Document:

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                                                                   Exhibit 10(B)
                         SEVERANCE AND RELEASE AGREEMENT

PARTIES

      The parties to this Severance and Release Agreement ("Agreement") are
Sierra Pacific Resources and its affiliates, Nevada Power Company and Sierra
Pacific Power Company (collectively referred to as "Company"), and William E.
Peterson ("Employee").

RECITALS

      a.    Employee currently holds the positions of Senior Vice-President,
            General Counsel and Corporate Secretary with Company. This Agreement
            is not based upon any change in control or in the ownership of a
            substantial portion of the Company's assets.

      b.    Employee has had access to Confidential Information, as
            hereinafter defined.  Employee has occupied a position of trust
            and confidence with respect to such Confidential Information.

      c.    Employee and Company desire to terminate the employment relationship
            presently existing between them and to enter into an independent
            contractor attorney client relationship on terms and conditions as
            hereinafter set forth.

      d.    This Agreement provides Employee and Company with rights and
            benefits that exceed the rights and benefits contained in the
            existing Employment Agreement (as defined below) and is adequate
            consideration for this Agreement.

TERMS OF AGREEMENT

1.    DEFINED TERMS

      1.1   "Competing Organization" means persons or organizations, including
            Employee, engaged in, or who may become engaged in, research or
            development, production, distribution, marketing, providing or
            selling of a Competing Product or Service.

      1.2   "Competing Products or Services" means products, processes, or
            services of any person or organization, other than Company, in
            existence or under development, which are substantially the same as
            or which compete with the products, processes, or services being
            developed, manufactured, or sold by Company during the time of
            Employee's employment with Company, including, but not limited to,
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            products, processes and services related to the generation,
            transmission, or distribution of electric energy and/or the buying,
            selling, scheduling of electric energy or capacity, or any risk
            management activities associated therewith.

      1.3   "Restricted Area" means the State of Nevada and the service
            territories of the Company.

      1.4   "Confidential Information" means any plan, specification, pattern,
            procedure, profile, design, device, list, compilation, data, or
            information relating to the present or planned business of Company
            which has not been released publicly by authorized representatives
            of Company, or which is not common to industry practice, including,
            but not limited to trade secrets as defined in NRS 600A.010, et seq.
            Confidential Information may include inventions; marketing and sales
            plans or programs; customer and supplier information; financial
            data; purchasing, pricing, or supply information; product
            engineering information; technological know-how; designs, plans or
            specifications regarding products and materials; manufacturing
            processes and techniques; regulatory approval strategies; computer
            programs, data, formulae and compositions; service techniques and
            protocols; and new product strategies, plans and designs.
            Confidential Information also includes information that if
            disclosed, could negatively affect the Company's reputation and it's
            relationship with business, governmental agencies and customers.
            Confidential Information includes all information received by
            Company under an obligation of confidentiality to a third party.

      1.5   "Employment Agreement" means all previous agreements, express or
            implied, between Company and Employee, including change in control
            or letter agreements.

      1.6   "STIP" means short-term cash incentive payment.

      1.7   "SERP" means Supplemental Executive Retirement Plan.

2.    TERMINATION OF PRESENT EMPLOYMENT

      2.1   Employee agrees to forego retirement at the present time and remain
            with Company and discharge each and every of his present duties and
            responsibilities until such time as Company finds a replacement
            satisfactory to Company or February 1, 2003, whichever date occurs
            sooner ("Termination Date").

      2.2   Until the Termination Date, Employee shall receive the compensation
            and benefits to which he is presently entitled or may become
            entitled

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            without change or alteration. Any accrued and unused Paid Time Off
            will be included in Employee's final paycheck.

3.    SERVICES AS INDEPENDENT CONTRACTOR

      3.1   After the Termination Date, Company will retain Employee as outside
            counsel. Employee shall be entitled to compensation as follows:

            3.1.1 Employee shall perform legal and other services for Company as
                  directed by managerial level employees of Company for the
                  first twelve months following the Termination Date ("First
                  Twelve Month Period") in an amount not less than 1000 hours at
                  an hourly rate of $300.00 per hour (exclusive of actual
                  costs). This provision shall be subject to satisfactory and
                  timely performance by Employee within accepted standards of
                  professional practice.

            3.1.2 Employee shall perform legal and or other services for Company
                  as directed by managerial level employees of Company for the
                  twelve-month period following the First Twelve-Month Period
                  ("Second Twelve-Month Period") in an amount not less than 1000
                  hours at an hourly rate of $325.00 per hour (exclusive of
                  actual costs). This provision shall be subject to satisfactory
                  and timely performance by Employee within accepted standards
                  of professional practice.

            3.1.3 Employee shall perform legal and or other services for Company
                  as directed by managerial level employees of Company for the
                  twelve-month period following the Second Twelve-Month Period
                  ("Third Twelve-Month Period") in an amount not less than 1000
                  hours at an hourly rate of $350.00 per hour (exclusive of
                  actual costs). This provision shall be subject to satisfactory
                  and timely performance by Employee within accepted standards
                  of professional practice.

            3.1.4 Billings shall occur monthly and payment shall be made 30 days
                  after billing.

            3.1.5 Hours above 1000 hours for the First Twelve Month Period shall
                  not be credited against the 1000 minimum hours for the Second
                  or Third Twelve-Month Periods and hours above the minimum for
                  the Second Twelve-Month Period shall not be credited against
                  the 1,000 minimum hours for the Third Twelve-Month Period.
                  Should the minimum hours not be billed after the First
                  Twelve-Month Period or the Second Twelve-Month Period or the
                  Third Twelve-Month Period, then Employee shall remit a bill
                  for the full amount of any deficiency in the first month
                  following

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                  the end of the First and Second or Third Twelve-Month Periods,
                  respectively.

4.    BENEFITS TO EMPLOYEE

      Commencing on the Termination Date, Employee shall be entitled to the
following benefits:

      4.1   Employee shall be entitled to whatever qualified pension benefits
            Employee may be entitled under the terms and conditions of the
            existing qualified retirement plan without change, modification or
            enhancement.

      4.2   Employee shall be entitled to withdraw in a lump sum and be paid
            within 30 days of the Termination Date all nonqualified retirement
            benefits to which he may be entitled calculated in accordance with
            the existing terms and conditions of said unqualified plans but
            altered, changed and or modified so as to treat Employee for
            purposes of said calculations as though Employee were 62 years of
            age on the day prior to the Termination Date and as though Employee
            had completed 10 years of actual service with respect to all such
            plans and also with respect to his existing Employment Contract
            which provides Employee with one and one half year of service credit
            for each year of actual service performed for the first ten years of
            service.

      4.3   Employee shall be entitled to whatever health and welfare benefits,
            including, but not limited to, medical, prescriptive drugs, dental,
            vision and EAP benefits, are available to retirees at Employee's age
            and their dependents, and on the same terms and conditions except
            that such benefits shall be calculated and made available without
            any actuarial deduction or other penalty resulting from having
            retired before age 65 or age 62, and, in addition, had completed ten
            years of actual service with respect to all of such plans as well as
            with respect to the extra credit earned under his existing
            Employment Contract which gives Employee one and one-half year of
            service for each year of service performed for the first ten years
            of employment.

      4.4   If ever in the future any of the Company's existing, retired, or
            separated officers are paid a STIP for the year 2000 ("2000 STIP")
            then the Employee shall be paid the 2000 STIP at the same time and
            in the form and manner paid to the other officer recipient(s). The
            2000 STIP shall be subject to withholding, deductions, assessments,
            and taxes, if applicable. If ever any of the Company's existing,
            retired or separated officers are paid a STIP for the year 2001
            ("2001 STIP"), then the Employee shall be paid the 2001 STIP at the
            same time and in the

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            form and manner paid to the other officer recipients(s). The 2001
            STIP shall be subject to withholding, deductions, assessments, and
            taxes, if applicable. If ever any of the Company's existing, retired
            or separated officers are paid a STIP for the year 2002 ("2002
            STIP"), then the Employee shall be paid a prorated portion of the
            2002 STIP at the same time and in the form and manner paid to the
            other officer recipient(s). Employee's prorated portion of the 2002
            STIP shall be calculated by dividing the actual number of hours
            worked by Employee during 2002 (1/1/02 through Termination Date) by
            2080, and Employee shall be entitled to receive the resulting
            percentage of the 2002 STIP. The 2002 STIP shall be subject to
            withholding, deductions, assessments, and taxes, if applicable.

      4.5   Employee shall be entitled to withdraw all accumulated deferred
            compensation under the terms and conditions of the existing deferred
            compensation plan except that, on the Termination Date, Company
            agrees that Employee shall be deemed and considered a terminated
            employee and shall have the right to withdraw such compensation.

      4.6   Employee is covered under Supplemental Executive Life insurance.
            Employee shall continue to be covered under such insurance until
            July 31, 2003, with all premiums paid by Company until July 31,
            2003, at which time Employee shall have the option of converting
            such insurance in strict accordance with the terms of such policy
            and paying any and all premiums due thereon as required by any SERP,
            restoration, life insurance, or other plan maintained by Company as
            though employee had completed 10 years of service under his
            Employment Contract at age 55.

5.    CONFIDENTIALITY

      5.1   Employee shall preserve as confidential all Confidential
            Information. Employee shall not use Confidential Information for the
            benefit of Employee or any third party. Employee shall not disclose
            to others any Confidential Information or any copy or notes made
            from any Item embodying Confidential Information. If Employee is
            required to disclose Confidential Information pursuant to a valid
            order of a court or other governmental entity or any political
            subdivision thereof; then Employee shall first give notice to
            Company so that Company shall have a reasonable opportunity to
            interpose an objection or obtain a protective order requiring that
            the Confidential Information and/or documents so disclosed be used
            only for the purposes for which the order was issued. The
            confidentiality provisions herein shall expire 36 months from the
            date of this agreement.

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6.    NON-COMPETITION

      6.1   Without express consent of the Company's CEO for a period of one
            year after Employee's Termination Date or last serving as outside
            counsel under the terms and provisions of this Agreement and as
            otherwise governed by applicable rules of professional conduct,
            Employee shall not, directly or indirectly, assist, provide services
            or consultation to, enter into, engage in or acquire any ownership
            interest in, or become employed by or associated with, any Competing
            Organization doing business or seeking to commence doing business in
            the Restricted Area. This includes, but is not limited to, services
            rendered to such Competing Organization in an executive, managerial,
            administrative, legal or consulting capacity in connection with
            Competing Products or Services in support of actual competition in
            geographic areas other than where the services are performed and
            thus may fall within the prohibition of the Agreement, regardless of
            where such services physically are rendered. This limitation
            includes, but is not limited to, any contact or solicitation, either
            for Employee's benefit or for the benefit of any other person or
            entity, and Employee will not in any manner assist any person or
            entity in making any such contact or solicitation.

      6.2   Employee shall not solicit any employee of Company to terminate his
            or her employment or relationship with Company or to perform any
            service for employee or for any Competing Organization.

      6.3   Employee agrees that the restrictions set forth in paragraphs 6.1
            and are fair and reasonable and are reasonably required for the
            protection of the interests of the Company and compliance with those
            provisions will not cause Employee undue hardship nor unreasonably
            interfere with Employee's ability to earn a livelihood.

7.    RELEASE

      7.1   Except for rights and benefits under any existing or future
            insurance policy of Company and/or Employee and rights of
            indemnification under any such policies or rights of indemnification
            under the articles or by-laws of Company or under statutory or
            common law, or under any agreement, and/or any claims for benefits
            reserved under this Agreement or claims arising under any breach of
            this Agreement, all of which are expressly reserved, Employee hereby
            waives and releases Company and its officers, directors, agents, and
            employees (collectively referred to as "Company Agents") from any
            claims, rights, contracts or causes of action existing or accrued as
            of the effective date of this Agreement that Employee may have
            against Company or Company Agents (collectively referred to as
            "Claims") which arise out

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            of or are related to Employee's employment with Company
            (collectively referred to as "Release") or the termination of the
            Employment Agreement. This Release includes, but is not limited to,
            the following:

            7.1.1 Claims which are known or unknown as of the effective date
                  of this Agreement;

            7.1.2 Claims which arise under any state or federal laws, including,
                  but not limited to, the Civil Rights Act of 1964, as amended,
                  and the Age Discrimination in Employment Act of 1967, as
                  amended, which have arisen on or before the effective date of
                  this Agreement; and

            7.1.3 Claims based upon any contract of employment, including but
                  not limited to, the Change in Control Agreement, except as set
                  forth herein.

      7.2   Employee shall not commence any action against Company or Company
            Agents in violation of this Release.

      7.3   Employee does not waive any Claim which arises after the effective
            date of this Agreement.

      7.4   Employee further expressly acknowledges and agrees that:

            7.4.1 Employee has been advised to consult with an attorney
                  before signing this Agreement;

            7.4.2 This Agreement is being offered only to Employee at this
                  time.

            7.4.3 Employee was given a copy of the Agreement on or about August
                  __, 2002. Employee was informed that Employee had 21 days
                  within which to consider the Agreement. If Employee fails to
                  execute this Agreement within said 21-day period, then the
                  terms and conditions contained in this Agreement are
                  automatically withdrawn without further action or notice by
                  Company.

            7.4.4 Employee was informed and understands that Employee has seven
                  days following the date Employee executes this Agreement in
                  which to revoke this Agreement. Any revocation of the
                  Agreement must be in writing and delivered to the Vice
                  President of Human Resources of Company during the revocation
                  period. This Agreement will become effective and enforceable
                  seven days following execution by Employee, unless it is
                  revoked during the seven-day period.

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<PAGE>
8.    MISCELLANEOUS PROVISIONS

      8.1.  Confidentiality of Agreement: Unless and until the terms of this
            Agreement, and the amount of any payment eligible to be paid or
            actually paid under this Agreement, are disclosed in writing to the
            public by Company pursuant to any applicable legal duty to disclose
            such information, it shall be a condition of eligibility to receive
            or retain any payment pursuant to this Agreement that Employee hold
            the terms of this Agreement and the amount of any payment hereunder
            in strict confidence. Employee may disclose such information on a
            confidential basis to Employee's family and to any financial
            counselor, tax advisor or legal counsel retained by Employee.

      8.2   Assignment by Company: The obligations of Company hereunder shall be
            the obligations of any and all successors and assigns of Company.
            Company may assign this Agreement without Employee's consent to any
            affiliate or subsidiary of Company, provided that such assignment
            does not relieve the Company's obligations hereunder. Company may
            assign this Agreement without Employee's consent to any company that
            acquires all or substantially all of the stock or assets of Company,
            or into which or with which Company is merged or consolidated. The
            Employee may not assign the Agreement, and no person other than
            Employee or Employee's estate may enforce the rights of Employee
            under this Agreement.

      8.3   Waiver: The waiver by Employee or Company of a violation or breach
            respectively by Company or by Employee of any provision of this
            Agreement shall not be construed as a waiver of any subsequent
            violation or breach.

      8.4   Severability: The provisions of this Agreement shall be severable,
            and in the event that any portion or provision of it is found by any
            court to be unenforceable, in whole or in part, the remainder of
            this Agreement shall nevertheless be enforceable and binding on the
            parties. In the event that any restriction set forth in this
            Agreement shall be declared by a court of competent jurisdiction to
            exceed the maximum restriction such court deems reasonable and
            enforceable, the restriction deemed reasonable and enforceable by
            the court shall become and thereafter be the maximum restriction
            hereunder.

      8.5   Review of Agreement: Employee acknowledges that Employee had
            sufficient opportunity to review this Agreement with an attorney or,
            if Employee did not do so, it is because Employee read and
            understood this Agreement and did not believe that legal advice was
            necessary.

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<PAGE>
            Employee agrees that any restrictions contained in this Agreement
            are fair and appropriate under the circumstances.

      8.6   Dispute Resolution: Any dispute between the parties which is covered
            by, arises out of, or is based upon this Agreement shall be settled
            by final and binding arbitration. Any award or determination
            rendered by the arbitrator may be entered as a judgment in any court
            having jurisdiction thereof. The arbitration is subject to the
            following:

            8.6.1 The arbitration shall be administered by the American
                  Arbitration Association ("AAA") in accordance with its
                  Employment Dispute Resolution Rules ("Rules") in effect at the
                  time of the arbitration.

            8.6.2 The arbitration shall be heard by one neutral arbitrator. The
                  arbitrator shall be an attorney admitted to the practice of
                  law in at least one state.

            8.6.3 The arbitrator shall have the authority to award any remedy or
                  relief that a state or federal court having jurisdiction over
                  the persons and subject matter is authorized to grant.

            8.6.4 The Company shall pay all of the costs and/or fees charged by
                  AAA and the arbitrator. The arbitrator shall have the
                  authority to award attorney's fees and costs pursuant to
                  sub-section 8.6.3 above.

      8.7   Jurisdiction: This Agreement shall be construed under the laws of
            the State of Nevada except where Federal laws are applicable. Venue
            for any arbitration or action to enforce the arbitration provisions
            of this Agreement shall be in the State of Nevada.

      8.8   Effective Date: This Agreement will become effective and enforceable
            seven days following execution by Employee, unless it is revoked
            during the seven-day period in accordance with the provisions of
            7.4.4 above.

      8.9   Final Agreement: This Agreement supercedes all prior understandings,
            statements or agreements concerning the subject matter of this
            Agreement, including the Employment Agreement or Change in Control
            Agreement. Any amendment to this Agreement shall be in writing and
            signed by both parties. This Agreement contains all of the terms and
            conditions agreed upon by the parties. There are no understandings
            or agreements which conflict or modify the terms of this Agreement.
            Company has made no representations or promises upon which Employee
            relies in signing this Agreement except the

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            terms set forth herein. Company has made no representations upon
            which Employee relies concerning the tax characteristics or status
            of the benefits described in this Agreement.

      8.10  Cooperation. Company and Employee agree to cooperate fully and
            execute any and all supplementary documents and to take all
            additional actions which may be necessary or appropriate to give
            full force and effect to the terms and intent of this Agreement

      8.11  Binding Obligation. Company represents and warrants to Employee that
            Company has taken all requisite corporate action to approve this
            Agreement and that this Agreement constitutes a valid, binding and
            enforceable obligation of the Company.

COMPANY                                   WILLIAM E. PETERSON

By:___________________________            _____________________________

Date:  September ____, 2002               Date:  September  ____, 2002

                                       10<PAGE>
                                                                   Exhibit 10(C)
Western Systems Power Pool .
Rate Schedule FERC No. 6

                           WESTERN SYSTEMS POWER POOL

                                    AGREEMENT

Issued by:  Michael E. Small, General Counsel to   Effective:  September 1, 2002
            Western Systems Power Pool

Issued on:  July 2, 2002
<PAGE>
Western Systems Power Pool                                  Original Sheet No. 1
Rate Schedule FERC No. 6

                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                            PAGE
<S>   <C>                                                                   <C>
1.    PARTIES................................................................4

2.    RECITALS...............................................................4

3.    AGREEMENT..............................................................5

4.    DEFINITIONS............................................................5

5.    TERM AND TERMINATION..................................................11

6.    SERVICE SCHEDULES AND WSPP DEFAULT TRANSMISSION TARIFF................12

7.    HUB AND OPERATING AGENT...............................................13

8.    ORGANIZATION AND ADMINISTRATION.......................................16

9.    PAYMENTS..............................................................20

10.   UNCONTROLLABLE FORCES.................................................22

11.   WAIVERS...............................................................24

12.   NOTICES...............................................................24

13.   APPROVALS.............................................................25

14.   TRANSFER OF INTEREST IN AGREEMENT.....................................27

15.   SEVERABILITY..........................................................28

16.   MEMBERSHIP............................................................28

17.   RELATIONSHIP OF PARTIES...............................................29

18.   NO DEDICATION OF FACILITIES...........................................30
</TABLE>

Issued by:  Michael E. Small, General Counsel to         Effective: July 1, 2000
            Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission, Docket
Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                             First Revised Sheet No. 2
Rate Schedule FERC No. 6                        Superseding Original Sheet No. 2

                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                            PAGE
<S>   <C>                                                                   <C>
19.   NO RETAIL SERVICES....................................................30

20.   THIRD PARTY BENEFICIARIES.............................................30

21.   LIABILITY AND DAMAGES.................................................30

22.   DEFAULT OF TRANSACTIONS UNDER THIS AGREEMENT AND
      CONFIRMATION AGREEMENTS...............................................34

23.   OTHER AGREEMENTS......................................................43

24.   GOVERNING LAW.........................................................43

25.   JUDGMENTS AND DETERMINATIONS..........................................43

26.   COMPLETE AGREEMENT....................................................44

27.   CREDITWORTHINESS......................................................44

28.   NETTING AND SET-OFF...................................................46

29.   TAXES................................................................47A

30.   CONFIDENTIALITY.......................................................48

31.   TRANSMISSION TARIFF...................................................49

32.   TRANSACTION SPECIFIC TERMS AND ORAL AGREEMENTS........................49

33.   PERFORMANCE, TITLE, AND WARRANTIES FOR TRANSACTIONS
      UNDER SERVICE SCHEDULES..............................................52A

34.   DISPUTE RESOLUTION....................................................53

35.   FORWARD CONTRACTS.....................................................56
</TABLE>

Issued by:  Michael E. Small, General Counsel to        Effective: March 1, 2002
            Western Systems Power Pool
Issued on:  December 21, 2001
<PAGE>
Western Systems Power Pool                           Third Revised Sheet No. 3
Rate Schedule FERC No. 6                Superseding Second Revised Sheet No. 3

                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                           PAGE
<S>   <C>                                                                  <C>
36.   TRADE OPTION EXCEPTION................................................56

37.   ADDITIONAL REPRESENTATIONS AND WARRANTIES.............................57

38.   FLOATING PRICES.......................................................58

39.   AMENDMENT............................................................58B

40.   EXECUTION BY COUNTERPARTS............................................58B

41.   WITNESS...............................................................59
</TABLE>

EXHIBIT A:  NETTING

EXHIBIT B:  FORM OF COUNTERPARTY GUARANTEE AGREEMENT

EXHIBIT C:  SAMPLE FORM FOR CONFIRMATION

EXHIBIT D:  WSPP MEDIATION AND ARBITRATION PROCEDURES

SERVICE SCHEDULES

      A.    ECONOMY ENERGY SERVICE

      B.    UNIT COMMITMENT SERVICE

      C.    FIRM CAPACITY/ENERGY SALE OR EXCHANGE SERVICE

LIST OF MEMBERS

Issued by:  Michael E. Small, General Counsel to        Effective: March 1, 2002
                  Western Systems Power Pool
Issued on:  December 21, 2001
<PAGE>
Western Systems Power Pool                                  Original Sheet No. 4
Rate Schedule FERC No. 6

1.    PARTIES:

            The Parties to this Western Systems Power Pool Agreement
            (hereinafter referred to as "Agreement") are those entities that
            have executed this Agreement, hereinafter sometimes referred to
            individually as "Party" and collectively as "Parties," but excluding
            any such entity that withdraws its participation in the Agreement.

