Document:

<PAGE>

                                                                EXHIBIT 10.1.2.9

                                     WAIVER

         This WAIVER, dated as of March 5, 2004 (this "Waiver"), to the Amended
and Restated Credit Agreement, dated as of July 16, 2003 (as the same may be
amended, supplemented or otherwise modified from time to time, the "Credit
Agreement"), among CALPINE CORPORATION, a Delaware corporation (together with
its successors, the "Borrower"), the various financial institutions as are or
may become parties hereto (collectively, the "Lenders"), various lead Arrangers
(as defined below), and THE BANK OF NOVA SCOTIA ("Scotia Capital"), as
administrative agent and funding agent (in such capacity, the "Agent").

                              W I T N E S S E T H:

         WHEREAS, the Borrower, the Lenders and the Agent have heretofore
entered into the Credit Agreement; and

         WHEREAS, the Borrower has requested that the Agent and the Lenders
agree to waive any failure by the Borrower to comply with certain provisions of
the Credit Agreement, upon the terms and subject to the conditions set forth
herein;

         NOW, THEREFORE, in consideration of the premises and the mutual
agreements herein contained and for other good and valuable consideration, the
receipt of which is hereby acknowledged, the Borrower, the Lenders and the Agent
hereby agree as follows:

         SECTION 1. Defined Terms. Unless otherwise defined herein, capitalized
terms used herein shall have the meanings set forth in the Credit Agreement,
other than the terms "Brazos Acquisition" and "Lost Pines Proceeds", which shall
have the meanings set forth in the letter from the Borrower attached hereto as
Exhibit A (the "Lost Pines/Brazos Waiver Request Letter").

         SECTION 2. Waiver of Section 3.1.1 (Payment Terms). The Agent and the
Supermajority Lenders hereby waive any violation of Section 3.1.1(c)(ii) of the
Credit Agreement occurring as a result of the application by CCFCI of the Lost
Pines Proceeds to the Brazos Acquisition rather than to the prepayment of the
outstanding Term B Loans and the reduction of the Revolving Loan Commitments.

         SECTION 3. Effectiveness. This Waiver shall become effective upon
fulfillment of the following conditions precedent: (a) the Borrower and each
Guarantor shall have delivered to the Agent a duly executed copy of this Waiver;
(b) the Agent shall have received duly executed copies of this Waiver from the
Supermajority Lenders; (c) the Agent shall have received such other documents as
the Agent shall have reasonably requested; and (d) no Default or Event of
Default shall have occurred and be continuing on the date hereof after giving
effect to this Waiver.

         SECTION 4. Representations and Warranties. The Borrower hereby
represents and warrants that the representations and warranties contained in the
Credit Agreement and the statements set forth in Section A (Background) of the
Lost Pines/Brazos Waiver Request Letter will be, after giving effect to this
Waiver, true and correct in all material respects, as if made on

<PAGE>

and as of the date hereof, except for representations and warranties which speak
as of a certain date, which representations and warranties shall be true and
correct in all material respect as of such date.

         SECTION 5. Continuing Effect of Credit Agreement. This Waiver shall not
constitute an amendment or waiver of any other provision of the Credit Agreement
or the Loan Documents not expressly referred to herein and shall not be
construed as a waiver or consent to any further or future action on the part of
the Borrower that would require a waiver or consent of the Agent and/or the
Lenders. Except as expressly waived hereby, the provisions of the Credit
Agreement and the Loan Documents are and shall remain in full force and effect.

         SECTION 6. Counterparts. This Waiver may be executed in counterparts
and all of the said counterparts taken together shall be deemed to constitute
one and the same instrument. Delivery of an executed signature page of this
Waiver by facsimile transmission shall be effective as delivery of a manually
executed counterpart hereof.

         SECTION 7. Governing Law. THIS WAIVER SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE INTERNAL LAWS OF THE STATE OF NEW YORK.

         SECTION 8. Expenses. The Borrower agrees to pay or reimburse the Agent
for all of its out-of-pocket costs and expenses incurred in connection with the
preparation, negotiation and execution of this Waiver, including the fees and
disbursements of counsel to the Agent.

<PAGE>

         IN WITNESS WHEREOF, the parties hereto have caused this Waiver to be
duly executed by their respective officers thereunto duly authorized as of the
day and year first above written.

