Common use of ADDENDUM Clause in Contracts

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Public Service Company of Colorado (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. By: /s/ Xxxxx X. Xxxxxxx Name: Xxxxx X. Xxxxxxx Title: Executive Vice President Dated as of April 21, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Public Service Company of Colorado (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. XXXXXXX STREET COMMITMENT CORPORATION (Recourse only to assets of Xxxxxxx Street Commitment Corporation) By: /s/ Xxxxx X. Xxxxxxx Manda D’Agata Name: Xxxxx X. Xxxxxxx Manda D’Agata Title: Executive Assistant Vice President Dated as of April 2119, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Public Service Company of Colorado Northern States Power Company, a Minnesota corporation (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. KBC BANK N.V. By: /s/ Xxxxx X. Xxxxxxx Xxxx Xxxxxx Name: Xxxxx X. Xxxxxxx Xxxx Xxxxxx Title: Executive Vice President By: /s/ Xxxxxx Xxxxxxxx Name: Xxxxxx Xxxxxxxx Title: First Vice President Dated as of April 2119, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Public Service Company of Colorado (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. Citicorp USA By: /s/ Xxxxxxx Xxxxx X. Xxxxxxx Name: Xxxxxxx Xxxxx X. Xxxxxxx Title: Executive Vice President Dated as of April 2119, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Public Service Company of Colorado Northern States Power Company, a Minnesota corporation (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. BANK OF AMERICA, N.A. By: /s/ Xxxxx Xxxxxxxx X. Xxxxxxx Xxxxxxxxxx Name: Xxxxx Xxxxxxxx X. Xxxxxxx Xxxxxxxxxx Title: Executive Senior Vice President Dated as of April 21, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Southwestern Public Service Company of Colorado (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. KEYBANK NATIONAL ASSOCIATION By: /s/ Xxxxx X. Xxxxxxx Xxxxx Name: Xxxxx X. Xxxxxxx Xxxxx Title: Executive Vice President Dated as of April 21, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Southwestern Public Service Company of Colorado (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. XXXXXXX STREET COMMITMENT CORPORATION (Recourse only to assets of Xxxxxxx Street Commitment Corporation) By: /s/ Xxxxx X. Xxxxxxx Manda D’Agata Name: Xxxxx X. Xxxxxxx Manda D’Agata Title: Executive Assistant Vice President Dated as of April 2119, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Southwestern Public Service Company of Colorado (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. Citibank, N.A. By: /s/ Xxxxxxx Xxxxx X. Xxxxxxx Name: Xxxxxxx Xxxxx X. Xxxxxxx Title: Executive Vice President Dated as of April 2119, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Public Service Company of Colorado (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. The Bank of Tokyo-Mitsubishi, Ltd. By: /s/ Xxxxx Xxxxxxx X. Xxxxxxx Name: Xxxxx Xxxxxxx X. Xxxxxxx Title: Executive Vice President VP & Manager Dated as of April 2120, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Public Service Company of Colorado Northern States Power Company, a Minnesota corporation (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. Xxxxxx Xxxxxxx Bank By: /s/ Xxxxx X. Xxxxxxx Xxxxxx Xxxxxx Name: Xxxxx X. Xxxxxxx Xxxxxx Xxxxxx Title: Executive Vice President Xxxxxx Xxxxxxx Bank Dated as of April 2120, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Public Service Company of Colorado (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. Xxxxxx Xxxxxxx Financing, Inc. By: /s/ Xxxxx Cahal X. Xxxxxxx Name: Xxxxx Cahal X. Xxxxxxx Title: Executive Vice President Dated as of April 21, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Public Service Company of Colorado (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. By: /s/ Xxxxx X. Xxxxxxx Name: Xxxxx X. Xxxxxxx Title: Executive Vice President Dated as of April 21, 2005.

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Public Service Company of Colorado (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. SUMITOMO MITSUI BANKING CORPORATION By: /s/ Xxxxx X. Xxxxxxx Xxxx Name: Xxxxx X. Xxxxxxx Xxxx Title: Executive Senior Vice President Dated as of April 2119, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Public Service Company of Colorado (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. XXXXXXX XXXXX BANK USA By: /s/ Xxxxx X. Xxxxxxx Xxxxx Name: Xxxxx X. Xxxxxxx Xxxxx Title: Executive Vice President Director Dated as of April 21, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Southwestern Public Service Company of Colorado (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. By: /s/ Xxxxx X. Xxxxxxx Name: Xxxxx X. Xxxxxxx Title: Executive Vice President Dated as of April 21, 2005.