2.    RECITALS:

      2.1   The WSPP experiment has been successfully concluded. Its main
            purpose was to determine the feasibility of a marketing arrangement
            which would increase the efficiency of interconnected power system
            operations above that already being accomplished with existing
            agreements through increased market knowledge and market pricing of
            commodities.

      2.2   The Parties now desire to proceed with a similar marketing
            arrangement on a long term basis for prescheduled and real-time
            coordinated power transactions, such as economy energy transactions,
            unit commitment service, firm system capacity/energy sales or
            exchanges. Accordingly, this Agreement, together with any applicable
            Confirmation Agreement, sets forth the terms and conditions to
            implement these services within any applicable rate ceilings set
            forth in the Service Schedules in conformance with FERC orders where
            applicable.

Issued by:  Michael E. Small, General Counsel to         Effective: July 1, 2000
            Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission, Docket
Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                             First Revised Sheet No. 5
Rate Schedule FERC No. 6                        Superseding Original Sheet No. 5

      2.3   Each Party meets the membership requirements set out in Section
            16.

      2.4   The Parties are willing to utilize their respective electric
            generation and transmission systems or contractual rights thereto to
            the extent of their respective obligations which are set forth in
            this Agreement.

3.    AGREEMENT:

            In consideration of the mutual covenants and promises herein set
            forth, the Parties agree as follows:

4.    DEFINITIONS:

            The following terms, when used herein with initial capitalization,
            whether in the singular or in the plural, shall have the meanings
            specified:

      4.1   Agreement: This Western Systems Power Pool Agreement, including the
            Service Schedules and Exhibits attached hereto, as amended;
            provided, however, that Confirmation Agreements are not included
            within this definition.

      4.1a  Broker: An entity or person that arranges trades or brings together
            Purchasers and Sellers without taking title to the power.

      4.1b  Business Day(s): Any day other than a Saturday or Sunday or a
            national (United States or Canadian, whichever is applicable)
            holiday. United States holidays shall be holidays observed by
            Federal Reserve member banks in New York City. Where both the Seller
            and the Purchaser have their principal place of business in the
            United States, Canadian holidays shall not apply. Similarly, where
            both the

Issued by:  Michael E. Small, General Counsel to        Effective: March 1, 2002
                  Western Systems Power Pool
Issued on:  December 21, 2001
<PAGE>
Western Systems Power Pool                             Third Revised Sheet No. 6
Rate Schedule FERC No. 6                  Superseding Second Revised Sheet No. 6

            Seller and the Purchaser have their principal place of business in
            Canada, United States holidays shall not apply. In situations where
            one Party has its principal place of business within the United
            States and the other Party's principal place of business is within
            Canada, both United States and Canadian holidays shall be observed.

      4.1c  California ISO:  The California Independent System Operator
            Corporation or any successor organization.

      4.1d  Confirmation Agreement(s): Any oral agreement or written
            documentation for transactions under the Service Schedules which
            sets forth terms and conditions for transactions that are in
            addition to, substitute, or modify those set forth in the Agreement.
            A sample written confirmation document is included as Exhibit C.
            Section 32 of this Agreement provides for such Confirmation
            Agreements. The Parties may agree to modify terms of this Agreement
            for more than one transaction pursuant to a separate written
            agreement. The changes to the Agreement agreed to through such
            written agreements shall be considered part of the Confirmation
            Agreement and shall apply to all transactions entered into between
            the two Parties under the Agreement unless the Parties specifically
            agree to override such changes for a particular transaction
            consistent with Section 32 of this Agreement.

      4.1e  Contract Price:  The price agreed to between the Seller and the
            Purchaser for a transaction under the Agreement and any
            Confirmation Agreement.

Issued by:  Michael E. Small, General Counsel to    Effective: September 1, 2002
                  Western Systems Power Pool
Issued on:  July 2, 2002
<PAGE>
Western Systems Power Pool                           Second Revised Sheet No. 6A
Rate Schedule FERC No. 6                  Superseding First Revised Sheet No. 6A

      4.1f  Contract Quantity: The amount of electric energy and/or capacity to
            be supplied for a transaction under a Service Schedule as agreed to
            through any Confirmation Agreement.

      4.2   Control Area: Shall mean an electric system capable of regulating
            its generation in order to maintain its interchange schedule with
            other electric systems and to contribute its frequency bias
            obligation to the interconnection as specified in the North American
            Electric Reliability Council (NERC) Operating Guidelines.

      4.2a  Costs:  As defined in Section 22.3 of this Agreement.

      4.2b  Dealer:  An entity or person that buys or sells power and takes
            title to the power at some point.

      4.2c  Defaulting Party:  As defined in Section 22.1 of this Agreement.

      4.2d  Determination Period:  As defined in Section 38.2 of this
            Agreement.

      4.3   Economy Energy Service: Non-firm energy transaction whereby the
            Seller has agreed to sell or exchange and the Purchaser has agreed
            to buy or exchange energy that is subject to immediate interruption
            upon notification, in accordance with the Agreement, including
            Service Schedule A, and any applicable Confirmation Agreement.

Issued by:  Michael E. Small, General Counsel to    Effective: September 1, 2002
                  Western Systems Power Pool
Issued on:  July 2, 2002
<PAGE>
Western Systems Power Pool                            Second Revised Sheet No. 7
Rate Schedule FERC No. 6                   Superseding First Revised Sheet No. 7

      4.4   Electric Utility: An entity or lawful association which (i) is a
            public utility, Independent Power Producer, or Power Marketer
            regulated under applicable state law or the Federal Power Act, or
            (ii) is exempted from such regulation under the Federal Power Act
            because it is the United States, a State or any political
            subdivision thereof or an agency of any of the foregoing, or a Rural
            Utilities Service cooperative, or (iii) is a public utility,
            Independent Power Producer, or Power Marketer located in Canada or
            Mexico that is similarly regulated.

      4.4a  ERCOT:  Electric Reliability Council of Texas, Inc., the
            corporation that administers Texas's power grid and is a regional
            reliability council.

      4.4b  Event of Default:  As defined in Section 22.1 of this Agreement.

      4.5   Executive Committee:  That committee established pursuant to
            Section 8 of this Agreement.

      4.6   FERC:  The Federal Energy Regulatory Commission or its regulatory
            successor.

      4.7   Firm Capacity/Energy Sale or Exchange Service: Firm capacity and/or
            energy transaction whereby the Seller has agreed to sell or exchange
            and the Purchaser has agreed to buy or exchange for a specified
            period available capacity with or without associated energy which
            may include a Physically-Settled Option and a capacity transaction
            in accordance with the Agreement, including Service Schedule C, and
            any applicable Confirmation Agreement.

Issued by:  Michael E. Small, General Counsel to    Effective: September 1, 2002
                  Western Systems Power Pool
Issued on:  July 2, 2002
<PAGE>
Western Systems Power Pool                               Original Sheet No. 7A
Rate Schedule FERC No. 6

      4.7a  First Party:  As defined in Section 27 of this Agreement.

      4.7b  Floating Price:  As defined in Section 38.1 of this Agreement.

      4.7c  Gains:  As defined in Section 22.3 of this Agreement.

      4.7d  Guarantee Agreement:  An agreement providing a guarantee issued
            by a parent company or another entity guaranteeing responsibility
            for specific obligations for transactions under this Agreement and
            Confirmation Agreements. A sample form of guarantee is provided in
            Exhibit B.

      4.7e  Guarantor: The entity providing a guarantee pursuant to a Guarantee
            Agreement.

Issued by:  Michael E. Small, General Counsel to    Effective: September 1, 2002
                  Western Systems Power Pool
Issued on:  July 2, 2002
<PAGE>
Western Systems Power Pool                          Second Revised Sheet No. 8
Rate Schedule FERC No. 6                 Superseding First Revised Sheet No. 8

      4.8   Hub: An electronic communication center that functions as a central
            point to electronically receive and assemble data for offers to buy
            or sell power or transmission service from each Party and make that
            data electronically available concurrently to all Parties.

      4.9   Incremental Cost:  The forecasted expense incurred by the Seller
            in providing an additional increment of energy or capacity during
            a given hour.

      4.10  Independent Power Producer:  An entity which is a non-traditional
            public utility that produces and sells electricity but which does
            not have a retail service franchise.

      4.11  Interconnected Transmission System:  The total of all
            transmission facilities owned or operated by the Parties,
            including transmission facilities over which Parties have
            scheduling rights.

      4.11a Letter of Credit: An irrevocable, transferable, standby letter of
            credit, issued by an issuer acceptable to the Party requiring the
            Letter of Credit.

      4.11b Losses:  As defined in Section 22.3 of this Agreement.

      4.11c Market Disruption Event:  As defined in Section 38.2 of this
            Agreement.

      4.11d NERC:  North American Electric Reliability Council or any
            successor organization.

      4.11e Non-Defaulting Party: As defined in Section 22.1(a) of this
            Agreement.

      4.11f Non-Performing Party: As defined in Section 21.3(a) of this
            Agreement.

Issued by:  Michael E. Small, General Counsel to    Effective: September 1, 2002
                  Western Systems Power Pool
Issued on:  July 2, 2002
<PAGE>
Western Systems Power Pool                               Original Sheet No. 8A
Rate Schedule FERC No. 6

      4.11g Non-Standard Confirmation Provisions: As defined in Section 32.5 of
            this Agreement.

      4.11h NYMEX: New York Mercantile Exchange, the physical commodity futures
            exchange and a trading forum for energy and precious metals.

      4.12  Operating Agent:  Arizona Public Service Company, or its
            successor as may be designated by the Executive Committee.

      4.13  Operating Committee:  That committee established pursuant to
            Section 8 of this Agreement.

      4.13a Party or Parties:  As defined in Section 1 of this Agreement.

      4.13b Performing Party:  As defined in Section 21.3(a) of this
            Agreement.

Issued by:  Michael E. Small, General Counsel to    Effective: September 1, 2002
                  Western Systems Power Pool
Issued on:  July 2, 2002
<PAGE>
Western Systems Power Pool                           First Revised Sheet No. 9
Rate Schedule FERC No. 6                      Superseding Original Sheet No. 9

      4.14  Power Marketer: An entity which buys, sells, and takes title to
            electric energy, transmission and/or other services from traditional
            utilities and other suppliers.

      4.14a Physically-Settled Option: Includes (i) a call option which is the
            right, but not the obligation, to buy an underlying power product as
            defined under Service Schedules B or C according to the price and
            exercise terms set forth in the Confirmation Agreement; and (ii) a
            put option which is the right, but not the obligation, to sell an
            underlying power product as defined under Service Schedules B or C
            according to the price and exercise terms set forth in the
            Confirmation Agreement.

      4.14b Premium: The amount paid by the Purchaser of a Physically-Settled
            Option to the Seller of such Option by the date agreed to by the
            Parties in the Confirmation Agreement.

      4.14c Present Value Rate:  As defined in Section 22.3(b) of this
            Agreement.

      4.15  Purchaser: Any Party which agrees to buy or receive from one or more
            of the other Parties any service pursuant to the Agreement under any
            Service Schedule and any applicable Confirmation Agreement.

      4.16  Qualifying Facility: A facility which is a qualifying small power
            production facility or a qualifying cogeneration facility as these
            terms are defined in Federal Power Act Sections 3(17)(A), 3(17)(C),
            3(18)(A), and 3(18)(B); which meets the requirements set forth in 18
            C.F.R. Sections 292.203-292.209; or a facility in Canada or
            Mexico that complies with similar requirements.

Issued by:  Michael E. Small, General Counsel to    Effective: September 1, 2002
                  Western Systems Power Pool
Issued on:  July 2, 2002
<PAGE>
Western Systems Power Pool                         Second Revised Sheet No. 10
Rate Schedule FERC No. 6                Superseding First Revised Sheet No. 10

      4.16a Replacement Price: The price at which the Purchaser, acting in a
            commercially reasonable manner, effects a purchase of substitute
            electric energy in place of the electric energy not delivered by the
            Seller or, absent such a purchase, the market price for such
            quantity of electric energy, as determined by the Purchaser in a
            commercially reasonable manner, at the delivery point (agreed upon
            by the Seller and the Purchaser for the transaction).

      4.16b Retail Entity: A retail aggregator or supplier or retail customer;
            provided, however, only those Retail Entities eligible for
            transmission service under the FERC's pro forma open access
            transmission tariff are eligible to become members of the WSPP.

      4.16c Sales Price: The price at which the Seller, acting in a commercially
            reasonable manner, effects a resale of the electric energy not
            received by the Purchaser or, absent such a resale, the market price
            for such quantity of electric energy at the delivery point (agreed
            upon by the Seller and the Purchaser), as determined by the Seller
            in a commercially reasonable manner.

      4.16d Second Party:  As defined in Section 27 of this Agreement.

      4.17  Seller:  Any Party which agrees to sell or provide to one or more
            of the other Parties any service pursuant to the Agreement under any
            Service Schedule and any applicable Confirmation Agreement.

      4.18  Service Schedule:  A schedule of services established pursuant to
            Section 6 of this Agreement.

Issued by:  Michael E. Small, General Counsel to    Effective: September 1, 2002
                  Western Systems Power Pool
Issued on:  July 2, 2002
<PAGE>
Western Systems Power Pool                         First Revised Sheet No. 10A
Rate Schedule FERC No. 6                    Superseding Original Sheet No. 10A

      4.18a Successor in Operation: The successor entity which takes over the
            wholesale electric trading operations of the first entity either
            through a merger or restructuring. A Successor in Operation shall
            not include an entity which merely acquires power sales contracts
            from the first entity either through a purchase or other means
            without taking over the wholesale electric trading operations of the
            first entity.

      4.18b Terminated Transaction:  As defined in Section 22.2 of this
            Agreement.

      4.18c Termination Payment:  As defined in Section 22.2 of this
            Agreement.

      4.18d Trading Day:  As defined in Section 38.2 of this Agreement.

      4.19  Uncontrollable Forces:  As defined in Section 10 of this
            Agreement or in a Confirmation Agreement.

      4.20  Unit Commitment Service: A capacity and associated scheduled
            energy transaction or a Physically-Settled Option which the Seller
            has agreed to sell and the Purchaser has agreed to buy from a
            specified unit(s) for a specified period, in

Issued by:  Michael E. Small, General Counsel to    Effective: September 1, 2002
                  Western Systems Power Pool
Issued on:  July 2, 2002
<PAGE>
Western Systems Power Pool                          First Revised Sheet No. 11
Rate Schedule FERC No. 6                     Superseding Original Sheet No. 11

            accordance with the Agreement, including Service Schedule B, and any
            applicable Confirmation Agreement.

      4.20a WSPP:  The Western Systems Power Pool.

      4.20b WSPP Default Transmission Tariff: The transmission tariff filed on
            behalf of WSPP Members with FERC as it may be amended from time to
            time.

      4.20c WSPP Homepage:  WSPP's internet web site, www.wspp.org.

5.    TERM AND TERMINATION:

      5.1   This Agreement shall become effective as of July 27, 1991 when
            acceptance or approvals required under Section 13.2 of this
            Agreement with respect to those Parties that are subject to FERC
            jurisdiction have been obtained; provided, however, that this
            Agreement shall not become effective as to any Party in the event
            the pre-grant of termination requested under Section 13.3 is not
            allowed by FERC, absent that Party's consent; and provided, further,
            that this Agreement shall not become effective as to any Party if
            any terms, conditions or requirements imposed by FERC are found
            unacceptable by that Party. This Agreement shall continue in effect
            for a period of ten (10) years from said effective date and
            thereafter on a year to year basis until terminated by the Parties;
            provided, however, that any Party may withdraw its participation at
            any time after the effective date of this Agreement on thirty (30)
            days prior written notice to all other Parties.

Issued by:  Michael E. Small, General Counsel to    Effective: September 1, 2002
                  Western Systems Power Pool
Issued on:  July 2, 2002
<PAGE>
Western Systems Power Pool                              Original Sheet No. 11A
Rate Schedule FERC No. 6

      5.2   As of the effective date of any withdrawal, the withdrawing Party
            shall have no further rights or obligations under this Agreement
            except the right to collect

Issued by:  Michael E. Small, General Counsel to    Effective: September 1, 2002
                  Western Systems Power Pool
Issued on:  July 2, 2002
<PAGE>
Western Systems Power Pool                          First Revised Sheet No. 12
Rate Schedule FERC No. 6                     Superseding Original Sheet No. 12

            money or receive service owed to it for transactions under any
            Service Schedule and the obligation to pay such amounts due to
            another Party and to complete any transactions agreed to under any
            Service Schedule as of said date. No Party shall oppose, before any
            court or regulatory agencies having jurisdiction, any other Party's
            withdrawal as provided in this Section.

      5.3   Except as provided for in Section 5.2, after termination, or
            withdrawal with respect to the withdrawing Party, all rights to
            services provided under this Agreement or any tariff or rate
            schedule which results from or incorporates this Agreement shall
            cease, and no Party shall claim or assert any continuing right to
            such services under this Agreement. Except as provided for in
            Section 5.2, no Party shall be required to provide services based in
            whole or in part on the existence of this Agreement or on the
            provision of services under this Agreement beyond the termination
            date, or date of withdrawal with respect to the withdrawing Party.

6.    SERVICE SCHEDULES AND WSPP DEFAULT TRANSMISSION TARIFF:

      6.1   The Parties contemplate that they may, from time to time, add or
            remove Service Schedules under this Agreement. The attached Service
            Schedules A through C for Economy Energy Service, Unit Commitment
            Service, and Firm Capacity/Energy Sale or Exchange Service are
            hereby approved and made a part of this Agreement. Nothing contained
            herein shall be construed as affecting in any way the right of the
            Parties to jointly make application to FERC for a change

Issued by:  Michael E. Small, General Counsel to    Effective: September 1, 2002
                  Western Systems Power Pool
Issued on:  July 2, 2002
<PAGE>
Western Systems Power Pool                               Original Sheet No. 13
Rate Schedule FERC No. 6

            in the rates and charges, classification, service, terms, or
            conditions affecting WSPP transactions under Section 205 of the
            Federal Power Act and pursuant to FERC rules and regulations
            promulgated thereunder. Subject to the provisions of Section 13,
            future Service Schedules, if any, shall be adopted only by amendment
            of this Agreement and shall be attached hereto and become a part of
            this Agreement.

      6.2   [RESERVED]

      6.3   When the WSPP Default Transmission Tariff applies as specified in
            the preamble to such Default Transmission Tariff, Transmission
            Service under it shall be available both to Parties and nonParties
            under this Agreement; provided, however, each Party or nonParty must
            be an eligible customer under the WSPP Default Transmission Tariff
            in order to receive service.

7.    HUB AND OPERATING AGENT:

      7.1   The Operating Agent shall act for itself and as agent for the
            Parties to carry out its designated responsibilities under this
            Agreement.

      7.2   The Operating Agent shall, as directed by the Operating Committee
            pursuant to Section 8.2.4, and on behalf of the Parties, either (i)
            purchase or lease, and install or have installed, operate and
            maintain the necessary equipment to operate the Hub or (ii) contract
            for Hub services.

Issued by:  Michael E. Small, General Counsel to        Effective: July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission, Docket
Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                                 Original Sheet No. 14
Rate Schedule FERC No. 6

      7.3   The Operating Agent's estimated total costs to be incurred under
            Section 7.2 shall be subject to review by the Operating Committee
            and approval by the Executive Committee.

      7.4   At least sixty (60) days prior to each calendar year that this
            Agreement is in effect, the Operating Agent shall prepare a budget
            for said year of operation under this Agreement and shall submit
            same to the Operating Committee for review, and to the Executive
            Committee for approval. Subsequent budget revisions shall be
            submitted to the Operating Committee for review and to the Executive
            Committee for approval.

      7.5   The Operating Agent shall perform other administrative tasks
            necessary to implement this Agreement as directed by the Executive
            Committee.

      7.6   Except as provided in Section 7.7, all Parties shall share equally
            in all costs of the Operating Agent incurred under this Agreement,
            including but not limited to initial FERC filing fees and any
            reasonable legal fees.

      7.7   Each Party, in coordination with the Operating Agent, shall at its
            own expense acquire, install, operate, and maintain all necessary
            software and hardware on its system and the necessary communications
            link to the Hub to conduct transactions under this Agreement.

      7.8   The Operating Agent shall bill the Parties for costs incurred under
            this Agreement on an estimated basis reasonably in advance of when
            due, and such billings shall be paid by the Parties when due. Such
            billings shall be adjusted in the following

Issued by:  Michael E. Small, General Counsel to         Effective: July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                                 Original Sheet No. 15
Rate Schedule FERC No. 6

            month(s) to reflect recorded costs. Billing and payment of the
            Operating Agent's costs shall otherwise be implemented in accordance
            with the provisions of Section 9.

      7.9   The Operating Agent, at reasonable times and places, shall make
            available its records and documentation supporting costs for bills
            rendered under this Agreement for the inspection of any Party for a
            period of time not to exceed two (2) years from the time such bills
            were rendered.

            7.9.1 A Party requesting review of the Operating Agent's records
                  shall give the Operating Agent sufficient notice of its
                  intent, but in no event less than thirty (30) days.

            7.9.2 The requesting Party may perform this review using personnel
                  from its own staff or designate a certified public accounting
                  firm for the purpose of this review.

            7.9.3 All costs incurred to perform this review shall be at the
                  requesting Party's own expense.

            7.9.4 The Party performing the review shall not voluntarily release
                  the Operating Agent's records or disclose any information
                  contained therein to any third party unless the written
                  consent of the Operating Agent and the Executive Committee has
                  been obtained.

      7.10  Upon the termination of this Agreement, unless otherwise directed by
            the Executive Committee, the Operating Agent shall either dispose of
            any Hub

Issued by:  Michael E. Small, General Counsel to         Effective: July 1, 2000
                  Western Systems Power Pool
Issued on: September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                                 Original Sheet No. 16
Rate Schedule FERC No. 6

            equipment which it has purchased, or have the right of first refusal
            to purchase such equipment at original cost less depreciation, and
            shall apply any net proceeds from the sale of the Hub equipment
            against its costs incurred under this Agreement. The Operating Agent
            shall refund any excess proceeds equally to the Parties.

8.    ORGANIZATION AND ADMINISTRATION:

            As a means of securing effective and timely cooperation within the
      activities hereunder and as a means of dealing on a prompt and orderly
      basis with various problems which may arise in connection with system
      coordination and operation under changing conditions, the Parties hereby
      establish an Executive Committee and an Operating Committee.

      8.1   Executive Committee:

                  The Executive Committee shall consist of one representative
            and an alternate from each Party designated pursuant to Section 8.5
            herein. The responsibilities of the Executive Committee are as
            follows:

            8.1.1 To establish sub-committees as it may from time to time
                  deem necessary.

            8.1.2 To review at least annually the service activities hereunder
                  to ensure that such activities are consistent with the spirit
                  and intent of this Agreement.

            8.1.3 To review any unresolved issues which may arise hereunder and
                  endeavor to resolve the issues.

Issued by:  Michael E. Small, General Counsel to         Effective: July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                                 Original Sheet No. 17
Rate Schedule FERC No. 6

            8.1.4  To review and approve the Operating Agent's annual budget
                   under this Agreement, and any revision thereto, within thirty
                   (30) days of recommendation by the Operating Committee.

            8.1.5  To establish and approve any additional budgets under this
                   Agreement as may be deemed necessary.

            8.1.6  To review and recommend to the Parties for approval any
                   additions or amendments to this Agreement, including Service
                   Schedules.

            8.1.7  To review and act on the application of an entity to become
                   a Party to this Agreement.
            8.1.8  To designate a successor to the Operating Agent, if
                   necessary.
            8.1.9  To do such other things and carry out such duties as
                   specifically required or authorized by this Agreement;
                   provided, however, that the Executive Committee shall have no
                   authority to amend this Agreement.

            8.1.10 To notify any Party of the rescission of its interest in this
                   Agreement due to its failure to continue to meet the
                   requirements of Section 16.1.

            8.1.11 To arrange for legal representation for filing this Agreement
                   (and any subsequent amendments) with FERC and supporting the
                   Agreement (or amendments) in any FERC proceeding, and for
                   other purposes as required.

      8.2   Operating Committee:

Issued by:  Michael E. Small, General Counsel to         Effective: July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 18
Rate Schedule FERC No. 6

                  The Operating Committee shall consist of one representative
            and an alternate from each Party designated pursuant to Section 8.5.
            The responsibilities of the Operating Committee are as follows:

            8.2.1 To establish, review, approve, or modify procedures and
                  standard practices, consistent with the provisions hereof, for
                  the guidance of load dispatchers and other operating employees
                  in the Parties' electric systems as to matters affecting
                  transactions under this Agreement.

            8.2.2 To submit to the Executive Committee any proposed new or
                  revised Service Schedules.
            8.2.3 To establish, review, approve, or modify any scheduling or
                  operating procedures required in connection with transactions
                  under this Agreement.

            8.2.4 To direct the Operating Agent in matters governed by this
                  Agreement.
            8.2.5 To review and make recommendations to the Executive Committee
                  for approval of the Operating Agent's annual budget under this
                  Agreement, including any proposed revisions thereto, within
                  thirty (30) days of receipt from the Operating Agent.

            8.2.6 To review and recommend as necessary the types and arrangement
                  of equipment for intersystem communication facilities to
                  enhance transactions and benefits under this Agreement.

            8.2.7 To review the Operating Agent's estimated total costs of
                  providing, having provided or contracting for a Hub.

Issued by:  Michael E. Small, General Counsel to         Effective: July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission, Docket
Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 19
Rate Schedule FERC No. 6

            8.2.8 To review new member applications for membership to this
                  Agreement and make recommendations on said applications to the
                  Executive Committee.

            8.2.9 To do such other things and carry out such duties as
                  specifically required or authorized by this Agreement or as
                  directed by the Executive Committee; provided, however, that
                  the Operating Committee shall have no authority to amend this
                  Agreement.

      8.3   All matters which require Operating Committee or Executive Committee
            approval as provided in this Agreement shall be by no less than
            ninety percent (90%) affirmative agreement of the committee members
            present.

      8.4   Unless otherwise agreed by all committee members, the chairperson of
            each committee shall provide the other Parties at least ten (10)
            Business Days advance notification of all committee meetings,
            including an agenda of matters to be discussed and voted on at the
            meeting. All material issues to be submitted to a vote of the
            committee shall appear on the agenda. Prior to the selection of a
            chairperson the Operating Agent shall provide such advance notice
            for the initial meeting of each committee.

      8.5   Each Party shall give written notice to the other Parties of the
            name of its designated representative and alternate representative
            (to act in the absence of the designated representative) on each
            committee within thirty (30) days after the execution of this
            Agreement. Notice of any change of representative or alternate

Issued by:  Michael E. Small, General Counsel to         Effective: July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                          First Revised Sheet No. 20
Rate Schedule FERC No. 6                     Superseding Original Sheet No. 20

            representative shall be given by written notice to the other
            Parties. Each Party's designated representative shall be authorized
            to act on its behalf with respect to those committee
            responsibilities provided herein.

      8.6   Each committee shall meet as necessary or at the request of any
            Party.

      8.7   Each committee shall elect a chairperson and other officers at its
            first meeting.

9.    PAYMENTS:

      9.1   The accounting and billing period for transactions under Service
            Schedules to this Agreement shall be one (1) calendar month, unless
            otherwise specified in a Service Schedule agreed to through a
            Confirmation Agreement. Bills sent to any Party shall be sent to the
            appropriate billing address as set forth on the WSPP homepage or as
            otherwise specified by such Party.

      9.2   Payments for amounts billed under Service Schedules hereto shall be
            paid so that such payments are received by the Party to be paid on
            the 20th day of the invoicing month or the tenth (10) day after
            receipt of the bill, whichever is later. Notwithstanding the
            foregoing, Premiums shall be paid within three (3) Business Days of
            receipt of the invoice therefor. Payment shall be made at the
            location designated by the Party to which payment is due. Payment
            shall be considered received when payment is received by the Party
            to which Payment is due at the location designated by that Party. If
            the due date falls on a non-Business Day of either Party, then the
            payment shall be due on the next following Business Day.

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2001
                  Western Systems Power Pool
Issued on:  May 2, 2001
<PAGE>
Western Systems Power Pool                              Original Sheet No. 20A
Rate Schedule FERC No. 6

      9.3   Amounts not paid on or before the due date shall be payable with
            interest accrued at the rate of one percent (1%) per month, or the
            maximum interest rate permitted

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2001
                  Western Systems Power Pool
Issued on:  May 2, 2001
<PAGE>
Western Systems Power Pool                          First Revised Sheet No. 21
Rate Schedule FERC No. 6                     Superseding Original Sheet No. 21

            by law, if any, whichever is less, prorated by days from the due
            date to the date of payment unless and until the Executive Committee
            shall determine another rate.

      9.4   In case any portion of any bill is in dispute, the entire bill shall
            be paid when due. Any excess amount of bills which, through
            inadvertent errors or as a result of a dispute, may have been
            overpaid shall be returned by the owing Party upon determination of
            the correct amount, with interest accrued at the rate of one percent
            (1%) per month, or the maximum interest rate permitted by law, if
            any, whichever is less, prorated by days from the date of
            overpayment to the date of refund unless and until the Executive
            Committee shall determine another rate. The Parties shall have no
            rights to dispute the accuracy of any bill or payment after a period
            of two (2) years from the date on which the first bill was delivered
            for a specific transaction.

      9.5   If a Party's records reveal that a bill was not delivered for a
            specific transaction, then the Party may deliver to the appropriate
            Party a bill within two (2) years from the date on which the bill
            would have been delivered under Section 9.1 of this Agreement. The
            right to payment is waived with respect to transactions, or portions
            thereof, not billed within such two (2) year period.

      9.6   Each Party, or any third party representative of a Party, shall keep
            complete and accurate records, and shall maintain such data as may
            be necessary for the purpose of ascertaining the accuracy of all
            relevant data, estimates, or statements

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2001
                  Western Systems Power Pool
Issued on:  May 2, 2001
<PAGE>
Western Systems Power Pool                              Original Sheet No. 21A
Rate Schedule FERC No. 6

            of charges submitted hereunder for a period of two (2) years from
            the date the first bill was delivered for a specific transaction
            completed under this Agreement.

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2001
                  Western Systems Power Pool
Issued on:  May 2, 2001
<PAGE>
Western Systems Power Pool                          First Revised Sheet No. 22
Rate Schedule FERC No. 6                     Superseding Original Sheet No. 22

            Within a two (2) year period from the date the first bill was
            delivered under this Agreement, any Party to that transaction may
            request in writing copies of the records of the other Party for that
            transaction to the extent reasonably necessary to verify the
            accuracy of any statement or charge. The Party from which documents
            or data has been requested shall cooperate in providing the
            documents and data within a reasonable time period.

10.   UNCONTROLLABLE FORCES:

            No Party shall be considered to be in breach of this Agreement or
      any applicable Confirmation Agreement to the extent that a failure to
      perform its obligations under this Agreement or any such Confirmation
      Agreement shall be due to an Uncontrollable Force. The term
      "Uncontrollable Force" means an event or circumstance which prevents one
      Party from performing its obligations under one or more transactions,
      which event or circumstance is not within the reasonable control of, or
      the result of the negligence of the claiming Party, and which by the
      exercise of due diligence, the claiming Party is unable to avoid, cause to
      be avoided, or overcome. "Uncontrollable Forces" may include and are not
      restricted to flood, drought, earthquake, storm, fire, lightning,
      epidemic, war, riot, civil disturbance or disobedience, labor dispute,
      labor or material shortage, sabotage, restraint by court order or public
      authority, and action or nonaction by, or failure to obtain the necessary
      authorizations or approvals from, any governmental agency or authority.

Issued by:  Michael E. Small, General Counsel to   Effective: February 1, 2001
                  Western Systems Power Pool
Issued on:  December 1, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                              Original Sheet No. 22A
Rate Schedule FERC No. 6

      The following shall not be considered "Uncontrollable Forces": (i) the
      price of electricity faced by Seller; or (ii) Purchaser's inability due to
      price to use or resell the power purchased hereunder. No Party shall,
      however, be relieved of liability for failure of performance to the extent
      that such failure is due to causes arising out of its own negligence or
      due to removable or remediable causes which it fails to remove or remedy
      within a reasonable time period. Nothing contained herein shall be
      construed to require a

Issued by:  Michael E. Small, General Counsel to   Effective: February 1, 2001
                  Western Systems Power Pool
Issued on:  December 1, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                          First Revised Sheet No. 23
Rate Schedule FERC No. 6                     Superseding Original Sheet No. 23

      Party to settle any strike or labor dispute in which it may be involved.
      Any Party rendered unable to fulfill any of its obligations by reason of
      an Uncontrollable Force shall give prompt notice of such fact and shall
      exercise due diligence, as provided above, to remove such inability within
      a reasonable time period. If oral notice is provided, it shall be promptly
      followed by written notice.

            Notwithstanding the "due diligence" obligations or obligations to
      remove or remedy the causes set forth in the foregoing paragraph (which do
      not apply to this paragraph except as specified below), where the entity
      providing transmission services for transactions under any Service
      Schedule interrupts such transmission service, the interruption in
      transmission service shall be considered an Uncontrollable Force under
      this Section 10 only in the following two sets of circumstances: (1) An
      interruption in transmission service shall be considered an

            Uncontrollable Force if (a) the Parties agreed on a transmission
            path for that transaction at the time the transaction under this
            Agreement was entered into by the Parties' thereto, (b) firm
            transmission involving that transmission path was obtained pursuant
            to a transmission tariff or contract to effectuate the transaction
            under the applicable Service Schedule, and (c) the entity providing
            transmission service curtailed or interrupted such firm transmission
            pursuant to the applicable transmission tariff or contract;

      (2)   if the Parties did not agree on the transmission path for a
            transaction at the time the transaction was entered into, an
            interruption in transmission service shall be

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 24
Rate Schedule FERC No. 6

            considered an Uncontrollable Force only if (a) the Party contracting
            for transmission services shall have made arrangements with the
            entity providing transmission service for firm transmission to
            effectuate the transaction under the applicable Service Schedule,
            (b) the entity providing transmission service curtailed or
            interrupted such transmission service due to an event of
            Uncontrollable Forces or provision of like effect, and (c) the Party
            which contracted for such firm transmission services could not
            obtain alternate energy at the delivery point, alternate
            transmission services, or alternate means of delivering energy after
            exercising due diligence.

            No Party shall be relieved by operation of this Section 10 of any
      liability to pay for power delivered to the Purchaser or to make payments
      then due or which the Party is obligated to make with respect to
      performance which occurred prior to the Uncontrollable Force.

11.   WAIVERS:

            Any waiver at any time by any Party of its rights with respect to a
      default under this Agreement or any Confirmation Agreements, or any other
      matter under this Agreement, shall not be deemed a waiver with respect to
      any subsequent default of the same or any other matter.

12.   NOTICES:

      12.1  Except for the oral notice provided for in Section 10 of this
            Agreement, any formal notice, demand or request provided for in this
            Agreement shall be in

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                          First Revised Sheet No. 25
Rate Schedule FERC No. 6                     Superseding Original Sheet No. 25

            writing and shall be deemed properly served, given or made if
            delivered in person, or sent by either registered or certified mail
            (postage prepaid), prepaid telegram, fax, overnight delivery (with
            record of receipt), or other means agreed to by the Parties.

      12.2  RESERVED

      12.3  Notices and requests of a routine nature applicable to delivery or
            receipt of power or energy or operation of facilities shall be given
            in such manner as the committees from time to time or the Parties to
            a transaction shall prescribe.

13.   APPROVALS:

      13.1  This Agreement is subject to valid laws, orders, rules and
            regulations of duly constituted authorities having jurisdiction.
            Nothing contained in this Agreement shall give FERC jurisdiction
            over those Parties not otherwise subject to such jurisdiction or be
            construed as a grant of jurisdiction over any Party by any state or
            federal agency not otherwise having jurisdiction by law.

      13.2  This Agreement, including any Service Schedule hereto, shall become
            effective as to any Party when it is accepted for filing by FERC,
            without changes or conditions unacceptable to such Party, for
            application to the Parties subject to FERC jurisdiction under the
            Federal Power Act; provided, however, that nothing in this Agreement
            is intended to restrict the authority of the Bonneville Power
            Administration (BPA) pursuant to applicable statutory authority to
            use its existing

Issued by:  Michael E. Small, General Counsel to Effective:  September 1, 2002
                  Western Systems Power Pool
Issued on:  July 2, 2002
<PAGE>
Western Systems Power Pool                              Original Sheet No. 25A
Rate Schedule FERC No. 6

            wholesale power and transmission rates or to adopt new rates, rate
            schedules, or general rate schedule provisions for application under
            this Agreement and obtain

Issued by:  Michael E. Small, General Counsel to Effective:  September 1, 2002
                  Western Systems Power Pool
Issued on:  July 2, 2002
<PAGE>
Western Systems Power Pool                               Original Sheet No. 26
Rate Schedule FERC No. 6

            interim or final approval of those rates from FERC pursuant to
            Section 7 of the Pacific Northwest Electric Power Planning and
            Conservation Act, 16 U.S.C. Sec. 839e, provided such rates do not
            exceed the maximum rates in the applicable Service Schedule and are
            consistent with the terms and conditions of said Service Schedule.
            If, upon filing of this Agreement by Parties subject to FERC
            jurisdiction under the Federal Power Act, FERC orders a hearing to
            determine whether this Agreement or a Service Schedule under this
            Agreement is just and reasonable under the Federal Power Act, the
            Agreement or Service Schedule shall not become effective until the
            date when an order issued by FERC, determining this Agreement or the
            Service Schedule to be just and reasonable without changes or new
            conditions unacceptable to the Parties, is no longer subject to
            judicial review. Any changes or conditions imposed by any agency or
            court, including FERC ordering a hearing, shall be cause for
            immediate withdrawal by any nonconsenting Party.

      13.3  The Parties subject to FERC jurisdiction under the Federal Power Act
            shall have the right to terminate their participation in this
            Agreement, and any rate schedule or services included herein,
            pursuant to the terms of Section 5 of this Agreement and without the
            necessity of further filing with or approval by FERC.

      13.4  Any amendment or change in maximum rates specified in the Service
            Schedules shall not become effective with regard to any Party that
            is subject to FERC jurisdiction under the Federal Power Act until it
            is accepted for filing or

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                          First Revised Sheet No. 27
Rate Schedule FERC No. 6                     Superseding Original Sheet No. 27

            confirmed and approved by FERC as specified in and subject to the
            conditions of Section 13.2.

      13.5  Nothing contained in this Agreement shall be construed to establish
            any precedent for any other agreement or to grant any rights to or
            impose any obligations on any Party beyond the scope and term of
            this Agreement.

