Document:

AMENDMENT AGREEMENT

         THIS AMENDMENT AGREEMENT is made and is effective as of the 3rd day of
March, 2001 between the AGC Division of ALCOA POWER GENERATING INC., a Tennessee
Corporation (hereinafter called "APG") and SOUTHERN INDIANA GAS AND ELECTRIC
COMPANY, an Indiana corporation (hereinafter called "Southern Indiana").

                                   WITNESSETH

         WHEREAS, Alcoa Generating Corporation, now a division of APG, and
Southern Indiana are parties to an Operating Agreement executed April 14, 1958
(hereinafter called the "Operating Agreement") under which Southern Indiana
operates Units 1 through 3 of the APG's Warrick Power Plant located in Warrick
County, Indiana (hereinafter call the "Power Plant"), and an Agreement For Unit
Four at Alcoa Generating Corporation's Warrick Power Plant dated January 30,
1968, (hereinafter called the "Unit Four Agreement"), under which Southern
Indiana operates Unit Four of the Power Plant; and

         WHEREAS, effective March 3, 2001, APG will become responsible for
operating Units 1 through 4 of the Power Plant.

         NOW THEREFORE, in consideration of the foregoing and of the agreements
of the parties as stated herein, APG and Southern Indiana hereby agree as
follows:

                                   ARTICLE ONE

                               OPERATING AGREEMENT

         Section 1. The Operating Agreement shall terminate as of the date of
this Amendment Agreement.

                                   ARTICLE TWO

                               UNIT FOUR AGREEMENT

         Section 1. Except as expressly amended by this Amendment Agreement, the
terms and conditions of the Unit Four Agreement shall remain in effect, and
words defined therein shall have the same meanings herein.

         Section 2. Section 5 of the ARTICLE ONE is amended to provide:

         "Operating Term" means the period commencing at the date of commercial
operation of Unit Four and continuing for forty (40) years thereafter or until
Unit Four shall no longer be used or useful and shall have been retired by both
owners in their books of account, whichever shall be the earlier. This Agreement
shall continue in effect thereafter if Unit Four remains used or useful and has
not been so retired on the books of account of the owners until terminated by
either party by written notice given to the other party. Notice to terminate the
Operating Term at the end of forty years or any time thereafter shall be given
at least thirty months in advance of the intended date of termination.
Notwithstanding the foregoing, the Operating Term may be terminated by either
party, by notice to the other, if the other party shall fail to perform its
obligations hereunder, and such failure shall continue for a period of sixty
days after notice thereof from the party not in default.

Section 3. Section 13 of ARTICLE FIVE is hereby replaced with the following:

               In the event that Southern Indiana terminates the Operating Term
        pursuant to Section 5 of ARTICLE ONE for APG's failure to perform its
        obligations, then APG shall be obligated at Southern Indiana's request
        to purchase Southern Indiana's interests in the Unit Four Real Estate,
        Unit Four and all structures, facilities and equipment constructed or
        installed in or on such real estate or interests and owned by APG and
        Southern Indiana as tenants in common at the price paid by Southern
        Indiana for its interest in the Unit Four Real Estate and at the fair
        market value of its interests in Unit Four, and all structures,
        facilities and equipment constructed or installed in or on such real
        estate or interests and owned by APG and Southern Indiana as tenants in
        common. Such purchase and sale shall not be consummated or become
        effective until Southern Indiana has obtained suitable substitute
        generation facilities to supply it with power or energy equivalent to
        its share of power or energy from Unit Four but in no event shall the
        consummation of such sale be delayed more than five (5) years after the
        date of the termination by Southern Indiana of the Operating Agreement
        pursuant to Section 5 of ARTICLE ONE for APG's failure to perform its
        obligations. Upon the consummation of such sale the parties recognize
        that Southern Indiana will have no further obligation to pay the Common
        Facilities service charge set forth in ARTICLE FOUR hereof.

Section 4. ARTICLE SIX of the Unit Four Agreement is hereby amended to provide
as follows.

                                   ARTICLE SIX

                                  DUTIES OF APG
         Section 1. Functions of APG. APG will operate Unit Four on behalf of
both parties beginning March 3, 2001 and for the remainder of the Operating
Term. APG's functions in regard to operating Unit Four shall include, but not be
limited to:

               (a)  Selection, employment and training of proper and competent
                    staff and working force, all such employees to be employees
                    of APG;

               (b)  purchasing;

               (c)  engineering;

               (d)  maintenance and repairs, including any minor additions to or
                    retirements or replacements of property;

               (e)  accounting;

               (f)  plant security.

         APG will perform its functions in the most efficient and economical
manner practicable. All functions performed by APG in the operation of Unit Four
shall be subject to the direction and control of the Operating Committee and to
the approval of both parties.

         Section 2. Capital Additions to Unit Four. APG shall have the right,
upon the prior written approval of both parties, to make capital improvements,
additions, retirements or replacements in Unit Four for the account of and at
the expense of Southern Indiana and APG.

         Section 3. Contractual Commitments for Operation and Maintenance of
Unit Four. APG may enter contractual commitments under this ARTICLE SIX relating
to the operation and maintenance of Unit Four without Southern Indiana's prior
written consent, but after the approval of the Operating Committee, if such
commitments are incidental to the ordinary operation of Unit Four and Southern
Indiana's share of such commitments determined pursuant to ARTICLE FIVE is less
than $10,000. Nothing contained in this Section 3 or in Section 4 below shall
require APG to secure Southern Indiana's approval, either written or oral, of
APG's employee contracts.

         Section 4. Operation and Maintenance of Common Facilities. In operating
Unit Four APG will also operate and maintain the Common Facilities. The parties
recognize that APG has the sole right to make all decisions regarding the Common
Facilities, as provided in Section 2 of ARTICLE FOUR, above.

          Section 5. Payment and Reimbursement of Operating and Maintenance
Expenses.

         (a) Each party shall pay directly to the proper authorities all ad
valorem property taxes duly assessed against its ownership interest in Unit Four
and the Unit Four Real Estate.

         (b) APG shall pay all other costs, excluding Southern Indiana's coal
costs, of operating and maintaining Unit Four and the Common Facilities.
Southern Indiana shall reimburse APG for Southern Indiana's portion of the
operating and/or maintenance costs of Unit Four and of the Common Facilities
determined as set forth above in ARTICLE FIVE. APG shall bill Southern Indiana
monthly for the amounts reimbursable and Southern Indiana shall pay each monthly
bill within fifteen (15) days after receipt.

         (c) Southern Indiana shall advance to APG from time to time funds to
cover Southern Indiana's share of anticipated expenses of operating and
maintaining Unit Four which will be incurred by APG.

