Document:

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                                                                   Exhibit 10.19

                                                          APS CONTRACT NO. 85326

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                                  Master Power

                                 Purchase & Sale

                                    Agreement

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(EDISON ELECTRIC INSTITUTE LOGO)                                          (SEAL)

                         Version 2.1 (modified 4/25/00)
             (C)COPYRIGHT 2000 by the Edison Electric Institute and
                      National Energy Marketers Association

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                    MASTER POWER PURCHASE AND SALES AGREEMENT

                                TABLE OF CONTENTS
<TABLE>
<S>                                                                           <C>
COVER SHEET................................................................    1
GENERAL TERMS AND CONDITIONS...............................................   16
ARTICLE ONE:     GENERAL DEFINITIONS.......................................   21
ARTICLE TWO:     TRANSACTION TERMS AND CONDITIONS..........................   21
   2.1     Transactions....................................................   21
   2.2     Governing Terms.................................................   21
   2.3     Confirmation....................................................   21
   2.4     Additional Confirmation Terms...................................   22
   2.5     Recording.......................................................   22
ARTICLE THREE:   OBLIGATIONS AND DELIVERIES................................   22
   3.1     Seller's and Buyer's Obligations................................   22
   3.2     Transmission and Scheduling.....................................   22
   3.3     Force Majeure...................................................   23
ARTICLE FOUR:    REMEDIES FOR FAILURE TO DELIVER/RECEIVE...................   23
   4.1     Seller's Failure................................................   23
   4.2     Buyer's Failure.................................................   23
ARTICLE FIVE:    EVENTS OF DEFAULT; REMEDIES...............................   23
   5.1     Events of Default...............................................   23
   5.2     Declaration of an Early Termination Date and Calculation of
           Settlement Amounts..............................................   25
   5.3     Net Out of Settlement Amounts...................................   25
   5.4     Notice of Payment of Termination Payment........................   25
   5.5     Disputes With Respect to Termination Payment....................   25
   5.6     Closeout Setoffs................................................   26
   5.7     Suspension of Performance.......................................   26
ARTICLE SIX:     PAYMENT AND NETTING.......................................   26
   6.1     Billing Period..................................................   26
   6.2     Timeliness of Payment...........................................   27
   6.3     Disputes and Adjustments of Invoices............................   27
   6,4     Netting of Payments.............................................   27
   6.5     Payment Obligation Absent Netting...............................   27
   6.6     Security........................................................   27
   6.7     Payment for Options.............................................   28
   6.8     Transaction Netting.............................................   28
ARTICLE SEVEN:   LIMITATIONS...............................................   28
   7.1     Limitation of Remedies, Liability and Damages...................   28
ARTICLE EIGHT:   CREDIT AND COLLATERAL REQUIREMENTS........................   29
   8.1     Party A Credit Protection.......................................   29
</TABLE>

                                       -i-                     HOUSTON 1847547/2

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<TABLE>
<S>                                                                           <C>
   8.2     Party B Credit Protection.......................................   31
   8.3     Grant of Security Interest/Remedies.............................   33
ARTICLE NINE: GOVERNMENTAL CHARGES.........................................   33
   9.1     COOPERATION.....................................................   33
   9.2     GOVERNMENTAL CHARGES............................................   33
ARTICLE TEN: MISCELLANEOUS.................................................   34
   10.1    Term of Master Agreement........................................   34
   10.2    Representations and Warranties..................................   34
   10.3    Title and Risk of Loss..........................................   35
   10.4    Indemnity.......................................................   35
   10.5    Assignment......................................................   36
   10.6    Governing Law...................................................   36
   10.7    Notices.........................................................   36
   10.8    General.........................................................   36
   10.9    Audit...........................................................   37
   10.10   Forward Contract................................................   37
   10.11   Confidentiality.................................................   37
SCHEDULE M:      GOVERNMENTAL ENTITY OR PUBLIC POWER SYSTEMS...............   38
SCHEDULE P:      PRODUCTS AND RELATED DEFINITIONS..........................   42
EXHIBIT A:       CONFIRMATION LETTER.......................................   49
</TABLE>

                                      -ii-                     HOUSTON 1847547/2

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                    MASTER POWER PURCHASE AND SALE AGREEMENT

                                   COVER SHEET

This Master Power Purchase and Sale Agreement (Version 2.1; modified 04/25/00)
("Master Agreement") is made as of the following date: September 6, 2005
("Effective Date"). The Master Agreement, together with the exhibits, schedules
and any written supplements hereto, the Party A Tariff, if any, the Party B
Tariff, if any, any designated collateral, credit support or margin agreement or
similar arrangement between the Parties and all Transactions (including any
confirmations accepted in accordance with Section 2.3 hereto) shall be referred
to as the "Agreement." The parties to this Master Agreement are the following:

<TABLE>
<S>                                                    <C>
Name ARIZONA PUBLIC SERVICE COMPANY, a                 Name SNOWFLAKE WHITE MOUNTAIN
Corporation organized under the laws of the State of   POWER, LLC, a limited liability company
Arizona ("APS" or "Party A")                           organized under the laws of the State of Arizona
                                                       ("Counterparty" or "Party B")

All Notices:                                           All Notices:

Street: 400 North 5th Street                           Street 3514 East Presido Circle

City: Phoenix, Arizona Zip: 85004                      City: Mesa, Arizona Zip: 85215

Attn: Contracts Department                             Attn: Contract Administration
Phone: (602) 250-2780                                  Phone: (480) 505-1085
Facsimile: (602) 250-3199                              Facsimile: (480) 718-7977
Duns: 00-690-1995                                      Duns: _____________________________
Federal Tax ID Number: 86-0011170                      Federal Tax ID Number: 20-3058773

INVOICES:                                              INVOICES:
   Attn: Energy Settlements                               Attn: Robert M. Worsley
   Phone: (602) 250-3150                                  Phone: (480) 505-1085
   Facsimile: (602) 250-2325                              Facsimile: (480) 718-7922

SCHEDULING:                                            SCHEDULING:
   Attn: N/A                                              Attn: Robert M. Worsley
   Phone: (602) 250-4601                                  Phone:(480) 505-1085
   Facsimile: (602) 250-3199                              Facsimile: (480) 718-7922

PAYMENTS:                                              PAYMENTS:
   Attn: Energy Settlements                               Attn: Robert M. Worsley
   Phone: (602) 250-3150                                  Phone:(480) 505-1085
   Facsimile: (602) 250-2325                              Facsimile: (480) 718-7922

WIRE TRANSFER:                                         WIRE TRANSFER:
   BNK: Wells Fargo Bank                                  BNK: Comercia Bank
   ABA: 121 000 248                                       ABA: 121 137 522
   ACCT: 415 954 0921                                     ACCT: 189 230 2876

CREDIT AND COLLECTIONS:                                CREDIT AND COLLECTIONS:
   Attn: Credit Risk Manager                              Attn: Robert M. Worsley
   Phone: (602) 250-3256                                  Phone: (480) 505-1085
   Facsimile: (602) 250-2325                              Facsimile: (480) 718-7922

With additional Notices of an Event of Default or      With additional Notices of an Event of Default or
Potential Event of Default to:                         Potential Event of Default to:
   Attn: Law Department, Mail Station 8695                Attn: Paul Ellsworth or Greg Knight
   Phone: (602) 250-2052                                  Phone:(480) 641-0008
   Facsimile: (602) 250-2663                              Facsimile: (480) 830-3890
</TABLE>

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<TABLE>
<S> <C>
The Parties hereby agree that the General Terms and Conditions arc incorporated herein, and to the following
provisions as provided for in the General Terms and Conditions:

Party A Tariff FERC Electric Tariff, Fifth Revised Volume No. 3/Dated June 20, 2000/Docket Number ER00-2268-000

Party B Tariff Tariff __________ Dated __________ Docket Number ____________________

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ARTICLE TWO

Transaction Terms and Conditions   [X] Optional provision in Section 2.4. If not checked, inapplicable.

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ARTICLE FOUR

Remedies for Failure               [X] Accelerated Payment of Damages. If not checked, inapplicable.
to Deliver or Receive

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ARTICLE FIVE

Events of Default; Remedies        [ ] Cross Default for Party A:

                                   [ ] Party A: ______________________   Cross Default Amount $_______

                                   [ ] Other Entity: _________________   Cross Default Amount $_______

                                   [ ] Cross Default for Party B:

                                   [ ] Party B: ______________________   Cross Default Amount $_______.

                                   [ ] Other Entity: _________________   Cross Default Amount $_______.

                                   5.6 Closeout Setoff

                                       [ ] Option A (Applicable if no other selection is made.)

                                       [ ] Option B - Affiliates shall have the meaning set forth in the
                                           Agreement unless otherwise specified as follows:

                                       [X] Option C (No Setoff)

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ARTICLE 8                          8.1 Party A Credit Protection:

Credit and Collateral Requirements     (a) Financial Information:

                                           [ ] Option A:

                                           [ ] Option B Specify: ___________________________

                                           [X] Option C Specify: None.

                                       (b) Credit Assurances:

                                           [X] Not Applicable

                                           [ ] Applicable
</TABLE>

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<TABLE>
<S> <C>

                                       (c) Collateral Threshold:

                                           [X] Not Applicable

                                           [ ] Applicable

                                       Party B Collateral Threshold: N/A

                                       Party B Independent Amount: N/A

                                       Party B Transfer Amount: N/A

                                       Party B Rounding Amount: N/A

                                       (d) Downgrade Event

                                           [X] Not Applicable

                                           [ ] Applicable

                                       If applicable, complete the following:

                                           [ ] It shall be a Downgrade Event for Party B if Party B's Credit
                                               Rating falls below ________ from S&P and _____ from Moody's or if
                                               Party B is not rated by either S&P or Moody's.

                                           [ ] Other

                                               Specify: _______________________________________________.

                                       (e) Guarantor for Party B: N/A

                                       Guarantee Amount: N/A

                                       8.2 Party B Credit Protection:

                                       (a) Financial Information:

                                           [X] Option A

                                           [ ] Option B Specify: ______________

                                           [ ] Option C Specify: ______________

                                       (b) Credit Assurances:

                                           [X] Not Applicable

                                           [ ] Applicable

                                       (c) Collateral Threshold:

                                           [X] Not Applicable

                                               Applicable

                                   Party A Collateral Threshold: N/A

                                   Party A Independent Amount: N/A

                                   Party A Transfer Amount: N/A
</TABLE>

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<TABLE>
<S> <C>
                                   Party A Rounding Amount: N/A

                                   (d) Downgrade Event:

                                       [X] Not Applicable

                                       [ ] Applicable

                                   If applicable, complete the following:

                                       [ ] It shall be a Downgrade Event for Party A if Party A's Credit
                                           Rating falls below ________ from S&P and ________ from Moody's or if
                                           Party A is not rated by either S&P or Moody's.

                                       [ ] Other:

                                           Specify: _________________________________________________.

                                   (e) Guarantor for Party A: N/A

                                       Guarantee Amount: N/A

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ARTICLE 10

Confidentiality                    [X] Confidentiality Applicable        If not checked, inapplicable.

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SCHEDULE M

                                   [ ] Party A is a Governmental Entity or Public Power System

                                   [ ] Party B is a Governmental Entity or Public Power System

                                   [ ] Add Section 3.6. If not checked, inapplicable

                                   [ ] Add Section 8.6. If not checked, inapplicable

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OTHER CHANGES                      THE FOLLOWING CHANGES SHALL BE APPLICABLE:
</TABLE>

ARTICLE ONE - GENERAL DEFINITIONS

SECTION 1.1: is amended to include "or a governmental entity" after the word
"individual."

SECTION 1.3: is amended in its entirety to read as follows:

"Bankrupt" means, with respect to a Party, that such Party (i) is dissolved
(other than pursuant to a consolidation, amalgamation or merger); (ii) becomes
insolvent or is unable to pay its debts or fails or admits in writing its
inability generally to pay its debts as they become due; (iii) makes a general
assignment, arrangement or composition with or for the benefit of its creditors;
(iv) institutes or has instituted against it a proceeding seeking a judgment of
insolvency or bankruptcy or any other relief under any bankruptcy or insolvency
law or other similar law affecting creditors' rights, or a petition is presented
for its winding-up or liquidation, and, in the

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case of any such proceeding or petition instituted or presented against it, such
proceeding or petition (a) results in a judgment of insolvency or bankruptcy or
the entry of an order for relief or the making of an order for its winding-up or
liquidation or (b) is not dismissed, discharged, stayed or restrained, in each
case within thirty (30) days of the institution or presentation thereof; (v) has
a resolution passed for its winding-up, official management or liquidation
(other than pursuant to a consolidation, amalgamation or merger); (vi) seeks or
becomes subject to the appointment of an administrator, provisional liquidator,
conservator, receiver, trustee, custodian or other similar official for it or
for all or substantially all its assets; (vii) has a secured party take
possession of all or substantially all its assets or has a distress, execution,
attachment, sequestration or other legal process levied, enforced or sued on or
against all or substantially all its assets and such secured party maintains
possession, or any such process is not dismissed, discharged, stayed or
restrained, in each case within 30 days thereafter; (viii) causes or is subject
to any event with respect to it which, under the applicable laws of any
jurisdiction, has an analogous effect to any of the events specified in clauses
(i) to (vii) (inclusive); or (ix) takes any action in furtherance of, or
indicating its consent to, approval of, or acquiescence in, any of the foregoing
acts. "

SECTION 1.4: is amended by adding the following after "holiday" in the second
line: "or, if applicable, Canadian bank holiday".

SECTION 1.11: is amended by adding the following after "Party" in the third
line: "after using commercially reasonable efforts to mitigate costs."

SECTION 1.12: is amended by deleting in the fourth line the word "issues" and
replacing it with the word "issuer".

SECTION 1.23: is amended by (i) inserting the following at the end of the first
sentence "; provided, that for purposes of energy deliveries, Environmental
Attributes and operation of the turbines, failure of Seller to obtain adequate
supply; inserting the following at the beginning of the second sentence:
"Notwithstanding the foregoing;" (ii); inserting the following subsections
after subsection (iv): "(v) Seller's failure to obtain the permits for the
Project; or (vi) the inability of such party to obtain the needed funds for the
Project".

SECTION 1.50: is amended by deleting the reference to "Section 2.4" and
replacing it with "Section 2.5".

SECTION 1.51: is deleted in its entirety.

SECTION 1.53: is amended by (i) deleting the phrase "at the Delivery Point" in
the second line, and (ii) deleting the phrase "at Seller's option" in the fifth
line and inserting in its place the following: "absent a sale, assuming a sale
could not have been made in a commercially reasonable manner".

SECTION 1.60: is amended by inserting the words "in writing" immediately
following the words "agreed to".

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SECTION 1.62: The following Section 1.62 is added to Article One as follows:

"1.62 'Merger Event' means, with respect to a Party, that such Party
consolidates or amalgamates with, or merges into or with, or transfers
substantially all of its assets to another entity and (i) the resulting entity
fails to assume all of the obligations of such Party hereunder or (ii) the
benefits of any credit support provided pursuant to Article 8 fail to extend to
the performance by such resulting, surviving or transferee entity of its
obligations hereunder or (iii) the resulting entity's credit rating is lower
than that of such Party immediately prior to such action."

SECTION 1.63: The following Section 1.63 is added to Article One as follows:

"1.63 'Environmental Portfolio Standard' or 'EPS' means the Arizona
Environmental Portfolio Standard (R 14-2-1618) adopted by the Arizona
Corporation Commission ('ACC') on February 8, 2001, with Decision No. 63364 and
effective March 31, 2001, wherein regulated utilities in the State are required
to provide a certain percentage of their electricity from Renewable Energy."

SECTION 1.64: The following Section 1.64 is added to Article One as follows:

"1.64 'Environmental Attributes' means environmental characteristics of
Renewable Energy (including energy produced from biomass combustion) which meet
APS' EPS requirements, as they may change from time-to-time, including credits
towards achieving local, national or international renewable portfolio
standards; green tags; Renewable Energy Certificates; greenhouse gas or
emissions reductions or avoidance; actual SO2, NOx, CO2, CO, carbon, VOC,
mercury, and other emissions avoided from equivalent fossil fuel generation; and
any and all other green energy or other environmental benefits associated with
the generation of energy. Such Environmental Attributes shall be expressed in
MWh. Environmental Attributes do not include any energy, capacity, reliability,
or other power attributes used by Seller to provide electricity services nor any
tax credits or tax benefits, associated with Seller's production of Renewable
Energy from the Project."

SECTION 1.65: The following Section 1.65 is added to Article One as follows:

"1.65 Renewable Energy' means electricity supplied by energy sources that are
naturally and continually replenished, such as wind, solar power, geothermal,
hydropower, landfill gas and various other forms of biomass and any other types
of energy not herein mentioned but renewed as used."

SECTION 1.66: The following Section 1.66 shall be added to Article One as
follows:

"1.66 'Renewable Energy Certificate' or 'REC' means: (i) the Environmental
Attributes associated with the generation of power from a renewable energy
source and (ii) the REC reporting rights arising therefrom or connected
therewith. One (1) REC represents the Environmental Attributes and REC reporting
rights associated with one (1) MWh generated from one or more renewable energy
sources."

