EXHIBIT 10-C GAS SALES AND PORTFOLIO ADMINISTRATION AGREEMENT THIS GAS SALES AND PORTFOLIO ADMINISTRATION AGREEMENT ("Agreement") is entered and effective the 15th day of March, 1996, for services to begin April 1, 1996, by and between INDIANA GAS COMPANY, INC. ("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 One North Capitol Avenue, Indianapolis, Indiana. 2. Buyer is a corporation incorporated and existing under the laws of the State of Indiana with its principal place of business at 1630 North Meridian Street, Indianapolis, Indiana. 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. 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 "Contract Month" shall mean a calendar month during the effectiveness of this Agreement, as interpreted in light of Transporter's Tariff. 5. The term "Contract Rates" shall be the demand rates as described in Appendix C. 6. The term "Day" shall be defined as it is defined in "Transporter's Tariff," or as applied by "Transporter." 7. The term "Delivery Points" shall mean the points of delivery of Gas from Seller to Buyer as specified in Appendix A. 8. The term "FERC" shall mean the Federal Energy Regulatory Commission. 9. The term "Gas" shall mean natural gas. 10. 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. 11. The term "Maximum Portfolio Entitlement" shall mean the maximum deliverability that Buyer is entitled to under the contracts identified on Appendix C. 12. 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. 13. The terms "MMBtu," "Dekatherm" or "DTH" shall mean one million (1,000,000) Btus. 14. 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. 15. The term "PEPL" shall mean Panhandle Eastern Pipe Line Company. 16. The term "Portfolio Contracts" shall mean all of the contracts that may be utilized to provide Gas to Buyer, except as provided in Section 1.2, and which are identified on Appendix C. 17. The term "Summer" shall mean the summer season months of April through October, inclusive. 18. The term "TETCO" shall mean Texas Eastern Transmission Corporation. 19. The term "Texas Gas" shall mean Texas Gas Transmission Corporation. 20. The term "Transportation Credit" shall mean the Gas cost credit specified in Appendix C. 21. The term "Transporter" shall mean the transporting pipeline(s) interconnected with Buyer, including without limitation ANR, PEPL, TETCO or Texas Gas, as applicable to the transaction involved. 22. 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. 23. The term "Winter" shall mean the winter season months of November through March, inclusive. 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 sole supplier of Gas. However, Buyer shall have and maintain the right to produce, utilize, purchase or sell any and all: (a) Gas produced in Indiana which Buyer may be required to purchase under Ind. Code 8-1-2-87.6 or any successor provision thereto of the Indiana Code, or (b) propane. 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 assign or release, or cause to be assigned or released, to Seller, and Seller shall accept, subject to the terms and conditions of the applicable assignment, release or agency contract (as set forth below), all of the Portfolio Contracts. In the event a third party consent for the assignment or release of any Portfolio Contract cannot be obtained or an assignment or release would not be economically desirable or timely, Seller is hereby appointed as agent for all purposes to administer such contracts until such time as such an assignment or release 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 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. 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. Buyer and Seller agree that during the term of this Agreement Seller shall provide all of Buyer's portfolio administration services. 4.2. Seller's 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, and periodic portfolio reporting. Buyer shall retain complete unilateral control of its physical Gas delivery, distribution, transportation and storage facilities. 4.3. Seller shall provide Gas supply planning to Buyer as part of its portfolio administration services. Supply planning/gas control procedures shall be agreed to by the Parties to govern the preparation and implementation of the supply plans. 