Document:

Exhibit 10.3.11

                              AMENDED AND RESTATED

                       POWER PURCHASE AND SALES AGREEMENT

                                     BETWEEN

                                 MAMMOTH-PACIFIC

                                       AND

                       SOUTHERN CALIFORNIA EDISON COMPANY

                              EXISTING FACILITY G1

12/01/86

                                TABLE OF CONTENTS

SECTION                               TITLE                                 PAGE

1.  PARTIES................................................................    1

2.  RECITALS...............................................................    1

3.  AGREEMENT..............................................................    2

4.  DEFINITIONS............................................................    3

5.  TERM AND TERMINATION...................................................    7

6.  POWER SALES............................................................    8

7.  PROJECT LAND...........................................................   10

8.  OWNERSHIP AND CONTROL OF PROJECT.......................................   11

9.  DESIGN AND CONSTRUCTION OF PROJECT.....................................   12

10. OPERATION OF PROJECT...................................................   13

11. INTERCONNECTION FACILITIES.............................................   16

12. DELIVERY AND MEASUREMENT OF NET ENERGY.................................   16

13. SALE OF PROJECT........................................................   17

14. ABANDONMENT............................................................   19

15. AGREEMENT PRICE, MEGAWATTHOUR ("MWH")
    CREDIT ACCUMULATION AND REPAYMENT, AND
    BASE CAPACITY PRICE ADJUSTMENTS........................................   21

16. TAXES..................................................................   28

17. BILLING AND PAYMENT....................................................   29

18. OPERATING REPRESENTATIVES..............................................   30

19. LIABILITY..............................................................   30

20. INSURANCE..............................................................   32

21. WAIVERS................................................................   33

22. SECURITY...............................................................   33

23. UNCONTROLLABLE FORCES..................................................   34

24. ASSIGNMENT OF RIGHTS...................................................   35

25. DISPUTES...............................................................   36

26. LIENS AND ENCUMBRANCES.................................................   36

27. DISCLAIMER.............................................................   37

28. CONFIDENTIAL AND PROPRIETARY INFORMATION...............................   38

29. NO THIRD PARTY BENEFICIARIES...........................................   39

30. NONDEDICATION OF FACILITIES............................................   39

31. NOTICES................................................................   40

32. GOVERNING LAW..........................................................   40

33. GENERAL PROVISION......................................................   40

34. SIGNATURE CLAUSE.......................................................   41

    EXHIBIT A -   METERING ARRANGEMENT.....................................  A-1

    EXHIBIT B -   DEED OF TRUST, ASSIGNMENT OF RENTS,
                  AND SECURITY AGREEMENT...................................  B-1

    EXHIBIT C -   FINANCING STATEMENT......................................  C-1

    EXHIBIT D -   MAGMA LEASE..............................................  D-1

    EXHIBIT E -   POWER PURCHASE AND SALES
                  TERMINATION AGREEMENT....................................  E-1

    EXHIBIT F -   EFFECTIVE NET CAPACITY AND NET
                  CAPACITY.................................................  F-1

    EXHIBIT G -   GUARANTY AGREEMENT.......................................  G-1

                              AMENDED AND RESTATED
                       POWER PURCHASE AND SALES AGREEMENT

1. PARTIES:

     1.1 The Parties to this Amended and Restated Power Purchase and Sales
Agreement are: Mammoth-Pacific ("Seller"), a California general partnership, and
Southern California Edison Company ("Edison"), a California corporation,
individually "Party", and collectively, "Parties."

2. RECITALS: This Agreement is made with reference to the following facts, among
others:

     2.1 This is an Amended and Restated Power Purchase and Sales Agreement
which supercedes and replaces, in all terms and conditions, the original Mammoth
Power Purchase and Sales Agreement between Mammoth Binary Power Company and
Southern California Edison Company, executed on October 20, 1983, and assigned
to Mammoth Pacific on October 20, 1983, and Amendment No. 1 thereto, executed
on December 30, 1983;

     2.2 This Amended and Restated Power Purchase and Sales Agreement provides
for the following revisions, among others; restructuring of payment provisions
for energy and capacity purchased by Edison, redefining the "Megawatt Hour
Credit Accummulation," providing additional financial security to Edison and
outlining Seller's option to supply power from the Generating Facility for
operation of the Geothermal Facility and the Generating Facility;

     2.3 This Amended a Restated Power Purchase and Sales Agreement is made and
entered into with reference to the concurrent execution of that certain Power
Purchase and Sales Termination Agreement, which is set forth as Exhibit E,
attached hereto and made part hereof by this reference, by which Pacific
Lighting Energy Systems, a California Corporation, the owner of all the capital
stock of Pacific Geothermal Company, a California Corporation, (successor in
interest to Pacific Energy Resources, Inc. a wholly owned subsidiary of Pacific
Lighting Energy Systems), and general partner of Seller, will terminate those
certain landfill project Power Purchase and Sales Agreements identified therein;

     2.4. Seller desires to construct, own, operate and control a 10 MW (gross)
generating facility to be located near Casa Diablo Hot Springs, California
beginning in 1984 for a term of thirty years;

     2.5 The Generating Facility is presently in operation, with a Date of
Initial Delivery of November 26, 1984, and a date of Firm Operation of February
26, 1985;

     2.6 Edison desires to purchase Net Energy and capacity to be made available
by Seller to Edison from the Project;

     2.7 The Parties desire that the Project be operated and maintained as a
base load generating resource for the Edison electric system;

     2.8 The Parties desire, by this Agreement, to establish the terms,
conditions and obligations pursuant to which they can accomplish the above
desires and needs.

3.   AGREEMENT: The Parties agree as follows:

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4. DEFINITIONS: When used with initial capitalization, whether in the singular
or in the plural, the following terms shall have the following meanings:

     4.1 Agreement: This "Amended and Restated Power Purchase and Sales
Agreement Between Mammoth-Pacific and Southern California Edison Company," and
Exhibits thereto, as may be amended from time to time.

     4.2 Agreement Price: The price, expressed in cents per kilowatthour, paid
by Edison to Seller for Net Energy delivered and Net Capacity made available
under the terms of this Agreement. The Agreement Price includes the Base
Capacity Price.

     4.3 Auxiliary Components: All equipment necessary for the operation and
maintenance of the Project except the Geothermal Facilities.

     4.4 Auxiliary Load: That energy necessary to meet the electrical
requirements of the Auxiliary Components. Such requirements shall approximate
3,000 kilowatts (kW) as delivered over a period of time.

     4.5 Avoided Cost: For the purposes of this Agreement, "Avoided Cost" shall
be equal to the time period weighted average cost of energy as reflected in
Edison's Published avoided cost plus the Base Capacity Price converted to d/kWh.
If no applicable Published avoided cost of energy or Base Capacity Price is
available, an avoided cost of energy and Base Capacity Price shall be determined
in a manner consistent with the methodology used for the most current avoided
cost of energy and Base Capacity Price.

                                       3

     4.6 Base Capacity Price: For the purposes of this Agreement, the Base
Capacity Price shall be 1.94(cent) per kWh. The Base Capacity Price is the
capacity price currently Published in the Annual Capacity-Payment Schedule for
Standard Offer No: 2 Firm Power Purchases, effective February 14, 1983 for
30-year power purchase contracts with an initial date of operation in 1984. The
Published capacity price ($137 per kW per year) has been adjusted by a factor of
1.24 to conform with the change in capacity price methodology ordered by the
Commission in Decision No. 82-12-120. The Base Capacity Price may change if the
Date of Initial Delivery does not occur in 1984.

     4.7 Commission: The Public Utilities Commission of the State of California.

     4.8 Control: To establish the electrical output of the Project through
dispatching procedures including shutdown and startup procedures.

