     Obligations of the Parties.
                --------------------------

                4.1.1   Supply Amount. Supplier shall be required to provide the
                        -------------
                        Supply Amount in any Dispatch Hour. As provided in
                        Section 5.1, Buyer shall make reasonable efforts to
                        ensure that the Supply Amount is no greater than
                        necessary to satisfy Buyer's TRR.

                4.1.1.1 With the Buyer's prior consent, not to be unreasonably
                        withheld or delayed, Supplier shall be entitled to
                        generate or otherwise procure the Supply Amount from
                        sources other than the Asset Bundle.

                4.1.1.2 Supplier shall deliver the Supply Amount to Buyer during
                        the Dispatch Hour on a continuous basis at the Point(s)
                        of Delivery and shall schedule the Supply Amount in
                        accordance with the Buyer's OATT or the ISA's OATT, as
                        applicable.

                4.1.1.3 The Buyer at its sole discretion shall designate the
                        allocation of the Supply Amount between Energy and
                        Ancillary Services in accordance with the notification
                        provisions of Section 5.

                        4.1.1.3.1 The Parties recognize that operation of the
                                  Asset Bundle is subject to, and thus the
                                  Supply Amount at times may be limited by, the
                                  operational parameters of the Asset Bundle.
                                  The Parties further recognize that the
                                  consolidation of two or more generating units
                                  into an Asset Bundle precludes contractual
                                  provisions addressing such operational
                                  parameters in a matter normally applied to
                                  Energy purchases from specified generating
                                  units. Consequently, Supplier will have the
                                  right to raise concerns regarding the effect
                                  of such operational parameters upon Buyer's
                                  day-ahead requests, and Buyer will make good
                                  faith efforts to alleviate Supplier's
                                  concerns.

                        4.1.1.3.2 The Parties further recognize that the Asset
                                  Bundle also is subject to the contractual and
                                  operating constraints set forth in Exhibit M.


                                      12


        4.1.2   Minimum Annual Energy Take. The Buyer shall accept a minimum
                --------------------------
                annual energy take during each Contract Year. The Minimum Annual
                Energy Take shall be set forth on Exhibit A.

                4.1.2.1 Buyer's Obligation to Take. If Buyer is unwilling to
                        --------------------------
                        accept the Minimum Annual Energy Take for any Contract
                        Year, as may be adjusted pursuant to Section 4.1.2.2,
                        the difference (in MWh) between the Supply Amount of
                        Energy (including consideration for Energy that would
                        have been taken but was unavailable due to Permitted
                        Deratings or Force Majeure, as well as the Total Amount
                        of Energy Replaced) and the Minimum Annual Energy Take
                        shall be billed at the Price Ceiling of Energy less the
                        Price Floor of Energy. An example of the monthly
                        determination of the amount of Energy to be credited
                        against the Minimum Annual Energy Take is shown on
                        Exhibit L.

                4.1.2.2 Adjustments to Minimum Annual Energy Take. Buyer shall
                        -----------------------------------------
                        have the right to reduce the Minimum Annual Energy Take
                        if the number of customers taking electric service from
                        Buyer falls below the number of customers on December
                        31, 2000. Adjustments will be applicable, on a pro rata
                        basis, on the first (1st) day of the month immediately
                        following Supplier's receipt of Buyer's notice of
                        adjustment. Buyer shall provide supporting data in
                        reasonable detail to support its calculations. An
                        example of the calculation of a revised Minimum Annual
                        Energy Take is shown on Exhibit K.

        4.1.3   Minimum Hourly Energy Take. The Buyer shall accept a Minimum
                --------------------------
                Hourly Energy Take for any Dispatch Hour if the Supply Amount,
                or a portion thereof, is provided to Buyer from the Asset
                Bundle. The Minimum Hourly Energy Take is stated in Exhibit A.

                4.1.3.1 Buyer's Obligation to Take. If Buyer is unwilling to
                        --------------------------
                        accept the Minimum Hourly Energy Take, the difference
                        (in Mwh) between the Supply Amount of Energy (including
                        consideration for Energy that would have been taken but
                        was unavailable due to Permitted Deratings or Force
                        Majeure, as well as the Total Amount of Energy Replaced)
                        and Minimum Hourly Energy Take shall be billed at the
                        Price Ceiling of Energy less the Price Floor of Energy.

        4.1.4   Supplier Rights to Output. Supplier may sell to others any
                -------------------------
                portion of the Asset Bundle Capacity in excess of the Supply
                Amount.


                                      13


        4.1.5   Point(s) of Delivery. Supplier shall deliver, and Buyer shall
                --------------------
                take delivery of, the Supply Amount of Energy at the Point(s) of
                Delivery. Subject to Section 4.1.6.2, Supplier shall be
                responsible for all costs associated with delivery of the Supply
                Amount of Energy to the Point(s) of Delivery.

        4.1.6   Alternative Points of Delivery. For any Dispatch Hour, either
                ------------------------------
                Party may designate one or more alternative Points of Delivery,
                subject to the other Party's prior approval and consistent with
                Buyer's OATT or the ISA's OATT, as applicable, such approval not
                to be unreasonably withheld or delayed.

                4.1.6.1 If Supplier has designated an alternative Point of
                        Delivery, Supplier shall be responsible for all costs of
                        delivery to such alternative Point of Delivery.


                4.1.6.2 If Buyer has designated an alternative Point of
                        Delivery, Buyer shall be responsible for all costs of
                        delivery to such alternative Point of Delivery.

        4.1.7   Fuel. Buyer shall have no responsibility for any fuel
                ----
                procurement or fuel transportation costs or activities
                associated with the Asset Bundle during the term of this
                Agreement.

        4.1.8   Resale. Except as provided in the next sentence, the Supply
                ------
                Amount may be resold by Buyer only as necessary to satisfy
                Buyer's TRR. If, after submitting the day-ahead request of the
                Supply Amount pursuant to Section 5.1, the Buyer determines that
                the scheduled Supply Amount, together with purchases scheduled
                on a day-ahead basis under Buyer's other Transitional Power
                Purchase Agreements, exceeds Buyer's most current projected TRR,
                then the Buyer also shall resell at wholesale that amount of
                Energy in excess of Buyer's actual TRR as necessary to balance
                its load and resources.

        4.1.9   Right to Review. Buyer and Supplier each shall have the right to
                ---------------
                review during normal business hours the relevant books and
                records of the other Party to confirm the accuracy of such as it
                pertains to transactions under this Agreement. The review shall
                be consistent with standard business practices and shall follow
                reasonable notice to the other Party. Reasonable notice for a
                review of the previous month's records shall be at least a
                twenty-four (24) hour period from a Business Day to a subsequent
                Business Day. If a review is requested of other than the
                previous month's records, then notice of that request shall be
                provided with a minimum of seven (7) calendar days written
                notice by the requesting Party. The notice shall specify the
                period to be covered by the review. The Party providing records
                can make reasonable requests that the receiving Party keep the
                records confidential, and the


                                      14


                receiving Party shall take reasonable steps to accommodate such
                requests.

        4.2     Liquidated Damages.
                ------------------

                4.2.1   If the Delivered Amount of Energy is less than the
                        Supply Amount of Energy in any Dispatch Hour during a
                        month, and Replacement Costs computed in respect of such
                        month are greater than zero, then Supplier shall
                        reimburse Buyer for such Replacement Costs. If
                        Supplier's schedule of Ancillary Services is less than
                        the Supply Amount of Ancillary Services in any Dispatch
                        Hour during a month, Supplier shall reimburse Buyer for
                        such Replacement Costs for the difference between
                        Supplier's schedule and the Supply Amount of Ancillary
                        Services. An example of the methodology used to
                        calculate Replacement Costs is provided in Exhibit D.

                4.2.2   Supplier also shall be responsible for any costs
                        incurred by Buyer associated with a violation of
                        reliability criteria (including but not limited to
                        imbalance costs or penalties) due to a deviation between
                        the Supply Amount and Delivered Amount.

                4.2.3   The Parties recognize and agree that the payment of such
                        amounts by Supplier pursuant to this Section 4.2 is an
                        appropriate remedy in the event of such a failure and
                        that any such payment does not constitute a forfeiture
                        or penalty of any kind, but rather constitutes actual
                        costs to Buyer under the terms of this Agreement.

        4.3     Supplier Operating Representative. Supplier shall provide and
                ---------------------------------
                maintain a twenty-four (24) hour seven (7) day per week
                communication link with Buyer's control center and with Buyer's
                schedulers. Supplier's Operating Representatives shall be
                available to address and make decisions on all operational
                matters under this Agreement on a twenty-four (24) hour seven
                (7) day per week basis.


5.      NOTIFICATION

        5.1     Scheduling Notification. Buyer shall provide Supplier with a
                -----------------------
                day-ahead request of the Supply Amount one (1) hour prior to
                when day-ahead bids are due to the CALPX. Buyer shall make
                reasonable efforts to ensure that the day-ahead request of the
                Supply Amount is no greater than that amount then projected to
                be necessary to satisfy Buyer's TRR. In addition, for each
                day-ahead request, the change in the Supply Amount from one (1)
                hour to the next hour shall be no greater than the ramping
                capability of the units within the Asset Bundle as shown in
                Exhibit A.


                                      15


        5.2     Availability Notification.
                -------------------------

                5.2.1   No later than 5:00 a.m. (Pacific Time) of each day,
                        Supplier shall deliver to Buyer an Availability Notice
                        in the form set forth in Exhibit G.

                5.2.2   Availability Notices shall provide, for the ninety-six
                        (96) hour period starting at 6:00 a.m. (Pacific Time)
                        that day, Supplier's hourly projection of the
                        unavailability or derating ("Derating") of the Asset
                        Bundle compared to the Asset Bundle Capacity figures
                        stated for each unit in Exhibit A. Each Availability
                        Notice also shall contain, as applicable:

                        (a) the units which are subject to a Derating;
                        (b) the magnitude of the Derating;
                        (c) the hours during which the Derating is expected to
                            apply;
                        (d) the cause of the Derating;
                        (e) the extent, if any, to which the Derating is
                            attributable to a Permitted Derating; and
                        (f) the projected Asset Bundle Capacity for each unit
                            during the period covered by the Availability
                            Notice, pursuant to Section 5.2.4 below.

                5.2.3   If and to the extent a Derating is the result of one or
                        more of the following causes, it shall be a Permitted
                        Derating:

                        (a) approved planned outages pursuant to Section 21;
                        (b) response to an Emergency Condition as described in
                            Section 20; or
                        (c) subject to the limitations expressed in Section
                            12.5, a Force Majeure event.

                5.2.4   In respect of any Dispatch Hour, the Asset Bundle
                        Capacity of each unit shall be the Asset Bundle Capacity
                        figure stated in Exhibit A minus any Permitted Derating
                        applicable during such hour.

                5.2.5   Neither the Asset Bundle Capacity nor the Supply Amount
                        shall be reduced by Deratings which are not Permitted
                        Deratings. Supplier shall be responsible for all
                        Replacement Costs, pursuant to Section 4.2.1, caused by
                        Deratings that are not Permitted Deratings.

6.      PRICING OF ENERGY AND ANCILLARY SERVICES

        6.1     Overview. The price of Energy paid by Buyer to Supplier shall be
                --------
                based upon a designated hourly market price, subject to monthly
                floor, monthly ceiling, and annual true-up provisions. The Price
                Floor of Energy will ensure that Supplier will receive an
                average price for Energy for each month which is not less than
                the price stated in Exhibit B. The Price Ceiling of Energy
                provision provides that the average price of Energy paid to
                Supplier each month and for each year shall not


                                      16


                exceed the price stated in Exhibit B.

        6.2     Price of Energy.
                ---------------

                6.2.1   Market Price of Energy. In respect of any Dispatch Hour,
                        ----------------------
                        the designated Market Price of Energy shall be the North
                        of Path 15 ("NP 15") hourly market-clearing price in the
                        day-ahead market from the CALPX as published at the
                        following Web Site (or its successor web site)
                        http://www.calpx.com/prices/index_prices_dayahead_
                        ---------------------------------------------------
                        trading.html. Should this hourly market in the day-ahead
                        ------------
                        market not exist for the entire term, the Parties shall
                        agree upon a similar market price index.

                6.2.2   Price Floor of Energy. The Price Floor of Energy is
                        ---------------------
                        stated in Exhibit B and shall not change during the term
                        of this Agreement.

                6.2.3   Price Ceiling of Energy. The Price Ceiling of Energy is
                        -----------------------
                        stated in Exhibit B and shall not change during the term
                        of this Agreement.

        6.3     Pricing of Ancillary Services. The price of the capacity
                -----------------------------
                component of Ancillary Services is stated in Exhibit B. The
                price of Ancillary Services shall not change during the term of
                the Agreement. Supplier shall make available to Buyer and Buyer
                shall offer to pass through the Energy portion of Ancillary
                Services with respect to the Supply Amount to the ISA, or
                Control Area Operator, at the Price Ceiling of Energy (plus
                expected direct transaction costs). The net proceeds shall be
                credited to the Supplier pursuant to Section 7.

        6.4     Price Revisions. The Parties waive any and all rights to seek to
                ---------------
                revise the provisions of this Agreement, including the prices
                stated, pursuant to Sections 205 and/or 206 of the Federal Power
                Act.

        6.5     Recourse Service. Buyer agrees not to purchase Recourse Service
                ----------------
                during the term of the Agreement. However, Buyer is permitted to
                purchase Negotiated Service during the term of the Agreement.

7.      INVOICING AND PAYMENTS

        7.1     Invoicing and Payment. On or before the tenth (10th) day of each
                ---------------------
                month, Supplier shall send to Buyer an invoice setting forth the
                Supply Amount, Delivered Amount, the Market Price of Energy
                pursuant to Section 6.2.1 for each Dispatch Hour in the previous
                month, any amount due in accordance with Section 7.13 and the
                total due from Buyer. The invoice shall be calculated based upon
                data available to Supplier and shall be in accordance with this
                Section 7 and Exhibit C. Buyer shall promptly notify Supplier if
                Buyer in good faith disputes any portion of the invoice, stating
                in reasonable detail the reason for the dispute.

        7.2     Monthly Invoice Calculation. On each monthly invoice, Supplier
                ---------------------------
                shall calculate the following amounts:


                                      17


                7.2.1   The Delivered Amount in respect of each Dispatch Hour
                        multiplied by the corresponding Market Price of Energy
                        pursuant to Section 6.2.1, summed over the billing
                        period;

                7.2.2   Sum of the Delivered Amounts in respect of all Dispatch
                        Hours of the billing period multiplied by the Price
                        Ceiling of Energy;

                7.2.3   Sum of the Delivered Amounts in respect of all Dispatch
                        Hours of the billing period multiplied by the Price
                        Floor of Energy;

                7.2.4   For each Dispatch Hour of the billing period, the
                        shortfall, if any, between the Supply Amount and the
                        Delivered Amount (and in the case of Ancillary Services
                        the shortfall between the Supply Amount of Ancillary
                        Services and Supplier's schedule of Ancillary Services);

                7.2.5   The Supply Amount of Ancillary Services for each
                        dispatch hour multiplied by the price of Ancillary
                        Services as stated in Exhibit B; and

                7.2.6   The Delivered Amount of Energy related to Ancillary
                        Services for each dispatch hour multiplied by the Price
                        Ceiling of Energy as stated in Exhibit B.

                7.2.7   If applicable, any amount to be calculated in accordance
                        with Section 7.13.

        7.3     Supplier's Invoice. Supplier will invoice the lesser of the
                ------------------
                amounts calculated in Sections 7.2.1 and 7.2.2, provided that if
                the amount calculated in Section 7.2.1 is less than the amount
                calculated in Section 7.2.3, Supplier shall invoice Buyer the
                amount calculated in Section 7.2.3. Supplier shall also include
                in its invoice the amounts calculated in Sections 7.2.5, 7.2.6
                and 7.2.7. If the Delivered Amount exceeds the Supply Amount,
                Buyer shall not be obligated to pay for the excess amount. Buyer
                shall pay Supplier for the amounts invoiced pursuant to Section
                7.2.6 upon Buyer's receipt of payment from ISA or Control Area
                Operator. Examples of this monthly invoice calculation (and
                annual true-up process) are contained in Exhibit C.

        7.4     Buyer's Invoice. In the event any shortfall occurs pursuant to
                ---------------
                Section 7.2.4 or payment is due to Buyer pursuant to Section
                7.13, Buyer shall within ten (10) Business Days of receipt of
                Supplier's invoice deliver to Supplier a Buyer's invoice
                detailing any Replacement Costs or other payment due. Buyer
                shall provide supporting data in reasonable detail to support
                its calculations of Replacement Costs. Supplier shall promptly
                notify Buyer if Supplier in good faith disputes any portion of
                the invoice, stating in reasonable detail the reason for the
                dispute. If the Buyer's invoice results in an amount due from
                Supplier to Buyer, Buyer may offset such amount from its payment
                of Supplier's corresponding invoice.


                                      18


                Buyer shall have the right to adjust the invoices issued in
                accordance with this Section 7.4 if Buyer incurs Replacement
                Costs that were not known when earlier invoices were issued.
                Adjusted invoices shall be issued within thirty (30) days of the
                date on which the additional Replacement Costs become known.
                Buyer shall provide supporting data in reasonable detail to
                support its calculations of Replacement Costs. Supplier shall
                promptly notify Buyer if Supplier in good faith disputes any
                portion of the invoice, stating in reasonable detail the reason
                for the dispute. If the Buyer's adjusted invoice results in an
                amount due from Supplier to Buyer, Buyer may offset such amount
                from its payment of Supplier's corresponding invoice.