                                            CALPINE CORPORATION

                                            By: /s/ MICHAEL THOMAS
                                                --------------------------------
                                                Name: Michael Thomas
                                                Title: SVP & Corporate Treasurer

The undersigned Guarantors hereby agree that their Guarantee as set forth in the
Security Agreement remains in full force and effect notwithstanding any
provision of this Waiver:

QUINTANA MINERALS (USA), INC.

By: /s/ MICHAEL THOMAS
    ------------------------------
Name: Michael Thomas
Title: SVP

JOQ CANADA, INC.

By: /s/ MICHAEL THOMAS
    ------------------------------
Name: Michael Thomas
Title: SVP

QUINTANA CANADA HOLDINGS, LLC

By: /s/ MICHAEL THOMAS
    ------------------------------
Name: Michael Thomas
Title: SVP

<PAGE>

                                            THE BANK OF NOVA SCOTIA,
                                            as Agent

                                            By: /s/ FRANK. F. SANDLER
                                                --------------------------------
                                                Name: Frank F. Sandler
                                                Title: Managing Director

<PAGE>

                                            CREDIT LYONNAISE NEW YORK BRANCH

                                            By: /s/ MARTIN C. LIVINGSTON
                                                --------------------------------
                                                Name: Martin C. Livingston
                                                Title: Vice President

<PAGE>

                                            UNION BANK OF CALIFORNIA, N.A.

                                            By: /s/ KAREN ELLIOTT
                                                --------------------------------
                                                Name: Karen Elliott
                                                Title: Assistant Vice President

<PAGE>

                                            TORONTO DOMINION (TEXAS), INC.

                                            By: /s/ LYNN CHASIN
                                                --------------------------------
                                                Name: Lynn Chasin
                                               Title: Vice President

<PAGE>

                                            ING CAPITAL LLC

                                            By: /s/ ERWIN THOMET
                                                --------------------------------
                                                Name: Erwin Thomet
                                                Title: Managing Director

                                            By: /s/ CHARLES M. O'NEIL
                                                --------------------------------
                                                Name: Charles M. O'Neil
                                                Title: Managing Director

<PAGE>

                                            BAYERISCHE LANDESBANK, CAYMAN
                                            ISLANDS BRANCH

                                            By: /s/ CORNELIA WINTERGERST
                                                --------------------------------
                                                Name: Cornelia Wintergerst
                                                Title: Vice President

<PAGE>

                                            SEABOARD CLO 2000 LTD.
                                            By: David L. Babson & Company Inc.
                                            as Collateral Manager

                                            By: /s/ JOHN W. STELWAGON, CFA
                                                --------------------------------
                                                Name: John W. Stelwagon, CFA
                                                Title: Managing Director

<PAGE>

                                            KZH PONDVIEW LLC

                                            By: /s/ HI HUA
                                                --------------------------------
                                                Name: Hi Hua
                                                Title: Authorized Agent

<PAGE>

                                            PROTECTIVE LIFE INS. CO.

                                            By: /s/ DIANE S. GRISWOLD
                                                --------------------------------
                                                Name: Diane S. Griswold
                                                Title: AVP

<PAGE>

                                            ORIX FUNDING LLC

                                            By: /s/ ANN E. MORRIS
                                                --------------------------------
                                                Name: Ann E. Morris
                                                Title: Asst Vice President

<PAGE>

                                            FOOTHILL INCOME TRUST, L.P.
                                            By FIT GP, LLC, its General Partner

                                            By: /s/ DENNIS R. ASCHER
                                                --------------------------------
                                                Name: Dennis R. Ascher
                                                Title: Managing Member

<PAGE>

                                            GALLATIN FUNDING I LTD.
                                            By: Bear Stearns Asset Management
                                            Inc. as its Collateral Manager

                                            By: /s/ JONATHAN BERG
                                                --------------------------------
                                                Name: Jonathan Berg
                                                Title: Vice President

<PAGE>

         This WAIVER, dated as of March [ ], 2004 (this "Waiver"), to the
Amended and Restated Credit Agreement, dated as of July 16, 2003 (as the same
may be amended, supplemented or otherwise modified from time to time, the
"Credit Agreement"), among CALPINE CORPORATION, a Delaware corporation (together
with its successors, the "Borrower"), the various financial institutions as are
or may become parties hereto (collectively, the "Lenders"), various lead
Arrangers (as defined below), and THE BANK OF NOVA SCOTIA ("Scotia Capital"), as
administrative Agent and funding agent (in such capacity, the "Agent").