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SECTION 1.67: The following Section 1.67 is added to Article One as follows:

"1.67 'EWG' means an 'exempt wholesale generator,' as defined by PUHCA."

SECTION 1.68: The following Section 1.68 is added to Article One as follows:

"1.68 'PUHCA' means the Public Utility Holding Company Act of 1935, as amended
from time to time."

SECTION 1.69 The following Section 1.69 is added to Article One as follows:

"1.69 'Contract Year' means the consecutive twelve-month period commencing at
12:00.01 a.m. PST on the Delivery Commencement Date and each subsequent
anniversary thereof through and including the hour ending 2400 PST on the final
day of each such twelve-month period."

SECTION 1.70 The following Section 1.70 is added to Article One as follows:

"1.70 'MW' means megawatt(s)".

SECTION 1.71 The following Section 1.71 is added to Article One as follows:

"1.71 'MWh' means megawatt hour(s)".

SECTION 1.72 The following Section 1.72 is added to Article One as follows:

"1.72 'PST,' means Pacific Standard Time."

SECTION 1.73 The following Section 1.73 is added to Article One as follows:

"1.73 "Seller Metering Equipment" means the meters used to measure the Contract
Quantity delivered to Buyer at the Delivery Point."

ARTICLE TWO - TRANSACTION TERMS AND CONDITIONS

SECTION 2.1: is amended by deleting the phrase in the second line "orally or, if
expressly required by either Party with respect to a particular Transaction,".

SECTION 2.6: A new Section 2.6 is added to Article Two, worded as follows:

"2.6 No Oral Agreements or Modifications. Notwithstanding any thing to the
contrary in this Agreement, including in this Article Two, no Transaction or
other binding commitment between the Parties shall be entered into unless such
Transaction or commitment is in writing, including through electronic
communication, and signed by from Parties, and this Agreement and any and all
Transactions may not be orally amended or modified, including by Recording
pursuant to Section 2.5."

                                        7

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ARTICLE THREE - OBLIGATIONS AND DELIVERIES

SECTION 3.1: is amended by (i) placing a period after "Contract Price" in the
fourth line and deleting"; provided, however, with respect to Options, the
obligations set forth in the preceding sentence shall only arise if the Option
Buyer exercises its Option in accordance with its terms."

SECTION 3.4: A new Section 3.4 is added to Article Three, worded as follows:

"3.4 Regulatory Approval Provisions. The obligation of APS to make any purchases
or related payments pursuant to the Agreement is subject to the timely
fulfillment, as determined by APS in its sole discretion, of the following
regulatory conditions:

All consents and approvals of any governmental authorities including, without
limitation, the ACC, required for the consummation of the transaction(s)
contemplated pursuant to this Agreement shall have become Final Orders, with
such terms and conditions as shall have been imposed by the governmental
authority issuing such Final Order acceptable in all respects to APS in its sole
discretion, including the issuance by the ACC of one or more orders which shall
have become a Final Order (i) approving the Agreement in its entirety and the
regulatory treatment of APS' purchases through the Agreement, including,
without limitation, but subject to ACC review of APS' administration of the
Agreement, and (ii) finding that any procurement pursuant to the Agreement is
procurement of Renewable Energy, for purposes of determining APS' compliance
with any obligation to increase its total procurement of Renewable Energy that
it may have pursuant to the Environmental Portfolio Standard. As used herein,
"Final Order" means an action by a governmental authority as to which: (a) no
request for stay of the action is pending, no such stay is in effect and if any
time period is permitted by statute or regulation for filing any request for
such stay, such time period has passed; (b) no petition for rehearing,
reconsideration or application for review of the action is pending and the time
for filing any such petition or application has passed; (c) such governmental
authority does not have the action under reconsideration or subject to rehearing
on its own motion or otherwise and the time in which such reconsideration or
rehearing is permitted has passed; and (d) no appeal to a court, or a request
for stay by a court of the governmental authority's action is pending or in
effect and the deadline for filing any such appeal or request has passed."

ARTICLE FOUR - REMEDIES FOR FAILURE TO DELIVER OR RECEIVE

SECTION 4.1: is amended by deleting it in its entirety and replacing it with the
following paragraph:

"4.1 "Seller Failure. In the event Seller fails to deliver to Buyer any of the
Contract Quantity of the Product to the Delivery Point and/or any relating REC's
to which Buyer is entitled under the terms of the Transaction, and such failure
is not excused under the terms of the Transaction or by Buyer's failure to
perform, then Seller shall pay Buyer, on the date payment would otherwise be due
in respect of the delivery period in which the failure occurred or, if
"Accelerated Payment of Damages" is specified on the Cover Sheet, within five
(5) Business

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<PAGE>

Days of invoice receipt, an amount for such damages which shall be calculated
twice a year as detailed in the Transaction Confirmation."

SECTION 4.2: is amended by deleting the portion thereof beginning with "If
Buyer" and ending with "the terms of the Product or" and replacing it with the
following:

"If Buyer fails to schedule and/or accept all or part of any Contract Quantity
of the Product delivered by Seller to the Delivery Point and such failure is not
excused"

SECTION 4.3: A new Section 4.3 is added to Article Four, worded as follows:

"4.3 Suspension of Performance. Notwithstanding, and in addition to the remedies
provided pursuant to Sections 4.1, 4.2 and 5.7, if Seller or Buyer fails to
schedule, deliver or receive all or part of the Product pursuant to a
Transaction for a period of three (3) of more consecutive days, and such failure
is not excused under the terms of this Agreement, by the other Party's failure
to perform or by agreement of the Parties, then upon one (1) Business Day prior
notice, and for so long as the non-performing Party fails to perform, the
performing Party shall have the right to suspend its performance under such
Transaction. In the event the performing Party suspends performance pursuant to
this Section 4.3, it shall not be obligated to resume performance until it has
received notice from the non-performing Party at least one (1) Business Day
prior to the date upon which the non-performing Party intends to resume its
performance; provided that, if the performing Party has entered into a
replacement contract with a term of 31 days or less, the performing Party may
resume performance at the end of the term of such replacement contract. Remedies
available under this provision to the performing Party are in addition to, not
in replacement for, other remedies specified in this Agreement."

ARTICLE FIVE - EVENTS OF DEFAULT; REMEDIES

SECTION 5.1(B): is amended by adding at the end of that paragraph ", if such
failure is not remedied within three (3) Business Days."

SECTION 5.1(F): is amended in its entirety as follows: "a Merger Event occurs
with respect to such Party;"

SECTION 5.1(H)(I): is amended by adding at the end of that paragraph ", if such
failure is not remedied within three (3) Business Days."

SECTION 5.1: is amended by adding a new subsection"(i)" which reads as follows:

"(i) if, during any consecutive ninety (90) day period under any Transaction,
there have occurred five (5) or more "Seller Failures" as that term is used in
Section 4.1, regarding which the Seller shall be deemed to be the Defaulting
Party and regarding which Buyer shall also be entitled to its remedies under
Section 4.1;"

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<PAGE>

SECTION 5.3: is amended by inserting the phrase:

"plus, at the option of the Non-Defaulting Party, any cash or other form of
security then available to the Defaulting Party pursuant to Article Eight,"
between the words "that are due to the Non-Defaulting Party, "and" plus any and
all other amounts" in the sixth line thereof.

ARTICLE SIX - PAYMENT AND NETTING

SECTION 6.1-6.3: are deleted in their entirety and replaced by the following
paragraph:

"6.1 Billing and Payment. On or before the tenth (10th) day of each month during
the Delivery Term, Seller shall prepare and deliver to Buyer an invoice setting
forth: (i) a calculation of the quantity of energy (in MWh) delivered by Seller
to Buyer in the immediately preceding month multiplied by the applicable
Contract Price and (ii) any other payment due and owing from one Party to the
other Party under this Agreement. On or before the twentieth (20th) day
following receipt of such invoice, Buyer shall (i) pay, by wire transfer of
immediately available funds into an account designated by Seller, the full
amount stated in such invoice, or (ii) if Buyer objects to all or a portion of
such invoice, Buyer shall (A) pay the undisputed portion of such invoice by wire
transfer of immediately available funds into an account designed by Seller and
(B) provide an itemized statement of its objections to such invoice setting
forth in reasonable detail the basis for such objections and supporting
documentation therefor. If Buyer does not object to an invoice prior to the date
payment of such invoice is due, Buyer shall pay the full amount of such invoice;
provided however, that Buyer may subsequently object to such invoice and, if
such objection proves to be correct Seller shall refund to Buyer the disputed
amount within ten (10) days of the date of the objection is proven to be
correct. Any amounts due by either Party under this Agreement not paid when due
shall bear interest at the Interest Rate. Such interest shall accrue daily from
the due date until the date upon which such payment is made. Any dispute with
respect to an invoice is waived unless the other Party is notified in accordance
with this Section within twelve (12) months after the invoice is rendered or any
specific adjustment to the invoice is made. If an invoice is not rendered within
twelve (12) months after the close of the month during which performance of a
Transaction occurred, the right to payment for such performance is waived."

SECTION 6.6-6.8: are deleted in their entirety.

SECTION 6.6: A new Section 6.6 shall be added to Section Six as follows:

"6.6 Metering. SWMP shall be responsible, at its sole expense, for providing the
Seller Metering Equipment. SWMP shall be solely responsible for operating,
maintaining, and repairing the Seller Metering Equipment at its own expense
throughout the Term of this Agreement. SWMP shall inspect and test the Seller
Metering Equipment upon its installation and at least once every year at SWMP's
expense. SWMP shall give APS reasonable advance notice of any test, and promptly
provide APS with the results of any such test. APS may observe the test and
conduct its own tests, at APS' expense, to verify SWMP's procedures and results.

                                       10
<PAGE>

     Upon an inaccurate read of the Seller Metering Equipment or if SWMP knows
or should reasonably know of any inaccuracy or material defect in Seller
Metering Equipment, SWMP shall notify APS in writing within forty-eight (48)
hours of such defect. SWMP shall be solely responsible for adjusting, repairing,
replacing or recalibrating such metering device as near as practicable to a
condition of zero error, and for paying any expenses associated with such
adjustment, repair, replacement or recalibration. If a metering device fails to
register or is found upon testing to be inaccurate, an adjustment will be made
correcting all measurements by the inaccurate or defective metering device in
the following manner:

     (a) in the event that an adjustment factor cannot be reliably calculated,
     the Parties shall use the measurements from APS-owned meters if they are
     installed, fully operational and calibrated in accordance with established
     utility practices. If for any reason the measurements cannot be obtained
     from APS-owned meters, the Parties shall use production data from SWMP's
     computer monitoring system to determine the relevant measurements. If
     SWMP's computer monitoring system is found to be inaccurate by more than
     two (2) percent, the Parties shall estimate the amount of the necessary
     adjustment using the site meteorological information for the period of the
     inaccuracy based upon deliveries of electrical Contract Quantity delivered
     to Buyer at the Delivery Point from the Project during periods of similar
     operating conditions when the Seller Metering Equipment was registering
     accurately. The adjustment will be made for the period during which
     inaccurate measurements were made.

     (b) if the Parties cannot agree on the actual period during which the
     inaccurate measurements were made, the period during which the measurements
     are to be adjusted will be the shorter of: (1) the last one-half of the
     period from the last previous test of the metering device to the test that
     found the metering device to be defective or inaccurate; or (2) the 180-day
     period immediately preceding the test that found the metering device to be
     defective or inaccurate.

     (c) upon determination of corrected measurements, the required payment
     adjustment shall be made according to the procedures set forth in Section
     6.3."

ARTICLE TEN - MISCELLANEOUS

SECTION 10.1: is amended by adding "until" between "or" and "such" and deleting
"that" in the penultimate line thereof.

SECTION 10.2: is amended by inserting the words "or will obtain prior to
commencement of deliveries under this Agreement" after "it has" in the first
line of Section 10.2(ii).

SECTION 10.2: The following Section 10.2(xiii) is added to Article Ten:

     "(xiii) Party B represents that all acts necessary to the valid execution,
     delivery and performance of this Agreement and all Transactions thereunder
     has or will be taken and performed as required under Party B's ordinances,
     bylaws, or other regulations including

                                       11

<PAGE>

     but not limited to (i) the valid authority of the person executing this
     Agreement to bind Party B and (ii) the term of any Transaction does not
     extend beyond any applicable limitation imposed by relevant governing
     documents and applicable law,"

SECTION 10.2: The following section 10.2(xiv) shall be added to Article Ten:

     "(xiv) Party B expressly warrants (i) that as of the date hereof the energy
     source from which the energy will be sold to Party A will be Renewable
     Energy and (ii) that it is a qualified entity able to offer Renewable
     Energy and/or Renewable Energy derived credits"

SECTION 10.4: is amended by inserting the phrase "To the extent permitted by
law," at the beginning of each of the first two sentences.

SECTION 10.5: is hereby amended by deleting the text in its entirety and
substituting the following:

"10.5 Assignment. Neither Party shall assign this Agreement, or any Transactions
or rights hereunder, without the prior written consent of the other."

SECTION 10.8: is amended by deleting its penultimate sentence in its entirety
and replacing it with the following sentences: "The indemnity provisions of this
Agreement shall survive the termination of this Agreement for the period of the
applicable statute of limitations. The audit provisions of this Agreement shall
survive the termination of this Agreement for a period of twelve (12) months."

SECTION 10.11: is amended by inserting the following after the word "law" in the
sixth line:

", including as necessary as to the tax treatment and tax structure of the
transaction,"

SECTION 10.12: A new Section 10.12 is added to Article 10 as follows:

"10.12 Venue. Each party hereto irrevocably (i) submits to the exclusive
jurisdiction of the federal and state courts located in the County of Maricopa,
State of Arizona; (ii) waives any objection which it may have to the laying of
venue of any proceedings brought in any such court; (iii) waives any and all
rights to trial by jury with respect to any legal proceeding arising out of or
relating to this Agreement; and (iv) waives any claim that such proceedings have
been brought in an inconvenient forum."

SECTION 10.13: A new Section 10.13 is added to Article 10 as follows:

"10.13 EWG Status. Party B covenants that, so long as during the Term that Party
B is otherwise subject to the requirements of PUHCA and before delivering any
Energy Output to Party A under this Agreement, Party B shall cause Party B to be
an EWG. Party B shall provide Party A with copies of Party B's applications to
FERC for EWG status and for authority to sell

                                       12

<PAGE>

energy under this Agreement within ten (10) days of filing such application(s).
During the Term, Party B shall maintain its EWG status and its authority to sell
power under this Agreement."

SECTION 10.14: A new Section 10.14 is added to Article 10 as follows:

"10.14 Alternative Dispute Resolution. All disputes arising under this Agreement
or the Confirmation of a Transaction are subject to the provisions of this
Section 10.14.

          (a) Mediation. Any disputes between the Parties shall first be
     submitted to a non-binding mediation. The mediation shall be commenced by
     written request of either Party and shall begin within thirty (30) calendar
     days of such written notice. The mediator shall be chosen by mutual
     agreement of the Parties within fifteen (15) calendar days of submission of
     the above written notice. Any discussions or materials presented during or
     for purposes of the mediation shall be confidential and governed by the
     limitations and restrictions of Rule 408 of the Federal and Arizona Rules
     of Evidence and/or any like regulatory rules. The compensation and any
     costs and expenses of the mediation shall be borne equally by the Parties.
     Any arbitration commenced under this Section shall not be initiated until
     following the completion of the mediation detailed herein; provided,
     however, that if a Party refuses to participate in the mediation process as
     provided herein, the other Party may immediately initiate arbitration as
     set forth in this Section 10.14. Any dispute that remains unresolved thirty
     (30) days after the appointment of a mediator shall be settled by binding
     arbitration in accordance with the procedures set forth in this Section
     10.14.

          (b) Arbitration. Any disputes between the Parties and/or their
     respective representatives involving or arising under claim, counterclaim,
     demand, cause of action, dispute, and/or controversy relating to the terms
     of this Agreement, or the breach thereof (collectively 'Claims'), shall be
     submitted to binding arbitration, whether such Claims sound in contract,
     tort or otherwise. The arbitration shall be conducted in accordance with
     the Federal Arbitration Act and the then prevailing Commercial Arbitration
     Rules of the American Arbitration Association. The validity, construction,
     and interpretation of this agreement to arbitrate and all procedural
     aspects of the arbitration conducted pursuant hereto shall be decided by
     the arbitrator(s). Submission shall be made upon the request of either
     Party. Within twenty (20) calendar days of the receipt by the respondent of
     service of the notice of arbitration, the Parties shall select one (1)
     arbitrator by mutual consent. If the Parties are unable to agree upon a
     single arbitrator, there shall be three (3) arbitrators. Specifically, in
     the event the Parties cannot agree upon a single arbitrator, both the
     claimant and the respondent shall appoint one (1) arbitrator within ten
     (10) calendar days after written notice by either Party that three (3)
     arbitrators shall be necessary. The two (2) arbitrators so appointed shall
     then select the third arbitrator within twenty (20) calendar days, who
     shall be the chairperson, of the tribunal. The chairperson shall be a
     person who has over eight (8) years of experience in energy-related
     transactions, and none of the arbitrators shall have been previously
     employed by either Party or have any direct interest in either Party or the
     subject matter of the arbitration, unless such conflict is expressly
     acknowledged and waived in writing by both Parties. The chairperson shall
     be bound to schedule and hear the dispute within six (6) months

                                       13

<PAGE>

     after his/her appointment and shall render the panel's decision within
     thirty (30) calendar days after the hearing concludes. It is agreed that
     the arbitration proceeding shall be conducted in a neutral location
     mutually agreed to by the Parties. It is further agreed that the
     arbitrator(s) shall have no authority to award consequential, treble,
     exemplary, or punitive damages of any type or kind regardless of whether
     such damages may be available under any law or right, with the Parties
     hereby affirmatively waiving their rights, if any, to recover or claim such
     damages. The compensation and any costs and expenses of the arbitrators
     shall be borne equally by the Parties. Any arbitration proceedings,
     decision or award rendered hereunder and the validity, effect and
     interpretation of this arbitration provision shall be governed by the
     Federal Arbitration Act. The award shall be final and binding on the
     Parties and judgment upon any award may be entered in any court of
     competent jurisdiction. The Parties agree that all information exchanged as
     a result of any proceeding as described herein shall be deemed
     confidential.