4.4. Seller shall provide portfolio planning as part of its portfolio administration services. Seller and Buyer shall review periodically Buyer's supply requirements for potential changes. Any portfolio entitlement changes are subject to Buyer's prior approval. Seller shall represent Buyer in negotiations with suppliers and pipelines to effectuate the portfolio changes. Seller agrees that it will maintain for Buyer's benefit firm contracts for transportation and other delivery services (specifying Buyer's primary Delivery Points) and Gas supply that will fully meet the MDQ and MSQ of Buyer as set forth in the agreed upon supply plans. 4.5. During the term of this Agreement, Seller shall review all FERC regulatory filings that could reasonably be expected to impact the Gas supply or portfolio administration services provided by Seller to Buyer. Seller shall inform Buyer on a timely basis of Seller's review and analysis. Buyer shall timely communicate its interests to Seller. Seller shall provide for representation to protect the Parties' interests in FERC proceedings and related appeals and notify Buyer promptly concerning any conflict of interest it may identify. In the event Seller's interests conflict with those of Buyer, Buyer and Seller shall be free to represent their interests directly. Seller shall provide Buyer with periodic written reports on the status of such proceedings in which Seller represents Buyer. 4.6. During the term of this Agreement, Buyer agrees to pay Seller the portfolio administration service fee specified in Appendix F. ARTICLE 5 - TERM 5.1. The initial term of this Agreement shall be through October 31, 2000. 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. Notwithstanding the provisions of Section 5.1, this Agreement shall not remain in effect beyond, and shall terminate upon, the expiration of the wind-up period specified in Section 6.03 of Seller's Fundamental Operating Agreement. During the course of any such wind-up of Seller's affairs, the sole supplier requirements established in Sections 1.2 and 4.1 of this Agreement shall be waived with respect to any Gas or related services under any Portfolio Contracts assigned or transferred to Buyer or its designee, or released from any agency established under this Agreement, pursuant to Section 6.05 of the above- referenced Fundamental Operating Agreement. Any minimum purchase requirements imposed on Buyer under this Agreement shall be reduced accordingly. The portfolio administration service fee during the wind-up period shall be reduced to the extent reductions in actual portfolio administration costs occur. 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, F and I 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 Transporter, 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, with written confirmation sent within seventy-two (72) hours. 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 representatives for Buyer or Seller designated in Appendix G. 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 National City 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 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. 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 telecopy directed to the appropriate person and telecopy number with hard copy also delivered as in (a), (b) or (c) above. Addresses, telephone numbers, and telecopy numbers are specified in Appendix G. ARTICLE 13 - RENEGOTIATION TO PRESERVE AGREEMENT 13.1. 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. ARTICLE 14 - MISCELLANEOUS 14.1. 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. 14.2. Seller and Buyer expressly agree that laws of the State of Indiana shall govern the validity, construction, interpretation and effect of this Agreement. 14.3. 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. 14.4. 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. In the event of such termination, in order to ensure the continued reliable provision of gas supply service to Buyer's customers, the wind-up provisions of Section 6.05 of the Fundamental Operating Agreement shall apply. 14.5. 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. 14.6. 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. 14.7. 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. 14.8. In interpretation and construction of this Agreement, no presumption shall be made against any Party on grounds such Party drafted the Agreement or any provision thereof. 14.9. 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. 