                                            AURUM CLO 2002-1 LTD.

                                            BY: COLUMBIA MANAGEMENT ADVISORS,
                                            INC., AS INVESTMENT MANAGER

                                            By: /s/ KATHLEEN A. ZARN
                                                --------------------------------
                                                Name: Kathleen A. Zarn
                                                Title: Senior Vice President

<PAGE>

         This WAIVER, dated as of March [ ], 2004 (this "Waiver"), to the
Amended and Restated Credit Agreement, dated as of July 16, 2003 (as the same
may be amended, supplemented or otherwise modified from time to time, the
"Credit Agreement"), among CALPINE CORPORATION, a Delaware corporation (together
with its successors, the "Borrower"), the various financial institutions as are
or may become parties hereto (collectively, the "Lenders"), various lead
Arrangers (as defined below), and THE BANK OF NOVA SCOTIA ("Scotia Capital"), as
administrative Agent and funding agent (in such capacity, the "Agent").

                                            STEIN ROE & FARNHAM CLO I LTD.

                                            BY: COLUMBIA MANAGEMENT ADVISORS,
                                            INC., AS PORTFOLIO MANAGER

                                            By: /s/ KATHLEEN A. ZARN
                                                --------------------------------
                                                Name: Kathleen A. Zarn
                                                Title: Senior Vice President

<PAGE>

                                            LANDMARK III CDO LIMITED
                                            BY: ALADDIN CAPITAL MANAGEMENT LLC
                                                AS MANAGER

                                            By: /s/ ANGELA BOZORGMIR
                                                --------------------------------
                                                Name: Angela A. Bozorgmir
                                                Title: Director

                                            LANDMARK II CDO LIMITED
                                            BY: ALADDIN CAPITAL MANAGEMENT LLC
                                                AS MANAGER

                                            By: /s/ ANGELA BOZORGMIR
                                                --------------------------------
                                                Name: Angela A. Bozorgmir
                                                Title: Director

                                            LANDMARK CDO LIMITED
                                            BY: ALADDIN CAPITAL MANAGEMENT LLC
                                                AS MANAGER

                                            By: /s/ ANGELA BOZORGMIR
                                                --------------------------------
                                                Name: Angela A. Bozorgmir
                                                Title: Director

<PAGE>

                                            CARLYLE HIGH YIELD PARTNERS II, LTD.

                                            By: /s/ MARK ALTER
                                                --------------------------------
                                                Name: Mark Alter
                                                Title: Managing Director

<PAGE>

                                           CARLYLE HIGH YIELD PARTNERS III, LTD.

                                           By: /s/ MARK ALTER
                                               ---------------------------------
                                               Name: Mark Alter
                                               Title: Managing Director

<PAGE>

                                            CARLYLE HIGH YIELD PARTNERS IV, LTD.

                                            By: /s/ MARK ALTER
                                                --------------------------------
                                                Name: Mark Alter
                                                Title: Managing Director

<PAGE>

                                            CARLYLE HIGH YIELD PARTNERS, L.P.

                                            By: /s/ MARK ALTER
                                                --------------------------------
                                                Name: Mark Alter
                                                Title: Managing Director

<PAGE>

                                            CARLYLE LOAN OPPORTUNITY FUND

                                            By: /s/ MARK ALTER
                                                --------------------------------
                                                Name: Mark Alter
                                                Title: Managing Director<PAGE>

                                                                EXHIBIT 10.1.7.2

                              AMENDMENT NO.1 TO THE
                        SECOND AMENDMENT PLEDGE AGREEMENT

                  THIS AMENDMENT NO.1, dated as of November 18, 2003 (this
"Amendment"), to the Second Amendment Pledge Agreement, dated as of July 16,
2003, (as the same may be amended, supplemented or otherwise modified from time
to time, the "Pledge Agreement"), made by Calpine Corporation, a Delaware
corporation (the "Company"), in favor of The Bank of New York, as Collateral
Trustee (together with any successor(s) thereto in such capacity, the
"Collateral Trustee") for the benefit of the Secured Parties.

