.
                                                                               .
                                                                               .
                                                                    EXHIBIT 23.8



                                                                                  
[NSAI LOGO] NETHERLAND, SEWELL                               CHAIRMAN EMERITUS                  EXECUTIVE COMMITTEE
            & ASSOCIATES, INC.                          CLARENCE M. NETHERLAND             G. LANCE BINDER - DALLAS
WORLDWIDE PETROLEUM CONSULTANTS                                                          DANNY D. SIMMONS - HOUSTON
ENGINEERING - GEOLOGY - GEOPHYSICS - PETROPHYSICS               CHAIRMAN & CEO
                                                            FREDERIC D. SEWELL              F. SCOTT FROST - DALLAS
                                                                                            DAN PAUL SMITH - DALLAS
                                                               PRESIDENT & COO          JOSEPH J. SPELLMAN - DALLAS
                                                         C.H. (SCOTT) REES III          THOMAS J. TELLA II - DALLAS



                CONSENT OF NETHERLAND, SEWELL & ASSOCIATES, INC.



    We hereby consent to the incorporation by reference in this Registration
    Statement on Form S-3/A (Registration Statement No. 333-76880) included in
    Calpine Corporation's Annual Report on Form 10-K/A for the year ended
    December 31, 2003 regarding Calpine Corporation's estimated domestic proved
    reserves and to the references to this firm included in such Annual Report.

                                          NETHERLAND, SEWELL & ASSOCIATES, INC.

                                          By: /s/ Danny D. Simmons
                                              ---------------------------------
                                              Danny D. Simmons
                                              Executive Vice President


      Houston, Texas
      September 22, 2004

Please be advised that the digital document you are viewing is provided by
Netherland, Sewell & Associates Inc. (NSAI) as a convenience to our clients. The
digital document is intended to be substantively the same as the original signed
document maintained by NSAI. The digital document is subject to the parameters,
limitations, and conditions stated in the original document. In the event of any
differences between the digital document and the original document, the original
document shall control and supersede the digital document.



                                                                                                             
4500 THANKSGIVING TOWER - 1601 ELM STREET - DALLAS, TEXAS 75201-4754 - PH: 214-969-5401 - FAX: 214-969-5411     nsai@nsai-petro.com
1221 LAMAR STREET, SUITE 1200 - HOUSTON, TEXAS 77010-3072 - PH: 713-654-4950 - FAX: 713-654-4951                netherlandsewell.com