14.   TRANSFER OF INTEREST IN AGREEMENT:

            No Party shall voluntarily transfer its membership under this
      Agreement without the written consent and approval of all other Parties
      except to a Successor in Operation of such Party. With regard to the
      transfer of the rights and obligations of any Party associated with
      transactions under the Service Schedules, neither Party may assign such
      rights or obligations unless (a) the other Party provides its prior
      written consent which shall not be unreasonably withheld; or (b) the
      assignment is to a Successor in Operation which provides reasonable
      creditworthiness assurances (see Section 27 for examples of such
      assurances) if required by the non-assigning Party based upon its
      reasonably exercised discretion. Any successor or assignee of the rights
      of any Party, whether by voluntary transfer, judicial or foreclosure sale
      or otherwise, shall be subject to all the provisions and conditions of
      this Agreement and Confirmation Agreements (where applicable) to the same
      extent as though such successor or assignee were the original Party under
      this Agreement or the Confirmation Agreements, and no assignment or
      transfer of any rights under this Agreement or any Confirmation

Issued by:  Michael E. Small, General Counsel to Effective:  September 1, 2002
                  Western Systems Power Pool
Issued on:  July 2, 2002
<PAGE>
Western Systems Power Pool                              Original Sheet No. 27A
Rate Schedule FERC No. 6

      Agreement shall be effective unless and until the assignee or transferee
      agrees in writing to assume all of the obligations of the assignor or
      transferor and to be bound by all of the provisions and

Issued by:  Michael E. Small, General Counsel to Effective:  September 1, 2002
                  Western Systems Power Pool
Issued on:  July 2, 2002
<PAGE>
Western Systems Power Pool                          First Revised Sheet No. 28
Rate Schedule FERC No. 6                     Superseding Original Sheet No. 28

      conditions of this Agreement and any Confirmation Agreement (where
      applicable). The execution of a mortgage or trust deed or a judicial or
      foreclosure sale made thereunder shall not be deemed a voluntary transfer
      within the meaning of this Section 14.

15.   SEVERABILITY:

            In the event that any of the terms, covenants or conditions of this
      Agreement or any Confirmation Agreement, or the application of any such
      term, covenant or condition, shall be held invalid as to any person or
      circumstance by any court, regulatory agency, or other regulatory body
      having jurisdiction, all other terms, covenants or conditions of this
      Agreement and the Confirmation Agreement and their application shall not
      be affected thereby, but shall remain in force and effect unless a court,
      regulatory agency, or other regulatory body holds that the provisions are
      not separable from all other provisions of this Agreement or such
      Confirmation Agreement.

16.   MEMBERSHIP:

      16.1  Any Electric Utility, Retail Entity or Qualifying Facility may
            become a Party to this Agreement. The Executive Committee shall
            notify such Electric Utility, Retail Entity or Qualifying Facility
            of its decision within sixty (60) days of a request to become a
            Party to this Agreement, and any acceptable entity shall become a
            Party hereto by the execution of this Agreement or a counterpart
            hereof, payment of costs pursuant to Section 16.4, and concluding
            any necessary acceptance or approval referred to in Section 13. Any
            such Party, if it is subject to the ratemaking jurisdiction of FERC,

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2001
                  Western Systems Power Pool
Issued on:  May 2, 2001
<PAGE>
Western Systems Power Pool                               Original Sheet No. 29
Rate Schedule FERC No. 6

            shall be responsible for any FERC filing necessary for it to
            implement its performance under this Agreement.

      16.2  Each Party shall continue to meet the requirements of Section 16.1
            in order to remain a Party to this Agreement

      16.3  Being a Party to this Agreement shall not serve as a substitute for
            contractual arrangements that may be needed between any Party which
            operates a Control Area and any other Party which operates within
            that Control Area.

      16.4  Any entity that becomes a Party to this Agreement which was not a
            party to the experimental Western Systems Power Pool Agreement shall
            pay a one time fee of $25,000 under this Agreement in recognition of
            prior efforts and costs incurred by the parties to the experimental
            Western Systems Power Pool Agreement, which efforts greatly
            facilitated development of this Agreement. Such fee shall be
            credited to future costs of the Operating Agent incurred hereunder.

17.   RELATIONSHIP OF PARTIES:

      17.1  Nothing contained herein or in any Confirmation Agreement shall be
            construed to create an association, joint venture, trust, or
            partnership, or impose a trust or partnership covenant, obligation,
            or liability on or with regard to any one or more of the Parties.
            Each Party shall be individually responsible for its own covenants,
            obligations, and liabilities under this Agreement and under any
            applicable Confirmation Agreement.

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                         Second Revised Sheet No. 30
Rate Schedule FERC No. 6                Superseding First Revised Sheet No. 30

      17.2  All rights of the Parties are several, not joint. No Party shall be
            under the control of or shall be deemed to control another Party.
            Except as expressly provided in this Agreement, no Party shall have
            a right or power to bind another Party without its express written
            consent.

18.   NO DEDICATION OF FACILITIES:

            Any undertaking by one Party to another Party under any provision of
      this Agreement shall not constitute the dedication of the electric system
      or any portion thereof of the undertaking Party to the public or to the
      other Party, and it is understood and agreed that any such undertaking
      under any provision of this Agreement by a Party shall cease upon the
      termination of such Party's obligations under this Agreement.

19.   NO RETAIL SERVICES:

            Nothing contained in this Agreement shall grant any rights to or
      obligate any Party to provide any services hereunder directly to or for
      retail customers of any Party.

20.   THIRD PARTY BENEFICIARIES:

            This Agreement shall not be construed to create rights, in, or to
      grant remedies to, any third party as a beneficiary of this Agreement or
      of any duty, obligation or undertaking established herein except as
      provided for in Section 14.

21.   LIABILITY AND DAMAGES:

      21.1a This Agreement contains express remedies or measures of damages in
            Sections 21.3 and 22 for non-performance or default.

Issued by:  Michael E. Small, General Counsel to Effective:  September 1, 2002
                  Western Systems Power Pool
Issued on:  July 2, 2002
<PAGE>
Western Systems Power Pool                         First Revised Sheet No. 30A
Rate Schedule FERC No. 6                    Superseding Original Sheet No. 30A

            ALL OTHER DAMAGES OR REMEDIES ARE HEREBY WAIVED. Therefore, except
            as provided in Sections 21.3 and 22, no Party or its directors,
            members of its governing bodies, officers or employees shall be
            liable to any other Party or Parties for any loss or damage to
            property, loss of earnings.

      21.1b Notwithstanding any other provision in this Agreement, any Party due
            monies under this Agreement, the amounts of which are not in dispute
            or if disputed have been the subject of a decision awarding such
            amounts, (i) shall have the right to seek payment of such monies in
            any forum having competent jurisdiction and (ii) shall possess the
            right to seek relief directly from that forum without first
            utilizing the mediation or arbitration provisions of this Agreement.

Issued by:  Michael E. Small, General Counsel to Effective:  September 1, 2002
                  Western Systems Power Pool
Issued on:  July 2, 2002
<PAGE>
Western Systems Power Pool                               Original Sheet No. 31
Rate Schedule FERC No. 6

            or revenues, personal injury, or any other direct, indirect, or
            consequential damages or injury, or punitive damages, which may
            occur or result from the performance or non-performance of this
            Agreement (including any applicable Confirmation Agreement),
            including any negligence arising hereunder. Any liability or damages
            faced by an officer or employee of a Federal agency or by that
            agency that would result from the operation of this provision shall
            not be inconsistent with Federal law.

      21.2  [RESERVED]

      21.3  The following damages provision shall apply to transactions under
            Service Schedules B and C. For transactions under Service Schedule
            A, this damages provision or some other damages provision will apply
            only if such a damages provision is agreed to through a Confirmation
            Agreement. The damages under this Section 21.3 apply to a Party's
            failure to deliver or receive electric power or energy in violation
            of the terms of the Agreement and any Confirmation Agreement. The
            Contract Quantity and Contract Price referred to in this Section
            21.3 are part of the agreement between the Parties for which damages
            are being calculated under this Section.

            (a)   If either Party fails to deliver or receive, as the case may
                  be, the quantities of electric power or energy due under the
                  Agreement and any Confirmation Agreement (thereby becoming a
                  "Non-Performing Party" for the purposes of this Section 21.3),
                  the other party (the "Performing

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 32
Rate Schedule FERC No. 6

                  Party") shall be entitled to receive from the Non-Performing
                  Party an amount calculated as follows (unless performance is
                  excused by Uncontrollable Forces as provided in Section 10,
                  the applicable Service Schedule, or by the Performing Party):

                  (1)   If the amount the Purchaser scheduled or received in any
                        hour is less than the applicable hourly Contract
                        Quantity, then the Purchaser shall be liable for (a) the
                        product of the amount (whether positive or negative), if
                        any, by which the Contract Price differed from the Sales
                        Price (Contract Price - Sales Price) and the amount by
                        which the quantity received by the Purchaser was less
                        than the hourly Contract Quantity; plus (b) the amount
                        of transmission charge(s), if any, for firm transmission
                        service upstream of the delivery point, which the Seller
                        incurred to achieve the Sales Price, less the reduction,
                        if any, in transmission charge(s) achieved as a result
                        of the reduction in the Purchaser's schedule or receipt
                        of electric energy (based on Seller's reasonable
                        commercial efforts to achieve such reduction). If the
                        total amounts for all hours calculated under this
                        paragraph (1) are negative, then neither the Purchaser
                        nor the Seller shall pay any amount under this Section
                        21.3(a)(1).

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 33
Rate Schedule FERC No. 6

                  (2)   If the amount the Seller scheduled or delivered in any
                        hour is less than the applicable hourly Contract
                        Quantity, then the Seller shall be liable for (a) the
                        product of the amount (whether positive or negative), if
                        any, by which the Replacement Price differed from the
                        Contract Price (Replacement Price - Contract Price) and
                        the amount by which the quantity delivered by the Seller
                        was less than the hourly Contract Quantity; plus (b) the
                        amount of transmission charge(s), if any, for firm
                        transmission service downstream of the delivery point,
                        which the Purchaser incurred to achieve the Replacement
                        Price, less the reduction, if any, in transmission
                        charge(s) achieved as a result of the reduction in the
                        Seller's schedule or delivery (based on Purchaser's
                        reasonable commercial effort to achieve such reduction).
                        If the total amounts for all hours calculated under this
                        paragraph (2) are negative, then neither the Purchaser
                        nor the Seller shall pay any amount under this Section
                        21.3(a)(2).

                  (3)   The Non-Performing Party shall pay any amount due from
                        it under this section within the billing period as
                        specified in Section 9 of this Agreement or agreed to in
                        the applicable Confirmation Agreement if the Parties
                        agreed to revise the billing period in Section 9.

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 34
Rate Schedule FERC No. 6

            (b)   The Parties agree that the amounts recoverable under this
                  Section 21.3 are a reasonable estimate of loss and not a
                  penalty, and represent the sole and exclusive remedy for the
                  Performing Party. Such amounts are payable for the loss of
                  bargain and the loss of protection against future risks.

            (c)   Each Party agrees that it has a duty to mitigate damages in a
                  commercially reasonable manner to minimize any damages it may
                  incur as a result of the other Party's performance or
                  non-performance of this Agreement.

            (d)   In the event the Non-Performing Party disputes the
                  calculation of the damages under this Section 21.3, the
                  Non-Performing Party shall pay the full amount of the
                  damages as required by Section 9 of this Agreement to the
                  Performing Party.  After informal dispute resolution as
                  required by Section 34.1, any remaining dispute involving
                  the calculation of the damages shall be referred to binding
                  dispute resolution as provided by Section 34.2 of this
                  Agreement.  If resolution or agreement results in refunds
                  or the need for refunds to the Non-Performing Party, such
                  refunds shall be calculated in accordance with Section 9.4
                  of this Agreement.

22.   DEFAULT OF TRANSACTIONS UNDER THIS AGREEMENT AND CONFIRMATION
      AGREEMENTS:

      22.1  EVENTS OF DEFAULT

            An "Event of Default" shall mean with respect to a Party
            ("Defaulting Party"):

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                          First Revised Sheet No. 35
Rate Schedule FERC No. 6                     Superseding Original Sheet No. 35

            (a)   the failure by the Defaulting Party to make, when due, any
                  payment required pursuant to this Agreement or Confirmation
                  Agreement if such failure is not remedied within two (2)
                  Business Days after written notice of such failure is given
                  to the Defaulting Party by the other Party ("the
                  Non-Defaulting Party").  The Non-Defaulting Party shall
                  provide the notice by facsimile to the designated contact
                  person for the Defaulting Party and also shall send the
                  notice by overnight delivery to such contact person; or

            (b)   the failure by the Defaulting Party to provide clear and good
                  title as required by Section 33.3, or to have made accurate
                  representations and warranties as required by Section 37 and
                  such failure is not cured within five (5) Business Days after
                  written notice thereof to the Defaulting Party; or

            (c)   The institution, with respect to the Defaulting Party, by the
                  Defaulting Party or by another person or entity of a
                  bankruptcy, reorganization, moratorium, liquidation or similar
                  insolvency proceeding or other relief under any bankruptcy or
                  insolvency law affecting creditor's rights or a petition is
                  presented or instituted for its winding-up or liquidation; or

            (d)   The failure by the Defaulting Party to provide adequate
                  assurances of its ability to perform all of its outstanding
                  material obligations to the Non-Defaulting Party under the
                  Agreement or Confirmation Agreement

Issued by:  Michael E. Small, General Counsel to  Effective:  February 1, 2001
                  Western Systems Power Pool
Issued on:  December 1, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                         Second Revised Sheet No. 36
Rate Schedule FERC No. 6                Superseding First Revised Sheet No. 36

                  pursuant to Section 27 of this Agreement or any substitute or
                  modified provision in the Confirmation Agreement.

            (e)   With respect to its Guarantor, if any:

                  (i)   if a material representation or warranty made by a
                        Guarantor in connection with this Agreement, or any
                        transaction entered into hereunder, is false or
                        misleading in any material respect when made or when
                        deemed made or repeated; or

                  (ii)  the failure of a Guarantor to make any payment required
                        or to perform any other material covenant or obligation
                        in any guarantee made in connection with this Agreement,
                        including any transaction entered into hereunder, and
                        such failure shall not be remedied within three (3)
                        Business Days after written notice; or

                  (iii) the institution, with respect to the Guarantor, by the
                        Guarantor or by another person or entity of a
                        bankruptcy, reorganization, moratorium, liquidation or
                        similar insolvency proceeding or other relief under any
                        bankruptcy or insolvency law affecting creditor's rights
                        or a petition is presented or instituted for its
                        winding-up or liquidation; or

                  (iv)  the failure, without written consent of the other Party,
                        of a Guarantor's guarantee to be in full force and
                        effect for purposes of this Agreement (other than in
                        accordance with its terms) prior to
<PAGE>
Western Systems Power Pool                         First Revised Sheet No. 36A
Rate Schedule FERC No. 6                    Superseding Original Sheet No. 36A

                        the satisfaction of all obligations of such Party
                        under each transaction to which such guarantee shall
                        relate; or

                  (v)   a Guarantor shall repudiate, disaffirm, disclaim, or
                        reject, in whole or in part, or challenge the validity
                        of, any guarantee.

      22.2  REMEDIES FOR EVENTS OF DEFAULT

                  If an Event of Default occurs, the Non-Defaulting Party shall
            possess the right to terminate all transactions between the Parties
            under this Agreement upon written notice (by facsimile or other
            reasonable means) to the Defaulting Party, such notice of
            termination to be effective immediately upon receipt. If the
            Non-Defaulting Party fails to exercise this right of termination
            within thirty (30) days following the time when the Event of Default
            becomes known (or more than thirty days if the Non-Defaulting and
            Defaulting Parties agree to an extension), then such right of
            termination shall no longer be available to the Non-Defaulting Party
            as a remedy for the Event(s) of Default. The Non-Defaulting Party
            terminating transaction(s) under this Section 22.2 may do so without
            making a filing at FERC.

                  Upon termination, the Non-Defaulting Party shall liquidate all
            transactions as soon as practicable, provided that in no event will
            the Non-Defaulting Party be allowed to liquidate Service Schedule A
            transactions. The payment associated with termination ("Termination
            Payment") shall be calculated in accordance with this Section 22.2
            and Section 22.3. The Termination Payment shall be the sole and
            exclusive remedy for the Non-Defaulting Party for each terminated

Issued by:  Michael E. Small, General Counsel to Effective:  September 1, 2002
                  Western Systems Power Pool
Issued on:  July 2, 2002
<PAGE>
Western Systems Power Pool                              Original Sheet No. 36B
Rate Schedule FERC No. 6

            transaction ("Terminated Transaction") for the time period
            beginning at the time notice of termination under this Section 22
            is received.  Prior to receipt

Issued by:  Michael E. Small, General Counsel to Effective:  September 1, 2002
                  Western Systems Power Pool
Issued on:  July 2, 2002
<PAGE>
Western Systems Power Pool                               Original Sheet No. 37
Rate Schedule FERC No. 6

            of such notice of termination by the Defaulting Party, the
            Non-Defaulting Party may exercise any remedies available to it under
            Section 21.3 of this Agreement or Confirmation Agreement(s), and any
            other remedies available to it at law or otherwise.

                  Upon termination, the Non-Defaulting Party may withhold any
            payments it owes the Defaulting Party for any obligations incurred
            prior to termination under this Agreement or Confirmation
            Agreement(s) until the Defaulting Party pays the Termination Payment
            to the Non-Defaulting Party. The Non-Defaulting Party shall possess
            the right to set-off the amount due it under this Section 22 by any
            such payments due the Defaulting Party as provided in Section
            22.3(d).

      22.3  LIQUIDATION CALCULATION OPTIONS

                  The Non-Defaulting Party shall calculate the Termination
            Payment as follows:

            (a)   The Gains and Losses shall be determined by comparing the
                  value of the remaining term, transaction quantities, and
                  transaction prices under each Terminated Transaction had it
                  not been terminated to the equivalent quantities and relevant
                  market prices for the remaining term either quoted by a bona
                  fide third-party offer or which are reasonably expected to be
                  available in the market under a replacement contract for each
                  Terminated Transaction. To ascertain the market prices of a
                  replacement contract, the Non-Defaulting Party may consider,
                  among other valuations, quotations

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                          First Revised Sheet No. 38
Rate Schedule FERC No. 6                     Superseding Original Sheet No. 38

                  from Dealers in energy contracts, any or all of the settlement
                  prices of the NYMEX power futures contracts (or NYMEX power
                  options contracts in the case of Physically-Settled Options)
                  and other bona fide third party offers, all adjusted for the
                  length of the remaining term and differences in transmission.
                  It is expressly agreed that the Non-Defaulting Party shall not
                  be required to enter into replacement transactions in order to
                  determine the Termination Payment.

            (b)   The Gains and Losses calculated under paragraph (a) shall
                  be discounted to present value using the Present Value Rate
                  as of the time of termination (to take account to the
                  period between the time notice of termination was effective
                  and when such amount would have otherwise been due pursuant
                  to the relevant transaction).  The "Present Value Rate"
                  shall mean the sum of 0.50% plus the yield reported on page
                  "USD" of the Bloomberg Financial Markets Services Screen
                  (or, if not available, any other nationally recognized
                  trading screen reporting on-line intraday trading in United
                  States government securities) at 11:00 a.m. (New York City,
                  New York time) for the United States government securities
                  having a maturity that matches the average remaining term
                  of the Terminated Transactions; and

            (c)   The Non-Defaulting Party shall set off or aggregate, as
                  appropriate, the Gains and Losses (as calculated in Section
                  22.3(a)) and Costs and notify

Issued by:  Michael E. Small, General Counsel to Effective:  September 1, 2002
                  Western Systems Power Pool
Issued on:  July 2, 2002
<PAGE>
Western Systems Power Pool                               Original Sheet No. 39
Rate Schedule FERC No. 6

                  the Defaulting Party. If the Non-Defaulting Party's aggregate
                  Losses and Costs exceed its aggregate Gains, the Defaulting
                  Party shall, within three (3) Business Days of receipt of such
                  notice, pay the Termination Payment to the Non-Defaulting
                  Party, which amount shall bear interest at the Present Value
                  rate from the time notice of termination was received until
                  paid. If the Non-Defaulting Party's aggregate Gains exceed its
                  aggregate Losses and Costs, the Non-Defaulting Party, after
                  any set-off as provided in paragraph (d), shall pay the
                  remaining amount to the Defaulting Party within three (3)
                  Business Days of the date notice of termination was received
                  including interest at the Present Value from the time notice
                  of termination was received until the Defaulting Party
                  receives payment.

            (d)   The Non-Defaulting Party shall aggregate or set off, as
                  appropriate, at its election, any or all other amounts
                  owing between the Parties (discounted at the Present Value
                  Rate) under this Agreement and any Confirmation Agreements
                  against the  Termination Payment so that all such amounts
                  are aggregated and/or netted to a single liquidated
                  amount.  The net amount due from any such liquidation shall
                  be paid within three (3) Business Days following the date
                  notice of termination is received.

             If the Defaulting Party disagrees with the calculation of the
      Termination Payment and the Parties cannot otherwise resolve their
      differences, the calculation issue shall be submitted to informal dispute
      resolution as provided in Section 34.1

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                          First Revised Sheet No. 40
Rate Schedule FERC No. 6                     Superseding Original Sheet No. 40

            of this Agreement and thereafter binding dispute resolution pursuant
            to Section 34.2 if the informal dispute resolution does not succeed
            in resolving the dispute. Pending resolution of the dispute, the
            Defaulting Party shall pay the full amount of the Termination
            Payment calculated by the Non-Defaulting Party within three (3)
            Business Days of receipt of notice as set forth in Sections 22.3(c)
            and (d) subject to the Non-Defaulting Party refunding, with
            interest, pursuant to Section 9.4, any amounts determined to have
            been overpaid.

