AMENDMENT NO. 1 TO CREDIT AGREEMENT

This AMENDMENT NO. 1 to the Credit Agreement, dated as of February 15, 2013 (this “Amendment”), is entered into among CALPINE CORPORATION, a Delaware corporation (the “Borrower”), the Guarantors and MORGAN STANLEY SENIOR FUNDING, INC., as administrative agent (in such capacity and including any successors in such capacity, the “Administrative Agent”), and amends the Credit Agreement, dated as of October 9, 2012 (as amended to the date hereof and as the same may be further amended, supplemented or otherwise modified from time to time, the “Credit Agreement”) entered into among the Borrower, the institutions from time to time party thereto as Lenders (the “Lenders”), the Administrative Agent and Goldman Sachs Credit Partners L.P., as collateral agent. Capitalized terms used herein and not otherwise defined herein shall have the meanings ascribed to them in the Credit Agreement.

WHEREAS, the Borrower has requested that the Lenders amend the Credit Agreement to effect the changes described below;

NOW, THEREFORE, in consideration of the premises and for other good and valuable consideration (the receipt and sufficiency of which is hereby acknowledged), the parties hereto hereby agree as follows:

The Credit Agreement is, effective as of the Amendment No. 1 Effective Date, hereby amended to:

(a)     delete the references to “2.25%” and “3.25%” in the definition of “Applicable Margin” set forth in Section 1.1 of the Credit Agreement and replace such references with “2.00%” and “3.00%”, respectively;

(b)     delete the reference to “1.25%” in the definition of “Eurodollar Rate” set forth in Section 1.1 of the Credit Agreement and replace it with “1.00%”; and

(c)     delete the reference to “prior to October 9, 2013” in Section 2.13(b) of the Credit Agreement and replace such reference with “after the Amendment No. 1 Effective Date and prior to the first anniversary of the Amendment No. 1 Effective Date”.

This Amendment shall become effective as of the date first written above when, and only when, each of the following conditions precedent shall have been satisfied or waived (the “Amendment No. 1 Effective Date”) by the Administrative Agent:

(a)     Executed Counterparts. The Administrative Agent shall have received this Amendment, duly executed by the Borrower, the Guarantors and the Administrative Agent,

(b)     Executed Consents. The Administrative Agent shall have received a consent (“Consent”) in the form of Exhibit A to this Amendment, duly executed by the Required Lenders and each Lender (including each replacement financial institution that becomes a Lender pursuant to Section 2.26 of the Credit Agreement) by 5:00 p.m., New York City time on February 8, 2013 (the “Consent Deadline”) unless such Consent Deadline is extended by the Administrative Agent;

(c)     No Default or Event of Default. After giving effect to this Amendment, no Default or Event of Default shall have occurred and be continuing, either on the date hereof or on the Amendment No. 1 Effective Date;

(d)     Representations and Warranties. The representations and warranties of the Borrower contained in Article 3 of the Credit Agreement and Section 3 of this Amendment or any other Loan Document shall be true and correct in all material respects (and in all respects if qualified by materiality) on and as of the Amendment No. 1 Effective Date, as if made on and as of such date and except to the extent that such representations and warranties specifically relate to a specific date, in which case such representations and warranties shall be true and correct in all material respects as of such specific date; provided, however, that references therein to the “Credit Agreement” shall be deemed to refer to the Credit Agreement as amended hereby and after giving effect to the consents and waivers set forth herein;

(e)     Officer’s Certificate. The Borrower shall have provided a certificate signed by a Responsible Officer of the Borrower certifying as to the satisfaction of the conditions set forth in paragraphs (c) and (d) of this Section 2; and

(f)     Fees and Expenses Paid. The Borrower shall have paid (i) all reasonable and documented out-of-pocket costs and expenses of the Administrative Agent in connection with the preparation, reproduction, execution and delivery of this Amendment (including, without limitation, the reasonable and documented fees and out-of- pocket expenses of counsel for the Administrative Agent with respect thereto) and all other fees then due and payable to the Administrative Agent in connection with this Amendment and (ii) for the ratable account of each Lender, a payment equal to 1% of the aggregate principal amount of the Term Loans outstanding immediately prior to the Amendment No. 1 Effective Date, whether or not such Lender consents to this Amendment (and such fee shall satisfy in full the Borrower’s obligations under Section 2.13(b) of the Credit Agreement);