     4.9 Date of Initial Delivery: The date when Seller initially delivers Net
Energy to the Point of Interconnection.

     4.10 Date or Firm Operation: The applicable date mutually agreed upon by
the Operating Representatives on which one or both generating units of the
Project are determined to be a reliable source of generation and when such unit
or units can reasonably be expected to operate continuously and reliably at the
applicable Net Capacity.

     4.11 Edison Electric System Integrity: A state of being which contemplates
the normal operation of the Edison electric system in a manner which minimizes
risks of

                                       4

injury to persons and/or damage to, or loss of, property and enables Edison to
provide reliable electric service.

     4.12 Effective Net Capacity: A nominal value of Net Capacity, expressed in
megawatts (MW), selected by the Operating Representatives for use in determining
the Monthly Capacity Factor. The Effective Net Capacity shall be established and
agreed upon by the Operating Representatives as set forth in Exhibit F, attached
hereto and made part hereof by this reference.

     4.13 Emergency: A condition or situation which, in Edison's sole judgment,
affects Edison's ability to provide reliable electric service.

     4.11 Generating Facility: All of Seller's generators, together with all
protective and other associated equipment and improvements, necessary to produce
electrical power at Seller's Facility excluding associated land, land rights,
and interests in land.

     4.15 Geothermal Facilities: The geothermal fluid gathering and disposal
system, including all pipes, valves, pumps, meters and electrical equipment,
which are utilized in conjunction with the Project.

     4.16 Interconnection Facilities: Those protection, metering, electric
line(s) and other Facilities required, in Edison's sole judgment, to permit
connection of the Edison electric system and the Project at the Point of
Interconnection.

     4.17 Magma: Magma Energy, Incorporated, a Nevada corporation.

                                       5

     4.18 Magma Lease: The lease agreement between Holt Geothermal Company and
Magma which has been, or is to be, assigned to Seller and is attached hereto as
Exhibit D.

     4.19 Magma Resource: The geothermal reservoir underlying the land owned in
fee by Magma as described in the Magma Lease.

     4.20 Monthly Capacity Factor: For each month, the Net Energy delivered to
Edison, expressed in megawatthour (Kwh), divided by the product of Effective Net
Capacity, expressed in megawatts (MW), and the sum representing the total hours
in the month less the number of hours of curtailment in the month resulting from
requests by Edison pursuant to Section 8.2, Uncontrollable Forces and Project
scheduled outages. For the purpose of determining the Monthly Capacity Factor,
scheduled outage hours shall be limited to a maximum of 480 hours per unit per
year.

     4.21 Net Capacity: Gross generating capacity of the Project less the
capacity requirements of the Auxiliary Components, expressed in megawatts (MW).
Net Capacity available to Edison will vary with ambient temperature, as set
forth in Exhibit F, with one and two generting units in operation.

     4.22 Net Energy: Total electrical energy, expressed in kilowatthours (kWh)
or megawatthours (MWh), generated by the Project less all Auxiliary Load energy
requirements provided by the Project.

     4.23 Operating Representatives: Representatives of the Parties appointed
pursuant to Section 18.

                                       6

     4.24 Point of Interconnection: The point at the Seller's 33 kilovolt (kV)
dead end structure in the Project switchyard where Edison's electrical
conductors connect with Seller's electrical conductors and where Net Energy is
transferred from the Project to Edison.

     4.25 Project: Seller's electric generating facility which shall consist of
two (2) independent 5 MW (gross) binary cycle generating units with a total
design rating of 10 MW (gross), including facilities appurtenant to, or
incidental to, said units. The Project shall not include, among other things,
the Interconnection Facilities or the Geothermal Facilities or any land, land
rights or interests in land associated with such facilities.

     4.26 Published: For the purposes of this Agreement, "Published" is defined
as publication by, or for, Edison in accordance with any order or decision by
the Commission.

     4.27 Quarter: A calendar quarter of three months ending on the last day of
March, June, September or December.

5. TERM AND TERMINATION:

     5.1 This Agreement shall become effective when executed by the Parties and
shall remain in effect until terminated pursuant to any of the following:

          5.1.1 Upon not less than five (5) years prior written notification by
either Party to the other Party, which notification shall not be given prior to
the expiration of twenty-five years from the Date of Firm Operation; or

                                       7

          5.1.2 If the Date of Initial Delivery does not occur prior to January
1, 1985, or if the Date of Firm Operation does not occur prior to March 1, 1985,
unless otherwise agreed to, in writing, by the Parties; or

          5.1.3 Should Edison, or any Edison subsidiary or affiliate designated
by Edison in its sole judgment, exercise Edison's rights pursuant to Section 13
or Section 14.2.

6. POWER SALES:

     6.1 Subject to the terms and conditions of this Agreement, Seller hereby
agrees to deliver and sell to Edison, and Edison hereby agrees to accept and
purchase from Seller, all Net Energy delivered and all Net Capacity made
available by Seller to Edison at the Point of Interconnection.

     6.2 Upon request by Seller, Edison shall supply, and Seller shall purchase,
capacity and energy in amounts necessary to meet the Project's start-up and
Auxiliary Load requirements. Seller shall pay Edison for such capacity and
energy in accordance with Edison's time-of-use energy tariff for electric
service exceeding 500 kW, as now in effect or as may hereafter be authorized by
the Commission to be revised ("Tariff Schedule TOU-8").

     6.3 Seller shall use its best efforts to design, construct; operate and
maintain the Project so as generate the maximum amount of Net Energy and
associated Net Capacity.

                                       8

     6.4 Seller shall operate the Project as a base load facility with a planned
long-term annual capacity factor of 75% in accordance with generally accepted
practices in the electric utility industry in the State of California.

     6.5 If Seller desires to develop any additional capacity from the Magma
Resource, Edison shall have the right to Purchase such additional capacity and
associated energy therefrom. If the Parties are unable to reach a satisfactory
agreement and such additional capacity and associated energy is offered to any
other party or parties, Edison shall have the right to purchase such capacity
and energy under the same terms and conditions as those under which Seller is
willing to sell, and another party or parties are willing to purchase, the
additional capacity and associated energy.

     6.6 Seller shall have an option to elect to provide power for the operation
of the Geothermal Facilities from its own Generating Facility or to purchase
such power from Edison. If Seller elects to exercise such option, Seller shall
give Edison prior written notice thereof. If Seller elects to exercise such
option, this Agreement shall be amended to provide appropriate reimbursement to
Edison for interconnection facilities. If metering changes are required to
implement the exercise of such option, such changes shall be at the expense of
Seller. If such option is exercised by Seller, then Seller shall repay unearned
capacity payments in accordance with the following formula calculated for each
year of delivery until the date Seller begins serving the Geothermal Facilities
from its own generating facility:

                                       9

                 Reduction in annual average contract capacity x
                        annual average contract capacity

              ($0.0194/kWh - annual as-available"
                             capacity price $/kWh) x
                             (annual kWh purchased
                             by Edison)

             "     From Edison's Standard Offer No. 1 capacity table.

7. PROJECT LAND:

     7.1 Seller, at no cost to Edison, shall acquire and own all land, land
rights and interests in land necessary for Seller to construct, operate and
maintain the Project.

     7.2 Edison shall, as it deems necessary or desirable, build electric lines
and facilities, both overhead and underground, and install metering and any
other equipment, for the purpose of effecting the arrangements contemplated in
this Agreement. The aforementioned shall be done after satisfaction of the
requirements of Sections 7.3 and 7.4. The physical location of such electrical
lines, facilities, metering and any other equipment shall be determined by
agreement of the Parties.

     7.3 Seller shall reimburse Edison for the cost of any property rights or
interests which are required by Edison to meet its obligations under this
Agreement.

