Bercy mechanical ventilation station

March 23, 2020

COVID-19 - STM construction sites closed until further notice

Following the announcement made by the Government of Quebec on March 23, the STM’s construction sites will be closed until further notice. We will inform you when operations start up again.

Closing construction sites does not affect the bus and métro service. The STM’s priority is to ensure continuity of service, while following public health recommendations.

Construction of the Bercy mechanical ventilation station

Project summary

As part of our program to refurbish métro infrastructure, we will be starting construction on the Bercy mechanical ventilation station located on Bercy Street, between Hochelaga and Rouen streets, at the end of March 2020.

There is already a station on Hogan Street. Built during the second half of the 1960s, the station has now reached the end of its service life and must be replaced. Our project involves building a new, quieter and more efficient ventilation station that meets the new safety standards and complies with City of Montréal noise by-laws.

Duration of the work: March 2020 to summer 2023

Description of the work: Construction of a new mechanical ventilation station

Impact on métro service: No

Impact on bus service: No

Impact on customer trips

The project has no impact on customer trips.

Impact on local residents

Access to Hochelaga Street from Bercy Street will be blocked.

Access to the residences will be maintained at all times.

1. Preparation of worksite
Fencing off the worksite
Setting up the worksite and installing equipment

2. Excavation at ground level

3. Excavation in the rock bed
Micro-blasting will be required to break into the rock bed.

4. Installation of a membrane to ensure watertightness of all infrastructures

5. Concrete work for ventilation station
Concrete work for all infrastructures

6. Installation of mechanical and electrical equipment, as well as architectural finishes and exterior design
Delivery of equipment to worksite
Installation of equipment
Performance testing on mechanical equipment
Construction of ventilation station’s external structure

  • Any construction work likely to generate noise will be scheduled between 7 a.m. and 7 p.m., Monday to Saturday, in accordance with municipal regulations. While the major part of the work will take place Monday through Friday, it may be necessary for it to continue on Saturdays and possibly, but more rarely, on Sundays in order to meet the project deadline. Should this happen, weekend work will be announced in the Works section of the STM’s website and an electronic newsletter will be sent out to subscribers.
  • When possible, electric cranes and compressors will be used to reduce noise and CO₂ emissions.
  • Excavation work will produce vibrations that may be felt by residents living next to the worksite. We have hired an independent consulting firm to survey (photographs) the buildings located within a 50-metre radius of the worksite. The inspections will serve to document the condition of buildings before and after construction. In the unlikely event that any damage is reported, an expert opinion could help determine whether the damage is the result of the vibrations produced by the project.
  • A traffic and signage plan was prepared by a specialized firm and coordinated with the Ville-Marie borough and the City of Montréal. The plan will minimize the impact of the project on vehicle, cyclist, pedestrian and emergency services movements.

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 decibels, even when the ventilation station is operating at full capacity, which is unusual. The station’s noise level will be comparable to that of a household dishwasher. In fact, it will be so low that normal conversation or ambient noise could easily cover it.

Impact on traffic

  • Only local traffic will be allowed in both directions on Bercy Street, between the worksite and Rouen Street.
  • Flag persons will be present at the worksite when trucks enter or exit and at the intersection of Bercy and Rouen when students arrive at or leave Saint-Anselme School. A crossing guard will also be present, as usual.
  • Parking spots located in the worksite will be removed during the work.
  • A traffic light will be added at the corner of Bercy and de Rouen.

Neighbourhood map

Neighbourhood map


We are aware of the inconvenience that this work might cause. Rest assured that we will do whatever we can to minimize its impact on you.

Learn more about the project

A mechanical ventilation station is an infrastructure located between two métro stations 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 60,000 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.

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.

Contenu de l'onglet 5

Stay Informed! :

Stay informed of the project’s progress and other events by signing up for the electronic newsletter.

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

Top of page