EXHIBIT 10.106 WILLIAMS GAS PIPELINE Texas Gas L0007384 P.O. Box 20008 N0415 3800 Frederica Street Owensboro, KY 42304 270-926-8686 September 15, 1999 Louisville Gas and Electric Company 820 West Broadway Louisville, Kentucky 40202 Attention: Mr. J. Clay Murphy Gentlemen: Reference is made to the Transportation Agreement (Agreement) dated November 1, 1993, as amended, between Texas Gas Transmission Corporation (Texas Gas) and Louisville Gas and Electric Company (LG&E) providing for the transportation of natural gas by Texas Gas for LG&E. Accordingly, Texas Gas and LG&E hereby desire to amend the Agreement between them as follows: A. ARTICLE II, QUANTITY, Section 2.5, for the two-year Agreement with an original primary term through October 31, 1995, shall be deleted in its entirety and replaced with the following Section 2.5: 2.5 The maximum seasonal quantities of gas which Texas Gas shall be obligated to transport and deliver to Customer, and which Customer shall be obligated to receive, are Customer's Seasonal Quantity Entitlements as set forth below: Seasonal Quantity Entitlement MMBtu -------------------- ----- Winter 7,500,000 Summer 1,900,000 B. ARTICLE II, QUANTITY, Section 2.5, for the five-year Agreement with an original primary term through October 31, 1998, shall be deleted in its entirety and replaced with the following Section 2.5: 2.5 The maximum seasonal quantities of gas which Texas Gas shall be obligated to transport and deliver to Customer, and which Customer shall be obligated to receive, are Customer's Seasonal Quantity Entitlements as set forth below: Seasonal Quantity Entitlement MMBtu -------------------- ----- Winter 7,500,000 Summer 1,900,000 Louisville Gas and Electric Company September 15, 1999 Page 2 C. ARTICLE II, QUANTITY, Section 2.5, for the five-year Agreement with an original primary term through October 31, 2001, shall be deleted in its entirety and replaced with the following Section 2.5: 2.5 The maximum seasonal quantities of gas which Texas Gas shall be obligated to transport and deliver to Customer, and which Customer shall be obligated to receive, are Customer's Seasonal Quantity Entitlements as set forth below: Seasonal Quantity Entitlement MMBtu -------------------- ----- Winter 7,500,000 Summer 1,900,000 This amendment shall become effective November 1, 2000, and shall remain in force for a term to coincide with the term of the Agreement. The operation of the provisions of this amendment shall be subject to all applicable governmental statutes and all applicable and lawful orders, rules and regulations. Except as herein amended, the Agreement between the parties hereto shall remain in full force and effect. If the foregoing is in accordance with your understanding of our Agreement, please execute both copies and return to us. We will, in turn, execute them and return one copy for your records. Very truly yours, LOUISVILLE GAS AND ELECTRIC COMPANY TEXAS GAS TRANSMISSION CORPORATION By: /signed/ By: /signed/ ------------------------------- ------------------------------ Title: /title/ Title: /title/ ------------------------------- ------------------------------ AGREED TO AND ACCEPTED this __21st__ day of ____September_______, 1999.