Richelieu mechanical ventilation station

Construction of the Richelieu mechanical ventilation station

Project summary

As part of our program to refurbish our métro facilities and equipment, a new mechanical ventilation station is planned for the corner of Richelieu and Sainte-Marguerite.

The current station is located on the next lot over. Our project involves building a new, quieter and more efficient ventilation station. It will meet the new safety standards and will also comply with City of Montréal noise by-laws.

Redesign

The new building will be built further back from the road and designed to blend in with the rest of the neighbourhood’s architecture. There will be a new green space between the road and the MVS, and shrubs will be planted around the building.

Duration of the work: 

Preparatory work : August 8, 2022 to october 2022

Construction of the new mechanical ventilation station : fall 2023 to fall 2026

Métro impacts: No

Bus impacts: No

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Worksite update - October 2022

End of Phase 1

Preparatory work for the construction of the Richelieu mechanical ventilation station (MVS), which began in August 2022, will end the week of October 10, 2022.

This first phase of the project mainly involved decontaminating the soil by excavating the top layer and demolishing an empty building located within the work area.

Phase 2: fall 2023

The second phase, which will involve actually building the new Richelieu MVS, will begin in fall 2023. For now, a green space with different types of vegetation will be set up at the project site until the work resumes.

Car traffic

During Phase 1, the direction of traffic on Sainte-Marguerite Street was reversed to run southbound between De Richelieu and Saint-Antoine. The street will now revert to the northbound direction.

Street parking

To accommodate worksite truck traffic, street parking was closed on some sections of Saint-Ferdinand, De Richelieu and Sainte-Marguerite streets. Now that Phase 1 is over, the worksite will no longer require parking restrictions in the area.

Learn more about the project

A mechanical ventilation station is an infrastructure that is equipped with two fans designed to extract hot air from the métro network through inlets fitted with air vents. Ventilation stations built for the original métro network extract around 160,000 cubic feet of air per minute, while the new ventilation systems extract around 240,000 cubic feet per minute. Huge noise suppressors mitigate the noise from these fans to ensure quiet for residents living close to a ventilation station.

Mechanical ventilation stations serve three essential purposes:

Comfort ventilation
Regulates the ambient temperature and supplies fresh air for transit users by exchanging air from the outside with air inside the métro network.

Night-time ventilation
Ensures a supply of fresh air for night workers carrying out routine maintenance.

Emergency ventilation
In the event of an incident, controls smoke and provides a safe evacuation route for passengers via the nearest métro station and ensures unobstructed access for emergency first responders.

This project will be completed in several phases:

  1. Worksite preparation
    1. Fencing off the worksite
    2. Demolishing the existing building and fully decontaminating the area
    3. Installing underground infrastructure and fill
  2. Ground-level excavation
    1. Fencing off the worksite
    2. Setting up the worksite and installing equipment
    3. Conducting ground-level MVS shaft excavation
  3. Bedrock excavation
    1. Open-cut ventilation shaft excavation
    2. Underground ventilation tunnel excavation
    3. Micro-blasting may be required for excavation in the rock bed, but other options will be assessed with the general contractor
  4.  Installation of a membrane to ensure watertightness of all infrastructures
  5. Concrete work for ventilation station
    1. Concrete work for all infrastructures
  6. Installation of mechanical and electrical equipment, as well as architectural finishes and exterior design
    1. Delivery of equipment to worksite
    2. Installation of equipment
    3. Performance testing on mechanical equipment
    4. Construction of ventilation station’s external structure

Impact on local residents

Texte important

Worksite update - October 2022

End of Phase 1

Preparatory work for the construction of the Richelieu mechanical ventilation station (MVS), which began in August 2022, will end the week of October 10, 2022.

This first phase of the project mainly involved decontaminating the soil by excavating the top layer and demolishing an empty building located within the work area.

Phase 2: fall 2023

The second phase, which will involve actually building the new Richelieu MVS, will begin in fall 2023. For now, a green space with different types of vegetation will be set up at the project site until the work resumes.