                                   WITNESSETH:

                  WHEREAS, the Company may, from time to time, eliminate and
restructure its Subsidiaries in connection with ordinary course corporate
reorganization, provided that the assets held by any such subsidiaries are
transferred to the Company or otherwise remain a part of the Collateral, subject
to the terms and conditions of the Secured Debt Documents;

                  WHEREAS, the pledge of the stock interest of WRMS Engineering,
Inc. was released in connection with certain restructurings by the Company;

                  WHEREAS, pursuant to Section 4.2 of the Pledge Agreement, the
Company has delivered to the Collateral Trustee a share certificate evidencing
its interest in Calpine Development Holdings, Inc., along with an executed
undated blank stock power; and

                  WHEREAS, the Company now wishes to amend the Pledge Agreement
in certain respects, as hereinafter provided.

                                    AGREEMENT

                  NOW THEREFORE, in consideration of the premises and the mutual
agreements set forth, the receipt and sufficiency of which are hereby
acknowledged, the parties hereto hereby agree as follows:

                  1. Definitions. Unless otherwise defined herein or the context
otherwise requires, terms used in this Amendment, including in its preamble and
recitals, have the respective meanings assigned to such terms in the Collateral
Trust Agreement dated as of July 16, 2003, among the Company, Quintana Minerals
(USA), Inc., JOQ Canada, Inc., Quintana Canada Holdings, LLC, The Bank of Nova
Scotia, as Agent under the Credit Agreement, Wilmington Trust Company, as
Trustee under the 2007 Indenture, the 2010 Indenture and the 2013 Indenture,
Goldman Sachs Credit Partners L.P., as Administrative Agent under the Term Loan
Agreement, and the Collateral Trustee.

                  2. Amendment to Attachment 1 to the Pledge Agreement.
Attachment 1 to the Pledge Agreement is hereby amended as follows:

                  (a)      deleting therefrom WRMS Engineering, Inc. as a
                  Pledged Share Issuer; and

<PAGE>

                  (b)      adding therein Calpine Development Holdings, Inc.

                  The fully amended and restated Attachment 1 is attached
hereto.

                  3. Representations and Warranties. The Company hereby
represents and warrants to the Collateral Trustee that (a) this Amendment has
been duly authorized, executed and delivered by the Company and constitutes its
valid and legally binding obligation, enforceable against it in accordance with
its terms, subject to bankruptcy, insolvency, fraudulent transfer,
reorganization, moratorium and similar laws of general applicability relating to
or affecting creditors' rights and to general equity principles; and (b) the
execution and delivery of this Amendment (i) does not require any consent,
approval, authorization or order of, or filing with, any governmental agency or
body or any court, except such as have been obtained or made and are in full
force and effect as of the date hereof and (ii) will not violate any applicable
law or regulation or the charter, by-laws or other organizational documents of
the Company or any order of any governmental agency or body, or breach or
conflict with any material agreement to which the Company is a party or by which
the Company is bound.

                  4. Effectiveness. This Amendment shall become effective upon
fulfillment of the following conditions precedent: (a) receipt by the Collateral
Trustee of the duly executed signature page of this Amendment signed on behalf
of the Company and (b) receipt by the Collateral Trustee of an Officer's
Certificate and an Opinion of Company Counsel, dated the date hereof, in
accordance with section 7.1 of the Collateral Trust Agreement.. This Amendment
may be executed in counterparts and all of the said counterparts taken together
shall be deemed to constitute one and the same instrument. Delivery of an
executed signature page of this Amendment by facsimile transmission shall be
effective as delivery of a manually executed counterpart hereof.

                  5. Continuing Effect of the Pledge Agreement. Except as
expressly set forth herein, this Amendment shall not by implication or otherwise
limit, impair, constitute a waiver of, or otherwise affect the rights and
remedies of the Secured Parties, the Collateral Trustee or the Company under the
Pledge Agreement and shall not alter, modify, amend or in any way affect any of
the terms, conditions, obligations, covenants or agreements contained in the
Pledge Agreement, all of which are ratified and affirmed in all respects and
shall continue in full force and effect. Nothing herein shall be deemed to
entitle the Company to a consent to, or a waiver, amendment, modification or
other change of, any of the terms, conditions, obligations, covenants or
agreements contained in the Pledge Agreement in similar or different
circumstances. This Amendment shall apply and be effective only with respect to
the provisions of the Pledge Agreement specifically referred to herein. After
this Amendment becomes effective in accordance with Section 4 hereof, any
reference to the Pledge Agreement shall mean the Pledge Agreement as amended and
modified hereby.

