Puget Sound Energy Files for Reconsideration of Certain

Puget Sound Energy Files for Reconsideration of Certain Conditions in
Approval of Proposed Agreement for Centralia Plant 
CALGARY, ALBERTA -- (Marketwire) -- 01/23/13 -- TransAlta Corporation
(TSX:TA) (NYSE:TAC) announced today that Puget Sound Energy ("PSE")
has filed a petition for reconsideration of certain conditions within
the decision issued by the Washington Utilities and Transportation
Commission (the "WUTC") on January 9, 2013 approving the proposed
long-term power purchase agreement (the "PPA") between PSE and
TransAlta Centralia Generation LLC for the Centralia, Washington
power plant. The proposed agreement approved by the WUTC would permit
PSE to purchase an average 346 megawatts of coal transition power
from TransAlta's Centralia power plant. 
"PSE's decision to file for reconsideration provides PSE and the WUTC
a process to resolve any concerns with the conditions adopted by the
WUTC in its approval of the proposed agreement," said Dawn Farrell,
President and CEO, TransAlta Corporation. "TransAlta, along with
other stakeholders, is closely monitoring the progress of this
agreement and cooperating as required to support implementing an
acceptable solution for all parties involved." 
TransAlta is a power generation and wholesale marketing company
focused on creating long-term shareholder value. TransAlta maintains
a low-to-moderate risk profile by operating a highly contracted
portfolio of assets in Canada, the United States and Australia.
TransAlta's focus is to efficiently operate geothermal, wind, hydro,
natural gas and coal facilities in order to provide customers with a
reliable, low-cost source of power. For over 100 years, TransAlta has
been a responsible operator and a proud contributor to the
communities in which it works and lives. TransAlta has been selected
by Jantzi-Sustainalytics as one of Canada's Top 50 Socially
Responsible Companies since 2009 and is recognized globally for its
leadership on sustainability and corporate responsibility standards
by FTSE4Good. TransAlta is Canada's largest investor-owned renewable
energy provider. 
This news release may contain forward looking statements, including
statements regarding the business and anticipated financial
performance of TransAlta Corporation. These statements are based on
 Corporation's belief and assumptions based on information
available at the time the assumption was made. These statements are
subject to a number of risks and uncertainties that may cause actual
results to differ materially from those contemplated by the
forward-looking statements. Some of the factors that could cause such
differences include legislative or regulatory developments and
general economic conditions in geographic areas where TransAlta
Corporation operates.
Media Inquiries:
Stacey Hatcher
Senior Corporate Relations Advisor
Toll-free media number: 1-855-255-9189
Investor Inquiries:
Jess Nieukerk
Director, Investor Relations
(403) 267-3607
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