Selected solution
The selected solution for the project is presented here, i.e. the line route by sector and the two new substations. Several aspects of the optimized project are in direct response to community demands. Learn more about how the initial project was improved thanks to the comments made.
A green corridor for sustainable mobility and biodiversity
In 2018, Hydro‑Québec began discussions with municipal authorities regarding the construction of a 315‑kV transmission line. It soon became apparent that this project provided an excellent opportunity to offer residents access to existing or planned green spaces along the right‑of‑way: a green corridor linking the Parc‑nature du Bois‑de‑Saraguay to Parc Angrignon.
Thanks to Hydro‑Québec’s project, the public will have access to a green corridor in Saint‑Laurent and Montréal‑Ouest where they can walk or cycle in pleasant surroundings.
Landscaping of the green corridor will be carried out by the Montréal agglomeration, its boroughs and demerged cities once the line has been built by Hydro‑Québec.
Substations with integrated architecture
Based on the comments received, the substation design was modified to allow for a more seamless integration in the neighborhood. As a result, we moved the buildings further from homes and we reduced the surface area and height of certain buildings and structures.
A line route that better reflects intended uses
In Côte‑Saint‑Luc, we noticed that the current line, located on the edge of a residential area, could instead follow the railway route. Modifying the route this way would be in line with the “large right‑of‑way or large public infrastructure” land use designation.
Discussions and careful analysis are under way with Canadian Pacific Kansas City (CPKC) to confirm the route’s feasibility.
Adapted towers
Several people stated that the line’s visual impact and the obstructions caused by towers that take up a lot of space on the ground were major concerns.
In response to these concerns, the decision was made to use next-generation towers for this project.
Overview of the results
Would you like to have a better understanding of how the new facilities will be integrated into the urban landscape? We have prepared several visual simulations.
Overview of the results
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Photo of Saraguay substation in the Saint‑Laurent borough -
View as seen from the intersection of Poirier and Thimens boulevards -
View as seen from Cavendish Boulevard, near Boisé Marcel‑Laurin -
View as seen from Cavendish Boulevard, near Côte‑Vertu Boulevard -
View as seen from Cavendish Boulevard, near Dr.-Frederik-Philips Boulevard -
View as seen from Dalton Road -
View as seen from Robert-Burns Street, in the Notre‑Dame‑de‑Grâce sector -
View as seen from Aldred Crescent -
View as seen from the intersection of Harrow Street and Harrow Crescent -
View as seen from Kildare Road -
VView as seen from Kildare Road (Bialik High School) -
View as seen from the right of way behind the residences of Merrimac Road -
View as seen from the intersection of Cavendish boulevard and Fleet Road -
View as seen from Edgemore Avenue -
View of the new Côte‑Saint‑Luc substation as seen from Sabin Street -
View of the new Côte‑Saint‑Luc substation as seen from Sabin Street, with a plant screen -
View as seen from Westminster Nord avenue -
View as seen from Radcliffe Road -
View as seen from Rolland Avenue -
Pedestrian view of the new Rockfield substation from Saint-Joseph Boulevard. -
Pedestrian view of the new Rockfield substation from Victoria Street looking West.
Details of the line route
Would you like to know how the current system will be modified? View the maps of each sector to see the detailed route.
Saint-Laurent
Saraguay substation
The Saraguay transformer substation is the source substation (i.e., the starting point of the line that will be converted).
Located in an industrial area, it was commissioned in 1959 and currently supplies homes, businesses and industrial operations in Pierrefonds-Roxboro, Dollard-des-Ormeaux and Saint‑Laurent.
Line segment between Saraguay and Hampstead substations
Two 120‑kV lines run from Saraguay substation to Laurent substation and then on to Hampstead substation. One of them will be dismantled and rebuilt at 315 kV.
Map showing the line section to be replaced in the Saint‑Laurent borough
Mont‑Royal
Line segment between Saraguay and Hampstead substations
The current line follows a corridor along Chemin Dalton. It will be dismantled and rebuilt in the same location.
