<DOCUMENT>
<TYPE>EX-23
<SEQUENCE>5
<FILENAME>ex23-4.txt
<TEXT>
                                                                    EXHIBIT 23.4


                                LETTER OF CONSENT


We hereby  consent  to the  incorporation  by  reference  on Form 8-K of Calpine
Corporation  (the  "Company")  and to the said  references  to this firm for the
Company's  estimated  Canadian  proved  reserves  contained  on Form  8-K  dated
December 31, 2004.

                                       Yours truly,

                                       GLJ PETROLEUM CONSULTANTS LTD.

                                       By: /s/ Myron J. Hladyshevsky
                                           ---------------------------------
                                           Myron J. Hladyshevsky, P. Eng.
                                           Vice President


Calgary, Alberta
October 11, 2005
</TEXT>
</DOCUMENT>