On and as of the Amendment No. 1 Effective Date, after giving effect to this Amendment, the Borrower hereby represents and warrants to the Administrative Agent and each Lender as follows:

(a)     this Amendment has been duly authorized, executed and delivered by the Borrower and constitutes the legal, valid and binding obligations of the Borrower enforceable against the Borrower in accordance with its terms and the Credit Agreement as amended by this Amendment and constitutes the legal, valid and binding obligation of the Borrower enforceable against the Borrower in accordance with its terms, except as may be limited by applicable bankruptcy, insolvency, fraudulent transfer, reorganization, moratorium or similar laws of general applicability relating to or limiting creditors’ rights generally and subject to general principles of equity, regardless of whether considered in a proceeding in equity or at law;

(b)     each of the representations and warranties contained in Section 3 (Representations and Warranties) of the Credit Agreement and each other Loan Document is true and correct in all material respects (and in all respects if qualified by materiality) on and as of the Amendment No. 1 Effective Date, as if made on and as of such date and except to the extent that such representations and warranties specifically relate to a specific date, in which case such representations and warranties shall be true and correct in all material respects as of such specific date; provided, however, that references therein to the “Credit Agreement” shall be deemed to refer to the Credit Agreement as amended hereby and after giving effect to the consents and waivers set forth herein; and

(c)     no Default or Event of Default has occurred and is continuing.

Section 4.     Post-Closing Requirements. Within 60 days after the Amendment No. 1 Effective Date (or such later date as the Administrative Agent may agree in its sole discretion), the Borrower shall, or shall cause the applicable Guarantor to, enter into an amendment to the mortgage encumbering the Mortgaged Property located in the state of Illinois, in form reasonably acceptable to the Administrative Agent, together with an opinion of counsel with respect thereto and date-down or modification endorsement to the title policy insuring such mortgage

Section 5.     New Lenders and Non-Consenting Lenders If any Lender under the Credit Agreement declines or fails to consent to this Amendment by failing to return an executed Consent to the Administrative Agent prior to the Consent Deadline or elects to assign a portion of its Term Loans as provided in its executed Consent, then pursuant to and in compliance with the terms of Section 2.26 of the Credit Agreement, such Lender may be replaced and its commitments and/or obligations (or a portion thereof) purchased and assumed by either a new lender (a “New Lender”) or an existing Lender which is willing to increase its Term Loans as set forth on their executed Consent. For the avoidance of doubt, if a Lender declines or fails to consent to this Amendment it will be deemed to be the execution of an Assignment and Assumption Agreement (“Assignment Agreement”)).

The Borrower agrees to pay in accordance with the terms of Section 9.5 (Payment of Expenses and Taxes) of the Credit Agreement all reasonable out-of-pocket costs and expenses of the Administrative Agent in connection with the preparation, reproduction, execution and de-

livery of this Amendment (including, without limitation, the reasonable and documented fees and out-of-pocket expenses of counsel for the Administrative Agent with respect thereto).

(a)     As of the Amendment No. 1 Effective Date, each reference in the Credit Agreement to “this Agreement,” “hereunder,” “hereof,” “herein,” or words of like import, and each reference in the other Loan Documents to the Credit Agreement (including, without limitation, by means of words like “thereunder”, “thereof” and words of like import), shall mean and be a reference to the Credit Agreement as amended hereby, and this Amendment and the Credit Agreement shall be read together and construed as a single instrument. Each of the table of contents and lists of Exhibits and Schedules of the Credit Agreement shall be amended to reflect the changes made in this Amendment as of the Amendment No. 1 Effective Date.

(b)     Except as expressly amended hereby or specifically waived above, all of the terms and provisions of the Credit Agreement and all other Loan Documents are and shall remain in full force and effect and are hereby ratified and confirmed.

(c)     The execution, delivery and effectiveness of this Amendment shall not, except as expressly provided herein, operate as a waiver of any right, power or remedy of the Lenders, the Borrower, Lead Arranger or the Administrative Agent under any of the Loan Documents, nor constitute a waiver or amendment of any other provision of any of the Loan Documents or for any purpose except as expressly set forth herein.

(d)     This Amendment is a Loan Document.