        7.5     Annual True-Up Mechanism for Energy.
                -----------------------------------

                7.5.1   The annual true-up mechanism will provide adjustments
                        among the Parties with respect to each Contract Year in
                        the following scenarios:

                        (a)     If (i) the Price Ceiling of Energy multiplied by
                                the hourly Delivered Amount of Energy summed
                                over the Contract Year is less than or equal to
                                (ii) the Market Price of Energy for each hour
                                pursuant to Section 6.2.1 multiplied by the
                                Delivered Amount of Energy for each hour during
                                the Contract Year, Supplier shall subtract (x)
                                the amount invoiced by Supplier for Energy
                                pursuant to Section 7.3 summed of over the
                                Contract Year from (y) the Price Ceiling of
                                Energy multiplied by the hourly Delivered Amount
                                of Energy summed over the Contract Year. If the
                                difference calculated in accordance with the
                                preceding sentence is greater than or equal to
                                zero, Buyer shall pay the difference to
                                Supplier. If the difference is less than zero,
                                Supplier shall refund the difference to Buyer.

                        (b)     If (i) the Price Ceiling of Energy multiplied by
                                the hourly Delivered Amount of Energy summed
                                over the Contract Year is greater than or equal
                                to (ii) the Market Price of Energy for each hour
                                pursuant to Section 6.2.1 multiplied by the
                                Delivered Amount of Energy for each hour during
                                the Contract Year, Supplier shall subtract (x)
                                the amount invoiced by Supplier for Energy
                                pursuant to Section 7.3 summed of over the
                                Contract Year from (y) the Market Price of
                                Energy multiplied by the hourly Delivered Amount
                                of Energy summed over the Contract Year. If the
                                difference calculated in accordance with the
                                preceding sentence is greater than or equal to
                                zero, Buyer shall pay the difference to
                                Supplier. If the difference is less than zero,
                                Supplier shall refund the difference to Buyer.

                        (c)     If Buyer incurred Replacement Costs for energy
                                during the Contract Year, Supplier shall
                                multiply the Total Amount of Energy Replaced
                                during the Contract Year by the Average Cost of
                                Delivered Energy after true-up as determined in
                                accordance with


                                      19


                                Section 7.5.1 (a) or 7.5.1 (b). If the amount so
                                obtained is greater than the sum of the monthly
                                Gross Replacement Costs of Energy from Buyer's
                                Invoices for the Contract Year, the Adjusted
                                Replacement Cost of Energy for the Contract Year
                                shall be zero. If the amount so obtained is less
                                than the sum of the monthly Gross Replacement
                                Costs of Energy from Buyer's Invoices for the
                                Contract Year, the Adjusted Replacement Cost of
                                Energy for the Contract Year shall be the sum of
                                the monthly Gross Replacement Costs of Energy
                                less the amount obtained in accordance with the
                                first sentence of this Section 7.5.1(c).

                                If the Adjusted Replacement Cost of Energy is
                                greater than the sum of the monthly Invoiced
                                Replacement Costs of Energy from Buyer's
                                Invoices for the Contract Year, Supplier shall
                                pay the difference to Buyer. If the sum of the
                                monthly Invoiced Replacement costs of Energy is
                                greater than the Adjusted Replacement Cost of
                                Energy, Buyer shall pay the difference to
                                Seller.

                7.5.2   True-up adjustments will be calculated by Supplier
                        within twenty (20) days after each Contract Year.
                        Examples of the true-up calculations and invoice form
                        are set forth in Exhibit E. Interest shall be calculated
                        pursuant to 18 CFR Section 35.19a and shall be included
                        in the true-up invoice. Invoices for true-up adjustments
                        shall be submitted by Supplier within thirty (30) days
                        after the end of the Contract Year. Payments for such
                        invoices shall be due from Buyer thirty (30) days from
                        receipt of the true-up invoice.

        7.6     Invoice Disagreements. Should there be a good faith dispute over
                ---------------------
                any invoice, the Parties shall promptly seek resolution pursuant
                to Section 13. Pending resolution of the invoice dispute,
                payment shall be made or offsets or credits taken, as
                applicable, based upon the undisputed portion of the invoice.

        7.7     Adjustments. Upon resolution of the dispute, the prevailing
                -----------
                Party shall be entitled to receive the disputed amount, as
                finally determined to be payable along with interest (calculated
                pursuant to 18 C.F.R. (s) 35.19a through the date of payment. No
                invoice (or payment covered thereby) shall be subject to
                adjustment unless notice or request for adjustment is given
                within one (1) year of the date payment thereunder was due.

        7.8     Method of Payment. Subject to Sections 7.3, 7.6 and 7.7, Buyer
                -----------------
                shall remit all amounts due by wire or electronic fund transfer,
                pursuant to Supplier's invoice instructions, no later than
                thirty (30) days after receipt of the invoice.

        7.9     Overdue Payments. Overdue payments shall bear interest from and
                ----------------
                including, the due date to the date of payment on the unpaid
                portion calculated pursuant to 18 C.F.R.(s)35.19a.

        7.10    Buyer Right to Offset. Buyer shall have the right to offset any
                ---------------------
                amounts Supplier


                                      20


                owes to Buyer, including Replacement Costs (except for such
                amounts disputed in good faith by Supplier), against the amounts
                owed by Buyer to Supplier.

        7.11    Taxes. Each Party shall pay ad valorem and other taxes
                -----
                attributed to its facilities and services provided. Supplier
                shall not include any taxes of any kind in its invoices to
                Buyer. The prices of Energy and Ancillary Services shall not
                change during the term of this Agreement as a result of any
                changes in local, state or federal taxes, fees or levies.

        7.12    Late Invoices. If either Party submits an invoice outside of the
                -------------
                time deadlines set forth herein, that Party shall not forfeit
                its rights to collect the amounts due thereunder, provided that
                such invoice is no more than six (6) months late, and provided
                that changes to invoices remain subject to the deadline in
                Section 7.7.

        7.13    Early Termination. Notwithstanding any other provision herein,
                -----------------
                in the event that this Agreement is terminated before December
                31, 2002 (or March 1, 2003 if Buyer exercises its rights under
                Section 2.1.2), and as a result of such termination Buyer is
                entitled to a payment in accordance with Section 2.3.1, Supplier
                shall include an amount calculated in accordance with Section
                2.3.1 and Exhibit J, to be paid by Supplier to Buyer in the next
                monthly invoice submitted to Buyer following such termination.

8.      REGULATORY APPROVALS

        8.1     This Agreement will be filed with the FERC and any other
                appropriate regulatory agencies by the appropriate Party as may
                be required.

9.      COMPLIANCE

        9.1     Each Party shall comply with all relevant Laws and shall, at its
                sole expense, maintain in full force and effect all relevant
                permits, authorizations, licenses, and other authorizations
                material to the maintenance of facilities and the performance of
                obligations under this Agreement.

        9.2     Each Party and its representatives shall comply with all
                relevant requirements of any authorized Control Area Operator,
                ISA, and/or EDU to ensure the safety of its employees and the
                public, and to ensure electric system reliability and integrity,
                material to the performance of this Agreement.

        9.3     Buyer and Supplier shall perform or cause to be performed, their
                obligations under this Agreement in all material respects in
                accordance with Good Utility Practices.



                                      21


10.     INDEMNIFICATION

        10.1    To the fullest extent permitted by law, a Party to this
                Agreement ("the Indemnifying Party") shall indemnify, defend and
                hold harmless the other Party, its parent, affiliates, and
                successors and agents (each an "Indemnified Party") from and
                against any and all claims, demands, suits, obligations,
                payments, liabilities, costs, judgments, damages, losses or
                expenses asserted by third parties against an Indemnified Party
                and arising out of, relating to, or resulting from the
                Indemnifying Party's breach of, or the negligent performance of
                its obligations under this Agreement.

                10.1.1  Such indemnity shall also extend to actual courts costs,
                        attorneys' fees, expenses and other liabilities incurred
                        in the defense of any claim, action or proceeding,
                        including negotiation, settlement, defense and appeals,
                        to which this indemnification obligation applies. In
                        furtherance of the foregoing indemnification and not by
                        way of limitation thereof, the Indemnifying Party hereby
                        waives any defense it otherwise might have against the
                        Indemnified Party under applicable workers' compensation
                        laws.

                10.1.2  In claims against any Indemnified Party by an agent of
                        the Indemnifying Party, or anyone directly or indirectly
                        employed by them or anyone for whose acts they may be
                        liable, the indemnification obligation under this
                        Section 10 shall not be limited by a limitation on
                        amount or type of damages, compensation or benefits
                        payable by or for the Indemnifying Party or a
                        subcontractor under workers' or workmen's compensation
                        acts, disability benefit acts or other employee benefit
                        acts.

                10.1.3  Such indemnity shall also extend to all costs and
                        expenses incurred by the Indemnified Party in any action
                        or proceeding to enforce the provisions of this
                        Agreement, but only if and to the extent the Indemnified
                        Party prevails in such action or proceeding.


        10.2    No Negation of Existing Indemnities; Survival. Each Party's
                ---------------------------------------------
                indemnity obligations hereunder shall not be construed to
                negate, abridge or reduce other rights or obligations or
                indemnity which would otherwise exist at law or equity. The
                obligations contained herein shall survive any termination,
                cancellation, or suspension of this Agreement to the extent that
                any third party claim is commenced during the applicable statute
                of limitations period.

        10.3    Indemnification Procedures.
                --------------------------

                10.3.1  Any Party seeking indemnification under this Agreement
                        shall give the other Party notice of such claim promptly
                        but in any event on or before thirty (30) days after the
                        Party's actual knowledge of such claim or action. Such
                        notice shall describe the claim in reasonable detail,
                        and

                                      22


                        shall indicate the amount (estimated if necessary) of
                        the claim that has been, or may be sustained by, said
                        Party. To the extent that the other Party will have been
                        actually and materially prejudiced as a result of the
                        failure to provide such notice, such notice will be a
                        condition precedent to any liability of the other Party
                        under the provisions for indemnification contained in
                        this Agreement.

                10.3.2  In any action or proceeding brought against an
                        Indemnified Party by reason of any claim indemnifiable
                        hereunder, the Indemnifying Party may, at its sole
                        option, elect to assume the defense at the Indemnifying
                        Party's expense, and shall have the right to control the
                        defense thereof and to determine the settlement or
                        compromise of any such action or proceeding.
                        Notwithstanding the foregoing, an Indemnified Party
                        shall in all cases be entitled to control its defense in
                        any action if it:

                        (i)     may result in injunctions or other equitable
                                remedies in respect of the Indemnified Party
                                which would affect its business or operations in
                                any materially adverse manner;

                        (ii)    may result in material liabilities which may not
                                be fully indemnified hereunder; or

                        (iii)   may have a significant adverse impact on the
                                business or the financial condition of the
                                Indemnified Party (including a material adverse
                                effect on the tax liabilities, earnings or
                                ongoing business relationships of the
                                Indemnified Party) even if the Indemnifying
                                Party pays all indemnification amounts in full.

                10.3.3  Subject to Section 10.3.2, neither Party may settle or
                        compromise any claim for which indemnification is sought
                        under this Agreement without the prior consent of the
                        other Party; provided, however, said consent shall not
                        be unreasonably withheld or delayed.

11.     LIMITATION OF LIABILITY

        11.1    Responsibility for Damages: Except as otherwise provided herein
                --------------------------
                or to the extent of the other Party's negligence or willful
                misconduct, each Party shall be responsible for all physical
                damage to or destruction of the property, equipment and/or
                facilities owned by it and its affiliates and any physical
                injury or death to natural Persons resulting therefrom,
                regardless of who brings the claim and regardless of who caused
                the damage, and shall not seek recovery or reimbursement from
                the other Party for such damage; provided, that in any such case
                the Parties will exercise Due Diligence to remove the cause of
                any disability at the earliest practicable time.


                                      23


        11.2    No Consequential Damages: To the fullest extent permitted by law
                ------------------------
                and notwithstanding other provisions of this Agreement, in no
                event shall a Party, or any of its Agents, be liable to the
                other Party, whether in contract, warranty, tort, negligence,
                strict liability, or otherwise, for special, indirect,
                incidental, multiple, consequential (including but not limited
                to lost profits or revenues and lost business opportunities), or
                punitive damages related to or resulting from performance or
                nonperformance of this Agreement or any activity associated with
                or arising out of this Agreement. For purposes of clarification,
                Replacement Costs shall not be considered consequential or
                incidental damages under this Section 11.2. In addition, this
                limitation on liability shall not apply with respect to claims
                pursuant to Section 10 hereof.

        11.3    Survival: The provisions of this Section 11 shall survive any
                --------
                termination, cancellation, or suspension of this Agreement.

12.     FORCE MAJEURE

        12.1    An event of "Force Majeure" shall be defined as any interruption
                or failure of service or deficiency in the quality or quantity
                of service or any other failure by a Party to perform any of its
                obligations hereunder to the extent such failure occurs without
                fault or negligence on the part of that Party and is caused by
                factors beyond that Party's reasonable control, which by the
                exercise of reasonable diligence that Party is unable to
                prevent, avoid, mitigate or overcome, including:

                (i)     acts of God or the public enemy, such as storms, flood,
                        lightning, and earthquakes,

                (ii)    failure, threat of failure, or unscheduled withdrawal of
                        facilities from operation for maintenance or repair, and
                        including unscheduled transmission and distribution
                        outages,

                (iii)   sabotage of facilities and equipment,

                (iv)    civil disturbance,

                (v)     strike or labor dispute,

                (vi)    action or inaction of a court or public authority, or

                (vii)   any other cause of similar nature beyond the reasonable
                        control of that Party.

        12.2    Economic hardship of either Party shall not constitute Force
                Majeure under this Agreement. Notwithstanding this, if Buyer
                suffers an event of Force Majeure it shall be relieved of its
                obligation to take delivery of, or otherwise pay for, Energy and
                Ancillary Services under this Agreement for the duration of the
                event of Force Majeure; provided, however, that Buyer shall not
                be relieved of its obligation to pay for any Energy or Ancillary
                Services provided by Supplier under

                                      24


                this Agreement prior to the event of Force Majeure. In addition,
                if Buyer is unable to have Energy and Ancillary Services
                delivered from the Point(s) of Delivery to its service territory
                due to an outage on the Transmission System, that shall be
                considered a Force Majeure event and shall relieve Buyer of
                performance for the extent of the event.


        12.3    In the event of a Force Majeure, neither Party shall be
                considered in default under this Agreement or responsible to the
                other Party in tort, strict liability, contract or other legal
                theory for damages of any description, and affected performance
                obligations shall be extended by a period equal to the term of
                the resultant delay, but in no event shall exceed the term of
                the Agreement, provided that the Party relying on a claim of
                Force Majeure:

                (i)     provides prompt written notice of such Force Majeure
                        event to the other Party, giving an estimate of its
                        expected duration and the probable impact on the
                        performance of its obligations hereunder;

                (ii)    exercises all reasonable efforts to continue to perform
                        its obligations under this Agreement;

                (iii)   expeditiously takes action to correct or cure the event
                        or condition excusing performance so that the suspension
                        of performance is no greater in scope and no longer in
                        duration than is dictated by the problem; provided,
                        however, that settlement of strikes or other labor
                        disputes will be completely within the sole discretion
                        of the Party affected by such strike or labor dispute;

                (iv)    exercises all reasonable efforts to mitigate or limit
                        damages to the other Party; and

                (v)     provides prompt notice to the other Party of the
                        cessation of the event or condition giving rise to its
                        excuse from performance.

        12.4    Notwithstanding the above provisions, a Force Majeure event
                shall excuse Supplier from its obligation to deliver the Supply
                Amount pursuant to Section 4 of this Agreement only for the
                first twenty-four (24) hours of the Force Majeure event,
                provided that the total amount of energy excused in accordance
                with this Section 12.4 during any Contract Year shall not exceed
                the Limit on Excused Energy set forth in Exhibit A. After such
                twenty-four (24) hour period, Supplier must either deliver the
                Supply Amount at the Point(s) of Delivery or pay liquidated
                damages pursuant to Section 4.2 of this Agreement.

        12.5    If Supplier has notified Buyer of an event of Force Majeure, and
                if Supplier so requests, Buyer will attempt to replace the
                Supply Amount that is not excused in accordance with Section
                12.4 with Energy or Ancillary Services from another Asset
                Bundle. However, Buyer's inability to acquire such replacement
                Energy or Ancillary Services shall not excuse Supplier from
                Supplier's obligation to deliver

                                      25


                the Supply Amount not otherwise excused in accordance with
                Section 12.4

13.     DISPUTES

        13.1    Any action, claim or dispute which either Party may have against
                the other arising out of or relating to this Agreement or the
                transactions contemplated hereunder, or the breach, termination
                or validity thereof (any such claim or dispute, a "Dispute")
                shall be submitted in writing to the other Party. The written
                submission of any Dispute shall include a concise statement of
                the question or issue in dispute together with a statement
                listing the relevant facts and documentation that support the
                claim.

        13.2    The Parties agree to cooperate in good faith to expedite the
                resolution of any Dispute. Pending resolution of a Dispute, the
                Parties shall proceed diligently with the performance of their
                obligations under this Agreement.