                  For purposes of this Section 22.3:

            (i)   "Gains" means the economic benefit (exclusive of Costs), if
                  any, resulting from the termination of the Terminated
                  Transactions, determined in a commercially reasonable manner
                  as calculated in accordance with this Section 22.3;

            (ii)  "Losses" means the economic loss (exclusive of Costs), if any,
                  resulting from the termination of the Terminated Transactions,
                  determined in a commercially reasonable manner as calculated
                  in accordance with this Section 22.3;

            (iii) "Costs" means brokerage fees, commissions and other similar
                  transaction costs and expenses reasonably incurred in
                  terminating any specifically related arrangements which
                  replace a Terminated Transaction, transmission and ancillary
                  service costs associated with Terminated Transactions, and
                  reasonable attorneys' fees, if any, incurred in connection

Issued by:  Michael E. Small, General Counsel to Effective:  September 1, 2002
                  Western Systems Power Pool
Issued on:  July 2, 2002
<PAGE>
Western Systems Power Pool                               Original Sheet No. 41
Rate Schedule FERC No. 6

                  with the Non-Defaulting Party enforcing its rights with regard
                  to the Terminated Transactions. The Non-Defaulting Party shall
                  use reasonable efforts to mitigate or eliminate these Costs.

            (iv)  In no event, however, shall a Party's Gains, Losses or Costs
                  include any penalties or similar charges imposed by the
                  Non-Defaulting Party.

      22A.  DEFAULT IN PAYMENT OF WSPP OPERATING COSTS:

            22A.1 A Party shall be deemed to be in default in payment of its
                  share of WSPP operating costs pursuant to Section 7 of this
                  Agreement, if any, when payment is not received within ten
                  (10) days after receipt of written notice. A default by any
                  Party in such payment obligations shall be cured by payment of
                  all overdue amounts together with interest accrued at the rate
                  of one percent (1%) per month, or the maximum interest rate
                  permitted by law, if any, whichever is less, prorated by days
                  from the due date to the date the payment curing the default
                  is made unless and until the Executive Committee shall
                  determine another rate.

            22A.2 A defaulting Party, which is in default under Section 22.A1,
                  shall be liable for all costs, including costs of collection
                  and reasonable attorney fees, plus interest as provided in
                  Section 22.A1 hereof.

            22A.3 The rights under this Agreement of a Party which is in default
                  of its obligation to pay operating costs under this Agreement
                  for a period of three (3) months or more may be revoked by a
                  vote of the non-defaulting

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 42
Rate Schedule FERC No. 6

                  Parties' representatives on the Executive Committee consistent
                  with Section 8.3. The defaulting Party's rights shall not be
                  revoked, however, unless said Party has received at least
                  thirty (30) days written notice of the non-defaulting Parties'
                  intent to revoke such rights. Said notice shall state the date
                  on which the revocation of rights shall become effective if
                  the default is not cured and shall state all actions which
                  must be taken or amounts which must be paid to cure the
                  default. This provision allowing the non-defaulting Parties to
                  revoke such rights is in addition to any other remedies
                  provided in this Agreement or at law and shall in no way limit
                  the non-defaulting Parties' ability to seek judicial
                  enforcement of the defaulting Party's obligations to pay its
                  share of the operating costs under this Agreement. Upon the
                  effective date of such revocation of rights, the defaulting
                  party shall not be allowed to enter into any new transactions
                  under this Agreement. The defaulting party under the Agreement
                  or any Confirmation Agreements shall be required to carry out
                  all obligations that existed prior to the effective date of
                  such revocation. If a defaulting Party's rights under this
                  Agreement have been revoked, the Executive Committee may
                  restore that Party's rights upon the defaulting Party paying
                  all amounts due and owing under this Agreement.

            22A.4 Upon revocation of the rights of a defaulting Party under this
                  Agreement, Operating Agent costs hereunder shall be equally
                  shared among the

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                          First Revised Sheet No. 43
Rate Schedule FERC No. 6                     Superseding Original Sheet No. 43

                  remaining Parties.  Cost allocation adjustments shall be
                  retroactive to the date of the default.

23.   OTHER AGREEMENTS:

            No provision of this Agreement shall preclude any Party from
      entering into other agreements or conducting transactions under existing
      agreements with other Parties or third parties. This Agreement shall not
      be deemed to modify or change any rights or obligations under any prior
      contracts or agreements between or among any of the Parties.

24.   GOVERNING LAW:

            This Agreement and any Confirmation Agreement shall be governed by
      and construed in accordance with the laws of the State of Utah, without
      regard to the conflicts of laws rules thereof. The foregoing
      notwithstanding, (1) if both the Seller and Purchaser are organized under
      the laws of Canada, then the laws of the province of the Seller shall
      govern, or (2) if the Seller or Purchaser is an agency of or part of the
      United States Government, then the laws of the United States of America
      shall govern.

25.   JUDGMENTS AND DETERMINATIONS:

            Whenever it is provided in this Agreement that a Party shall be the
      sole judge of whether, to what extent, or under what conditions it will
      provide a given service, its exercise of its judgment shall be final and
      not subject to challenge. Whenever it is provided that (i) a service under
      a given transaction may be curtailed under certain conditions or
      circumstances, the existence of which are determined by or in the judgment
      of a Party, or (ii) the existence of qualifications for membership shall
      be determined by

Issued by:  Michael E. Small, General Counsel to Effective:  September 1, 2002
                  Western Systems Power Pool
Issued on:  July 2, 2002
<PAGE>
Western Systems Power Pool                               Original Sheet No. 44
Rate Schedule FERC No. 6

      the Executive Committee pursuant to Section 16, that Party's or the
      Executive Committee's determination or exercise of judgment shall be final
      and not subject to challenge if it is made in good faith and not made
      arbitrarily or capriciously.

26.   COMPLETE AGREEMENT:

            This Agreement and any subsequent amendments, including the Service
      Schedules and Exhibits incorporated herein, and any Confirmation
      Agreement, shall constitute the full and complete agreement of the Parties
      with respect to the subject matter hereof, and all prior or
      contemporaneous representations, statements, negotiations, understandings
      and inducements are fully merged and incorporated in this Agreement.

27.   CREDITWORTHINESS:

            Should a Party's creditworthiness, financial responsibility, or
      performance viability become unsatisfactory to the other Party in such
      other Party's reasonably exercised discretion with regard to any
      transaction pursuant to this Agreement and any Confirmation Agreement
      (after the transaction is agreed to or begins), the dissatisfied Party
      (the "First Party") may require the other Party (the "Second Party") to
      provide, at the Second Party's option (but subject to the First Party's
      acceptance based upon reasonably exercised discretion), either (1) the
      posting of a Letter of Credit, (2) a cash prepayment, (3) the posting of
      other acceptable collateral or security by the Second Party, (4) a
      Guarantee Agreement executed by a creditworthy entity; or (5) some other
      mutually agreeable method of satisfying the First Party. The Second
      Party's obligations under this Section 27 shall be limited to a reasonable
      estimate of the damages to the First Party

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 45
Rate Schedule FERC No. 6

      (consistent with Section 21.3 of this Agreement) if the Second Party were
      to fail to perform its obligations. Events which may trigger the First
      Party questioning the Second Party's creditworthiness, financial
      responsibility, or performance viability include, but are not limited to,
      the following:

      (1)   The First Party has knowledge that the Second Party (or its
            Guarantor if applicable) are failing to perform or defaulting under
            other contracts.

      (2)   The Second Party has exceeded any credit or trading limit set out in
            the Confirmation Agreement or other agreement between the Parties.

      (3)   The Second Party or its Guarantor has debt which is rated as
            investment grade and that debt falls below the investment grade
            rating by at least one rating agency or is below investment grade
            and the rating of that debt is downgraded further by at least one
            rating agency.

      (4)   Other material adverse changes in the Second Party's financial
            condition occur.

      (5)   Substantial changes in market prices which materially and adversely
            impact the Second Party's ability to perform under this Agreement or
            any Confirmation Agreement occur.

            If the Second Party fails to provide such reasonably satisfactory
      assurances of its ability to perform a transaction hereunder within three
      (3) Business Days of demand therefore, that will be considered an Event of
      Default under Section 22 of this Agreement and the First Party shall have
      the right to exercise any of the remedies provided for under

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                         First Revised  Sheet No. 46
Rate Schedule FERC No. 6                     Superseding Original Sheet No. 46

      that Section 22. Nothing contained in this Section 27 shall affect any
      credit agreement or arrangement, if any, between the Parties.

28.   NETTING:

      28.1  If the Purchaser and the Seller are each required to pay an amount
            to each other in the same calendar month for transactions under this
            Agreement, then such amounts with respect to each Party may be
            aggregated and the Parties may discharge their obligations to pay
            through netting of the respective amounts due, in which case the
            Party, if any, owing the greater aggregate amount may pay to the
            other Party the difference between the amounts owed. Each Party
            reserves to itself all rights, set-offs, counterclaims, and other
            remedies and defenses (to the extent not expressly herein waived or
            denied) which such Party has or may be entitled to arising from or
            out of this Agreement and any applicable Confirmation Agreements.

      28.2  Parties shall net payments (associated with transactions under this
            Agreement and Confirmation Agreement) in accordance with Exhibit A,
            if such Parties have executed the form attached as Exhibit A. The
            Parties obligation to net shall include the netting of all payments
            received by the Parties in the same calendar month. Parties that
            have executed Exhibit A shall provide a signed copy of

Issued by:  Michael E. Small, General Counsel to     Effective:  March 1, 2002
                  Western Systems Power Pool
Issued on:  December 21, 2001
<PAGE>
Western Systems Power Pool                          First Revised Sheet No. 47
Rate Schedule FERC No. 6                     Superseding Original Sheet No. 47

            Exhibit A to a representative of the WSPP and to any Party that
            requests a copy and indicate on the WSPP Homepage that they have so
            executed Exhibit A (once the WSPP Homepage possesses the necessary
            capability). If a Party indicated its election to net payments on
            the WSPP Homepage and that Party desires to withdraw its agreement
            to net, that Party shall provide at least 30 days notice on the WSPP
            Homepage of the change in its election to net and also shall
            provide, concurrent with its withdrawal notice, written notice to
            all Parties with which it has ongoing transactions or with which it
            has committed to future transactions under the Agreement at the time
            of the notice. Any such changes in netting status shall apply
            beginning at least 30 days after notice required by this Section
            28.2 is provided and only shall apply to transactions agreed to
            beginning on or after the date the change in netting status becomes
            effective.

      28.3  The Parties may by separate agreement either through a Confirmation
            Agreement or some other agreement set out specific terms relating to
            the implementation of the netting in addition to or in lieu of
            Exhibit A.

Issued by:  Michael E. Small, General Counsel to     Effective:  March 1, 2002
                  Western Systems Power Pool
Issued on:  December 21, 2001
<PAGE>
Western Systems Power Pool                              Original Sheet No. 47A
Rate Schedule FERC No. 6

29.   TAXES:

            The Contract Price for all transactions under the Service Schedules
      shall include full reimbursement for, and the Seller is liable for and
      shall pay, or cause to be paid, or reimburse the Purchaser for if the
      Purchaser has paid, all taxes applicable to a transaction that arise prior
      to the delivery point. If the Purchaser is required to remit such tax, the
      amount shall be deducted from any sums due to the Seller. The Seller shall
      indemnify,

Issued by:  Michael E. Small, General Counsel to     Effective:  March 1, 2002
                  Western Systems Power Pool
Issued on:  December 21, 2001
<PAGE>
Western Systems Power Pool                               Original Sheet No. 48
Rate Schedule FERC No. 6

      defend, and hold harmless the Purchaser from any claims for such taxes.
      The Contract Price does not include reimbursement for, and the Purchaser
      is liable for and shall pay, cause to be paid, or reimburse the Seller for
      if the Seller has paid, all taxes applicable to a transaction arising at
      and from the delivery point, including any taxes imposed or collected by a
      taxing authority with jurisdiction over the Purchaser. The Purchaser shall
      indemnify, defend, and hold harmless the Seller from any claims for such
      taxes. Either Party, upon written request of the other Party, shall
      provide a certificate of exemption or other reasonably satisfactory
      evidence of exemption if either Party is exempt from taxes, and shall use
      reasonable efforts to obtain and cooperate with the other Party in
      obtaining any exemption from or reduction of any tax. Taxes are any
      amounts imposed by a taxing authority associated with the transaction.

30.   CONFIDENTIALITY:

            The terms of any transaction under the Service Schedules or any
      other information exchanged by the Purchaser and Seller relating to the
      transaction shall not be disclosed to any person not employed or retained
      by the Purchaser or the Seller or their affiliates, except to the extent
      disclosure is (1) required by law, (2) reasonably deemed by the disclosing
      Party to be required to be disclosed in connection with a dispute between
      or among the Parties, or the defense of any litigation or dispute, (3)
      otherwise permitted by consent of the other Party, which consent shall not
      be unreasonably withheld, (4) required to be made in connection with
      regulatory proceedings (including proceedings relating to FERC, the United
      States Securities and Exchange Commission or any other

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 49
Rate Schedule FERC No. 6

      federal, state or provincial regulatory agency); (5) required to comply
      with North American Electric Reliability Organization, regional
      reliability council, or successor organization requirements; or (6)
      necessary to obtain transmission service. In the event disclosure is made
      pursuant to this provision, the Parties shall use reasonable efforts to
      minimize the scope of any disclosure and have the recipients maintain the
      confidentiality of any documents or confidential information covered by
      this provision, including, if appropriate, seeking a protective order or
      similar mechanism in connection with any disclosure. This provision shall
      not apply to any information that was or is hereafter in the public domain
      (except as a result of a breach of this provision).

31.   TRANSMISSION TARIFF:

            Pursuant to FERC Order No. 888, issued on April 24, 1996, and FERC
      orders where applicable, the WSPP Default Transmission Tariff has been
      filed and has become effective. The Parties agree to be bound by the terms
      of that Tariff for so long as they are Western Systems Power Pool members.

32.   TRANSACTION SPECIFIC TERMS AND ORAL AGREEMENTS:

      32.1  The Parties' agreement to transaction specific terms which
            constitute the Confirmation Agreement shall be made by one of the
            following methods: (1) provision of pertinent information through
            written Confirmation Agreements (see Exhibit C for a sample); or (2)
            oral conversation, provided that such oral conversation is recorded
            electronically. By mutual agreement and consistent with and pursuant
            to the provisions of this Section 32, the Parties to a transaction
            under

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                          Third Revised Sheet No. 50
Rate Schedule FERC No. 6               Superseding Second Revised Sheet No. 50

            this Agreement may agree to modify any term of this Agreement which
            applies to such transaction (but not to provisions regarding the
            operation of the WSPP as an organization including Sections 7 and
            8), such agreement to be reflected in a Confirmation Agreement.
            Written confirmation shall be required for all transactions of one
            week or more. Upon request of the Purchaser or at the election of
            the Seller, the Seller shall provide written confirmation which must
            be received by the Purchaser within five Business Days of the date
            of the agreement or request. The Purchaser shall have five Business
            Days from date of receipt to respond to the confirmation. If the
            Purchaser does not respond within that time period, the Seller's
            written confirmation shall be considered as accepted and final
            except as provided in Section 32.5. If the Seller fails to provide
            any required written confirmation within five Business Days, as
            described above, then the Purchaser may submit a written
            confirmation to the Seller. The Purchaser shall submit such written
            confirmation within five Business Days after the deadline for
            submitting a written confirmation applicable to the Seller as set
            forth above has expired. If the Seller fails to respond to
            Purchaser's confirmation within five Business Days, then the
            Purchaser's written confirmation shall be considered as accepted and
            final except as provided in Section 32.5. Notwithstanding the
            foregoing, any failure of the Seller or the Purchaser to provide
            written confirmation of the transaction shall not invalidate any
            oral agreement of the Parties except for oral agreements prohibited
            by Section 32.5. Nor shall any oral agreement of the Parties be
            considered invalidated

Issued by:  Michael E. Small, General Counsel to Effective:  September 1, 2002
                  Western Systems Power Pool
Issued on:  July 2, 2002
<PAGE>
Western Systems Power Pool                        First Revised  Sheet No. 50A
Rate Schedule FERC No. 6                    Superseding Original Sheet No. 50A

            before and during the time period the confirmation process is
            ongoing and no final Confirmation Agreement under these procedures
            or through mutual agreement has been reached.

Issued by:  Michael E. Small, General Counsel to     Effective:  March 1, 2002
                  Western Systems Power Pool
Issued on:  December 21, 2001
<PAGE>
Western Systems Power Pool                               Original Sheet No. 51
Rate Schedule FERC No. 6

      32.2  The Parties agree not to contest, or assert any defense with respect
            to, the validity or enforceability of any agreement to the terms
            concerning a specific transaction(s), on the basis that
            documentation of such terms fails to comply with the requirements of
            any statute that agreements be written or signed. Each Party
            consents to the recording by the other Party, without any further
            notice, of telephone conversations between representatives of the
            Parties, which contain agreements to or discussion concerning the
            terms of a specific transaction(s). All such recordings may be
            introduced and admitted into evidence for the purpose of proving
            agreements to terms, and any objection to such introduction or
            admission for such purpose is hereby expressly waived. The terms
            documented hereunder, whether stated in a written document or a
            recording, are intended by the Parties as a final expression of
            their agreement with respect to such terms as are included therein
            and may not be contradicted by evidence of any prior agreement, but
            may be supplemented by course of dealing, performance, usage of
            trade and evidence of consistent additional mutually agreed-upon
            terms.

      32.3  For individual transactions under the Service Schedules, the
            Agreement as it may be modified or supplemented by a Confirmation
            Agreement shall bind the Parties and govern the transactions;
            provided, however, if the Parties to a transaction do not reach
            agreement on such modification or change to a term of the Agreement,
            or the Confirmation Agreement is not considered accepted and final
            pursuant to Section 32.1, then the term or terms of the Agreement,
            which the Parties could not

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                         Second Revised Sheet No. 52
Rate Schedule FERC No. 6                Superseding First Revised Sheet No. 52

            reach agreement to modify or change or which are not considered
            modified pursuant to Section 32.1, shall apply to that transaction.
            In the event of a conflict between a binding and effective
            Confirmation Agreement and this Agreement, the Confirmation
            Agreement shall govern.

      32.4  The Seller shall not be required to file written confirmations with
            FERC except as provided in the Service Schedules.

      32.5  When a Confirmation Agreement contains Non-Standard Confirmation
            Provisions which are provisions other than those set forth in
            paragraphs (a) - (l) of Exhibit C, those Non-Standard Confirmation
            Provisions shall not be deemed to be accepted pursuant to Section
            32.1 unless agreed to: (i) orally, with that oral agreement recorded
            (provided that such oral agreement option only shall be available
            for transactions of less than one week); or (ii) in a writing
            executed by both Parties.

      32.6  Other Products and Service Levels: The Parties may agree to use a
            product/service level defined by a different agreement (e.g., the
            California ISO tariff, the ERCOT agreement or the EEI agreement) for
            a particular transaction under this Agreement. Unless the Parties
            expressly state and agree that all the terms and conditions of such
            other agreement will apply to any such transaction, the transaction
            shall be subject to all the terms of this Agreement, except that (1)
            all service level/product definitions, (2) force
            majeure/uncontrollable force definitions, and (3) other terms as
            mutually agreed shall have the meaning

Issued by:  Michael E. Small, General Counsel to Effective:  September 1, 2002
                  Western Systems Power Pool
Issued on:  July 2, 2002
<PAGE>
Western Systems Power Pool                              Original Sheet No. 52A
Rate Schedule FERC No. 6

            ascribed to them in the different agreement or in the applicable
            confirmation notice or agreement.

      32.7  Written confirmation pursuant to this Section 32 may be provided in
            electronic format so long as the Parties to the affected transaction
            or transactions have agreed on the procedures and format for doing
            so.

33.   PERFORMANCE, TITLE, AND WARRANTIES FOR TRANSACTIONS UNDER SERVICE
      SCHEDULES:

      33.1  Performance

            33.1.1 The Seller shall deliver to the delivery point(s) as agreed
                   to in the applicable Confirmation Agreement and sell to the
                   Purchaser in accordance with the terms of the Agreement and
                   such Confirmation Agreement.

            33.1.2 The Purchaser shall receive and purchase the Contract
                   Quantity, as agreed to by the Parties in the applicable
                   Confirmation Agreement, at the delivery point(s) and purchase
                   from the Seller in accordance with the terms of the Agreement
                   and such Confirmation Agreement.