          (c) Judicial Relief. Either Party may petition a court of appropriate
     jurisdiction, as described in Section 10.12, for non-monetary relief
     relating to any claim of breach of this Agreement in order to prevent undue
     hardship relating to any such claimed breach pending the appointment of an
     arbitration panel as described in this Section 10.14."

SCHEDULE M - GOVERNMENTAL ENTITY OR PUBLIC POWER SYSTEM

Schedule M is not applicable.

SCHEDULE P - PRODUCTS AND RELATED DEFINITIONS

SCHEDULE P: Schedule P is not applicable.

                                       14

<PAGE>

IN WITNESS WHEREOF, the Parties have caused this Master Agreement to be duly
executed as of the date first above written.

ARIZONA PUBLIC SERVICE COMPANY          SNOWFLAKE WHITE MOUNTAIN POWER, LLC
APS or Buyer                            SNWP or Seller

By: /s/ Edward Z. Fox                   By: /s/ Robert M. Worsley
    ---------------------------------       ------------------------------------
Name: Edward Z. Fox                     Name: Robert M. Worsley
Title: Vice President                   Title: President
Date: September 6, 2005                 Date: 9-8-05

DISCLAIMER: THIS MASTER POWER PURCHASE AND SALE AGREEMENT WAS PREPARED BY A
COMMITTEE OF REPRESENTATIVES OF EDISON ELECTRIC INSTITUTE ("EEI") AND NATIONAL
ENERGY MARKETERS ASSOCIATION ("NEM") MEMBER COMPANIES TO FACILITATE ORDERLY
TRADING IN AND DEVELOPMENT OF WHOLESALE POWER MARKETS. NEITHER EEI NOR NEM NOR
ANY MEMBER COMPANY NOR ANY OF THEIR AGENTS, REPRESENTATIVES OR ATTORNEYS SHALL
BE RESPONSIBLE FOR ITS USE, OR ANY DAMAGES RESULTING THEREFROM. BY PROVIDING
THIS AGREEMENT EEI AND NEM DO NOT OFFER LEGAL ADVICE AND ALL USERS ARE URGED TO
CONSULT THEIR OWN LEGAL COUNSEL TO ENSURE THAT THEIR COMMERCIAL OBJECTIVES WILL
BE ACHIEVED AND THEIR LEGAL INTERESTS ARE ADEQUATELY PROTECTED.

[APSC  Contracts Department Stamp]
9/2/05

                                       15

<PAGE>

                          GENERAL TERMS AND CONDITIONS

                        ARTICLE ONE: GENERAL DEFINITIONS

     1.1 "Affiliate" means, with respect to any person, any other person (other
than an individual) that, directly or indirectly, through one or more
intermediaries, controls, or is controlled by, or is under common control with,
such person. For this purpose, "control" means the direct or indirect ownership
of fifty percent (50%) or more of the outstanding capital stock or other equity
interests having ordinary voting power.

     1.2 "Agreement" has the meaning set forth in the Cover Sheet

     1.3 "Bankrupt" means with respect to any entity, such entity (i) files a
petition or otherwise commences, authorizes or acquiesces in the commencement of
a proceeding or cause of action under any bankruptcy, insolvency, reorganization
or similar law, or has any such petition filed or commenced against it, (ii)
makes an assignment or any general arrangement for the benefit of creditors,
(iii) otherwise becomes bankrupt or insolvent (however evidenced), (iv) has a
liquidator, administrator, receiver, trustee, conservator or similar official
appointed with respect to it or any substantial portion of its property or
assets, or (v) is generally unable to pay its debts as they fall due.

     1.4 "Business Day" means any day except a Saturday, Sunday, or a Federal
Reserve Bank holiday. A Business Day shall open at 8:00 a.m. and close at 5.00
p.m. local time for the relevant Party's principal place of business. The
relevant Party, in each instance unless otherwise specified, shall be the Party
from whom the notice, payment or delivery is being sent and by whom the notice
or payment or delivery is to be received.

     1.5 "Buyer" means the Party to a Transaction that is obligated to purchase
and receive, or cause to be received, the Product, as specified in the
Transaction.

     1.6 "Call Option" means an Option entitling, but not obligating, the Option
Buyer to purchase and receive the Product from the Option Seller at a price
equal to the Strike Price for the Delivery Period for which the Option may be
exercised, all as specified in the Transaction. Upon proper exercise of the
Option by the Option Buyer, the Option Seller will be obligated to sell and
deliver the Product for the Delivery Period for which the Option has been
exercised.

     1.7 "Claiming Party" has the meaning set forth in Section 3.3.

     1.8 "Claims" means all third party claims or actions, threatened or filed
and, whether groundless, false, fraudulent or otherwise, that directly or
indirectly relate to the subject matter of an indemnity, and the resulting
losses, damages, expenses, attorneys' fees and court costs, whether incurred by
settlement or otherwise, and whether such claims or actions are threatened or
filed prior to or after the termination of this Agreement.

     1.9 "Confirmation" has the meaning set forth in Section 2.3.

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<PAGE>

     1.10 "Contract Price" means the price in $U.S. (unless otherwise provided
for) to be paid by Buyer to Seller for the purchase of the Product, as specified
in the Transaction.

     1.11 "Costs" means, with respect to the Non-Defaulting Party, brokerage
fees, commissions and other similar third party transaction costs and expenses
reasonably incurred by such Party either in terminating any arrangement pursuant
to which it has hedged its obligations or entering into new arrangements which
replace a Terminated Transaction; and all reasonable attorneys' fees and
expenses incurred by the Non-Defaulting Party in connection with the termination
of a Transaction.

     1.12 "Credit Rating" means, with respect to any entity, the rating then
assigned to such entity's unsecured, senior long-term debt obligations (not
supported by third party credit enhancements) or if such entity does not have a
rating for its senior unsecured long-term debt, then the rating then assigned to
such entity as an issues rating by S&P, Moody's or any other rating agency
agreed by the Parties as set forth in the Cover Sheet.

     1.13 "Cross Default Amount" means the cross default amount, if any, set
forth in the Cover Sheet for a Party.

     1.14 "Defaulting Party" has the meaning set forth in Section 5.1.

     1.15 "Delivery Period" means the period of delivery for a Transaction, as
specified in the Transaction.

     1.16 "Delivery Point" means the point at which the Product will be
delivered and received, as specified in the Transaction.

     1.17 "Downgrade Event" has the meaning set forth on the Cover Sheet.

     1.18 "Early Termination Date" has the meaning set forth in Section 5.2.

     1.19 "Effective Date" has the meaning set forth on the Cover Sheet.

     1.20 "Equitable Defenses" means any bankruptcy, insolvency, reorganization
and other laws affecting creditors' rights generally, and with regard to
equitable remedies, the discretion of the court before which proceedings to
obtain same may be pending.

     1.21 "Event of Default" has the meaning set forth in Section 5.1.

     1.22 "FERC" means the Federal Energy Regulatory Commission or any successor
government agency.

     1.23 "Force Majeure" means an event or circumstance which prevents one
Party from performing its obligations under one or more Transactions, which
event or circumstance was not anticipated as of the date the Transaction was
agreed to, which 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 overcome or avoid or cause to be avoided. Force
Majeure shall not be based on (i) the loss of Buyer's markets; (ii) Buyer's
inability economically

                                       17

<PAGE>

to use or resell the Product purchased hereunder; (iii) the loss or failure of
Seller's supply; or (iv) Seller's ability to sell the Product at a price greater
than the Contract Price. Neither Party may raise a claim of Force Majeure based
in whole or in part on curtailment by a Transmission Provider unless (i) such
Party has contracted for firm transmission with a Transmission Provider for the
Product to be delivered to or received at the Delivery Point and (ii) such
curtailment is due to "force majeure" or "uncontrollable force" or a similar
term as defined under the Transmission Provider's tariff; provided, however,
that existence of the foregoing factors shall not be sufficient to conclusively
or presumptively prove the existence of a Force Majeure absent a showing of
other facts and circumstances which in the aggregate with such factors establish
that a Force Majeure as defined in the first sentence hereof has occurred. The
applicability of Force Majeure to the Transaction is governed by the terms of
the Products and Related Definitions contained in Schedule P.

     1.24 "Gains" means, with respect to any Party, an amount equal to the
present value of the economic benefit to it, if any (exclusive of Costs),
resulting from the termination of a Terminated Transaction, determined in a
commercially reasonable manner.

     1.25 "Guarantor" means, with respect to a Party, the guarantor, if any,
specified for such Party on the Cover Sheet.

     1.26 "Interest Rate" means, for any date, the lesser of (a) the per annum
rate of interest equal to the prime lending rate as may from time to time be
published in The Wall Street Journal under "Money Rates" on such day (or if not
published on such day on the most recent preceding day on which published), plus
two percent (2%) and (b) the maximum rate permitted by applicable law.

     1.27 "Letter(s) of Credit" means one or more irrevocable, transferable
standby letters of credit issued by a U.S. commercial bank or a foreign bank
with a U.S. branch with such bank having a credit rating of at least A- from S&P
or A3 from Moody's, in a form acceptable to the Party in whose favor the letter
of credit is issued. Costs of a Letter of Credit shall be borne by the applicant
for such Letter of Credit

     1.28 "Losses" means, with respect to any Party, an amount equal to the
present value of the economic loss to it, if any (exclusive of Costs), resulting
from termination of a Terminated Transaction, determined in a commercially
reasonable manner.

     1.29 "Master Agreement" has the meaning set forth on the Cover Sheet.

     1.30 "Moody's" means Moody's Investor Services, Inc. or its successor.

     1.31 "NERC Business Day" means any day except a Saturday, Sunday or a
holiday as defined by the North American Electric Reliability Council or any
successor organization thereto. A NERC Business Day shall open at 8:00 a.m. and
close at 5:00 p.m. local time for the relevant Party's principal place of
business. The relevant Party, in each instance unless otherwise specified, shall
be the Party from whom the notice, payment or delivery is being sent and by whom
the notice or payment or delivery is to be received.

     1.32 "Non-Defaulting Party" has the meaning set forth in Section 5.2.

                                       18

<PAGE>

     1.33 "Offsetting Transactions" mean any two or more outstanding
Transactions, having the same or overlapping Delivery Period(s), Delivery Point
and payment date, where under one or more of such Transactions, one Party is the
Seller, and under the other such Transaction(s), the same Party is the Buyer.

     1.34 "Option" means the right but not the obligation to purchase or sell a
Product as specified in a Transaction.

     1.35 "Option Buyer" means the Party specified in a Transaction as the
purchaser of an option, as defined in Schedule P.

     1.36 "Option Seller" means the Party specified in a Transaction as the
seller of an option, as defined in Schedule P.

     1.37 "Party A Collateral Threshold" means the collateral threshold, if any,
set forth in the Cover Sheet for Party A.

     1.38 "Party B Collateral Threshold" means the collateral threshold, if any,
set forth in the Cover Sheet for Party B.

     1.39 "Party A Independent Amount" means the amount, if any, set forth in
the Cover Sheet for Party A.

     1.40 "Party B Independent Amount" means the amount, if any, set forth in
the Cover Sheet for Party B.

     1.41 "Party A Rounding Amount" means the amount, if any, set forth in the
Cover Sheet for Party A.

     1.42 "Party B Rounding Amount" means the amount, if any, set forth in the
Cover Sheet for Party B.

     1.43 "Party A Tariff" means the tariff, if any, specified in the Cover
Sheet for Party A.

     1.44 "Party B Tariff" means the tariff, if any, specified in the Cover
Sheet for Party B.

     1.45 "Performance Assurance" means collateral in the form of either cash,
Letters) of Credit, or other security acceptable to the Requesting Party.

     1.46 "Potential Event of Default" means an event which, with notice or
passage of time or both, would constitute an Event of Default.

     1.47 "Product" means electric capacity, energy or other product(s) related
thereto as specified in a Transaction by reference to a Product listed in
Schedule P hereto or as otherwise specified by the Parties in the Transaction.

     1.48 "Put Option" means an Option entitling, but not obligating, the Option
Buyer to sell and deliver the Product to the Option Seller at a price equal to
the Strike Price for the

                                       19

<PAGE>

Delivery Period for which the option may be exercised, all as specified in a
Transaction. Upon proper exercise of the Option by the Option Buyer, the Option
Seller will be obligated to purchase and receive the Product.

     1.49 "Quantity" means that quantity of the Product that Seller agrees to
make available or sell and deliver, or cause to be delivered, to Buyer, and that
Buyer agrees to purchase and receive, or cause to be received, from Seller as
specified in the Transaction.

     1.50 "Recording" has the meaning set forth in Section 2.4.

     1.51 "Replacement Price" means the price at which Buyer, acting in a
commercially reasonable manner, purchases at the Delivery Point a replacement
for any Product specified in a Transaction but not delivered by Seller, plus (i)
costs reasonably incurred by Buyer in purchasing such substitute Product and
(ii) additional transmission charges, if any, reasonably incurred by Buyer to
the Delivery Point, or at Buyer's option, the market price at the Delivery Point
for such Product not delivered as determined by Buyer in a commercially
reasonable manner; provided, however, in no event shall such price include any
penalties, ratcheted demand or similar charges, nor shall Buyer be required to
utilize or change its utilization of its owned or controlled assets or market
positions to minimize Seller's liability. For the purposes of this definition,
Buyer shall be considered to have purchased replacement Product to the extent
Buyer shall have entered into one or more arrangements in a commercially
reasonable manner whereby Buyer repurchases its obligation to sell and deliver
the Product to another party at the Delivery Point.

     1.52 "S&P" means the Standard & Poor's Rating Group (a division of
McGraw-Hill, Inc.) or its successor.

     1.53 "Sales Price" means the price at which Seller, acting in a
commercially reasonable manner, resells at the Delivery Point any Product not
received by Buyer, deducting from such proceeds any (i) costs reasonably
incurred by Seller in reselling such Product and (ii) additional transmission
charges, if any, reasonably incurred by Seller in delivering such Product to the
third party purchasers, or at Seller's option, the market price at the Delivery
Point for such Product not received as determined by Seller in a commercially
reasonable manner; provided, however, in no event shall such price include any
penalties, ratcheted demand or similar charges, nor shall Seller be required to
utilize or change its utilization of its owned or controlled assets, including
contractual assets, or market positions to minimize Buyer's liability. For
purposes of this definition, Seller shall be considered to have resold such
Product to the extent Seller shall have entered into one or more arrangements in
a commercially reasonable manner whereby Seller repurchases its obligation to
purchase and receive the Product from another party at the Delivery Point.

     1.54 "Schedule" or "Scheduling" means the actions of Seller, Buyer and/or
their designated representatives, including each Party's Transmission Providers,
if applicable, of notifying, requesting and confirming to each other the
quantity and type of Product to be delivered on any given day or days during the
Delivery Period at a specified Delivery Point.

     1.55 "Seller" means the Party to a Transaction that is obligated to sell
and deliver, or cause to be delivered, the Product, as specified in the
Transaction.

                                       20

<PAGE>

     1.56 "Settlement Amount" means, with respect to a Transaction and the Non-
Defaulting Party, the Losses or Gains, and Costs, expressed in U.S. Dollars,
which such party incurs as a result of the liquidation of a Terminated
Transaction pursuant to Section 5.2.

     1.57 "Strike Price" means the price to be paid for the purchase of the
Product pursuant to an Option.

     1.58 "Terminated Transaction" has the meaning set forth in Section 5.2.

     1.59 "Termination Payment" has the meaning set forth in Section 5.3.

     1.60 "Transaction" means a particular transaction agreed to by the Parties
relating to the sale and purchase of a Product pursuant to this Master
Agreement.

     1.61 "Transmission Provider" means any entity or entities transmitting or
transporting the Product on behalf of Seller or Buyer to or from the Delivery
Point in a particular Transaction.

                  ARTICLE TWO: TRANSACTION TERMS AND CONDITIONS

     2.1 Transactions. A Transaction shall be entered into upon agreement of the
Parties orally or, if expressly required by either Party with respect to a
particular Transaction, in writing, including an electronic means of
communication. Each Party agrees not to contest, or assert any defense to, the
validity or enforceability of the Transaction entered into in accordance with
this Master Agreement (i) based on any law requiring agreements to be in writing
or to be signed by the parties, or (ii) based on any lack of authority of the
Party or any lack of authority of any employee of the Party to enter into a
Transaction.

