Bellechasse Transport Center - Société de transport de Montréal

Client : Société de transport de Montréal (STM)
Awards :

​​​The Bellechasse Transport Center is an exceptional project for both its outstanding design and its innovative approach to urban integration. The building has a 120 m (394 ft) by 180 m (591 ft) footprint and elegantly conceals the maintenance and operations of the Société de Transport de Montréal’s buses. Functional and distinctive, the Bellechasse Transport Center will be the first multi-level center in Canada and the first in North America to be completely underground. Fitted out with the necessary equipment to operate a complete fleet of 100% electric buses, it will receive a significant portion of the STM’s 300 hybrid buses starting in January 2022.

TECHNICAL CHALLENGES (Main Building Superstructure by SNC-Lavalin | Circular Ramps and Excavation by ELEMA) :

  • Excavation of the building footprint to a depth of 20 m (66 ft), including 18 m (59 ft) in a non-fractured rock of excellent quality.
  • Complex geometry accommodating circular bus ramps.
  • Imposing steel structure designed for heavy electric buses loads.
  • Steel structure transferring a circular column pattern to an orthogonal grid.


  • Rock excavation strategy to take advantage of building boundaries in relation to the lot limit
  • BIM integration for all disciplines including the site excavation 
  • Steel transfer structure for circular ramps to support floor loads and provide adequate clearance for vehicles


Please visit this link on our Facebook page for site photos...

To visit the project on Google Street View…

To visit the Bellechasse Transport Center website...

** Project in collaboration with SNC-Lavalin


  • Ramp-1
  • Ramp-2
  • Ramp-3
  • Dynamitage 1
  • Dynamitage 2
  • Dynamitage 3
  • STM-1
  • STM-2
  • Coupe 1
  • Coupe 2