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Southwestern Public Service Company of Colorado (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. The Bank of Nova Scotia By: /s/ Xxxxx X. Xxxxxxx Xxxxxx Name: Xxxxx X. Xxxxxxx Xxxxxx Title: Executive Vice President Managing Director Dated as of April 2119, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Public Service Company of Colorado (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo HSBC Bank USA, National Bank. Association By: /s/ Xxxxx X. Xxxxxxx Xxxx Aldeanueva Name: Xxxxx X. Xxxxxxx Xxxx Aldeanueva Title: Executive Vice President Dated as of April 2119, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Public Service Company of Colorado Northern States Power Company, a Minnesota corporation (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. XXXXXX BROTHERS BANK, FSB By: /s/ Xxxxx Xxxx X. Xxxxxxx Xxxxxx Name: Xxxxx Xxxx X. Xxxxxxx Xxxxxx Title: Executive Senior Vice President Dated as of April 21, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Southwestern Public Service Company of Colorado (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo HSBC Bank USA, National Bank. Association By: /s/ Xxxxx X. Xxxxxxx Xxxx Aldeanueva Name: Xxxxx X. Xxxxxxx Xxxx Aldeanueva Title: Executive Vice President Dated as of April 2119, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Southwestern Public Service Company of Colorado (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. SUMITOMO MITSUI BANKING CORPORATION By: /s/ Xxxxx X. Xxxxxxx Xxxx Name: Xxxxx X. Xxxxxxx Xxxx Title: Executive Senior Vice President Dated as of April 2119, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Public Service Company of Colorado (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. BARCLAYS BANK PLC By: /s/ Xxxxx Sydney X. Xxxxxxx Xxxxxx Name: Xxxxx Sydney X. Xxxxxxx Xxxxxx Title: Executive Vice President Director Dated as of April 21, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Public Service Company of Colorado Northern States Power Company, a Minnesota corporation (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. BARCLAYS BANK PLC By: /s/ Xxxxx Sydney X. Xxxxxxx Xxxxxx Name: Xxxxx Sydney X. Xxxxxxx Xxxxxx Title: Executive Vice President Director Dated as of April 21, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Southwestern Public Service Company of Colorado (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. KBC BANK N.V. By: /s/ Xxxxx X. Xxxxxxx Xxxx Xxxxxx Name: Xxxxx X. Xxxxxxx Xxxx Xxxxxx Title: Executive Vice President By: /s/ Xxxxxx Xxxxxxxx Name: Xxxxxx Xxxxxxxx Title: First Vice President Dated as of April 2119, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Public Service Company of Colorado (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. XXXXXX BROTHERS BANK, FSB By: /s/ Xxxxx Xxxx X. Xxxxxxx Xxxxxx Name: Xxxxx Xxxx X. Xxxxxxx Xxxxxx Title: Executive Senior Vice President Dated as of April 21, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Southwestern Public Service Company of Colorado (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. Xxxxxx Xxxxxxx Bank By: /s/ Xxxxx X. Xxxxxxx Xxxxxx Xxxxxx Name: Xxxxx X. Xxxxxxx Xxxxxx Xxxxxx Title: Executive Vice President Dated as of April 2120, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Public Service Company of Colorado (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. The Bank of Nova Scotia By: /s/ Xxxxx X. Xxxxxxx Xxxxxx Name: Xxxxx X. Xxxxxxx Xxxxxx Title: Executive Vice President Managing Director Dated as of April 2119, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Public Service Company of Colorado Northern States Power Company, a Minnesota corporation (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. Xxxxxx Xxxxxxx Financing, Inc. By: /s/ Xxxxx X. Xxxxxxx Name: Xxxxx Cahal X. Xxxxxxx Title: Executive Vice President Dated as of April 21, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Southwestern Public Service Company of Colorado (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. Mizuho Corporate Bank Ltd. By: /s/ Xxxxx X. Xxxx Xxxxxxx Name: Xxxxx X. Xxxx Xxxxxxx Title: Executive Senior Vice President Dated as of April 2120, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Public Service Company of Colorado (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. Xxxxxx Xxxxxxx Bank By: /s/ Xxxxx X. Xxxxxxx Xxxxxx Xxxxxx Name: Xxxxx X. Xxxxxxx Xxxxxx Xxxxxx Title: Executive Vice President Xxxxxx Xxxxxxx Bank Dated as of April 2120, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Public Service Company of Colorado Northern States Power Company, a Minnesota corporation (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. SUMITOMO MITSUI BANKING CORPORATION By: /s/ Xxxxx X. Xxxxxxx Xxxx