Each Loan Party hereby expressly acknowledges the terms of this Amendment and reaffirms, as of the date hereof, (i) the covenants and agreements contained in each Loan Document to which it is a party, including, in each case, such covenants and agreements as in effect immediately after giving effect to this Amendment and the transactions contemplated hereby and (ii) its guarantee of the Obligations under the Guarantee and Collateral Agreement, as applicable, and its grant of Liens on the Collateral to secure the Obligations pursuant to the Secu-rity Documents.

This Amendment may be executed in any number of counterparts and by different parties in separate counterparts, each of which when so executed shall be deemed to be an origi-nal and all of which taken together shall constitute one and the same agreement. Signature pages may be detached from multiple separate counterparts and attached to a single counterpart so that all signature pages are attached to the same document. Delivery of an executed counterpart by telecopy shall be effective as delivery of a manually executed counterpart of this Amendment.

THIS AGREEMENT AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES UNDER THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED AND INTERPRETED IN ACCORDANCE WITH, THE LAW OF THE STATE OF NEW YORK.

The section titles contained in this Amendment are and shall be without substan-tive meaning or content of any kind whatsoever and are not a part of the agreement between the parties hereto, except when used to reference a section. Any reference to the number of a clause, sub-clause or subsection of any Loan Document immediately followed by a reference in paren-thesis to the title of the section of such Loan Document containing such clause, sub-clause or subsection is a reference to such clause, sub-clause or subsection and not to the entire section; provided, however, that, in case of direct conflict between the reference to the title and the refer-ence to the number of such section, the reference to the title shall govern absent manifest error. If any reference to the number of a section (but not to any clause, sub-clause or subsection thereof) of any Loan Document is followed immediately by a reference in parenthesis to the title of a section of any Loan Document, the title reference shall govern in case of direct conflict absent manifest error.

All communications and notices hereunder shall be given as provided in the Credit Agreement.

The fact that any term or provision of this Agreement is held invalid, illegal or unenforceable as to any person in any situation in any jurisdiction shall not affect the validity, enforceability or legality of the remaining terms or provisions hereof or the validity, enforceability or legality of such offending term or provision in any other situation or jurisdiction or as applied to any person.

The terms of this Amendment shall be binding upon, and shall inure to the benefit of, the parties hereto and their respective successors and assigns.

The jurisdiction and waiver of right to trial by jury provisions in Section 9.12 of the Credit Agreement are incorporated herein by reference mutatis mutandis.

IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be executed by their respective officers and general partners thereunto duly authorized, as of the date first written above.

IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be executed by their respective officers and general partners thereunto duly authorized, as of the date first written above.

Anacapa Land Company, LLC

Anderson Springs Energy Company

Auburndale Peaker Energy Center, LLC

Aviation Funding Corp.

Baytown Energy Center, LLC

Bellingham Cogen, Inc.

CalGen Expansion Company, LLC

CalGen Finance Corp.

CalGen Project Equipment Finance Company Three, LLC

Calpine Administrative Services Company, Inc.

Calpine Auburndale Holdings, LLC

Calpine Bethlehem, LLC

Calpine c*Power, Inc.

Calpine CalGen Holdings, Inc.

Calpine California Holdings, Inc.

Calpine Calistoga Holdings, LLC

Calpine CCFC Holdings, Inc.

Calpine Central Texas GP, Inc.

Calpine Central, Inc.

Calpine Central-Texas, Inc.

Calpine Cogeneration Corporation

Calpine Eastern Corporation

Calpine Edinburg, Inc.

Calpine Energy Services GP, LLC

Calpine Energy Services LP, LLC

Calpine Energy Services, L.P.

Calpine Fuels Corporation

Calpine Generating Company, LLC

Calpine Geysers Company, L.P.

Calpine Gilroy 1, Inc.

Calpine Gilroy 2, Inc.

Calpine Global Services Company, Inc.

Calpine Hidalgo Energy Center, L.P.

Calpine Hidalgo Holdings, Inc.

Calpine Hidalgo, Inc.

Calpine Jupiter, LLC

Calpine Kennedy Operators, Inc.

Calpine KIA, Inc.

Calpine King City, Inc.

Calpine King City, LLC

Calpine Leasing Inc.

Calpine Long Island, Inc.

Calpine Magic Valley Pipeline, Inc.

Calpine Mid-Atlantic Energy, LLC

Calpine Mid-Atlantic Generation, LLC

Calpine Mid-Atlantic Marketing, LLC

Calpine MVP, Inc.

Calpine Newark, LLC

Calpine New Jersey Generation, LLC

Calpine Northbrook Holdings Corporation

Calpine Northbrook Investors, LLC

Calpine Northbrook Project Holdings, LLC

Calpine Oneta Power, LLC

Calpine Operations Management Company, Inc.

Calpine Power Company

Calpine Power, Inc.

Calpine Power Management, LLC

Calpine PowerAmerica, LLC

Calpine PowerAmerica-CA, LLC

Calpine PowerAmerica-ME, LLC

Calpine Project Holdings, Inc.

Calpine Pryor, Inc.

Calpine Rumford I, Inc.

Calpine Rumford, Inc.

Calpine Schuylkill, Inc.

Calpine Solar, LLC

Calpine Sonoran Pipeline, LLC

Calpine Stony Brook Operators, Inc.

Calpine Stony Brook, Inc.

Calpine Sumas, Inc.

Calpine TCCL Holdings, Inc.

Calpine Texas Pipeline GP, Inc.

Calpine Texas Pipeline LP, Inc.

Calpine Texas Pipeline, L.P.

Calpine Tiverton I, Inc.

Calpine Tiverton, Inc.

Calpine University Power, Inc.

Calpine Vineland Solar, LLC

Carville Energy LLC

CES Marketing IX, LLC

CES Marketing V, LLC

CES Marketing X, LLC

Channel Energy Center, LLC

Clear Lake Cogeneration Limited Partnership

Columbia Energy LLC

Corpus Christi Cogeneration, LLC

CPN 3^rd Turbine, Inc.

CPN Acadia, Inc.

CPN Cascade, Inc.

CPN Clear Lake, Inc.

CPN East Fuels, LLC

CPN Pipeline Company

CPN Pryor Funding Corporation

CPN Telephone Flat, Inc.

Decatur Energy Center, LLC

Delta Energy Center, LLC

Fontana Energy Center, LLC

Freestone Power Generation, LLC

GEC Bethpage Inc.

Geysers Power Company, LLC

Geysers Power I Company

Hillabee Energy Center, LLC

Idlewild Fuel Management Corp.

JMC Bethpage, Inc.

Los Medanos Energy Center LLC

Magic Valley Pipeline, L.P.

Mobile Energy LLC

Modoc Power, Inc.

Morgan Energy Center, LLC

New Development Holdings, LLC

Northwest Cogeneration, Inc.

NTC Five, Inc.

Pastoria Energy Center, LLC

Pastoria Energy Facility, L.L.C.

Pine Bluff Energy, LLC

RockGen Energy LLC

Rumford Power Associates Limited Partnership

Santa Rosa Energy Center, LLC

South Point Energy Center, LLC

South Point Holdings, LLC

Stony Brook Cogeneration, Inc.

Stony Brook Fuel Management Corp.

Sutter Dryers, Inc.

Texas City Cogeneration, LLC

Texas Cogeneration Five, Inc.

Texas Cogeneration One Company

Thermal Power Company

Tiverton Power Associates Limited Partnership

Zion Energy LLC

Deer Park Energy Center LLC

Deer Park Holdings, LLC

Metcalf Energy Center, LLC

Metcalf Holdings, LLC

Calpine Construction Management Company, Inc.

Calpine Mid-Atlantic Operating, LLC

Calpine Power Services, Inc.

Thomassen Turbine Systems America, Inc.

Calpine Operating Services Company, Inc.

South Point OL-1, LLC

South Point OL-2, LLC

South Point OL-3, LLC

South Point OL-4, LLC

CONSENT TO AMENDMENT NO. 1 (this “Consent”) to Amendment No. 1 (“Amendment”) to the Credit Agreement, dated as of [March 9, 2011] [June 17, 2011] [October 9, 2012]¹ (as amended to the date hereof and as the same may be further amended, supplemented or otherwise modified from time to time, the “Credit Agreement”) entered into among the Borrower, the institutions from time to time party thereto as Lenders (the “Lenders”), the Administrative Agent and Goldman Sachs Credit Partners L.P., as collateral agent. Unless otherwise defined herein, terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Amendment.

Date of Credit Agreement:     ¨ March 2011         ¨ June 2011         ¨October 2012

Fill in existing position (if any): $_____________________

Check the first or second box below; you may also, at your option, check the third or fourth box

The undersigned Lender would like to recommit $___________________ or allocate such amount to ____________________, an affiliate of such Lender and is hereby deemed to execute the Assignment Agreement.