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Environmental Assessment Study

The Ontario Ministry of Transportation (MTO) has retained AECOM Canada Ltd. (AECOM) to undertake a Preliminary Design and Class Environmental Assessment Study for Highway 403 and Highway 6 Interchange infrastructure renewal. The Study limits extend from Grindstone Creek westerly to Old Guelph Road on Highway 403, and from Highway 6 and Highway 403 interchange to Bruce Trail on Highway 6. The Study encompasses fourteen bridges, three structural culverts, and fifteen retaining walls along Highway 403 and Highway 6. Reasonable design alternatives for structural and operational improvements will be developed and evaluated leading to the selection of a preferred alternative(s) for short-term and long-term improvements to ensure the next round of infrastructure rehabilitation/renewal can accommodate future traffic needs of Highway 403 within the Study limits.


The Study Area is located within the City of Hamilton and the City of Burlington (Halton Region).

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The purpose of this website is to provide interested parties with access to Study information and to contact the Project Team.

We encourage you to review the contents of this website and provide us with your feedback. Details on public consultation activities to be undertaken during this Study will be included in the Consultation section of this website. If you wish to be added to our study mailing list or submit comments or questions, please go to the Contact Us page.

There is an opportunity at any time during the study for interested persons to provide input to the Project Team regarding the study.  Comments are being collected to assist MTO in meeting the requirements of the Ontario Environmental Assessment Act.  This material will be maintained on file for use during the Study and may be included in project documentation.  Information collected will be used in accordance with the Freedom of Information and Protection of Privacy Act.  With the exception of personal information, all comments will become part of the public record.

If you have any accessibility requirements in order to participate in this Study, please contact one of the Project Team members listed on the Contact Us page.

Renseignements en français disponibles en composant le 905-418-1418 (Karen Cooper) ou karen.cooper@aecom.com.