         Section 6. Operating Fee. Each month, Southern Indiana shall pay to APG
an operating fee equal to five percent of Southern Indiana's share of the
operating and maintenance expenses, excluding Southern Indiana's coal costs, of
Unit Four and the Common Facilities attributable to Southern Indiana's half of
Unit Four incurred in the prior month during which APG operated Unit Four. For
purposes of this Section 6, Southern Indiana's share of the foregoing operating
and

<PAGE>

maintenance expenses shall include the expenses of potable water, electric power
and energy, and similar items furnished to Unit four and the Common Facilities
by APG.

         It is the intention of the parties generally that to the extent
possible APG will bear its portion of the expenses of operating and maintaining
Unit Four and the Common Facilities by not receiving reimbursement for its share
of all such expenses which it pays.

         Section 7. Indemnity. APG shall indemnify Southern Indiana against and
hold it harmless from all liability and claims & for damages to property or
injury to persons arising out of the ownership and operation of Unit Four and of
the Common Facilities which result from the negligence of APG, and APG shall at
its own expense defend any action based thereon, provided, however, that where
in the final disposition of any such action it is held that APG is not
negligent, then Southern Indiana shall reimburse APG for its share of the
expenses in defending such action.

         Southern Indiana shall indemnify APG against and hold it harmless from
all liability and claims for damages to property or injury to persons arising
out of the ownership by Southern Indiana its interest in Unit Four which result
from the negligence of Southern Indiana, and Southern Indiana shall at its own
expense defend any action based thereon, provided, however, that where in the
final disposition of any such action it is held that Southern Indiana is not
negligent, then APG shall reimburse Southern Indiana for its share of the
expenses in defending such action.

         Section 8. Access to Unit Four and Common Facilities. Authorized
representatives of APG and Southern Indiana shall have access to Unit Four and
the Common Facilities at any time.

         Section 9. Books and Records and Reports. APG shall keep accurate and
satisfactory books and records of accounts showing all expenses and payments and
all other pertinent data regarding the operation of Unit Four, such books and
records to be kept in accordance with sound and accepted accounting principles.
Accounting records kept in connection with the generation of electric power and
energy shall be kept in accordance with Uniform System of Accounts for Public
Utilities as issued and amended by the Federal Energy Regulatory Commission. All
books and records kept pursuant to this Section shall be available for
inspection by authorized representatives of Southern Indiana at all times. APG
shall submit to Southern Indiana such reports of the operation and maintenance
of Unit Four as Southern Indiana may reasonable request.

<PAGE>

         The parties have executed this Agreement in duplicate as of the day and
year above first written.

ATTEST:                                         ALCOA POWER GENERATING INC.,

                                                By:    /s/  J. T. Hill
--------------------------                    -------------------------------
         Secretary                                     J. T. Hill
                                                           Vice President

[CORP.
SEAL]

ATTEST:                                         SOUTHERN INDIANA GAS
                                                   AND ELECTRIC COMPANY

  /s/  Ronald E. Christian                       By:    /s/ J. Gordon Hurst
---------------------------------                ------------------------------
         Ronald E. Christian                             J. Gordon Hurst
           Secretary                                        President

[CORP.
SEAL]GAS SALES AND PORTFOLIO ADMINISTRATION AGREEMENT

              THIS GAS SALES AND PORTFOLIO ADMINISTRATION AGREEMENT
("Agreement") is entered into and effective the 31st day of October, 2000, for
services to begin November 1st, 2000, by and between VECTREN ENERGY DELIVERY OF
OHIO ("Buyer") and PROLIANCE ENERGY, LLC ("Seller") (collectively, the "Parties"
or individually "Party"). Buyer and Seller agree as follows:

                                    RECITALS

          1.   Seller is a limited liability company created and existing under
               the laws of the State of Indiana, with its registered office at
               111 Monument Circle, Suite 2200, Indianapolis, Indiana.

          2.   Buyer is a corporation incorporated and existing under the laws
               of the State of Ohio with its principal place of business in
               Dayton, Ohio.

          3.   This Agreement contains the mutual promises and covenants
               pursuant to which Buyer as a purchaser of natural gas and
               portfolio administration services, and Seller as a merchant of
               natural gas and portfolio administration services, shall perform
               the transactions described herein.

          4.   Under this Agreement, Seller agrees to provide natural gas and
               portfolio administration services consistent with the terms and
               conditions contained herein.

          5.   Buyer has informed Seller that it is committed to the development
               and implementation of a customer choice program. Seller agrees to
               use its expertise to assist Buyer on gas supply issues during its
               transition to customer choice.

                                  DEFINITIONS

          The following terms shall have the following definitions for this
Agreement and its Appendices:

          1.   The term "ANR" shall mean ANR Pipeline Company.

          2.   The term "Balancing Quantities" shall mean the quantity of Gas
               which satisfies the difference between the Gas quantities
               scheduled for delivery to Buyer's Delivery Points and the actual
               physical flow of Gas taken by Buyer at the Delivery Points.

          3.   The term "Btu" shall mean British thermal unit, as defined in
               Transporter's Tariff

          4.   The term "CGT" shall mean Columbia Gulf Transmission Corporation.

          5.   The term "DOM" shall mean Dominion Pipeline Company.

          6.   The term "customer choice program" refers to implementation of an
               approved program for the unbundling of Buyer's gas supply sales
               from its local distribution services to its residential and small
               volume customers.

          7.   The term "Contract Month" shall mean a calendar month during the
               effectiveness of this Agreement, as interpreted in light of
               Transporter's Tariff.

<PAGE>  2

          8.   The term "Contract Rates" shall be the demand rates as described
               in Appendix C.

          9.   The term "Day" shall be defined as it is defined in
               "Transporter's Tariff," or as applied by "Transporter".

          10.  The term "Delivery Points" shall mean the points of delivery of
               Gas from Seller to Buyer as specified in Appendix A.

          11.  The term "FERC" shall mean the Federal Energy Regulatory
               Commission.

          12.  The term "Gas" shall mean natural gas.

          13.  The term "Maximum Daily Quantities" or "MDQ" shall mean the
               maximum quantity of Gas which Seller shall be obligated to supply
               on a firm basis to Buyer's Delivery Points on a particular day.

          14.  The term "Maximum Portfolio Entitlement" shall mean the maximum
               deliverability that Buyer is entitled to under the contracts
               identified on Appendix C.

          15.  The term "Maximum Seasonal Quantities" or "MSQ" shall mean the
               maximum quantity of Gas which Seller shall be obligated to supply
               on a firm basis to Buyer's Delivery Points in a Summer or Winter.