Car traffic

During Phase 1, the direction of traffic on Sainte-Marguerite Street was reversed to run southbound between De Richelieu and Saint-Antoine. The street will now revert to the northbound direction.

Street parking

To accommodate worksite truck traffic, street parking was closed on some sections of Saint-Ferdinand, De Richelieu and Sainte-Marguerite streets. Now that Phase 1 is over, the worksite will no longer require parking restrictions in the area.

Phase 1 – Preparatory work : August 8, 2022 to October 2022

Before building the new MVS, we must demolish an empty building currently located on site. The next step will be excavating the top layer of soil. This first phase of worksite preparation will be completed in October 2022.

Temporary landscaping and greening will also be done in October after which the project will be inactive until fall 2023. 

Impact on traffic

During the work, the direction of traffic on Sainte-Marguerite Street will be reversed to run southbound between de Richelieu and Saint-Antoine.

This change will allow work trucks to leave the site more safely, due to the traffic light at Sainte-Marguerite and Saint-Antoine.

Street parking

To accommodate truck traffic on the worksite, street parking will be closed on some sections of Saint-Ferdinand, De Richelieu and Sainte-Marguerite streets near the work area. Keep an eye out for signage on site starting August 8.

Excavation and soil decontamination

During the first phase, teams will use power shovels to excavate the top layer of soil. In compliance with environmental standards, they will remove any contaminated soil and transport it offsite by truck to be replaced with non-contaminated soil.

Dust

Anti-dust sheets will be installed on the worksite partitions and trucks will be cleaned before leaving the site. Nearby streets will also be cleaned regularly during the work.

Schedule

The work will be carried out according to the schedule authorized by municipal by-laws, from 7:00 a.m. to 7:00 p.m. on weekdays.

Phase 2 – Construction of the mechanical ventilation station : fall 2023 to fall 2026

In the second phase, teams will begin by excavating the bedrock at the site of the new MVS. They will then install a waterproofing membrane and begin concrete work on the building. Next, mechanical and electrical equipment will be installed inside the MVS, and the project will conclude with final architectural work and landscaping.

Excavation

The excavation required during this phase of the work will generate occasional vibrations that may be felt by residents near the worksite. An independent consulting firm will survey (photograph) all buildings around the work site. These inspections will document the condition of the buildings before and after construction. In the unlikely event that any damage is reported, an expert opinion will help to determine whether the damage is the result of the vibrations produced by the work site. Property owners affected by this measure will be contacted before the worksite opens.

Public consultation and good neighbour committee

Public consultation

Before the start of the work, an independent public consultation process was held to give the community a chance to provide feedback on the new project. For more information or to read the report and action plan created in response to the consultation, please visit the public consultation web page.

Good neighbour committee
The committee will allow residents living near the site to meet periodically with the people in charge of the project to receive up-to-date information and discuss their concerns during the work. 

Frequently Asked Questions

The worksite is a considerable size. We have to dig into the rock bed to create a vertical shaft to a depth of 21 metres. We will then excavate a 92-metre tunnel, removing a total of 9820 cubic metres of bedrock from the site. After that, we will install a waterproofing membrane over the tunnel to protect it from water infiltrations. Next comes the concrete, which will form the tunnel and underground building. Finally, fans and their accompanying electrical equipment will be installed. All of these steps vary in terms of duration and impact, such as noise and dust.

No. Essentially, a mechanical ventilation station exchanges the air inside the métro that transit users breathe with outside air, ensuring a constant supply of fresh air.

There are no contaminants in a mechanical ventilation station. Rainwater or snow falling into the ventilation shaft will be collected by the métro’s water-pumping system and released into the municipal sewage system, as is currently done throughout the métro network.

Once the ventilation station is operational, the noise it emits will comply with municipal by-laws. The fans are installed below ground level and equipped with powerful noise suppressors. The noise level outside the building will not exceed 50 decibelsl. The station’s noise level will be comparable to that of a household dishwasher. 

 

This work is made possible through funding from the Ministère des Transports du Québec.

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