Fullum mechanical ventilation station
Construction suspended for the summer
As planned, major work will be suspended as of the evening of June 21 and will resume on September 3 to allow local residents to enjoy the park during the summer. This means that no machinery will be in operation on the site. The fences surrounding the work site will remain in place for safety reasons. As always, trespassing on the work site is strictly forbidden.
Some site refurbishment work will be carried out at the very end of August, but no other excavation or construction activities will take place on the site.
As part of our program to refurbish métro infrastructure, we will begin building the Fullum mechanical ventilation station in Parc Olivier-Robert this fall.
The work will last about three years. According to the planned schedule, it will start on September 28, 2018 and be completed in spring 2021.
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For the construction of the Fullum mechanical ventilation station, we will use micro-blasting to break into the rock and perform the excavation work required to move the project forward. The micro-blasting has started in the week of April 29.
What measures will be implemented to ensure safety around the worksite?
- The construction site has already been fenced off, and the micro-blasting will be done within its perimeter.
- Blasting mats will be installed over the rock to contain the micro-blasts.
- Safety instructions will be posted around the site.
- No explosives are stored on site.
- A professional firm specialized in monitoring vibrations has been mandated to ensure compliance with the standards established by the City of Montréal and the STM.
- Carbon monoxide detectors have been installed in buildings within 100 metres from the site.
What is the usual procedure for warning nearby residents that a blast is imminent?
- 12 whistle or siren sounds
- 30-second wait
- One long whistle or siren sound
- End of blasting
We are planning on performing about three micro-blasts every six days. In general, the schedule will be as follows:
- Day 1: one micro-blast at the end of the day
- Day 2: one micro-blast in the morning and another at the end of the day
- Day 3 to day 6: no micro-blasting
Will residents feel vibrations and hear noise?
Close to the worksite, residents may feel vibrations or hear noise when the micro-blast goes off, which is totally normal.
Why can’t the excavation work be performed with machinery?
The hardness and nature of the rock determines whether micro-blasting is needed or not. When the rock is really hard, compact and large in size, it is very difficult to break it up using a method other than micro-blasting. Given its efficiency, this method will reduce the duration of the work.
No major work in the summer of 2019 and 2020
Major work will be suspended for eight weeks during the summer so that citizens can enjoy the park. The fences surrounding the work site, however, will remain in place for obvious safety reasons.
Safe access to Parc Olivier-Robert
Parc Olivier-Robert will be accessible via the entrance at the corner of Fullum and Olivier-Robert. A four-way stop will be installed at this intersection to ensure safe access to the park. Crossing the Fullum and De Maisonneuve intersection will be possible only from the west side of the street.
New park chalet built by the borough
The new mechanical ventilation station will be built next to the new park chalet. The two buildings were designed together to fit with one another.
A traffic plan will be implemented. The work site will have the following impacts:
- One parking lane will be removed on both De Maisonneuve and Fullum.
- Flaggers will be present when trucks enter or exit the work site on both De Maisonneuve and Fullum.
- Stop signs will be installed in both directions at Fullum and Olivier-Robert to ensure safe pedestrian access to the park.
- The traffic light located on the northeast corner of De Maisonneuve and Fullum will be moved but will remain in operation.
- The 34 – Sainte-Catherine bus stop will be removed. The closest bus stop will be at the corner of Dufresne.
- The bicycle path on Fullum will remain open.
- Any construction work likely to generate noise will be scheduled between 7 a.m. and 7 p.m. on weekdays. In accordance with municipal by-laws, some work may continue over the weekend to keep the construction on schedule. 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.
- The excavation work required for construction will generate vibrations that could be felt by residents living next to the work site. We have hired an independent consulting firm to survey (photograph) all buildings around the work site. These inspections will serve to document the condition of the buildings before and after construction. In the unlikely event that any damage is reported, an expert opinion could 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 notified accordingly.
- A traffic and signage plan has been 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 construction on car, cyclist, pedestrian and emergency vehicle traffic.
- Preparation of work site
Fencing off the work site
Setting up the work site and installing work equipment
- Excavation at ground level
- Excavation in the rock bed
Micro-blasting will be required to break into the rock bed. In this case, it is the fastest, most efficient way to proceed. Another option would have been jackhammering. However, given the volume of rock to be excavated, jackhammering would be less efficient, would take significantly more time, and be much more disruptive as the noise is constant.
- Installation of a membrane to ensure watertightness of all infrastructure
- Concrete work for ventilation station
Concrete work for all infrastructure
- Installation of mechanical and electrical equipment, as well as architectural finishes and landscaping
Delivery of equipment to work site
Installation of equipment
Performance testing on mechanical equipment
Construction of ventilation station’s external structure
No. Once the ventilation station is operational, the noise it emits will comply with municipal by-laws. Installed below ground, the ventilators are 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.
Mechanical ventilation stations serve three essential purposes:
Comfort ventilation: Regulates the ambient temperature for transit users by removing warm air inside the métro system.
Night-time ventilation: Supplies fresh air for night workers carrying out routine maintenance. These workers use diesel engine vehicles to get around, as the power supply to the tracks is cut off at night.
Emergency ventilation: In the event of an incident, allows for smoke control so that transit users can evacuate safely to the nearest métro station and emergency first responders can access the site with no obstructions.
Yes. There is an existing station on Poupart. 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, as well as City of Montréal noise by-laws.
No. Essentially, a mechanical ventilation station exchanges the air inside the métro that transit users breath with outside air, ensuring a constant supply of fresh air.
No. 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 system.
No. A mechanical ventilation station does not have the necessary infrastructure to be transformed into a métro station. No such plans have been made in this sense.
This work is made possible through funding from the ministère des Transports du Québec.