New mechanical ventilation station construction project As part of its program for refurbishing métro infrastructure, we are building a new mechanical ventilation station on the Orange line, between Square-Victoria and Place-d’Armes métro stations.
In cooperation with Ville-Marie borough and the city of Montréal, a traffic plan has been established for motorists and for active transport users in order to minimize the impact on traffic flow in the area. Click on the plan to enlarge Do you want to avoid traffic jams? Plan your trip and ride public transit.
For those arriving from the north-end of the island to access Highway 10:
Preparation of the work site
Mechanical ventilation station excavation Surface excavation
Main equipment used:
Concrete work for well and gallery construction
Installation of mechanical and electrical equipment
Architectural finishes and landscaping
The métro ventilation system has three functions:
From outside, the building appears to be modestly-sized. Inside, a tunnel links the shaft to the metro tunnel. In that tunnel are two large fan units along with noise-dampening walls.
The metro network currently has 89 mechanical ventilation stations. Ventilation units are required between each metro station.
Yes, the project consists in replacing the old mechanical ventilation station built around 1966 and located at 303 Viger St. West. The new station will be built on a small section of the parking lot next to 425 Viger St. More efficient, the unit will conform to new safety standards, while improving the supply of fresh air for commuters and metro employees.
In order to meet current safety standards and the City of Montréal’s noise by-laws, the ventilation station would need to be significantly expanded. And because the current unit is integrated into another building’s main floor, using the same site was impossible. The parking lot was selected after an in-depth analysis of four potential sites. Also, the nearby Highway 720 tunnel south of Viger St. makes it impossible to build on that side. A ventilation station must also be located next to the métro tunnel, about halfway between the two metro stations it serves.
Working with city officials, we made sure the proposed building would fit in the neighbourhood. The building will be about 9 metres tall and about 5 metres wide. The building is shown in the sketch above.
Construction work should take about 21 months, with start-up planned for fall 2012
Any construction work likely to produce noise will be restricted to between 7 a.m. and 7 p.m. Monday to Friday. However, adhering to the project's calendar for construction may require workers to do overtime on weekdays and/or weekends. Any additional worktime will comply with municipal regulations. During construction, an independent outside firm will supervise excavation work. This firm will ensure that strict standards established by the City of Montréal and the STM regarding vibrations caused during excavation are respected. Seismographs will be installed in strategic areas to measure vibrations. A traffic impact study will help establish an optimal plan for cars and active means of transportation. A traffic plan will be prepared in collaboration with the Borough. As with any construction site, there might also be dust on occasion. Measures will be taken should it become a problem.
No, a ventilation station produces no contaminants. Rainwater or snow falling into the ventilation shaft will be collected by the métro pumping system and released into the municipal sewage system.
No. These ventilation units are equipped with powerful noise suppressors. Once operational, noise emissions will comply with municipal regulations. The noise level around the structure will not exceed 50 decibels when both units are operating together at full capacity (an exceptional situation). That noise level is so low that it cannot be heard over a normal conversation or normal ambient noise in the area. The units will be installed under Hermine St, one 9 metres and the other 15 metres below ground.
No. A mechanical ventilation station with its equipment cannot be transformed into a métro station entrance.