      33.2  Title and Risk of Loss

                  Title to and risk of loss of the electric energy shall pass
            from the Seller to the Purchaser at the delivery point agreed to in
            the Confirmation Agreement; provided, however, with regard to
            federal agencies or parts of the United States

Issued by:  Michael E. Small, General Counsel to     Effective:  March 1, 2002
                  Western Systems Power Pool
Issued on:  December 21, 2001
<PAGE>
Western Systems Power Pool                               Original Sheet No. 53
Rate Schedule FERC No. 6

            Government, title to and risk of loss shall pass to Purchaser to the
            extent permitted by and consistent with applicable law.

      33.3  Warranties

                  The Seller warrants that it will transfer to the Purchaser
            good title to the electric energy sold under the Agreement and any
            Confirmation Agreement, free and clear of all liens, claims, and
            encumbrances arising or attaching prior to the delivery point and
            that Seller's sale is in compliance with all applicable laws and
            regulations. THE SELLER HEREBY DISCLAIMS ALL OTHER WARRANTIES,
            EXPRESS OR IMPLIED, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR
            FITNESS FOR A PARTICULAR PURPOSE.

34.   DISPUTE RESOLUTION:

      34.1  INFORMAL DISPUTE RESOLUTION

                  Before binding dispute resolution or any other form of
            litigation may proceed, any dispute between the Parties to a
            transaction under this Agreement first shall be referred to
            nonbinding mediation. The Parties shall attempt to agree upon a
            mediator from a list of ten (10) candidates provided by the Chairman
            of the WSPP Operating Committee or his or her designee. If the
            Parties are unable to agree, then the Chairman or the designee shall
            appoint a mediator for the dispute. Neither the mediator nor the
            person involved on behalf of the WSPP in developing a list of
            mediators for the Parties to choose from or in selecting the

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 54
Rate Schedule FERC No. 6

            mediator (if the Parties are unable to do so) shall possess a direct
            or indirect interest in either Party or the subject matter of the
            mediation. The WSPP shall establish procedures for the appointment
            of mediators and the conduct of mediation and those procedures shall
            apply to the mediation.

      34.2  BINDING DISPUTE RESOLUTION

                  The Parties to a dispute may elect binding dispute resolution
            using the following process unless binding arbitration of certain
            disputes is required under this Agreement in which event the Parties
            shall use the process set forth in this Section 34.2 to resolve such
            disputes, unless the Parties otherwise agree:

            (a)   WSPP Dispute Resolution: A Party to a dispute (if binding
                  dispute resolution is required) or all Parties to a dispute
                  (if agreement of the Parties is required for binding dispute
                  resolution) may initiate binding dispute resolution under WSPP
                  procedures by notifying the Chairman of the WSPP Operating
                  Committee or his or her designee. The Chairman or his or her
                  designee shall provide the Parties with a list of ten (10)
                  eligible arbitrators. Within ten (10) days of receiving the
                  list, the Parties shall agree on a single arbitrator from the
                  list to conduct the arbitration, or notify the Chairman of the
                  Operating Committee or the designee of their inability to
                  reach agreement. If notified of the Parties inability to reach
                  agreement, then the Chairman or the designee shall choose the
                  arbitrator from the list within five (5) days. Neither the
                  arbitrator nor the person

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 55
Rate Schedule FERC No. 6

                  involved on behalf of the WSPP in developing a list of
                  arbitrators for the Parties to choose from or in selecting the
                  arbitrator (if the Parties are unable to do so) shall possess
                  a direct or indirect interest in either Party or the subject
                  matter of the arbitration. The Procedures to be used for this
                  arbitration shall follow the arbitration procedures which
                  shall be developed and maintained by the WSPP and the
                  procedures will be generally consistent with the commercial
                  arbitration rules of the American Arbitration Association
                  though not involving the Association.

                  If the Parties agree to binding dispute resolution under this
            Section 34.2, each Party understands that it will not be able to
            bring a lawsuit concerning any dispute that may arise which is
            covered by this arbitration provision. Notwithstanding the
            foregoing, nothing herein is intended to waive any provision of the
            Federal Arbitration Act, 9 U.S.C. Section 1, et. seq., or anY right
            under state statute or common law to challenge an arbitration award
            or to prevent any action to enforce any arbitration award.

                  A Party's liability and damages under any arbitration award
            resulting from the process set forth in this Section 34.2 shall be
            limited as provided in this Agreement or in any Confirmation
            Agreement.

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 56
Rate Schedule FERC No. 6

            34.3  COSTS

                  Each Party shall be responsible for its own costs and those of
            its counsel and representatives. The Parties shall equally divide
            the costs of the arbitrator or mediator and the hearing.

      34.4  CONFIDENTIALITY

                  Any arbitration or mediation under this Section 34 shall be
            conducted on a confidential basis and not disclosed, including any
            documents or results which shall be considered confidential, unless
            the Parties otherwise agree or such disclosure is required by law.

35.   FORWARD CONTRACTS:

            The Parties acknowledge and agree that all transactions under the
      Agreement and Confirmation Agreement(s) are forward contracts and that the
      Parties are forward contract merchants, as those terms are used in the
      United States Bankruptcy Code. The Parties acknowledge and agree that all
      of their transactions, together with this Agreement and the related
      Confirmation Agreement(s) form a single, integrated agreement, and
      agreements and transactions are entered into in reliance on the fact that
      the agreements and each transaction form a single agreement between the
      Parties.

36.   TRADE OPTION EXCEPTION

            The Parties intend that any Physically Settled Option under this
      Agreement shall qualify under the trade option exception, 17 C.F.R.
      Section 32.4. Accordingly, each Party buying or selling a Physically
      Settled Option agrees and warrants that any such option

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 57
Rate Schedule FERC No. 6

      shall be offered only to a provider, user, or merchant and that the
      entities entering into the options are doing so solely for purposes
      related to their business.

37.   ADDITIONAL REPRESENTATIONS AND WARRANTIES:

            Each Party warrants and represents to the other(s) that it possesses
      the necessary corporate, governmental and legal authority, right and power
      to enter into and agree to the applicable Confirmation Agreement for a
      transaction or transactions and to perform each and every duty imposed,
      and that the Parties' agreement to buy and sell power under this Agreement
      and the Confirmation Agreement represents a contract. Each Party also
      warrants and represents to the other(s) that each of its representatives
      executing or agreeing through a Confirmation Agreement to a transaction
      under this Agreement is authorized to act on its behalf.

            Each Party further warrants and represents that entering into and
      performing this Agreement and any applicable Confirmation Agreement does
      not violate or conflict with its Charter, By-laws or comparable
      constituent document, any law applicable to it, any order or judgment of
      any court or other agency of government applicable to it or any agreement
      to which it is a party and that this Agreement and applicable Confirmation
      Agreement(s), constitute a legal, valid and binding obligation enforceable
      against such Party in accordance with the terms of such agreements.

            Each Party also represents that it is solvent and that on each
      delivery this representation shall be deemed renewed unless notice to the
      contrary is given in writing by the Purchaser to the Seller before
      delivery.

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                          First Revised Sheet No. 58
Rate Schedule FERC No. 6                                  Superseding
Original Sheet No. 58

38.   FLOATING PRICES:

      38.1  In the event the Parties intend that the price for a transaction is
            to be based on an index, exchange or any other kind of variable
            reference price (such price being a "Floating Price"), the Parties
            shall specify the "Floating Price" to be used to calculate the
            amounts in a Confirmation Agreement due Seller for that transaction.

      38.2  Market Disruption. If a Market Disruption Event has occurred and is
            continuing during the Determination Period, the Floating Price for
            the affected Trading Day shall be determined as follows. The Parties
            shall negotiate in good faith to agree on a Floating Price (or a
            method for determining a Floating Price) for the affected Trading
            Day. If the Parties have not so agreed on or before the twelfth
            Business Day following the first Trading Day on which the Market
            Disruption Event occurred or existed, then the Floating Price shall
            be determined in good faith by the Parties based upon (1) quotes
            from Dealers in energy contracts; and/or (2) quotes from Brokers in
            energy contracts. Each Party may obtain up to a maximum of four
            quotes which must be provided to the other Party no later than
            twenty-two Business Days following the first Business Day on which
            the Market Disruption Event occurred or existed. These quotes shall
            reflect transacted prices. The Floating Price for the affected
            Trading Day shall equal a simple average of the quotes obtained and
            provided by the Parties consistent with the provisions of this
            Section 38. Each Party providing quote(s) to the other Party also
            shall

Issued by:  Michael E. Small, General Counsel to     Effective:  March 1, 2002
                  Western Systems Power Pool
Issued on:  December 21, 2001
<PAGE>
Western Systems Power Pool                              Original Sheet No. 58A
Rate Schedule FERC No. 6

            identify to that other Party the Dealer(s) and/or the Broker(s) who
            provided each of the quotes to allow verification. "Determination
            Period" means each calendar month during the term of the relevant
            transaction; provided that if the term of the transaction is less
            than one calendar month the Determination Period shall be the term
            of the transaction. "Market Disruption Event" means, with respect to
            an index, any of the following events (the existence of which shall
            be determined in good faith by the Parties): (a) the failure of the
            index to announce or publish information necessary for determining
            the Floating Price; (b) the failure of trading to commence or the
            permanent discontinuation or material suspension of trading in the
            relevant options contract or commodity on the exchange or market
            acting as the index; (c) the temporary or permanent discontinuance
            or unavailability of the index; (d) the temporary or permanent
            closing of any exchange acting as the index; or (e) a material
            change in the formula for or the method of determining the Floating
            Price.

            "Trading Day" means a day in respect of which the relevant price
            source published the relevant price or would have published the
            relevant price but for the Market Disruption Event.

      38.3  Calculation of Floating Price.  For the purposes of the
            calculation of a Floating Price, all numbers shall be rounded to
            three (3) decimal places.  If the fourth (4th) decimal number is
            five (5) or greater, then the third (3rd) decimal number shall be

Issued by:  Michael E. Small, General Counsel to     Effective:  March 1, 2002
                  Western Systems Power Pool
Issued on:  December 21, 2001
<PAGE>
Western Systems Power Pool                              Original Sheet No. 58B
Rate Schedule FERC No. 6

            increased by one (1), and if the fourth (4th) decimal number is less
            than five (5), then the third (3rd) decimal number shall remain
            unchanged.

39.   AMENDMENT:

      39.1  This Agreement may be amended upon the submission to FERC and
            acceptance by FERC of that amendment. The Parties through the
            Executive Committee shall direct the filing of any amendments. The
            Parties to this Agreement agree to bound by this Agreement as it may
            be amended, provided that the Parties possess the right to challenge
            any amendments at FERC and to exercise any applicable withdrawal
            rights under this Agreement.

      39.2  Unless otherwise stated in the amendment, all amendments shall apply
            only to new transactions entered into or agreed to on or after the
            effective date of the amendment. Preexisting agreements and
            transactions shall operate under the version of the WSPP Agreement
            effective at the time of the agreement for the transaction unless
            the Parties to a transaction or transactions mutually agree
            otherwise.

      39.3  An agreement modifying this Agreement or a Confirmation Agreement
            for a transaction needs no consideration to be binding.

40.   EXECUTION BY COUNTERPARTS:

            This Agreement may be executed in any number of counterparts, and
      upon execution by all Parties, each executed counterpart shall have the
      same force and effect as

Issued by:  Michael E. Small, General Counsel to     Effective:  March 1, 2002
                  Western Systems Power Pool
Issued on:  December 21, 2001
<PAGE>
Western Systems Power Pool                          First Revised Sheet No. 59
Rate Schedule FERC No. 6                     Superseding Original Sheet No. 59

      an original instrument and as if all Parties had signed the same
      instrument. Any signature page of this Agreement may be detached from any
      counterpart of this Agreement without impairing the legal effect of any
      signatures thereon, and may be attached to another counterpart of this
      Agreement identical in form hereto but having attached to it one or more
      signature pages.

41.   WITNESS:

            IN WITNESS WHEREOF, the Parties have caused this Agreement to be
      executed by their duly authorized representative as of the 27th day of
      July, 1991 (or as of the date of execution of this Agreement by each
      Party's duly authorized representation, in the case of any Party that
      becomes a signatory to this Agreement subsequent to July 27, 1991).

                        By:________________________________
                        Name:
                        Title:

Issued by:  Michael E. Small, General Counsel to      Effective: March 1, 2002
                  Western Systems Power Pool
Issued on:  December 21, 2001
<PAGE>
Western Systems Power Pool                               Original Sheet No. 60
Rate Schedule FERC No. 6

                                    EXHIBIT A

                                     NETTING

      Each Party that executes this Exhibit A to the Agreement agrees to net
payments for transactions under WSPP Service Schedule A, B, and C with any other
Party or Parties which also have agreed to net payments by executing a copy of
this Exhibit A. The Party executing this Exhibit A shall indicate below when it
desires that its agreement to net becomes effective. A Party agreeing to net
under this Exhibit A shall comply with the provisions of Section 28.2 of the
Agreement. Defined terms used herein are as defined in the WSPP Agreement.
Netting shall be done in accordance with the following provision:

            If the Purchaser and Seller are each required to pay an amount on
            the payment due date in the same month for transactions under the
            Agreement or Confirmation Agreement, then such amounts with respect
            to each Party will be aggregated and the Parties will discharge
            their obligations to pay through netting, in which case the Party
            owing the greater aggregate amount will pay to the other party the
            difference between the amounts owed consistent with the payment
            times in Section 9.2 of the Agreement, unless the Parties have
            otherwise agreed to a different payment time as allowed by the
            Agreement. Each Party reserves to itself all rights, set-offs,
            counterclaims and other remedies and/or defenses to which it is or
            may be entitled, arising from or out of the Agreement. All
            outstanding payments between the Parties which are to be netted
            pursuant to this Exhibit A for transactions under WSPP Service
            Schedule A, B, and C shall be offset against each other or set off
            or recouped therefrom.

----------------------------------        --------------------------
Name of Authorized Representative               Effective Date for Netting

----------------------------------
Name of WSPP Member

----------------------------------        --------------------------
Signature of Authorized                         Date of Execution
Representative

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 61
Rate Schedule FERC No. 6

      [WSPP SAMPLE FORM - PARTIES ARE FREE TO USE THIS OR DISREGARD IT.]

                                    EXHIBIT B

FORM OF COUNTERPARTY GUARANTEE AGREEMENT

      This Guarantee Agreement (this "Guarantee"), dated, as of [__________],
199[__], is made and entered into by [_____________], a [__________] corporation
("Guarantor").

                                   WITNESSETH:

      WHEREAS, [___________________] (the "Company") may enter into transactions
involving power sales under the Western Systems Power Pool ("WSPP Agreement")
and related confirmation agreements(1) (collectively "Agreements") with [Company
Name] ("Guaranteed Party"); and

      WHEREAS, Guarantor will directly or indirectly benefit from the
Agreements.

      NOW THEREFORE, in consideration of the Guaranteed Party agreeing to
conduct business with Company, Guarantor hereby covenants and agrees as follows:

      1. GUARANTY. Subject to the provisions hereof, Guarantor hereby
irrevocably and unconditionally guarantees the timely payment when due of the
obligations of Company (the "Obligations") to the Guaranteed Party in accordance
with the Agreements. If Company fails to pay any Obligations, Guarantor shall
promptly pay to the Guaranteed Party no later than the next Business Day (as
defined in the WSPP Agreement), after notification, the amount due in the same
currency and manner provided for in the Agreements. This Guarantee shall
constitute a guarantee of payment and not of collection. Guarantor shall have no
right of subrogation with respect to any payments it makes under this Guarantee
until all of the Obligations of Company to the Guaranteed Party are paid in
full. The liability of Guarantor under the Guarantee shall be subject to the
following:

            (a) Guarantor's liability hereunder shall be and is specifically
limited to payments expressly required to be made in accordance with the
Agreements (even if such payments are deemed to be damages) and, except to the
extent specifically provided in the Agreements, in no event shall Guarantor be
subject hereunder to consequential, exemplary, equitable, loss of profits,
punitive, tort, or any other even if such fees together with the payments

---------------------------------------
(1)

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 62
Rate Schedule FERC No. 6

exceed the cap in Section 1(b), damages, costs, except that Guarantor shall be
required to pay reasonable attorney fees.

            (b)   The aggregate liability of the Guarantor shall not exceed
[_____] Million U.S. Dollars [___________].

      2. DEMANDS AND NOTICE. If Company fails or refuses to pay any Obligations,
the Guaranteed Party may make a demand upon Guarantor (hereinafter referred to
as a "Payment Demand"). A Payment Demand shall be in writing and shall
reasonably and briefly specify in what manner and what amount Company has failed
to pay and an explanation of why such payment is due, with a specific statement
that the Guaranteed Party is calling upon Guarantor to pay under this Guarantee.
A Payment Demand satisfying the foregoing requirements shall be deemed
sufficient notice to Guarantor that it must pay the Obligations. A single
written Payment Demand shall be effective as to any specific default during the
continuance of such default, until Company or Guarantor has cured such default,
and additional Payment Demands concerning such default shall not be required
until such default is cured.

      3. REPRESENTATIONS AND WARRANTIES. Guarantor represents and warrants that:

            (a) it is a corporation duly organized and validly existing under
the laws of the State of [_____________] and has the corporate power and
authority to execute, deliver and carry out the terms and provisions of this
Guarantee;

            (b) no authorization, approval, consent or order of, or registration
or filing with, any court or other governmental body having jurisdiction over
Guarantor is required on the part of Guarantor for the execution and delivery of
this Guarantee; and

            (c) this Guarantee constitutes a valid and legally binding agreement
of Guarantor enforceable against Guarantor in accordance with its terms, except
as the enforceability of this Guarantee may be limited by the effect of any
applicable bankruptcy, insolvency, reorganization, moratorium or similar laws
affecting creditors' rights generally and by general principles of equity.

      4. EFFECT OF BANKRUPTCY BY COMPANY. The Guarantor's obligation to pay
under this Guarantee shall not be affected in any way by the institution with
respect to the Company of a bankruptcy, reorganization, moratorium or similar
insolvency proceeding or other relief under any bankruptcy or insolvency law
affecting creditor's rights or a petition for the Company's winding-up or
liquidation.

      5. AMENDMENT. No term or provision of this Guarantee shall be amended,
modified, altered, waived, or supplemented except in a writing signed by the
Guarantor and Guaranteed Party hereto.

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 63
Rate Schedule FERC No. 6

      6. WAIVERS. Guarantor hereby waives (a) notice of acceptance of this
Guarantee; (b) presentment and demand concerning the liabilities of Guarantor,
except as expressly hereinabove set forth; and (c) any right to require that any
action or proceeding be brought against Company or any other person, or except
as expressly hereinabove set forth, to require that the Guaranteed Party seek
enforcement of any performance against Company or any other person, prior to any
action against Guarantor under the terms hereof.

      Except as to applicable statutes of limitation, no delay of the Guaranteed
Party in the exercise of, or failure to exercise, any rights hereunder shall
operate as a waiver of such rights, a waiver of any other rights or a release of
Guarantor from any obligations hereunder.

      Guarantor consents to the renewal, compromise, extension, acceleration or
other changes in the time of payment of or other changes in the terms of the
Obligations, or any part thereof or any changes or modifications to the terms of
the Agreements.

      Guarantor may terminate this Guarantee by providing written notice of such
termination to the Guaranteed Party and upon the effectiveness of such
termination, Guarantor shall have no further liability hereunder, except as
provided in the last sentence of this paragraph. No such termination shall be
effective until fifteen (15) Business Days after receipt by the Guaranteed Party
of such termination notice. No such termination shall affect Guarantor's
liability with respect to any obligations arising under any transaction entered
into prior to the time the termination is effective, which transaction shall
remain guaranteed pursuant to the terms of this Guarantee.

      7. ASSIGNMENT. The Guarantor shall not assign this Guarantee without the
express written consent of the Guaranteed Party. The Guaranteed Party shall be
entitled to assign its rights under this Agreement in its sole discretion.

      8. NOTICE. Any Payment Demand, to the Guaranteed Party or the Guarantor
notice, request, instruction, correspondence or other document to be given
hereunder by any party to another (herein collectively called "Notice") shall be
in writing and delivered personally or mailed by certified mail, postage prepaid
and return receipt requested, or by telegram or telecopier, as follows:

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 64
Rate Schedule FERC No. 6

      To [Name of Guaranteed Party]        ____________________________
                                           ____________________________
                                           ____________________________
                                     Attn: ____________________________

                                     Fax No.: (___) ___________________

      To Guarantor:                        ____________________________
                                           ____________________________
                                           ____________________________
                                     Attn: ____________________________

                                     Fax No.: (___) ___________________

      Notice given by personal delivery or mail shall be effective upon actual
receipt. Notice given by telegram or telecopier shall be effective upon actual
receipt if received during the recipient's normal business hours, or at the
beginning of the recipient's next business day after receipt if not received
during the recipient's normal business hours. All Notices by telegram or
telecopier shall be confirmed promptly after transmission in writing by
certified mail or personal delivery. Any party may change any address to which
Notice is to be given to it by giving notice as provided above of such change of
address.