     7.4 Seller shall grant to Edison, without cost to Edison, and by a mutually
acceptable instrument(s) the following:

          7.4.1 Rights-of-way, licenses, easements and all other rights and
interests necessary to construct, reconstruct, use, maintain, alter, add to,
enlarge, repair, replace, inspect or remove, at any time, the electric lines and
facilities, both overhead and

                                       10

underground, or any other equipment installations required by Edison to effect
the arrangements contemplated in this Agreement. The contemplated arrangements
include those necessary to install, operate and maintain the meters for the
Geothermal Facilities (Meters 1-A, 2-A and 1-B, 2-B) and the 33 kV meters, both
as depicted in Exhibit A, and the arrangements necessary to supply capacity and
energy to the Geothermal Facilities;

          7.4.2 Rights of ingress and egress at all reasonable times necessary
for Edison to perform any one or more of the activities contemplated in this
Agreement;

     7.5 The electric lines, facilities, metering and/or any other equipment
referred to in this Section 7 installed by Edison, shall be, and shall remain,
the property of Edison; and

     7.6 All rights or interests granted by Seller to Edison pursuant to this
Section 7 shall be coterminous with this Agreement.

8. OWNERSHIP AND CONTROL OF PROJECT:

     8.1 Seller, at no cost to Edison, shall own the Project and shall design,
construct, operate and maintain the Project in accordance with good engineering
and operating practices in California.

     8.2 Seller shall Control the Project. However, to facilitate maintenance of
Edison facilities, or during periods of Emergency, or to maintain Edison
Electric System Integrity, Seller shall, if requested by Edison, and at no cost
or obligation to Edison: (i) disconnect the Project from the Edison electric
system or (ii) reduce the electrical output of the Project to the level of the
Project's total electrical requirement, as appropriate.

                                       11

Each Party shall endeavor to correct within a reasonable period the conditions
on its facilities and/or system which necessitate such disconnection or
reduction of output. Such disconnection or reduction of electrical output shall
be limited to the period of time such condition exists.

9. DESIGN AND CONSTRUCTION OF PROJECT:

     9.1 Seller, at no cost to Edison, shall acquire all permits and approvals,
and complete, or have completed, all environmental impact studies required for
the construction, operation and maintenance of the Project.

     9.2 Edison shall have the right to review the electrical drawings
pertaining to the design of the Project and the Point of Interconnection. Such
review shall be done in a timely manner and may include, but not be limited to,
the generator, governor, excitation system, sychronizing equipment, protective
relays and neutral grounding.

     9.3 Edison shall have the right to require modifications to the design of
the Project and/or the Point of Interconnection as it deems necessary for proper
and safe operation of the Project when in parallel with the Edison electric
system. If Seller does not agree to such modifications, the differences between
the Parties shall be resolved pursuant to Section 25 prior to design approval.

     9.4 Seller shall furnish, install, operate and maintain in good order and
repair and without cost to Edison, the relays, meters, power circuit breakers,
synchronizer and other control and protective apparatus as shall be agreed to by
the Parties pursuant to Section 9.3.

                                       12

     9.5 Future changes on the Edison electric system and/or to the Project may
require modification of the design of the Project or the Point of
Interconnection. Any such modification, whether proposed by Edison or Seller,
shall be subject to the provisions of this Section 9.

     9.6 Edison shall have the right to monitor the construction, start-up,
operation and maintenance of the Project and have the right to consult with, and
make recommendations, to Seller's Operating Representative.

     9.7 Seller shall furnish to Edison the Project construction schedule and
shall notify Edison, at last one (1) year prior to the Date of Firm Operation,
of any changes in such schedule which affect the Date of Firm Operation.

     9.8 Edison shall have full access to all Project operations a have the
right to use, solely for itself, free of royalty payments, any technological
innovations developed by Seller in producing Net Energy from the Magma Resource.
Edison shall have full access to all operating data and input regarding
operation of the Project and the Geothermal Facilities. Except as otherwise
legally required, Edison shall not disclose such information to others without
first obtaining written permission from Seller.

10. OPERATION OF PROJECT:

     10.1 Seller shall operate and maintain the Project and the Project's
protective apparatus in accordance with applicable electric utility industry
standards and good engineering practices with respect to synchronizing, voltage
and reactive power control. Seller shall operate the Project with all protective
apparatus in service whenever the

                                       13

Project is connected to, or is operated in parallel with, the Edison electric
system. Any deviation for brief periods of emergency or maintenance shall only
be by agreement of the Parties.

     10.2 Each Party shall keep the other Party's Operating Representative
informed as to the operating schedule of its respective facilities affecting the
other Party's operation hereunder, including any reduction in Net Capacity. In
addition, Seller shall provide Edison with reasonable advance notice regarding
its scheduled outages, including any reduction in Net Capacity availability in
accordance with the following:

         SCHEDULED OUTAGE                            ADVANCE NOTICE
         EXPECTED DURATION                           TO EDISON
         -----------------                           -----------------------
         Less than one day                           24 Hours
         One day or more (except major overhaul)      1 Week
         Major Overhaul                               6 Months

     10.3 Notification by a Party's Operating Representative of outage date and
duration should be provided to the other Party's Operating Representative by
telephone.

     10.4 Seller shall use its best efforts to schedule outages during the
off-peak hours as specified in Edison's Tariff Schedule TOU-8 and during
expected minimal generation periods as agreed upon by the Operating.
Representatives.

     10.5 Seller shall maintain an operating log at the Project with records of:
real and reactive power production, changes in operating status, outages,
protective apparatus operations and any unusual conditions found during
inspections. In addition, Seller shall maintain records applicable to the
Project, including the electrical characteristics of the generator and settings
or adjustments of the generator control equipment and protective

                                       14

devices. Seller shall make such information available to Edison upon request and
shall provide copies of such operating log and records, if requested, to Edison
within thirty days of Edison's request.

     10.6 If, at any time, Edison has reason to doubt the integrity of any of
the Project's protective apparatus and believes that such loss of integrity
would be hazardous to the Edison Electric System Integrity, Seller shall
demonstrate, to Edison's satisfaction, the correct calibration and operation of
the equipment in question.

     10.7 Seller shall test all protective devices with qualified personnel at
intervals not to exceed four (4) years.

     10.8 Seller shall notify Edison at least fourteen calendar days prior to:
(i) initial energizing of the Point of Interconnection; (ii) initial parallel
operation of each of the Project's generators; and (iii) initial testing of the
Project's protective apparatus. Edison shall have the right to have a
representative present at such times.

     10.9 Seller shall, to the extent possible, provide reactive power for its
own requirements and, where applicable, the reactive power losses of interfacing
transformers. Seller shall not deliver excess reactive power to Edison unless
otherwise agreed upon by the Parties.

     10.10 Edison shall install, at Seller's cost, telemetering equipment for
the purpose of monitoring the operation of the Project generators. Seller shall,
as required by Edison, install additional meters, at a location within the
Project, as agreed upon by both Parties, to enable Seller to make daily
telephone reports in the event telemetering

                                       15

equipment is inoperative. All costs of additional meter equipment, installation,
ownership and administration shall be borne by Seller, including costs incurred
by Seller for inspecting and testing such equipment.

11. INTERCONNECTION FACILITIES:

     11.1 Edison,, at no cost to Seller shall own the Interconnection Facilities
and shall design, construct, operate and maintain said facilities in accordance
with good engineering and operating practices in the State of California.

     11.2 Edison shall use its best efforts to schedule maintenance of the
Interconnection Facilities during the off-peak hours as specified in Edison's
Tariff Schedule TOU-8, and during expected minimal generation periods as agreed
upon by the Operating Representatives. The anticipated duration of any scheduled
or unscheduled outages of said facilities shall be communicated promptly to
Seller in a manner as directed in writing by Seller's Operating Representative.

     11.3 This Section 11 shall be subject to Seller's option regarding
provision of power for the operation of the Generating Facility and Geothermal
Facilities as set forth in Section 6.6 of this Agreement.

12. DELIVERY AND MEASUREMENT OF NET ENERGY:

     12.1 Seller shall make, and Edison shall accept, Net Energy deliveries at
the Point of Interconnection. Such deliveries shall be measured at the Edison 33
kV metering arrangement as shown in Exhibit A. The 33 kV measurement meters
shall be provided, owned and maintained at Edison's expense. Readings from such
meters shall

                                       16

be the basis for determining Edison's Net Energy payments to Seller. For billing
purposes, Edison shall read and record the 33 kV meter measurements on a monthly
basis.

