The purchase means that TransAlta now controls 46% of the electricity generation market in Alberta - a development that has been criticized by numerous academics and industry officials as "a catastrophe" and likely to lead to economic withholding.

At the end of 2010, TransAlta became the first company to own and operate more than 1,000 MW of installed wind capacity in Canada—almost 30 per cent of the country's total.

TransAlta has gradually been transitioning its energy-generating facilities away from coal, due to adverse environmental effects, towards natural gas.

As part of the settlement agreement, TransAlta agreed to discontinue its court appeal of the AUC's decision concerning the four outage events.TransAlta's legal appeal came as a result of the AUC's determination in its ruling that the “MSA did not prove, on the balance of probabilities, that the company breached applicable legislation on the basis that its compliance policies, practices, and oversight thereof, were inadequate and deficient.” In response to the dispute regarding its understanding of Alberta market rules governing forced outages, TransAlta implemented two independent, third-party reviews of its compliance procedures.

[11] In 2016, it was revealed that TransAlta gave $54,000 to University of Alberta professor Warren Kindzierski to research the health impacts of coal-fired plants near Edmonton.

The study concluded that 'the high number of coal-fired power plants near the city of Edmonton doesn't negatively impact the health of local residents,' and was used by TransAlta as 'scientific backing' to push for an alternative to Alberta's then-plan to phase out coal by 2030.

[12] Upper Mamquam, built by Canadian Hydro Developers and operational since 2005, is a run-of-the-river hydroelectric plant 5 km northeast of Squamish, BC.

[13][14] Bone Creek a hydroelectric plant constructed in 2011, has a 5 km penstock dropping 148 meters to a powerhouse with two 9.6MW Francis turbines.

[15] Akolkolex, built by Canadian Hydro Developers and operational since 1995, uses two Francis turbines in a 10 MW run-of-river hydroelectric plant discharging into Arrow Lakes.

[16] Pingston Creek has a 12 meter high sheetpile rock-fill dam which diverts water to the western shore of Arrow Lakes.