UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549


                                    FORM 8-K

                                 CURRENT REPORT

                       Pursuant to Section 13 or 15(d) of
                       the Securities Exchange Act of 1934


        Date of Report (Date of earliest event reported): August 11, 2005


                               CALPINE CORPORATION
             (Exact name of registrant as specified in its charter)

                                    Delaware
                 (State of Other Jurisdiction of Incorporation)

                        Commission file number: 001-12079

                  I.R.S. Employer Identification No. 77-0212977

                           50 West San Fernando Street
                           San Jose, California 95113
                            Telephone: (408) 995-5115
         (Address of principal executive offices and telephone number)

     Check the  appropriate  box below if the Form 8-K  filing  is  intended  to
simultaneously  satisfy the filing obligation of the registrant under any of the
following provisions:

     [ ]  Written communications pursuant to Rule 425 under the Securities Act
          (17 CFR 230.425)

     [ ]  Soliciting material pursuant to Rule 14a-12 under the Exchange Act
          (17 CFR 240.14a-12)

     [ ]  Pre-commencement communications pursuant to Rule 14d-2(b) under the
          Exchange Act (17 CFR 240.14d-2(b))

     [ ]  Pre-commencement communications pursuant to Rule 13e-4(c) under the
          Exchange Act (17 CFR 240.13e-4(c))





ITEM 2.05 -- COSTS ASSOCIATED WITH EXIT OR DISPOSAL ACTIVITIES

     On August 16, 2005,  Calpine  Corporation  (the  "Company")  issued a press
release  announcing  that  the  Company  had  agreed  to sell  its  550-megawatt
Ontelaunee  Energy  Center to LS Power  Equity  Partners,  LP for $225  million,
following  approval  of the  sale by the  Executive  Committee  of the  Board of
Directors on August 11, 2005. The Company estimates cash expenditures related to
the sale to be approximately $1.0 million for transaction costs, primarily legal
fees. In connection  with the sale, the Company  estimates that it will record a
loss on the sale of this  asset  of  approximately  $130  million,  taking  into
account such transaction  costs, in the third quarter of 2005 within the results
of  discontinued  operations.  In addition,  the Company would record a non-cash
charge related to the write-off of  unamortized  deferred  financing  costs if a
portion of the net proceeds is used to repurchase or retire debt,  but we cannot
presently  estimate the amount of such  charge.  For more  information,  see the
press  release  attached  hereto  as  Exhibit  99.1 and  incorporated  herein by
reference.



ITEM 9.01 -- FINANCIAL STATEMENTS AND EXHIBITS

(a)  Financial Statements of Businesses Acquired.

     Not  Applicable

(b)  Pro Forma Financial Information.

     Not  Applicable

(c)  Exhibits.

     99.1. Press release dated August 16, 2005.







                                   SIGNATURES

Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.

                                  CALPINE CORPORATION

                                  By:  /s/ Charles B. Clark, Jr.
                                       ------------------------------------
                                       Charles B. Clark, Jr.
                                       Senior Vice President, Controller and
                                       Chief Accounting Officer


Date: August 22, 2005




                                 EXHIBIT INDEX


                              Exhibit    Description
                              -------    -----------
                              99.1       Press release




EXHIBIT 99.1



NEWS RELEASE                                            CONTACTS: (408) 995-5115
                                    Media Relations:  Bill Highlander, Ext. 1244
                                    Investor Relations:  Karen Bunton, Ext. 1121


            Calpine to Sell Ontelaunee Energy Center for $225 Million

     (SAN JOSE,  Calif.) /PR  Newswire - First  Call/  August 16, 2005 - Calpine
Corporation  [NYSE:CPN] has agreed to sell its  550-megawatt  Ontelaunee  Energy
Center to LS Power Equity  Partners,  LP (LS Power) for $225 million.  The asset
sale is part of Calpine's  strategic  initiative to reduce debt and optimize its
power plant  portfolio.  Since  launching its strategic  initiative in May 2005,
Calpine has completed or announced more than $2 billion of asset sales.

     The Ontelaunee  sale is the third of four planned power plant sales,  which
the company  announced  in June 2005.  Calpine  expects to complete  the sale in
September,  pending  regulatory  approval and other  conditions of closing.  Net
proceeds  from  the  sale of  Ontelaunee  will be used  to  reduce  debt  and as
otherwise permitted by the company's indentures.

     "By  divesting  of  non-strategic  assets like  Ontelaunee,  we continue to
de-lever  our balance  sheet and  re-focus  resources  on  Calpine's  core power
markets,"  stated Calpine  Executive  Vice President and CFO Bob Kelly.  "At the
same time, by providing LS Power a broad range of operational and power services
for  Ontelaunee,  Calpine has a great  opportunity to expand our energy services
business units."

     As part of the  transaction,  Calpine will continue to operate the plant on
behalf of LS Power for five years,  and provide  turbine  maintenance  and parts
services for ten years. Calpine Energy Services, the trading and risk management
subsidiary  for  Calpine,  will supply a variety of energy  services,  including
power marketing, and scheduling of power and fuel for a six-month term.

     The Ontelaunee Energy Center is a natural gas-fired,  combined-cycle  power
plant located in Ontelaunee Township, Pennsylvania. The plant entered operations
in 2002 and generates electricity for the Pennsylvania-New Jersey-Maryland power
market.


About Calpine

     A  major  power  company,   Calpine  Corporation   supplies  customers  and
communities  with  electricity  from clean,  efficient,  natural  gas-fired  and
geothermal power plants. Calpine owns, leases and operates integrated systems of
plants in 21 U.S. states and three Canadian  provinces.  Its customized products
and services include wholesale and retail electricity,  natural gas, gas turbine
components  and  services,  energy  management,  and a wide range of power plant
engineering,  construction and operations services. Calpine was founded in 1984.
It is included in the S&P 500 Index and is publicly traded on the New York Stock
Exchange under the symbol CPN. For more information, visit www.calpine.com.

     This  news  release  discusses  certain  matters  that  may  be  considered
"forward-looking" statements within the meaning of Section 27A of the Securities
Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934,
as  amended,  including  statements  regarding  the  intent,  belief or  current
expectations  of  Calpine   Corporation  ("the  Company")  and  its  management.
Prospective investors are cautioned that any such forward-looking statements are
not  guarantees  of  future  performance  and  involve  a number  of  risks  and
uncertainties  that could  materially  affect  actual  results  such as, but not
limited to, (i) the timing and extent of  deregulation of energy markets and the
rules and regulations adopted on a transitional basis with respect thereto; (ii)
the timing and extent of changes in  commodity  prices for energy,  particularly
natural gas and electricity; (iii) unscheduled outages of operating plants; (iv)
a competitor's  development of lower cost generating gas-fired power plants; (v)
risks  associated  with  marketing  and selling  power from power  plants in the
newly-competitive   energy  market;   and  (vi)  other  risks   identified  from
time-to-time in the Company's reports and registration statements filed with the
SEC, including the risk factors identified in its Annual Report on Form 10-K for
the year ended December 31, 2004,  and in its Quarterly  Report on Form 10-Q for
the three  months  ended  June 30,  2005,  which  can be found on the  Company's
website at www.calpine.com. All information set forth in this news release is as
of today's date, and the Company undertakes no duty to update this information.