        13.3    The Parties shall first attempt in good faith to resolve any
                Dispute through informal negotiations by the Contract
                Representatives. In the event that the Contract Representatives
                are unable to satisfactorily resolve the Dispute within thirty
                (30) days from the receipt of notice of the Dispute, either
                Party may by written notice to the other Party refer the Dispute
                to its respective senior management for resolution as promptly
                as practicable. If the Parties' senior management are unable to
                resolve the Dispute within forty-five (45) days from the date of
                such referral, thereafter the Parties may agree in writing to
                extend the time period of such senior management negotiations.
                In the event the Parties' senior management do not resolve the
                dispute within the prescribed or extended time period, either
                Party may initiate arbitration through the serving and filing of
                a demand for arbitration and the Parties expressly agree that
                arbitration in accordance with this Section 13 shall be the
                exclusive means to further resolve any Dispute and hereby
                irrevocably waive their right to a jury trial with respect to
                any Dispute, provided that at any time:

                13.3.1  A request made by a Party for provisional remedies
                        requesting preservation of the Parties' respective
                        rights and obligations under the Agreement may be
                        resolved by a court of law located in the County of the
                        principal place of business of Buyer.

                13.3.2  Nothing in this Agreement shall preclude, or be
                        construed to preclude, any Party from filing a petition
                        or complaint with the FERC or PUCN with respect to any
                        arbitrable Dispute over which said agency has
                        jurisdiction. In such case, the other Party may request
                        the FERC or PUCN, as applicable, to reject or to waive
                        jurisdiction. If jurisdiction is rejected or waived with
                        respect to all or a portion of the Dispute, the portion
                        of the Dispute not so accepted by the FERC or PUCN, as
                        applicable, shall be resolved through arbitration in
                        accordance with this Agreement. To the extent that the
                        FERC or PUCN, as applicable, asserts or accepts
                        jurisdiction over the Dispute, the decision, finding of
                        fact or order of FERC shall be final and binding,
                        subject to judicial

                                      26


                        review under the Federal Power Act or Nevada Revised
                        Statutes and subject to the provisions of Section 2.2.2.
                        Any arbitration proceedings that may have commenced with
                        respect to the Dispute prior to the assertion or
                        acceptance of jurisdiction by the FERC or PUCN, as
                        applicable, shall be terminated to the extent the FERC
                        or PUCN accepts or asserts jurisdiction over such
                        Dispute.

        13.4    Unless otherwise agreed by the Parties, any arbitration
                initiated under this Agreement shall be conducted in accordance
                with the following:

                13.4.1  Arbitrations shall be held within the County of the
                        principal place of business of Buyer.

                13.4.2  Except as otherwise modified herein, the arbitration
                        shall be conducted in accordance with the "Commercial
                        Arbitration Rules" of the American Arbitration
                        Association ("AAA") then in effect.

                13.4.3  Arbitration shall be conducted by one neutral arbitrator
                        who shall be selected pursuant to the AAA rules and the
                        following:

                        13.4.3.1 The Parties agree that the list of potential
                                 arbitrators provided by the AAA shall, if
                                 available, contain twenty (20) candidates, and
                                 at least fifty percent (50%) of the candidates
                                 shall be members of the AAA National Energy
                                 Panel.

                        13.4.3.2 The Parties also agree that each shall be
                                 allowed to strike the names of five candidates
                                 before ranking the remaining candidates and
                                 returning the list to the AAA in accordance
                                 with the Commercial Arbitration Rules. If the
                                 Parties are unable to agree on an arbitrator,
                                 such arbitrator shall be appointed by the AAA.

                        13.4.3.3 The arbitrator shall not have any current or
                                 past substantial business, financial, or
                                 personal relationships with either Party (or
                                 their Affiliates) and shall not be a vendor,
                                 supplier, customer, employee, consultant, or
                                 competitor to either of the Parties or their
                                 Affiliates.

                        13.4.3.4 The arbitrator shall be authorized only to
                                 interpret and apply the provisions of this
                                 Agreement or any related agreements entered
                                 into under this Agreement and shall have no
                                 power to modify or change any provision of this
                                 Agreement. The arbitrator shall have no
                                 authority to award punitive or multiple damages
                                 or any damages inconsistent with this
                                 Agreement. The arbitrator shall within thirty
                                 (30) days of the conclusion of the hearing,
                                 unless such time is extended by agreement of
                                 the Parties, notify the Parties in writing of
                                 his or her decision, stating his or her reasons
                                 for such decision and separately listing his or
                                 her findings of fact and conclusions of law.
                                 Judgment on the award may be entered in

                                      27


                                 any court having jurisdiction.

        13.5    The Parties shall proceed with the arbitration expeditiously,
                and the arbitration shall be concluded within five (5) months of
                the filing of the demand for arbitration pursuant to this
                Section 13 in order that the decision may be rendered within six
                (6) months of such filing, unless the arbitrator extends such
                time at the request of a Party upon a showing of good cause or
                upon agreement of the Parties.

        13.6    Any arbitration proceedings, decision or award rendered
                hereunder and the validity, effect and interpretation of any
                arbitration agreement shall be governed by the Federal
                Arbitration Act of the United States, 9 U.S.C. (S)(S)1 et seq.

        13.7    The decision of the arbitrator shall be final and binding on
                both Parties and may be enforced in any court having
                jurisdiction over the Party against which enforcement is sought.

        13.8    The fees and expenses of the arbitrator shall be shared by the
                Parties equally, unless the decision of the arbitrator shall
                specify some other apportionment of such fees and expenses. All
                other expenses and costs of the arbitration shall be borne by
                the Party incurring the same.

14.     NATURE OF OBLIGATIONS

        14.1    Except where specifically stated in this Agreement to be
                otherwise, the duties, obligations, and liabilities of the
                Parties shall be several, not joint or collective. The
                provisions of this Agreement shall not be construed to create an
                association, trust, partnership, or joint venture; to impose a
                trust or partnership duty, obligation, or liability or agency
                relationship on or with regard to either Party.

        14.2    Nothing in this Agreement nor any action taken hereunder shall
                be construed to create any duty, liability, or standard of care
                to any person not a Party to this Agreement. Each Party shall be
                individually and severally liable for its own obligations under
                this Agreement.

        14.3    By this Agreement, neither Party dedicates any part of its
                facilities or the service provided under this Agreement to the
                public.

15.     SUCCESSORS AND ASSIGNS

        15.1    This Agreement may be assigned, without express written consent
                of the other Party, as follows:

                15.1.1  Buyer may assign this Agreement or assign or delegate
                        its rights and obligations under this Agreement, in
                        whole or in part, if such assignment is made to an
                        affiliate, parent, subsidiary, successor or any party,
                        provided that such assignee operates all or a portion of
                        the PLR or if such assignment is required by Law or
                        applicable regulations.

                                      28


        15.2    Supplier may, without the consent of Buyer, assign, transfer,
                pledge or otherwise dispose of its rights and interests
                hereunder to a trustee, lending institution, or any Person for
                the purposes of financing or refinancing the Asset Bundle,
                including upon or pursuant to the exercise of remedies under
                such financing or refinancing, or by way of assignments,
                transfers, conveyances of dispositions in lieu thereof;
                provided, however, that no such assignment or disposition shall
                relieve or in any way discharge Supplier or such permitted
                assignee from the performance of its duties and obligations
                under this Agreement. Buyer agrees to execute and deliver such
                documents as may be reasonably necessary to accomplish any such
                assignment, transfer, conveyance, pledge or disposition of
                rights hereunder for purposes of the financing or refinancing of
                the Asset Bundle, so long as Buyer's rights under this Agreement
                are not thereby materially altered, amended, diminished or
                otherwise impaired.

        15.3    Either Party may, without the consent of the other Party, assign
                this Agreement to a successor to all or substantially all of the
                assets of such Party by way of merger, consolidation, sale or
                otherwise, provided such successor assumes and becomes liable
                for all of such Party's duties and obligations hereunder
                including Section 3 hereof.

        15.4    Except as stated above, neither this Agreement nor any of the
                rights, interests, or obligations hereunder shall be assigned by
                either Party, including by operation of law, without the prior
                written consent of the other Party, said consent not to be
                unreasonably withheld. Any assignment of this Agreement in
                violation of the foregoing shall be, at the option of the
                non-assigning Party, void.

        15.5    Except as set forth above, no assignment or transfer of rights
                or obligations under this Agreement by a Party shall relieve
                said Party from full liability and financial responsibility for
                the performance thereof after any such transfer or assignment
                unless and until the transferee or assignee shall agree in
                writing to assume the obligations and duties of said Party under
                this Agreement and the other Party has consented in writing to
                such assumption; said consent not to be unreasonably withheld.

        15.6    This Agreement and all of the provisions hereof are binding
                upon, and inure to the benefit of, the Parties and their
                respective successors and permitted assigns.

                                      29


16.     REPRESENTATIONS

        16.1    Representations of the Parties. The Parties represent and
                ------------------------------
                warrant each to the other as follows:

                16.1.1  Incorporation. Buyer is a corporation duly incorporated,
                        -------------
                        validly existing and in good standing under the laws of
                        the State of Nevada. Supplier is a Nevada limited
                        liability company duly organized, validly existing and
                        in good standing under the laws of the State of Nevada.
                        Both Buyer and Supplier have all requisite corporate or
                        limited liability company power and authority to own,
                        lease and operate their material assets and properties
                        and to carry on their business as now being conducted.

                16.1.2  Authority. The Party has full corporate or limited
                        ---------
                        liability company power and authority to execute and
                        deliver this Agreement and, subject to the procurement
                        of applicable regulatory approvals, to carry out the
                        actions required of it by this Agreement. The execution
                        and delivery of this Agreement and the transactions
                        contemplated hereby have been duly and validly
                        authorized by all necessary corporate or limited
                        liability company action required on the part of the
                        Party. The Agreement has been duly and validly executed
                        and delivered by the Party and, assuming that it is duly
                        and validly executed and delivered by the other Party,
                        constitutes a legal, valid and binding agreement of the
                        Party.

                16.1.3  Compliance With Law. The Party represents and warrants
                        -------------------
                        that it is not in violation of any applicable Law, or
                        applicable regulation, which violation could reasonably
                        be expected to materially adversely affect the other
                        Party's performance of its obligations under this
                        Agreement. The Party represents and warrants that it
                        will comply with all Laws, and regulations applicable to
                        its compliance with this Agreement, non-compliance with
                        which would reasonably be expected to materially
                        adversely affect either Party's performance of its
                        obligations under this Agreement.

                16.1.4  Representations of Both Parties. The representations in
                        -------------------------------
                        this Section 16 shall continue in full force and effect
                        for the term of this Agreement.

17.     DEFAULT AND REMEDIES

        17.1    An Event of Default hereunder shall be deemed to have occurred
                upon a Party's (Defaulting Party) failure to comply with any
                material obligation imposed upon it by this Agreement. Examples
                of an Event of Default include, but are not limited to the
                following:

                (i)     Failure to make any payments due under this Agreement;

                                      30


                (ii)    Failure to deliver the Supply Amount for a period of
                        five (5) consecutive days;

                (iii)   Failure to follow the directions of a Control Area
                        Operator, ISA, EDU, WSCC, NERC, PUCN, FERC, or any
                        successor thereto where following such directions is
                        required hereunder;

                (iv)    Supplier not being in compliance with Section 3; and

                (v)     Failure of the Guarantor to be in compliance with the
                        terms of the Guarantee delivered under Section 3.1.2.

        17.2    An Event of Default shall be excused:

                17.2.1  In the event such Event of Default was caused by Force
                        Majeure provided that the Party claiming a Force Majeure
                        complies with the requirements of Section 12; and

                17.2.2  In the event such Event of Default was caused by
                        transmission and distribution outages or disruptions.

        17.3    Unless excused, in an Event of Default the Non-Defaulting Party
                shall be entitled to provide written notice (or oral notice in
                case of emergency followed by written notice) of the Event of
                Default to the Defaulting Party and to specify a cure period,
                which cure period shall be a minimum of thirty (30) days.

        17.4    If an Event of Default is not cured by the Defaulting Party
                during the cure period specified by the Non-Defaulting Party,
                the Non-Defaulting Party shall be entitled to those remedies
                which are not inconsistent with the terms of this Agreement,
                including termination and the payment of liquidated damages. A
                Defaulting Party shall not be liable to the Non-Defaulting Party
                for any punitive, consequential or incidental damages. For
                purposes of clarification, Replacement Costs shall not be
                considered consequential or incidental damages under this
                Section 17.4.

        17.5    Notwithstanding this Section 17, liquidated damages shall be
                paid to Buyer pursuant to Sections 4.2, 12, 18, and 21.

18.     FACILITY ADDITIONS AND MODIFICATIONS

        18.1    Supplier shall be entitled to make additions and modifications
                to the Asset Bundle subject to the following:

                18.1.1  To the extent additions and modifications interfere with
                        the operation of the Asset Bundle in providing the
                        Supply Amount to Buyer beyond the limits for planned
                        outages set forth in Section 21, liquidated damages
                        shall be paid to Buyer pursuant to Section 4.2.

                18.1.2  Supplier shall use reasonable efforts to minimize any
                        adverse impact on

                                      31


                        Buyer during the course of making such additions and
                        modifications.

                18.1.3  Such additions and modifications shall be conducted in
                        accordance with Good Utility Practice, and all
                        applicable Laws, regulations, reliability criteria and
                        the Interconnection Agreement between Buyer and
                        Supplier, dated October 25, 2000, as it may be amended
                        from time to time.

        18.2    Supplier shall seek Buyer's prior written approval for all
                Supplier's additions or modifications to the Asset Bundle which
                might reasonably be expected to have an adverse effect upon
                Buyer with respect to operations or performance under this
                Agreement.

19.     COORDINATION

        19.1    Upon knowledge thereof, each Party shall promptly give notice to
                the other Party of any labor dispute which is delaying or
                threatens to delay the timely performance of this Agreement,
                which shall include a description of the general nature of the
                dispute.

20.     EMERGENCY AND NONEMERGENCY CONDITION RESPONSE

        20.1    Buyer and Supplier shall comply with any applicable requirement
                of any Governmental Authority, NERC, WSCC, ISA, Control Area
                Operator, transmission operator, EDU or any successor of any of
                them, regarding the reduced or increased generation of the Asset
                Bundle in the event of an Emergency Condition or Nonemergency
                Condition.

        20.2    Supplier shall not be obligated to deliver the Supply Amount and
                no liquidated damages shall become due, if the Supply Amount is
                reduced in the event of an Emergency Condition or a Nonemergency
                Condition.


        20.3    Each Party shall provide prompt oral notice to the other Party
                of any Emergency Condition or Nonemergency Condition.

        20.4    Either Party may take reasonable and necessary action to
                prevent, avoid or mitigate injury, danger, damage or loss to its
                own equipment and facilities, or to expedite restoration of
                service; provided, however, that the Party taking such action
                shall give the other Party prior notice if at all possible
                before taking any action. However, this Section 20.4 shall not
                be construed to supersede Sections 20.2 and 20.3.

21.     OUTAGE SCHEDULING

        21.1    Supplier shall request Buyer's approval prior to any
                inspections, proposed planned outages or other non-forced
                outages (all hereinafter referred to as "planned outages") of
                the Asset Bundle so as to minimize the impact on the

                                      32


                availability of the Asset Bundle. Under no circumstances shall
                Supplier conduct a planned outage without the express prior
                consent of Buyer pursuant to this Section 21.

        21.2    Planned Outages.
                ---------------

                21.2.1  Within sixty (60) days following the Effective Date of
                        this Agreement and on or before October 1 of each
                        Contract Year, Supplier shall provide Buyer with a
                        schedule of proposed planned outages for the period
                        beginning on the date of such proposed schedule for the
                        following twelve (12) months. The proposed planned
                        outage schedule will designate days for each unit in
                        which the Asset Bundle Capacity will be reduced in part
                        or total for each such unit. Each proposed schedule
                        shall include all applicable information, including but
                        not limited to the following: Month, day and time of
                        requested outage; facilities impacted (such as Unit and
                        description); duration of outage; purpose of outage;
                        amount of capacity (in MWs) which is derated; other
                        conditions and remarks; and name of contact and phone
                        number.

                21.2.2  Buyer shall promptly review Supplier's proposed schedule
                        and shall, at Buyer's discretion, not to be unreasonably
                        exercised, either require modifications or approve the
                        proposed schedule. Supplier shall use its best efforts
                        to accomplish all planned outages in accordance with the
                        approved schedule. Supplier shall be responsible to
                        Buyer for Replacement Costs (i) if any outage period
                        exceeds its approved schedule, provided that changes to
                        the approved schedule may be requested by either Party
                        and each Party shall make reasonable efforts to
                        accommodate such changes, provided further the Buyer
                        shall have no obligation to agree to Supplier's
                        revisions to the approved planned outage schedule; and
                        (ii) if Supplier conducts a planned outage without the
                        consent of Buyer as provided herein.

22.     REPORTS

        22.1    Supplier shall promptly provide Buyer with copies of any orders,
                decrees, letters or other written communications to or from any
                Governmental Authority asserting or indicating that Supplier
                and/or its Asset Bundle is in violation of Laws which relate to
                Supplier, or operations or maintenance of the Asset Bundle and
                which may have an adverse effect on Buyer. Supplier shall use
                reasonable efforts to keep Buyer appraised of the status of any
                such matters.

23.     COMMUNICATIONS

        23.1    Supplier's Operating Representatives shall be available
                twenty-four (24) hours per day for communications with the
                Control Area Operator and/or the ISA and Buyer to facilitate the
                operations contained in this Agreement.

