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FOURTH AMENDMENT TO
INDEX BASED GAS SALE AND POWER PURCHASE AGREEMENT
 Fourth
Amendment CES CGC Facility Owner Company Party Parties
 RECITALS
 Original Agreement
 Goldendale Facility Schedule 9
  AGREEMENT
  Amendments
 Schedule 9 Schedule 9
 Schedule 9
 Governing Law




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Defined Terms
 Counterparts
 No Assumption
 No Other Amendment
  2




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CALPINE ENERGY SERVICES, L.P.By:
    
    /s/ Thomas MayName:Title:BAYTOWN ENERGY CENTER, L.P.By:
    
    /s/ Zamir RaufName:
    
    Zamir RaufTitle:
    
    Vice PresidentCHANNEL ENERGY CENTER, L.P.By:
    
    /s/ Zamir RaufName:
    
    Zamir RaufTitle:
    
    Vice PresidentCORPUS CHRISTI COGENERATION, L.P.By:
    
    /s/ Zamir RaufName:
    
    Zamir RaufTitle:
    
    Vice PresidentDELTA ENERGY CENTER, LLCBy:
    
    /s/ Zamir RaufName:
    
    Zamir RaufTitle:
    
    Vice President
 CALPINE GENERATING COMPANY, LLCBy:
    
    /s/ Zamir RaufName:
    
    Zamir RaufTitle:
    
    Vice PresidentCARVILLE ENERGY, LLCBy:
    
    /s/ Zamir RaufName:
    
    Zamir RaufTitle:
    
    Vice PresidentCOLUMBIA ENERGY, LLCBy:
    
    /s/ Zamir RaufName:
    
    Zamir RaufTitle:
    
    Vice PresidentDECATUR ENERGY CENTER, LLCBy:
    
    /s/ Zamir RaufName:
    
    Zamir RaufTitle:
    
    Vice PresidentFREESTONE POWER GENERATION, L.P.By:
    
    /s/ Zamir RaufName:
    
    Zamir RaufTitle:
    
    Vice President
   3




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GOLDENDALE ENERGY CENTER, LLCBy:
    
    /s/ Zamir RaufName:Title:MORGAN ENERGY CENTER, LLCBy:
    
    /s/ Zamir RaufName:Title:PASTORIA ENERGY FACILITY L.L.C.By:
    
    /s/ Zamir RaufName:Title:
 LOS MEDANOS ENERGY CENTER, LLCBy:
    
    /s/ Zamir RaufName:Title:CALPINE ONETA POWER, L.P.By:
    
    /s/ Zamir RaufName:Title:ZION ENERGY, LLCBy:
    
    /s/ Zamir RaufName:Title:
   4




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Schedule 9
 Goldendale Energy Center Facility
600 Industrial Park Way
Goldendale, WA 98620
 Location:
 NERC Region:
 Applicable Power Price:
    
    The daily prices published by Dow Jones Telerate in the
section Workstation 3 Pages 38422 under the heading Dow Jones Energy
Service, Dow Jones Mid-C Electricity Price Index: [date] Firm: On Peak for
electricity delivered during the applicable day.
 Fallback Power Reference Price:
    
    The daily weighted average index for on-peak
power in the 10X Day Ahead Power Price Report as published by Intercontinental
Exchange on its official web site currently located at www.theice.com under the
heading Mid C.
 Applicable Fuel Price:
    
    The daily price for applicable day published under the
heading Daily Price Survey ($/MMBtu): Midpoint: Canadian Gas: Northwest,
Can. Bdr. (Sumas) in Gas Daily.
 Total Capacity:
 Applicable Heat Rate:
 Variable O&M Amount:
 Effective Date through December 2004:
    
    $
    0.49January 2005 through December 2005:
    
    
    0.50January 2006 through December 2006:
    
    
    0.51January 2007 through December 2007:
    
    
    0.53January 2008 through December 2008:
    
    
    0.51January 2009 through December 2009:
    
    
    0.52January 2010 through December 2010:
    
    
    0.53January 2011 through December 2011:
    
    
    0.55January 2012 through December 2012:
    
    
    0.56January 2013 through December 2013:
    
    
    0.57
 Planned Outage Months:
 First Planned Outage Month:  Second Planned Outage Month:
 S-1




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Planned Outage Percentage:
  Gas Delivery Point:
    
    The interconnection point between the Duke Energy Gas
Transmission (Westcoast) and the Williams Northwest Pipelines at Huntingdon,
British Columbia, Canada
 Power Delivery Point:
 Facility Transmission Charge Adjustment:
    
    Transmission charges payable to
Bonneville Power Administration
or Klickitat Public Utility
District between the Power
Delivery Point and the
mid-Columbia hub, including
variable and fixed components
 Fixed Price Power Contract (On Peak):
 Fixed Price Power Contracts (Off Peak):
 Host Agreement:
 Direct Power Purchase Agreements:
 Steam Sale Agreements:
 Special Provisions:
 S-2