14.10. 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. 14.11. 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. 14.12. Seller agrees that there shall be no pattern of adverse distinction and no pattern of undue discrimination in carrying out its obligations under this Agreement relating to Buyer as compared to other parties to whom Seller furnishes Gas supply and portfolio administration services. 14.13. 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. IN WITNESS WHEREOF, the Parties hereto have executed this Agreement in duplicate originals. "SELLER" PROLIANCE ENERGY, LLC By: /s/Carl L. Chapman Carl L. Chapman President "BUYER" INDIANA GAS COMPANY, INC. By: /s/Jerrold L. Ulrey Jerrold L. Ulrey Vice President INDEX TO APPENDICES APPENDIX A - Buyer's Delivery Points APPENDIX B - Buyer's Maximum Quantities APPENDIX C - Portfolio Information APPENDIX D - Supplier Reservation Costs APPENDIX E - Commodity Purchases APPENDIX F - Portfolio Administration Service Fee APPENDIX G - Notices APPENDIX H - Invoice/Payment Data Gas Sales And Portfolio Administration Agreement APPENDICES INDEX Appendix Title A Buyer's Primary Delivery Points B Buyer's Maximum Quantities C Portfolio Information D Supplier Reservation Costs E Commodity Purchases F Portfolio Administration Service Fees G Notices H Invoice/Payment Data I Diversion of Entitlements APPENDIX A - Buyer's Primary Delivery Points North/East System Delivery Point Delivery Point 2509 Dana 010530070 Dunkirk 2510 Danville 032150100 Muncie 2515 Elwood 037045550 ANR Storage Facilities 2516 Fairmount ANRX22 Storage Injection Points 2530 Noblesville PEPL IND GAS-INJ 2531 North Salem CGCU Points of Interconnection 2535 Richmond with Citizens Gas & 2538 Tipton Coke Utility 2576 Huntington 2597 Crawfordsville 2605 Upland 2684 Unionport 2751 Montpelier 2754 Sheridan 2757 Bloomingdale 2772 Newport 2780 Lebanon 2795 Anderson 2796 Zionsville 2812 Carpentersville 2822 Fowlerton 2823 Richmond 5233 Anderson 121N Rural 5530 Cent. Ind. Rurals 5531 West of Zionsville 5532 North of Zionsville 5534 East of King 5864 King 010530010 East Hancock School 010530030 Hope APPENDIX A - Buyer's Primary Delivery Points Central/Terre Haute System Delivery Point 14411 Bedford 14412 Bedford 14431 Columbus 14432 Columbus 14433 Columbus 14461 Bargersville 14463 Bargersville 14481 Mitchell 14482 Mitchell 14491 Needmore 14492 Needmore 14493 Needmore 14501 Seymour 14511 Waynesville 14512 Waynesville 14521 Rural (Mitchell) 14522 Rural (Martinsville) 14523 Rural (Terre Haute) 14531 Crane 14533 Crane 18421 Sand Cut 18422 Sand Cut 18423 Sand Cut 18424 Sand Cut APPENDIX A - Buyer's Primary Delivery Points Central/Terre Haute System (Continued) Delivery Point 18451 Clinton 18452 Clinton 18461 Hercules Clinton 18462 Hercules Clinton 18491 Terre Haute-2 18492 Terre Haute-2 18501 Terre Haute-3 18502 Terre Haute-3 18511 Terre Haute-4 18521 Stuckey Rd. 18522 Stuckey Rd. 18523 Stuckey Rd. 18531 Rural Ind. 18541 Terre Haute-6 18542 Terre Haute-6 18571 Magaret (Terre Haute) 18573 Magaret (Terre Haute) 037047100 West Shelbyville CGCU Points of Interconnection with Citizens Gas & Coke Utility APPENDIX A - Buyer's Primary Delivery Points South System Delivery Point 17031 Locust, KY 17032 Locust, KY 17251 Crestwood, KY 17252 Crestwood, KY Greensburg System Delivery Point 70017 Greensburg 70940 Westport TETCO TETCO Storage Facilities 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 INDIANA GAS COMPANY, INC. By: /s/Carl L. Chapman By: /s/Jerrold L. Ulrey Carl L. Chapman Jerrold L. Ulrey Its: President Its: Vice President-Gas Supply & Rates APPENDIX B - Buyer's Maximum Quantities Maximum Daily Quantities (in Dth) Central/ Month North/East Terre Haute South Greensburg April 257,000 125,000 31,500 3,420 May 206,000 94,900 20,100 2,610 June 152,000 70,800 15,400 2,630 July 94,100 38,900 5,530 1,550 August 119,000 52,800 9,890 2,020 September183,000 88,200 20,900 3,220 October 251,000 112,000 37,600 5,060 November 366,000 180,000 46,700 5,590 December 482,000 217,000 66,700 7,330 January 505,000 220,000 72,400 7,330 February 469,000 220,000 63,900 7,300 March 395,000 186,000 50,800 5,860 Maximum Seasonal Quantities (in Dth) Central/ Month North/East Terre Haute South Greensburg Summer 1996 11,202,130 5,850,260 1,676,840 267,145 Winter 1996-97 38,579,050 21,473,920 5,513,670 697,710 APPENDIX B - Buyer's Maximum Quantities 