 CALGARY, AB, May 3, 2021 PRNewswire - TransAlta Corporation TransAlta or the Company TSX: TA NYSE: TAC announced today that it has entered into a long-term Power Purchase Agreement PPA with Pembina Pipeline Corporation Pembina for the offtake of 100 MW from its proposed 130 MW Garden Plain Wind Power Project Garden Plain or facility, to be located approximately 30 km north of Hanna, Alberta. Under this agreement, Pembina will receive both renewable electricity and environmental attributes for an 18-year term. 