          16.  The terms "MMBtu", "Dekatherm" or "DTH" shall mean one million
               (1,000,000) BTUs.

          17.  The term "Nominated Daily Quantities" shall mean the quantity of
               Gas nominated on a particular day for delivery to Buyer's
               Delivery Points, including deliveries to storage for Buyer.

          18.  The term "PEPL" shall mean Panhandle Eastern Pipe Line Company.

          19.  The term "Portfolio Contracts" shall mean all of the contracts
               that may be utilized to deliver Gas to buyer, and which are
               identified on Appendix C.

          20.  The term "Summer" shall mean the summer season months of April
               through October, inclusive.

          21.  The term "TCO" shall mean Columbia Gas Transmission Corporation.

          22.  The term "TETCO" shall mean Texas Eastern Transmission
               Corporation.

          23.  The term "Texas Gas" shall mean Texas Gas Transmission
               Corporation.

          24.  The term "Transportation Credit" shall mean the Gas cost credit
               specified in Appendix C.

          25.  The term "Transporter" shall mean the transporting pipeline(s)
               interconnected with Buyer, including without limitation ANR, CGT,
               PEPL, TETCO, Dominion or Texas Gas, as applicable to the
               transaction involved.

          26.  The term "Transporter's Tariff" shall mean the tariff provisions
               of Transporter, as approved by the FERC, or any successor
               thereto, and Buyer's or Seller's contractual arrangements with
               Transporter, including changes to such tariff and arrangements
               made after this Agreement is effective.

<PAGE>  3

          27.  The term "TL" shall mean Trunkline Pipeline Company.

          28.  The term "Winter" shall mean the winter season months of November
               through March, inclusive.

<PAGE>  4

                              ARTICLE 1- GAS SALES

          1.1. Seller represents, agrees and warrants that Seller can and shall
stand ready to provide on a firm basis for Buyer's purchase at Buyer's Delivery
points the daily and seasonal quantities of gas set forth herein.

          1.2. During the term of this Agreement, unless Seller is unable to
meet Buyer's Gas requirements, Buyer agrees that Seller shall be its supplier of
Gas, either as its agent or as a vendor.

         1.3. The Maximum Daily Quantities, which Seller shall be obligated to
provide on a firm basis at Buyer's Delivery Points, are specified in Appendix B.

         1.4. The Maximum Seasonal Quantities during Winter or Summer, which
Seller shall be obligated to provide on a firm basis at the Delivery Points, are
specified in Appendix B.

         1.5. Buyer shall cause to be assigned to Seller, and Seller shall
accept, subject to the terms and conditions of the applicable assignment and
this Agreement, all of the Portfolio Contracts. In the event a third party
consent for the assignment of any Portfolio Contract cannot be obtained, Seller
is hereby appointed as agent for all purposes to administer such contracts until
such time as such an assignment is effected. Under this Agreement, Seller may
fulfill its obligation to provide Gas to Buyer by using both the Portfolio
Contracts and contracts entered into by and between Seller and third parties,
including suppliers, pipelines and other service providers. Seller shall not be
obligated to enter into commitments with suppliers, pipelines, or other service
providers, which extend beyond the term or scope of this Agreement.

         1.6. If FERC should determine that Transporter's Tariff shall cease to
apply, in whole or in part, to transactions hereunder, the Parties will promptly
meet to determine and negotiate mutually acceptable replacement guidelines and
standards. In that event, until an agreement is reached, the most recently
effective Transporter's Tariff shall continue to apply for all purposes under
this Agreement. Upon acceptance of the replacement guidelines and standards,
Buyer and Seller agree to apply the replacement guidelines and standards
retroactively to the cessation date of Transporter's Tariff. Any resolution
shall be implemented within thirty (30) days of the acceptance of the
replacement guidelines and standards.

                          ARTICLE 2- GAS SALES CHARGES

         2.1. For all Maximum Portfolio Entitlements, Buyer shall pay Seller
each Contract Month the then-applicable Contract Rates specified in the
contracts listed in Appendix C in order for Seller to stand ready to deliver Gas
to Buyer's Delivery Points on a firm basis. Seller shall provide Buyer the
Transportation Credit specified in Appendix C.

         2.2. Buyer shall pay Seller each Contract month the applicable supplier
reservation costs specified in Appendix D, as updated from time to time, as
provided in Article 6.

         2.3. For all commodity quantities, Buyer shall pay Seller each Contract
Month an amount determined by multiplying the applicable Nominated Daily
Quantities and Balancing Quantities for the Contract Month, by the applicable
price per MMBtu as determined pursuant to the commodity pricing provisions of
Appendix E. These pricing provisions shall reflect pricing methods for Gas
supply, and all other variable costs incurred by Seller as provided in Appendix
E. The other variable costs shall include all applicable costs, including,
without limitation, transportation commodity or usage charges, injection and
withdrawal costs, volumetric surcharges, and fuel as reflected in each
Transporter's Tariff and the applicable service agreements.

<PAGE> 5

         2.4. Buyer will pay taxes, if any, which are imposed with respect to
Gas delivered hereunder and which are not reflected in the pricing methods in
Appendix E; provided, however, Buyer shall have no obligation to pay any sales
or use taxes for which it delivers to Seller an appropriate exemption
certificate.

                              ARTICLE 3- BALANCING

         3.1. Seller shall provide Buyer with Balancing Quantities as part of
its gas sales and portfolio administration services.  Balancing procedures shall
be agreed to by the Parties.

                  ARTICLE 4- PORTFOLIO ADMINISTRATION SERVICES

         4.1. Seller's provision of portfolio administration services shall
include without limitation Gas acquisition, scheduling receipt and delivery
quantities with Gas suppliers and pipeline transporters, scheduling pipeline
storage inventory quantities, providing delivered Gas supplies, supply and
portfolio planning assistance, and periodic portfolio reporting. Buyer shall
retain complete unilateral control of its physical Gas delivery, distribution,
and transportation facilities.

          4.2. Supply planning/gas control procedures agreed to by the Parties
will govern the preparation and implementation of supply plans.

          4.3. Seller and Buyer shall review periodically Buyer's supply
requirements and determine the need for potential adjustments. All adjustments
are subject to Buyer's prior approval. Seller agrees that it will provide firm
pipeline transportation deliveries and Gas supply that will fully meet the MDQ
and MSQ of Buyer as set forth in the agreed upon supply plans. Replacement of
Portfolio Contracts shall be accomplished through an RFP process overseen by
Buyer.