     2.2 Governing Terms. Unless otherwise specifically agreed, each Transaction
between the Parties shall be governed by this Master Agreement. This Master
Agreement (including all exhibits, schedules and any written supplements
hereto), the Party A Tariff, if any, and the Party B Tariff, if any, any
designated collateral, credit support or margin agreement or similar arrangement
between the Parties and all Transactions (including any Confirmations accepted
in accordance with Section 2.3) shall form a single integrated agreement between
the Parties. Any inconsistency between any terms of this Master Agreement and
any terms of the Transaction shall be resolved in favor of the terms of such
Transaction.

     2.3 Confirmation. Seller may confirm a Transaction by forwarding to Buyer
by facsimile within three (3) Business Days after the Transaction is entered
into a confirmation ("Confirmation") substantially in the form of Exhibit A. If
Buyer objects to any term(s) of such Confirmation, Buyer shall notify Seller in
writing of such objections within two (2) Business Days of Buyer's receipt
thereof, failing which Buyer shall be deemed to have accepted the terms as sent.
If Seller fails to send a Confirmation within three (3) Business Days after the
Transaction is entered into, a Confirmation substantially in the form of Exhibit
A may be forwarded by Buyer to Seller. If Seller objects to any term(s) of such
Confirmation, Seller shall notify Buyer of such objections within two (2)
Business Days of Seller's receipt thereof, failing which Seller shall be deemed
to have accepted the terms as sent. If Seller and Buyer each send a Confirmation
and neither Party objects to the other Party's Confirmation within two (2)
Business Days of receipt, Seller's Confirmation shall be deemed to be accepted
and shall be the

                                       21

<PAGE>

controlling Confirmation, unless (i) Seller's Confirmation was sent more than
three (3) Business Days after the Transaction was entered into and (ii) Buyer's
Confirmation was sent prior to Seller's Confirmation, in which case Buyer's
Confirmation shall be deemed to be accepted and shall be the controlling
Confirmation. Failure by either Party to send or either Party to return an
executed Confirmation or any objection by either Party shall not invalidate the
Transaction agreed to by the Parties.

     2.4 Additional Confirmation Terms. If the Parties have elected on the Cover
Sheet to make this Section 2.4 applicable to this Master Agreement, when a
Confirmation contains provisions, other than those provisions relating to the
commercial terms of the Transaction (e.g., price or special transmission
conditions), which modify or supplement the general terms and conditions of this
Master Agreement (e.g., arbitration provisions or additional representations and
warranties), such provisions shall not be deemed to be accepted pursuant to
Section 2.3 unless agreed to either orally or in writing by the Parties;
provided that the foregoing shall not invalidate any Transaction agreed to by
the Parties.

     2.5 Recording. Unless a Party expressly objects to a Recording (defined
below) at the beginning of a telephone conversation, each Party consents to the
creation of a tape or electronic recording ("Recording") of all telephone
conversations between the Parties to this Master Agreement, and that any such
Recordings will be retained in confidence, secured from improper access, and may
be submitted in evidence in any proceeding or action relating to this Agreement.
Each Party waives any further notice of such monitoring or recording, and agrees
to notify its officers and employees of such monitoring or recording and to
obtain any necessary consent of such officers and employees. The Recording, and
the terms and conditions described therein, if admissible, shall be the
controlling evidence for the Parties' agreement with respect to a particular
Transaction in the event a Confirmation is not fully executed (or deemed
accepted) by both Parties. Upon full execution (or deemed acceptance) of a
Confirmation, such Confirmation shall control in the event of any conflict with
the terms of a Recording, or in the event of any conflict with the terms of this
Master Agreement.

                    ARTICLE THREE: OBLIGATIONS AND DELIVERIES

     3.1 Seller's and Buyer's Obligations. With respect to each Transaction,
Seller shall sell and deliver, or cause to be delivered, and Buyer shall
purchase and receive, or cause to be received, the Quantity of the Product at
the Delivery Point, and Buyer shall pay Seller the Contract Price; provided,
however, with respect to Options, the obligations set forth in the preceding
sentence shall only arise if the Option Buyer exercises its Option in accordance
with its terms. Seller shall be responsible for any costs or charges imposed on
or associated with the Product or its delivery of the Product up to the Delivery
Point. Buyer shall be responsible for any costs or charges imposed on or
associated with the Product or its receipt at and from the Delivery Point.

     3.2 Transmission and Scheduling. Seller shall arrange and be responsible
for transmission service to the Delivery Point and shall Schedule or arrange for
Scheduling services with its Transmission Providers, as specified by the Parties
in the Transaction, or in the absence thereof, in accordance with the practice
of the Transmission Providers, to deliver the Product to the Delivery Point.
Buyer shall arrange and be responsible for transmission service at and from

                                       22

<PAGE>

the Delivery Point and shall Schedule or arrange for Scheduling services with
its Transmission Providers to receive the Product at the Delivery Point

     3.3 Force Majeure. To the extent either Party is prevented by Force Majeure
from carrying out, in whole or part, its obligations under the Transaction and
such Party (the "Claiming Party") gives notice and details of the Force Majeure
to the other Party as soon as practicable, then, unless the terms of the Product
specify otherwise, the Claiming Party shall be excused from the performance of
its obligations with respect to such Transaction (other than the obligation to
make payments then due or becoming due with respect to performance prior to the
Force Majeure). The Claiming Party shall remedy the Force Majeure with all
reasonable dispatch. The non-Claiming Party shall not be required to perform or
resume performance of its obligations to the Claiming Party corresponding to the
obligations of the Claiming Party excused by Force Majeure.

              ARTICLE FOUR: REMEDIES FOR FAILURE TO DELIVER/RECEIVE

     4.1 Seller Failure. If Seller fails to schedule and/or deliver all or part
of the Product pursuant to a Transaction, and such failure is not excused under
the terms of the Product or by Buyer's failure to perform, then Seller shall pay
Buyer, on the date payment would otherwise be due in respect of the month in
which the failure occurred or, if "Accelerated Payment of Damages" is specified
on the Cover Sheet, within five (5) Business Days of invoice receipt, an amount
for such deficiency equal to the positive difference, if any, obtained by
subtracting the Contract Price from the Replacement Price. The invoice for such
amount shall include a written statement explaining in reasonable detail the
calculation of such amount

     4.2 Buyer Failure. If Buyer fails to schedule and/or receive all or part of
the Product pursuant to a Transaction and such failure is not excused under the
terms of the Product or by Seller's failure to perform, then Buyer shall pay
Seller, on the date payment would otherwise be due in respect of the month in
which the failure occurred or, if "Accelerated Payment of Damages" is specified
on the Cover Sheet, within five (5) Business Days of invoice receipt, an amount
for such deficiency equal to the positive difference, if any, obtained by
subtracting the Sales Price from the Contract Price. The invoice for such amount
shall include a written statement explaining in reasonable detail the
calculation of such amount

                    ARTICLE FIVE: EVENTS OF DEFAULT; REMEDIES

     5.1 Events of Default. An "Event of Default" shall mean, with respect to a
Party (a "Defaulting Party"), the occurrence of any of the following:

          (a)  the failure to make, when due, any payment required pursuant to
               this Agreement if such failure is not remedied within three (3)
               Business Days after written notice;

          (b)  any representation or warranty made by such Party herein is false
               or misleading in any material respect when made or when deemed
               made or repeated;

                                       23

<PAGE>

          (c)  the failure to perform any material covenant or obligation set
               forth in this Agreement (except to the extent constituting a
               separate Event of Default, and except for such Party's
               obligations to deliver or receive the Product, the exclusive
               remedy for which is provided in Article Four) if such failure is
               not remedied within three (3) Business Days after written notice;

          (d)  such Party becomes Bankrupt;

          (e)  the failure of such Party to satisfy the creditworthiness/
               collateral requirements agreed to pursuant to Article Eight
               hereof;

          (f)  such Party consolidates or amalgamates with, or merges with or
               into, or transfers all or substantially all of its assets to,
               another entity and, at the time of such consolidation,
               amalgamation, merger or transfer, the resulting, surviving or
               transferee entity fails to assume all the obligations of such
               Party under this Agreement to which it or its predecessor was a
               party by operation of law or pursuant to an agreement reasonably
               satisfactory to the other Party;

          (g)  if the applicable cross default section in the Cover Sheet is
               indicated for such Party, the occurrence and continuation of (i)
               a default, event of default or other similar condition or event
               in respect of such Party or any other party specified in the
               Cover Sheet for such Party under one or more agreements or
               instruments, individually or collectively, relating to
               indebtedness for borrowed money in an aggregate amount of not
               less than the applicable Cross Default Amount (as specified in
               the Cover Sheet), which results in such indebtedness becoming, or
               becoming capable at such time of being declared, immediately due
               and payable or (ii) a default by such Party or any other party
               specified in the Cover Sheet for such Party in making on the due
               date therefor one or more payments, individually or collectively,
               in an aggregate amount of not less than the applicable Cross
               Default Amount (as specified in the Cover Sheet);

          (h)  with respect to such Party's Guarantor, if any:

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

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

               (iii) a Guarantor becomes Bankrupt;

               (iv) the failure of a Guarantor's guaranty to be in full force
                    and effect for purposes of this Agreement (other than in
                    accordance with its

                                       24

<PAGE>

                    terms) prior to the satisfaction of all obligations of such
                    Party under each Transaction to which such guaranty shall
                    relate without the written consent of the other Party; or

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

     5.2 Declaration of an Early Termination Date and Calculation of Settlement
Amounts. If an Event of Default with respect to a Defaulting Party shall have
occurred and be continuing, the other Party (the "Non-Defaulting Party") shall
have the right (i) to designate a day, no earlier than the day such notice is
effective and no later than 20 days after such notice is effective, as an early
termination date ("Early Termination Date") to accelerate all amounts owing
between the Parties and to liquidate and terminate all, but not less than all,
Transactions (each referred to as a "Terminated Transaction") between the
Parties, (ii) withhold any payments due to the Defaulting Party under this
Agreement and (iii) suspend performance. The Non-Defaulting Party shall
calculate, in a commercially reasonable manner, a Settlement Amount for each
such Terminated Transaction as of the Early Termination Date (or, to the extent
that in the reasonable opinion of the Non-Defaulting Party certain of such
Terminated Transactions are commercially impracticable to liquidate and
terminate or may not be liquidated and terminated under applicable law on the
Early Termination Date, as soon thereafter as is reasonably practicable).

     5.3 Net Out of Settlement Amounts. The Non-Defaulting Party shall aggregate
all Settlement Amounts into a single amount by: netting out (a) all Settlement
Amounts that are due to the Defaulting Party, plus, at the option of the
Non-Defaulting Party, any cash or other form of security then available to the
Non-Defaulting Party pursuant to Article Eight, plus any or all other amounts
due to the Defaulting Party under this Agreement against (b) all Settlement
Amounts that are due to the Non-Defaulting Party, plus any or all other amounts
due to the Non- Defaulting Party under this Agreement, so that all such amounts
shall be netted out to a single liquidated amount (the "Termination Payment")
payable by one Party to the other. The Termination Payment shall be due to or
due from the Non-Defaulting Party as appropriate.

     5.4 Notice of Payment of Termination Payment As soon as practicable after a
liquidation, notice shall be given by the Non-Defaulting Party to the Defaulting
Party of the amount of the Termination Payment and whether the Termination
Payment is due to or due from the Non-Defaulting Party. The notice shall include
a written statement explaining in reasonable detail the calculation of such
amount The Termination Payment shall be made by the Party that owes it within
two (2) Business Days after such notice is effective.

     5.5 Disputes With Respect to Termination Payment If the Defaulting Party
disputes the Non-Defaulting Party's calculation of the Termination Payment, in
whole or in part, the Defaulting Party shall, within two (2) Business Days of
receipt of Non-Defaulting Party's calculation of the Termination Payment,
provide to the Non-Defaulting Party a detailed written explanation of the basis
for such dispute; provided, however, that if the Termination Payment is due from
the Defaulting Party, the Defaulting Party shall first transfer Performance
Assurance to the Non-Defaulting Party in an amount equal to the Termination
Payment.

                                       25
<PAGE>

     5.6 Closeout Setoffs.

     Option A: After calculation of a Termination Payment in accordance with
Section 5.3, if the Defaulting Party would be owed the Termination Payment, the
Non-Defaulting Party shall be entitled, at its option and in its discretion, to
(i) set off against such Termination Payment any amounts due and owing by the
Defaulting Party to the Non-Defaulting Party under any other agreements,
instruments or undertakings between the Defaulting Party and the Non-Defaulting
Party and/or (ii) to the extent the Transactions are not yet liquidated in
accordance with Section 5.2, withhold payment of the Termination Payment to the
Defaulting Party. The remedy provided for in this Section shall be without
prejudice and in addition to any right of setoff, combination of accounts, lien
or other right to which any Party is at any time otherwise entitled (whether by
operation of law, contract or otherwise).

     Option B: After calculation of a Termination Payment in accordance with
Section 5.3, if the Defaulting Party would be owed the Termination Payment, the
Non-Defaulting Party shall be entitled, at its option and in its discretion, to
(i) set off against such Termination Payment any amounts due and owing by the
Defaulting Party or any of its Affiliates to the Non-Defaulting Party or any of
its Affiliates under any other agreements, instruments or undertakings between
the Defaulting Party or any of its Affiliates and the Non-Defaulting Party or
any of its Affiliates and/or (ii) to the extent the Transactions are not yet
liquidated in accordance with Section 5.2, withhold payment of the Termination
Payment to the Defaulting Party. The remedy provided for in this Section shall
be without prejudice and in addition to any right of setoff, combination of
accounts, lien or other right to which any Party is at any time otherwise
entitled (whether by operation of law, contract or otherwise).

     Option C: Neither Option A nor B shall apply.

     5.7 Suspension of Performance. Notwithstanding any other provision of this
Master Agreement, if (a) an Event of Default or (b) a Potential Event of Default
shall have occurred and be continuing, the Non-Defaulting Party, upon written
notice to the Defaulting Party, shall have the right (i) to suspend performance
under any or all Transactions; provided, however, in no event shall any such
suspension continue for longer than ten (10) NERC Business Days with respect to
any single Transaction unless an early Termination Date shall have been declared
and notice thereof pursuant to Section 5.2 given, and (ii) to the extent an
Event of Default shall have occurred and be continuing to exercise any remedy
available at law or in equity.

                        ARTICLE SIX: PAYMENT AND NETTING

     6.1 Billing Period. Unless otherwise specifically agreed upon by the
Parties in a Transaction, the calendar month shall be the standard period for
all payments under this Agreement (other than Termination Payments and, if
"Accelerated Payment of Damages" is specified by the Parties in the Cover Sheet,
payments pursuant to Section 4.1 or 4.2 and Option premium payments pursuant to
Section 6.7). As soon as practicable after the end of each month, each Party
will render to the other Party an invoice for the payment obligations, if any,
incurred hereunder during the preceding month.

                                       26

<PAGE>

     6.2 Timeliness of Payment. Unless otherwise agreed by the Parties in a
Transaction, ail invoices under this Master Agreement shall be due and payable
in accordance with each Party's invoice instructions on or before the later of
the twentieth (20th) day of each month, or tenth (10th) day after receipt of the
invoice or, if such day is not a Business Day, then on the next Business Day.
Each Party will make payments by electronic funds transfer, or by other mutually
agreeable method(s), to the account designated by the other Party. Any amounts
not paid by the due date will be deemed delinquent and will accrue interest at
the Interest Rate, such interest to be calculated from and including the due
date to but excluding the date the delinquent amount is paid in full.

     6.3 Disputes and Adjustments of Invoices. A Party may, in good faith,
dispute the correctness of any invoice or any adjustment to an invoice, rendered
under this Agreement or adjust any invoice for any arithmetic or computational
error within twelve (12) months of the date the invoice, or adjustment to an
invoice, was rendered. In the event an invoice or portion thereof, or any other
claim or adjustment arising hereunder, is disputed, payment of the undisputed
portion of the invoice shall be required to be made when due, with notice of the
objection given to the other Party. Any invoice dispute or invoice adjustment
shall be in writing and shall state the basis for the dispute or adjustment
Payment of the disputed amount shall not be required until the dispute is
resolved. Upon resolution of the dispute, any required payment shall be made
within two (2) Business Days of such resolution along with interest accrued at
the Interest Rate from and including the due date to but excluding the date
paid. Inadvertent overpayments shall be returned upon request or deducted by the
Party receiving such overpayment from subsequent payments, with interest accrued
at the Interest Rate from and including the date of such overpayment to but
excluding the date repaid or deducted by the Party receiving such overpayment.
Any dispute with respect to an invoice is waived unless the other Party is
notified in accordance with this Section 6.3 within twelve (12) months after the
invoice is rendered or any specific adjustment to the invoice is made. If an
invoice is not rendered within twelve (12) months after the close of the month
during which performance of a Transaction occurred, the right to payment for
such performance is waived.

