1 Exhibit 10.11 ASSIGNMENT AND ASSUMPTION AGREEMENT (COLSTRIP 3&4 AGREEMENTS) THIS ASSIGNMENT AND ASSUMPTION AGREEMENT (COLSTRIP 3&4 AGREEMENTS) (this "Assignment Agreement") is made and entered into as of the 17th day of December, 1999, by and between THE MONTANA POWER COMPANY, a Montana corporation, ("MPC"), and PP&L MONTANA, LLC, a Delaware limited liability company ("PP&L Montana"). RECITALS A. MPC, Puget Sound Power & Light Company (now Puget Sound Energy, Inc.) ("Puget"), Portland General Electric Company ("Portland"), The Washington Water Power Company (now Avista Corp.) ("Avista") and Pacific Power & Light Company (now PacifiCorp)("PacifiCorp") are parties to that certain Ownership and Operation Agreement Colstrip Units #3 and #4 made as of May 6, 1981, as amended October 11, 1991 and July 13, 1998 ("Colstrip 3&4 Ownership Agreement") (capitalized terms used in this Assignment Agreement without definition having the respective meanings specified in the Colstrip 3&4 Ownership Agreement). B. MPC, Puget, Portland, Avista, PacifiCorp and Western Energy Company are parties to that certain Amended and Restated Coal Supply Agreement dated August 24, 1998 ("Colstrip 3&4 CSA"). C. MPC, Puget, Portland, Avista, PacifiCorp and Western Energy Company are parties to that certain coal transportation agreement dated July 10, 1981, as amended September 14, 1987, and August 24, 1998 ("Colstrip 3&4 CTA"). D. MPC, Puget, Portland, Avista, PacifiCorp and United States Trust Company of New York are parties to that certain Agreement Regarding Clean Air Act Compliance Colstrip Units 3&4, dated November 1, 1994, as amended March 20, 1996 ("Colstrip 3&4 CAA Compliance Agreement"). E. MPC, Puget, Portland, Avista and PacifiCorp are parties to that certain Common Facilities Agreement, Colstrip Units #1, #2, #3, and #4, dated May 6, 1981 as amended January 21, 1992 ("Common Facilities Agreement"). F. The Colstrip 3&4 Ownership Agreement, Colstrip 3&4 CSA, Colstrip 3&4 CTA, Colstrip 3&4 CAA Compliance Agreement, and the Common Facilities Agreement (but only insofar as such agreement relates to the portion of the Common Facilities thereunder allocated to Colstrip Units #3 and #4 as part of the Project) are collectively referred to herein as the "Assigned Agreements". G. MPC and PP&L Global, Inc., a Pennsylvania corporation ("PP&L Global"), entered into that certain Asset Purchase Agreement dated as of October 31, 1998, as amended June 29, 1999, and October 29, 1999 (as amended, the "Asset Purchase Agreement"), pursuant to A&A Agmt (Colstrip 3&4) Execution Copy 2 which MPC has agreed to sell to PP&L Global, and PP&L Global has agreed to purchase from MPC, on the terms and subject to the conditions of the Asset Purchase Agreement, MPC's interest in certain electric generation related assets, including MPC's Colstrip 3-related interest in the Assigned Agreements (which interests include a Project Share of 15% and ownership of a 30% undivided interest in Unit 3, a 15% undivided interest in facilities common to both Unit 3 and Unit 4 (only), and a 15% undivided interest in the Common Facilities). H. The Asset Purchase Agreement provides that PP&L Global may assign its interests in the Asset Purchase Agreement to subsidiaries, and PP&L Global has formed PP&L Montana, an indirect wholly-owned subsidiary of PP&L Global, for the purpose of assigning to PP&L Montana certain of PP&L Global's interests in the Asset Purchase Agreement, including, without limitation, MPC's Colstrip 3-related interests in the Assigned Agreements. I. This Assignment Agreement shall not serve to assign (i) MPC's Colstrip 4-related interests in the Assigned Agreements, (ii) MPC's interest as Operator (as defined in the Colstrip 3&4 Ownership Agreement) under the Colstrip 3&4 Ownership Agreement; or (iii) MPC's interest as Common Facilities Operator (as defined in the Common Facilities Agreement) under the Common Facilities Agreement. J. Pursuant to this Assignment Agreement, subject nevertheless to the Asset Purchase Agreement, PP&L Montana desires to assume and accept from MPC, and MPC desires to sell, assign and transfer to PP&L Montana, all of MPC's rights, title, interests, obligations and liabilities in, to and under the Assigned Agreements which correspond to MPC's Colstrip 3-related interests in such agreements that arise and are attributable to the period after the Closing under the Asset Purchase Agreement (as used herein "Closing" has the meaning set forth in the Asset Purchase Agreement); provided, however, that the parties recognize and agree there are certain pre-Closing liabilities being assumed by PP&L Montana as provided in the Asset Purchase Agreement. K. All conditions required for assignment of the Assigned Agreements have been satisfied, including, without limitation, the waivers by Puget, Portland, Avista and PacifiCorp, of the respective "rights of first refusal" set forth in such Assigned Agreements. L. MPC entered into a sale-leaseback transaction completed in 1985 between MPC and other parties, whereby MPC sold its interest in Colstrip Unit #4 and leased back such interest, pursuant to the agreements listed under subparts III.A and III.B on the list of Colstrip Contracts attached to the Asset Purchase Agreement as Disclosure Schedule 1.01(a)(xi) (the "Unit 4 Sale and Leaseback Transaction