          4.4. As set forth in the recitals, Seller will administer the
Portfolio Contracts in a manner designed to minimize capacity costs in order to
reduce gas costs and potential stranded costs. In order to assist Buyer with its
implementation of a Customer Choice Program, Seller agrees to provide Buyer with
the opportunity to reduce its Maximum Daily Quantities and Maximum Seasonal
Quantities in accordance with the Portfolio Reduction Rights specified in
Appendix B.

          4.5. Seller acknowledges that it will accept the assignment of
Portfolio Contracts under Section 1.5 subject to any existing rights of
transportation customers or other third parties to use that capacity, and
subject to any and all tariff obligations to assign or release capacity to
transportation customers or other third parties, including as part of a Customer
Choice Program. In the event this Agreement is terminated for any reason, Buyer
shall meet with Seller within five (5) days of notice of termination to reach
agreement on the timely return of capacity rights to Buyer. During such a
wind-up period, Seller shall continue to provide Buyer with necessary supply
services.

         4.6. As compensation for these services, Buyer shall pay Seller those
fees set out in Appendix F of this Agreement.

<PAGE>  6

                                 ARTICLE 5- TERM

          5.1. The services described above shall commence upon the date of
transfer of the gas distribution assets of Dayton Power & Light Company to
Buyer. The initial term of this Agreement shall be through October 31, 2005. If
neither Party terminates this Agreement by written notice at least twenty-four
(24) months prior to expiration of the initial term, the Agreement will remain
in effect for an additional one (1) year after the original expiration date.
Thereafter, the Agreement will continue year to year unless terminated by
written notice given at least twenty-four (24) months prior to the expiration
date of the then current Agreement.

         5.2. The continuation of some or all of the Seller's services during
the term shall be subject to and contingent upon changes in Buyer's supply
requirements as a result of its implementation of a customer choice program.

                        ARTICLE 6- CHANGES TO APPENDICES

         6.1. The Parties agree to make changes to Appendix A as necessary to
reflect changes in Buyer's Delivery Points.

         6.2. The Parties agree to make changes, after timely notice, to
Appendix B as necessary to reflect changes in Buyer's MDQ and MSQ. Buyer agrees
to pay any appropriate cost increases resulting from these changes.

         6.3. The Parties agree that Appendices C, D, E, and F will be subject
to change from time to time as provided in those Appendices.

         6.4. The Parties agree that changes in Appendix G can be made by either
party at any time. Buyer or Seller may change the notice information in Appendix
G by providing new designations to the other party by registered or certified
mail.

         6.5. The Parties agree that changes to Appendix H will occur only upon
mutual written agreement.

                              ARTICLE 7- OPERATIONS

          7.1. Buyer and Seller agree to accept for purposes of this Agreement
the applicable quality, delivery pressure, measurement and other applicable
rules, procedures, guidelines, tariff provisions, contractual arrangements and
policies of suppliers or Transporters, as the same may change from time to time.

                            ARTICLE 8- FORCE MAJEURE

         8.1. All obligations of the Parties to this Agreement shall be
suspended while and only for so long as compliance is prevented by a cause
beyond the control of the Party claiming force majeure, such as an Act of God,
war, civil disturbance, operational or performance failure or declaration of
force majeure by a supplier, leased storage field operator, transporter, or
other service provider, operational flow order(s), federal or state or local
law, or binding order of a court or governmental agency, provided the suspension
shall be only to the extent performance was prevented by the event of force
majeure and provided the Party claiming force majeure provides notice by
telephone or by telecopy with reasonably full particulars to the other Party at
or near the time the Party becomes aware of the force majeure. A Party claiming
force majeure hereunder shall have the duty to make all reasonable efforts to
remedy the force majeure condition as promptly as possible.

         8.2. Notice of force majeure must be provided to the designated
representatives for Buyer or Seller designated in Appendix G.

<PAGE>  7

                              ARTICLE 9- PENALTIES

          9.1. Seller shall be liable for all imbalance or other penalties,
cash-outs, or other costs imposed on Buyer or Seller by any third party,
including without limitation Seller's upstream or other transporters and
Transporters, to the extent that such penalties, cash-outs or other costs are
caused by Seller's actions or inaction. Buyer shall be liable for all imbalance
or other penalties, cash-outs, or other costs imposed on Buyer or Seller by any
third parties, including without limitation Seller's upstream or other
transporters and Transporters, to the extent that such penalties, cash-outs or
other costs are caused by Buyer's actions or inaction.

                         ARTICLE 10- BILLING AND PAYMENT

          10.1. Following each Contract Month, Seller shall furnish, or have
furnished, an itemized statement to Buyer stating the amounts due Seller
pursuant to this Agreement (the "Statement"). Following the receipt of Seller's
Statement, Buyer shall make Payment by the due date. Invoice date, due date, and
payment method shall be as specified in Appendix H.

          10.2. Interest shall accrue on all late payments commencing on the
applicable due date at the then current prime rate of Key Bank, Indianapolis,
Indiana, or its successor, or the maximum lawful rate, whichever is lower.

                              ARTICLE 11- REMEDIES

          11.1. If Seller fails to deliver scheduled Gas and such failure to
deliver is not excused under this Agreement, then Seller shall reimburse Buyer
for the amount of increased cost to Buyer of acquiring replacement Gas. The
amount owed by Seller to Buyer hereunder shall be calculated as the product of
(a) the difference, if positive, between (i) the price paid for replacement Gas,
including any additional transportation, fuel and other variable costs incurred
to receive such replacement Gas, and (ii) the then applicable commodity charge,
and (b) the difference between the scheduled Gas and the quantity of Gas
actually delivered by Seller. Buyer and Seller agree to act in good faith with
respect to purchases of such replacement Gas so as to minimize Seller's
obligations to Buyer under this Section.

          11.2. If Buyer fails to receive scheduled Gas and such failure to
receive is not excused under this Agreement, then Buyer shall reimburse Seller
in an amount calculated as the product of (a) the difference, if positive,
between (i) the then applicable commodity charge and (ii) the price received
from a third party purchaser, including any additional penalties,
transportation, fuel and other variable costs incurred to deliver Gas to a third
party purchaser, and (b) the difference between the scheduled Gas and the
quantity of Gas actually received by Buyer. Seller and Buyer agree to act in
good faith with respect to sales of such Gas to a third party purchaser so as to
minimize Buyer's obligations to Seller under this Section.

