EXHIBIT 4.5



                             SUPPLEMENTAL INDENTURE

                         Dated as of September 18, 2003

                                     Between

                   CALPINE CONSTRUCTION FINANCE COMPANY, L.P.

                                       AND

                               CCFC FINANCE CORP.

                         AND THE GUARANTORS NAMED HEREIN

                              WILMINGTON TRUST FSB

                                     Trustee

                           Supplementing the Indenture
                           Dated as of August 14, 2003





          SUPPLEMENTAL   INDENTURE,   dated  as  of  September   18,  2003  (the
"Supplemental Indenture"), between Calpine Construction Finance Company, L.P., a
Delaware limited  partnership  (the  "Company"),  CCFC Finance Corp., a Delaware
corporation  ("Finance  Corp."),  the Guarantors  and  Wilmington  Trust FSB, as
trustee (the "Trustee").

          WHEREAS,  the Company,  Finance Corp. and the Guarantors  executed and
delivered the  Indenture  dated as of August 14, 2003 (the  "Indenture")  to the
Trustee in connection  with the  co-issuance by the Company and Finance Corp. of
$365,000,000  Second Priority  Senior Secured  Floating Rate Notes due 2011 (the
"Notes");

          WHEREAS,  the  Holders of at least a majority in  aggregate  principal
amount of the  Notes  have  approved  such  amendment  proposed  by the  Company
pursuant  to  Section  9.02 of the  Indenture,  the  parties  hereto  desire  to
supplement and amend Section 4.07 of the Indenture as provided herein; and

          NOW  THEREFORE,  for and in  consideration  of the premises and mutual
covenants herein contained,  the Company,  Finance Corp., the Guarantors and the
Trustee agree as follows:

                                    ARTICLE I
                                   DEFINITIONS

          Section 1.1 Definition of Terms.

          Unless the context otherwise  requires,  capitalized terms used herein
that are not otherwise  defined  herein shall have the meaning  assigned to such
terms in the Indenture.


                                   ARTICLE II
                           AMENDMENTS TO THE INDENTURE

          Section 2.1 Amendments.

          Section 4.07 (Restricted  Payments) of the Indenture is hereby amended
to insert the following as the last sentence of such section:

          "Notwithstanding  the foregoing,  the Company may distribute
          to the direct or indirect  holders of the  Company's  Equity
          Interests in their  capacity as such the net  proceeds  from
          any issuance of Indebtedness incurred pursuant to clause (3)
          of Section  4.09 hereof  (other than  Permitted  Refinancing
          Indebtedness incurred pursuant to such clause (3) to refund,
          refinance or replace any  Indebtedness  previously  incurred
          pursuant to such clause (3))."

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                                   ARTICLE III
                                  MISCELLANEOUS

          Section 3.1 Interpretation.

          Upon  execution  and  delivery  of this  Supplemental  Indenture,  the
Indenture  shall be modified and amended in  accordance  with this  Supplemental
Indenture,  and all the terms and  conditions  of both shall be read together as
though they  constitute one  instrument,  except that, in case of conflict,  the
provisions of this  Supplemental  Indenture  will  control.  The  Indenture,  as
modified  and amended by this  Supplemental  Indenture,  is hereby  ratified and
confirmed  in all  respects  and shall  bind every  holder of Notes.  In case of
conflict  between  the terms  and  conditions  contained  in the Notes and those
contained  in the  Indenture,  as  modified  and  amended  by this  Supplemental
Indenture,  the  provisions  of the  Indenture,  as modified and amended by this
Supplemental Indenture, shall control.

          Section 3.2 The Trustee.

          The Trustee shall not be responsible  in any manner  whatsoever for or
in respect of the validity or sufficiency of this Supplemental  Indenture or for
or in respect of the recitals  contained herein, all of which are made solely by
the Company and Finance Corp.

          Section 3.3 Certain Duties and Responsibilities of the Trustee.

          In entering  into this  Supplemental  Indenture,  the Trustee shall be
entitled  to the benefit of every  provision  of the  Indenture  relating to the
conduct or  affecting  the  liability or  affording  protection  to the Trustee,
whether or not elsewhere herein so provided.

          Section 3.4 Counterparts.

          This  Supplemental   Indenture  may  be  executed  in  any  number  of
counterparts,  each of which when so executed and  delivered  shall be deemed an
original,  but all such  counterparts  together shall constitute but one and the
same  instrument.  The delivery of an executed  signature  of this  Supplemental
Indenture by facsimile transmission shall be effective as delivery of a manually
executed counterpart hereof.

          Section 3.5 Applicable Law.

          This  Supplemental  Indenture  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.

                                      * * *




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               IN  WITNESS   WHEREOF,   the  parties  hereto  have  caused  this
          Supplemental  Indenture  to be duly  executed  as of the day and  year
          first above written.



                                      CALPINE CONSTRUCTION FINANCE COMPANY, L.P.


                                      By:      /s/ ZAMIR RAUF
                                         ---------------------------------------
                                      Name: Zamir Rauf
                                      Title: Vice President


                                      CCFC FINANCE CORP.


                                      By:      /s/ ZAMIR RAUF
                                         ---------------------------------------
                                      Name: Zamir Rauf
                                      Title: Vice President


                                      CALPINE HERMISTON, LLC


                                      By:      /s/ ZAMIR RAUF
                                         ---------------------------------------
                                      Name: Zamir Rauf
                                      Title: Vice President


                                      CPN HERMISTON, LLC


                                      By:      /s/ ZAMIR RAUF
                                         ---------------------------------------
                                      Name: Zamir Rauf
                                      Title: Vice President


                                      HERMISTON POWER PARTNERSHIP

                                      By: Calpine Hermiston, LLC
                                      its General Partner

                                      By:      /s/ ZAMIR RAUF
                                         ---------------------------------------
                                      Name: Zamir Rauf
                                      Title: Vice President



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                                      WILMINGTON TRUST FSB,
                                      as Trustee


                                      By:     /s/ JAMES J. MCGINLEY
                                         ---------------------------------------
                                      Name:  James J. McGinley
                                      Title: Vice President

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