     12.2 Edison's meters shall be sealed, and the seals shall be broken only
when the meters are to be inspected, tested or adjusted by Edison. Seller shall
be given reasonable notice of testing and have the right to have its
representative present on such occasions.

     12.3 Edison shall test, at its expense, the Edison Meters installed
pursuant to this Agreement at least once each year. Edison shall test the meters
at any reasonable time upon the request of Seller at Seller's expense. If Seller
requests such a test, Seller shall reimburse said expense to Edison within
thirty days after presentation of a bill therefor.

     12.4 Metering equipment found to be inaccurate shall be repaired, adjusted
or replaced by Edison so that the metering accuracy of said equipment shall be
within two percent (2%). If metering equipment inaccuracy exceeds two percent
(2%), the correct amount of Net Energy delivered during the period of said
inaccuracy shall be estimated by Edison and agreed upon by the Parties.

13. SALE OF PROJECT:

     13.1 If Seller desires to sell the Project and/or Geothermal Facilities,
Seller shall promptly first offer to Edison, or any Edison subsidiary or
affiliate designated by Edison in its sole judgment, the right to purchase the
Project and/or Geothermal Facilities

                                       17

and to purchase brine pursuant to the Magma Lease. Edison, or any Edison
subsidiary or affiliate designated by Edison in its sole judgment, shall have up
to ninety days from receipt to accept Seller's offer or to negotiate with Seller
to reach mutual agreement.

     13.2 In the event the Parties are unable to reach a satisfactory agreement
pursuant to Section 13.1 and the Project and/or Geothermal Facilities are
offered to any other party or parties, Edison or any Edison subsidiary or
affiliate designated by Edison in its sole judgment, shall have up to thirty
days from receipt of written notice of such terms to purchase the Project under
the same terms and conditions as those under which Seller is willing to sell,
and another party or parties are willing to purchase, the Project and/or
Geothermal Facilities.

     13.3 Seller represents and warrants that it: (i) presently has, and shall
maintain at all times during the term of this Agreement, interests and rights
necessary for the engineering, design, ownership, construction, operation,
maintenance and testing of the Project and the Geothermal Facilities, (ii) shall
not assign any such rights or interests without the prior written consent of
Edison during the term or this Agreement as provided in Section 24, (iii) shall
not permit to be enforced against such rights or interests any liens or
encumbrances, and (iv) shall provide Edison all of those interests and rights,
including, but not limited to the Geothermal Facilities, necessary for the
ownership, operation and maintenance of the Project and Geothermal Facilities
for a term equal to that agreed upon pursuant to Section 13.1 in the event that
Edison purchases the Project and Geothermal Facilities.

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     13.4 If Seller sells or otherwise conveys any interest in the Project
and/or Geothermal Facilities, Seller shall pay immediately to Edison the accrued
MWh Credit balance (converted to kWh) converted to dollars by multiplying said
amount by the then current Avoided Cost for energy and capacity (converted to
(cent)/kWh) together with any other sums then due Edison hereunder.

14. ABANDONMENT:

     14.1 The Project and Geothermal Facilities shall be deemed abandoned if
Seller terminates operation of the Project and Geothermal Facilities with the
intent that such termination is permanent. Such intent shall be conclusively
presumed by either (i) Seller's notice to Edison of such intent or (ii) Seller's
operation or nonoperation of the Project and Geothermal Facilities such that no
Net Energy is generated for two hundred consecutive days during any period after
the Date of Firm Operation, unless otherwise agreed upon in writing by the
Parties.

     14.2 If Seller abandons the Project and Geothermal Facilities during the
term of this Agreement, Edison, or any Edison subsidiary or affiliate designated
by Edison in its sole discretion, shall have the first right to Purchase the
Project and Geothermal Facilities at their fair market value or by assuming the
construction/permanent loan from an institutional lender for the construction of
the Project and Geothermal Facilities ("Project Loan"), existing at the time of
purchase. Until the accrued MWh Credit, as provided for in Section 15.2.2 has
been reduced to zero, the amount of the Project Loan shall not exceed eleven
million dollars ($11,000,000) unless otherwise agreed upon by

                                       19

the Parties. The proceeds of the Project loan shall only be used in connection
with the Project and Geothermal Facilities. Seller shall not extend or otherwise
modify any term of the Project Loan without the prior written consent of Edison.

     14.3 If Edison purchases the Project and Geothermal Facilities pursuant to
Section 14.2, Seller shall, at the time of such purchase, provide Edison with
those interests and rights necessary for the ownership, operation and
maintenance of the Project and Geothermal Facilities, including, but not limited
to those rights provided to Seller under the Magma Lease, necessary to produce
and utilize geothermal energy in sufficient quantities to operate the Project
and Geothermal Facilities at a level necessary to obtain and sustain the
agreed-upon Net Capacity for the remaining term of this Agreement.

     14.4 If Seller abandons the Project, Seller shall immediately repay to
Edison the accrued MWh Credit balance (converted to kWh) converted to dollars by
multiplying said amount by the then current Avoided Cost for energy and capacity
(converted to (cent)/kWh) together with any other sums then due Edison
hereunder.

     14.5 If Seller abandons the Project pursuant to this Section 14, or fails
to maintain this Agreement in effect for the term set forth in Section 5.1.1,
Seller shall reimburse Edison for the Base Capacity Price payments which Seller
did not earn because of early termination. Such reimbursement for Base Capacity
Price payments received by Seller under this Agreement shall be in accordance
with the following formula: R = (1. - x/30) times the total value of Base
Capacity Price payments paid for deliveries from the Project, where "x" equals
the number of completed years of Project

                                       20

Operation. If Edison does not exercise its option pursuant to Section 14.2,
Seller shall make such reimbursement to Edison within thirty (30) days after
presentation of a bill therefor.

15.  AGREEMENT PRICE, MEGAWATTHOUR ("MWH") CREDIT
     ACCUMULATION AND REPAYMENT, AND BASE
     CAPACITY PRICE ADJUSTMENTS:

     15.1 Agreement Price.

          15.1.1 Edison shall pay for any Net Energy delivered by Seller to
Edison at the Point of. Interconnection prior to the Date of Firm Operation.
Such payment shall be Edison's Published Avoided Cost of energy with no payment
for capacity.

          15.1.2 Except as provided in Section 15.1.1 and upon operation
commencing with the Date of Firm Operation ("Project Operation"), Edison shall
pay Seller an Agreement Price for all Net Energy delivered and for all Net
Capacity made available to Edison at the Point of Interconnection as follows:

               15.1.2.1 Commencing on the Date of Firm Operation and continuing
to September 12, 1986, the Agreement Price shall be 12.5(cent)/kWh.

               15.1.2.2 Commencing on September 12, 1986, and continuing through
December 31, 1995, the Agreement Price shall be 8.94(cent)/kWh (the sum of
7(cent)/kWh energy payment plus 1.94(cent)/kWh capacity payment).

               15.1.2.3 Commencing on January 1, 1996, and continuing through
the remaining term of this Agreement, the Agreement Price shall be equal to the
sum of 100% of Edison's Published Avoided Cost of energy plus 1.94(cent)/kWh
capacity payment.

                                       21

          15.1.3 During the period from January 1, 1989, through December 31,
1995, Seller shall deliver to Edison at least 70% of the total Net Energy
delivered to Edison during the period from September 12, 1986, through December
31, 1988. If the total Net Energy deliveries during the period from January 1,
1989, through December 31, 1995, are not at least 70% of the total Net Energy
deliveries during the period from September 12, 1986, through December 31, 1988,
then Seller shall be subject to Section 15.1.4 of this Agreement.