          11.3. The Parties agree that the actual losses incurred by a Party as
a result of the other Party's failure to deliver or receive quantities of Gas
would be uncertain and impossible to determine with precision. As a result, the
remedies provided in Article 11 for the failure to deliver or receive certain
quantities of Gas, respectively, shall be the failing Party's entire and sole
liability to the non-failing Party, and the right to recover such remedies shall
be the non-failing Party's sole and exclusive remedy for the failing Party's
failure or breach of its obligation to deliver or receive the scheduled Gas
under this Agreement. The remedies provided pursuant to this Article are in lieu
of and exclude any and all other liabilities of the failing Party as may be
provided by contract, equity, or law for any such failures or breaches,
including, without limitation, the obligation of either Party to deliver or
receive quantities hereunder in relation to the sale or purchase of Gas to or
from other parties.

<PAGE>  8

                           ARTICLE 12- CORRESPONDENCE

          12.1. Except as provided in Section 8.2, any notice, statement or bill
shall be in writing and shall be duly delivered when (a) mailed, postage
prepaid, by registered, certified, or first-class mail, or (b) sent by prepaid
overnight delivery to the applicable address, or (c) sent by hand delivery, or
(d) sent by facsimile directed to the appropriate person and facsimile number
with hand copy also delivered as in (a), (b), or (c) above. Addresses, telephone
numbers, and facsimile numbers are specified in Appendix G.

                            ARTICLE 13- MISCELLANEOUS

          13.1. This Agreement is subject to all applicable laws, orders, rules,
and regulations of any state or federal governmental body or official having
jurisdiction and both Seller and Buyer agree that the transactions agreed to
hereunder shall be conditioned upon compliance with all such laws, orders, rules
and regulations.

          13.2. Seller and Buyer expressly agree that laws of the State of Ohio
shall govern the validity, construction, interpretation, and effect of this
Agreement.

          13.3. Either Party may pledge, mortgage, or assign its rights
hereunder as security for indebtedness. This Agreement is otherwise
non-assignable except with the prior written consent of Buyer and Seller.

          13.4. This Agreement is conditioned on the continued solvency of Buyer
and Seller. If one Party becomes insolvent or seeks bankruptcy relief, the other
party may prospectively terminate this Agreement on prior written notice without
further obligation other than to pay for services or Gas previously provided.
Parties will implement wind-up provisions that are designed to reallocate the
Portfolio Contracts assigned in this Agreement in a fashion that will
re-establish the parties to as close as possible to their condition prior to the
execution of this Agreement.

          13.5. Notwithstanding any other provisions herein, the Parties hereto
waive any and all rights, claims, or causes of action arising under this
Agreement for incidental, consequential or punitive damages.

          13.6. Neither Buyer nor Seller intends for the provisions of this
Agreement to benefit any third party. No third party shall have any right to
enforce the terms of this Agreement against Buyer or Seller.

          13.7. The Parties acknowledge that their respective business records
and information are confidential in nature and may contain proprietary and trade
secret information. Notwithstanding the foregoing, Seller agrees to provide
Buyer access to those records required to verify Seller's Statements to Buyer.
Confidential records and information in the possession of either Party shall not
be divulged to third parties without prior consent of the other Party.

          13.8. No waiver by either Party of one or more defaults or breaches by
the other in performance of any of the terms or provisions of this Agreement
shall operate or be construed as a waiver of any future default or breach,
whether of a like or of a different character.

          13.9. The terms and conditions contained in this Agreement and its
Appendices herein constitute the full and complete agreement between the Parties
and any change to be made must be submitted in writing and executed by both
Parties.

<PAGE>  9

          13.10. Each Party represents that it has all necessary power and
authority to enter into and perform its obligations under this Agreement and
that this Agreement constitutes a legal, valid and binding obligation of that
Party enforceable against it in accordance with its terms, except as such
enforceability may be affected by any bankruptcy law or the application of
principles of equity.

          13.11. In the event any of the terms, covenants or conditions of this
Agreement, or any amendment hereto, or the application of any such terms,
covenants or conditions shall be held invalid as to any Party or circumstance by
any court having jurisdiction, all other terms, covenants, or conditions of this
Agreement, or any amendment hereto, and their application, shall not be affected
thereby and shall remain in full force and effect.

          13.12. If any provision of this Agreement is declared or rendered
unlawful by a court of law or regulatory authority with jurisdiction over either
of the parties or deemed unlawful because of a statutory or other change in the
law, or if either Party suffers a substantial economic detriment due either to a
determination relating to this Agreement by such an authority, or as a result of
fundamental changes in the marketplace or other substantial changes in existing
circumstances, the Parties will promptly meet to determine and negotiate a
mutually acceptable agreement on such replacement provisions necessary to
maintain the benefits and obligations that arise under this Agreement.

          IN WITNESS WHEREOF, the Parties hereto have executed this Agreement in
duplicate originals.

                              "SELLER"
                              PROLIANCE ENERGY, LLC

                              By:/s/ Terry S. Peak
                                 ------------------------------
                                  Terry S. Peak
                                  Its: Senior Vice President
                                       Trading and Gas Supply

                              "BUYER"
                              VECTREN ENERGY DELIVERY OF OHIO

                           By: /s/ Timothy M. Hewitt
                              -------------------------------
                                Timothy M. Hewitt
                                Interim President

<PAGE>  10

 Gas Sales And Portfolio Administration Agreement

                                APPENDICES INDEX

Buyer's Primary Delivery Points             A

Buyer's Maximum Quantities                  B

Portfolio Information                       C

Supplier Reservation Costs                  D

Commodity Purchases                         E

Portfolio Administration Service Fees       F

Notices                                     G

Invoice/Payment Data                        H

<PAGE>  11

Gas Sales And Portfolio Administration Agreement
                                                 Appendix A Original Page No. 1
APPENDIX A - Buyer's Primary Delivery Points

                       Buyers Delivery Points - Appendix A

    Meter Number         Name                        Pipeline

      124974             Farmersville                ANR
      153871             Lebanon/Castine             ANR

      108796             Lebanon/Red Lion            ANR

          33             Dayton Power and Light      Columbia Gas Transmission
       02830             Glen Karn                   Panhandle Eastern
        2559             Hollansburg                 Panhandle Eastern
       DAYPL             Rurals                      Panhandle Eastern

       73105             Gano Rd.                    Texas Eastern
       72907             Farmersville                Texas Eastern
       72906             Castine                     Texas Eastern
       72909             Red Lion                    Texas Eastern
       72902             Glen Karn                   Texas Eastern

        1720             Lebanon-Dayton              Texas Gas

Amendment

         Seller and Buyer Agree that this Appendix A may be amended as provided
in this Agreement, which amendment ultimately will be memorialized in a revised
Appendix A.