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 INDIANA GAS COMPANY, INC. By: /s/Carl L. Chapman By: /s/Jerrold L. Ulrey Carl L. Chapman Jerrold L. Ulrey Its: President Its: Vice President-Gas Supply & Rates 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 which are received by Seller relative to Contracts or Contract Rates referenced below or relative to any agreements referencing the contracts below. Contract No. Contract Rate 11713 Sheet No. 11 11714 Sheet No. 5 11715 Sheet No. 5 11716 Sheet No. 5 11718 Sheet No. 5 11719 Tariff Letter 11720 Tariff Letter 11721 Sheet No. 5 12044 Sheet No. 11 12045 Sheet No. 5 X-22 Sheet No. 16 Sheet No. 14 Sheet No. 15 19100 Sheet No. 7 Sheet No. 17 Sheet No. 17A Sheet No. 18 Appendix C - Portfolio Information Contract No. Contract Rate 20250 Sheet No. 7 Sheet No. 17 Sheet No. 17A Sheet No. 18 20300 Sheet No. 7 Sheet No. 17 Sheet No. 17A Sheet No. 18 32300 Sheet No. 10 33050 Sheet No. 10 70300 Sheet No. 68G N0325 Sheet No. 10 Sheet No. 10 T3780 Sheet No. 11 Sheet No. 11 N0420 Sheet No. 10 Sheet No. 10 T3739 Sheet No. 11 Sheet No. 11 800171 Sheet No. 35 400109 Sheet No. 43 WSS Appendix I PSS Appendix I Appendix C - Portfolio Information 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. The Transportation Credit shall be calculated from time to time 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 = $1,864,000 b. Base Available Annual Entitlements = 35,913,000 Dth c. Projected Available Annual Entitlements = Total Entitlements - Normal Demand (i) Total Entitlements are the sum of the quantities of longhaul pipeline transportation entitlements reserved by Buyer. (ii) Normal Demand is the projected normal weather quantity of Buyer's firm longhaul pipeline deliveries for firm customers. 3. 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 from time to time by mutual agreement of the Parties, which ultimately will be memorialized in a revised Appendix C. PROLIANCE ENERGY LLC INDIANA GAS COMPANY, INC. By: /s/Carl L. Chapman By: /s/Jerrold L. Ulrey Carl L. Chapman Jerrold L. Ulrey Its: President Its: Vice President-Gas Supply & Rates APPENDIX D - Supplier Reservation Costs Supplier Reservation Costs April 1, 1996 to October 31, 1996 I. Reserved Commodity Quantities a. Monthly Baseload Reserved Quantity (dth) System Central/ Month North/East Terre Greensburg South Haute April 110,424 39,136 2,927 9,914 May 86,222 25,047 2,764 3,914 June 73,595 25,047 2,493 2,087 July 68,830 22,556 1,680 2,087 August 70,438 25,047 2,190 2,087 September 72,542 25,047 2,493 2,087 October 88,326 35,483 1,689 2,087 APPENDIX D - Supplier Reservation Costs b. Daily Swing Reserved Quantity (dth) System Central/ Month North/East Terre Greensburg South Haute April 124,774 8,179 1,061 12,071 May 145,894 10,787 65 17,063 June 87,216 0 358 13,985 July 0 0 0 3,684 August 36,708 0 0 8,234 September 116,746 22,268 997 19,724 October 136,038 11,832 1,222 16,415 II. Applicable Reservation Rates (dth/day) System Winter Months April, 1996** Monthly Daily Monthly Daily Index Index Index Index Reserved Reserved Reserved Reserved Quantity Quantity Quantity Quantity North/East * * $0.023 $0.0315 Central/Terre Haute * * $0.01636 $0.00606 Greensburg * * $0.025 $0.045 South * * $0.01636 $0.00606 *To be determined. **October prices are to be determined, other Summer 1996 months are $0.00. APPENDIX D - Supplier Reservation Costs Assignment/Agency Administration of Supply Agreements Buyer and Seller agree that quantities reserved under supply reservation contracts entered into by Buyer prior to April 1, 1996, and for which Seller has accepted assignment or agency administration duties, shall be included in the Reserved Commodity Quantities with Applicable Reservation Rates as set forth in the original supply reservation contracts. Amendment Seller and Buyer agree that this Appendix D may be amended from time to time by mutual agreement of the Parties, which ultimately will be memorialized in a revised Appendix D. PROLIANCE ENERGY, LLC INDIANA GAS COMPANY, INC. By: /s/Carl L. Chapman By: /s/Jerrold L. Ulrey Carl L. Chapman Jerrold L. Ulrey Its: President Its: Vice President-Gas Supply & Rates 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. For 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. For 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. For Other Purchases: For any purchases not covered by a specified