        23.2    Supplier shall, at its expense, maintain and install real-time
                communications

                                      33


                equipment at the Asset Bundle to maintain communications between
                personnel on site at the Asset Bundle, Buyer and the Control
                Area Operator at all times. Supplier shall provide at its
                expense:

                (i)     Ringdown voice telephone lines, and

                (ii)    Equipment to transmit to and receive telecopies from
                        Buyer and the Control Area Operator.

        23.3    Supplier shall immediately report to Buyer any "Abnormal
                Condition" that has or may occur, and provide all pertinent
                information, including but not limited to the following:

                (i)     A description of the "Abnormal Condition" and the
                        actions to be taken to alleviate the "Abnormal
                        Condition";

                (ii)    The expected duration including the beginning and ending
                        time of the "Abnormal Condition"; and

                (iii)   The amount of any adjustment to the current (real time)
                        level of Energy and Ancillary Services.

        23.4    Cause of the Condition.
                ----------------------

                23.4.1  An "Abnormal Condition" shall include without limitation
                        any conditions that, to Supplier's knowledge, have or
                        are reasonably likely to:

                        (i)     Adversely affect Supplier's ability to provide
                                Energy and Ancillary Services to Buyer;

                        (ii)    Cause an unplanned reduction in the amount of
                                delivery of Energy and Ancillary Services to
                                Buyer; or

                        (iii)   Cause an unplanned isolation of the Asset Bundle
                                from the transmission system.

        23.5    Supplier shall immediately notify Buyer after such "Abnormal
                Condition" has been alleviated.

24.     NOTICES

        24.1    All notices hereunder shall, unless specified otherwise, be in
                writing and shall be addressed, except as otherwise stated
                herein, to the Parties as set forth in Exhibit F.

        24.2    All written notices or submittals required by this Agreement
                shall be sent either by hand-delivery, regular first class U.S.
                mail, registered or certified U.S. mail

                                      34


                postage paid return receipt requested, overnight courier
                delivery, electronic mail or facsimile transmission and will be
                effective and deemed to have been received on the date of
                receipt personally, on the date and time as documented by method
                of delivery if during normal business hours or on the next
                succeeding Business Day, or on the third (3rd) Business Day
                following deposit with the U.S. mail if sent regular first class
                U.S. mail.

        24.3    Notices of an Event of Default pursuant to Section 17 and or
                Force Majeure pursuant to Section 12 may not be sent by regular
                first class U.S. mail.

        24.4    Any payments required to be made under this Agreement shall be
                made to the Party as set forth in Exhibit F.

        24.5    Each Party shall have the right to change, at any time upon
                written notice to the other Party, the name, address and
                telephone numbers of its representatives under this Agreement
                for purposes of notices and payments.

25.     MERGER

        25.1    The Agreement contains the entire agreement and understanding
                between the Parties with respect to all of the subject matter
                contained herein, thereby merging and superseding all prior
                agreements and representations by the Parties with respect to
                such subject matter.

        25.2    In the event of any conflict between this Agreement and the
                Asset Sale Agreement, the terms of the Asset Sale Agreement
                shall govern.

26.     HEADINGS

        26.1    The headings or section titles contained in this Agreement are
                inserted solely for convenience and do not constitute a part of
                this Agreement between the Parties, nor should they be used to
                aid in any manner in the construction of this Agreement.

27.     COUNTERPARTS AND INTERPRETATION

        27.1    This Agreement may be executed in any number of counterparts,
                each of which shall be deemed an original.

        27.2    In the event an ambiguity or question of intent or
                interpretation arises, this Agreement shall be construed as if
                drafted jointly by the Parties and no presumption or burden of
                proof shall arise favoring or disfavoring any Party by virtue of
                authorship of any of the provisions of this Agreement.

        27.3    Any reference to any federal, state, local, or foreign statute
                or law shall be deemed also to refer to all rules and
                regulations promulgated thereunder, unless the context requires
                otherwise.

                                      35


        27.4    The word "including" in this Agreement shall mean "including
                without limitation".

28.     SEVERABILITY

        28.1    If any term, provision or condition of this Agreement is held to
                be invalid, void or unenforceable by a court or Governmental
                Authority of competent jurisdiction and such holding is subject
                to no further appeal or judicial review, then such invalid,
                void, or unenforceable term, provision or condition shall be
                deemed severed from this Agreement and all remaining terms,
                provisions and conditions of this Agreement shall continue in
                full force and effect, unless, however, the effect of the
                severance would vitiate the intent of the Parties hereto, as
                determined by either Party in its reasonable discretion.

        28.2    The Parties shall endeavor in good faith to replace such
                invalid, void, or unenforceable provisions with a valid and
                enforceable provision which achieves the purposes intended by
                the Parties to the greatest extent permitted by law.

29.     WAIVERS

        29.1    No failure or delay on the part of a Party in exercising any of
                its rights under this Agreement or in insisting upon strict
                performance of provisions of this Agreement, no partial exercise
                by either Party of any of its rights under this Agreement, and
                no course of dealing between the Parties shall constitute a
                waiver of the rights of either Party under this Agreement. Any
                waiver shall be effective only by a written instrument signed by
                the Party granting such waiver, and such shall not operate as a
                waiver of, or estoppel with respect to, any subsequent failure
                to comply therewith.

30.     AMENDMENTS

        30.1    The Parties shall negotiate in good faith to determine necessary
                amendments, if any, to this Agreement, provided that in
                negotiating such amendments the Parties shall attempt, in good
                faith, to reasonably preserve the bargain initially struck in
                this Agreement if any Governmental Authority, FERC, any state or
                the PUCN, implements a change in any Law or applicable
                regulation that materially affects or is reasonably expected to
                materially affect Buyer's PLR service under this Agreement.

        30.2    The Parties shall meet to discuss the impact of any changes in
                Buyer's OATT or the ISA's OATT, as applicable, or any rule or
                practice of NERC, WSCC, or any other Governmental Authority on
                the terms of this Agreement upon request by either Party during
                the term of this Agreement.

        30.3    In the event that it is deemed necessary to amend this
                Agreement, the Parties will attempt to agree upon such amendment
                and will submit such mutually agreed upon amendment(s) to the
                FERC for filing and acceptance.

                                      36


        30.4    Amendments to this Agreement shall be in writing and shall be
                executed by an authorized representative of each Party.

31.     TIME IS OF THE ESSENCE

        31.1    Time is of the essence of this Agreement and in the performance
                of all of the covenants and conditions hereof.

32.     APPROVALS

        32.1    Each Party's performance under this Agreement is subject to the
                condition that all requisite governmental and regulatory
                approvals for such performance are obtained in form and
                substance satisfactory to the other Party in its reasonable
                discretion. Each Party shall use best efforts to obtain all
                required approvals and shall exercise due diligence and shall
                act in good faith to cooperate and assist each other in
                acquiring any regulatory approval necessary to effectuate this
                Agreement. Further, the Parties agree to reasonably support the
                other Party in any associated regulatory proceedings, including
                by being a witness on behalf of the other Party.

        32.2    Notwithstanding the provisions of Section 2.2.2 of this
                Agreement, if any Governmental Authority in its review of the
                Agreement places conditions on or requires revisions of the
                Agreement which do not have a material adverse effect on
                Supplier or Buyer, the Parties agree to execute an amendment to
                the Agreement reasonably acceptable to each Party incorporating
                such conditions or revisions.

        32.3    This Agreement is made subject to present or future state or
                federal laws, regulations, or orders properly issued by state or
                federal bodies having jurisdiction.

        32.4    The Parties hereto agree to execute and deliver promptly, at the
                expense of the Party requesting such action, any and all other
                and further instruments, documents and information which may
                reasonably be necessary or appropriate to give full force and
                effect to the terms and intent of this Agreement.

33.     PLR SERVICE

        33.1    The Agreement is premised on Buyer providing PLR service.
                Notwithstanding anything to the contrary contained herein, if
                Nevada retail electricity restructuring (including
                implementation of retail customer choice of electricity
                suppliers) is delayed beyond the Effective Date of this
                Agreement, the Parties shall continue to perform this Agreement
                in all respects pursuant to the terms and conditions hereof as
                if Buyer was the PLR and Buyer's retail and wholesale customers
                shall be considered as the TRR.

34.     CONFIDENTIALITY

        34.1    Confidential Information. Certain information provided by a
                ------------------------
                Party (the

                                      37


                "Disclosing Party") to the other Party (the "Receiving Party")
                in connection with the negotiation or performance of this
                Agreement may be considered confidential and/or proprietary
                (hereinafter referred to as "Confidential Information") by the
                Disclosing Party. To be considered Confidential Information
                hereunder, such information must be clearly labeled or
                designated by the Disclosing Party as "confidential" or
                "proprietary" or with words of like meaning. If disclosed
                orally, such information shall be clearly identified as
                confidential and such status shall be confirmed promptly
                thereafter in writing.

        34.2    Treatment of Confidential Information. The Receiving Party shall
                -------------------------------------
                treat any Confidential Information with at least the same degree
                of care regarding its secrecy and confidentiality as the
                Receiving Party's similar information is treated within the
                Receiving Party's organization. The Receiving Party shall not
                disclose the Confidential Information of the Disclosing Party to
                third parties (except as stated hereinafter) nor use it for any
                purpose other than the negotiation or performance of this
                Agreement, without the express prior written consent of the
                Disclosing Party. The Receiving Party further agrees that it
                shall restrict disclosure of Confidential Information as
                follows:

                34.2.1  Disclosure shall be restricted solely to its agents as
                        may be necessary to enforce the terms of this Agreement
                        after advising those agents of their obligations under
                        this Section 34.2.

                34.2.2  In the event that the Receiving Party is requested,
                        pursuant to or as required by applicable Law or by legal
                        process, to disclose any Confidential Information, the
                        Receiving Party shall provide the Disclosing Party with
                        prompt notice of such request or requirement in order to
                        enable Disclosing Party to seek an appropriate
                        protective order or other remedy and to consult with
                        Disclosing Party with respect to Disclosing Party taking
                        steps to resist or narrow the scope of such request or
                        legal process. The Receiving Party agrees not to oppose
                        any action by the Disclosing Party to obtain a
                        protective order or other appropriate remedy. In the
                        absence of such protective order, and provided that the
                        Receiving Party is advised by its counsel that it is
                        compelled to disclose the Confidential Information, the
                        Receiving Party shall:

                        (i)     furnish only that portion of the Confidential
                                Information which the Receiving Party is advised
                                by counsel is legally required; and

                        (ii)    use its commercially reasonable best efforts, at
                                the expense of the Disclosing Party, to ensure
                                that all Confidential Information so disclosed
                                will be accorded confidential treatment.

        34.3    Excluded Information. Confidential Information shall not be
                --------------------
                deemed to include the following:

                34.3.1  information which is or becomes generally available to
                        the public other

                                      38


                        than as a result of a disclosure by the Receiving Party;

                34.3.2  information which was available to the Receiving Party
                        on a non-confidential basis prior to its disclosures by
                        the Disclosing Party; and

                34.3.3  information which becomes available to the Receiving
                        Party on a non-confidential basis from a person other
                        than the Disclosing Party or its representative who is
                        not otherwise bound by a confidentiality agreement with
                        Disclosing Party or its agent or is otherwise not under
                        any obligation to Disclosing party or its agent not to
                        disclose the information to the Receiving Party.

        34.4    Injunctive Relief Due to Breach. The Parties agree that remedies
                -------------------------------
                at law may be inadequate to protect each other in the event of a
                breach of this Section 34, and the Receiving Party hereby in
                advance agrees that the Disclosing Party shall be entitled to
                seek and obtain, without proof of actual damages, temporary,
                preliminary and permanent injunctive relief from any court or
                Governmental Authority of competent jurisdiction restraining the
                Receiving Party from committing or continuing any breach of this
                Section 34.

35.     CHOICE OF LAW

        35.1    This Agreement and the rights and obligations of the Parties
                shall be construed and governed by the Laws of: (i) the State of
                Nevada as if executed and performed wholly within that state;
                and (ii) the Federal Power Act, to the extent the rights and
                obligations of the Parties are covered by such act.



IN WITNESS WHEREOF, the Parties hereto have caused this Agreement to be executed
by their duly authorized representative on the date set forth below.



SIERRA PACIFIC POWER COMPANY                     WPS NORTHERN NEVADA, LLC

                                                 By: WPS POWER
                                                 DEVELOPMENT, INC.
                                                 (Its Sole Member)


By:                                             By:
         ------------------------------                -----------------------
         William E. Peterson                           Gerald L. Mroczkowski

Title:   Senior Vice President, General         Title: Vice President
         Counsel, and Corporate Secretary

Date:    October 25, 2000                       Date:  October 25, 2000

                                      39


                                    EXHIBIT A
                                  TRACY BUNDLE
                 ASSET BUNDLE CAPACITY AND OPERATING PARAMETERS



                                                  NET                         MINIMUM HOURLY
                              NET SUMMER         WINTER        RAMP           ENERGY TAKE
                              CAPABILITY      CAPABILITY       RATE
         UNIT                   (MW)            (MW)          (MW/hr)             (MWh)
- -----------------------------------------------------------------------------------------------
                                                                  
Tracy Unit 1                         53              53            40                       21
Tracy Unit 2                         83              83            40                       25
Tracy Unit 3                        108             108            40                       20
Tracy Unit 4 & 5                     89              93            40
Clark Mt.. 1                         10              11            11
Clark Mt.. 2                         10              11            11
Clark Mt.. 3                         69              84            40
Clark Mt.. 4                         69              84            40
Valley Road 1                         2               2             2
Valley Road 2                         2               2             2
Valley Road 3                         2               2             2
Brunswick 1                           2               2             2
Brunswick 2                           2               2             2
Brunswick 3                           2               2             2
Gabbs 1                               2               3             3
Gabbs 2                               2               3             3
- -----------------------------------------------------------------------------------------------
Total                               507             545           280                       66
===============================================================================================


                    Minimum Annual Energy Take: 2,200,000 MWh

                      Limit on Excused Energy:*    12,000 MWh


The summer months shall consist of the months of June through September.

The winter months shall consist of the months of January through May and the
months of October through December.

* The Limit on Excused Energy is an annual figure, to be prorated in any
Contract Year that is less than a twelve month period.

                                      A-1


                                   EXHIBIT B
                                 TRACY BUNDLE
                      ENERGY AND ANCILLARY SERVICE PRICES

Energy Prices*
- --------------

Price Floor of Energy:         $  25.42 per MWh
Price Ceiling of Energy:       $  42.92 per MWh

Ancillary Service Prices*
- -------------------------

        Regulation and Frequency Response:

                       On-Peak: $  12.40 per MW-reserved per hour
                      Off-Peak: $   7.09 per MW-reserved per hour

        Operating Reserve- Spinning Reserve:

                       On-Peak: $  16.15 per MW-reserved per hour
                      Off-Peak: $   9.23 per MW-reserved per hour

        Operating Reserve- Supplemental Reserve:

                       On-Peak: $  10.75 per MW-reserved per hour
                      Off-Peak: $   6.14 per MW-reserved per hour

The On-Peak periods shall consist of Hour Ending (HE) 0700 through HE 2200 PPT,
Monday through Saturday. The Off-Peak periods shall consist of HE 0100 through
HE 0600, HE 2300 and HE 2400 PPT, Monday through Saturday; HE 0100 through HE
2400 PPT Sunday and additional Off-Peak days (holidays) as designated annually
by the WSCC.