Map showing the line section to be replaced in Ville Mont‑Royal
Côte‑des‑Neiges‑Notre‑Dame‑de‑Grâce
Phase 1: Line segment between Saraguay and Hampstead substations
The segment north of Hampstead substation is being studied to optimize the route on Canadian Pacific (CP) property.
Map showing the line section to be replaced in the Côte‑des‑Neiges sector (phase 1)
Phase 2: Line segment between Hampstead and Rockfield substations
Phase 2 covers the segment south of Hampstead substation. An overhead transmission line operated at 120 kV is currently located in the right‑of‑way. It will be dismantled and rebuilt at 315 kV on the same route.
Map showing the line section to be replaced in the Notre‑Dame‑de‑Grâce sector (phase 2)
Hampstead
Line segment between Saraguay and Hampstead substations
The proposed optimized line route will run along the periphery of the city of Hampstead. It will cross Canadian Pacific (CP) property over approximately 1 km.
Map showing the line section to be replaced near Hampstead
Côte‑Saint‑Luc
Phase 1: Line segment between Saraguay and Hampstead substations
An overhead transmission line operated at 120 kV is currently located in the right‑of‑way. It will be dismantled and rebuilt at 315 kV. The exact route of this segment in Côte‑Saint‑Luc is being studied in an effort to optimize its path on Canadian Pacific (CP) property.
Phase 1: Hampstead substation
When the reconstruction work is completed, the facilities will be renamed Côte‑Saint‑Luc substation.
Hampstead substation is located in a mixed residential and institutional area, along a railway line. Commissioned in 1955, it supplies homes, businesses and industrial operations in Côte‑Saint‑Luc, Hampstead, Montréal‑Ouest and Côte‑des‑Neiges‑Notre‑Dame‑de‑Grâce.
Hydro‑Québec will build a substation with two buildings that will house almost all the equipment. Landscaping will be carried out at the end of the project.
Phase 2: Line segment between Hampstead and Rockfield substations
Phase 2 covers the segment south of Hampstead substation. An overhead transmission line operated at 120 kV is currently located in the right‑of‑way. It will be dismantled and rebuilt at 315 kV on the same route.
Map showing the line section to be replaced in Côte Saint‑Luc
Montréal‑Ouest
Line segment between Hampstead and Rockfield substations
An overhead transmission line operated at 120 kV is currently located in the right‑of‑way. It will be dismantled and rebuilt at 315 kV along a route that is slightly further away from adjacent properties.
Map showing the line section to be replaced in Montréal‑Ouest
Lachine
Phase 2: Line segment between Hampstead and Rockfield substations
An overhead transmission line operated at 120 kV is currently located in the right-of-way. It will be dismantled and rebuilt at 315 kV on the same route.
Phase 2: Rockfield substation
Rockfield substation is located in an industrial area. Commissioned in 1947, it supplies homes, businesses and industrial operations in Lachine, LaSalle and Montréal‑Ouest.
The 315‑kV substation will be expanded on the neighbouring property reserved for this purpose, and the control building will have a modern architectural style. The design and colours were approved by the Comité consultatif d’urbanisme (CCU) of Lachine.
Phase 3: Line segment between Rockfield and Aqueduc substations
An overhead transmission line operated at 120 kV is currently located in the right‑of‑way. It will be dismantled and rebuilt at 315 kV on the same route.
Map showing the line section to be replaced in Lachine
Lasalle
Phase 3: Line segment between Rockfield and Aqueduc substations
An overhead transmission line operated at 120 kV is currently located in the right‑of‑way. It will be dismantled and rebuilt at 315 kV on the same routein the third stage of the project.
Phase 3: Aqueduc substation
The line to be converted to 315 kV ends at Aqueduc substation. Currently operating at 315 kV, the substation will be renovated so the new line can be integrated. The work will include the relocation of the towers outside the substation and of the equipment inside the substation.
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