pricing method, pricing shall be as negotiated and mutually agreed to in writing 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. For summer refill of company storage, the parties will agree on the extent to which an index average method will be used, after consideration of the operational scheduling needs of company storage. In addition, all other applicable variable costs as identified below shall apply. Appendix E- Commodity Purchases 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 North/East PEPL - Texas, Oklahoma ANR - Louisiana Central/Terre Haute Texas Gas - Zone 1 Texas Gas - Zone SL South Texas Gas - Zone 1 Texas Gas - Zone SL Greensburg TETCO - East Louisiana TETCO - West Louisiana TETCO - East Texas TETCO - South Texas North/East PEPL - Oklahoma ANR - Louisiana-Onshore South Central/Terre Haute Texas Gas SL South Texas Gas SL Greensburg TETCO (ELA) - Louisiana-Onshore South TETCO (WLA) - Louisiana-Onshore South TETCO (ETX) - East Texas - North La. Area TETCO (STX) - South - Corpus Christi APPENDIX E- Commodity Purchases (Continued) System Applicable Monthly Indices North PEPL - Texas, Oklahoma (mainline) South Texas Gas - Zone 1 Texas Gas - Zone 2 Natural Gas Intelligence Gas Price Index Texas Panhandle/Anadarko Basin/Oklahoma System Applicable Daily Indices North/East PEPL - Oklahoma ANR - Louisiana - Onshore South Central/Terre Haute Texas Gas SL - Louisiana - Onshore South Texas Gas (entire Z1) - East Texas - North La. Area South Texas Gas SL - Louisiana - Onshore South Texas Gas (entire Z1) - East Texas - North La. Area Greensburg/Westport TETCO (ELA) - Louisiana - Onshore South TETCO (WLA) - Louisiana - Onshore South TETCO (ETX) - East Texas - North La. Area TETCO (STX) - South - Corpus Christi Trunkline - East - Houston - Katy Trunkline - South - Corpus Christi Trunkline - Louisiana - Onshore South 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. North/East PEPL Contract No. Contract Rate 11713 Sheet No. 11 11714 Sheet No. 5 11715 Sheet No. 5 11716 Sheet No. 5 11717 Sheet No. 5 11719 Tariff Letter 11720 Tariff Letter 11721 Sheet No. 5 12044 Sheet No. 11 12045 Sheet No. 5 APPENDIX E - Commodity Purchases - Other Variable Costs North/East ANR Contract No. Contract Rate X-22 Sheet No. 16 Sheet No. 14 Sheet No. 15 Sheet No. 19 19100 Sheet No. 7 Sheet No. 17 Sheet No. 17A Sheet No. 19 20250 Sheet No. 7 Sheet No. 17 Sheet No. 17A Sheet No. 19 20300 Sheet No. 7 Sheet No. 17 Sheet No. 17A Sheet No. 19 32300 Sheet No. 10 Sheet No. 19 33050 Sheet No. 10 Sheet No. 19 70300 Sheet No. 68G APPENDIX E - Commodity Purchases - Other Variable Costs Central/Terre Haute System Texas Gas G-3 Contract No. Contract Rate N0325 Sheet No. 10 Sheet No. 10 Sheet No. 14 T3780 Sheet No. 11 Sheet No. 11 Sheet No. 14 South System Texas Gas G-4 Contract No. Contract Rate N0420 Sheet No. 10 Sheet No. 10 T3739 Sheet No. 11 Sheet No. 11 APPENDIX E - Commodity Purchases - Other Variable Costs Greensburg System Texas Eastern Contract No. Contract Rate 800171 Sheet No. 36 Sheet No. 126 Sheet No. 127 Sheet No. 128 Sheet No. 129 400109 Sheet No. 43 Sheet No. 126 Sheet No. 127 Sheet No. 128 Sheet No. 129 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 from time to time by mutual agreement of the Parties, which ultimately will be memorialized in a revised Appendix E. PROLIANCE ENERGY, LLC INDIANA GAS COMPANY, INC. By: /s/Carl L. Chapman By: /s/Jerrold L. Ulrey Carl L. Chapman Jerrold L. Ulrey Its: President Its: Vice President-Gas Supply & Rates 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 Buyer's annual costs, to otherwise perform the gas supply function (the "Base Year Amount"). The Base Year Amount shall be $1,354,739. For purposes of this Appendix F, year one shall be the twelve month period beginning April 1, 1996. 