6. Applicable Law. This Amendment and the right and obligations of the parties
hereunder shall be governed by, and shall be construed and enforced in
accordance with, the laws of the State of New York without regard to conflict of
laws principles thereof.

                                       -2-
<PAGE>

                  7. Headings. Headings herein are include herein for
convenience of reference only and shall not constitute a part hereof for any
other purpose or be given any substantive effect.

                                       -3-
<PAGE>

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

                                   CALPINE CORPORATION

                                   By:  ANN B. CURTIS
                                      ------------------------------------------
                                      Name: Ann B. Curtis
                                      Title: Executive Vice President

                                   THE BANK OF NEW YORK, NOT IN ITS
                                   INDIVIDUAL CAPACITY, BUT SOLELY AS COLLATERAL
                                   TRUSTEE

                                   By:  MICHAEL PITFICK
                                      ------------------------------------------
                                      Name: Michael Pitfick
                                      Title: Assistant Vice President

<PAGE>

                                                                    ATTACHMENT 1
                                                                              TO
                                                           AMENDMENT NO.1 TO THE
                                               SECOND AMENDMENT PLEDGE AGREEMENT

                                 PLEDGED SHARES

<TABLE>
<CAPTION>
                                                   Common
                                                    Stock
                                                 -----------     % of
                                                 Outstanding    Pledged
            Pledged Share Issuer:                  Shares       Shares
---------------------------------------------    -----------    -------
<S>                                              <C>            <C>
CPN Energy Services, GP, Inc.                         1000        100%
CPN Energy Services, LP, Inc.                         1000        100%
Calpine CCFC II Holdings, Inc.                        1000        100%
Calpine Central, Inc.                                 1000        100%
Calpine Eastern Corporation                           1000        100%
Calpine Dighton, Inc.                                 1000        100%
CPN Auburndale, Inc. [*]                              1000        100%
Calpine Auburndale, Inc.[*]                           1000        100%
Calpine Gordonsville, Inc.                            1000        100%
Calpine Rumford, Inc.                                  100        100%
Calpine Rumford I, Inc.                               1000        100%
Calpine Tiverton, Inc.                                 100        100%
Calpine Tiverton I, Inc.                               100        100%
Calpine Northeast Marketing, Inc.                      100        100%
Venture Acquisition Company                           1000        100%
Calpine Northbrook Corporation of Maine, Inc.         1000        100%
Androscoggin Energy, Inc.                             1000        100%
Calpine Project Holdings, Inc.                        1000        100%
Calpine Sumas, Inc.                                   1000        100%
Northwest Cogeneration, Inc.                          1000        100%
Calpine King City, Inc.                               1000        100%
Calpine Gilroy 1, Inc.                                1000        100%
Calpine Gilroy 2, Inc.                                1000        100%
Sutter Dryers, Inc.                                   1000        100%
Calpine Metcalf EPC, Inc.                             1000        100%
Bellingham Cogen, Inc.                                1000        100%
GATX/Calpine-Agnews, Inc.                             3000        100%
Calpine Agnews, Inc.                                  1000        100%
Calpine Power Company                                 1000        100%
</TABLE>

<PAGE>

<TABLE>
<S>                                                <C>            <C>
Calpine Vapor, Inc.                                   1000        100%
Modoc Power, Inc.                                     1000        100%
Santa Rosa Energy Company                             1000        100%
Geysers Finance Company                            100,000        100%
Calpine Thermal Power, Inc.                           1000        100%
Calpine Operations Management Company, Inc.           1000        100%
Calpine Fuels Corporation                             1000        100%
CPN Pipeline Company                                  1000        100%
Calpine Eastern Holdings, Inc.                        1000        100%
Calpine c*Power, Inc.                                 1000        100%
CPN Cascade, Inc.                                     1000        100%
CPN Telephone Flat, Inc.                              1000        100%
Anderson Springs Energy Company                       1000        100%
Calpine Sonoma, Inc.                                  1000        100%
Calpine California Holdings, Inc.                     1000        100%
Calpine Development Holdings, Inc.                    1000        100%
</TABLE>

[*] On August 7, 2003, (i) Calpine Auburndale, Inc. was merged into CPN
    Auburndale, Inc. and (ii) CPN Auburndale, Inc. was converted into a
    Delaware limited liability company, changing its name to "Calpine
    Auburndale Holdings, LLC".

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