               15.1.4 If Seller fails to meet the performance requirements set
forth in Section 15.1.3, Seller shall, at Edison's request, make an energy
payment refund equal to the greater of zero or the difference in the net present
value, calculated at a discount rate of eight percent per annum, between:

                    A.   The present value of the net energy delivered to and
                         purchased by Edison from September 12, 1986, to
                         December 31, 1995, at the energy price specified
                         herein, less;

                    B.   The present value of the net energy delivered to and
                         purchased by Edison from September 12, 1986, to
                         December 31, 1995, at an energy price appropriate for
                         the year in which any energy payment refund is made,
                         equal to the energy prices shown below:

                                       22

                        Year                         Energy Price
                        ----                         (cents/kWh)
                                                     ------------
                        1986                           6.0
                        1987                           6.4
                        1988                           6.9
                        1989                           7.6
                        1990                           8.1
                        1991                           8.6
                        1992                           9.3
                        1993                           10.1
                        1994                           10.9
                        1995                           11.8

               The energy payment refund, if required, will be based on present
values calculated to the date of the refund or January 1, 1996, whichever occurs
earlier.

          15.1.5 Seller shall reimburse Edison for any energy and capacity
payments made after September 12, 1986, that are in excess of the monthly energy
and capacity payments to be paid to Seller under this Section 15 by means of a
reduction in each monthly energy and capacity payment, commencing upon the
effective date of this Agreement, up to the full amount of each monthly Payment,
until all such excess payments are recovered by Edison.

     15.2 MWh Credit Accumulation

          15.2.1 If payments Pursuant to Section 15.1.2.1 exceed Edison's
avoided cost for energy and capacity, such excess shall be treated as payment
incentives to be repaid by Seller to Edison. The accumulation of the Monthly MWh
Credit shall be calculated in accordance with the following formula:

                                              12.5 (cent)/kWh - 8.94(cent)/kWh
 Monthly MWh Credit = Net energy Delivered  x --------------------------------
                                                     8.94(cent)/kWh

                                       23

Wherein 12.5 cents equals (cent)/kWh paid for total kWh delivered from February
26, 1985, to September 12, 1986, and 8.94(cent)/kWh equals 7(cent)/kWh for
energy plus 1.94c/kWh for capacity. If the Monthly MWh Credit is negative, it
shall not be included in the calculation of the accumulation of Monthly MWh
Credit.

          15.2.2 As of September 12, 1986, the accrued MWh credit shall be fixed
and recalculated from the Date of Firm Operation through September 12, 1986,
which shall be deemed to be to 34,642 MWh.

     15.3 Security for Energy and Capacity Payments

          15.3.1 Coincident with the effective date of this Amended and Restated
Power Purchase and Sales Agreement, Seller shall provide and maintain security
in the amount of $1.3 million in the form of a letter of credit or corporate
guarantee reasonably satisfactory to Edison, which shall insure payment to
Edison of the energy payment refund and/or the accrued MWh credit as set forth
herein. Seller shall provide Edison with certificates evidencing Seller's
compliance with the security requirements in this section.

          15.3.2 If Seller provides security in the form of a letter of credit,
the following criteria must be met:

          A. The letter of' credit must be issued by a financial institution
which La registered with the California banking commissioner and doing business
in California.

          B. The bank issuing, the letter of credit must have assets in excess
of $250 million and maintain a rating of "BC" or better from Keefe, Bryette &
Woods.

                                       24

          C. The issuing institution shall provide Edison with annual
certification that it meets these criteria.

          15.3.3 If Seller provides security in the form of a corporate
guarantee as set forth in Exhibit G attached hereto and made part hereof by this
reference, the following criteria must be met:

          A. The corporate guarantee shall be supported by an audited financial
statement and a Dun and Bradstreet credit report, acceptable to Edison in its
sole judgment, for each year in which the security is required.

          B. If a corporate guarantee is provided and accepted, Seller shall
cause the party issuing such corporate guarantee to provide annual audited
financial statements and Dun and Bradstreet reports for the period of time that
the security is required. In addition to the foregoing, Edison shall have the
right to utilize any other relevant information it may possess or obtain in
order to evaluate the acceptability of the security.

          C. If the Dun and Bradstreet credit rating, the annual audited
financial statement or other relevant information change materially according to
accepted business practices during the period the security is in effect, Edison
shall have the right to require replacement security.

          15.3.4 The security contemplated herein shall remain in full force and
effect until the obligations of Seller as sat forth in Sections 15.1 and 15.2
have been satisfied, at which time the requirement for security shall terminate.

                                       25

          15.3.5 The security contemplated herein may be reduced at Seller's
option in accordance with the following criteria:

          A. Security for the energy payment refund may be reduced by the amount
of energy payment refund paid to Edison under the terms of this Agreement.

          B. Security C or the accrued MWh credit may be reduced by $37.53 for
each MWh repaid to Edison from the accrued MWh bank.

          15.3.6 Notwithstanding the foregoing Sections 15.3.1 through 15.3.4,
the security provisions set forth in Section 22 or this Agreement shall remain
in full force and effect.

     15.4 MWh Credit Repayment

          15.4.1 Seller, at its option, may prepay any MWh amount of the accrued
MWh credit at any time. Notwithstanding the foregoing, commencing on January 1,
1996, and through the end of the term of the Agreement, all accrued MWh credit
shall be repaid to Edison in the form of equal monthly deliveries to Edison of
the remaining accrued MWh credit being repaid, prorated over the remaining term
of this Agreement. If there is no prepayment of accrued MWh, then the accrued
MWh credit of 34,642 MWh shall be repaid from 1996 to 2015 at the rate of 1732.1
MWh each year to Edison with no cash Payment for such energy. The accrued MWh
Credit of 34,642 MWh shall be reduced by the amount of MWh credits repaid prior
to January 1, 1996.

          15.4.2 In the event that any accrued MWh credit residue exists as of
December 31, 2015, such residue shall be paid in full pursuant to the Guaranty

                                       26

Agreement, attached hereto as Exhibit G and made part hereof by this reference,
but shall in no event be paid by further deliveries of power to Edison. The
value of one (1) MWh of accrued MWh credit shall be deemed to be $37.53.

     15.5 Monthly Capacity Payment

     The monthly capacity payment shall be calculated as follows:

     Monthly Capacity Payment = 1.94(cent)/kWh

                                x  (Effective Net Capacity, kW)

                                x  (Total hours in month, Hour)

                                x  (Monthly Capacity Factor)

                                x  (Hurdle Factor)

                                x  (Availability Factor)

          15.5.1 Hurdle Factor

              The Hurdle Factor shall be either 1.0 if the Monthly Capacity
Factor is equal to or greater than 51% or 0.5 if the Monthly Capacity Factor is
less than 51%.

          15.5.2 Availability Factor The Availability Factor shall equal 1.0
unless Seller fails to provide Net Capacity pursuant to Section 15.5.2.1 in
which case the Availability Factor shall be 0.5.

               15.5.2.1 At Edison's request., Seller shall, within 30 minutes of
such request, make all reasonable effort to make available the Net Capacity
according to the Table set forth in Exhibit F, attached hereto and made part
hereof by this reference, during periods of Emergency. If Seller has previously
scheduled an outage coincident with an

                                       27

Emergency, Seller shall make all, reasonable efforts to reschedule the outage.
Failure of Seller to provide Net Capacity during an Emergency when first
requested by Edison following the Date of Firm Operation shall not result in a
reduction of Monthly Capacity Payments. However, after said initial request by
Edison, whether or not Seller has complied with such request, any subsequent
failure by Seller to comply with a request for Net Capacity by Edison shall
result in the Availability Factor becoming 0.5 for the month in which the
request occurred. The Availability Factor shall continue to be 0.5 until Seller
can demonstrate that the Project can comply with a request for Net Capacity by
Edison.

