Exhibit 99.1      Press Release Dated April 20, 2000

NEWS RELEASE
Contact: Calpine (408) 995-5115
Public Relations      Katherine Potter  ext. 1168
Investor Relations    Rick Barraza      ext. 1125

CALPINE ANNOUNCES 250-MEGAWATT "CALGARY ENERGY CENTRE"

The  Proposed  State-of-the-Art  Project  Will Help Meet the Needs of  Calgary's
Energy Future

(SAN  JOSE,  CALIF./CALGARY,   AB)  -  April  20,  2000  -  Calpine  Corporation
[NYSE:CPN],  the  San  Jose,  Calif.-based  independent  power  producer,  today
announced  plans to construct the US$135 million  Calgary Energy Centre (CEC) to
increase security of electricity supply for Calgarians.

Scheduled   to   begin   commercial   operation   in  2003,   the   250-megawatt
combined-cycle,  natural gas-fired  facility will be the first independent power
project (IPP)  announced in the Calgary area,  and  represents  Calpine's  first
investment in the Canadian  power  industry.  The facility will generate  enough
power to supply  approximately  a quarter of a million homes,  and will have the
ability to produce an additional 50 megawatts of electricity  during peak demand
periods.

"We are  pleased to  announce  the Calgary  Energy  Centre,"  stated Dan Allard,
vice-president  of business  development for Calpine.  "This project responds to
rising demand for power, to a real need for generation near Calgary,  and to the
opportunities  provided by Alberta's  deregulation  process.  The Calgary Energy
Centre  exemplifies  Calpine's  commitment  to  repowering  North  America  with
high-efficiency, environmentally responsible power generation."

Alberta's Resource  Development  Minister and acting Provincial  Treasurer,  Dr.
Steve  West,  welcomed  the  announcement,  saying the arrival of Calpine to the
Alberta market shows that restructuring in the electricity industry is working.

"This is an example of the benefits of a competitive  market,  where the private
sector makes  investment  decisions based on market needs - in this case, a need
for additional  power  generation in southern  Alberta - not on the direction of
the regulator," West said. "This is the kind of innovation and  responsiveness a
competitive electricity marketplace will bring to Alberta."

The Calgary Energy Centre will supply  electricity to the Alberta Power Pool and
provide  a  competitive  source of supply to  Calgary  customers  as the  market
prepares for full  electricity  deregulation  and customer  choice on January 1,
2001. It will also help meet the recommendations of the province's  Transmission
Administrator  and the  Alberta  Energy and  Utilities  Board to attract 500 new
megawatts of power generation to meet demand growth in southern Alberta.

Calpine proposes to build a clean, modern natural gas-fired facility. It will be
located  adjacent  to an  existing  natural gas  processing  plant in  northeast
Calgary. The project will utilize Selective Catalytic Reduction Technology.  The
plant  will  be   permitted   at  3.5  parts  per  million  of  nitrogen   oxide
emissions-significantly  lower than  Canadian  regulatory  limits.  In addition,
sulfur dioxide  emissions will be eliminated,  and carbon dioxide emissions will
be minimized.

Calpine's  project will create  approximately  300 jobs during peak construction
and  20-to-25  full  time   positions  when  the  facility   enters   operation.
Construction is expected to commence this fall.

Calpine Corporation, the leading independent power company in the United States,
is dedicated  to  providing  customers  with clean,  reliable and  competitively
priced  electricity.  Calpine  is  active  in 20  states  and  Alberta,  Canada.
Calpine's Corporate  headquarters are located in San Jose, Calif., with regional
offices in  Houston,  Texas;  Pleasanton,  Calif.;  and  Boston,  Mass.  Calpine
currently has  approximately  17,200  megawatts of capacity in operation,  under
construction  or in announced  development - enough energy to power more than 17
million  households.  The company was founded in 1984 and is publicly  traded on
the New York Stock Exchange under the symbol CPN.

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) changes in government  regulations and anticipated  deregulation
of the electric energy industry;  (ii) commercial  operations of new plants that
may be delayed or  prevented  because of various  development  and  construction
risks,  such as a failure  to obtain  financing  and the  necessary  permits  to
operate or the failure of third-party  contractors to perform their  contractual
obligations  (iii) cost estimates are  preliminary and actual cost may be higher
than  estimated,  (iv) the  assurance  that the Company will develop  additional
plants,  (v) a  competitor's  development of a lower-cost  generating  gas-fired
power plant or (vi) the risks  associated  with marketing and selling power from
power plants in the newly competitive energy market.  Prospective  investors are
also referred to the other risks  identified  from time to time in the Company's
reports and  registration  statements  filed with the  Securities  and  Exchange
Commission.