Name: Xxxxx X. Xxxxxxx Xxxx Title: Executive Senior Vice President Dated as of April 2119, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Public Service Company of Colorado (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. Mizuho Corporate Bank Ltd. By: /s/ Xxxxx X. Xxxx Xxxxxxx Name: Xxxxx X. Xxxx Xxxxxxx Title: Executive Senior Vice President Dated as of April 2120, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Southwestern Public Service Company of Colorado (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. Bank By: /s/ Xxxxx X. Xxxxxxx Name: Xxxxx X. Xxxxxxx Title: Executive Vice President Dated as of April 21, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Public Service Company of Colorado Northern States Power Company, a Minnesota corporation (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. KEYBANK NATIONAL ASSOCIATION By: /s/ Xxxxx X. Xxxxxxx Xxxxx Name: Xxxxx X. Xxxxxxx Xxxxx Title: Executive Vice President Dated as of April 21, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Southwestern Public Service Company of Colorado (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. The Bank of Tokyo-Mitsubishi, Ltd By: /s/ Xxxxx Xxxxxxx X. Xxxxxxx Name: Xxxxx Xxxxxxx X. Xxxxxxx Title: Executive Vice President VP & Manager Dated as of April 2120, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Public Service Company of Colorado Northern States Power Company, a Minnesota corporation (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. XXXXXXX XXXXX BANK USA By: /s/ Xxxxx X. Xxxxxxx Xxxxx Name: Xxxxx X. Xxxxxxx Xxxxx Title: Executive Vice President Director Dated as of April 21, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Public Service Company of Colorado Northern States Power Company, a Minnesota corporation (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. XXXXXXX STREET COMMITMENT CORPORATION (Recourse only to assets of Xxxxxxx Street Commitment Corporation) By: /s/ Xxxxx X. Xxxxxxx Manda D’Agata Name: Xxxxx X. Xxxxxxx Manda D’Agata Title: Executive Assistant Vice President Dated as of April 2119, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Southwestern Public Service Company of Colorado (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. XXXXXX BROTHERS BANK, FSB By: /s/ Xxxxx Xxxx X. Xxxxxxx Xxxxxx Name: Xxxxx Xxxx X. Xxxxxxx Xxxxxx Title: Executive Senior Vice President Dated as of April 21, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Southwestern Public Service Company of Colorado (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. XXXXXXX XXXXX BANK USA By: /s/ Xxxxx X. Xxxxxxx Xxxxx Name: Xxxxx X. Xxxxxxx Xxxxx Title: Executive Vice President Director Dated as of April 21, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Public Service Company of Colorado Northern States Power Company, a Minnesota corporation (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. By: /s/ Xxxxx X. Xxxxxxx Name: Xxxxx X. Xxxxxxx Title: Executive Vice President Dated as of April 21, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Public Service Company of Colorado Northern States Power Company, a Minnesota corporation (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. The Bank of Nova Scotia By: /s/ Xxxxx X. Xxxxxxx Xxxxxx Name: Xxxxx X. Xxxxxxx Xxxxxx Title: Executive Vice President Managing Director Dated as of April 2119, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Southwestern Public Service Company of Colorado (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. BANK OF AMERICA, N.A. By: /s/ Xxxxx Xxxxxxxx X. Xxxxxxx Xxxxxxxxxx Name: Xxxxx Xxxxxxxx X. Xxxxxxx Xxxxxxxxxx Title: Executive Senior Vice President Dated as of April 21, 2005

ADDENDUM. The undersigned Lender (i) agrees to all of the provisions of the Credit Agreement, dated as of April 21, 2005 (the “Credit Agreement”), among Public Service Company of Colorado Northern States Power Company, a Minnesota corporation (the “Borrower”), the Lenders party thereto, the Documentation Agents and Syndication Agents named therein and JPMorgan Chase Bank, N.A., as Administrative Agent, and (ii) becomes a party thereto, as a Lender, with obligations applicable to such Lender thereunder, including, without limitation, the obligation to make extensions of credit to the Borrower in an aggregate principal amount not to exceed the amount of its Revolving Commitment as set forth opposite the undersigned Lender’s name in Schedule 1.1A to the Credit Agreement, as such amount may be changed from time to time as provided in the Credit Agreement. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement. Amarillo National Bank. Mizuho Corporate Bank Ltd. By: /s/ Xxxxx X. Xxxx Xxxxxxx Name: Xxxxx X. Xxxx Xxxxxxx Title: Executive Senior Vice President Dated as of April 2120, 2005