     6.4 Netting of Payments. The Parties hereby agree that they shall discharge
mutual debts and payment obligations due and owing to each other on the same
date pursuant to all Transactions through netting, in which case all amounts
owed by each Party to the other Party for the purchase and sale of Products
during the monthly billing period under this Master Agreement, including any
related damages calculated pursuant to Article Four (unless one of the Parties
elects to accelerate payment of such amounts as permitted by Article Four),
interest, and payments or credits, shall be netted so that only the excess
amount remaining due shall be paid by the Party who owes it.

     6.5 Payment Obligation Absent Netting. If no mutual debts or payment
obligations exist and only one Party owes a debt or obligation to the other
during the monthly billing period, including, but not limited to, any related
damage amounts calculated pursuant to Article Four, interest, and payments or
credits, that Party shall pay such sum in full when due.

     6.6 Security. Unless the Party benefiting from Performance Assurance or a
guaranty notifies the other Party in writing, and except in connection with a
liquidation and termination in accordance with Article Five, all amounts netted
pursuant to this Article Six shall not take into

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<PAGE>

account or include any Performance Assurance or guaranty which may be in effect
to secure a Party's performance under this Agreement.

     6.7 Payment for Options. The premium amount for the purchase of an Option
shall be paid within two (2) Business Days of receipt of an invoice from the
Option Seller. Upon exercise of an Option, payment for the Product underlying
such Option shall be due in accordance with Section 6.1.

     6.8 Transaction Netting. If the Parties enter into one or more
Transactions, which in conjunction with one or more other outstanding
Transactions, constitute Offsetting Transactions, then all such Offsetting
Transactions may by agreement of the Parties, be netted into a single
Transaction under which:

          (a)  the Party obligated to deliver the greater amount of Energy will
               deliver the difference between the total amount it is obligated
               to deliver and the total amount to be delivered to it under the
               Offsetting Transactions, and

          (b)  the Party owing the greater aggregate payment will pay the net
               difference owed between the Parties.

Each single Transaction resulting under this Section shall be deemed part of the
single, indivisible contractual arrangement between the parties, and once such
resulting Transaction occurs, outstanding obligations under the Offsetting
Transactions which are satisfied by such offset shall terminate.

                           ARTICLE SEVEN: LIMITATIONS

     7.1 Limitation of Remedies, Liability and Damages. EXCEPT AS SET FORTH
HEREIN, THERE IS NO WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE, AND ANY AND ALL IMPLIED WARRANTIES ARE DISCLAIMED. THE PARTIES CONFIRM
THAT THE EXPRESS REMEDIES AND MEASURES OF DAMAGES PROVIDED IN THIS AGREEMENT
SATISFY THE ESSENTIAL PURPOSES HEREOF. FOR BREACH OF ANY PROVISION FOR WHICH AN
EXPRESS REMEDY OR MEASURE OF DAMAGES IS PROVIDED, SUCH EXPRESS REMEDY OR MEASURE
OF DAMAGES SHALL BE THE SOLE AND EXCLUSIVE REMEDY, THE OBLIGOR'S LIABILITY SHALL
BE LIMITED AS SET FORTH IN SUCH PROVISION AND ALL OTHER REMEDIES OR DAMAGES AT
LAW OR IN EQUITY ARE WAIVED. IF NO REMEDY OR MEASURE OF DAMAGES IS EXPRESSLY
PROVIDED HEREIN OR IN A TRANSACTION, THE OBLIGOR'S LIABILITY SHALL BE LIMITED TO
DIRECT ACTUAL DAMAGES ONLY, SUCH DIRECT ACTUAL DAMAGES SHALL BE THE SOLE AND
EXCLUSIVE REMEDY AND ALL OTHER REMEDIES OR DAMAGES AT LAW OR IN EQUITY ARE
WAIVED. UNLESS EXPRESSLY HEREIN PROVIDED, NEITHER PARTY SHALL BE LIABLE FOR
CONSEQUENTIAL, INCIDENTAL, PUNITIVE, EXEMPLARY OR INDIRECT DAMAGES, LOST PROFITS
OR OTHER BUSINESS INTERRUPTION DAMAGES, BY STATUTE, IN TORT OR CONTRACT, UNDER
ANY INDEMNITY PROVISION OR OTHERWISE. IT IS THE INTENT OF THE PARTIES THAT THE
LIMITATIONS HEREIN IMPOSED ON REMEDIES

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<PAGE>

AND THE MEASURE OF DAMAGES BE WITHOUT REGARD TO THE CAUSE OR CAUSES RELATED
THERETO, INCLUDING THE NEGLIGENCE OF ANY PARTY, WHETHER SUCH NEGLIGENCE BE SOLE,
JOINT OR CONCURRENT, OR ACTIVE OR PASSIVE. TO THE EXTENT ANY DAMAGES REQUIRED TO
BE PAID HEREUNDER ARE LIQUIDATED, THE PARTIES ACKNOWLEDGE THAT THE DAMAGES ARE
DIFFICULT OR IMPOSSIBLE TO DETERMINE, OR OTHERWISE OBTAINING AN ADEQUATE REMEDY
IS INCONVENIENT AND THE DAMAGES CALCULATED HEREUNDER CONSTITUTE A REASONABLE
APPROXIMATION OF THE HARM OR LOSS.

                ARTICLE EIGHT: CREDIT AND COLLATERAL REQUIREMENTS

     8.1 Party A Credit Protection. The applicable credit and collateral
requirements shall be as specified on the Cover Sheet. If no option in Section
8.1 (a) is specified on the Cover Sheet, Section 8.1(a) Option C shall apply
exclusively. If none of Sections 8.1(b), 8.1(c) or 8.1(d) are specified on the
Cover Sheet, Section 8.1(b) shall apply exclusively.

          (a)  Financial Information. Option A: If requested by Party A, Party B
               shall deliver (i) within 120 days following the end of each
               fiscal year, a copy of Party B's annual report containing audited
               consolidated financial statements for such fiscal year and (ii)
               within 60 days after the end of each of its first three fiscal
               quarters of each fiscal year, a copy of Party B's quarterly
               report containing unaudited consolidated financial statements for
               such fiscal quarter. In all cases the statements shall be for the
               most recent accounting period and prepared in accordance with
               generally accepted accounting principles; provided, however, that
               should any such statements not be available on a timely basis due
               to a delay in preparation or certification, such delay shall not
               be an Event of Default so long as Party B diligently pursues the
               preparation, certification and delivery of the statements.

     Option B: If requested by Party A, Party B shall deliver (i) within 120
days following the end of each fiscal year, a copy of the annual report
containing audited consolidated financial statements for such fiscal year for
the party(s) specified on the Cover Sheet and (ii) within 60 days after the end
of each of its first three fiscal quarters of each fiscal year, a copy of
quarterly report containing unaudited consolidated financial statements for such
fiscal quarter for the party(s) specified on the Cover Sheet. In all cases the
statements shall be for the most recent accounting period and shall be prepared
in accordance with generally accepted accounting principles; provided, however,
that should any such statements not be available on a timely basis due to a
delay in preparation or certification, such delay shall not be an Event of
Default so long as the relevant entity diligently pursues the preparation,
certification and delivery of the statements.

     Option C: Party A may request from Party B the information specified in the
Cover Sheet.

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<PAGE>

          (b)  Credit Assurances. If Party A has reasonable grounds to believe
               that Party B's creditworthiness or performance under this
               Agreement has become unsatisfactory, Party A will provide Party B
               with written notice requesting Performance Assurance in an amount
               determined by Party A in a commercially reasonable manner. Upon
               receipt of such notice Party B shall have three (3) Business Days
               to remedy the situation by providing such Performance Assurance
               to Party A. In the event that Party B fails to provide such
               Performance Assurance, or a guaranty or other credit assurance
               acceptable to Party A within three (3) Business Days of receipt
               of notice, then an Event of Default under Article Five will be
               deemed to have occurred and Party A will be entitled to the
               remedies set forth in Article Five of this Master Agreement.

          (c)  Collateral Threshold. If at any time and from time to time during
               the term of this Agreement (and notwithstanding whether an Event
               of Default has occurred), the Termination Payment that would be
               owed to Party A plus Party B's Independent Amount, if any,
               exceeds the Party B Collateral Threshold, then Party A, on any
               Business Day, may request that Party B provide Performance
               Assurance in an amount equal to the amount by which the
               Termination Payment plus Party B's Independent Amount, if any,
               exceeds the Party B Collateral Threshold (rounding upwards for
               any fractional amount to the next Party B Rounding Amount)
               ("Party B Performance Assurance"), less any Party B Performance
               Assurance already posted with Party A. Such Party B Performance
               Assurance shall be delivered to Party A within three (3) Business
               Days of the date of such request. On any Business Day (but no
               more frequently than weekly with respect to Letters of Credit and
               daily with respect to cash), Party B, at its sole cost, may
               request that such Party B Performance Assurance be reduced
               correspondingly to the amount of such excess Termination Payment
               plus Party B's Independent Amount, if any, (rounding upwards for
               any fractional amount to the next Party B Rounding Amount). In
               the event that Party B fails to provide Party B Performance
               Assurance pursuant to the terms of this Article Eight within
               three (3) Business Days, then an Event of Default under Article
               Five shall be deemed to have occurred and Party A will be
               entitled to the remedies set forth in Article Five of this Master
               Agreement.

     For purposes of this Section 8.1(c), the calculation of the Termination
Payment shall be calculated pursuant to Section 5.3 by Party A as if all
outstanding Transactions had been liquidated, and in addition thereto, shall
include all amounts owed but not yet paid by Party B to Party A, whether or not
such amounts are due, for performance already provided pursuant to any and all
Transactions.

          (d)  Downgrade Event. If at any time there shall occur a Downgrade
               Event in respect of Party B, then Party A may require Party B to
               provide Performance Assurance in an amount determined by Party A
               in a commercially reasonable manner. In the event Party B shall
               fail to

                                       30

<PAGE>

               provide such Performance Assurance or a guaranty or other credit
               assurance acceptable to Party A within three (3) Business Days of
               receipt of notice, then an Event of Default shall be deemed to
               have occurred and Party A will be entitled to the remedies set
               forth in Article Five of this Master Agreement.

          (e)  If specified on the Cover Sheet, Party B shall deliver to Party
               A, prior to or concurrently with the execution and delivery of
               this Master Agreement a guarantee in an amount not less than the
               Guarantee Amount specified on the Cover Sheet and in a form
               reasonably acceptable to Party A.

     8.2 Party B Credit Protection. The applicable credit and collateral
requirements shall be as specified on the Cover Sheet. If no option in Section
8.2(a) is specified on the Cover Sheet, Section 8.2(a) Option C shall apply
exclusively. If none of Sections 8.2(b), 8.2(c) or 8.2(d) are specified on the
Cover Sheet, Section 8.2(b) shall apply exclusively.

          (a)  Financial Information. Option A: If requested by Party B, Party A
               shall deliver (i) within 120 days following the end of each
               fiscal year, a copy of Party A's annual report containing audited
               consolidated financial statements for such fiscal year and (ii)
               within 60 days after the end of each of its first three fiscal
               quarters of each fiscal year, a copy of such Party's quarterly
               report containing unaudited consolidated financial statements for
               such fiscal quarter. In all cases the statements shall be for the
               most recent accounting period and prepared in accordance with
               generally accepted accounting principles; provided, however, that
               should any such statements not be available on a timely basis due
               to a delay in preparation or certification, such delay shall not
               be an Event of Default so long as such Party diligently pursues
               the preparation, certification and delivery of the statements.

     Option B: If requested by Party B, Party A shall deliver (i) within 120
days following the end of each fiscal year, a copy of the annual report
containing audited consolidated financial statements for such fiscal year for
the party(s) specified on the Cover Sheet and (ii) within 60 days after the end
of each of its first three fiscal quarters of each fiscal year, a copy of
quarterly report containing unaudited consolidated financial statements for such
fiscal quarter for the party(s) specified on the Cover Sheet. In all cases the
statements shall be for the most recent accounting period and shall be prepared
in accordance with generally accepted accounting principles; provided, however,
that should any such statements not be available on a timely basis due to a
delay in preparation or certification, such delay shall not be an Event of
Default so long as the relevant entity diligently pursues the preparation,
certification and delivery of the statements.

     Option C: Party B may request from Party A the information specified in the
Cover Sheet.

          (b)  Credit Assurances. If Party B has reasonable grounds to believe
               that Party A's creditworthiness or performance under this
               Agreement has become

                                       31

<PAGE>

               unsatisfactory, Party B will provide Party A with written notice
               requesting Performance Assurance in an amount determined by Party
               B in a commercially reasonable manner. Upon receipt of such
               notice Party A shall have three (3) Business Days to remedy the
               situation by providing such Performance Assurance to Party B. In
               the event that Party A fails to provide such Performance
               Assurance, or a guaranty or other credit assurance acceptable to
               Party B within three (3) Business Days of receipt of notice, then
               an Event of Default under Article Five will be deemed to have
               occurred and Party B will be entitled to the remedies set forth
               in Article Five of this Master Agreement.

          (c)  Collateral Threshold. If at any time and from time to time during
               the term of this Agreement (and notwithstanding whether an Event
               of Default has occurred), the Termination Payment that would be
               owed to Party B plus Party A's Independent Amount, if any,
               exceeds the Party A Collateral Threshold, then Party B, on any
               Business Day, may request that Party A provide Performance
               Assurance in an amount equal to the amount by which the
               Termination Payment plus Party A's Independent Amount, if any,
               exceeds the Party A Collateral Threshold (rounding upwards for
               any fractional amount to the next Party A Rounding Amount)
               ("Party A Performance Assurance"), less any Party A Performance
               Assurance already posted with Party B. Such Party A Performance
               Assurance shall be delivered to Party B within three (3) Business
               Days of the date of such request. On any Business Day (but no
               more frequently than weekly with respect to Letters of Credit and
               daily with respect to cash), Party A, at its sole cost, may
               request that such Party A Performance Assurance be reduced
               correspondingly to the amount of such excess Termination Payment
               plus Party A's Independent Amount, if any, (rounding upwards for
               any fractional amount to the next Party A Rounding Amount). In
               the event that Party A fails to provide Party A Performance
               Assurance pursuant to the terms of this Article Eight within
               three (3) Business Days, then an Event of Default under Article
               Five shall be deemed to have occurred and Party B will be
               entitled to the remedies set forth in Article Five of this Master
               Agreement

     For purposes of this Section 8.2(c), the calculation of the Termination
Payment shall be calculated pursuant to Section 5.3 by Party B as if all
outstanding Transactions had been liquidated, and in addition thereto, shall
include all amounts owed but not yet paid by Party A to Party B, whether or not
such amounts are due, for performance already provided pursuant to any and all
Transactions.

          (d)  Downgrade Event. If at any time there shall occur a Downgrade
               Event in respect of Party A, then Party B may require Party A to
               provide Performance Assurance in an amount determined by Party B
               in a commercially reasonable manner. In the event Party A shall
               fail to provide such Performance Assurance or a guaranty or other
               credit assurance acceptable to Party B within three (3) Business
               Days of receipt

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<PAGE>

               of notice, then an Event of Default shall be deemed to have
               occurred and Party B will be entitled to the remedies set forth
               in Article Five of this Master Agreement.

          (e)  If specified on the Cover Sheet, Party A shall deliver to Party
               B, prior to or concurrently with the execution and delivery of
               this Master Agreement a guarantee in an amount not less than the
               Guarantee Amount specified on the Cover Sheet and in a form
               reasonably acceptable to Party B.

     8.3 Grant of Security Interest/Remedies. To secure its obligations under
this Agreement and to the extent either or both Parties deliver Performance
Assurance hereunder, each Party (a "Pledgor") hereby grants to the other Party
(the "Secured Party") a present and continuing security interest in, and lien on
(and right of setoff against), and assignment of, all cash collateral and cash
equivalent collateral and any and all proceeds resulting therefrom or the
liquidation thereof, whether now or hereafter held by, on behalf of, or for the
benefit of, such Secured Party, and each Party agrees to take such action as the
other Party reasonably requires in order to perfect the Secured Party's
first-priority security interest in, and lien on (and right of setoff against),
such collateral and any and all proceeds resulting therefrom or from the
liquidation thereof. Upon or any time after the occurrence or deemed occurrence
and during the continuation of an Event of Default or an Early Termination Date,
the Non-Defaulting Party may do any one or more of the following: (i) exercise
any of the rights and remedies of a Secured Party with respect to all
Performance Assurance, including any such rights and remedies under law then in
effect; (ii) exercise its rights of setoff against any and all property of the
Defaulting Party in the possession of the Non-Defaulting Party or its agent;
(iii) draw on any outstanding Letter of Credit issued for its benefit; and (iv)
liquidate all Performance Assurance then held by or for the benefit of the
Secured Party free from any claim or right of any nature whatsoever of the
Defaulting Party, including any equity or right of purchase or redemption by the
Defaulting Party. The Secured Party shall apply the proceeds of the collateral
realized upon the exercise of any such rights or remedies to reduce the
Pledgor's obligations under the Agreement (the Pledgor remaining liable for any
amounts owing to the Secured Party after such application), subject to the
Secured Party's obligation to return any surplus proceeds remaining after such
obligations are satisfied in full.

                       ARTICLE NINE: GOVERNMENTAL CHARGES

     9.1 Cooperation. Each Party shall use reasonable efforts to implement the
provisions of and to administer this Master Agreement in accordance with the
intent of the parties to minimize all taxes, so long as neither Party is
materially adversely affected by such efforts.

