TransAlta has been ordered to rebuild units at its Sundance coal-fired power plant that are at the centre of dispute with TransCanada Corp.
Last year, TransAlta said the units at the Calgary facility could not be repaired economically and must be shut down permanently.
The move irked TransCanada because it ended a power purchase agreement about six years before it was supposed to wrap up.
The pipeline and utility giant argued TransAlta failed to adequately prove that the units could not be repaired economically.
Today an independent arbitration panel ordered TransAlta to rebuild the units.