      8. MISCELLANEOUS. THIS GUARANTEE SHALL IN ALL RESPECTS BE GOVERNED BY, AND
CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF [State], WITHOUT REGARD
TO PRINCIPLES OF CONFLICTS OF LAWS. This Guarantee shall be binding upon
Guarantor, its successors and assigns and inure to the benefit of and be
enforceable by the Guaranteed Party, its successors and assigns. The Guarantee
embodies the entire agreement and understanding between Guarantor and the
Guaranteed Party and supersedes all prior agreements and understandings relating
to the subject matter hereof. The headings in this Guarantee are for purposes of
reference only, and shall not affect the meaning hereof. This Guarantee may be
executed in any number of counterparts, each of which shall be an original, but
all of which together shall constitute one instrument.

EXECUTED as of the day and year first above written.

                              [_____________________________]
                              By:  __________________________
                              Name:  ________________________
                              Title:  _______________________

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                         Second Revised Sheet No. 65
Rate Schedule FERC No. 6                Superseding First Revised Sheet No. 65

                                    EXHIBIT C

                          SAMPLE FORM FOR CONFIRMATION

1.    TRANSACTION SPECIFIC AGREEMENTS

            The undersigned Parties agree to sell and purchase electric energy,
      or a Physically-Settled Option, pursuant to the WSPP Agreement as it is
      supplemented and modified below:

      (a)   Seller:     __________________________________
      (b)   Purchaser:  __________________________________
      (c)   Period of Delivery:  From __\__\__  To  __\__\__
      (d)   Schedule (Days and Hours):  __________________
      (e)   Delivery Rate:________________________________
      (f)   Delivery Point(s):  __________________________
      (g)   Type of Service (Check as Applicable)
                  Service Schedule A _________
                  Service Schedule B _________
                  Service Schedule C _________
                  Physically-Settled Option Service Schedule B ______
                  Physically-Settled Option Service Schedule C ______
                  Other products per Section 32.6 _________________ [DESCRIBE
                                                                    PRODUCT]
      (h)   Contract Quantity:  ________ Total MWhrs.
      (i)   Contract or Strike Price:  _____________________
      (j)   Transmission Path for the Transaction (If Applicable):
      (k)   Date of Agreement if different:  _____________
      (l)   Additional Information for Physically-Settled Options
            (i)   Option Type:      Put __________    Call______________
            (ii)  Option Style: __________
            (iii) Exercise Date or Period: __________
            (iv)  Premium:        __________
            (v)   Premium Payment Date:  _________
            (vi)  Method for providing notice of exercise__________________
      (m)   Special Terms and Exceptions:
            See Attachment A

[Special Terms and Exceptions shall be shown on an Attachment to this
Confirmation.]

----------------------------        ---------------------------
Name of Trader for Purchaser        Name of Trader for Seller

Issued by:  Michael E. Small, General Counsel to     Effective:  March 1, 2002
                  Western Systems Power Pool
Issued on:  December 21, 2001
<PAGE>
Western Systems Power Pool                               Original Sheet No. 66
Rate Schedule FERC No. 6

---------------------------   ---------------------------
Authorized Signature                Authorized Signature
      for Purchaser                       for Seller

---------------------------   ---------------------------
Date                          Date

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 67
Rate Schedule FERC No. 6

                                    EXHIBIT D

                  WSPP MEDIATION AND ARBITRATION PROCEDURES

I.    MEDIATION

      A.    INFORMAL MEDIATION.  WSPP members with a dispute or a potential
            dispute involving transactions under the WSPP Agreement may
            request non-binding, informal mediation by contacting the WSPP's
            General Counsel and by providing a brief explanation in writing
            of the dispute and the remedy being sought.  All parties to the
            dispute must request this Informal Mediation for it to become
            effective.  After this contact, a telephonic conference call will
            be arranged among the affected WSPP members and the WSPP's
            General Counsel, the Chairman of the Operating Committee, and/or
            some other independent and knowledgeable person requested by the
            Chairman of the Operating Committee to participate.  The purpose
            of the conference call will be to discuss the issues and to have
            an independent person or persons state their views.  Best efforts
            will be made to set up this conference call within five  Business
            Days after the WSPP's General Counsel is contacted subject to
            accommodating the schedules of all involved.  This Informal
            Mediation shall be considered as satisfying the Mediation
            requirements of Section 34.1 of the WSPP Agreement.

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 68
Rate Schedule FERC No. 6

      B.    INITIATING FORMAL MEDIATION.  A WSPP member which believes that
            it possesses a claim against another WSPP member relating to a
            WSPP transaction, which is unable to resolve the dispute through
            agreement with the other member to the transaction, and which
            desires to pursue that claim shall initiate non-binding formal
            mediation pursuant to Section 34.1 of the WSPP Agreement.  The
            member initiating such mediation shall do so by Serving written
            notice to the Chairman of the WSPP Operating Committee, the
            WSPP's General Counsel, and the other members against which the
            claim is directed.  Such notice shall state the nature of the
            dispute, the remedy sought, and support the claim.

      C.    RESPONSE TO DOCUMENT INITIATING FORMAL MEDIATION. Within eight days,
            the member or members against which the claim is directed may
            provide a response to the notice which shall be Served on the member
            which initiated the Mediation, the Chairman of the WSPP's Operating
            Committee, and the WSPP's General Counsel.

      D.    CHOOSING THE MEDIATOR. The Mediator shall be chosen in accordance
            with the procedures set forth in Section 34.1 of the WSPP Agreement.
            Each Party may suggest persons to be included on the list of
            Mediators to be presented to the Parties provided that these
            suggested persons shall be provided to the WSPP Representative
            together with relevant personal histories within two Business Days

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 69
Rate Schedule FERC No. 6

            of the date by which time the list of Mediators is to be sent out.
            The WSPP Representative shall allow at least one person suggested by
            each Party to be added to the list of Mediators. A brief personal
            history of each person on the list of potential mediators shall be
            provided to the Parties, with that history showing the person's
            employment over the last five years and any other relevant facts.
            The WSPP Representative shall provide the Parties with the list of
            Mediators within five days of receipt of notice of the dispute. The
            Parties then shall have five days in which to reach agreement on a
            Mediator or inform the WSPP Representative that they were unable to
            reach agreement in which event the WSPP Representative shall appoint
            the Mediator consistent with Section 34.1 of the WSPP Agreement.
            Upon request of the Parties for expedition, the WSPP Representative
            shall use best efforts to expedite this process.

      E.    LOCATION FOR THE FORMAL MEDIATION.  The Parties shall agree on a
            location for the Mediation.  If the Parties fail to reach
            agreement, then the WSPP Representative shall set the location
            which shall be convenient for the Parties and the Mediator.

      F.    TIME FOR THE FORMAL MEDIATION.  The Parties shall agree on the
            time for the Mediation after consultation with the Mediator if
            one has been appointed.  If the Parties fail to reach agreement,
            then the WSPP Representative shall set the time

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 70
Rate Schedule FERC No. 6

            which shall not be more than twenty-one days after the notice
            initiating the Mediation is received after consultation with the
            Parties and any Mediator.

      G.    CONDUCT OF THE FORMAL MEDIATION.  The Mediator shall have the
            ability to conduct the Mediation in any manner which the Mediator
            believes is appropriate to facilitate resolution of the dispute.
            Each Party shall have at least one representative with the
            authority to settle the dispute present at the Mediation.  The
            Mediation shall be private and confidential and the Mediator
            shall have the authority to exclude any person not directly
            involved unless the Parties agree otherwise in writing.  At the
            Mediation, each Party shall have the right to make a brief
            presentation of its case and to question the other Party.  Each
            Party also may be represented by counsel.

      H.    REPLACEMENT OF THE MEDIATOR.  If the Mediator resigns, withdraws
            or is no longer able to serve, then the Parties shall have two
            Business Days in which to agree on a new Mediator.  If the
            Parties are unable to agree within such time, the WSPP
            Representative shall appoint a replacement Mediator from the list
            used to select the first Mediator within two Business Days after
            being notified that the Parties are unable to agree.  The dates
            and deadlines in this section may require modification if the
            mediator is replaced.  Any extensions shall be as limited as
            possible.

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 71
Rate Schedule FERC No. 6

II.   ARBITRATION

      A.    INITIATING ARBITRATION. A WSPP member which initiates Arbitration
            pursuant to Section 34.2 of the WSPP Agreement shall do so by
            Serving the Chairman of the WSPP Operating Committee, the WSPP
            General Counsel and the members against which the claim is directed
            with written notice of its demand for arbitration. Such notice shall
            state the nature of the dispute, the remedy sought, and support the
            claim.

      B.    RESPONSE.  Within ten days of receipt of the notice, any member
            or members against which the claim is directed may provide a
            response to the notice.  Such response must include any
            counterclaims which the member believes are appropriate.  If a
            counterclaim is submitted, then the member which submitted the
            notice may respond to the counterclaim within ten days of
            receipt.  All such responses shall be Served on the Parties, the
            Chairman of the WSPP Operating Committee, and the WSPP General
            Counsel.

      C.    CHOOSING THE ARBITRATOR.  The Arbitrator shall be chosen in
            accordance with the procedures set forth in Section 34.2 of the
            WSPP Agreement.  Each Party may suggest persons to be included on
            the list of Arbitrators to be presented to the Parties provided
            that these suggested persons are provided to the WSPP
            Representative together with relevant personal histories within
            two business days

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 72
Rate Schedule FERC No. 6

            of the date by which time the list of Arbitrators is to be sent out.
            The WSPP Representative shall allow at least one person suggested by
            each Party to be added to the list of potential Arbitrators. A brief
            personal history of each person on the list of potential Arbitrators
            shall be provided to the Parties, with that history showing the
            person's employment over the last five years and any other relevant
            facts. The WSPP Representative shall provide the Parties with the
            list of Arbitrators within seven days of receipt of notice of the
            request for Arbitration. The Parties then shall have ten days in
            which to reach agreement on the Arbitrator or to inform the WSPP
            Representative that they were unable to reach agreement in which
            event the WSPP Representative shall appoint the Arbitrator
            consistent with Section 34.2 of the Agreement. Upon request of the
            Parties for expedition, the WSPP Representative shall use best
            efforts to cause this process to be expedited.

      D.    LOCATION FOR THE ARBITRATION.  The Parties shall agree on a
            location for the Arbitration.  If the Parties fail to reach
            agreement, then the WSPP Representative shall set the location
            which shall be convenient for the Parties and the Arbitrator.

      E.    TIME FOR THE ARBITRATION.  The Parties shall agree on the time
            for the Arbitration and coordinate that time with the Arbitrator
            if one has been agreed to or appointed.  If the Parties fail to
            reach agreement, then the WSPP Representative

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 73
Rate Schedule FERC No. 6

            shall set the time which shall not be more than 60 days after the
            notice is received. The WSPP Representative shall set a time after
            consultation with the Parties and the Arbitrator to check their
            schedules.

      F.    DISCOVERY.  After appointment of the Arbitrator, each Party shall
            be entitled to obtain relevant documents from the other Parties
            and to take depositions.  Each Party shall respond to such a
            document request within seven days of receipt of the request and
            make its employees or consultants available for depositions to
            the extent that the employee or consultant possesses knowledge
            and information relevant to the dispute.  Each Party shall
            disclose documents that are confidential or commercially
            sensitive subject to a reasonable protective order.  Any disputes
            concerning discovery shall be promptly referred to the Arbitrator
            who shall have authority to resolve such disputes, including the
            authority to require attendance of witnesses at depositions.  The
            Federal Rules of Civil Procedure shall apply to discovery under
            these procedures.

      G.    CONDUCT OF ARBITRATION IF THE PARTIES AGREE TO WAIVE AN ORAL
            HEARING. If the Parties agree to waive an oral hearing, then the
            Parties shall Serve Initial Briefs no later than 35 days after the
            notice is received or notify the Arbitrator that they do not wish to
            submit any additional documents. Parties shall Serve any Reply
            Briefs no later than ten days after the date for Service of Initial
            Briefs.

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 74
Rate Schedule FERC No. 6

      H.    CONDUCT OF THE ARBITRATION HEARING.  No later than fifteen days
            before any hearing, any Party may Serve an Initial Brief or
            notify the Arbitrator that they do not wish to submit any
            additional documents.  A Party shall Serve any Reply Brief no
            later than five Business Days before any hearing.  The Arbitrator
            shall preside over any hearing and rule on all objections
            including objections as to the admissibility of evidence or
            whether the questioning is proper.  All testimony shall be
            submitted under oath.  The Arbitrator is not bound to follow any
            particular rules governing the conduct of the proceeding.  The
            Arbitrator may rely on legal advice provided through the WSPP.
            The Arbitrator may require any person employed by a Party to
            attend and testify at the hearing.  Each Party shall possess the
            right to present evidence, including witnesses, and to
            cross-examine other Parties' witnesses.  The Arbitration shall be
            private and the Arbitrator shall have the authority to exclude
            any person not directly involved unless the Parties otherwise
            agree.  Each Party may be represented by counsel.  A stenographic
            record of the Arbitration shall be kept.

      I.    DECISION.  Within ten Business Days after the end of the
            Arbitration hearing, the Arbitrator shall issue his award in
            writing.  If the Parties waived the right to an oral hearing,
            then the Arbitrator shall issue the award within ten Business
            Days of the last date Briefs were to be submitted.  The
            Arbitrator is not limited in the

Issued by: Michael E. Small, General Counsel to          Effective: July 1, 2000
           Western Systems Power Pool
Issued on: September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission, Docket
Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 75
Rate Schedule FERC No. 6

            remedies he may order so long as any arbitration award is consistent
            with the provisions and limitations of the WSPP Agreement and any
            applicable Confirmation Agreement with respect to the liability and
            damages of any Party; provided, however, upon agreement of the
            Parties to the dispute, the Arbitrator's choice of remedies may be
            limited.

      J.    REPLACEMENT OF THE ARBITRATOR.  If the Arbitrator resigns,
            withdraws, or is no longer able to serve then the Parties shall
            have two Business Days in which to agree on a new Arbitrator.  If
            the Parties are unable to agree within such time, the WSPP
            Representative shall appoint a replacement Arbitrator from the
            list used to select the first Arbitrator within two Business Days
            after being notified that the Parties are unable to agree.  The
            dates and deadlines in this section may require modification if
            the mediator is replaced.  Any extensions shall be as limited as
            possible.

III.  MISCELLANEOUS

      A.    CONFIDENTIALITY.  Any Arbitration or Mediation shall be
            confidential as provided in Section 34.4 of the WSPP Agreement.

      B.    COSTS.  Costs shall be borne by Parties as provided in Section
            34.3 of the WSPP Agreement.

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 76
Rate Schedule FERC No. 6

      C.    RESTRICTIONS ON LAWSUITS.  Each Party shall be subject to the
            restrictions provided in Section 34.2 of the WSPP Agreement.

      D.    ATTORNEY-CLIENT/ATTORNEY WORKPRODUCT. The Arbitrator or Mediator
            shall not take any action which would result in disclosure of
            information in violation of the attorney-client privilege or
            attorney workproduct doctrine.

IV.   DEFINITIONS

      A.    ARBITRATOR OR ARBITRATION.  The Arbitrator appointed pursuant to
            these procedures and Section 34.2 of the WSPP Agreement and the
            Arbitration pursuant to these procedures and the WSPP Agreement.

      B.    INITIAL OR REPLY BRIEFS.  Written documents submitted by the
            Parties to support their positions and respond to each others
            positions.  Such documents shall be limited to 25 pages.

      C.    BUSINESS DAYS.  Defined as in the WSPP Agreement.

      D.    MEDIATOR OR MEDIATION.  The Mediator appointed pursuant to these
            procedures and Section 34.1 of the WSPP Agreement and the Mediation
            pursuant to these procedures and the WSPP Agreement.

      E.    PARTIES.  The WSPP members involved in the Mediation or
            Arbitration which have a direct interest in the dispute.

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 77
Rate Schedule FERC No. 6

      F.    SERVICE, SERVING, OR SERVED.  The method of service shall be by
            fax, unless impracticable because of the size of the document.
            In all events, the document should be delivered to the Party by
            overnight mail.  Parties also should attempt to send the document
            out by email if possible.  Service will be accomplished to a
            Party if sent to the Party's contact person for the disputed
            transaction.  If there are multiple contact persons for one
            Party, service to one such person shall suffice.  Service shall
            be to those individuals or entities specified in this procedures,
            but must include service to the Parties, the Mediator or
            Arbitrator (if either has been appointed), and to the WSPP
            General Counsel.

      G.    WSPP REPRESENTATIVE.  The Chairman of the WSPP Operating
            Committee or his or her designee for the purposes of the
            Arbitration or Mediation.

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 78
Rate Schedule FERC No. 6

                               SERVICE SCHEDULE A

                             ECONOMY ENERGY SERVICE

A-1   PARTIES:

      This Service Schedule is agreed upon as a part of this Agreement by the
      Parties.

A-2   PURPOSE:

      The purpose of this Service Schedule is to define additional specific
      procedures, terms and conditions for requesting and providing Economy
      Energy Service.

A-3   TERMS:

      A-3.1 A Party may schedule Economy Energy Service from another Party by
            mutual agreement; provided, however, that each Party shall be the
            sole judge as to the extent to and the conditions under which it is
            willing to provide or receive such service hereunder consistent with
            statutory requirements and contractual commitments including the
            Agreement and any applicable Confirmation Agreement.

      A-3.2 Scheduling of Economy Energy Service hereunder shall be a
            responsibility of the Parties involved.

      A-3.3 Each Seller/Purchaser may prepare a daily estimate of the amount of
            Economy Energy Service that it is willing and able to sell/buy each
            hour and the associated hourly sale/purchase price for the next
            Business Day, plus the weekend and

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 79
Rate Schedule FERC No. 6

            holidays, and communicate this information to all other Parties
            via the Hub.

      A-3.4 Purchasers shall arrange purchases directly with Sellers, and shall
            be responsible for transmission arrangements.

      A-3.5 Unless otherwise mutually agreed between the Purchaser and the
            Seller, all Economy Energy Service transactions shall be
            pre-scheduled, and billings shall be based on amounts and prices
            agreed to in advance by schedulers, subject to Paragraphs A-3.6 and
            3.7 and subject to change by mutual agreement between dispatchers or
            schedulers due to system changes.

      A-3.6 The price for Economy Energy Service shall be mutually agreed to in
            advance between Seller and Purchaser and shall not be subject to the
            rate caps specified in Section A-3.7 in either of the following two
            circumstances:

            (1)   where the Seller is a FERC regulated public utility and that
                  Seller has been authorized to sell power like that provided
                  for under this Service Schedule at market-based rates; or

            (2)   where the Seller is not a FERC regulated public utility. A
                  Party is a FERC regulated public utility if it is a "public
                  utility" as defined in Section 201(e) of the Federal Power
                  Act, 16 U.S.C. Section 824(e).

      A-3.7 Except as provided for in Section A-3.6, the price shall not exceed
            the Seller's forecasted Incremental Cost plus up to:

            $7.32/kW/ month; $1.68/kW/week;

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 80
Rate Schedule FERC No. 6

            33.78(cent)/kW/day; 14.07 mills/kWh; or 21.11 mills/kWh for service
            of sixteen (16) hours or less per day. The hourly rate is capped at
            the Seller's forecasted Incremental Cost plus 33.78(cent)/kW/ day.
            The total demand charge revenues in any consecutive seven-day period
            shall not exceed the product of the weekly rate and the highest
            demand experienced on any day in the seven-day period. In lieu of
            payment, such Parties may mutually agree to exchange economy energy
            at a ratio not to exceed that ratio provided for in Section C-3.7 of
            Service Schedule C. The Seller's forecasted Incremental Cost
            discussed above also may include any transmission and/or ancillary
            service costs associated with the sale, including the cost of any
            transmission and/or ancillary services that the Seller must take on
            its own system. Any such transmission and/or ancillary services
            charges shall be separately identified by the Seller to the
            Purchaser for transactions under this Schedule including the
            exchange of economy energy. The transmission and ancillary service
            rate ceilings shall be available through the WSPP's Hub or homepage.
            Any such transmission services (and ancillary service provided in
            conjunction with such transmission service) by Seller shall be
            provided pursuant to any applicable transmission tariff or
            agreement, and the rates therefore shall be consistent with such
            tariff or agreement.

      A-3.8 Unless otherwise agreed, the Purchaser shall be responsible for
            maintaining

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 81
Rate Schedule FERC No. 6

            operating reserve requirements as back-up for Economy Energy Service
            purchased and the Seller shall not be required to maintain such
            operating reserve.

      A-3.9 Each Party that is a FERC regulated public utility as defined in
            A-3.6 shall file the Confirmation Agreement with FERC for each
            transaction under this Service Schedule with a term in excess of one
            year no later than 30 days after service begins if that Party would
            have been required to file such Confirmation Agreements or similar
            agreements with FERC under an applicable FERC accepted market based
            rate schedule.

