Announced 300 MW White Rock Wind Project and Fully Executed Corporate PPAs On Dec. 22, 2021, TransAlta executed two long-term Power Purchase Agreements ("PPAs") with a new customer at its 300 MW White Rock East and White Rock West Wind Power Projects located in Caddo County, Oklahoma. The PPA is with a new customer with an AA credit rating from S&P Global Ratings. The White Rock Wind Projects will consist of 51 Vestas turbines. Construction is expected to begin in late 2022 with a target commercial operation date in the second half of 2023. TransAlta will construct, operate and own the facility. Total construction capital is estimated at approximately US$460 million to US$470 million and is expected to be financed with a combination of existing liquidity and tax equity financing.