Class Environmental Assessment Process


The Detail Design study has been completed and a Design and Construction Report (DCR) was prepared to document this project. For more information, please see the DCR report in the Documentation section.

A DCR was prepared to document details of the project, consultation undertaken during the study, environmental impacts, mitigation measures, construction staging, and traffic detours.

The Detail Design and Class Environmental Assessment (EA) for the reconstruction of the Highway 400/Essa Road interchange, including the replacement of the Highway 400 overpass bridge structures at Essa Road, followed the MTO Class EA for Provincial Transportation Facilities (2000) approved process for Group ‘B’ projects. Group ‘B’ projects include highway improvements that provide a significant increase in traffic capacity or cause a significant widening of the “footprint” beyond the road bed of an existing highway. The replacement and/or improvements to an existing interchange, such as those proposed at Essa Road, fall under the scope of a Group ‘B’ project. 

Detailed information regarding the MTO Class EA and Ontario EA Act is available via the Documentation section of this website.