     9.2 Governmental Charges. Seller shall pay or cause to be paid all taxes
imposed by any government authority ("Governmental Charges") on or with respect
to the Product or a Transaction arising prior to the Delivery Point. Buyer shall
pay or cause to be paid all Governmental Charges on or with respect to the
Product or a Transaction at and from the Delivery Point (other than ad valorem,
franchise or income taxes which are related to the sale of the Product and are,
therefore, the responsibility of the Seller). In the event Seller is required by
law or regulation to remit or pay Governmental Charges, which are Buyer's
responsibility hereunder, Buyer shall promptly reimburse Seller for such
Governmental Charges. If Buyer is

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<PAGE>

required by law or regulation to remit or pay Governmental Charges which are
Seller's responsibility hereunder, Buyer may deduct the amount of any such
Governmental Charges from the sums due to Seller under Article 6 of this
Agreement. Nothing shall obligate or cause a Party to pay or be liable to pay
any Governmental Charges for which it is exempt under the law.

                           ARTICLE TEN: MISCELLANEOUS

     10.1 Term of Master Agreement. The term of this Master Agreement shall
commence on the Effective Date and shall remain in effect until terminated by
either Party upon (thirty) 30 days' prior written notice; provided, however,
that such termination shall not affect or excuse the performance of either Party
under any provision of this Master Agreement that by its terms survives any such
termination and, provided further, that this Master Agreement and any other
documents executed and delivered hereunder shall remain in effect with respect
to the Transaction(s) entered into prior to the effective date of such
termination until both Parties have fulfilled all of their obligations with
respect to such Transaction(s), or such Transaction(s) that have been terminated
under Section 5.2 of this Agreement.

     10.2 Representations and Warranties. On the Effective Date and the date of
entering into each Transaction, each Party represents and warrants to the other
Party that:

          (i)  it is duly organized, validly existing and in good standing under
               the laws of the jurisdiction of its formation;

          (ii) it has all regulatory authorizations necessary for it to legally
               perform its obligations under this Master Agreement and each
               Transaction (including any Confirmation accepted in accordance
               with Section 2.3);

          (iii) the execution, delivery and performance of this Master Agreement
               and each Transaction (including any Confirmation accepted in
               accordance with Section 2.3) are within its powers, have been
               duly authorized by all necessary action and do not violate any of
               the terms and conditions in its governing documents, any
               contracts to which it is a party or any law, rule, regulation,
               order or the like applicable to it;

          (iv) this Master Agreement, each Transaction (including any
               Confirmation accepted in accordance with Section 2.3), and each
               other document executed and delivered in accordance with this
               Master Agreement constitutes its legally valid and binding
               obligation enforceable against it in accordance with its terms;
               subject to any Equitable Defenses.

          (v)  it is not Bankrupt and there are no proceedings pending or being
               contemplated by it or, to its knowledge, threatened against it
               which would result in it being or becoming Bankrupt;

          (vi) there is not pending or, to its knowledge, threatened against it
               or any of its Affiliates any legal proceedings that could
               materially adversely affect its ability to perform its
               obligations under this Master Agreement and each

                                       34

<PAGE>

               Transaction (including any Confirmation accepted in accordance
               with Section 2.3);

          (vii) no Event of Default or Potential Event of Default with respect
               to it has occurred and is continuing and no such event or
               circumstance would occur as a result of its entering into or
               performing its obligations under this Master Agreement and each
               Transaction (including any Confirmation accepted in accordance
               with Section 2.3);

          (viii) it is acting for its own account, has made its own independent
               decision to enter into this Master Agreement and each Transaction
               (including any Confirmation accepted in accordance with Section
               2.3) and as to whether this Master Agreement and each such
               Transaction (including any Confirmation accepted in accordance
               with Section 2.3) is appropriate or proper for it based upon its
               own judgment, is not relying upon the advice or recommendations
               of the other Party in so doing, and is capable of assessing the
               merits of and understanding, and understands and accepts, the
               terms, conditions and risks of this Master Agreement and each
               Transaction (including any Confirmation accepted in accordance
               with Section 2.3);

          (ix) it is a "forward contract merchant" within the meaning of the
               United States Bankruptcy Code;

          (x)  it has entered into this Master Agreement and each Transaction
               (including any Confirmation accepted in accordance with Section
               2.3) in connection with the conduct of its business and it has
               the capacity or ability to make or take delivery of all Products
               referred to in the Transaction to which it is a Party;

          (xi) with respect to each Transaction (including any Confirmation
               accepted in accordance with Section 2.3) involving the purchase
               or sale of a Product or an Option, it is a producer, processor,
               commercial user or merchant handling the Product, and it is
               entering into such Transaction for purposes related to its
               business as such; and

          (xii) the material economic terms of each Transaction are subject to
               individual negotiation by the Parties.

     10.3 Title and Risk of Loss. Title to and risk of loss related to the
Product shall transfer from Seller to Buyer at the Delivery Point. Seller
warrants that it will deliver to Buyer the Quantity of the Product free and
clear of all liens, security interests, claims and encumbrances or any interest
therein or thereto by any person arising prior to the Delivery Point.

     10.4 Indemnity. Each Party shall indemnify, defend and hold harmless the
other Party from and against any Claims arising from or out of any event,
circumstance, act or incident first occurring or existing during the period when
control and title to Product is vested in such Party

                                       35

<PAGE>

as provided in Section 10.3. Each Party shall indemnify, defend and hold
harmless the other Party against any Governmental Charges for which such Party
is responsible under Article Nine.

     10.5 Assignment. Neither Party shall assign this Agreement or its rights
hereunder without the prior written consent of the other Party, which consent
may be withheld in the exercise of its sole discretion; provided, however,
either Party may, without the consent of the other Party (and without relieving
itself from liability hereunder), (i) transfer, sell, pledge, encumber or assign
this Agreement or the accounts, revenues or proceeds hereof in connection with
any financing or other financial arrangements, (ii) transfer or assign this
Agreement to an affiliate of such Party which affiliate's creditworthiness is
equal to or higher than that of such Party, or (iii) transfer or assign this
Agreement to any person or entity succeeding to all or substantially all of the
assets whose creditworthiness is equal to or higher than that of such Party;
provided, however, that in each such case, any such assignee shall agree in
writing to be bound by the terms and conditions hereof and so long as the
transferring Party delivers such tax and enforceability assurance as the
non-transferring Party may reasonably request.

     10.6 Governing Law. THIS AGREEMENT AND THE RIGHTS AND DUTIES OF THE PARTIES
HEREUNDER SHALL BE GOVERNED BY AND CONSTRUED, ENFORCED AND PERFORMED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD TO PRINCIPLES
OF CONFLICTS OF LAW. EACH PARTY WAIVES ITS RESPECTIVE RIGHT TO ANY JURY TRIAL
WITH RESPECT TO ANY LITIGATION ARISING UNDER OR IN CONNECTION WITH THIS
AGREEMENT.

     10.7 Notices. All notices, requests, statements or payments shall be made
as specified in the Cover Sheet. Notices (other than scheduling requests) shall,
unless otherwise specified herein, be in writing and may be delivered by hand
delivery, United States mail, overnight courier service or facsimile. Notice by
facsimile or hand delivery shall be effective at the close of business on the
day actually received, if received during business hours on a Business Day, and
otherwise shall be effective at the close of business on the next Business Day.
Notice by overnight United States mail or courier shall be effective on the next
Business Day after it was sent. A Party may change its addresses by providing
notice of same in accordance herewith.

     10.8 General. This Master Agreement (including the exhibits, schedules and
any written supplements hereto), the Party A Tariff, if any, the Party B Tariff,
if any, any designated collateral, credit support or margin agreement or similar
arrangement between the Parties and all Transactions (including any Confirmation
accepted in accordance with Section 2.3) constitute the entire agreement between
the Parties relating to the subject matter. Notwithstanding the foregoing, any
collateral, credit support or margin agreement or similar arrangement between
the Parties shall, upon designation by the Parties, be deemed part of this
Agreement and shall be incorporated herein by reference. This Agreement shall be
considered for all purposes as prepared through the joint efforts of the parties
and shall not be construed against one party or the other as a result of the
preparation, substitution, submission or other event of negotiation, drafting or
execution hereof. Except to the extent herein provided for, no amendment or
modification to this Master Agreement shall be enforceable unless reduced to
writing and executed by both Parties. Each Party agrees if it seeks to amend any
applicable wholesale power sales tariff during the term of this Agreement, such
amendment will not in any way affect outstanding Transactions under this
Agreement without the prior written consent of the other

                                       36

<PAGE>

Party. Each Party further agrees that it will not assert, or defend itself, on
the basis that any applicable tariff is inconsistent with this Agreement. This
Agreement shall not impart any rights enforceable by any third party (other than
a permitted successor or assignee bound to this Agreement). Waiver by a Party of
any default by the other Party shall not be construed as a waiver of any other
default. Any provision declared or rendered unlawful by any applicable court of
law or regulatory agency or deemed unlawful because of a statutory change
(individually or collectively, such events referred to as "Regulatory Event")
will not otherwise affect the remaining lawful obligations that arise under this
Agreement; and provided, further, that if a Regulatory Event occurs, the Parties
shall use their best efforts to reform this Agreement in order to give effect to
the original intention of the Parties. The term "including" when used in this
Agreement shall be by way of example only and shall not be considered in any way
to be in limitation. The headings used herein are for convenience and reference
purposes only. All indemnity and audit rights shall survive the termination of
this Agreement for twelve (12) months. This Agreement shall be binding on each
Party's successors and permitted assigns.

     10.9 Audit. Each Party has the right, at its sole expense and during normal
working hours, to examine the records of the other Party to the extent
reasonably necessary to verify the accuracy of any statement, charge or
computation made pursuant to this Master Agreement. If requested, a Party shall
provide to the other Party statements evidencing the Quantity delivered at the
Delivery Point. If any such examination reveals any inaccuracy in any statement,
the necessary adjustments in such statement and the payments thereof will be
made promptly and shall bear interest calculated at the Interest Rate from the
date the overpayment or underpayment was made until paid; provided, however,
that no adjustment for any statement or payment will be made unless objection to
the accuracy thereof was made prior to the lapse of twelve (12) months from the
rendition thereof, and thereafter any objection shall be deemed waived.

     10.10 Forward Contract. The Parties acknowledge and agree that all
Transactions constitute "forward contracts" within the meaning of the United
States Bankruptcy Code.

     10.11 Confidentiality. If the Parties have elected on the Cover Sheet to
make this Section 10.11 applicable to this Master Agreement, neither Party shall
disclose the terms or conditions of a Transaction under this Master Agreement to
a third party (other than the Party's employees, lenders, counsel, accountants
or advisors who have a need to know such information and have agreed to keep
such terms confidential) except in order to comply with any applicable law,
regulation, or any exchange, control area or independent system operator rule or
in connection with any court or regulatory proceeding; provided, however, each
Party shall, to the extent practicable, use reasonable efforts to prevent or
limit the disclosure. The Parties shall be entitled to all remedies available at
law or in equity to enforce, or seek relief in connection with, this
confidentiality obligation.

                                       37

<PAGE>

                                   SCHEDULE M

(THIS SCHEDULE IS INCLUDED IF THE APPROPRIATE BOX ON THE COVER SHEET IS MARKED
INDICATING A PARTY IS A GOVERNMENTAL ENTITY OR PUBLIC POWER SYSTEM)

     A.   The Parties agree to add the following definitions in Article One.

               "Act" means ____________________________________.(1)

               "Governmental Entity or Public Power System" means a
          municipality, county, governmental board, public power authority,
          public utility district, joint action agency, or other similar
          political subdivision or public entity of the United States, one or
          more States or territories or any combination thereof.

               "Special Fund" means a fund or account of the Governmental Entity
          or Public Power System set aside and or pledged to satisfy the Public
          Power System's obligations hereunder out of which amounts shall be
          paid to satisfy all of the Public Power System's obligations under
          this Master Agreement for the entire Delivery Period.

     B. The following sentence shall be added to the end of the definition of
"Force Majeure" in Article One.

          If the Claiming Party is a Governmental Entity or Public Power System,
          Force Majeure does not include any action taken by the Governmental
          Entity or Public Power System in its governmental capacity.

     C. The Parties agree to add the following representations and warranties to
Section 10.2:

               Further and with respect to a Party that is a Governmental Entity
          or Public Power System, such Governmental Entity or Public Power
          System represents and warrants to the other Party continuing
          throughout the term of this Master Agreement, with respect to this
          Master Agreement and each Transaction, as follows: (i) all acts
          necessary to the valid execution, delivery and performance of this
          Master Agreement, including without limitation, competitive bidding,
          public notice, election, referendum, prior appropriation or other
          required procedures has or will be taken and performed as required
          under the Act and the Public Power System's ordinances, bylaws or
          other regulations, (ii) all persons making up the governing body of
          Governmental Entity or Public Power System are the duly elected or
          appointed incumbents in their positions and hold such

----------
(1)  Cite the state enabling and other relevant statutes applicable to
     Governmental Entity or Public Power System.

                                       38

<PAGE>

          positions in good standing in accordance with the Act and other
          applicable law, (iii) entry into and performance of this Master
          Agreement by Governmental Entity or Public Power System are for a
          proper public purpose within the meaning of the Act and all other
          relevant constitutional, organic or other governing documents and
          applicable law, (iv) the term of this Master Agreement does not extend
          beyond any applicable limitation imposed by the Act or other relevant
          constitutional, organic or other governing documents and applicable
          law, (v) the Public Power System's obligations to make payments
          hereunder are unsubordinated obligations and such payments are (a)
          operating and maintenance costs (or similar designation) which enjoy
          first priority of payment at all times under any and all bond
          ordinances or indentures to which it is a party, the Act and all other
          relevant constitutional, organic or other governing documents and
          applicable law or (b) otherwise not subject to any prior claim under
          any and all bond ordinances or indentures to which it is a party, the
          Act and all other relevant constitutional, organic or other governing
          documents and applicable law and are available without limitation or
          deduction to satisfy all Governmental Entity or Public Power System'
          obligations hereunder and under each Transaction or (c) are to be made
          solely from a Special Fund, (vi) entry into and performance of this
          Master Agreement and each Transaction by the Governmental Entity or
          Public Power System will not adversely affect the exclusion from gross
          income for federal income tax purposes of interest on any obligation
          of Governmental Entity or Public Power System otherwise entitled to
          such exclusion, and (vii) obligations to make payments hereunder do
          not constitute any kind of indebtedness of Governmental Entity or
          Public Power System or create any kind of lien on, or security
          interest in, any property or revenues of Governmental Entity or Public
          Power System which, in either case, is proscribed by any provision of
          the Act or any other relevant constitutional, organic or other
          governing documents and applicable law, any order or judgment of any
          court or other agency of government applicable to it or its assets, or
          any contractual restriction binding on or affecting it or any of its
          assets.

     D.   The Parties agree to add the following sections to Article Three:

               Section 3.4 Public Power System's Deliveries. On the Effective
          Date and as a condition to the obligations of the other Party under
          this Agreement, Governmental Entity or Public Power System shall
          provide the other Party hereto (i) certified copies of all ordinances,
          resolutions, public notices and other documents evidencing the
          necessary authorizations with respect to the execution, delivery and
          performance by Governmental Entity or Public Power System of this
          Master Agreement and (ii) an opinion of counsel for Governmental
          Entity or Public Power System, in form and substance reasonably
          satisfactory to the Other Party, regarding the validity, binding
          effect and enforceability of this Master Agreement against
          Governmental Entity or Public Power System in

                                       39

<PAGE>

          respect of the Act and all other relevant constitutional organic or
          other governing documents and applicable law.

               Section 3.5 No Immunity Claim. Governmental Entity or Public
          Power System warrants and covenants that with respect to its
          contractual obligations hereunder and performance thereof, it will not
          claim immunity on the grounds of sovereignty or similar grounds with
          respect to itself or its revenues or assets from (a) suit, (b)
          jurisdiction of court (including a court located outside the
          jurisdiction of its organization), (c) relief by way of injunction,
          order for specific performance or recovery of property, (d) attachment
          of assets, or (e) execution or enforcement of any judgment.

     E. If the appropriate box is checked on the Cover Sheet, as an alternative
to selecting one of the options under Section 8.3, the Parties agree to add the
following section to Article Three:

               Section 3.6 Governmental Entity or Public Power System Security.
          With respect to each Transaction, Governmental Entity or Public Power
          System shall either (i) have created and set aside a Special Fund or
          (ii) upon execution of this Master Agreement and prior to the
          commencement of each subsequent fiscal year of Governmental Entity or
          Public Power System during any Delivery Period, have obtained all
          necessary budgetary approvals and certifications for payment of all of
          its obligations under this Master Agreement for such fiscal year, any
          breach of this provision shall be deemed to have arisen during a
          fiscal period of Governmental Entity or Public Power System for which
          budgetary approval or certification of its obligations under this
          Master Agreement is in effect and, notwithstanding anything to the
          contrary in Article Four, an Early Termination Date shall
          automatically and without further notice occur hereunder as of such
          date wherein Governmental Entity or Public Power System shall be
          treated as the Defaulting Party. Governmental Entity or Public Power
          System shall have allocated to the Special Fund or its general funds a
          revenue base that is adequate to cover Public Power System's payment
          obligations hereunder throughout the entire Delivery Period.