                                                     *  SUBJECT TO FERC APPROVAL
                                                     ---------------------------

                                      B-1


                                    EXHIBIT C
                                  TRACY BUNDLE
                           SUPPLIER'S MONTHLY INVOICE

         A          Price Ceiling of Energy          $        42.92  /MWh
         B          Price Floor of Energy            $        25.42  /Mwh

MONTH 1 - ENERGY
- ----------------



                           C                D              E                F                 G                   H

     Dispatch         Asset Bundle      Delivered       Supplier       Market Price     Market Price x      Market Price x
       Hour          Capacity (MWh)   Energy (MWh)  Shortfall (MWh)  of Energy ($/MWh)  Delivered Energy Asset Bundle Capacity
       ----          --------------   ------------  ---------------  -----------------  ---------------- ---------------------
                                                                                       
         1                507              507              0             40.00         $ 20,280.00     $     20,280.00
         2                507              507              0             40.00           20,280.00           20,280.00
         3                507              447             60             40.00           17,880.00           20,280.00
         4                507              447             60             40.00           17,880.00           20,280.00
         5                377              367             10             30.00           11,010.00           11,310.00
         6                407              407              0             30.00           12,210.00           12,210.00
         7                497              477             20             20.00            9,540.00            9,940.00
         8                507              507              0             20.00           10,140.00           10,140.00
         9                507              507              0             20.00           10,140.00           10,140.00
        10                507              507              0             25.00           12,675.00           12,675.00
- -------------------------------------------------------------------------------------------------------------------------
                        4,830            4,680            150                          $ 142,035.00     $    147,535.00




                                                                                               
I.     Sum of (Delivered Energy times corresponding hourly Market Price)    Sec 7.2.1  $  142,035.00

   IT.     Sum of (Asset Bundle Capacity times corresponding hourly Market Price)                       $      147,535.00

J.    Sum of hourly Delivered Energy multiplied by the Price Ceiling        Sec 7.2.2  $  200,865.60
of Energy

  JT.     Sum of hourly Asset Bundle Capacity multiplied by the Price Ceiling of Energy                 $      207,303.60

K.    Sum of hourly Delivered Energy multiplied by the Price Floor         Sec 7.2.3  $  118,965.60
of Energy

          KT.     Sum of hourly Asset Bundle Capacity multiplied by the Price Floor of Energy           $      122,778.60

L.    Invoiced Amount - Energy                  Sec 7.3   (K less than I less than J) $  142,035.00

M.    Theoretical Amount for Expected Performance         (KT less than IT less than JT)                $      147,535.00


MONTH 1 - ANCILLARY SERVICE CAPACITY - REGULATION AND FREQUENCY RESPONSE
- ------------------------------------------------------------------------



                           N                O              P                Q                 R                   S

                      Schedule of       Ancillary                                          Price x
     Dispatch          Ancillary        Capacity        Supplier    Capacity Price of     Ancillary        Price x Schedule

                                                                                           Capacity
       Hour          Capacity (MW)    Supplied (MW)  Shortfall (MW)  Services ($/MW)       Supplied     of Ancillary Services
       ----          -------------    -------------  --------------  ---------------       --------     ---------------------
                                                        (N - O)                            (O x Q)             (N x Q)

                                                                                      
         1                 0                0              0               7.09        $     0.00       $        0.00
         2                 0                0              0               7.09              0.00                0.00
         3                 0                0              0              12.40              0.00                0.00
         4                 0                0              0              12.40              0.00                0.00
         5                30               30              0              12.40            372.00              372.00
         6                 0                0              0              12.40              0.00                0.00
         7                 0                0              0              12.40              0.00                0.00
         8                 0                0              0              12.40              0.00                0.00
         9                 0                0              0              12.40              0.00                0.00
        10                 0                0              0              12.40              0.00                0.00
- -----------------------------------------------------------------------------------------------------------------------
                           30              30              0                           $    372.00      $        372.00




                                                                                 
T.    Invoiced Amount - Ancillary Service Capacity -                Sec 7.2.5          $    372.00
       Regulation and Frequency Response

U.    Theoretical Amount for Expected Performance                                                       $        372.00


                                      C-1


                                    EXHIBIT C
                                  TRACY BUNDLE
                           SUPPLIER'S MONTHLY INVOICE

MONTH 1 - ANCILLARY SERVICE CAPACITY - SPINNING RESERVE
- -------------------------------------------------------



                           V                W              X                Y                 Z                   AA

                      Schedule of       Ancillary                                          Price x
     Dispatch          Ancillary        Capacity        Supplier    Capacity Price of     Ancillary        Price x Schedule

                                                                                           Capacity
       Hour          Capacity (MW)    Supplied (MW)  Shortfall (MW)  Services ($/MW)       Supplied     of Ancillary Services
       ----          -------------    -------------  --------------  ---------------       --------     ---------------------
                                                        (V - W)                            (W x Y)             (V x Y)

                                                                                     
         1                 0                0              0               9.23        $     0.00       $        0.00
         2                 0                0              0               9.23              0.00                0.00
         3                 0                0              0              16.15              0.00                0.00
         4                 0                0              0              16.15              0.00                0.00
         5                80               80              0              16.15          1,292.00            1,292.00
         6                80               60             20              16.15            969.00            1,292.00
         7                 0                0              0              16.15              0.00                0.00
         8                 0                0              0              16.15              0.00                0.00
         9                 0                0              0              16.15              0.00                0.00
        10                 0                0              0              16.15              0.00                0.00
- ------------------------------------------------------------------------------------------------------------------------
                         160              140             20                           $ 2,261.00      $     2,584.00



                                                                                 
AB.    Invoiced Amount - Ancillary Service Capacity - Spinning      Sec 7.2.5          $   2,261.00
Reserve

AC.    Theoretical Amount for Expected Performance                                                      $       2,584.00



MONTH 1 - ANCILLARY SERVICE CAPACITY - SUPPLEMENTAL RESERVE
- -----------------------------------------------------------

                           AD              AE              AF               AG                AH                  AI

                      Schedule of       Ancillary                                          Price x
     Dispatch          Ancillary        Capacity        Supplier    Capacity Price of     Ancillary        Price x Schedule

                                                                                           Capacity
       Hour          Capacity (MW)    Supplied (MW)  Shortfall (MW)  Services ($/MW)       Supplied     of Ancillary Services
       ----          -------------    -------------  --------------  ---------------       --------     ---------------------

                                                       (AD - AE)                          (AE x AG)           (AD x AG)

                                                                                      
         1                 0                0              0               6.14        $     0.00       $        0.00
         2                 0                0              0               6.14              0.00                0.00
         3                 0                0              0              10.75              0.00                0.00
         4                 0                0              0              10.75              0.00                0.00
         5                10               10              0              10.75            107.50              107.50
         6                10               10              0              10.75            107.50              107.50
         7                10               10              0              10.75            107.50              107.50
         8                 0                0              0              10.75              0.00                0.00
         9                 0                0              0              10.75              0.00                0.00
        10                 0                0              0              10.75              0.00                0.00
- -----------------------------------------------------------------------------------------------------------------------
                          30               30              0                           $   322.50       $      322.50



                                                                                 
AJ.    Invoiced Amount - Ancillary Service Capacity - Supplemental  Sec 7.2.5          $    322.50
Reserve

AK.    Theoretical Amount for Expected Performance                                                      $        322.50

MONTH 1 - ANCILLARY SERVICE ENERGY
- ----------------------------------



                           AL              AM              AN               AO                AP                  AQ

                      Schedule of       Ancillary                                          Price x
     Dispatch          Ancillary         Energy         Supplier     Price Ceiling of     Ancillary        Price x Schedule

       Hour           Energy (MWh    Supplied (MWh) Shortfall(MWh)    Energy ($/MWh)   Energy Supplied   of Ancillary Energy
       ----           -----------    -------------- --------------    --------------   ---------------   -------------------
                                                       (AL - AM)                          (AM x AO)           (AL x AO)

                                                                                      
         1                 0                0              0              42.92        $     0.00       $        0.00
         2                 0                0              0              42.92              0.00                0.00
         3                 0                0              0              42.92              0.00                0.00



                           C-2


                                    EXHIBIT C
                                  TRACY BUNDLE
                           SUPPLIER'S MONTHLY INVOICE



                                                                                      
         4                 0                0              0              42.92              0.00                0.00
         5                40               40              0              42.92          1,716.80            1,716.80
         6                30               10             20              42.92            429.20            1,287.60
         7                10               10              0              42.92            429.20              429.20
         8                 0                0              0              42.92              0.00                0.00
         9                 0                0              0              42.92              0.00                0.00
        10                 0                0              0              42.92              0.00                0.00
- ------------------------------------------------------------------------------------------------------------------------
                          80               60             20        $    429.20      $   2,575.20     $      3,433.60


                                                                                               
AR.    Invoiced Amount - Ancillary Services Energy   Sec 7.2.6                         $   2,575.20

AS.    Theoretical Amount for Expected Performance                                                      $       3,433.60


MONTH 1 - TOTAL INVOICE AMOUNT                       Sec 7.3         (L + T + AB + AJ  $  147,565.70
                                                                          + AR)
===============================================================================================================================

MONTH 2 - ENERGY
- ----------------

                           C                D              E                F                 G                   H

     Dispatch         Asset Bundle      Delivered       Supplier       Market Price     Market Price x      Market Price x

       Hour          Capacity (MWh)   Energy (MWh)  Shortfall (MWh) of Energy ($/MWh)  Delivered Energy   Asset Bundle Cap.
       ----          --------------   ------------  --------------- -----------------  ----------------   -----------------

                                                        (C - D)                            (D x F)             (C x F)

         1                507              507              0             45.00        $  22,815.00     $     22,815.00
         2                507              507              0             45.00           22,815.00           22,815.00
         3                507              447             60             45.00           20,115.00           22,815.00
         4                507              447             60             55.00           24,585.00           27,885.00
         5                377              367             10             55.00           20,185.00           20,735.00
         6                407              407              0             55.00           22,385.00           22,385.00
         7                497              477             20             35.00           16,695.00           17,395.00
         8                507              507              0             35.00           17,745.00           17,745.00
         9                507              507              0             35.00           17,745.00           17,745.00
        10                507              507              0             40.00           20,280.00           20,280.00
- -------------------------------------------------------------------------------------------------------------------------
                        4,830            4,680            150                          $ 205,365.00     $    212,615.00



                                                                                               
I.     Sum of (Delivered Energy times corresponding hourly Market   Sec 7.2.1          $  205,365.00
Price)

   IT.     Sum of (Asset Bundle Capacity times corresponding                                            $      212,615.00
hourly Market Price)

J.     Sum of hourly Delivered Energy multiplied by the Price       Sec 7.2.2          $  200,865.60
Ceiling of Energy

  JT.     Sum of hourly Asset Bundle Capacity multiplied by the Price Ceiling of                        $      207,303.60
Energy

K.     Sum of hourly Delivered Energy multiplied by the Price       Sec 7.2.3          $  118,965.60
Floor of Energy

    KT.     Sum of hourly Asset Bundle Capacity multiplied by the Price Floor of                        $      122,778.60
Energy

L.    Invoiced Amount - Energy                       Sec 7.3  (I greater than J)       $  200,865.60

M.    Theoretical Amount for Expected Performance                       (IT greater than JT)            $      207,303.60


MONTH 3 - ENERGY
- ----------------



                           C                D              E                F                 G                   H


     Dispatch         Asset Bundle      Delivered       Supplier       Market Price      Market Price x      Market Price x

       Hour          Capacity (MWh)   Energy (MWh)  Shortfall (MWh)  of Energy ($/MWh)  Delivered Energy   Asset Bundle Cap.
       ----          --------------   ------------  ---------------  -----------------  ----------------   -----------------

                                                        (C - D)                            (D x F)             (C x F)

                                                                                      
         1                507              507              0             30.00        $  15,210.00     $     15,210.00
         2                507              507              0             20.00           10,140.00           10,140.00
         3                507              447             60             20.00            8,940.00           10,140.00


                                      C-3


                                   EXHIBIT C
                                  TRACY BUNDLE
                           SUPPLIER'S MONTHLY INVOICE

                                                                                            
         4                507              447             60             20.00            8,940.00           10,140.00
         5                377              367             10             15.00            5,505.00            5,655.00
         6                407              407              0             15.00            6,105.00            6,105.00
         7                497              477             20             15.00            7,155.00            7,455.00
         8                507              507              0             15.00            7,605.00            7,605.00
         9                507              507              0             15.00            7,605.00            7,605.00
        10                507              507              0             15.00            7,605.00            7,605.00
- -------------------------------------------------------------------------------------------------------------------------
                        4,830            4,680            150                          $  84,810.00    $      87,660.00



                                                                                               
I.     Sum of (Delivered Energy times corresponding hourly Market   Sec 7.2.1          $   84,810.00
Price)

          IT.     Sum of (Asset Bundle Capacity times corresponding hourly Market                       $       87,660.00
Price)

J.     Sum of hourly Delivered Energy multiplied by the Price       Sec 7.2.2          $  200,865.60
Ceiling of Energy

           JT.     Sum of hourly Asset Bundle Capacity multiplied by the Price                          $      207,303.60
Ceiling of Energy

K.     Sum of hourly Delivered Energy multiplied by the Price       Sec 7.2.3          $  118,965.60
Floor of Energy

          KT.     Sum of hourly Asset Bundle Capacity multiplied by the Price Floor                     $      122,778.60
of Energy

L.    Invoiced Amount - Energy                       Sec 7.3     (I less than K)       $  118,965.60

M.    Theoretical Amount for Expected Performance                (IT less than KT)                      $      122,778.60


For the purposes of this example, the portions of the monthly invoices
attributable to Ancillary Services for the second and third months were assumed
to be the same as the corresponding portions for the first month.


                                      C-4


                                   EXHIBIT D

                                 TRACEY BUNDLE

                   BUYER'S MONTHLY INVOICE-REPLACEMENT COSTS




MONTH 1 - ENERGY
- ----------------

                 A                  B*                    C*                  D
Dispatch    Replacement     Replacement Cost       Replacement Cost    Gross Replacement
 Hour       Energy (MWh)    of Energy ($/MWh)         of Energy         Cost of Energy
 ----       ------------    -----------------         ---------         --------------
                                                                         (A x B) + C
                                                           
   1             0                      na              $0.00                $0.00
   2             0                      na               0.00             2,200.00
   3            60                   35.00             100.00             1,850.00
   4            60                   30.00              50.00               350.00
   5            10                   30.00              50.00                 0.00
   6             0                      na               0.00               500.00
   7            20                   25.00               0.00                 0.00
   8             0                      na               0.00                 0.00
   9             0                      na               0.00                 0.00
   10            0                      na               0.00                 0.00
- -------------------------------------------------------------------------------------
               150                                                     $  4,900.00

E. Gross Replacement Cost of Energy                                    $  4,900.00

F. Theoretical Supplier's Invoice for Expected Performance             $147,535.00

G. Actual Supplier's Invoice Amount                                     142,035.00
                                                                       -----------
H. Avoided Payment to Supplier                          (F-G)          $  5,500.00

I. Invoiced Replacement Cost - Energy      (E is less than H)          $      0.00

MONTH 1 - ANCILLARY SERVICES CAPACITY-REGULATION AND FREQUENCY RESPONSE
- -----------------------------------------------------------------------

                 J                  K*                    L*                  M
Dispatch    Replacement     Replacement Cost       Replacement Cost    Gross Replacement
 Hour     Capacity (MWh)  of Capacity ($/MWh)        of Capacity       Cost of Capacity
 ----       ------------    -----------------         ---------         --------------
                                                                         (J x K) + L
                                                           
1                0                      na              $0.00                $0.00
2                0                      na               0.00                 0.00
3                0                      na               0.00                 0.00
4                0                      na               0.00                 0.00
5                0                      na               0.00                 0.00
6                0                      na               0.00                 0.00
7                0                      na               0.00                 0.00
8                0                      na               0.00                 0.00
9                0                      na               0.00                 0.00
10               0                      na               0.00                 0.00
- -------------------------------------------------------------------------------------
                 0                                                     $      0.00

N. Gross Replacement Cost of Ancillary Capacity-
   Regulation and Frequency Response                                   $      0.00

O. Theoretical Supplier's Invoice Amount for Expected Performance      $    372.00

P. Actual Supplier's Invoice Amount                                         372.00
                                                                       -----------

Q. Avoided Payment to Supplier                          (O-P)          $      0.00


                                      D-1


                                   EXHIBIT D
                                 TRACY BUNDLE
                  BUYER'S MONTHLY INVOICE - REPLACEMENT COSTS

MONTH 1 - ANCILLARY SERVICE CAPACITY - SPINNING RESERVE
- -------------------------------------------------------



                              R                   S *                   T *                    U
      Dispatch           Replacement        Replacement Cost      Replacement Cost     Gross Replacement
        Hour            Capacity (MW)      of Capacity ($/MW)       of Capacity        Cost of Capacity
        ----            -------------      ------------------       -----------        ----------------

                                                                           
         1                    0                            na   $       0.00         $       0.00
         2                    0                            na           0.00                 0.00
         3                    0                            na           0.00                 0.00
         4                    0                            na           0.00                 0.00
         5                    0                            na           0.00                 0.00
         6                   20                         40.00         100.00               900.00
         7                    0                            na           0.00                 0.00
         8                    0                            na           0.00                 0.00
         9                    0                            na           0.00                 0.00
        10                    0                            na           0.00                 0.00
- ---------------------------------------------------------------------------------------------------
                             20                                                      $       900.00


                                                                                  
V.     Gross Replacement Cost of Ancillary Capacity - Spinning Reserve               $       900.00

W.     Theoretical Supplier's Invoice Amount for Expected Performance                $     2,584.00

X.     Actual Supplier's Invoice Amount                                                    2,261.00

Y.     Avoided Payment to Supplier                                    (W - X)        $       323.00

MONTH 1 - ANCILLARY CAPACITY - SUPPLEMENTAL RESERVE
- ---------------------------------------------------


                              Z                   AA *                  AB *                  AC
      Dispatch           Replacement        Replacement Cost      Replacement Cost     Gross Replacement
        Hour            Capacity (MW)      of Capacity ($/MW)       of Capacity        Cost of Capacity
        ----            -------------      ------------------       -----------        ----------------
                                                                                         (Z x AA) + AB
                                                                           
         1                    0                            na   $       0.00         $       0.00
         2                    0                            na           0.00                 0.00
         3                    0                            na           0.00                 0.00
         4                    0                            na           0.00                 0.00
         5                    0                            na           0.00                 0.00
         6                    0                            na           0.00                 0.00
         7                    0                            na           0.00                 0.00
         8                    0                            na           0.00                 0.00
         9                    0                            na           0.00                 0.00
        10                    0                            na           0.00                 0.00
- -------------------------------------------------------------------------------------------------
                              0                                                      $        0.00



                                                                                  
AD.     Gross Replacement Cost of Ancillary Capacity - Supplemental Reserve          $        0.00

AE.     Theoretical Supplier's Invoice Amount for Expected Performance               $      322.50

AF.     Actual Supplier's Invoice Amount                                                    322.50
                                                                                     ---------------
AG.     Avoided Payment to Supplier                                  (AE - AF)       $        0.00


MONTH 1 - ANCILLARY SERVICE ENERGY
- ----------------------------------

                             AH                   AI *                  AJ *                  AK
      Dispatch           Replacement        Replacement Cost      Replacement Cost     Gross Replacement