16. TAXES:

     16.1 Ad valorem taxes and other taxes properly attributed to the Project
and Geothermal Facilities shall be paid by Seller. If such taxes are assessed or
levied against Edison, Seller shall pay Edison the amount of such assessment or
levy within thirty days of presentation of a bill therefor.

     16.2 Ad valorem taxes and other taxes properly attributed to land, land
rights or interests in land for the Interconnection Facilities shall be paid by
Edison. If such taxes are levied against Seller, Edison shall pay Seller the
amount of such assessment or levy within thirty days of presentation of a bill
therefor.

17. BILLING AND PAYMENT

     17.1 Billing for Net Energy shall be determined for each calendar month by
application of the Agreement Price pursuant to Section 15, to monthly meter
readings

                                       28

taken on, or about, the last day of each month. Within fifteen days after such
readings, Edison shall mail a monthly statement of Net Energy and the dollar
amount, if any, to be paid by Edison to Seller for Net Energy for that month.
Payment to Seller shall follow within fifteen days of the statement.

     17.2 Seller shall pay Edison for energy delivered and capacity made
available to the Project within thirty days of the mailing of the monthly
billing statement from Edison. Seller-shall ply for such energy and capacity in
accordance with the provisions of Section 6.2.

     17.3 Edison shall bill Seller for taxes pursuant to Section 16.1, excluding
any penalties or interest, no later than three (3) months following the date of
payment of such taxes by Edison, as Seller shall pay to Edison therefor within
forty-five days of the mailing date of the bill to Seller.

     17.4 Seller shall bill Edison for taxes pursuant to Section 16.2, excluding
any penalties or interest, no later than three (3) months following the date of
payment of such taxes by Seller, and Edison shall pay Seller therefor within
forty-five days of the mailing date of the bill to Edison.

     17.5 If any amount of money owed hereunder by either Party has not been
paid when due, an interest charge computed at the rate of the then-current Bank
of America prime rate plus 1% per annum, compounded daily, or the maximum legal
rate, whichever is less, from the due date until paid shall be added thereto.

                                       29

18. OPERATING REPRESENTATIVES:

     18.1 Within thirty days after execution of this Agreement, each Party shall
appoint an Operating Representative for the purpose of securing effective
cooperation and interchange of information and providing consultation and
coordination on a prompt and orderly basis between the Parties in connection
with various administrative, technical and operating matters which may arise
from time to time under this Agreement, including the performance of the
functions and duties of said representative under this Agreement.

     18.2 Each Party shall bear the cost of its designated Representative.

     18.3 Each Party shall notify the other Party promptly of any change in the
designation of its Operating Representative.

     18.4 The Operating Representative shall have no authority to modify any of
the terms, covenants or conditions of this Agreement.

19. LIABILITY:

     19.1 Each Party (First Party) hereby releases the other Party (Second
Party), its directors, officers, employees, and agents from any liability for
any loss, damage, claim, cost, charge or expense (including direct, indirect or
consequential loss, damage, claim, cost, charge or expense, including attorney's
fees and other costs of litigation) incurred by the First Party in connection
with damage to the property of the First Party arising out of the Second Party's
construction, engineering, repair, supervision, inspection, testing, protection,
operation, maintenance, replacement, reconstruction, use or ownership of its
facilities, to the extent such loss, damage, claim, cost, charge or expense is
caused by the negligence of the Second Party, its directors, officers,

                                       30

employees, agents or any person or entity whose negligence would be imputed to
the Second Party.

     19.2 Each Party shall indemnify and hold harmless the other Party, its
directors, officers, employees and agents from and against any loss, damage,
claim, cost, charge or expense (including direct, indirect or consequential
loss, damage, claim, cost, charge or expense, including attorney's fees and
other costs of litigation) incurred by the other Party in connection with injury
to, or death of, any person or damage to property of third parties arising cut
of arising out of the indemnifying Party's construction, engineering, repair,
supervision, inspection, testing, protection, operation, maintenance,
replacement, reconstruction, use or ownership or its facilities, to the extent
that such loss, damage, claim, cost, charge or expense is caused by the
negligence of the indemnifying Party, its directors, officers, employees, agents
or any person or entity whose negligence would be imputed to the indemnifying
Party; provided, however, that each Party shall be solely responsible for, and
shall bear all costs of, claims brought by its contractors or its own employees
and shall indemnify and hold harmless the other Party for any such costs
including costs arising out of any worker's compensation law.

     19.3 The provisions of this Section 19 shall not be construed so as to
relieve any insurer of its obligations to pay any insurance claims in accordance
with the provisions of any valid insurance policy.

                                       31

20. INSURANCE:

     20.1 Seller shall procure and maintain, and shall require each of its
contractors and subcontractors to maintain, the following insurance during the
term of this Agreement.

          20.1.1 Workers' Compensation and Employer's Liability Insurance in
compliance with statutory requirements of the State of California. Named
insureds shall require their insurers to waive all rights of subrogation against
Edison.

          20.1.2 Comprehensive Bodily Injury and Property Damage Liability
Insurance, including owner's and contractor's protective, products/completed
operations, blanket contractual and automobile liability coverages, with
combined single limits of not less than $5,000,000 per occurrence. Such
insurance shall (i) acknowledge Edison as an additional insured but only for
Seller's or Seller's contractor's acts or omissions, (ii) be primary for all
purposes and (iii) contain standard cross-liability provisions.

          20.1.3 Seller will use its best efforts to secure business
interruption insurance in the amount of $1,500,000 per year for the period
commencing with the second year of Project Operation.

     20.2 Prior to the commencement of work on the Project and during the term
of this Agreement, Seller shall furnish a certificate of insurance to Edison
evidencing the above coverage. Such certificate shall provide that such
insurance shall not be terminated nor expire except on thirty days' prior
written notice to Edison. Payments of premiums and deductible losses for the
above insurance shall be at Seller's sole expense.

                                       32

     20.3 If Seller fails to comply with any of the provisions of this Section
20, Seller shall, at its own cost, defend, indemnify, and hold harmless Edison,
its directors, officers, agents, employees, assigns and successors in interest
from and against any and all liability, damages, losses, claims, demands,
actions, causes of action, costs, including attorney's fees and expenses, and
other costs and expenses of litigation, or any of them, resulting from death of,
or injury to, any person or damage to, or loss of, any property, including
personnel and property of Edison, to the extent Edison would have been protected
had Seller complied with all of the provisions of this Section 20.

21. WAIVERS:

     21.1 Any waiver at any time by either Party of its rights with respect to a
default or any other matter arising in connection with this Agreement shall be
in writing and shall not be deemed to be a waiver with respect to any subsequent
default or matter.

22. SECURITY:

     22.1 As security for any amounts payable by Seller to Edison pursuant to
Section 15, Seller hereby grants Edison, a continuing lien and security interest
in the Project and Geothermal Facilities subject and subordinate only to the
lien and security Interest of the lender providing construction of permanent
financing for the Project contained in the Construction and Term Loan Agreement
between Mammoth-Pacific and Pacific Lighting Leasing Company, dated September 7,
1983. The lien and security interest of Edison shall be evidenced by a Deed of
Trust, Assignment of Rents, and

                                       33

Security Agreement, and Financing Statement in the form attached hereto as
Exhibit B and Exhibit C respectively, and by this reference made a part hereof.

     22.2 As additional security for any amounts payable by Seller to Edison
pursuant to Section 15, Seller hereby agrees that its leasehold interest
covering the Project and Seller's right to produce geothermal fluid shall be
subject to a lien in favor of Edison until the Total MWh Credit is repaid. Such
lien shall be evidenced by a Deed of Trust, Assignment of Rents, and Security
Agreement in the form attached hereto as Exhibit B and by this reference made a
part hereof.

