TransAlta Development and Strategic Accomplishments

White Rock East and West Project Highlights Location Caddo County, OK Contracted 100% Size 300 MW Customer PPA Executed Technology Vestas V162 6.0 - 162 Term TBA Vestas V136 3.45 - 136 COD H2 2023 EBITDA US$44 million On-site construction to begin in later 2022 White Rock East and White Rock West will collectively be TransAlta's largest wind facility Provides a significant step towards 2 GW target Consists of 51 Vestas turbines between both sites 24 24 Our 6th and 7th wind facilities in the US TransAlta

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