                                      D-2


                                   EXHIBIT D
                                 TRACY BUNDLE
                  BUYER'S MONTHLY INVOICE - REPLACEMENT COSTS



        Hour            Energy (MWh)       of Energy ($/MWh)        of Energy **        Cost of Energy
        ----            ------------       -----------------        ------------        --------------
                                                                                        (AH x AI) + AJ
                                                                                    
         1                    0                            na   $       0.00                 0.00
         2                    0                            na           0.00                 0.00
         3                    0                            na           0.00                 0.00
         4                    0                            na           0.00                 0.00
         5                    0                            na           0.00                 0.00
         6                   20                         45.00          20.00               920.00
         7                    0                            na           0.00                 0.00
         8                    0                            na           0.00                 0.00
         9                    0                            na           0.00                 0.00
        10                    0                            na           0.00                 0.00
- ---------------------------------------------------------------------------------------------------
                             20                                                      $       920.00

                                                                                     $       920.00
                                                                               
AL.     Gross Replacement Cost of Ancillary Energy

AM.     Theoretical Supplier's Invoice Amount for Expected Performance               $     3,433.60

AN.     Actual Supplier's Invoice Amount                                                   2,575.20

AO.     Avoided Payment to Supplier                                  (AM - AN)       $       858.40

AP.     Total of Gross Replacement Costs - Ancillary Services    (N + V + AD + AL)   $     1,820.00

AQ.     Total of Avoided Payments to Supplier - Ancillary
        Services                                                 (Q + Y + AG + AO)   $     1,181.40

AR.     Invoiced Replacement Cost - Ancillary Services ***     (AP (more than) AQ)   $       638.60


MONTH 1 - TOTAL INVOICE AMOUNT                                        (I + AR)       $       638.60
===========================================================================================================

MONTH 2 - ENERGY
- ----------------


                              A                   B *                   C *                    D
      Dispatch           Replacement        Replacement Cost      Replacement Cost     Gross Replacement
        Hour            Energy (MWh)       of Energy ($/MWh)         of Energy          Cost of Energy
        ----            ------------       -----------------         ---------          --------------
                                                                                          (A x B) + C
                                                                                    
         1                    0                            na   $       0.00                 0.00
         2                    0                            na           0.00                 0.00
         3                   60                         40.00         200.00             2,600.00
         4                   60                         55.00         100.00             3,400.00
         5                   10                         48.00         200.00               680.00
         6                    0                            na           0.00                 0.00
         7                   20                         35.00         300.00             1,000.00
         8                    0                            na           0.00                 0.00
         9                    0                            na           0.00                 0.00
        10                    0                            na           0.00                 0.00
- ----------------------------------------------------------------------------------------------------
                             150                                                     $      7,680.00


                                                                                  
E.     Gross Replacement Cost of Energy                                              $      7,680.00

F.     Theoretical Supplier's Invoice Amount for Expected Performance                $    207,303.60

G.     Actual Supplier's Invoice Amount                                                   200,865.60
                                                                                     ---------------
H.     Avoided Payment to Supplier                                    (F - G)        $      6,438.00

I.     Invoiced Replacement Cost - Energy                   (E (more than) H)        $      1,242.00


MONTH 3 - ENERGY
- ----------------


                                      D-3


                                   EXHIBIT D
                                 TRACY BUNDLE
                  BUYER'S MONTHLY INVOICE - REPLACEMENT COSTS


                              A                   B *                   C *                    D
      Dispatch           Replacement        Replacement Cost      Replacement Cost     Gross Replacement
        Hour            Energy (MWh)       of Energy ($/MWh)         of Energy          Cost of Energy
        ----            ------------       -----------------         ---------          --------------
                                                                                          (A x B) + C
                                                                             
         1                    0                     na          $       0.00                 0.00
         2                    0                     na                  0.00                 0.00
         3                   60                  28.00                100.00             1,780.00
         4                   60                  24.00                 50.00             1,490.00
         5                   10                  24.00                  0.00               240.00
         6                    0                     na                  0.00                 0.00
         7                   20                  24.00                 50.00               530.00
         8                    0                     na                  0.00                 0.00
         9                    0                     na                  0.00                 0.00
         10                   0                     na                  0.00                 0.00
- --------------------------------------------------------------------------------------------------
                            150                                                     $    4,040.00


E.     Gross Replacement Cost of Energy                                             $    4,040.00

F.     Theoretical Supplier's Invoice Amount for Expected Performance               $  122,778.60

G.     Actual Supplier's Invoice Amount                                                118,965.60
                                                                                  ---------------
H.     Avoided Payment to Supplier                                    (F - G)       $    3,813.00

I.     Invoiced Replacement Cost - Energy                   (E (more than) H)       $      227.00


For the purposes of this example, the portions of the monthly invoices
attributable to Ancillary Services for the second and third months were assumed
to be the same as the corresponding portions for the first month.

* Replacement Costs will be directly assigned whenever causal relationships can
be established; otherwise allocations will be based upon the average of costs
that have not been directly assigned.

** Net of Transaction Costs that Buyer would have incurred if Supplier had
performed.

*** If AQ is equal to AP, the invoiced replacement cost for Ancillary Services
for the month will be zero. If AQ is greater than AP, a credit, which is equal
to AQ minus AP, will be carried forward to subsequent months during the Contract
Year and applied against any Replacement Costs for Ancillary Services that would
otherwise have been billed to Supplier. The total of all Replacements Costs for
Ancillary Services billed to Supplier during each Contract Year shall not be
less than zero.

                                      D-4


                                   EXHIBIT E
                                 TRACY BUNDLE
                           YEAR END TRUE-UP INVOICE

       A        Price Ceiling of Energy              $       42.92  /MWh
       B        Price Floor of Energy                $       25.42  /MWh

EXAMPLE 1
- ---------



                       C                 D                    E                   F                    G
                   Delivered       Market Price x      Price Ceiling x      Price Floor x     Supplier's Invoiced
     Month       Energy (MWh)     Delivered Energy    Delivered Energy     Delivered Energy     Amount - Energy
     -----       ------------     ----------------    ----------------     ----------------     ---------------
                                                           (A x C)             (B x C)
                                                                               
       1             4,680      $    142,035.00      $   200,865.60      $    118,965.60      $    142,035.00
       2             4,680           205,365.00          200,865.60           118,965.60           200,865.60
       3             4,680            84,810.00          200,865.60           118,965.60           118,965.60
       4             5,070           253,500.00          217,604.40           128,879.40           217,604.40
       5             5,070           233,220.00          217,604.40           128,879.40           217,604.40
       6             4,870           224,020.00          209,020.40           123,795.40           209,020.40
       7             5,070           243,360.00          217,604.40           128,879.40           217,604.40
       8             5,070           233,220.00          217,604.40           128,879.40           217,604.40
       9             4,530           212,910.00          194,427.60           115,152.60           194,427.60
      10             5,070           223,080.00          217,604.40           128,879.40           217,604.40
      11             5,070           268,710.00          217,604.40           128,879.40           217,604.40
      12             4,770           228,960.00          204,728.40           121,253.40           204,728.40
- -----------------------------------------------------------------------------------------------------------------
     Total          58,630      $  2,553,190.00      $ 2,516,399.60      $  1,490,374.60      $  2,375,669.00


(Total of Column D) (more than) (Total of Column E) therefore Annual True-up
calculated under Section 7.5.1(a)


                                                                                                   
H.    Annual True-up - Delivered Energy                                  (Total E - Total G)          $140,730.60


I.    Average Cost of Delivered Energy after True-up ($/MWh)             (Total E / Total C)               $42.92





                       J                 K                    L                   M                    N
                                                                                                   Invoiced
                  Replacement    Replacement Energy   Gross Replacement  Adjusted Replacement     Replacement
     Month       Energy (MWh)      x Average Cost      Cost of Energy       Cost of Energy      Cost of Energy
     -----       ------------      --------------      --------------       --------------      --------------
                                      (I x J)
                                                                                      
       1              150                            $    4,900.00                                $        0.00
       2              150                                 7,680.00                                     1,242.00
       3              150                                 4,040.00                                       227.00
       4               0                                      0.00                                         0.00
       5               0                                      0.00                                         0.00
       6               0                                      0.00                                         0.00
       7               0                                      0.00                                         0.00
       8               0                                      0.00                                         0.00
       9               0                                      0.00                                         0.00
      10               0                                      0.00                                         0.00
      11               0                                      0.00                                         0.00
      12               0                                      0.00                                         0.00
- -----------------------------------------------------------------------------------------------------------------
     Total            450       $     19,314.00      $   16,620.00           $        0.00        $    1,469.00



                                                                                           
O.    Annual True-up - Replacement Costs                                 (Total N - Total M)      $    1,469.00


                                      E-1


                                   EXHIBIT E
                                 TRACY BUNDLE
                           YEAR END TRUE-UP INVOICE


                                                                                                   
Total Annual True-up *                                                         (H + O)                $142,199.60
==================================================================================================================

EXAMPLE 2
- ---------


                       C                 D                    E                   F                    G
                   Delivered       Market Price x      Price Ceiling x      Price Floor x     Supplier's Invoiced
     Month       Energy (MWh)     Delivered Energy    Delivered Energy     Delivered Energy     Amount - Energy
     -----       ------------     ----------------    ----------------     ----------------     ---------------
                                                           (A x C)             (B x C)

                                                                               
       1             4,680      $    142,035.00      $   200,865.60     $     118,965.60      $   142,035.00
       2             4,680           205,365.00          200,865.60           118,965.60          200,865.60
       3             4,680            84,810.00          200,865.60           118,965.60          118,965.60
       4             5,070           192,660.00          217,604.40           128,879.40          192,660.00
       5             5,070           172,380.00          217,604.40           128,879.40          172,380.00
       6             4,870           165,580.00          209,020.40           123,795.40          165,580.00
       7             5,070           182,520.00          217,604.40           128,879.40          182,520.00
       8             5,070           212,940.00          217,604.40           128,879.40          212,940.00
       9             4,530           194,790.00          194,427.60           115,152.60          194,427.60
      10             5,070           202,800.00          217,604.40           128,879.40          202,800.00
      11             5,070           248,430.00          217,604.40           128,879.40          217,604.40
      12             4,770           228,960.00          204,728.40           121,253.40          204,728.40
- -----------------------------------------------------------------------------------------------------------------
     Total          58,630      $  2,233,270.00      $ 2,516,399.60     $   1,490,374.60      $ 2,207,506.60


(Total of Column E) (more than) (Total of Column D) therefore Annual True-up
- ----------------------------------------------------------------------------
calculated under Section 7.5.1(b)
- ---------------------------------


                                                                                           
H.    Annual True-up - Delivered Energy                                  (Total D - Total G)  $         25,763.40

I.    Average Cost of Delivered Energy after True-up ($/MWh)             (Total D / Total C)               $38.09




                       J                 K                    L                   M                      N

                  Replacement    Replacement Energy   Gross Replacement  Adjusted Replacement  Invoiced Replacement
     Month       Energy (MWh)      x Average Cost      Cost of Energy       Cost of Energy        Cost of Energy
     -----       ------------      --------------      --------------       --------------        --------------
                                      (I x J)
                                                                                       
       1              150                            $     4,900.00                             $              0.00
       2              150                                  7,680.00                                        1,242.00
       3              150                                  4,040.00                                          227.00
       4               0                                       0.00                                            0.00
       5               0                                       0.00                                            0.00
       6               0                                       0.00                                            0.00
       7               0                                       0.00                                            0.00
       8               0                                       0.00                                            0.00
       9               0                                       0.00                                            0.00
      10               0                                       0.00                                            0.00
      11               0                                       0.00                                            0.00
      12               0                                       0.00                                            0.00
- -------------------------------------------------------------------------------------------------------------------
     Total            450       $     17,140.91      $ 16,620.00            $          0.00     $          1,469.00



                                                                                          
O.    Annual True-up - Replacement Costs                                 (Total N - Total M)    $          1,469.00

===================================================================================================================

                                      E-2


                                   EXHIBIT E
                                 TRACY BUNDLE
                           YEAR END TRUE-UP INVOICE


                                                                                           
Total Annual True-up *                                                         (H + O)        $         27,232.40
==================================================================================================================

EXAMPLE 3
- ---------


                       C                 D                    E                   F                    G
                   Delivered       Market Price x      Price Ceiling x      Price Floor x     Supplier's Invoiced
     Month       Energy (MWh)     Delivered Energy    Delivered Energy     Delivered Energy     Amount - Energy
     -----       ------------     ----------------    ----------------     ----------------     ---------------
                                                           (A x C)             (B x C)
                                                                               
       1             4,680      $    142,035.00      $    200,865.60     $     118,965.60     $    142,035.00
       2             4,680           205,365.00           200,865.60           118,965.60          200,865.60
       3             4,680            84,810.00           200,865.60           118,965.60          118,965.60
       4             5,070           162,240.00           217,604.40           128,879.40          162,240.00
       5             5,070           152,100.00           217,604.40           128,879.40          152,100.00
       6             4,870           136,360.00           209,020.40           123,795.40          136,360.00
       7             5,070           141,960.00           217,604.40           128,879.40          141,960.00
       8             5,070           141,960.00           217,604.40           128,879.40          141,960.00
       9             4,530           117,780.00           194,427.60           115,152.60          117,780.00
      10             5,070           121,680.00           217,604.40           128,879.40          128,879.40
      11             5,070           121,680.00           217,604.40           128,879.40          128,879.40
      12             4,770           114,480.00           204,728.40           121,253.40          121,253.40
- -----------------------------------------------------------------------------------------------------------------
     Total          58,630      $  1,642,450.00      $  2,516,399.60     $   1,490,374.60     $  1,693,278.40


(Total of Column E) (more than) (Total of Column D) therefore Annual True-up
- ----------------------------------------------------------------------------
calculated under Section 7.5.1(b)
- ---------------------------------


                                                                                        
H.    Annual True-up - Delivered Energy                                  (Total D - Total G)  $        (50,828.40)

I.    Average Cost of Delivered Energy after True-up ($/MWh)             (Total D / Total C)               $28.01




                       J                 K                    L                   M                    N

                  Replacement    Replacement Energy   Gross Replacement  Adjusted Replacement  Invoiced Replacement
     Month       Energy (MWh)      x Average Cost      Cost of Energy       Cost of Energy        Cost of Energy
     -----       ------------      --------------      --------------       --------------        --------------
                                      (I x J)

                                                                                       
       1              150                            $  4,900.00                                $              0.00
       2              150                               7,680.00                                           1,242.00
       3              150                               4,040.00                                             227.00
       4               0                                    0.00                                               0.00
       5               0                                    0.00                                               0.00
       6               0                                    0.00                                               0.00
       7               0                                    0.00                                               0.00
       8               0                                    0.00                                               0.00
       9               0                                    0.00                                               0.00
      10               0                                    0.00                                               0.00
      11               0                                    0.00                                               0.00
      12               0                                    0.00                                               0.00
- -------------------------------------------------------------------------------------------------------------------
     Total            450       $     12,606.22      $ 16,620.00         $           4,013.78   $          1,469.00



                                                                                          
O.    Annual True-up - Replacement Costs                                 (Total N - Total M)    $         (2,544.78)

Total Annual True-up *                                                         (H + O)          $        (53,373.18)
===================================================================================================================

                                      E-3


                                   EXHIBIT E
                                 TRACY BUNDLE
                           YEAR END TRUE-UP INVOICE

EXAMPLE 4
- ---------



                       C                 D                    E                   F                    G
                   Delivered       Market Price x      Price Ceiling x      Price Floor x     Supplier's Invoiced
     Month       Energy (MWh)     Delivered Energy    Delivered Energy     Delivered Energy     Amount - Energy
     -----       ------------     ----------------    ----------------     ----------------     ---------------
                                                           (A x C)             (B x C)
                                                                            
       1             4,680      $    142,035.00      $    200,865.60     $    118,965.60      $    142,035.00
       2             4,680           205,365.00           200,865.60          118,965.60           200,865.60
       3             4,680            84,810.00           200,865.60          118,965.60           118,965.60
       4             5,070            91,260.00           217,604.40          128,879.40           128,879.40
       5             5,070            86,190.00           217,604.40          128,879.40           128,879.40
       6             4,870            77,920.00           209,020.40          123,795.40           123,795.40
       7             5,070            76,050.00           217,604.40          128,879.40           128,879.40
       8             5,070            70,980.00           217,604.40          128,879.40           128,879.40
       9             4,530            58,890.00           194,427.60          115,152.60           115,152.60
      10             5,070            60,840.00           217,604.40          128,879.40           128,879.40
      11             5,070            60,840.00           217,604.40          128,879.40           128,879.40
      12             4,770            57,240.00           204,728.40          121,253.40           121,253.40
- -----------------------------------------------------------------------------------------------------------------
     Total          58,630      $  1,072,420.00      $  2,516,399.60     $  1,490,374.60      $  1,595,344.00



(Total of Column E) (more than) (Total of Column D) therefore Annual True-up
calculated under Section 7.5.1(b)


                                                                                           
H.    Annual True-up - Delivered Energy                                  (Total F - Total G)  $      (104,969.40)

I.     Average Cost of Delivered Energy after True-up ($/MWh)            (Total F / Total C)              $25.42




                       J                 K                    L                   M                    N
                                                                                                   Invoiced
                  Replacement    Replacement Energy   Gross Replacement  Adjusted Replacement     Replacement
     Month       Energy (MWh)      x Average Cost      Cost of Energy       Cost of Energy      Cost of Energy
     -----       ------------      --------------      --------------       --------------      --------------
                                      (I x J)
                                                                                     
       1              150                            $  4,900.00                           $              0.00
       2              150                               7,680.00                                      1,242.00
       3              150                               4,040.00                                        227.00
       4               0                                    0.00                                          0.00
       5               0                                    0.00                                          0.00
       6               0                                    0.00                                          0.00
       7               0                                    0.00                                          0.00
       8               0                                    0.00                                          0.00
       9               0                                    0.00                                          0.00
      10               0                                    0.00                                          0.00
      11               0                                    0.00                                          0.00
      12               0                                    0.00                                          0.00
- --------------------------------------------------------------------------------------------------------------
     Total            450       $     11,439.00      $ 16,620.00         $       5,181.00  $          1,469.00



                                                                                           
O.    Annual True-up - Replacement Costs                                 (Total N - Total M)  $      (3,712.00)

Total Annual True-up *                                                         (H + O)        $    (108,681.40)
================================================================================================================


                                      E-4


*  Positive  Total  Annual  True-up  is  indicative  of a payment  from Buyer to
Supplier; Negative Total Annual True-up is indicative of a payment from Supplier
to Buyer.