PROLIANCE ENERGY, LLC

By: /s/ Terry S. Peak
  --------------------------
    Terry S. Peak
  Its:  Senior Vice President
  Trading and Gas Supply

 VECTREN ENERGY DELIVERY OF OHIO

By: /s/ Timothy M. Hewitt
   ----------------------
   Timothy M. Hewitt
   Interim President

<PAGE>  12

Gas Sales And Portfolio Administration Agreement
                                                Appendix B Original Page No. 1
APPENDIX B - Buyer's Maximum Quantities

       Maximum Daily Quantities (DTH)

          April                      295,901
          ----------------------------------------

          May                        117,269
          ----------------------------------------

          June                        81,056
          ----------------------------------------

          July                        46,146
          ----------------------------------------

          August                      34,730
          ----------------------------------------

          September                   76,591
          ----------------------------------------

          October                    201,074
          ----------------------------------------

          November                   387,740
          ----------------------------------------

          December                   559,798
          ----------------------------------------

          January                    559,798
          ----------------------------------------

          February                   559,798
          ----------------------------------------

          March                      417,016
          ----------------------------------------

<PAGE>  13

Gas Sales And Portfolio Administration Agreement
                                                Appendix B Original Page No. 2

APPENDIX B - Buyer's Maximum Quantities

      Maximum Seasonal Quantities (DTH)

      Summer (Projected)                           12,098,902

      Winter (Projected)                           37,470,267
                             ---------------------------------

      Annual                                       49,569,169
Reduction Rights

         In order to assist Buyer with the implementation of its Customer Choice
Program, Seller agrees to provide Buyer with the ability to reduce the amount of
capacity under contract for its system supply requirements, thereby mitigating
the level of gas costs and the amount of stranded capacity costs. Prior to
October 31st of each of the years listed below, and effective twelve (12) months
after the notification date , the Parties will determine whether the level of
system supply demand has been or will be reduced, and based upon this
evaluation, the Buyer shall have the right to notify Seller of its request to
reduce the amount of capacity and storage services received and paid for under
this Agreement up to or equal to the percent reductions listed:

         Year                       Reduction Amount          Cumulative Rights
         ----                       ----------------          -----------------
October 31, 2002                          5%                           5%

October 31, 2003                          8%                          13%

October 31, 2004                         10%                          23%

         Any reduction shall be in the amount of peak and average day
deliverability to Buyer's system provided by the Portfolio Contracts at that
time, and shall include appropriate reductions for both storage deliverability
and firm transportation. The reductions shall also be spread between Buyer's
various pipeline portfolio delivery entitlements in a manner agreed to by the
Parties. Buyer shall provide written notice to Seller in accordance with this
Agreement. Pursuant to the Cumulative Rights, if Buyer does not exercise its
full reduction rights in a given year, it may in a succeeding year exercise
reduction rights up to the amount of the cumulative rights provided for above.

Amendment

         Seller and Buyer Agree that this Appendix B may be amended as provided
in this Agreement, which amendment ultimately will be memorialized in a revised
Appendix B.
PROLIANCE ENERGY, LLC

By: /s/ Terry S. Peak
 --------------------------
      Terry S. Peak
   Its:  Senior Vice President
   Trading and Gas Supply

VECTREN ENERGY DELIVERY OF OHIO

By: /s/ Timothy M. Hewitt
  -------------------------
     Timothy M. Hewitt
     Interim President

<PAGE>  14

Gas Sales And Portfolio Administration Agreement
                                                Appendix C Original Page No. 1
APPENDIX C - Portfolio Information

I.    Contracts and Contract Rates
          The applicable demand costs shall be determined based upon the rates
and charges specified in each Transporter's Tariff including any applicable
direct bills, surcharges, or as other costs specified by the sheets identified
below, or other applicable sheets, as all of those sheets may be in effect from
time to time, and costs arising under applicable agreements, including the
agreements identified below, as well as this Agreement. While Seller and Buyer
agree that the identified tariff sheets and agreements are intended to be a
complete listing of the applicable tariff sheets and applicable agreements, they
further agree that the omission of the reference of one or more sheets or
agreements from that list will not affect Buyer's obligation to Seller for
rates, charges and costs incurred thereunder. Seller shall provide to Buyer all
Transporter refunds that are derived from rate case settlements or
administrative adjudications that are received by Seller relative to Contracts
or Contract Rates referenced below or relative to any agreements referencing the
contracts below.

                          Contracts and Contract Rates

  Pipeline              Contract    Contract Type      Contract Rate

   ANR
                          99914        FTS-1           Sheet No. 7
                          99915         GF-1           Sheet No. 68G

   Columbia Gas
                          37995         FSS            Sheet No. 29
                          38021         SST            Sheet No. 26
                          38097         FTS            Sheet No. 25
                          57908         FTS            Sheet No. 25

   Columbia Gulf
                          38040        FTS-1           Sheet No. 18

   Panhandle
                          12769         EFT            Sheet No. 5
                          12770         EFT            Sheet No. 5
                          15564         EFT            Tariff Letter
                          15567         FS             Sheet No. 11

   Texas Eastern
                         830027        FT-1            Tariff Letter
                         870170        LLFT            Tariff Letter
                         870173        LLFT            Tariff Letter
                         870172        LLFT            Tariff Letter

   Texas Gas
                        T006057         FT             Sheet No.11

   Trunkline
                          14878         EFT            Tariff Letter
                          15435         EFT            Tariff Letter

<PAGE>  15

Gas Sales And Portfolio Administration Agreement
                                                Appendix C Original Page No. 2

II Transportation Credit

1.   Seller shall provide to Buyer, as a credit against the Contract Rates, a
     Transportation Credit ("TC") for the sale from the Buyer to Seller of
     projected available annual portfolio entitlements.
2.   For purposes of determining the TC, the value of projected available
     entitlements sold to Seller has been agreed to based upon publicly reported
     pricing data from Inside FERC and Gas Daily publications at applicable
     supply and delivery points. The base year amount of projected available
     entitlements is based upon the 2000/2001 gas supply plan.
3.   The Transportation Credit shall be recalculated once per year prior to
     October 31st, to reflect changes in projected available annual
     entitlements, based on the following formula:

    TC Base TC x Projected Available Annual Entitlements
                 Base Available Annual Entitlements

Where:   a. Base TC = $1,388,609
         b.  Base Available Annual Entitlements = 19,045,012 Dth
         c.  Projected Available Annual Entitlements = Total Entitlements -
                Normal Demand
             (i)  Total Entitlements are the sum of the quantities of long haul
                  pipeline transportation entitlements reserved by Buyer.
             (ii) Normal Demand is the projected normal weather quantity of
                  Buyer's firm long haul pipeline deliveries for firm customers.

4.   The TC shall be divided among months based upon the projected available
     monthly entitlements.

Amendment

         Seller and Buyer Agree that this Appendix C may be amended as provided
in this Agreement, which amendment ultimately will be memorialized in a revised
Appendix C.
PROLIANCE ENERGY, LLC

By: /s/ Terry S. Peak
  --------------------------
    Terry S. Peak
  Its:  Senior Vice President
  Trading and Gas Supply

VECTREN ENERGY DELIVERY OF OHIO

By: /s/ Timothy M. Hewitt
  ---------------------------
   Timothy M. Hewitt
   Interim President

<PAGE>  16

Gas Sales And Portfolio Administration Agreement
                                                Appendix D Original Page No. 1

APPENDIX D - Supplier Reservation Costs
I.  Reserved Commodity Quantities

   a.  Monthly Baseload Reserved quantity (DTH)

   b.  Daily Swing Reserved quantity (DTH)

II.  Applicable Reservation Rates ($____ DTH/day)

             Winter Months                           Summer Months
             -------------                           -------------
  Monthly Index       Daily Index         Monthly Index       Daily Index
  Reserved Quantity   Reserved Quantity   Reserved Quantity   Reserved Quantity

Amendment

      Seller and Buyer Agree that this Appendix D may be amended as provided in
this Agreement, which amendment ultimately will be memorialized in a revised
Appendix D.

PROLIANCE ENERGY, LLC

By:  /s/ Terry S. Peak
 ---------------------------
     Terry S. Peak
  Its:  Senior Vice President
  Trading and Gas Supply

VECTREN ENERGY DELIVERY OF OHIO

By: /s/ Timothy M. Hewitt
  ------------------------
   Timothy M. Hewitt
   Interim President

<PAGE> 17

Gas Sales And Portfolio Administration Agreement
                                               Appendix E Original Page No. 1

APPENDIX E -Commodity Purchases

          This Appendix E addresses the gas supply and other variable costs
applicable to Nominated Daily Quantities and Balancing Quantities as identified
below.

Monthly Baseload Purchases:

          Buyer shall pay to Seller each Contract Month an amount determined by
multiplying the monthly baseload quantities of Gas scheduled for Buyer's
purchase under this Agreement during the Contract Month, by a price per MMBtu
determined using the first monthly index from Inside FERC's GAS MARKET REPORT in
the table "PRICES OF SPOT GAS DELIVERED TO INTERSTATE PIPELINES" for the
applicable zone, specified below, for the applicable month, plus all other
applicable variable costs as identified below shall apply.

o        ANR Pipeline Co. - Louisiana
o        Columbia Gas Transmission Corp. - Appalachia
o        Columbia Gulf Transmission Corp. - Louisiana
o        Panhandle Eastern Pipeline Co. -Oklahoma
o        Trunkline Gas Co. -Louisiana
o        Texas Gas Transmission - Zone SL
o        Texas Gas Transmission - Zone 1
o        CNG Transmission Corp. - Appalachia

Daily Swing Purchases:

          Buyer shall pay to Seller each Contract Month an amount determined by
summing all applicable "Daily Amounts" for the Contract Month. A "Daily Amount"
shall be calculated for each day during the Contract Month for which daily swing
quantities of Gas have been confirmed for purchase. The "Daily Amounts" shall be
determined by multiplying (a) the confirmed swing quantities of gas scheduled
for the particular day of the Contract Month, by (b) a price per MMBtu
determined using the arithmetic average of the high and low prices in the price
range reported in Gas Daily, in the table "DAILY PRICE SURVEY," for the
applicable zone, specified below, for the applicable day. As to any day for
which Gas Daily for any reason (e.g. holidays and weekends) does not publish the
above referenced prices, the applicable prices shall be that utilized for the
last prior day such is published. In addition, all other applicable variable
costs as identified below shall apply.

o Louisiana Onshore South - ANR
o Louisiana Onshore South - Columbia, Mainline
o Louisiana Onshore South - Texas Gas SL
o Louisiana Onshore South - Trunkline ELA
o Oklahoma - PEPL
o Appalachia - CNG South Point
o Appalachia - Columbia, App.
o East Texas - North Louisiana Area - Texas Gas (entire Z1)

<PAGE>  18

Optional Diversified Pricing:

         For any purchases of monthly or daily supplies that Buyer decides to
purchase at prices based on fixed or collared contracts, or using other
alternative pricing methods, pricing shall be at market terms as negotiated by
the Parties.

For Summer Storage Refill:

          For summer refill of leased storage, Buyer shall pay to Seller an
amount based on averaging the seven summer monthly indices for the applicable
supply area, and based upon presuming storage refill quantities to be equally
split between the summer months.

<PAGE>  19

Gas Sales And Portfolio Administration Agreement
                                               Appendix E Original Page No. 2

For Storage Withdrawals:

         For quantities of storage withdrawals for which Buyer has previously
paid for commodity, applicable storage withdrawal variable costs as identified
below shall apply.

For Applicable Indices:

      System                         Applicable Monthly Indices
-------------------------------- ---------------------------------------------

ANR Pipeline Co.                 IF - ANR Pipeline Co. - Louisiana
-------------------------------- ---------------------------------------------

Columbia Gas Transmission        IF - Columbia Gas Transmission Corp. -
                                      Appalachia
-------------------------------- ---------------------------------------------

Columbia Gulf Transmission       IF - Columbia Gulf Transmission Corp. -
                                      Louisiana
-------------------------------- ---------------------------------------------

Panhandle Eastern Pipeline Co.   IF - Panhandle Eastern Pipeline Co. -Oklahoma
-------------------------------- ---------------------------------------------

Trunkline Gas Co.                IF - Trunkline Gas Co. -Louisiana
-------------------------------- ---------------------------------------------

Texas Gas Transmission           IF - Texas Gas Transmission - Zone SL
-------------------------------- ---------------------------------------------

Texas Gas Transmission           IF - Texas Gas Transmission - Zone 1
-------------------------------- ---------------------------------------------

<PAGE>  20

Gas Sales And Portfolio Administration Agreement
                                               Appendix E Original Page No. 3

             APPENDIX E- Commodity Purchases - Other Variable Costs

         The other variable costs applicable to Nominated Daily Quantities and
Balancing Quantities shall be determined based upon the rates and charges
applicable under each transporter's tariff including the sheets identified
below, as well as other applicable sheets, as all of those sheets may be in
effect from time to time, and costs arising under applicable agreements,
including the agreements identified below, as well as this Agreement.

