Construction Update

Rebar installation in preparation for concrete pours at Rideau Station east entrance - - Installation des barres d’armature en préparation du coulage du béton à l’entrée de la station Rideau est

Central Stations

Update on Rideau Street infrastructure failure:

Recovery efforts continue.

Enbridge has completed its repairs. Work has been substantively completed on the watermain repairs.

The two remaining affected utilities, Hydro Ottawa and Bell Canada, are scheduled to start work in the sinkhole as soon as the latest round of backfilling is complete.

Construction at Rideau Station west entrance has resumed.

For regular updates on reinstatement of work and road closures, please visit

Rideau Station cavern: the station framework continues taking shape as crews waterproof, install rebar and girders, and pour concrete. At the East Portal ramp, sheet piling occurs overnight and continues for the next several weeks in preparation for future guideway work.

Here you see Rideau Station east entrance, where the station entrance continues taking shape as crews waterproof, install steel and pour concrete as part of ongoing station foundation work.

Material removals at Lyon Station west entrance - Enlèvement des matériaux excavés à l'entrée ouest de la station Lyon

Lyon Station cavern: work continues on the station concourse level as crews install rebar and formwork in preparation for future concrete pours. Additionally, the next phase of station final lining work gets underway as crews mobilize to begin arch final lining. At the West Portal ramp, crews excavate and install reinforcements. By the end of the week,
Crocodile Rouge arrives at West Portal to prepare to mine the ramp in the coming weeks.

Here you see Lyon Station west entrance, where crews continue station excavation. Activities include final blasting, hoe ramming and material removals. At the west vent shaft, minor rock removal takes place over the next several weeks in anticipation of further rock removal later in the summer to integrate shaft with underground station. At the east vent shaft, storm and sanitary temporary relocations will commence shortly to allow for further soft ground excavation.

Lyon Station east entrance: the station begins to take shape as crews install formwork and rebar in preparation for concrete work on the concourse level, as well as for the elevator pits.

Parliament Station cavern: crews continue station construction including final waterproofing and pouring slabs and concrete for the L-walls.

Parliament Station west entrance: crews install rebar, formwork and pour concrete as part of work on the station stairs and foundation.

Parliament Station east entrance: the station concourse level progresses as crews install structural steel and columns. Concrete pours for the station stairs are ongoing.

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

Decorative hoarding at uOttawa Station - Palissade décorative à la station uOttawa

Here you see uOttawa Station, where initial station construction occurs as crews excavate, install reinforcements, work on the mud slab and finalize demolition of sections of the pedestrian tunnel.

Final works at the Tunney’s Pasture temporary bus loop - Derniers travaux dans la zone d’embarquement temporaire de Tunney's Pasture

West Stations


Here you see Tunney’s Pasture Station, where crews complete final works at the Tunney’s Pasture temporary bus loop in preparation for the June 24 Transitway service adjustment. Activities include electrical work, grading, backfilling and pouring the concrete bus pad on Holland Avenue.


Bayview Station: station foundation work is ongoing as crews drill and pour caissons. Pathway users at Bayview may experience short-term closures during lifting operations at
Bayview Station.


Pimisi Station: crews excavate, remove materials and mobilize to begin work on station footings.

Lees Station removals - Enlèvement des matériaux excavés à la station Lees

East Stations

Here you see Lees Station, where crews finalize demolition of the existing structures and mobilize to begin installing caissons as part of station foundation work.

Closure of Transitway pedestrian access from Lees to uOttawa stations.

Hurdman Station: crews continue installing grade beams and pouring concrete as part of station foundation work. Excavation, grading and electrical work are ongoing as part of permanent bus loop construction. At the bus operators’ building, crews continue foundation work including backfilling and pouring concrete walls.

Tremblay Station: the station continues to progress and activities include installing structural steel, completing station walls, pouring footings on the north side and backfilling in the platform area. Electrical installations are ongoing.

St-Laurent Station: crews continue plumbing, installing duct banks and trenching for the sanitary line as part of station utility work. Backfilling is ongoing in preparation for future structural steel work. Crews pour concrete for the electrical room.

Cyrville Station: the station continues to take shape as crews install falsework in preparation for concourse level concrete pours. Structural steel installation occurs overnight. Electrical work for the TPSS, the structure which will power the vehicles, is ongoing. Utility installations have begun as part of work on the auxiliary building.

Here you see Blair Station: station utility work continues and includes plumbing, electrical work and preparations to install catch basins. Crews finalize the station’s metal roof deck, pour concrete, install structural steel and work on the station’s elevators.

Hurdman Station guideway grading and removals - Nivellement et enlèvement des matériaux excavés sur la voie de guidage de la station Hurdman

Guideway – Bayview CPR Bridge to Preston Street, East of uOttawa Station to Rideau River Transitway Bridge, Rideau River Transitway Bridge to east of Hurdman Station and Belfast Yard to Blair Station

Bayview CPR Bridge to Preston Street: preliminary guideway work continues moving west; activities include excavation, asphalt removals and grading.

East of uOttawa Station to Rideau River Transitway Bridge: crews complete duct bank installations, mobilize for OCS pole foundation installations and continue sewer work.

Rideau River Transitway Bridge to east of Hurdman Station: crews begin initial guideway work including backfilling and asphalt removals.

Here you see the Hurdman Station Elevated Guideway, where progress is visible as crews pour the north platform deck.

Belfast Yard to Tremblay Station: crews continue installing ballast and pulling rail to prepare for vehicle testing as early as fall.

St-Laurent Station to Blair Station: trackwork continues on this portion of the guideway including thermite welding, in preparation for vehicle testing as early as fall.

Work on the Booth Street Bridge approach slab - Travaux sur la dalle d'approche du pont de la rue Booth

Other Activities

CPR Bridge near Bayview Station: bridge renewal work is ongoing and includes demolition of the bridge pier. During lifting operations currently underway as part of Bayview Station work and for the safety of all Bayview pathway users, short-term closures will be required. Flaggers are onsite to assist.

Here you see the Booth Street Bridge, which continues taking shape as crews pour concrete for the parapets walls and install rebar for the bridge’s approach slabs.

Upcoming Construction Activities

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

  • Tunney’s Pasture Station construction.
  • Bayview Station construction.
  • Blasting at Parliament Station east entrance.
  • 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.