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. PROLIANCE ENERGY LLC INDIANA GAS COMPANY, INC. By: /s/Carl L. Chapman By: /s/Jerrold L. Ulrey Carl L. Chapman Jerrold L. Ulrey Its: President Its: Vice President-Gas Supply & Rates APPENDIX G- Notices Invoice Information: Buyer: Seller: Indiana Gas Company, Inc. J. Groth Corporate Accounting Proliance Energy, LLC Attn.: Judy Shular 1630 North Meridian Street 1630 North Meridian Street Indianapolis, IN 46202 Indianapolis, IN 46202 (317) 321-0353 (317) 321-0461 Payments: Buyer: Seller: National City Bank Bank One For the Account of: For the Account of: Indiana Gas Company, Inc. Proliance Energy, LLC Supply Plans/Operational/Force Majeure: Buyer: Seller: Supply Plans Supply Plans Chris Kershner Brian Azman (317) 321-0583 (317) 321-0422 Operational Operational Randy Gary Curt Hribernik (317) 321-0507 (317) 321-0610 Force Majeure Force Majeure Randy Gary (317) 321-0507 Brian Azman - (317) 321-0422 Frank Lindsey (317) 321-0334 Curt Hribernik - (317) 321-0610 Gas Controller on Duty (317) 321-0535 John Talley - (317) 321-0479 Indiana Gas Company, Inc. Proliance Energy, LLC 1630 North Meridian Street 1630 North Meridian Street Indianapolis, IN 46202 Indianapolis, IN 46202 (317) 321-0787 (Telecopy) (317) 921-2760 (Telecopy) All Other Notices: Buyer: Seller: Gas Control Department Proliance Energy , LLC Attn.: Randy Gary Attn: John R. Talley 1630 North Meridian Street 1630 North Meridian Street Indianapolis, IN 46202 Indianapolis, IN 46202 APPENDIX G- Notices (Continued) Amendment Seller and Buyer agree that this Appendix G may be amended from time to time as provided in this Agreement, which amendment ultimately will be memorialized in a revised Appendix G. PROLIANCE ENERGY, LLC INDIANA GAS COMPANY, INC. By: /s/Carl L. Chapman By: /s/Jerrold L. Ulrey Carl L. Chapman Jerrold L. Ulrey Its: President Its: Vice President-Gas Supply & Rates 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 INDIANA GAS COMPANY, INC. By: /s/Carl L. Chapman By: /s/Jerrold L. Ulrey Carl L. Chapman Jerrold L. Ulrey Its: President Its: Vice President-Gas Supply & Rates APPENDIX I- Diversion of Entitlements I. Diversion of Delivered Gas Sales Entitlements From Buyer Seller shall have the right to schedule entitlements of Buyer to Citizens Gas & Coke Utility, provided that: A. Seller shall reimburse Buyer for applicable variable costs Buyer incurs in replacing diverted supply with its own on system gas sources. B. If such diversion causes Buyer to incur gas costs related to on system gas sources, Seller shall reimburse Buyer or otherwise assure Buyer suffers no economic detriment from such incurrence of gas costs. C. The "Shoulder Month Season" shall be the consecutive months of October, November, December, January, February, March and April during the term of this Agreement. Unless otherwise agreed, the maximum diversion quantity shall not exceed 70,000 Dth on any day, nor 1,500,000 Dth for any Shoulder Month Season. D. Seller shall administer Buyer's gas supply portfolio such that any diversion will not endanger Buyer's ability to meet system demands. II. Diversion of Entitlements to Buyer Buyer shall have the right to entitlements from Seller, as follows: A. Delivered Peaking Sales Service ("PSS") 1. Seller shall provide Buyer PSS with the following entitlements: Contract Month Maximum Daily PSS Maximum Annual PSS December 50,000 Dth/day 500,000 Dth during any January 50,000 Dth/day December, January, February 50,000 Dth/day February period 2. Buyer shall pay Seller a demand cost of $2.88 per Dth multiplied by the Maximum Annual PSS and a variable cost of $0.60 for each Dth of PSS nominated for Buyer. Demand costs shall be divided equally among December, January and February invoices. Variable costs shall be invoiced for the month nominated. 3. For PSS nominated for Buyer, Buyer shall pay Seller the Gas Daily index average for Texas Gas Zone SL for the applicable day. APPENDIX I- Diversion of Entitlements B. Delivered Winter Sales Services ("WSS") 1. Seller shall provide Buyer with WSS with the following entitlements: Contract Month Maximum Daily WSS Maximum Annual WSS November 75,000 Dth/day 2,250,000 Dth during December 75,000 Dth/day any winter period. January 75,000 Dth/day February 75,000 Dth/day March 75,000 Dth/day 2. Buyer shall pay Seller as follows: a. For WSS Commodity: The applicable PEPL Gas Daily index average commodity price under this Agreement b. For WSS Variable Costs: $0.30 per Dth utilized. c. For WSS Demand Costs: $3.45 per Dth per year for each Dth of Maximum Annual WSS, billed in equal monthly amounts commencing for April, 1996, and ending for March, 2000. Amendment Seller and Buyer agree that this Appendix I may be amended from time to time by mutual agreement of the Parties, which amendment ultimately will be memorialized in a revised Appendix I. PROLIANCE ENERGY, LLC. INDIANA GAS COMPANY, INC. By: /s/Carl L. Chapman By: /s/Jerrold L. Ulrey Carl L. Chapman Jerrold L. Ulrey Its: President Its: Vice President