Atlantic Power Corporation Announces the Completed Sale of its Interests in the Path 15 Transmission Line and the Syndication of its Tax Equity Investment in Canadian Hills

Atlantic Power Corporation

today announced the closing on April 30, 2013 of its previously announced sale of the Company's interests in the Path 15 transmission line (the "Sale"), including Atlantic Path 15 Transmission, LLC, Atlantic Holdings Path 15, LLC and Atlantic Path 15, LLC (collectively, "Path 15"). Atlantic Power received net cash proceeds from the Sale, including working capital adjustments, of approximately $56 million. All debt issued by Path 15, totaling $137.2 million as of March 31, 2013, transferred with the Sale. The Company also announced today the syndication of its $44 million tax equity investment in the Canadian Hills wind project ("Canadian Hills") with Bank of America Merrill Lynch. In December 2012, Canadian Hills received tax equity investments totaling $225 million from a consortium of four institutional tax equity investors. At that time, Atlantic Power also made a $44 million tax equity investment in Canadian Hills. Net cash proceeds received by the Company for its interest were approximately $42 million, which accounts for the receipt by the Company of cash distributions and tax benefits in 2013 and transaction costs. The syndication of the Company's interest completes the sale of 100% of Canadian Hills' $269 million of tax equity interests. The Company intends to use the net proceeds from these transactions for general corporate purposes, including investment in future accretive growth opportunities. About Atlantic Power Atlantic Power owns and operates a diverse fleet of power generation assets in the United States and Canada. Atlantic Power's power generation projects sell electricity to utilities and other large commercial customers largely under long-term power purchase agreements, which seek to minimize exposure to changes in commodity prices. Its power generation projects in operation have an aggregate gross electric generation capacity of approximately 3,019 MW in which its aggregate ownership interest is approximately 2,098 MW. Its current portfolio consists of interests in twenty-nine operational power generation projects across eleven states in the United States and two provinces in Canada. Atlantic Power recently acquired Ridgeline Energy, Inc., a wind and solar development company located in Seattle, Washington, which enhances its ability to develop, acquire and operate wind and solar energy projects in the United States and Canada. Atlantic Power also owns a majority interest in Rollcast Energy, a biomass power plant developer in North Carolina. Atlantic Power has a market capitalization of approximately $600 million and trades on the New York Stock Exchange under the symbol AT and on the Toronto Stock Exchange under the symbol ATP. For more information, please visit the Company's website at www.atlanticpower.com or contact: