EX-23 4 ex23-3.txt EXHIBIT 23.3 CONSENT OF NETHERLAND, SEWELL & ASSOCIATES, INC. ------------------------------------------------ We hereby consent to the incorporation by reference on Form 8-K of Calpine Corporation (the "Company") and to the references to this firm for the Company's estimated domestic proved reserves contained in Form 8-K for the year ended December 31, 2004. NETHERLAND, SEWELL & ASSOCIATES, INC. By: /s/ Danny D. Simmons --------------------------------- Danny D. Simmons Executive Vice President Houston, Texas October 11, 2005