Coal-to-Gas Conversions Project

Clean, Reliable and Affordable Electricity

As part of TransAlta’s transition to clean power, we intend to convert up to seven of our coal-fired generating units to natural gas at the Keephills and Sundance power plants.

TransAlta submitted amendment applications to the Alberta Utilities Commission and Alberta Environment and Parks for approval to initiate the conversions as early as 2020.

As a leader in clean energy, TransAlta is planning to make this transition by converting the fuel source for its generators and using the existing plant sites to continue to provide Albertans with clean, reliable and affordable electricity.

How does coal-to-gas conversion work?

The existing generation units at Keephills and Sundance use both coal and natural gas to produce electricity. Natural gas is currently used to start up the units and can be used to produce up to approximately 30 per cent of the generation at each facility.

To convert the units to natural gas, existing equipment will need to be modified, such as the boilers, fans and control systems. In addition, new equipment will be installed including: natural-gas burners, igniters, scanners, piping and valves; while coal-handling equipment will be retired, cleaned and stored in place.

Timeline updates

TransAlta filed amendment applications with the Alberta Utilities Commission (AUC) and Alberta Environment and Parks (AEP) in the summer of 2018. In December 2018, the AUC issued approvals for the conversions of the Sundance (units 3 – 6) and Keephills (units 1-2) power plants. In February 2019, the AUC issued approval for the conversion of Keephills 3. TransAlta has responded to Information Requests from AEP for the Keephills and Sundance applications. Construction of additional gas facilities is scheduled for 2019 and unit conversions are scheduled to start in 2020, continuing to the end of 2023.


Public Consultation

TransAlta is committed to keeping the public and all stakeholders informed as we move forward with the proposed conversions of our coal-fired generating units to natural gas. We will share information about the project through regular newsletters, website updates, our public open house (held May 30, 2018) and meetings with community organizations and groups.

The second project newsletter (February 2019) is available in the Related Information section below. The displays that we shared at our open house are also available for review below.

News Releases

TransAlta announces accelerated transition to clean energy
(December 6, 2017)

TransAlta and Tidewater Midstream announce today a Letter of Intent to construct a Natural Gas Pipeline to TransAlta’s Facilities
(December 6, 2017)

TransAlta Board Approves Plan for Accelerating Transition to Clean Power in Alberta
(April 19, 2017)


Contact Us

If you have any questions or concerns regarding the Coal to Gas Conversions Project, please feel free to contact our team at: