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Up-to-the-minute Rita News + Information:
Please visit the Argus website (http://www.

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PSO to Seek Bids for New Generation

PSO is seeking both new peaking resources and base-load
resources. "The competitive bid process provides a fair way for all
available resource options to be evaluated to obtain the lowest reasonable
cost, most reliable power supply resources for our customers.

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com ) for breaking
stories on Hurricane Rita and the energy markets. TULSA, Okla. The target
year for the addition of new peaking capacity is 2008.com/go /rfp.

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The peaking RFP will be available on the company's website beginning
Sept .

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PSO's parent company, American Electric Power (NYSE: AEP), owns more than
36,000 megawatts of generating capacity in the United States and is the
nation's largest electricity generator.PSOklahoma.

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Argus Media, the specialist provider of energy
market news, price information and detailed analysis has experts available to
discuss topics ranging from oil and gas production and supply, environmental
ramifications, refined products availability and more.
Potential site reviews continue and multiple technologies including
integrated gasification combined -cycle (IGCC), pulverized coal and circulating
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AEP is also one of the largest
electric utilities in the United States, with more than 5 million customers
linked to AEP's 11-state electricity transmission and distribution grid.

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The additional base
load capacity will be needed by 2011.

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News Media may contact the following at Argus for more information and
interviews:

Bureau Chief
Peter Rosenthal (202) 349 2872
prosenthal@argusmediagroup. A separate RFP for additional base-load capacity will
follow in October.
"These new power supply resources will support the growing needs for
electricity in Oklahoma," said Stuart Solomon, PSO's president and chief
operating officer.

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HOUSTON, Hurricane Rita is now battering
international energy markets, which have not yet had time to assimilate the
impacts of Hurricane Katrina., Public Service Company of
Oklahoma (PSO) is seeking proposals for new generation to supplement existing
power supply resources to effectively meet customers' power demand
requirements.

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The
company is based in Columbus, Ohio.

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PSO is seeking up to 500 megawatts of new peaking capacity and associated
energy, and up to 650 megawatts of base-load capacity and energy.
News releases and other information about PSO can be found on the World
Wide Web at http://www.

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Argus has also made its online news feed free to read at
http://www.

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argusmediagroup. A draft Request for Proposal (RFP) to add peaking capacity will be
issued Sept.PSOklahoma.

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If you have not already registered on the Argus
website, please do so using the button on the right and you will be able to
view news stories on Rita and other aspects of energy markets.

Argus Media is a leading provider of business intelligence, price
assessments , and market data on the global oil, natural gas, electricity,
coal, emissions and transportation industries.
Based in Tulsa, PSO has more than 4,000 megawatts of generating capacity and
offers some of the lowest energy prices in the United States.

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Hurricane Rita - Impact on Energy Markets; Argus Energy Industry Experts Available for Interviews

PSO will solicit new resources through a competitive bid process in which
the company's "self build" options will compete against third-party proposals.
PSO, a unit of American Electric Power, is an electric utility company
serving approximately 509,000 customers in eastern and southwestern Oklahoma.