                                      E-5


                                   EXHIBIT F
                   NOTICES, BILLING AND PAYMENT INSTRUCTIONS

Supplier:
- --------
a) Agreement Notices:
   ------------------
         Address:          B. Frank Moon
                           WPS Northern Nevada, LLC
                           c/o WPS Power Development, Inc.
                           1088 Springhurst Drive
                           Green Bay, WI 54304
         Phone:            920//617-6017
         Fax:              920/617-5999

b) Payment Check:
   --------------
         Name:             WPS Northern Nevada, LLC
         Address:          c/o WPS Power Development, Inc.
                           1088 Springhurst Drive
                           Green Bay, WI 54304

c) Payment Wire Transfer:
   ----------------------
         Bank:             Firstar Bank, Milwaukee, N.A.
         ABA#:             075000022
         For:              WPS Northern Nevada, LLC, c/o WPS Power Development,
                           Inc.
         Account No.:      121740515

d) Invoices:
   --------
         Name:             WPS Northern Nevada, LLC
         Address:          c/o WPS Power Development, Inc.
                           1088 Springhurst Drive
                           Green Bay, WI  54304
         Phone:            920/617-6040
         Fax:              920/617-6140

e) Operating Notifications:
   -----------------------
         i) Pre-Schedule            Thomas G. Balzola     Phone:  920/617-6059
                                                          Fax:    920/617-5999
         ii) Real Time              Thomas G. Balzola     Phone:  920/617-6059
                                                          Fax:    920/617-5999
         iii) Monthly Checkout      Thomas G. Balzola     Phone:  920/617-6059
                                                          Fax:    920/617-5999

                                      F-6


Buyer:
- -----
a) Agreement Notices:
   -----------------
         Address:          Gary Craythorn
                           Manager, Resource Contracts
                           Nevada Power Company
                           6226 West Sahara Avenue, M/S 26A
                           Las Vegas, Nevada 89146
         Phone:            702/367-5425
         Fax:              702/227-2455
         E-mail:           gcraythorn@nevp.com

b) Invoices:
   --------

         US Post Office: (Via Certified Mail)   Overnight Delivery
         ---------------                        ------------------
         Address:        Nevada Power Company   Address: Nevada Power Company
                         Attn: Kathy Crews               Attn: Kathy Crews
                         P.O. Box 230, M/S 20            6226 West Sahara Ave.,
                         Las Vegas, Nevada 89151         M/S 20
         Telephone:      702/227-2476                    Las Vegas, Nevada 89146
         Fax:            702/367-5096
         E-mail:         kcrews@nevp.com

c) Schedules:
   ---------
         i)  Pre-Schedule: Primary                 Phone:  702/862-7195
                           Name: Rick Engebretson  E-mail: rengebretson@nevp.com
                           Alternate               Phone:  702/862-7194
                           Name: Tim Schuster      E-mail: tschuster@nevp.com
                                                   Fax:    702/227-2404
         ii)  Real Time:                           Phone:  702/862-7106
                                                   Fax:    702/227-2404
         iii) Monthly Checkout: Kathy Crews        Phone:  702/227-2476
                                                   Fax:    702/367-5096
                                                   E-mail: kcrews@nevp.com

d) Control Area/Transmission:
   -------------------------
         i)  Reliability Dispatch:   Phone: (702) 451-2026
                                           Fax:      (702) 862-7113
         ii) Transmission Dispatch:  Phone: (702) 451-8346
                                           Fax:      (702) 862-7113

                                      F-7


                                   EXHIBIT G
                         FORM OF AVAILABILITY NOTICE*

Date of Notice:

Time of Notice:

Supplier:

Name of Supplier's
Representative:

Buyer:

Asset Bundle:

Availability Dates (96 hours
total):



                          A               B                C             D             E              F             G           H
                                                                                                                             Asset
                                                                                                                Permitted    Bundle
                      Available                        Permitted   Asset Bundle    Available    Total Derating  Derating    Capacity
Availability  Hour   from Unit 1    Total Derating    Derating of   Capacity of   from Unit 2     of Unit 2    of Unit 2   of Unit 2
   Date      Ending      (MW)       of Unit 1 (MW)    Unit 1 (MW)   Unit 1 (MW)       (MW)          (MW)          (MW)        (MW)
   ----      ------      ----       --------------    -----------   -----------       ----          ----          ----        ----

                                                                                                 
                      (A (less         (___ - A)       (C (less       (A - C)      (E (less        (___ - E)    (B (less    (G - E)
                      than) or                         than) or                    than) or                     than) or
                      =  ___)                          = B)                        = ___)                       =

              0600
              0700
              0800
              0900
              1000
              1100
              1200
              1300
              1400
              1500
              1600
              1700
              1800
              1900
              2000
              2100
              2200
              2300
              2400
              0100
              0200
              0300
              0400
              0500
              0600
              0700
               :
 (96 hours total)
               :
              300
              400
              500


        I**                   J
                    Cause and Expected
    Alternative   Duration of Deratings and
    Point(s) of       Identification of
      Delivery       Permitted Deratings
      --------       -------------------

        * The Parties' operational personnel will develop a similar form for the
other generating units in the bundle.


** The Parties' operational personnel shall develop the necessary procedure to
document requests and responses to utilize Alternative Point(s) of Delivery.


                                   EXHIBIT H
                               FORM OF GUARANTY

     This Guaranty is entered into as of October 25, 2000, by WPS Resources
Corporation, a Wisconsin corporation ("Guarantor"), on behalf of WPS Northern
Nevada, LLC, a Nevada limited liability company ("Supplier"), in favor of and
for the benefit of Sierra Pacific Power Company, a Nevada corporation ("SPPC").
SPPC is sometimes referred to herein as "Beneficiary".

     WHEREAS, Supplier and SPPC are entering into a Transitional Power Purchase
Agreement dated as of October 25, 2000 (the "TPPA") by which Supplier has agreed
to sell and SPPC has agreed to buy Energy and Ancillary Services (as defined in
the TPPA) produced by the Tracy/Pinon generating station being sold by SPPC; and

     WHEREAS, it is a condition to the obligation of SPPC to enter into the TPPA
for Guarantor to guaranty the Supplier's obligations under the TPPA on and after
the Effective Date (as defined in the TPPA), subject to the limitations herein
(the "Guarantied Obligations").

     1. Guaranty. Subject to the terms and conditions herein, Guarantor
irrevocably and unconditionally guaranties, as primary obligor and not merely as
surety, the due and punctual payment in full of all Guarantied Obligations
(including amounts that would become due but for the operation of the automatic
stay under Section 362(a) of the Bankruptcy Code, 11 U.S.C.(S)362(a)).

     Subject to the other provisions of this Section 1, upon failure of Supplier
to pay any of the Guarantied Obligations when and as the same shall become due,
Guarantor will upon demand pay, or cause to be paid, in cash, to SPPC, an amount
equal to the lesser of: (i) the aggregate of the unpaid Guarantied Obligations
and (ii) the Credit Amount (as defined in the TPPA) as of the date of such
failure of Supplier to pay such Guarantied Obligations. In the event Guarantor
fails to pay the Guarantied Obligations, each and every default in the payment
shall give rise to a separate cause of action and separate causes of action may
be brought hereunder as each such cause of action arises.

     In the event that all or any portion of the Guarantied Obligations is paid
by Supplier, the obligations of Guarantor hereunder shall continue and remain in
full force and effect or be reinstated, as the case may be, in the event that
all or any part of such payment(s) is rescinded or recovered directly or
indirectly from the Beneficiary as a preference, fraudulent transfer or
otherwise, and any such payments that are so rescinded or recovered shall
constitute Guarantied Obligations, subject to the terms and conditions herein.


     2. Expenses. The Guarantor agrees to reimburse SPPC for all reasonable
costs and expenses (including, without limitation, the reasonable fees and
expenses of legal counsel) in connection with (i) any default by Guarantor
hereunder and any enforcement or collection proceeding resulting therefrom,
including, without limitation, all manner of participation in or other
involvement with bankruptcy, insolvency, receivership, foreclosure, winding up
or liquidation proceedings of or involving the Guarantor, judicial or regulatory
proceedings of or involving the Guarantor and workout, restructuring or other
negotiations or proceedings of or involving the Guarantor (whether or not the
workout, restructuring or transaction contemplated

                                      H-3


thereby is consummated) and (ii) the enforcement of this Section 2.

     3. Guaranty Absolute; Continuing Guaranty. The obligations of Guarantor
hereunder are irrevocable, absolute, independent and unconditional and shall not
be affected by any circumstance which constitutes a legal or equitable discharge
of a guarantor or surety other than payment in full of the Guarantied
Obligations. In furtherance of the foregoing and without limiting the generality
thereof, Guarantor agrees that: (a) this Guaranty is a guaranty of payment when
due and not of collectibility; (b) the obligations of Guarantor hereunder are
independent of the obligations of Supplier under the TPPA and a separate action
or actions may be brought and prosecuted against Guarantor whether or not any
action is brought against the Supplier and whether or not the Supplier is joined
in any such action or actions; and (c) Guarantor's payment of a portion, but not
all, of the Guarantied Obligations shall in no way limit, affect, modify or
abridge Guarantor's liability for any portion of the Guarantied Obligations that
has not been paid. This Guaranty is a continuing guaranty and shall be binding
upon Guarantor and its successors and assigns.

     4. Actions by Beneficiary. The Beneficiary may from time to time, without
notice or demand and without affecting the validity or enforceability of this
Guaranty or giving rise to any limitation, impairment or discharge of
Guarantor's liability hereunder, (a) renew, extend, accelerate or otherwise
change the time, place, manner or terms of payment of the Guarantied
Obligations, (b) settle, compromise, release or discharge, or accept or refuse
any offer of performance with respect to, or substitutions for, the Guarantied
Obligations or any agreement relating thereto and/or subordinate the payment of
the same to the payment of any other obligations, (c) request and accept other
guaranties of the Guarantied Obligations and take and hold security for the
payment of this Guaranty or the Guarantied Obligations, (d) release, exchange,
compromise, subordinate or modify, with or without consideration, any security
for payment of the Guarantied Obligations, any other guaranties of the
Guarantied Obligations, or any other obligation of any Person with respect to
the Guarantied Obligations, (e) enforce and apply any security hereafter held by
or for the benefit of the Beneficiary in respect of this Guaranty or the
Guarantied Obligations and direct the order or manner of sale thereof, or
exercise any other right or remedy that the Beneficiary may have against any
such security, and (f) exercise any other rights available to SPPC under the
TPPA.

     5. No Discharge. This Guaranty and the obligations of Guarantor hereunder
shall be valid and enforceable and shall not be subject to any limitation,
impairment or discharge for any reason (other than payment in full of the
Guarantied Obligations), including without limitation the occurrence of any of
the following, whether or not Guarantor shall have had notice or knowledge of
any of them: (a) any failure to assert or enforce or agreement not to assert or
enforce, or the stay or enjoining, by order of court, by operation of law or
otherwise, of the exercise or enforcement of, any claim or demand or any right,
power or remedy with respect to the Guarantied Obligations or any agreement
relating thereto, or with respect to any other guaranty of or security for the
payment of the Guarantied Obligations, (b) any waiver or modification of, or any
consent to departure from, any of the terms or provisions of any other guaranty
or security for the Guarantied Obligations, (c) the Guarantied Obligations, or
any agreement relating thereto, at any time being found to be illegal, invalid
or unenforceable in any respect, (d) the application of payments received from
any source to the payment of indebtedness other than the Guarantied Obligations,
even if the Beneficiary might have elected to apply such payment to any part or
all of the Guarantied Obligations, (e) any failure to perfect or continue
perfection of a security interest in any collateral which secures any of the
Guarantied Obligations, (f) any defenses, set-offs or

                                      H-4


counterclaims which the Supplier may assert against the Beneficiary in respect
of the Guarantied Obligations, including but not limited to failure of
consideration, breach of warranty, payment, statute of frauds, statute of
limitations, accord and satisfaction, and (g) any other act or thing or
omission, or delay to do any other act or thing, which may or might in any
manner or to any extent vary the risk of Guarantor as an obligor in respect of
the Guarantied Obligations.

     6. Waivers for the Benefit of Beneficiary. Guarantor waives, for the
benefit of Beneficiary: (a) any right to require the Beneficiary, as a condition
of payment or performance by Guarantor, to (i) proceed against the Supplier, any
other guarantor of the Guarantied Obligations or any other Person, (ii) proceed
against or exhaust any security held from the Supplier, any other guarantor of
the Guarantied Obligations or any other Person, or (iii) pursue any other remedy
in the power of the Beneficiary; (b) any defense arising by reason of the
incapacity, lack of authority or any disability or other defense of the Supplier
including, without limitation, any defense based on or arising out of the lack
of validity or the unenforceability of the Guarantied Obligations or any
agreement or instrument relating thereto or by reason of the cessation of the
liability of the Supplier from any cause other than payment in full of the
Guarantied Obligations; (c) any defense based upon any statute or rule of law
which provides that the obligation of a surety must be neither larger in amount
nor in other respects more burdensome than that of the principal; (d) (i) any
principles or provisions of law, statutory or otherwise, that are or might be in
conflict with the terms of this Guaranty and any legal or equitable discharge of
Guarantor's obligations hereunder, (ii) the benefit of any statute of
limitations affecting Guarantor's liability hereunder or the enforcement hereof,
(iii) any rights to set-offs, recoupments and counterclaims, and (iv)
promptness, diligence and any requirement that the Beneficiary protect, secure,
perfect or insure any lien on any property subject thereto; (e) notices,
demands, presentments, protests, notices of protest, notices of dishonor and
notices of any action or inaction, including acceptance of this Guaranty; and
(f) to the fullest extent permitted by law, any defenses or benefits that may be
derived from or afforded by law which limit the liability of or exonerate
guarantors or sureties, or which may conflict with the terms of this Guaranty.

     7. Waiver of Rights Against Supplier. Guarantor waives any claim, right or
remedy, direct or indirect, that Guarantor now has or may hereafter have against
the Supplier or any of its assets in connection with this Guaranty or the
performance by Guarantor of its obligations hereunder, in each case whether such
claim, right or remedy arises in equity, under contract, by statute, under
common law or otherwise and including without limitation (a) any right of
subrogation, reimbursement or indemnification that Guarantor now has or may
hereafter have against the Supplier, (b) any right to enforce, or to participate
in, any claim, right or remedy that the Beneficiary now has or may hereafter
have against the Supplier, and (c) any benefit of, and any right to participate
in, any collateral or security hereafter held by the Beneficiary. Guarantor
further agrees that, to the extent the waiver or agreement to withhold the
exercise of its rights of subrogation, reimbursement and indemnification as set
forth herein is found by a court of competent jurisdiction to be void or
voidable for any reason, any rights of subrogation, reimbursement or
indemnification Guarantor may have against the Supplier or against any
collateral or security shall be junior and subordinate to any rights the
Beneficiary may have against Supplier, to all right, title and interest the
Beneficiary may have in any such collateral or security, and to any right the
Beneficiary may have against such other guarantor.

     8. Representations and Warranties of Guarantor. Guarantor represents and
warrants to SPPC as follows:
                                      H-5


     (a) Guarantor is a corporation duly organized, validly existing and in good
standing under the laws of its state of incorporation. Guarantor has the
requisite corporate power and authority to own, lease and operate its properties
and to carry on its business as now being conducted.

     (b) Guarantor has the corporate power and authority to execute and deliver
this Guaranty and to consummate the transactions contemplated hereby. The
execution and delivery of this Guaranty and the consummation of the transactions
contemplated hereby have been duly and validly authorized by the Board of
Directors of Guarantor, and no other corporate proceedings on the part of
Guarantor, including the approval of its shareholders, are necessary to
authorize this Guaranty or to consummate the transactions so contemplated. This
Guaranty has been duly and validly executed and delivered by Guarantor and
constitutes a valid and binding agreement of Guarantor, enforceable against
Guarantor in accordance with its terms.

     (c) There are no legal or arbitral proceedings by or before any
governmental or regulatory authority or agency, now pending or (to Guarantor's
knowledge) threatened against Guarantor or its subsidiaries that could
reasonably be expected to have a material adverse effect on the consolidated
financial condition, operations or business taken as a whole of it and its
subsidiaries.

     (d) The representations and warranties made herein will remain true until
Guarantor has fulfilled all obligations to pay in full the Guarantied
Obligations.

