Construction Summary
Week of May 25
Central Segment
Tunnel
West Portal (Jawbreaker)
- The roadheader continues excavating the full face of the Lyon Station Cavern in drifts[i], under Queen Street and Lyon Street.
- Mining progresses in drifts.
- Drilling of the support umbrella and shotcreting continues.
Central Shaft (Chewrocka)
Installation of the second umbrella of Parliament Station cavern was completed. The roadheader continues excavating the pillar section under the umbrella at the station cavern, which will be followed by a return to the running tunnel to complete the bench[ii]. Once the bench is mined, the mud slab will be poured. These activities will continue for the coming weeks.
Tunneling in the central shaft
Huge photo here:

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East Portal (Crocodile Rouge)
- Installation of tunnel support continues as the roadheader progresses north to Laurier Street.
- Twenty-four hour tunneling advances in the full tunnel face.
For weekly updates on tunnel excavation progress please visit the
Roadheader page.
East Segment
Maintenance and Storage Facility (MSF)
Construction activities ramp up at the MSF as long-term closure of Belfast Road south of Tremblay to Trainyards Drive continues.
- Utilities and storm sewer work continues.
- Excavation progresses on the MSF building foundation.
- Mobilization of equipment, installation of trailers, fencing, decommissioning of utilities and stripping of asphalt progresses.
Building foundation work progresses at the MSF
Huge photo here:

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Civic Works
Highway 417 Roadwork, Widening and Structure Rehabilitation
Roadworks
- Boring and sewer work advances on the north and south side of the highway.
- From St. Laurent Boulevard to Vanier Parkway, drilling of piles, pouring and panel work progresses for the sound wall footings along the south side of the highway. On the north side grading continues and drilling for the noise wall continues.
- Roadway construction continues and includes excavation, grading, casting of concrete barrier walls and paving along the north and south sides of Highway 417 from St. Laurent Boulevard to Nicholas Street.
- Installation of high mast light poles continues.
Signage
- The three message signs have been installed; final construction and electrical works to power the signs is ongoing.
Trenching for Advanced Traffic Management Signage
Structures
- Widening, reconstruction and rehabilitation of various bridge structures along the highway continues to progress.
Hurdman Bridge
- Curing of the new deck occurs on the north side of the structure.
- Placing concrete on the barrier wall proceeds as rehabilitation advances.
- Installation of rebar and rails and grading continue on the south side deck.
Concrete curing at the north side of the Hurdman Bridge
St. Laurent Overpass
- Widening and rehabilitation on the south side of the structure progresses and involves backfilling at the abutment and formwork.
- Shoulder and on-ramp reconstruction is ongoing for the next week at the northeast and southwest on-ramps and includes excavation and grading.
South barrier wall of St. Laurent Boulevard Overpass
Vanier Parkway Overpass– work advances in preparation of the rapid bridge replacement scheduled for fall 2014.
- Work progresses in the staging area as girder installation continues. Installation and forming[iii] of the new deck is scheduled in the next few weeks.
- Overnight roadwork continues on the northwest on-ramp.
- Northeast on-ramp reconstruction continues and includes excavation and pouring of new concrete barrier wall.
- Forming of parapet walls[iv], pouring concrete curing occurs on the existing structure this week.
Girder installation in the staging area for the Vanier Parkway new bridge structure
Belfast Road Underpass– work advances in preparation for conventional demolition of the existing structure and reconstruction of the new bridge scheduled for fall 2014.
- Concrete curing as well as forming and pouring of the parapet walls continue on the existing structure.
- Piling continues for the retaining wall as temporary rehabilitation work advances on the existing structure.
- Variable message signs indicating upcoming closure on Belfast Road, north of Tremblay Road to Coventry Road, are onsite and powered on with advance notification of closure beginning June 2, 2014.
Belfast Bridge form work
Lees Avenue Underpass – work visibly progresses in the staging area in preparation of the rapid bridge replacement.
- Construction of the new bridge components is ongoing in the staging area, and involves rebar installation on the new deck.
- Rebar installation continues on the temporary footings for the existing structure.
- Preparatory work advances for the removal of existing structure by rapid removal scheduled for June 21 and 22, 2014.
Coventry Pedestrian Footbridge– pier and abutment work progresses in preparation of the superstructure installation scheduled for mid June.
- Extension of the south abutment footing continues this week, and includes forming as well as pouring of south side abutment walls.
Coventry Pedestrian footbridge pier construction continues
Stay on-track with us and follow our progress by visiting the sections related to each area of construction at the top of this webpage.
[i] Drifts refer to the sections of the wider station cavern that are excavated in sequence as per diagram below.
[ii] Bench refers to the rock at the bottom of the ramp.
[iii] Formwork refers to a mold in which concrete is poured.
[iv] Parapet wall refers to a protective barrier on the side of a bridge