23. UNCONTROLLABLE FORCES:

     23.1 Neither Party shall be considered to be in default in the performance
of any of its obligations under this Agreement, other than the obligation to pay
money for energy and capacity previously delivered and received, when, and to
the extent, failure of performance shall be due to an uncontrollable force. The
term "uncontrollable force" means any cause beyond the control of the party
failing to perform including, but not limited to, failure of facilities
maintained in accordance with good engineering and operating practices in
California, flood, earthquake, storm, lightning, fire, epidemic, war, riot,
civil disturbance or disobedience, labor dispute, labor or material shortage,
sabotage, restraint by court order or public authority, art action or nonaction
by, or inability to obtain the necessary authorizations or approvals from, any
governmental agency or authority, which by the exercise of due diligence such
Party could not reasonably have been expected to avoid and which by exercise of
due diligence it has not overcome.

                                       34

Either Party rendered unable to fulfill any of its obligations under this
Agreement by reason of an uncontrollable force shall give prompt written notice
of such facts to the other Party and shall exercise due diligence to remove such
inability. Nothing contained herein shall be construed so as to require a Party
to settle any strike or labor dispute in which it may be involved.

24. ASSIGNMENT OF RIGHTS

     24.1 Neither Party shall assign any interest in the Agreement, the Project
or in the Geothermal Facilities, other than to a subsidiary or affiliate or in
connection with the merger or sale of substantially all of its assets, without
the express written consent of the other Party. Any assignment without the
consent of the other Party, which consent shall not be unreasonably withheld,
shall be void.

     24.2 Seller may not sell, transfer, assign, convey or further encumber any
interest in the Agreement or in the Project or in the Geothermal Facilities or
leasehold interest or any interest in the Magma Lease unless it promptly repays
Edison the accrued MWh Credit balance (converted to kWh) converted to dollars by
multiplying said amount by the then current Avoided Cost for energy and capacity
(converted to (cent)/kWh) together with any other sums then due Edison.

     24.3 Any assignment by a Party of its interest in this Agreement shall not
relieve the assigned Party of primary liability for any of its duties and
obligations under this Agreement, and in the event of such assignment, the
assigning Party shall continue to remain primarily liable for payment of any and
all money due the other Party as provided

                                       35

under this Agreement, and for the performance and observance of all other
covenants, duties and obligations to be performed and observed under this
Agreement by the Party to the same extent as though an assignment had not been
made.

25. DISPUTES:

     25.1 Any dispute arising between the Parties or their Operating
Representatives relating to interpretation of the provisions of this Agreement
or to the performance of the Parties hereunder, on which the Operating
Representatives cannot reach final agreement within thirty days of written
notice from the disputing Party to the other Party of such a dispute, shall be
referred to the signatories to this Agreement, or any successors thereto, for
resolution.

     25.2 The final decision by the signatories to this Agreement, or any
successors thereto, shall be made within thirty days after presentation by the
Operating Representatives of all evidence affecting the dispute, and shall be
reduced to writing. The decision shall be final and conclusive; provided, that
if said signatories or successors cannot reach a final agreement regarding the
dispute within the thirty day period, any remedies which are provided by law may
be pursued.

26. LIENS AND ENCUMBRANCES:

     26.1 Seller shall not suffer or permit to be enforced against the Project
or Project land, land rights, or interests in land, or in the Geothermal
Facilities or in the Magma Lease or any part thereof, any mechanic's,
materialman's, contractor's or subcontractor's liens arising from, or any claim
for damage growing out of, the work of

                                       36

any construction, repair, restoration, replacement, or improvement, or any other
claim or demand howsoever the same may arise; provided, if the aforesaid should
occur, Seller shall take any and all action necessary to cause any such lien to
be released or discharged or the enforcement thereof against the Project or
Project land, land rights or interests in land or the Geothermal Facilities or
in the Magma Lease to be terminated; and Seller agrees to indemnify and hold
Edison and said premises free and harmless from all liability for any and all
such liens, claims and demands, together with reasonable attorney's fees and all
costs and expenses in connection therewith.

27. DISCLAIMER:

     27.1 Any review by Edison of the design, construction, operation or
maintenance of the Project is solely for the information of Edison. By making
such review, Edison makes no representation as to, and in no way shall be
responsible for, the economic feasibility, technical feasibility, operational
capability or reliability, technical feasibility, operational capability or
reliability of the Project. Seller shall in no way represent to any third party
that any such review or the Project by Edison, including but not limited to, any
review of the design, construction, operation or maintenance of the Project by
Edison is a representation by Edison as to the economic feasibility, technical
feasibility, operational capability or reliability of said facilities. Seller is
solely responsible for economic feasibility, technical feasibility, operational
capability or reliability thereof. Edison shall not be liable to Seller or third
parties for, and Seller shall defend and indemnify Edison from, any cost, loss,
damage or liability arising from any

                                       37

contrary representation regarding the design, construction, operation or
maintenance of the Project.

28. CONFIDENTIAL AND PROPRIETARY INFORMATION

     28.1 The Parties agree that the terms and conditions set forth in this
Agreement are to be maintained in confidence, and neither Party shall disclose
any such information to any third party without the prior consent of the other.

     28.2 Edison shall maintain in confidence, and shall use only for the
purposes of this Agreement, information it may receive from Seller concerning
the production and treatment of geothermal energy; the extent, productivity and
properties of the Magma Resource; the compositions and properties of the
geothermal substances produced from said Magma Resource; and other geothermal
operations conducted by Seller in the Magma Resource.

     28.3 The obligations of confidentiality set forth in Section 28.2 shall not
apply to (i) information already known to the receiving Party when received from
the other Party; (ii) information which is known or becomes known to the general
public through acts of others than the Party hereto charged with the obligation
to maintain it in confidence; and (iii) information received from a third party
without restriction who did not acquire it directly or indirectly from the other
Party.

     28.4 Any Party required by any law, rule, regulation or order to disclose
information which is otherwise required to be maintained in confidence pursuant
to this Section 28 or where such disclosure is required in connection with the
assertion of any

                                       38

claim or defense in judicial or administrative proceedings involving a Party,
may make such disclosure, notwithstanding the provisions of this Section 28;
provided, however, that the Party otherwise required to make such disclosure
shall inform the other Party thereof and shall cooperate to the maximum extent
practicable to minimize the disclosure of any such information. The Party so
disclosing such information shall use its best efforts to obtain proprietary or
confidential treatment of such information by the third party to whom such
information is so disclosed, and will, to the extent such remedies are
available, seek protective orders limiting the dissemination and use of such
information. This Agreement does not alter the rights of either Party to object
to any such disclosure to any third party, to the extent such rights are
permitted by law, rule, regulation or order.

29. NO THIRD PARTY BENEFICIARIES:

     29.1 This Agreement is for the sole benefit of the Parties and shall not be
construed as granting rights to any person or entity other than the Parties or
imposing obligations on either Party to any person or entity other than the
Parties.

30. NONDEDICATION OF FACILITIES:

     30.1 Nothing in this Agreement, and no undertaking under this Agreement
shall be construed as constituting, a dedication by either Party or any of its
properties or facilities, or any part thereof, to the other Party or to the
customers of a Party, or to the public.

                                       39

31. NOTICES:

     31.1 Except as otherwise specifically provided herein, any demand, notice,
or request from one Party to the other, shall be given in writing and shall be
deemed properly given, if delivered in person or sent by registered or certified
mail to the persons specified below:

              Southern California Edison Company
              2244 Walnut Grove Avenue
              Post Office Box 800
              Rosemead, CA 91770
              Attention:  Secretary

              Mammoth-Pacific
              c/o Pacific Geothermal Company
              6055 E. Washington Blvd.
              Commerce, CA 90040
              Attention:  President

32. GOVERNING LAW

     32.1 This Agreement shall be interpreted, governed by, and construed under
the laws of the State of California or the laws of the United States, as
applicable, as if executed and to be performed wholly within the State of
California.

33. GENERAL PROVISION:

     33.1 This Agreement constitutes the entire agreement and understanding
between the Parties as to the subject matter of this Agreement. Prior
agreements, commitments or representations express or implied, and discussions
between the Parties shall not be construed to be a part of this Agreement unless
contained in this Agreement.