     F. If the appropriate box is checked on the Cover Sheet, the Parties agree
to add the following section to Article Eight:

               Section 8.4 Governmental Security. As security for payment and
          performance of Public Power System's obligations hereunder, Public
          Power System hereby pledges, sets over, assigns and grants to the
          other Party a security interest in all of Public Power System's right,
          title and interest in and to [specify collateral].

                                       40

<PAGE>

     G. The Parties agree to add the following sentence at the end of Section
10.6 - Governing Law:

          NOTWITHSTANDING THE FOREGOING, IN RESPECT OF THE APPLICABILITY OF THE
          ACT AS HEREIN PROVIDED, THE LAWS OF THE STATE OF _________________(2)
          SHALL APPLY.

----------
(2)  Insert relevant state for Governmental Entity or Public Power System.

                                       41
<PAGE>

                  SCHEDULE P: PRODUCTS AND RELATED DEFINITIONS

     "Ancillary Services" means any of the services identified by a Transmission
Provider in its transmission tariff as "ancillary services" including, but not
limited to, regulation and frequency response, energy imbalance, operating
reserve-spinning and operating reserve-supplemental, as may be specified in the
Transaction.

     "Capacity" has the meaning specified in the Transaction.

     "Energy" means three-phase, 60-cycle alternating current electric energy,
expressed in megawatt hours.

     "Firm (LD)" means, with respect to a Transaction, that either Party shall
be relieved of its obligations to sell and deliver or purchase and receive
without liability only to the extent that, and for the period during which, such
performance is prevented by Force Majeure. In the absence of Force Majeure, the
Party to which performance is owed shall be entitled to receive from the Party
which failed to deliver/receive an amount determined pursuant to Article Four.

     "Firm Transmission Contingent - Contract Path" means, with respect to a
Transaction, that the performance of either Seller or Buyer (as specified in the
Transaction) shall be excused, and no damages shall be payable including any
amounts determined pursuant to Article Four, if the transmission for such
Transaction is interrupted or curtailed and (i) such Party has provided for firm
transmission with the transmission provider(s) for the Product in the case of
the Seller from the generation source to the Delivery Point or in the case of
the Buyer from the Delivery Point to the ultimate sink, and (ii) such
interruption or curtailment is due to "force majeure" or "uncontrollable force"
or a similar term as defined under the applicable transmission provider's
tariff. This contingency shall excuse performance for the duration of the
interruption or curtailment notwithstanding the provisions of the definition of
"Force Majeure" in Section 1.23 to the contrary.

     "Firm Transmission Contingent - Delivery Point" means, with respect to a
Transaction, that the performance of either Seller or Buyer (as specified in the
Transaction) shall be excused, and no damages shall be payable including any
amounts determined pursuant to Article Four, if the transmission to the Delivery
Point (in the case of Seller) or from the Delivery Point (in the case of Buyer)
for such Transaction is interrupted or curtailed and (i) such Party has provided
for firm transmission with the transmission provider(s) for the Product, in the
case of the Seller, to be delivered to the Delivery Point or, in the case of
Buyer, to be received at the Delivery Point and (ii) such interruption or
curtailment is due to "force majeure" or "uncontrollable force" or a similar
term as defined under the applicable transmission provider's tariff. This
transmission contingency excuses performance for the duration of the
interruption or curtailment, notwithstanding the provisions of the definition of
"Force Majeure" in Section 1.23 to the contrary. Interruptions or curtailments
of transmission other than the transmission either immediately to or from the
Delivery Point shall not excuse performance

     "Firm (No Force Majeure)" means, with respect to a Transaction, that if
either Party fails to perform its obligation to sell and deliver or purchase and
receive the Product, the Party to which performance is owed shall be entitled to
receive from the Party which failed to perform an

                                       42

<PAGE>

amount determined pursuant to Article Four. Force Majeure shall not excuse
performance of a Firm (No Force Majeure) Transaction.

     "Into ___________________________ (the "Receiving Transmission Provider"),
Seller's Daily Choice" means that, in accordance with the provisions set forth
below, (1) the Product shall be scheduled and delivered to an interconnection or
interface ("Interface") either (a) on the Receiving Transmission Provider's
transmission system border or (b) within the control area of the Receiving
Transmission Provider if the Product is from a source of generation in that
control area, which Interface, in either case, the Receiving Transmission
Provider identifies as available for delivery of the Product in or into its
control area; and (2) Seller has the right on a daily prescheduled basis to
designate the Interface where the Product shall be delivered. An "Into" Product
shall be subject to the following provisions:

     1. Prescheduling and Notification. Subject to the provisions of Section 6,
not later than the prescheduling deadline of 11:00 a.m. CPT on the Business Day
before the next delivery day or as otherwise agreed to by Buyer and Seller,
Seller shall notify Buyer ("Seller's Notification") of Seller's immediate
upstream counterparty and the Interface (the "Designated Interface") where
Seller shall deliver the Product for the next delivery day, and Buyer shall
notify Seller of Buyer's immediate downstream counterparty.

     2. Availability of "Firm Transmission" to Buyer at Designated Interface;
"Timely Request for Transmission." "ADI" and "Available Transmission." In
determining availability to Buyer of next-day firm transmission ("Firm
Transmission") from the Designated Interface, a "Timely Request for
Transmission" shall mean a properly completed request for Firm Transmission made
by Buyer in accordance with the controlling tariff procedures, which request
shall be submitted to the Receiving Transmission Provider no later than 30
minutes after delivery of Seller's Notification, provided, however, if the
Receiving Transmission Provider is not accepting requests for Firm Transmission
at the time of Seller's Notification, then such request by Buyer shall be made
within 30 minutes of the time when the Receiving Transmission Provider first
opens thereafter for purposes of accepting requests for Firm Transmission.

     Pursuant to the terms hereof, delivery of the Product may under certain
circumstances be redesignated to occur at an Interface other than the Designated
Interface (any such alternate designated interface, an "ADI") either (a) on the
Receiving Transmission Provider's transmission system border or (b) within the
control area of the Receiving Transmission Provider if the Product is from a
source of generation in that control area, which ADI, in either case, the
Receiving Transmission Provider identifies as available for delivery of the
Product in or into its control area using either firm or non-firm transmission,
as available on a day-ahead or hourly basis (individually or collectively
referred to as "Available Transmission") within the Receiving Transmission
Provider's transmission system.

     3. Rights of Buyer and Seller Depending Upon Availability of/Timely Request
for Firm Transmission.

          A. Timely Request for Firm Transmission made by Buyer. Accepted by the
     Receiving Transmission Provider and Purchased by Buyer. If a Timely Request
     for Firm Transmission is made by Buyer and is accepted by the Receiving
     Transmission Provider

                                       43

<PAGE>

and Buyer purchases such Firm Transmission, then Seller shall deliver and Buyer
shall receive the Product at the Designated Interface.

          i. If the Firm Transmission purchased by Buyer within the Receiving
     Transmission Provider's transmission system from the Designated Interface
     ceases to be available to Buyer for any reason, or if Seller is unable to
     deliver the Product at the Designated Interface for any reason except
     Buyer's non-performance, then at Seller's choice from among the following,
     Seller shall: (a) to the extent Firm Transmission is available to Buyer
     from an ADI on a day-ahead basis, require Buyer to purchase such Firm
     Transmission from such ADI, and schedule and deliver the affected portion
     of the Product to such ADI on the basis of Buyer's purchase of Firm
     Transmission, or (b) require Buyer to purchase non-firm transmission, and
     schedule and deliver the affected portion of the Product on the basis of
     Buyer's purchase of non-firm transmission from the Designated Interface or
     an ADI designated by Seller, or (c) to the extent firm transmission is
     available on an hourly basis, require Buyer to purchase firm transmission,
     and schedule and deliver the affected portion of the Product on the basis
     of Buyer's purchase of such hourly firm transmission from the Designated
     Interface or an ADI designated by Seller.

          ii. If the Available Transmission utilized by Buyer as required by
     Seller pursuant to Section 3A(i) ceases to be available to Buyer for any
     reason, then Seller shall again have those alternatives stated in Section
     3A(i) in order to satisfy its obligations.

          iii. Seller's obligation to schedule and deliver the Product at an ADI
     is subject to Buyer's obligation referenced in Section 4B to cooperate
     reasonably therewith. If Buyer and Seller cannot complete the scheduling
     and/or delivery at an ADI, then Buyer shall be deemed to have satisfied its
     receipt obligations to Seller and Seller shall be deemed to have failed its
     delivery obligations to Buyer, and Seller shall be liable to Buyer for
     amounts determined pursuant to Article Four.

          iv. In each instance in which Buyer and Seller must make alternative
     scheduling arrangements for delivery at the Designated Interface or an ADI
     pursuant to Sections 3A(i) or (ii), and Firm Transmission had been
     purchased by both Seller and Buyer into and within the Receiving
     Transmission Provider's transmission system as to the scheduled delivery
     which could not be completed as a result of the interruption or curtailment
     of such Firm Transmission, Buyer and Seller shall bear their respective
     transmission expenses and/or associated congestion charges incurred in
     connection with efforts to complete delivery by such alternative scheduling
     and delivery arrangements. In any instance except as set forth in the
     immediately preceding sentence, Buyer and Seller must make alternative
     scheduling arrangements for delivery at the Designated Interface or an ADI
     under Sections 3A(i) or (ii), Seller shall be responsible for any
     additional transmission purchases and/or associated congestion charges
     incurred by Buyer in connection with such alternative scheduling
     arrangements.

                                       44

<PAGE>

          B. Timely Request for Firm Transmission Made by Buyer but Rejected by
     the Receiving Transmission Provider. If Buyer's Timely Request for Firm
     Transmission is rejected by the Receiving Transmission Provider because of
     unavailability of Firm Transmission from the Designated Interface, then
     Buyer shall notify Seller within 15 minutes after receipt of the Receiving
     Transmission Provider's notice of rejection ("Buyer's Rejection Notice").
     If Buyer timely notifies Seller of such unavailability of Firm Transmission
     from the Designated Interface, then Seller shall be obligated either (1) to
     the extent Firm Transmission is available to Buyer from an ADI on a
     day-ahead basis, to require Buyer to purchase (at Buyer's own expense) such
     Firm Transmission from such ADI and schedule and deliver the Product to
     such ADI on the basis of Buyer's purchase of Firm Transmission, and
     thereafter the provisions in Section 3A shall apply, or (2) to require
     Buyer to purchase (at Buyer's own expense) non-firm transmission, and
     schedule and deliver the Product on the basis of Buyer's purchase of
     non-firm transmission from the Designated Interface or an ADI designated by
     the Seller, in which case Seller shall bear the risk of interruption or
     curtailment of the non-firm transmission; provided, however, that if the
     non-firm transmission is interrupted or curtailed or if Seller is unable to
     deliver the Product for any reason, Seller shall have the right to schedule
     and deliver the Product to another ADI in order to satisfy its delivery
     obligations, in which case Seller shall be responsible for any additional
     transmission purchases and/or associated congestion charges incurred by
     Buyer in connection with Seller's inability to deliver the Product as
     originally prescheduled. If Buyer fails to timely notify Seller of the
     unavailability of Firm Transmission, then Buyer shall bear the risk of
     interruption or curtailment of transmission from the Designated Interface,
     and the provisions of Section 3D shall apply.

          C. Timely Request for Firm Transmission Made by Buyer, Accepted by the
     Receiving Transmission Provider and not Purchased by Buyer. If Buyer's
     Timely Request for Firm Transmission is accepted by the Receiving
     Transmission Provider but Buyer elects to purchase non-firm transmission
     rather than Firm Transmission to take delivery of the Product, then Buyer
     shall bear the risk of interruption or curtailment of transmission from the
     Designated Interface. In such circumstances, if Seller's delivery is
     interrupted as a result of transmission relied upon by Buyer from the
     Designated Interface, then Seller shall be deemed to have satisfied its
     delivery obligations to Buyer, Buyer shall be deemed to have failed to
     receive the Product and Buyer shall be liable to Seller for amounts
     determined pursuant to Article Four.

          D. No Timely Request for Firm Transmission Made by Buyer, or Buyer
     Fails to Timely Send Buyer's Rejection Notice. If Buyer fails to make a
     Timely Request for Firm Transmission or Buyer fails to timely deliver
     Buyer's Rejection Notice, then Buyer shall bear the risk of interruption or
     curtailment of transmission from the Designated Interface. In such
     circumstances, if Seller's delivery is interrupted as a result of
     transmission relied upon by Buyer from the Designated Interface, then
     Seller shall be deemed to have satisfied its delivery obligations to Buyer,
     Buyer shall be deemed to have failed to receive the Product and Buyer shall
     be liable to Seller for amounts determined pursuant to Article Four.

                                       45

<PAGE>

     4. Transmission.

          A. Seller's Responsibilities. Seller shall be responsible for
     transmission required to deliver the Product to the Designated Interface or
     ADI, as the case may be. It is expressly agreed that Seller is not required
     to utilize Firm Transmission for its delivery obligations hereunder, and
     Seller shall bear the risk of utilizing non-firm transmission. If Seller's
     scheduled delivery to Buyer is interrupted as a result of Buyer's attempted
     transmission of the Product beyond the Receiving Transmission Provider's
     system border, then Seller will be deemed to have satisfied its delivery
     obligations to Buyer, Buyer shall be deemed to have failed to receive the
     Product and Buyer shall be liable to Seller for damages pursuant to Article
     Four.

          B. Buyer's Responsibilities. Buyer shall be responsible for
     transmission required to receive and transmit the Product at and from the
     Designated Interface or ADI, as the case may be, and except as specifically
     provided in Section 3A and 3B, shall be responsible for any costs
     associated with transmission therefrom. If Seller is attempting to complete
     the designation of an ADI as a result of Seller's rights and obligations
     hereunder, Buyer shall co-operate reasonably with Seller in order to effect
     such alternate designation.

     5. Force Majeure. An "Into" Product shall be subject to the "Force.
Majeure" provisions in Section 1.23.

     6. Multiple Parties in Delivery Chain Involving a Designated Interface.
Seller and Buyer recognize that there may be multiple parties involved in the
delivery and receipt of the Product at the Designated Interface or ADI to the
extent that (1) Seller may be purchasing the Product from a succession of other
sellers ("Other Sellers"), the first of which Other Sellers shall be causing the
Product to be generated from a source ("Source Seller") and/or (2) Buyer may be
selling the Product to a succession of other buyers ("Other Buyers"), the last
of which Other Buyers shall be using the Product to serve its energy needs
("Sink Buyer"). Seller and Buyer further recognize that in certain Transactions
neither Seller nor Buyer may originate the decision as to either (a) the
original identification of the Designated Interface or ADI (which designation
may be made by the Source Seller) or (b) the Timely Request for Firm
Transmission or the purchase of other Available Transmission (which request may
be made by the Sink Buyer). Accordingly, Seller and Buyer agree as follows:

          A. If Seller is not the Source Seller, then Seller shall notify Buyer
     of the Designated Interface promptly after Seller is notified thereof by
     the Other Seller with whom Seller has a contractual relationship, but in no
     event may such designation of the Designated Interface be later than the
     prescheduling deadline pertaining to the Transaction between Buyer and
     Seller pursuant to Section 1.

          B. If Buyer is not the Sink Buyer, then Buyer shall notify the Other
     Buyer with whom Buyer has a contractual relationship of the Designated
     Interface promptly after Seller notifies Buyer thereof, with the intent
     being that the party bearing actual responsibility to secure transmission
     shall have up to 30 minutes after receipt of the Designated Interface to
     submit its Timely Request for Firm Transmission.

                                       46

<PAGE>

          C. Seller and Buyer each agree that any other communications or
     actions required to be given or made in connection with this "Into Product"
     (including without limitation, information relating to an ADI) shall be
     made or taken promptly after receipt of the relevant information from the
     Other Sellers and Other Buyers, as the case may be.

          D. Seller and Buyer each agree that in certain Transactions time is of
     the essence and it may be desirable to provide necessary information to
     Other Sellers and Other Buyers in order to complete the scheduling and
     delivery of the Product. Accordingly, Seller and Buyer agree that each has
     the right, but not the obligation, to provide information at its own risk
     to Other Sellers and Other Buyers, as the case may be, in order to affect
     the prescheduling, scheduling and delivery of the Product

     "Native Load" means the demand imposed on an electric utility or an entity
by the requirements of retail customers located within a franchised service
territory that the electric utility or entity has statutory obligation to serve.

     "Non-Firm" means, with respect to a Transaction, that delivery or receipt
of the Product may be interrupted for any reason or for no reason, without
liability on the part of either Party.