Documents"), and the assignment of MPC's Colstrip 3-related interests in the Assigned Agreements will be subject to the Unit 4 Sale and Leaseback Transaction Documents insofar as such documents apply to interests in both Unit 3 and Unit 4. NOW, THEREFORE, in consideration of the mutual covenants and agreements set forth herein, and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto hereby agree as follows: -2- A&A Agmt (Colstrip 3&4) Execution Copy 3 AGREEMENT SECTION 1. EFFECTIVE DATE This Assignment Agreement shall become effective upon the execution and delivery of this Assignment Agreement by both parties at the Closing (the "Effective Date"). SECTION 2. ASSIGNMENT AND ASSUMPTION (a) As of the Effective Date, MPC hereby transfers, assigns and delegates to PP&L Montana, and PP&L Montana hereby accepts and assumes from MPC, subject to the terms and provisions of this Assignment Agreement, the Asset Purchase Agreement, and the applicable terms and provisions of the Unit 4 Sale and Leaseback Transaction Documents (but only insofar as such documents apply to interests in both Unit 3 and Unit 4), all of MPC's rights, title, interests, obligations and liabilities in, to and under the Assigned Agreements (including, but without limitation, a Project Share of 15%) which correspond to MPC's Colstrip 3-related interests under such agreements that arise and are attributable to the period after the Effective Date; provided that for purposes of clarification, (a) PP&L Montana shall not assume any obligations or liabilities of MPC under the Assigned Agreements that arise or are attributable to the period on and prior to the Effective Date, and (b) MPC shall remain liable only for such obligations and liabilities of MPC under the Assigned Agreements that arise or are attributable to the period on and prior to the Effective Date. Notwithstanding the foregoing, the parties recognize and agree there are certain pre-Closing liabilities being assumed by PP&L Montana as provided in the Asset Purchase Agreement. (b) This Assignment Agreement shall not operate to assign (i) MPC's Colstrip 4-related interests in the Assigned Agreements, (ii) MPC's interest as Operator (as defined in the Colstrip 3&4 Ownership Agreement) under the Colstrip 3&4 Ownership Agreement; or (iii) MPC's interest as Common Facilities Operator (as defined in the Common Facilities Agreement) under the Common Facilities Agreement. (c) This Assignment Agreement is delivered pursuant to and is subject to the Asset Purchase Agreement, and shall not be construed to add to or subtract from the parties' respective rights and responsibilities under the Asset Purchase Agreement. In the event of any conflict between the terms of the Asset Purchase Agreement and the terms of this Assignment Agreement, the terms of the Asset Purchase Agreement shall prevail. SECTION 3. MISCELLANEOUS (a) Headings to the sections of this Assignment Agreement are solely for the convenience of the parties, are not part of this Assignment Agreement, and shall not be used for the interpretation of, or determination of the validity of, this Assignment Agreement or any of its provisions. -3- A&A Agmt (Colstrip 3&4) Execution Copy 4 (b) No Person (as defined in the Asset Purchase Agreement) other than the parties to this Assignment Agreement, or such parties' successors and assigns, shall have any rights under this Assignment Agreement or the provisions contained herein. (c) This Assignment Agreement may be executed in any number of counterparts, each of which will be deemed an original, but all of which together will constitute one and the same instrument. (d) This Assignment Agreement is binding upon, inures to the benefit of, and is enforceable by the parties hereto and their respective successors and assigns. Neither this Assignment Agreement nor any right, interest or obligation hereunder may be assigned by any party hereto without the prior written consent of the other party hereto, and any attempt to do so shall be void. (e) This Assignment Agreement shall be governed by and construed in accordance with the laws of the State of New York applicable to contracts executed and performed in such State without giving effect to the conflicts of laws principles thereof, except that if it is necessary in any other jurisdiction to have the law of such other jurisdiction govern this Assignment Agreement in order for this Assignment Agreement to be effective in any respect, then the law of such other jurisdiction shall govern this Assignment Agreement to such extent. -4- A&A Agmt (Colstrip 3&4) Execution Copy 5 IN WITNESS WHEREOF, the parties have caused this Assignment and Assumption Agreement (Colstrip 3&4 Agreements) to be executed as of the date first above written. PP&L Montana, LLC By: /s/ Roger Petersen --------------------------------------- Signature Roger Petersen --------------------------------------- Printed Name President --------------------------------------- Title 12/17/99 --------------------------------------- Date THE MONTANA POWER COMPANY By: /s/ Perry J. Cole --------------------------------------- Signature Perry J. Cole --------------------------------------- Printed Name Vice-President --------------------------------------- Title 12/17/99 --------------------------------------- Date -5- A&A Agmt (Colstrip 3&4) Execution Copy