                                       40

                                      SOUTHERN CALIFORNIA EDISON COMPANY

                                      By /s/ Glenn J. Bjorklund
                                         ---------------------------------------
                                         Glenn J. Bjorklund
                                         Vice President

                                      MAMMOTH-PACIFIC
                                      A California General Partnership

                                      By /s/ Daniel A. Seigel
                                         ---------------------------------------
                                         Daniel A. Seigel
                                         President of Pacific Geotherman Company

                                       41Exhibit 10.3.12

                             AMENDMENT NO. 1 TO THE
                              AMENDED AND RESTATED
                       POWER PURCHASE AND SALES AGREEMENT
                                     BETWEEN
                                 MAMMOTH PACIFIC
                                       AND
                       SOUTHERN CALIFORNIA EDISON COMPANY

              1.  PARTIES

              The Parties to this Amendment No. 1 to the Amended and Restated
Power Purchase and Sales Agreement between Mammoth Pacific and Southern
California Edison Company, executed on December 2, 1986 ("Contract") are Mammoth
Pacific, L.P., a California limited partnership ("Seller") and Southern
California Edison Company ("Edison") referred to individually as "Party" and
collectively as "Parties."

              2.  RECITALS

              This Amendment No. 1 is made with reference to the following
facts, among others:

              2.1 On December 2, 1986, Mammoth-Pacific and Edison executed the
Contract which supersedes and replaces, in all terms and conditions, the
original Mammoth Binary Power Purchase and Sales Agreement executed on October
20, 1983, assigned to Mammoth Pacific on October 20, 1983, and Amendment No. 1
thereto, executed on December 30, 1983.

              2.2 On January 29, 1990, Mammoth Pacific assigned its right,
title, and interest in the Contract to Seller. Edison consented to this
assignment on January 26, 1990. As a condition of this assignment, Mammoth
Pacific repaid to Edison the dollar equivalent of the accrued MWh Credit
balance, pursuant to the terms and conditions of the Contract, on January 30,
1990.

              2.3 The Parties desire to amend the Contract to delete references
to the MWh Credit balance since this obligation has been discharged.

              3.  AGREEMENT

              The Parties agree to amend the Contract as follows:

              3.1  Section 1.1 is amended to read as follows:

              "1.1 The Parties to this Amended and Restated Power Purchase and
Sales Agreement are: Mammoth Pacific, L.P. ("Seller"), a California limited
partnership, and Southern California Edison Company ("Edison"), a California
corporation, individually "Party", and collectively, "Parties.""

              3.2 Section 2.2 is amended to read as follows:

              "2.2 This Amended and Restated Power Purchase and Sales Agreement
provides for the following revisions, among others; restructuring of payment
provisions for energy and capacity purchased by Edison, providing additional
financial security to Edison and outlining Seller's option to supply power from
the Generating Facility for operation of the Geothermal Facility and the
Generating Facility;"

              3.3  Section 13.4 is amended to read as follows:

              "13.4 If Seller sells or otherwise conveys any interest in the
project and/or Geothermal Facilities, Seller shall pay immediately to Edison any
monies then due Edison hereunder."

              3.4  Section 14.2 is amended to read as follows:

              "14.2 If Seller abandons the Project and Geothermal Facilities
during the term of this Agreement, Edison, or any Edison subsidiary or affiliate
designated by Edison in its sole discretion, shall have the first right to
purchase the Project and Geothermal Facilities at their fair market value."

              3.5  Section 14.4 is amended to read as follows:

              "14.4 If Seller abandons the Project, Seller shall immediately
repay to Edison any monies then due Edison hereunder."

              3.6  Section 15 is amended to read as follows:

              "15.  AGREEMENT PRICE AND BASE CAPACITY PRICE ADJUSTMENTS:"

              3.7  Section 15.2 is amended to read as follows:

              "15.2  MWh Credit Accumulation

              As of September 12, 1986, the accrued MWh Credit shall be fixed
and recalculated from the Date of Firm Operation through September 12, 1986,
which shall be deemed to be 34,642 MWh. In conjunction with the assignment of
the Contract on

                                       2

January 29, 1990, the accrued MWh Credit balance shall be converted to dollars
which shall be deemed to be $1,157,894.99 and shall be repaid to Edison on
January 30, l990, thus discharging all obligation of the Seller with regard to
the accrued MWh Credit."

              3.8  Section 15.3.1 is amended to read as follows:

              "15.3.1 Coincident with the effective date of this Amended and
Restated Power Purchase and Sales Agreement, Seller shall provide and maintain
security in the amount of $1.3 million in the form of a letter of credit or
corporate guarantee from Pacific Energy, reasonably satisfactory to Edison,
which shall insure payment to Edison of the energy payment refund and/or other
monies as set forth herein. Seller shall provide Edison with certificates
evidencing Seller's compliance with the security requirements in this section."

              3.9  Section 15.3.5 is amended to read as follows:

              "15.3.5 The security contemplated herein may be reduced at
Seller's option in accordance with the following criteria:

              A. Security for the energy payment refund may be reduced by the
amount of energy payment refund paid to Edison under the terms of this
Agreement."

              3.10  Section 15.4 is amended to read as follows:

              "15.4  MWh Credit Repayment

              The accrued MWh Credit shall be deemed to be repaid to Edison
effective as of January 30, 1990."

              3.11  Section 22 is amended to read as follows:

              "22.  Security:

              22.1 Pursuant to the repayment of the accrued MWh Credit, as set
forth herein, Edison's lien and security interest in the Project and Geothermal
Facilities shall be reconveyed to Seller effective as of January 30, 1990.

              22.2 Pursuant to the repayment of the accrued MWh Credit, as set
forth herein, Edison's lien evidenced by a Deed of Trust, Assignment of Rents,
and Security Agreement shall be reconveyed to Seller effective as of January 30,
1990."

              3.12  Section 24.2 is amended to read as follows:

                                       3

              "24.2 Seller may not sell, transfer, assign, convey, or further
encumber any interest in the Agreement or in the Project or in the Geothermal
Facilities or leasehold interest or any interest in the Magma Lease unless it
promptly repays Edison any monies then due Edison."

              3.13  Section 31.1 is amended to read as follows:

              "31.1 Except as otherwise specifically provided herein, any
demand, notice, or request from one Party to the other, shall be given in
writing and shall be deemed properly given, if delivered in person or sent by
registered or certified mail to the persons specified below:

              Southern California Edison Company
              2244 Walnut Grove Avenue
              Post Office Box 800
              Rosemead, CA  91770
              Attention:  Secretary

              Mammoth Pacific, L.P.
              6055 E. Washington Blvd.
              Commerce, CA  90040
              Attention:  President, Pacific Geothermal Company."

              3.14 Exhibit B; "Deed of trust, Assignment of Rents and Security
Agreement" is deleted in its entirety.

              3.15  Exhibit C; "Financing Statement" is deleted in its entirety.

              3.16 Exhibit G; "Guaranty Agreement" is deleted and replaced with
the attached "Guaranty Agreement" dated January 23, 1990.

              4.  OTHER CONTRACT TERMS AND CONDITIONS

              Except as amended herein, all terms, covenants, and conditions
contained in the Contract shall train in full force and effect.

                                       4

              5.  SIGNATURE CLAUSE

              The signatories hereto represent that they have been appropriately
authorized to enter into this Amendment No. 1 on behalf of the Party for whom
they sign. This Amendment No. 1 is hereby executed as of this 18th day of May,
1990.

                                            SOUTHERN CALIFORNIA EDISON COMPANY

                                            By /s/ Robert Dietch
                                               ---------------------------------
                                               Robert Dietch
                                               Vice President

                                            MAMMOTH PACIFIC, L. P.

                                            By /s/ Claude Harvey
                                               ---------------------------------
                                            Name  Claude Harvey
                                            Title Sr. Vice President

                                       5

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