     "System Firm" means that the Product will be supplied from the owned or
controlled generation or pre-existing purchased power assets of the system
specified in the Transaction (the "System") with non-firm transmission to and
from the Delivery Point, unless a different Transmission Contingency is
specified in a Transaction. Seller's failure to deliver shall be excused: (i) by
an event or circumstance which prevents Seller from performing its obligations,
which event or circumstance was not anticipated as of the date the Transaction
was agreed to, which is not within the reasonable control of, or the result of
the negligence of, the Seller, (ii) by Buyer's failure to perform; (iii) to the
extent necessary to preserve the integrity of, or prevent or limit any
instability on, the System; (iv) to the extent the System or the control area or
reliability council within which the System operates declares an emergency
condition, as determined in the system's, or the control area's, or reliability
council's reasonable judgment; or (v) by the interruption or curtailment of
transmission to the Delivery Point or by the occurrence of any Transmission
Contingency specified in a Transaction as excusing Seller's performance. Buyer's
failure to receive shall be excused (i) by Force Majeure; (ii) by Seller's
failure to perform, or (iii) by the interruption or curtailment of transmission
from the Delivery Point or by the occurrence of any Transmission Contingency
specified in a Transaction as excusing Buyer's performance. In any of such
events, neither party shall be liable to the other for any damages, including
any amounts determined pursuant to Article Four.

     "Transmission Contingent" means, with respect to a Transaction, that the
performance of either Seller or Buyer (as specified in the Transaction) shall be
excused, and no damages shall be payable including any amounts determined
pursuant to Article Four, if the transmission for such Transaction is
unavailable or interrupted or curtailed for any reason, at any time, anywhere
from the Seller's proposed generating source to the Buyer's proposed ultimate
sink, regardless of whether transmission, if any, that such Party is attempting
to secure and/or has purchased for the Product is firm or non-firm. If the
transmission (whether firm or non-firm) that Seller or Buyer is attempting to
secure is from source to sink is unavailable, this contingency excuses
performance for the entire Transaction. If the transmission (whether firm or
non-firm) that Seller

                                       47

<PAGE>

or Buyer has secured from source to sink is interrupted or curtailed for any
reason, this contingency excuses performance for the duration of the
interruption or curtailment notwithstanding the provisions of the definition of
"Force Majeure" in Article 1.23 to the contrary.

     "Unit Firm" means, with respect to a Transaction, that the Product subject
to the Transaction is intended to be supplied from a generation asset or assets
specified in the Transaction. Seller's failure to deliver under a "Unit Firm"
Transaction shall be excused: (i) if the specified generation asset(s) are
unavailable as a result of a Forced Outage (as defined in the NERC Generating
Unit Availability Data System (GADS) Forced Outage reporting guidelines) or (ii)
by an event or circumstance that affects the specified generation asset(s) so as
to prevent Seller from performing its obligations, which event or circumstance
was not anticipated as of the date the Transaction was agreed to, and which is
not within the reasonable control of, or the result of the negligence of, the
Seller or (iii) by Buyer's failure to perform. In any of such events, Seller
shall not be liable to Buyer for any damages, including any amounts determined
pursuant to Article Four.

                                       48

<PAGE>

                                    EXHIBIT A
                               CONFIRMATION LETTER

The following terms and conditions shall govern the transaction agreement
("Agreement") between Arizona Public Service Company ("APS" or "Buyer") and
Snowflake White Mountain Power, LLC ("SWMP" or "Seller") entered into pursuant
to and in accordance with the EEI Master Power Purchase and Sale Agreement (the
"Master Agreement") dated _______________ (the "Effective Date"). Terms used but
not defined herein shall have the meanings set forth in the Master Agreement

In consideration of the premises and the agreements contained herein, APS and
SWMP agree as follows:

Buyer:                               ___________________________________________

Seller:                              ___________________________________________

Product:                             ___________________________________________

Contract Quantity:                   ___________________________________________

Delivery Point:                      ___________________________________________

Delivery Period:                     ___________________________________________

Days of Week:                        ___________________________________________

Hours:                               ___________________________________________

Power Purchase, Energy Payment:      ___________________________________________

Certificates for Renewable Energy:   ___________________________________________

ARIZONA PUBLIC SERVICE COMPANY          SNOWFLAKE WHITE MOUNTAIN POWER LLC
APS OR BUYER                            SWMP OR SELLER

By:                                     By:
    ---------------------------------       ------------------------------------
Name:                                   Name:
      -------------------------------         ----------------------------------
Title:                                  Title:
       ------------------------------          ---------------------------------
Date:                                   Date:
      -------------------------------         ----------------------------------

                                       49<PAGE>

                                             * TEXT OMITTED AND FILED SEPARATELY
                                               CONFIDENTIAL TREATMENT REQUESTED
                                           UNDER 17 C.F.R. SECTION 200.80(b)(4),
                                                            200.83 AND 240.24b-2

                                                                   Exhibit 10.20

                                                          APS CONTRACT NO. 85327

                                   (APS LOGO)

                  AMENDED AND RESTATED TRANSACTION CONFIRMATION

Effective as of September 6, 2005 Arizona Public Service Company ("APS" or
"Buyer") and Snowflake White Mountain Power, LLC ("SWMP" or "Seller") entered
into a transaction agreement (the "Original Agreement") pursuant to and in
accordance with the EEI Master Power Purchase and Sale Agreement (the "Master
Agreement") dated September 6, 2005. The following amended and restated terms
and conditions shall supersede and replace the terms and conditions of the
Original Agreement and shall govern the transaction agreement (the "Agreement")
between Buyer and Seller, effective as of Aug 16th, 2006 (the "Effective Date").
Terms used but not defined herein shall have the meanings set forth in the
Master Agreement.

In consideration of the premises and the agreements contained herein, APS and
SWMP agree as follows:

<TABLE>
<S>                   <C>
Seller                SWMP.

Buyer:                APS.

Project:              SWMP intends, at its sole cost and expense, to design,
                      construct, and operate the power generation facility
                      located near Snowflake, Arizona, utilizing biomass as the
                      fuel for the facility (the "Project"). The total gross
                      electrical generating capacity of the Project is
                      approximately 24.5 MW per hour, and the total net
                      electrical generating capacity of the Project is
                      approximately 20.8 MW per hour. The average gross annual
                      generation of the Project is approximately 200,900
                      megawatt hours, and the average net annual generation of
                      the Project is approximately 170,560 megawatt hours.

Product:              Unit Contingent with Liquidated Damages

Contract  Quantity:   SWMP has contracted with a third party for the sale and
                      purchase of the first 10 MW per hour of energy generated
                      by the Project (the "Third Party Contract Quantity").
                      During the Term of this Agreement, SWMP shall schedule and
                      deliver to APS at the Delivery Point and APS shall accept
                      and purchase from SWMP at the Delivery Point all energy
                      and associated Environmental Attributes generated by the
                      Project in excess of the Third Party Contract Quantity up
                      to an annual contract quantity of 127,020 megawatt hours
                      ("Contract Quantity"). Under no circumstances shall SWMP
                      deliver energy to APS that is not generated by the
                      Project. The Parties shall use metered data to verify
                      actual volumes. Should an outage or curtailment occur at
                      the Project for any reason, SWMP shall deliver the first
                      10 MW of available energy to such third party and shall
                      deliver the remainder to APS according to the terms set
                      forth in this Agreement and the Master Agreement.
</TABLE>

1

<PAGE>

<TABLE>
<S>                   <C>
                      In no event may Seller substitute or deliver energy from
                      sources other than the Project for sale to APS, nor may
                      APS require SWMP to make such substitutions.

                      During the term of this Agreement, SWMP may supply its own
                      power to serve its parasitic load or APS may supply such
                      power pursuant to a separate retail contract. SWMP shall
                      provide written notice to APS promptly upon determining
                      whether it will supply its own power or have APS supply
                      such power. This notice requirement shall also apply to
                      any change in the source of power supply throughout the
                      term of this Agreement.

                      If after the Summer Delivery Period ("Summer Delivery
                      Period" means June through September), SWMP has not
                      delivered to APS at the Delivery Point 26,352 MWhs of the
                      Contract Quantity SWMP shall pay damages pursuant to
                      Section 4.1 of the Master Agreement in an amount for such
                      deficiency equal to the positive difference, if any,
                      obtained by subtracting the energy portion of the Contract
                      Price from the Index Price. For purposes of this
                      Transaction, the Parties shall use the Palo Verde
                      Intercontinental Exchange (ICE) Index Price(1). The
                      weighted average of On-Peak prices and Off Peak prices
                      shall be used to create a 7 x 24 average value. Similarly,
                      if, after the Non-Summer Delivery Period ("Non-Summer
                      Delivery Period" means October through May), SWMP has not
                      delivered to APS at the Delivery Point a total of 50,572
                      MWhs of the Contract Quantity and SWMP shall pay damages
                      pursuant to Section 4.1 of the Master Agreement in an
                      amount for such deficiency equal to the positive
                      difference, if any, obtained by subtracting the energy
                      portion of the Contract Price from the Index Price.

                      At the end of the Contract Year, for any RECs associated
                      with the energy not delivered by SWMP to APS at the
                      Delivery Point, SWMP may deliver replacement RECs from an
                      alternate renewable energy generation facility so long as
                      the replacement RECs comply with the requirements as to
                      RECs under the Environmental Portfolio Standards as
                      established by the Arizona Corporation Commission. If SWMP
                      does not deliver the total number of RECs associated with
                      the Contract Quantity, SWMP must pay to APS, at APS' sole
                      discretion, the REC portion of the Contract Price or APS'
                      actual replacement costs for each REC that it fails to
                      deliver.
</TABLE>

----------
(1)  If the ICE Index shall cease to exist at any time during the term of this
     Transaction the Parties shall use their best and reasonable efforts to
     agree upon a replacement index.

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* Confidential Treatment Requested.

2

<PAGE>

<TABLE>
<S>                   <C>
Delivery Point:       At the busbar tie-in point on the low voltage side of the
                      Abitibi Substation.

Delivery Period:      The period commencing at 12:00:01 a.m. PST on the Delivery
                      Commencement Date and ending at hour ending 2400 PST on
                      the day before the fifteenth (15th) anniversary of the
                      Delivery Commencement Date.;

                      "Delivery Commencement Date" means the earlier to occur of
                      (i) July 1, 2008, or (ii) the Commercial Operation Date of
                      the Project.

Commercial            "Commercial Operation Date" means the date on which each
                      of the following

Operation Date:       conditions precedent for operation of the Project has been
                      satisfied or waived in writing by SWMP or the Parties, as
                      applicable:

                      (a)  SWMP shall have obtained all governmental and
                           regulatory authorizations required for the
                           construction, ownership operation and maintenance of
                           the Project and for the sale of capacity and energy
                           there from;

                      (b)  SWMP shall have obtained financing in connection with
                           the construction, ownership, operation and
                           maintenance of the Project on terms and conditions
                           reasonably acceptable to SWMP;

                      (c)  SWMP shall have entered into an interconnection
                           agreement on terms and conditions reasonably
                           acceptable to both Parties;

                      (d)  SWMP shall have secured transmission rights on terms
                           and conditions reasonably acceptable to both Parties;

                      (e)  the interconnection facilities are complete and in
                           operation and are capable of accepting, transmitting
                           and delivering energy to the Delivery Point;

                      (f)  all documents necessary for the operation of the
                           units and the transmission of the output of the
                           Project have been fully executed; specifically, those
                           documents between SWMP and the Host Control Area for
                           transmission services have been fully executed;

                      (g)  SWMP is otherwise capable of delivering all
                           designated energy and/or capacity to APS at the
                           Delivery Point.

                      SWMP shall present to APS a certificate from an
                      independent engineer, who shall be mutually agreed upon by
                      the Parties, verifying that the foregoing conditions
                      precedent have been satisfied or waived.

                      In the event that any of the conditions precedent set
                      forth above have not been satisfied or expressly waived in
                      writing by SWMP or both Parties, as applicable, by July 1,
                      2008, SWMP or either Party, as applicable, shall have the
                      right to terminate this Agreement upon written notice to
                      the other. Upon such termination, neither Party shall owe
                      any obligations
</TABLE>

----------
* Confidential Treatment Requested.

3

<PAGE>

<TABLE>
<S>                   <C>
                      whatsoever to the other relating to this Agreement or the
                      Project, or any output from the Project, nor shall either
                      Party be liable to the other Party for any Project except
                      with respect to Sections 10.4 and 10.11 of the Master
                      Agreement. If SWMP expressly and in writing waives any of
                      the conditions precedent set forth in clauses (a), (b),
                      (e), (f), (g) or (h) above, or if both Parties expressly
                      and in writing agree to waive either of the conditions
                      precedent set forth in clauses (c) or (d) above, such
                      condition shall no longer be a condition precedent to the
                      effectiveness of SWMP's or the Parties', as applicable,
                      obligations under this Agreement.

                      The Commercial Operation Date may be extended beyond July
                      1, 2008, for Force Majeure, provided that the Commercial
                      Operation Date shall occur no later, under any
                      circumstances, than July 1, 2009. If the Project has not
                      achieved Commercial Operation by July 1, 2009, APS has, in
                      its sole discretion, the option to terminate this
                      Agreement and, in such case, neither Party shall owe any
                      obligations whatsoever to the other relating to this
                      Agreement, the Project, or any output from the Project,
                      nor shall either Party be liable to the other Party for
                      any claimed costs, expenses or damages arising directly or
                      indirectly out of this Agreement, the Project or any
                      output from the Project, except with respect to Sections
                      10.4 and 10.11 of the Master Agreement.

Days of Week:         Monday through Sunday, including NERC Holidays.

Hours:                7 x 24.

Power Purchase,       For each Contract Year of the Delivery Period, APS shall
Energy Payment:       pay SWMP for energy from the Project, delivered to APS at
                      the Delivery Point at the following rate:

                              For all energy delivered during the Delivery
                              Period, the Contract Price shall be $[*] per
                              MWh, adjusted annually on each anniversary of the
                              Delivery Commencement Date by multiplying the then
                              current Contract Price by [*].

Certificates for      In consideration of APS' purchase of the energy from the
Renewable  Energy:    Project, and the associated Environmental Attributes, on
                      or before the 30th day following the end of each Delivery
                      Year, SWMP shall complete and provide to APS an
                      Environmental Attribute Certificate and Bill of Sale in
                      the form attached hereto as Annex 1 designating, for the
                      previous Delivery Year: (i) the quantity of energy and
                      associated Environmental Attributes created in MWh by
                      month; (ii) the location and name of the generator used to
                      create and deliver the Environmental Attributes; and (iii)
                      the date the generator used to create and deliver the
                      Environmental Attributes began operation.
</TABLE>

----------
* Confidential Treatment Requested.

4

<PAGE>

<TABLE>
<S>                   <C>
Transmission:         SWMP shall be responsible for constructing and/or
                      purchasing all interconnection facilities and transmission
                      rights necessary to deliver power from the Project to the
                      Delivery Point.

Telemetry:            SWMP and APS shall establish mutually agreeable telemetry
                      and operating procedures to enable the Host Control Area
                      to dynamically schedule the power to the Buyer at the
                      Delivery Point. SWMP shall be responsible for all costs of
                      such telemetry equipment purchase, installation and
                      maintenance.
</TABLE>

ARIZONA PUBLIC SERVICE COMPANY          SNOWFLAKE WHITE MOUNTAIN POWER LLC
APS OR BUYER                            SWMP OR SELLER

/s/ Barbara D. Lockwood                 /s/ Robert M. Worsley
-------------------------------------   ----------------------------------------
NAME: Barbara D. Lockwood               NAME: Robert M. Worsley
TITLE: Manager, Renewable Energy        TITLE: Ceo
DATE: August 16, 2006                   DATE: August 16, 2006

----------
* Confidential Treatment Requested.

5

<PAGE>

                                     ANNEX 1

              Environmental Attribute Certificate and Bill of Sale

Snowflake White Mountain Power, LLC ("Seller") hereby sells, transfers and
delivers to Arizona Public Service Company ("Buyer") the Environmental
Attributes associated with the generation of the indicated energy for delivery
to the grid (as such term(s) are defined in the MASTER POWER PURCHASE AND SALE
AGREEMENT dated September 6, 2005 between Seller and Buyer) arising from the
generation for delivery to the grid of the energy by the:

(name of renewable energy generation facility)

Fuel Type: ______________ Capacity (MW):____________ Operational Date:__________

As applicable: (State) Reg. no. _____ Energy Admin. ID no._________ ID no. _____

                               Dates                     MWh generated
                                __________________________________, 20__________

in the amount of one Environmental Attribute or its equivalent for each megawatt
hour generated; and Seller further attests, warrants and represents as follows:

i)   to the best of its knowledge, the information provided herein is true and
     correct;

ii)  its sale to Buyer is its one and only sale of the Environmental Attributes
     with respect to the energy referenced herein;

iii) the (name of renewable energy generation facility) generated and delivered
     to the grid the energy in the amount indicated above during the period
     indicated above; and

[check one:]

[ ]  iv)  Seller owns the (name of renewable energy generation facility).

[ ]  iv)  to the best of Seller's knowledge, each of the
          Environmental Attributes associated with the generation of the
          indicated energy for delivery to the grid have been generated and
          sold by the (name of renewable energy generation facility).

This serves as a bill of sale, transferring from Seller to Buyer all of Seller's
right, title and interest in and to the Environmental Attributes associated with
the generation of the above referenced energy for delivery to the grid.

Contact Person: ____________ phone: ____________; fax: _______________________

WITNESS MY HAND,

Snowflake White Mountain Power, LLC

By
   ----------------------------------
Its
    ---------------------------------
Date
     --------------------------------

----------
* Confidential Treatment Requested.

6

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