TransAlta

==Calgary Power Company, Ltd.==
===1911-19??===
===19??-1957===
===1957-1968===
===1968-1981===
==TransAlta==
===1981-1997===
TransAlta - 1981.svg|
===1997-2022===
===2022-present===
Category:Power companies
Category:Canada
Category:Alberta
Category:Calgary
Category:1911
Category:1981