Construction Update

Reinforcement struts at Rideau Station west entrance - Traverses de renfort à l’entrée ouest de la station Rideau

Central Stations

Update on Rideau Street infrastructure failure:

Repair crews continue working on affected services in the area of the infrastructure failure. Repairs to the sanitary and storm sewer pipes are substantively complete. The next steps will involve backfilling the site to the level of the watermain pipes and allowing crews to begin reinstating the water main.

Pumping continues to remove water from the tunnel and is being treated before being directed into the sanitary sewer system for full treatment at the City’s wastewater treatment plant.

All but only a handful of businesses in the area are up and running with full utilities.

For regular updates on reinstatement work, please visit

Traffic restrictions in the area remain in place to help facilitate repair efforts and for the safety of work crews.

Here you see Rideau Station west entrance, where struts have been installed to reinforce the site following the June 8th road collapse. Further construction has been suspended.

Parliament Station west entrance decorative hoarding installed - Une palissade décorative est installée à l'entrée ouest de la station Parlement

Central Stations

Rideau Station cavern: the station begins to take shape as crews continue installing rebar and pouring concrete.

At the East Portal, mobilization for piling occurs overnight as part of reinforcement work in preparation for future guideway construction.

Rideau Station east entrance: station construction progresses as crews waterproof, install mechanical pipes and pour concrete.

Lyon Station cavern: the station concourse level continues to take shape as crews install formwork and rebar, and pour concrete for the deck. At the West Portal, crews mobilize to prepare for crane installation, and excavate the ramp and install reinforcements as part of preliminary guideway work.

Lyon Station west entrance: entrance excavation is ongoing and includes blasting, hoe ramming and material removals. West and east vent shaft work continues and includes material removals and utility relocations.

Lyon Station east entrance: crews prepare for future concrete work and structural steel installation on the station concourse level. Crews install formwork for the elevator walls, escalator pits and station adit wall.

Here you see Parliament Station west entrance, where decorative hoarding has been installed. At the station entrance, crews complete falsework, install rebar and pour concrete for the slab as part station of foundation work. Crews also pour concrete for the station stairs.

Parliament Station cavern: crews waterproof the station in preparation for pouring of the arch final lining. Crews install rebar for the station elevator pit.

Caisson installation at Bayview Station - Installation de caissons à la station Bayview

West Stations

Here you see Bayview Station, where preliminary station work continues this week with caisson drilling and pouring. MUP users at Bayview may experience short term closures during lifting operations at Bayview Station.

Tunney’s Pasture Station: crews continue working in the temporary bus loop area in preparation for the June 24 West Transitway Service Adjustment. Activities include electrical installations for the supervisors’ building and construction of the wall next to the Transitway.

Pimisi Station: excavation and material removals occur in preparation for future station foundation work.

Crews continue excavation at uOttawa - Les équipes continuent l'excavation au station uOttawa

East Stations

Here you see uOttawa Station,where crews continue excavating and installing reinforcements, part of initial station work. Demolition of the uOttawa pedestrian tunnel is ongoing.

Lees Station: demolition and material removals continue in preparation for station foundation work.

Closure of Transitway pedestrian access from Lees to uOttawa stations.

Hurdman Station foundation work including rebar and concrete. - Travaux de fondation à la station Hurdman y compris les barres d’armature et le béton

East Stations

Here you see Hurdman Station, where construction of the station foundation continues; activities include rebar installation, concrete pours and installation of grade beams. Bus loop construction progresses as crews excavate and complete grading and electrical work. At the bus operators’ building, activities include backfilling and pouring concrete walls in preparation for future masonry work.


Tremblay Station: the station continues to take shape as crews backfill the platform area, pour concrete for the station walls and install structural steel. Work on the sanitary connection is completed.


Track slab ready for dowels at St-Laurent Station - Assiette des voies ferrées prête pour les goujons à la station St-Laurent

East Stations

Here you see St-Laurent Station, where station utility work is ongoing as crews continue plumbing, duct bank installation and trenching for the sanitary line. Pouring begins for the concrete slab in the electrical room. Crews begin coring the track slab in preparation for dowel installation, part of station trackwork.

Cyrville Station: station construction progresses as crews install structural steel, the metal roof deck and falsework for the stations’ second floor and concourse levels. Work on the TPSS, the structure which will power the vehicles, continues and includes wiring.

Blair Station: the station continues taking shape as crews finalize structural steel and metal roof deck installations. Utility installations such as plumbing and electrical work continue inside the station building. Crews install motors for the station elevators and backfill the electrical room.

Tunnel Excavation and Support

Running tunnel east of Parliament Station: excavation in the running tunnel has been suspended due to the June 8th road collapse at Rideau Street near Sussex Drive. For regular updates on reinstatement work, please visit

Grading on guideway moving west from Preston Street- Nivellement de la voie de guidage vers l’ouest à partir de la rue Preston

Guideway – Bayview CPR Bridge to Preston Street

Bayview CPR Bridge to Preston Street: work on this section of the guideway begins with fence installation, grading and preliminary excavation moving west.


Ballast installation on the guideway east of Tremblay Station - Installation des ballasts sur la voie de guidage à l'est de la station Tremblay

Guideway – East Portal to Rideau River Transitway Bridge, Hurdman and  Belfast Yard to Blair Station

East Portal to Rideau River Transitway Bridge: guideway construction continues with sewer works, OCS foundations and duct bank installations.

Hurdman Station Elevated Guideway: the elevated guideway platform continues to take shape as crews install formwork and pour concrete.

Here you see ballast installation on the guideway east of Tremblay Station, where crews prepare to pull tracks.

St-Laurent Station to Blair Station: trackwork continues with tamping and thermite welding, in preparation for vehicle testing as early as fall.

Concrete pours complete at Booth Street Bridge - Coulage du béton terminé au pont de la rue Booth

Other Activities

Here you see Booth Street Bridge, which is taking shape as crews complete concrete pours for the parapet walls and begin work on the bridge’s approach slab.

CPR Bridge near Bayview Station: bridge renewal continues as crews install caissons and pour concrete.

Upcoming Construction Activities

In the coming weeks, the following construction activities are scheduled to occur:

  • Tunney’s Pasture Station construction.
  • Bayview Station construction.
  • Bayview Bridge renewal.
  • Final concrete work in Parliament Station cavern.
  • Mann Avenue Bridge rehabilitation.
  • Watermain work near St-Laurent Station, along the guideway.
  • TPSS deliveries along the alignment.
  • Bus operators’ building construction and catch basin/landscaping work at Blair Station.