   PEPL                       Contract No.                       Contract Rate

   ANR                        Contract No.                       Contract Rate

   Texas Gas                  Contract No.                       Contract Rate

   Texas Eastern              Contract No.                       Contract Rate

                  While Seller and Buyer agree that the identified tariff sheets
and agreements are intended to be a complete listing of the applicable tariff
sheets and applicable agreements, they further agree that the omission of the
reference of one or more sheets or agreements from that list will not affect
Buyer's obligation to Seller for rates, charges and costs incurred thereunder.

Amendment

         Seller and Buyer Agree that this Appendix E may be amended as provided
in this Agreement, which amendment ultimately will be memorialized in a revised
Appendix E.

PROLIANCE ENERGY, LLC

By: /s/ Terry S. Peak
-------------------------
     Terry S. Peak
   Its:  Senior Vice President
   Trading and Gas Supply

VECTREN ENERGY DELIVERY OF OHIO

By:  /s/ Timothy M. Hewitt
  --------------------------
    Timothy M. Hewitt
    Interim President

<PAGE>  21

Gas Sales And Portfolio Administration Agreement
                                                Appendix F Original Page No. 1

APPENDIX F - Portfolio Administration Service Fees

Portfolio Administration Service Fee

          In each month of year one of the initial term of this Agreement, Buyer
shall pay to Seller a fee equal to one-twelfth of $450,000, which shall be
referred to as the "Base Year Amount". For purposes of this Appendix F, year one
shall be the twelve-month period beginning October 1, 2000. In year two, the
Base Year Amount shall be adjusted to reflect the annual effect of the
application of the Consumer Price Index for the preceding year, minus a
productivity factor of one percent, provided that, in no event shall the
adjustment be a negative number. The Base Year Amount shall be similarly
adjusted each year during the initial term of the Agreement, each annual
adjustment being cumulative of all prior adjustments.

         The Parties agree that in the event there occurs a material change in
the circumstances which resulted in the execution of this Agreement, e.g.,
fundamental change in the natural gas market place or a significant change in
the nature or extent of the services to be provided or received hereunder, and
which materially impacts the portfolio administration service costs, the Parties
will negotiate in good faith to account for that material change in the
circumstances and to adjust the portfolio administration service fee
accordingly.

Amendment

         Seller and Buyer agree that this Appendix F may be amended from time to
time by mutual agreement of the Parties, which ultimately will be memorialized
in a revised Appendix F.

<PAGE>

PROLIANCE ENERGY, LLC

By: /s/ Terry S. Peak
  -------------------------
     Terry S. Peak
   Its:  Senior Vice President
   Trading and Gas Supply

VECTRON ENERGY DELIVERY OF OHIO

By: /s/ Timothy M. Hewitt
  ---------------------------
     Timothy M. Hewitt
     Interim President

<PAGE> 22

Gas Sales And Portfolio Administration
                                                Appendix G Original Page No. 1

                          APPENDIX G - Notices
---------------------------------       ------------------------------------

Invoice Information:
-------------------

Buyer:                                   Seller:
-----                                    -------

Vectren Energy Delivery of Ohio          J. Groth
Corporate Accounting                     ProLiance Energy, LLC
Attn:  Jeanne Walter                     111 Monument Circle, Suite 2200
1630 North Meridian Street               Indianapolis, IN 46204-5178
Indianapolis, IN 46202                   (317) 231-6800
(317) 321-0461
----------------------------------       -----------------------------------

Payments:
--------

Buyer:                                   Seller
-----                                    -------

National City Bank                       Bank One
For the Account of:                      For the Account of
   Vectren Energy Delivery of Ohio       ProLiance Energy, LLC
----------------------------------       -----------------------------------
Supply Plans/Operational/Force Majeure:

Buyer:                                    Seller:
-----                                     -------
Supply Plans                              Steve Miner
Chris Kershner                            (317) 231-6828
(317) 321-0583
----------------------------------        ----------------------------------

Operational                                Operational
-----------                                -----------
Randy Gary                                 Steve Miner
(317) 321-0507                             (317) 231-6828
----------------------------------         ---------------------------------

<PAGE> 23

Gas Sales And Portfolio Administration
                                                 Appendix G Original Page No. 2
                              APPENDIX G - Notices
--------------------------------------         -------------------------------

Force Majeure                                  Force Majeure
-------------                                  -------------
Randy Gary (317) 321-0507                      Steve Miner
Frank Lindsey (317) 321-0334                   (317) 231-6828
Gas Controller on Duty (317) 321-0535          ProLiance Energy, LLC
Vectren Energy Delivery of Ohio                111 Monument Circle, Suite 2200
1630 North Meridian Street                     Indianapolis, IN 46204-5178
Indianapolis, IN 46202                         (317) 231-6800 (Telecopy)
(317) 321-0787 (Telecopy)
--------------------------------------         -------------------------------

All Other Notices:                             All Other Notices:

Buyer:                                         Seller:
-------                                        -------

Gas Control Department                         ProLiance Energy, LLC
Attn:  Randy Gary                              Attn:  John R. Talley
1630 North Meridian Street                     111 Monument Circle
Indianapolis, IN 46202                         Indianapolis, IN 46204-1578
--------------------------------------         -------------------------------

Amendment

         Seller and Buyer agree that this Appendix H may be amended from time to
time by mutual agreement of the Parties, which amendment ultimately will be
memorialized in a revised Appendix H.

PROLIANCE ENERGY, LLC

By: /s/ Terry S. Peak
-----------------------------
     Terry S. Peak
   Its:  Senior Vice President
   Trading and Gas Supply

VECTREN ENERGY DELIVERY OF OHIO

By: /s/ Timothy M. Hewitt
  ---------------------------
      Timothy M. Hewitt
      Interim President

<PAGE>  24

Gas Sales And Portfolio Administration Agreement
                                                Appendix H Original Page No. 1

APPENDIX H- Invoice/Payment Data

Invoice Date -      On or before the tenth (10th) day after the Contract Month.
Due Date -          Ten (10) days after receipt of invoice.
Payment Method -    By wire transfer to account specified on invoice.

Amendment

         Seller and Buyer agree that this Appendix H may be amended from time to
time by mutual agreement of the Parties, which amendment ultimately will be
memorialized in a revised Appendix H.

PROLIANCE ENERGY, LLC

By: /s/ Terry S. Hewitt
  ----------------------------
     Terry s. Hewitt
   Its:  Senior Vice President
   Trading and Gas Supply

VECTREN ENERGY DELIVERY OF OHIO

By: /s/ Timothy M. Hewitt
  --------------------------
     Timothy M. Hewitt
     Interim President

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