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 82
Rate Schedule FERC No. 6

                               SERVICE SCHEDULE B

                             UNIT COMMITMENT SERVICE

B-1   PARTIES:

      This Service Schedule is agreed upon as part of this Agreement by the
      Parties.

B-2   PURPOSE:

      The purpose of this Service Schedule is to define additional specific
      procedures, terms, and conditions for requesting and providing Unit
      Commitment Service.

B-3   TERMS:

      B-3.1 A Party may schedule Unit Commitment Service from another Party by
            mutual agreement; provided, however, that each Party shall be the
            sole judge as to the extent to and the conditions under which it is
            willing to provide or receive such service hereunder consistent with
            statutory requirements and contractual commitments including the
            Agreement and any applicable Confirmation Agreement. Once an
            agreement is reached, then the obligation for Unit Commitment
            Service becomes a firm commitment, for both Parties, for the agreed
            capacity and terms.

      B-3.2 Unless otherwise mutually agreed by the Parties involved in a Unit
            Commitment Service transaction, the terms set forth in this Service
            Schedule B shall govern such transaction.

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 83
Rate Schedule FERC No. 6

      B-3.3 Unless otherwise agreed between the Purchaser and the Seller, all
            transactions shall be prescheduled, subject to any conditions agreed
            to by schedulers, for a specified unit for a specified period of
            time.

      B-3.4 Purchasers shall arrange purchases directly with Sellers.

      B-3.5 The price for Unit Commitment Service shall be mutually agreed to in
            advance between Seller and Purchaser and shall not be subject to the
            rate caps specified in Section B-3.6 in either of the following two
            circumstances:

            (1)   where the Seller is a FERC regulated public utility and that
                  Seller has been authorized to sell power like that provided
                  for under this Service Schedule at market-based rates; or

            (2)   where the Seller is not a FERC regulated public utility. A
                  Party is a FERC regulated public utility if it is a "public
                  utility" as defined in Section 201(e) of the Federal Power
                  Act, 16 U.S.C. Section 824(e).

      B-3.6 Except as provided for in Section B-3.5, the price shall not exceed
            the Seller's forecasted Incremental Cost plus up to: $7.32/kW/month;
            $1.68/kW/week; 33.78(cent)/kW/day; 14.07 mills/kWh; or 21.11
            mills/kWh for service of sixteen (16) hours or less per day. The
            hourly rate is capped at the Seller's forecasted Incremental Cost
            plus 33.78(cent)/kW/day. The total demand charge revenues in any
            consecutive seven-day period shall not exceed the product of the
            weekly rate and the

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 84
Rate Schedule FERC No. 6

            highest demand experienced on any day in the seven-day period. The
            Seller's forecasted Incremental Cost discussed above also may
            include any transmission and/or ancillary service costs associated
            with the sale, including the cost of any transmission and/or
            ancillary services that the Seller must take on its own system. Any
            such transmission and/or ancillary service charges shall be
            separately identified by the Seller to the Purchaser. The
            transmission and ancillary service rate ceilings shall be available
            through the WSPP's Hub or homepage.

      B-3.7 Start-up costs and no-load costs if included by the Seller shall be
            stated separately in the price.

      B-3.8 Energy schedules for the Purchaser's share of a unit may be modified
            by the Purchaser with not less than a thirty (30) minute notice
            before the hour in which the change is to take place, unless
            otherwise mutually agreed or unforeseen system operating conditions
            occur.

      B-3.9 Unit Commitment Service is intended to have assured availability;
            however, scheduled energy deliveries may be interrupted or curtailed
            as follows:

            (a)   By the Seller by giving proper recall notice to the Purchaser
                  if the Seller and the Purchaser have mutually agreed to recall
                  provisions,

            (b)   By the Seller when all or a portion of the output of the
                  unit is unavailable, by an amount in proportion to the
                  amount of the reduction in the output of the

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 85
Rate Schedule FERC No. 6

                  unit, unless otherwise agreed by the schedulers,

            (c)   By the Seller to prevent system separation during an
                  emergency, provided the Seller has exercised all prudent
                  operating alternatives prior to the interruption or
                  curtailment,

            (d)   Where applicable, by the Seller to meet its public utility
                  or statutory obligations to its customers, or

            (e)   By either the Seller or the Purchaser due to the
                  unavailability of transmission capacity necessary for the
                  delivery of scheduled energy.

      B-3.10 Each Party that is a FERC regulated public utility as defined above
             in B-3.5 shall file the Confirmation Agreement with FERC for each
             transaction under this Service Schedule with a term in excess of
             one year no later than 30 days after service begins if that Party
             would have been required to file such Confirmation Agreements or
             similar agreements with FERC under an applicable FERC accepted
             market based rate schedule.

B-4   BILLING AND PAYMENT PROVISIONS:

      B-4.1 Except as provided in Sections B-4.2 and B-5, billing for Unit
            Commitment Service shall be computed based upon the agreed upon
            prices.

      B-4.2 In the event the Seller requests recall of Unit Commitment Service
            in a shorter time frame than was mutually agreed pursuant to Section
            B-3.9(a) and the

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                               Original Sheet No. 86
Rate Schedule FERC No. 6

            Purchaser agrees to allow such recall, the Purchaser shall be
            relieved of any obligation to pay start-up costs.

B-5   TERMINATION PROVISION:

      In the event Unit Commitment Service is curtailed or interrupted except as
      provided in Section B-3.9(a), the Purchaser shall have the option to
      cancel the Unit Commitment Service at any time by paying the Seller for
      (i) all energy deliveries scheduled up to the notice of termination and
      (ii) all separately stated start-up and no-load costs.

Issued by:  Michael E. Small, General Counsel to      Effective:  July 1, 2000
                  Western Systems Power Pool
Issued on:  September 29, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                          First Revised Sheet No. 87
Rate Schedule FERC No. 6                     Superseding Original Sheet No. 87

                               SERVICE SCHEDULE C

                 FIRM CAPACITY/ENERGY SALE OR EXCHANGE SERVICE

C-1   PARTIES:

      This Service Schedule is agreed upon as a part of this Agreement by the
      Parties.

C-2   PURPOSE:

      The purpose of this Service Schedule is to define additional specific
      procedures, terms, and conditions for requesting and providing Firm
      Capacity/Energy Sale or Exchange Service.

C-3   TERMS:

      C-3.1 A Party may schedule Firm Capacity/Energy Sale or Exchange Service
            from another Party by mutual agreement; provided, however, that each
            Party shall be the sole judge as to the extent to and the conditions
            under which it is willing to provide or receive such service
            hereunder consistent with statutory requirements and contractual
            commitments including the Agreement and any applicable Confirmation
            Agreement. Once an agreement is reached, then the obligation for
            Firm Capacity/Energy Sale or Exchange Service becomes a firm
            commitment, for both Parties, for the agreed service and terms.

      C-3.2 Unless otherwise agreed between the Purchaser and the Seller, all
            transactions shall be prescheduled, subject to any conditions agreed
            to by schedulers.

      C-3.3 Firm capacity transactions shall include buying, selling, or
            exchanging capacity between Parties with or without associated
            energy. Firm capacity is deemed a capacity sale from the Seller's
            resources and backed by the Seller's

Issued by:  Michael E. Small, General Counsel to  Effective:  February 1, 2001
                  Western Systems Power Pool
Issued on:  December 1, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                          First Revised Sheet No. 88
Rate Schedule FERC No. 6                     Superseding Original Sheet No. 88

            capacity reserves.

      C-3.4 Firm energy transactions shall include buying, selling, or
            exchanging firm energy between Parties. Subject to mutual agreement,
            firm energy is deemed a quantity of energy the Seller has agreed to
            sell and deliver and the Purchaser has agreed to buy within a
            specified time period.

      C-3.5 Purchaser shall arrange purchases directly with Sellers.

      C-3.6 The price for Firm Capacity/Energy Sale or Exchange Service shall be
            mutually agreed to in advance between Seller and Purchaser and shall
            not be subject to the rate caps specified in Section C-3.7 in either
            of the following two circumstances:

            (1)   where the Seller is a FERC regulated public utility and
                  that Seller has been authorized to sell power like that
                  provided for under this Service Schedule at market-based
                  rates; or

            (2)   where the Seller is not a FERC regulated public utility.

            A Party is a FERC regulated public utility if it is a "public
            utility" as defined in Section 201(e) of the Federal Power Act, 16
            U.S.C. Section 824(e).

      C-3.7 Except as provided for in Section C-3.6, the price shall not exceed
            the Seller's forecasted Incremental Cost plus up to: $7.32/kW/month;
            $1.68/kW/week; 33.78(cent)/kW/day; 14.07 mills/kWh; or 21.11
            mills/kWh for service of sixteen (16) hours or less per day. The
            hourly rate is capped at the Seller's forecasted Incremental Cost
            plus 33.78(cent)/kW/day. The total demand charge revenues in any
            consecutive seven-day period shall not exceed the product of the
            weekly rate and the

Issued by:  Michael E. Small, General Counsel to  Effective:  February 1, 2001
                  Western Systems Power Pool
Issued on:  December 1, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                          First Revised Sheet No. 89
Rate Schedule FERC No. 6                     Superseding Original Sheet No. 89

            highest demand experienced on any day in the seven-day period.
            Exchange ratios among such Parties shall be as mutually agreed
            between the Purchaser and the Seller, but shall not exceed the ratio
            of 1.5 to 1.0. The Seller's forecasted Incremental Cost discussed
            above also may include any transmission and/or ancillary service
            costs associated with the sale, including the cost of any
            transmission and/or ancillary services that the Seller must take on
            its own system. Any such transmission and/or ancillary service
            charges shall be separately identified by the Seller to the
            Purchaser for transactions under this Schedule including exchanges.
            The transmission and ancillary service rate ceiling shall be
            available through the WSPP's Hub or homepage. Any such transmission
            service (and ancillary services provided in conjunction with such
            transmission service) by Seller shall be provided pursuant to any
            applicable transmission tariff or agreement, and the rates therefore
            shall be consistent with such tariff or agreement.

      C-3.8 Firm Capacity/Energy Sale or Exchange Service shall be interruptible
            only if the interruption is: (a) within the recall time or allowed
            by other applicable provisions governing interruptions of service
            under this Service Schedule mutually agreed to by the Seller and the
            Purchaser, (b) due to an Uncontrollable Force as provided in Section
            10 of this Agreement; or (c) where applicable, to meet Seller's
            public utility or statutory obligations to its customers. If service
            under this Service Schedule is interrupted under Section C-3.8(a) or
            (b), neither Seller nor Purchaser shall be obligated to pay any
            damages under this Agreement or Confirmation Agreement. If service
            under this Service Schedule is interrupted for any reason

Issued by:  Michael E. Small, General Counsel to   Effective: February 1, 2001
                  Western Systems Power Pool
Issued on:  December 1, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                              Original Sheet No. 89A
Rate Schedule FERC No. 6

            other than pursuant to Section C-3.8(a) or (b), the Non-Performing
            Party shall be responsible for payment of damages as provided in
            Section 21.3 of this Agreement or in any Confirmation.

Issued by:  Michael E. Small, General Counsel to   Effective: February 1, 2001
                  Western Systems Power Pool
Issued on:  December 1, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                          First Revised Sheet No. 90
Rate Schedule FERC No. 6                     Superseding Original Sheet No. 90

      C-3.9 Each Party that is a FERC regulated public utility as defined in
            Section C-3.6 shall file the Confirmation Agreement with FERC for
            each transaction under this Service Schedule with a term in excess
            of one year no later than 30 days after service begins if that Party
            would have been required to file such Confirmation Agreements or
            similar agreements with FERC under an applicable FERC accepted
            market based rate schedule.

     C-3.10 Seller shall be responsible for ensuring that Service Schedule C
            transactions are scheduled as firm power consistent with the most
            recent rules adopted by the applicable NERC regional reliability
            council.

Wspp/WSPP Agreement 12-12 edits nonredlined version

Issued by:  Michael E. Small, General Counsel to   Effective: February 1, 2001
                  Western Systems Power Pool
Issued on:  December 1, 2000
Filed to comply with order of the Federal Energy Regulatory Commission,
Docket Nos. ER00-3338, et al., issued September 15, 2000.
<PAGE>
Western Systems Power Pool                          First Revised Sheet No. 91
Rate Schedule FERC No. 6                     Superseding Original Sheet No. 91

                                 LIST OF MEMBERS

ACN Power, Inc.
AES NewEnergy, Inc.
Allegheny Energy Supply Co., LLC
Amerada Hess Corporation
Ameren Energy Generating Company
American Electric Power Service Corporation as agent for Ohio Power Company,
   Public Service Company of Oklahoma and Southwestern Electric Power Company
APS Energy Services Company, Inc.
Aquila Energy Marketing Corporation
Arizona Electric Power Co.
Arizona Public Service Co.
Arkansas Electric Coop. Corp.
Associated Electric Cooperative, Inc.
Astra Oil Company, Inc.
Avista Corporation
Avista Energy, Inc.
Basin Electric Power Cooperative
Benton Public Utility District No. 1 of Benton County
Blackhills Power & Light Company
Bonneville Power Adm.
BP Energy Company
Burbank, City of
Calif. Dept. of Water Resources
Calpine Energy Services, L.P.
Candela Energy Corporation
Cargill-Alliant, LLC
Carolina Power & Light Company
Cheyenne Light, Fuel and Power Co.
Cinergy Capital & Trading, Inc.
Cinergy Operating Companies
City of Anaheim, Public Utilities Dept.
City of Azusa
City of Banning
City of Glendale Water & Power Dept.
City of Independence
City of Klamath Falls
City of Palo Alto
City of Riverside, California
City of Santa Clara Electric Department
City of Sikeston, Board of Municipal Utilities
City Utilities of Springfield, Missouri
City Water & Light (Jonesboro, AR)
Clatskanie PUD
Cleco Marketing & Trading LLC
Cleco Power LLC
CMS Marketing, Services and Trading Company
CNG Power Services Corp.
Colorado River Commission of Nevada
Colorado Springs Utilities
Colton, City of
Columbia Energy Power Marketing
Columbia Power Corporation
Cominco, Ltd.
Commonwealth Energy Corporation
ConAgra Energy Services, Inc.
Conectiv Energy Supply, Inc.
Conoco Gas & Power Marketing - a division of Conoco Inc.
Constellation Power Source
Cook Inlet Energy Supply
Coral Power, L.L.C.
Deseret G&T
DTE Energy Trading, Inc.
Duke Energy Trading & Marketing, LLC
Duke Power
Duke Solutions, Inc.
Duke/Louis Dreyfuss, LLC
Dynegy Power Marketing, Inc.
Dynegy Power Services, Inc.
E prime
Edison Mission Marketing & Trading, Inc.
Edison Source
Edmonton Power Authority, Alberta
El Paso Electric
El Paso Merchant Energy, L.P.
Empire District Electric Co.
Energy Transfer Group, LLC
EnerZ Corporation

Issued by:  Michael E. Small, General Counsel to       Effective:  March 1, 2002
         Western Systems Power Pool

Issued on: December 21, 2001
<PAGE>
Western Systems Power Pool                          First Revised Sheet No. 92
Rate Schedule FERC No. 6                     Superseding Original Sheet No. 92

Engage Energy America LLC
Engelhard Power Marketing, Inc.
ENMAX Energy Corporation
ENMAX Energy Marketing Inc.
Enron Power Marketing, Inc.
Enserco Energy Inc.
Entergy Arkansas, Inc.
Entergy Gulf States, Inc.
Entergy Louisiana, Inc.
Entergy Mississippi, Inc.
Entergy New Orleans, Inc.
Entergy Power, Inc.
Entergy Services, Inc. as agent for the Entergy Operating Companies
Entergy-Koch Trading, LP
Equitable Power Services Co.
Eugene Water & Electric Board
Exelon Generation Company, LLC
Farmington, City of
Federal Energy Sales, Inc.
FPL Energy Power Marketing Inc.
Golden Spread Electric Cooperative
Grand River Dam Authority
Hafslund Energy Trading, LLC
Hetch-Hetchy Water & Power
Hinson Power Co., LLC
Howard Energy Co., Inc.
IDACORP Energy L.P.
Idaho Power Company
IGI Resources, Inc.
Illinova Energy Partners, Inc.
Imperial Irrigation District
Industrial Energy Applications, Inc.
InterCoast Power Marketing
J. Aron & Company
KAMO Electric Cooperative, Inc.
Kansas City Board of Public Utilities
Kansas City Power & Light
KN Energy Marketing
Lafayette Utilities System
LG&E Energy Marketing Inc.
Lincoln Electric System
Los Alamos County
Los Angeles Dept. of Water & Power
Louisiana Generating LLC
Louisville Gas & Electric Company
Maclaren Energy Inc.
Mason County PUD No. 3
McMinnville Water & Light
Merchant Energy Group of the Americas, Inc.
Merrill Lynch Capital Services, Inc.
Metropolitan Water District
MidAmerican Energy Company
MidCon Power Services Corp.
MIECO, Inc.
Minnesota Power, Inc.
Mirant Americas Energy Marketing, LP
Missouri Joint Municipal Electric Utility Comm.
Modesto Irrigation District
Morgan Stanley Capital Group, Inc.
M-S-R Public Power Agency
Municipal Energy Agency of Mississippi
Municipal Energy Agency of Nebraska
Nebraska Public Power District
Nevada Power Co.
New West Energy
NorthPoint Energy Solutions Inc.
Northern California Power Agency
Northern States Power Company
NP Energy Inc.
NRG Power Marketing Inc.
OGE Energy Resources, Inc.
Oklahoma Gas & Electric
Oklahoma Municipal Power Authority
Omaha Public Power District
ONEOK Power Marketing Company
Otter Tail Power Company
Pacific Gas & Electric Co.
Pacific Northwest Generating Coop.
PacifiCorp
PacifiCorp Power Marketing, Inc.
PanCanadian Energy Services
Pasadena, City of
PG&E Energy Services
PG&E Energy Trading - Power, L.P.
PG&E Power Services Company

Issued by: Michael E. Small, General Counsel to        Effective:  March 1, 2002
         Western Systems Power Pool

Issued on: December 21, 2001
<PAGE>
Western Systems Power Pool                          Sixth Revised Sheet No. 93
Rate Schedule FERC No. 6                        Superseding Fifth Sheet No. 93

Phibro Inc.
Pinnacle West Capital Corporation
Plains Elec. Gen. & Trans. Coop. Inc.
Platte River Power Authority
Portland General Electric Co.
Power Exchange Corporation
Powerex
PPL Electric Utilities Corporation
PPL EnergyPlus, LLC
PPL Montana, LLC
Public Service Co. of NM
Public Service Co. of Colorado
Public Util. Dist. No. 1 of Douglas Cty.
Public Util. Dist. No. 1 of Franklin Cty.
PUD No. 1 of Chelan County
PUD No. 1 of Grays Harbor County
PUD No. 1 of Snohomish County
PUD No. 2 of Grant County
Puget Sound Energy
QST Energy Trading Inc.
Questar Energy Trading
Rainbow Energy Marketing Corporation
Redding, City of
Reliant Energy Services, Inc.
Rocky Mountain Generation Coop., Inc.
Roseville Electric
Sacramento Municipal Utility District
Salt River Project
San Diego Gas & Electric Co.
Seattle City Light
Sempra Energy Resources
Sempra Energy Solutions
Sempra Energy Trading Corp.
Sierra Pacific Power Co.
Southern Calif. Edison Co.
Southern California Water Company
Southern Company Services, Inc.
Southern Illinois Power Cooperative
Southwest Power Administration
Southwestern Public Service
Split Rock Energy LLC
Statoil Energy Trading, Inc.
Strategic Energy LLC
Sunflower Electric Power Corp.
Tacoma Power
Tenaska Power Services Co.
Tennessee Valley Authority
Texaco Energy Services
Texas-New Mexico Power Company
The Detroit Edison Co.
The Energy Authority
The Montana Power Company
The Power Company of America, LP
Tractebel Energy Marketing, Inc.
TransAlta Energy Marketing (US) Inc.
TransCanada Power, div. of TransCanada Energy Ltd.
Tri-State Generation and Transmission Assoc.
Tucson Electric Power
Turlock Irrigation District
TXU Energy Trading Company
Union Electric Company
Utah Associated Municipal Power Systems
UtiliCorp United
Vastar Power Marketing, Inc.
Vernon, City of
VIASYN, Inc.
Virginia Electric and Power Company
Vitol Gas & Electric LLC
WAPA-Colorado River Storage Project Management Center WAPA-Desert Southwest
Region WAPA-Rocky Mountain Region WAPA-Upper Great Plains Region WAPA-Sierra
Nevada Region West Kootenay Power Ltd.
Western Farmers Electric Co-op
Western Power Services, Inc.
Western Resources, Inc.
Williams Energy Marketing & Trading Co.
WPS Energy Services, Inc.
XCEL Energy Services, Inc.

Issued by: Michael E. Small, General Counsel to         Effective: March 1, 2002
         Western Systems Power Pool

Issued on: December 21, 2001

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