Project overview
Upgrading the equipment at HHGS will increase its generating capacity by 27 MW to an output of 710 MW. The upgrades will be limited to replacing parts of the existing natural gas fired combustion turbines. All upgrade activities will take place within the existing facility and there will be no changes or expansion beyond the existing HHGS footprint.
What's being upgraded?
The upgrades will include replacing parts of the existing natural gas fired combustion turbines with parts that will allow for an increased electrical output. The work is similar to regular facility maintenance activities and will be confined to the existing facility footprint. There will be no change or expansion of the existing HHGS footprint.
Environmental screening process and project timeline
Since the upgrading will result in a 27 MW increase in the electrical output of HHGS, it is subject to the Environmental Screening Process for Electricity Projects per Ontario Regulation 116/01, under the Ontario Environmental Assessment Act. A Notice of Commencement of a Screening and Invitation to a Virtual Public Meeting was issued on May 19, 2023, to communicate the start of the Environmental Screening Process.
Request for exemption
Given that that proposed upgrades to the HHGS are minor - similar to routine maintenance activities - and contained entirely withing the footprint of the existing facility, Atura Power is requesting that the Ontario Ministry of Environment, Conservation and Parks grant an exemption to the Environmental Assessment Act for this project.
We want to hear from you
Atura Power is committed to engaging with Indigenous communities, the public, agencies and other interested parties on all our projects. A public meeting was held on June 15, 2023, to learn about the proposed efficiency upgrades and share feedback, and materials from that meeting are posted below.
Access to information for everyone is important to us, so please let us know if you have accommodation needs related to the meeting materials through the Contact us form below.
Project documents
Project documents will be posted here as they became available. Please let us know if you require an alternate format for any documents posted through the Contact us form below.
- Notice of Commencement of a Screening and Invitation to a Virtual Public Meeting (PDF)
- Halton Hills Generating Station Efficiency Upgrades: Screening Report for Electricity Projects (PDF)
- Notice of Completion of a Screening Report (PDF)
- HHGS Efficiency Upgrades Public Meeting Presentation (PDF)
- HHGS Efficiency Upgrades FAQs (PDF)
- MECP Denial of Individual Environmental Assessment Elevation Request
Contact us
Comments and information regarding this project are being collected in accordance with the Freedom of Information and Protection of Privacy Act for the purpose of meeting environmental assessment requirements. With the exception of personal information, all comments received will become part of the project record.
