Construction Update

Crews waterproof the transition east of Lyon Station - Les équipes imperméabilisent la transition à l'est de la station Lyon.

Lyon Station

In Lyon Station cavern, crews waterproof the station arch, install rebar and pour the mudslab. In the transition east of Lyon Station cavern, waterproofing and concrete work continue. At West Portal, crews begin initial preparations to excavate the ramp to accommodate future guideway and trackwork.

Excavation in Parliament Station cavern - Excavation de l'espace souterrain de la station Parlement.

Parliament Station

In Parliament Station cavern, excavation of the bench continues. In the last section of running tunnel east of Parliament Station, mining continues east toward Rideau Station cavern. Shotcrete and rockbolt installations are ongoing along the tunnel.

Mining the central pillar in Rideau Station cavern - Excavation du pilier central dans l'espace souterrain. de la station Rideau

Rideau Station

In Rideau Station cavern, Crocodile Rouge mines the final section of the central pillar. Cavern support activities such as shotcrete are ongoing.

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

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

Lyon Station west entrance: blasting continues following a breakthrough to the Lyon Station cavern adit. At the west vent shaft, tieback installations and excavation are ongoing. At the east vent shaft, piling crews mobilize.

Lyon Station east entrance: demolition of the slabs on the parking and concourse levels is ongoing. Crews continue plumbing and electrical work.

Traffic restrictions on Queen Street between Bay and Metcalfe streets begin April 24, 2016.

Parliament Station west entrance: on the parking level, crews pour the escalator wall and columns.

Parliament Station east entrance: crews install rebar, form new piers and reinforce columns.

Traffic restrictions on Queen and O’Connor streets remain in effect.

Rideau Station east entrance: crews waterproof and pour the mud slab. Excavators are removed from site at the end of the week.

Rideau Station west entrance: excavation is ongoing, along with support activities such as umbrella drilling and shotcrete. At the west vent shaft on the north side of Rideau Street, crews finalize shoring and concrete work.

Traffic restrictions on Rideau Street remain in effect.

Excavation for the Tunney’s Pasture Station temporary bus loop - Excavation pour la zone d’embarquement temporaire de la station Tunney's Pasture.

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

Tunney’s Pasture Station: backfilling and material removals occur as part of temporary bus loop work.

Pimisi Station: preliminary station excavation is ongoing.

Lees Station: crews mobilize to begin removing existing structures.

Hurdman Station: crews weld rebar and install grade beams as part of station work. Permanent bus loop work continues, including excavation and grading.

Tremblay Station: crews pour station footings and install duct banks. Concrete work occurs near the
west ring road.

St-Laurent Station: crews install grade beams, structural steel and continue backfilling. Plumbing and electrical work is ongoing.

Cyrville Station: crews continue installing the base for the integrated art. Electrical work, structural steel installation and work on the auxiliary building are ongoing.

Blair Station: Crews begin waterproofing and backfilling. Suspended slab pours are finalized and structural steel installation is ongoing. Crews continue construction of the RSS walls as part of permanent bus loop work.

Crews continue grading and install OCS foundations between Tremblay Station and Belfast Yard - Les équipes continuent de niveler et d'installer les fondations des poteaux entre la station Tremblay et la Cour Belfast.

Guideway Construction – Booth Street Bridge, Hurdman Station and Tremblay Station to Blair Stations

Booth Street Bridge: crews install formwork to prepare for concrete pours.

Transitway service adjustment from Lees to Laurier stations.

Hurdman Station Elevated Guideway: crews form the deck and install rebar.

Tremblay Station to Belfast Yard: crews begin pulling rail on the guideway between Tremblay Station and Belfast Yard. TPSS 6 was installed east of Tremblay Station and crews are preparing to install cabling. [Link – see TPSS ‘Did you know’]

St-Laurent Station to Blair Station: ballast installation and trackwork are ongoing.

Rebar and steel installations at Cyrville Station - Installation des barres d'armature et des structures d'acier à la station Cyrville.

Upcoming Construction Activities

The following construction activities are scheduled to occur:

  • In the coming weeks: Final waterproofing and concrete work in Parliament Station cavern.
  • Final waterproofing and concrete work in Rideau Station cavern.
  • Excavation of the ramp at East Portal.
  • uOttawa Station construction.
  • Mann Avenue Bridge rehabilitation.
  • Watermain work near St-Laurent Station, along the guideway.
  • Watermain relocation at Cyrville Station.
  • Bus operators’ building construction at Blair Station
  • In the coming months:
  • Tunney’s Pasture Station construction.
  • Bayview Station preliminary construction.
  • Pimisi Station construction.


Installation de la sous-station de traction à l'est de la station Tremblay.

Did you know? Another traction power substation (TPSS) has been delivered and installed east of Tremblay Station.

O-Train Confederation Line will include 9 substations, eight of which will be distributed evenly along the alignment corridor and one at Belfast Yard, to provide power to the yard tracks. Most of the substations will be aboveground, with an underground substation servicing the three underground stations. TPSS structures are approximately four metres high by five metres wide by 15 metres long. They convert electricity from the local power sources to the levels needed by the vehicles. The LRT will operate on 1500 volts of DC power.