Construction Update

Formwork and rebar installations on L-walls in Lyon Station cavern - Installation du coffrage et des barres d'armature dans la station Lyon.

Lyon Station

In Lyon Station cavern, crews install drainage, rebar and formwork for the L-walls, and pour concrete for the foundation slab.

In the running tunnel between Lyon and Parliament stations, crews complete rebar installation and begin pouring concrete as part of tunnel arch final lining work.

Crews spray shotcrete as part of support activities in Parliament Station cavern - Application de béton projeté dans l’espace souterrain de la station Parlement

Parliament Station

In Parliament Station cavern, Jawbreaker continues mining the south bench. In the running tunnel, excavation continues east, along with tunnel support activities such as rock bolt installation and shotcrete.

Excavation progress in Rideau Station cavern - Avancement des travaux d’excavation dans l’espace souterrain de la station Rideau

Rideau Station

In Rideau Station cavern, Crocodile Rouge continues to excavate the central pillar.

Excavation at Rideau Station west entrance - Excavation à l'entrée ouest de la station Rideau

Downtown Integrated Stations and Entrances – Lyon, Parliament and Rideau Stations

Lyon Station west entrance: crews continue hoe ramming operations and begin drilling rock bolts as part of support activities. At the HVAC shaft, hoe ramming and excavation occur. At the west vent shaft, hoarding installation continues, along with piling.

Lyon Station east entrance: crews install rebar and pour columns. Mechanical work also continues.

Parliament Station west entrance: on the ground level, crews install rebar, formwork and pour beams for the stairs. At the parking levels, crews continue to install rebar and formwork as part of escalator work.

Parliament Station east entrance: demolition and removals occur. At the concourse level, crews pour concrete piers and complete column reinforcement.

Traffic restrictions on Queen and O’Connor streets switch to the west side of O’Connor Street.  


Rideau Station east entrance: hoe ramming and material removals are ongoing.

Rideau Station west entrance: crews continue excavating and installing wire mesh and shotcrete. Piling and shoring activities are ongoing on the north side of Rideau Street, part of west vent shaft work.


Traffic restrictions on Rideau Street remain in effect.

Walls are going up at Tremblay Station - Érection des murs de la station Tremblay

Tunney’s Pasture, Pimisi, Hurdman, Tremblay, St-Laurent, Cyrville and Blair Stations

Tunney’s Pasture Station: crews continue mobilizing and begin excavating, part of temporary bus loop construction.

Pimisi Station: initial mobilization continues, along with excavation.

Hurdman Station: crews begin installing the mud slab for grade beams and continue excavating. Underground electrical and plumbing installations are ongoing as part of station and permanent bus loop construction.

Tremblay Station: crews pour the walls, footings and stairwell, install rebar on the platform walls and continue rough-ins and plumbing work. Crews install granular at the west ring road at VIA Rail Station.

St-Laurent Station: crews finalize formwork for the suspended slab and begin pouring grade beams and slabs. Work on the plenum, backfilling, excavation and rebar installations continue.

Cyrville Station: crews continue installing structural steel, forming stairs and pouring walls at
Cyrville Bridge.

Blair Station: structural steel installation, waterproofing, backfilling and platform pours are ongoing. Crews remove the RSS wall.

Crews complete formwork and prepare to pour the deck at the Booth Street Bridge - Des équipes terminent les travaux de coffrage et se préparent à couler le tablier du pont de la rue Booth.

Guideway– Booth Street Bridge, uOttawa, Tremblay, Hurdman Station

Booth Street Bridge: crews begin preparations to pour the deck.

uOttawa Station: Investigative probe work occurs this week on Mann Avenue.

Hurdman Station Elevated Guideway: crews begin preliminary work to form the deck.

Tremblay Station: crews strip the formwork and begin RSS wall construction along the D-Ring road east at VIA Rail Station.

Upcoming Construction Activities

The following construction activities are scheduled to occur:

In the coming weeks:

  • Watermain work near St-Laurent Station.

In the coming months:

  • Tunney’s Pasture Station construction.
  • Bayview Station preliminary construction.
  • Pimisi Station construction.
  • Excavation of the ramp at West Portal.
  • Transitway service adjustment from Lees to Laurier stations.
  • uOttawa Station construction.
  • Mann Avenue Bridge rehabilitation.
  • Lees Station construction.
  • Guideway and trackwork along the alignment.