     9. Set Off. In addition to any other rights the Beneficiary may have under
law or in equity, if any amount shall at any time be due and owing by Guarantor
to the Beneficiary under this Guaranty, the Beneficiary is authorized at any
time or from time to time, without notice (any such notice being expressly
waived), to set off and to appropriate and to apply any indebtedness of the
Beneficiary owing to Guarantor and any other property of Guarantor held by the
Beneficiary to or for the credit or the account of Guarantor against and on
account of the Guarantied Obligations and liabilities of Guarantor to the
Beneficiary under this Guaranty.

     10. Disputes. Any action, claim or dispute arising out of or relating to
this Guaranty (any such action, claim or dispute, a "Dispute") shall be
submitted in writing to the other Party. In the event Guarantor and SPPC are
unable to resolve the Dispute satisfactorily within thirty (30) days from the
receipt of notice of the Dispute, either Guarantor or SPPC may initiate
arbitration through the serving and filing of a demand for arbitration.
Guarantor and SPPC expressly agree that such arbitration shall be the exclusive
means to further resolve any Dispute and hereby irrevocably waive their right to
a jury trial with respect to any Dispute, provided that at any time a request
made for provisional remedies requesting preservation of respective rights and
obligations under the Guaranty may be resolved by a court of law located in the
County of the principal place of business of SPPC. Arbitration shall be
conducted in accordance with Sections 13.4, 13.5, 13.6, 13.7, and 13.8 of the
TPPA.

     11. Amendments and Waivers. No amendment, modification, termination or
waiver of any provision of this Guaranty, and no consent to any departure by
Guarantor therefrom, shall in any event be effective without the written
concurrence of SPPC and, in the case of any such amendment or modification,
Guarantor. Any such waiver or consent shall be effective only in the specific
instance and for the specific purpose for which it was given.

                                      H-6


     12. Miscellaneous. It is not necessary for Beneficiary to inquire into the
capacity or powers of Guarantor or Supplier or the officers, directors or any
agents acting or purporting to act on behalf of any of them.

     The rights, powers and remedies given to Beneficiary by this Guaranty are
cumulative and shall be in addition to and independent of all rights, powers and
remedies given to Beneficiary by virtue of any statute or rule of law or in the
TPPA. Any forbearance or failure to exercise, and any delay by Beneficiary in
exercising, any right, power or remedy hereunder shall not impair any such
right, power or remedy or be construed to be a waiver thereof, nor shall it
preclude the further exercise of any such right, power or remedy.

     In case any provision in or obligation under this Guaranty shall be
invalid, illegal or unenforceable in any jurisdiction, the validity, legality
and enforceability of the remaining provisions or obligations, or of such
provision or obligation in any other jurisdiction, shall not in any way be
affected or impaired thereby.

     This Guaranty shall inure to the benefit of Beneficiary and its respective
successors and assigns.

     13. Notices. All notices, requests, demands, waivers, consents and other
communications hereunder shall be in writing, shall be delivered either in
person, by telegraphic, facsimile or other electronic means, by overnight air
courier or by mail, and shall be deemed to have been duly given and to have
become effective (a) upon receipt if delivered in person or by telegraphic,
facsimile or other electronic means, (b) one (1) business day after having been
delivered to an air courier for overnight delivery or (c) three (3) business
days after having been deposited in the U.S. mails as certified or registered
mail, return receipt requested, all fees prepaid, directed to the parties at the
following addresses:

     If to Guarantor, addressed to:           Ralph G. Baeten
                                              WPS Resources Corporation
                                              700 North Adams Street
                                              Green Bay, WI  54307
                                              Facsimile: (920) 433-7653

     If to SPPC, addressed to:                William E. Peterson
                                              Sierra Pacific Power Company
                                              6100 Neil Road
                                              Reno, Nevada 89511
                                              Facsimile:  (775) 834-5959

     IN WITNESS WHEREOF, Guarantor has caused this Guaranty to be duly executed
and delivered by its officers thereunto duly authorized as of the date first
written above.

                               By:
                                              ---------------------------
                                              Ralph G. Baeten
                               Title:         Treasurer
                               Address:       WPS Resources Corporation
                                              700 North Adams Street
                                              Green Bay, WI  54307

                                      H-7


                                    EXHIBIT I
                            COMPANY OBSERVED HOLIDAYS


                  New Year's Day                 January 1st
                  President's Day                Third Monday in February
                  Memorial Day (observed)        Last Monday in May
                  Independence Day               July 4th
                  Labor Day                      First Monday in September
                  Nevada Day                     Last Friday in October
                  Thanksgiving Day               Fourth Thursday in November
                  Thanksgiving Friday            Friday after Thanksgiving
                  Christmas Day                  December 25th



Holidays falling on Saturday will be observed on the preceding Friday and those
falling on Sunday will be observed on the following Monday.

                                      I-1


                                    EXHIBIT J
                                  TRACY BUNDLE
                  ADJUSTMENTS TO TPPA AMOUNT AND CREDIT AMOUNT



                               Monthly                                          Monthly
               Month         Adjustment                          Month         Adjustment
           --------------------------------                  -------------------------------
                                                                      
           Mar-01                      4.6%                          Mar-02             3.7%
           Apr-01                      3.0%                          Apr-02             2.5%
           May-01                      3.3%                          May-02             2.6%
           Jun-01                      5.6%                          Jun-02             4.3%
           Jul-01                      5.7%                          Jul-02             4.5%
           Aug-01                      5.6%                          Aug-02             4.4%
           Sep-01                      4.3%                          Sep-02             3.4%
           Oct-01                      5.3%                          Oct-02             4.2%
           Nov-01                      5.3%                          Nov-02             4.2%
           Dec-01                      6.5%                          Dec-02             5.2%
           Jan-02                      7.0%                          Jan-03             5.5%
           Feb-02                      5.7%                          Feb-03             4.5%


                          ADJUSTMENTS TO TPPA AMOUNT

           Example 1 - Effective Date of Agreement is April 15, 2001
           --------------------------------------------------------------------

           A.    TPPA Amount:               $     15,000,000

                                       B                C               D
                                   Monthly          Applicable      Applicable
                    Month         Adjustment        Portion *       Adjustment
           --------------------------------------------------------------------
                                                                     (B x C)

           Apr-01                      3.0%            50.0%           1.5%
           May-01                      3.3%           100.0%           3.3%
           --------------------------------------------------------------------
                    Total                                              4.8%




                                                                                     
           E.    Total of Monthly Applicable Adjustments                                4.8%


           F.    Adjusted TPPA Amount                         (A x (1+D))   $     15,720,000
           =================================================================================

           Example 2 - Effective Date of Agreement is September 15, 2001
           ---------------------------------------------------------------------------------

           G.    TPPA Amount:               $     15,000,000

                                       H                I               J

                                   Monthly         Applicable       Applicable
                    Month         Adjustment        Portion *       Adjustment
           ---------------------------------------------------------------------
                                                                     (H x I)
           Jun-01                      5.6%           100.0%           5.6%
           Jul-01                      5.7%           100.0%           5.7%
           Aug-01                      5.6%           100.0%           5.6%



                                      J-1


                                    EXHIBIT J
                                  TRACY BUNDLE
                  ADJUSTMENTS TO TPPA AMOUNT AND CREDIT AMOUNT

Sep-01                      4.3%            50.0%           2.2%
- ----------------------------------------------------------------
    Total                                                  19.1%

K.  Total of Monthly Applicable Adjustments                                19.1%

L   Adjusted TPPA Amount                           (G x (1-K))   $    12,135,000
================================================================================

Example 3 - Termination Date of October 31, 2002
- --------------------------------------------------------------------------------

M.  TPPA Amount:                 $     15,000,000


                       N                O               P
                   Monthly        Applicable        Applicable
    Month         Adjustment        Portion **      Adjustment
- ----------------------------------------------------------------
                                                     (N x O)
Nov-02                      4.2%           100.0%           4.2%
Dec-02                      5.2%           100.0%           5.2%
Jan-03***                   5.5%           100.0%           5.5%
Feb-03***                   4.5%           100.0%           4.5%
- ----------------------------------------------------------------
    Total                                                  19.4%

Q.  Total of Monthly Applicable Adjustments                                19.4%

R   Payment Amount                                   (M x Q)     $     2,910,000
================================================================================

* The applicable portion of the month is the number of days in the month during
which deliveries of energy from Supplier to Buyer were made divided by the
number of days in the month.

** The applicable portion of the month is the number of days in the month during
which deliveries of energy from Supplier to Buyer would have been made divided
by the number of days in the month.

*** In the event the Agreement is terminated on or before December 31, 2002, the
refund of the TPPA Amount shall be calculated as if Buyer had not exercised its
rights pursuant to Section 2.1.2. That is, the monthly adjustments of the TPPA
Amount for the months of January 2003 and February 2003 shall be payable to
Buyer in the event of termination prior to December 31, 2002.


                       ADJUSTMENTS TO CREDIT AMOUNT ***


A.  Credit Amount*:              $    200,000,000

                       B                C               D
               Beginning                            Adjusted
    Month        Credit Amount      Adjustment    Credit Amount
- ---------------------------------------------------------------
                                      ( ** )         (B - C)


Mar-01         $     200,000,000                0 $  200,000,000


                                      J-2


                                   EXHIBIT J
                                 TRACY BUNDLE
                 ADJUSTMENTS TO TPPA AMOUNT AND CREDIT AMOUNT


 Apr-01         $     200,000,000                0    $  200,000,000
 May-01         $     200,000,000                0    $  200,000,000
 Jun-01         $     200,000,000                0    $  200,000,000
 Jul-01         $     200,000,000       11,200,000    $  188,800,000
 Aug-01         $     188,800,000       11,400,000    $  177,400,000
 Sep-01         $     177,400,000       11,200,000    $  166,200,000
 Oct-01         $     166,200,000        8,600,000    $  157,600,000
 Nov-01         $     157,600,000       10,600,000    $  147,000,000
 Dec-01         $     147,000,000       10,600,000    $  136,400,000
 Jan-02         $     136,400,000       13,000,000    $  123,400,000
 Feb-02         $     123,400,000       14,000,000    $  109,400,000
 Mar-02         $     109,400,000       11,400,000    $   98,000,000
 Apr-02         $      98,000,000        7,400,000    $   90,600,000
 May-02         $      90,600,000        5,000,000    $   85,600,000
 Jun-02         $      85,600,000        5,200,000    $   80,400,000
 Jul-02         $      80,400,000        8,600,000    $   71,800,000
 Aug-02         $      71,800,000        9,000,000    $   62,800,000
 Sep-02         $      62,800,000        8,800,000    $   54,000,000
 Oct-02         $      54,000,000        6,800,000    $   47,200,000
 Nov-02         $      47,200,000        8,400,000    $   38,800,000
 Dec-02         $      38,800,000        8,400,000    $   30,400,000
 Jan-03****     $      30,400,000       10,400,000    $   20,000,000
 Feb-03****     $      20,000,000       11,000,000    $    9,000,000


* As defined in Section 1.2.18 of the Agreement.
** Monthly Adjustment for prior month times Credit Amount.
*** The adjusted Credit Amounts, as shown above, are the amounts applicable to
the first day of each month. A prorata share of the monthly adjustments will be
subtracted from the previous daily adjusted Credit Amount to establish the daily
adjusted Credit Amount for the current day. For example: the adjusted Credit
Amount for June 2, 2001 will be $200,000,000 less one thirtieth of the monthly
adjustment for July 2001 ($11,200,000 / 30) or $199,626,666.67. Thus, the Credit
Amount at February 28, 2003, will equal zero.
**** Provided the Buyer exercises its rights pursuant to Section 2.1.2.



                                      J-3


                                    EXHIBIT K
                                  TRACY BUNDLE
                       ADJUSTMENTS TO MINIMUM ANNUAL TAKE




         A                     B                  C                D                  E                  F
                          Base Number        Base Energy       Sales per        Current Number    Adjusted Energy
      Class *            of Customers        Sales (MWh)     Customer (MWh)      of Customers       Sales (MWh)
- ---------------------------------------------------------------------------------------------------------------------
                                                                                  
                                                                (C / B)                              (D x E) **
Residential                        475,000       5,800,000                 12            470,000          5,738,947
Commercial                          65,000       2,800,000                 43             60,000          2,584,615
Industrial                           1,000       4,900,000                                   800          3,600,000
Street Lighting                          5         130,000                                     5            130,000
Other Retail                            50         600,000                                    50            600,000
Wholesale                                5         850,000                                     5            850,000
- ---------------------------------------------------------------------------------------------------------------------
                                   541,060      15,080,000                               530,860         13,503,563

G.  Adjustment to Minimum Annual Take                                              (F / C)                   89.55%
H.  Minimum Annual Take from Exhibit A (MWh)                                                              2,200,000
I.   Revised Minimum Annual Take (MWh)                                             (G x H)                1,970,100



         J                       K
    Month During          Applicable Min.
   Contract Year         Annual Take (MWh)
- -------------------------------------------
         1                       2,200,000
         2                       2,200,000
         3                       2,200,000
         4                       2,200,000
         5                       1,970,100
         6                       1,970,100
         7                       1,970,100
         8                       1,870,000
         9                       1,870,000
         10                      1,760,000
         11                      1,760,000
         12                      1,760,000
- -------------------------------------------
       Total                    23,730,300


L. Minimum Take for Contract Year (MWh)            (Total of K / 12)   1,977,525

*  As reported on Buyer's FERC Form 1

** Adjusted Energy Sales for the remaining  Industrial,  Street Lighting,  Other
Retail, and Wholesale  customers will be based upon actual sales during the base
period.

                                      K-1


                                    EXHIBIT L
                                  TRACY BUNDLE
                    ENERGY APPLICABLE TO MINIMUM ANNUAL TAKE





       A             B                C               D               E *               F                G **
   Dispatch        Supply         Delivered       Permitted          Force         Replacement        Applicable
     Hour       Amount (MWh)    Energy (MWh)    Derating(MWh)     Majeure(MWh)     Energy(MWh)       Energy (MWh)
- ---------------------------------------------------------------------------------------------------------------------
                                                                                   
                                                                                                      (C+D+E+F)
            1              507             507                                                                   507
            2              507             507                                                                     0
            3              507             507                                                                   507
            4              507             507                                                                   507
            5              507             507                                                                   507
            6              507             487               20                                                  507
            7              507             487               20                                                  507
            8              507             487                                                 20                507
            9              507             507                                                                   507
           10              507             507                                                                   507
           11              507             507                                                                   507
           12              507             507                                                                   507
           13              507               0                               507                                 507
           14              507               0                               507                                 507
           15              507               0                               507                                 507
           16              507               0                               507                                 507
           17              507             457                                                 30                487
           18              507             507                                                                   507
           19              507             507                                                                   507
           20              507             507                                                                   507
           21              507             507                                                                   507
           22              507             507                                                                   507
           23              507             507                                                                   507
           24              477             477                                                                   477
           25              457             457                                                                   457
           26              427             427                                                                   427
           27              457             427               30                                                  457
           28              477             477                                                                   477
           29              507             507                                                                   507
           30              507             507                                                                   507
           31              507             507                                                                   507
           32              507             507                                                                   507
           33              507             507                                                                   507
           34              507             507                                                                   507
           35              507             507                                                                   507
           36              507             507                                                                   507
- ---------------------------------------------------------------------------------------------------------------------
        total           18,012          15,844               70            2,028               50             17,992


                                      L-1


                                   EXHIBIT L
                                  TRACY BUNDLE
                    ENERGY APPLICABLE TO MINIMUM ANNUAL TAKE

 * Includes  energy  excused  because of Supplier's and Buyer's events of Force
   Majeure
** G cannot be greater than B

                                    EXHIBIT M
               ASSET BUNDLE CONTRACTUAL AND OPERATING CONSTRAINTS

1.      For the purposes of this Exhibit M, "Constrained Capacity" shall mean
        that portion of the Asset Bundle Capacity that has been designated as
        being subject to contractual and operational constraints in accordance
        with the provisions of this Exhibit M.

2.      Section 4.1.4 of the Agreement, which addresses Supplier's right to
        Asset Bundle Capacity in excess of the Supply Amount, shall not be
        applicable to Constrained Capacity.

3.      Asset Bundle Capacity scheduled in accordance with Section 5.1 of the
        Agreement, which addresses Buyer's notifications to Supplier, shall not
        be deemed to include Constrained Capacity unless Buyer's schedules
        specifically designate Constrained Capacity as being applicable to the
        schedules.

4.      The Asset Bundle Capacity described in the following table shall be
        deemed Constrained Capacity.



- ---------------------------------------------------------------------------------------------------------
Asset Bundle            Source of Capacity           Annual Limit        Monthly Limit       Daily Limit
- ---------------------------------------------------------------------------------------------------------
                                                                                 
                                                   72 hours at max.
                          Clark Mt. 3-4              capacity for
   Tracy              (7 MW per unit summer)          each unit*             None                None
- ---------------------------------------------------------------------------------------------------------
   Tracy                  Valley Rd 1-3              200 hours at
                          (6 MW summer)              max. capacity
                                                    for each unit*           None                None
- ---------------------------------------------------------------------------------------------------------
   Tracy          Clark Mt. 1-2, Brunswick 1-3,      100 hours at
                          and Gabbs 1-2              max. capacity
                          (30 MW summer)            for each unit*           None                None
- ---------------------------------------------------------------------------------------------------------



* Buyer is attempting to raise the operating limits on these generating units.
If Buyer is successful, the higher limits will be applicable to this Exhibit M.