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Stage 2 - Trillium Line - Construction Updates


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Stage 2: Extending the O-Train South, East, and West
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O-Train South Extension - Construction Update for July

July 31, 2020

In the south, there is ongoing work at the Walkley Maintenance and Storage Facility (MSF) and on multiple rail bridges including Airport Parkway, Uplands Road, Lester Road, Leitrim Road, Bowesville Road, Earl Armstrong Road, and Limebank Road.

 

Existing Trillium Line


Gladstone Station
▪ Rock excavation through the use of hoe ramming and controlled blasting is underway to widen the rail corridor at Gladstone Avenue.

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Pictured Above: Gladstone Station rock removal following controlled detonation.

Carleton Station Multi-Use Pathways (MUPs)
▪ The northside MUPs to the underpass have been closed to accommodate construction. A temporary MUP detour has been constructed to maintain pedestrian and cyclist connectivity away from active construction.
▪ The southside MUP will also be closed to accommodate construction, and a detour will be in place to maintain pedestrian and cyclist connectivity. 

Dows Lake Tunnel
▪ Removal of rail inside the Dows Lake Tunnel is complete, crews are currently removing expansion joint covers.

Ellwood Diamond
▪ Caisson drilling work for the new rail bridge between Mooney’s Bay Station and Walkley Station continues.

Walkley Maintenance and Storage Facility (MSF)
▪ Crews continue to work on the MSF Main Building foundations including concrete work for the light and heavy maintenance pits, elevator pits, grade beams and underfloor services.
▪ Civil works for the underground utilities including storm drainage and sanitary system are continuing.


Trillium Line South Extension


South Keys Station
▪ A section of the Sawmill Creek multi-use pathway (MUP) closed early in July for 3 weeks to accommodate foundation work for the future South Keys Station. Activities include site preparation, fence installation, excavation, and foundation construction. A detour is in place to maintain access for pedestrians and cyclists.

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Pictured Above: A multi-use pathway detour is in place to maintain access for pedestrians and cyclists in the area of the future South Keys Station.

Airport Parkway Rail Bridge
▪ Crews are finishing bridge embankment works.
▪ Bridge deck panel installation is underway.

Airport Elevated Guideway
▪ 14 of 17 caissons have been poured.
▪ 9 of 17 columns have been poured.
▪ 3 of 12 pier caps have been completed.
▪ Caisson, column, and pier cap work continues.

Uplands Drive Rail Bridge
▪ Crews are finishing bridge embankment works.
▪ Bridge deck panel installations are complete, and preparations to start deck formwork are underway. 

Lester Road Rail Bridge
▪ Pier cap construction and installation of rail girders are complete.
▪ Preparations to begin bridge deck rebar and formwork are underway.

Leitrim Road Rail Bridge
▪ 2 of 4 caissons are complete. The 2 remaining north caissons are pending watermain reconfiguration.
▪ Construction of the south abutment cap is underway.
▪ Retaining wall construction continues.

Bowesville Road Rail Bridge
▪ Bridge deck panel installation is getting underway

Bowesville Station
▪ Ground improvement work continues between Earl Armstrong Road and Bowesville Road in preparation for station construction.

Earl Armstrong Rail Bridge
▪ Work on the north columns and pier caps continue.
▪ 2 south columns have been cast.
▪ Construction of the south abutment cap is underway.

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Pictured Above: 2 south columns cast for Earl Armstrong Rail Bridge.

Limebank Elevated Guideway
▪ 6 of 10 caissons are complete.
▪ 4 of 10 columns are complete.
▪ Ground improvement work for the Limebank Road embankment continues.

Guideway between Leitrim Road and Earl Armstrong Road
▪ Ground improvement work is underway at the Earl Armstrong Road embankments.

Guideway between Hunt Club Road and Leitrim Road
▪ Embankment work is ongoing.
▪ Culvert installation work has begun.
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I started going over the PA for the Trillium Extension, and here are some of the "note-worthy" observations so far. Penalties have all been redacted from the PA. As explained during the city-cou

I suspect that if the rest of the line were to be twinned that the single-track tunnel would function quite well. This is what Sacramento does on its main line crossing of a river. And it can seem lik

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O-Train South Extension - Construction Update for August

August 28, 2020

In the south, there is ongoing work at the Walkley Maintenance and Storage Facility (MSF) and on multiple rail bridges including Airport Parkway, Uplands Road, Lester Road, Leitrim Road, Bowesville Road, Earl Armstrong Road, and Limebank Road.

To view a detailed and interactive map of the Stage 2 alignments, please visit Ottawa.ca/Stage2. Use the zoom function to narrow-in on your geographical area of interest, and click station names for a quick link to artistic renderings and detailed description. 
 

Project Spotlight

Upgrades to the Dows Lake Trillium Line Tunnel
What’s up down under Dows Lake? Visit Ottawa.ca/Stage2 to learn how the TransitNEXT crew continue to make headway on construction upgrade works in the tunnel under Dows Lake, stretching between Carling Station and Carleton Station.

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Pictured Above: Safety partners walk-through of Dows Lake Tunnel.
 

Existing Trillium Line

Gladstone Station
▪ Rock excavation through the use of hoe ramming and controlled blasting to widen the rail corridor at Gladstone Avenue has been completed on the east side at Gladstone Station. Rock excavation continues on the west side at Gladstone Station.

Carling Station
▪ Rock excavation is expected to commence in mid-September.
▪ This work will require modification to the existing MUP.

Dows Lake Tunnel
▪ Crews have completed the removal of rail, ballast and track ties.
▪ Cleaning of the trenches and structure is underway, in preparation for minor repairs and crack injection work.

Carleton Station Multi-use Pathways (MUPs)
▪ The northside MUP to the underpass has been closed to accommodate construction. A temporary MUP detour has been constructed to maintain access for pedestrians and cyclists.
▪ Wet utilities are under construction by the northside MUP.   
▪ The southside MUP is closed to accommodate ongoing excavation, and a temporary MUP detour is in place to maintain access for pedestrians and cyclists.
▪ Excavation, rebar and formwork have commenced. 

Mooney's Bay Station
▪ Work is underway to remove the shelter and light posts from the existing station.

Ellwood Diamond Rail Bridge
▪ Caisson drilling work for the new rail bridge between Mooney’s Bay Station and Walkley Station continues.
▪ Rogers utility relocations will soon begin, in preparation for the demolition of the S/E Transitway and the Sawmill Creek Bridge.

Walkley Maintenance and Storage Facility (MSF)
▪ Concrete crews completed the underground concrete structures (substructure) as part of the main building’s foundation.
▪ Construction continues on services including maintenance pits.
▪ Civil works for the underground utilities are advancing within the MSF yard, including watermain networks, storm drainage, and the installation of a twin storm attenuation tank.
▪ Structural steel erection for the main building is underway and will continue to the end of August.

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Pictured Above: Structural steel installation is ongoing at the Walkley Yard MSF, while civil works for the underground utilities (including installation of a twin box culvert) also occurs. 


Trillium Line South Extension

South Keys Station
▪ A temporary MUP detour is in place to provide access for pedestrians and cyclists across the upper level of the Transitway.
▪ Excavation for the future Station is ongoing and the temporary support for the existing utilities is being maintained.

Hunt Club Rail Bridge
▪ Preparations are underway for utility work scheduled to start in early September, for approximately 6 weeks.

Airport Parkway Rail Bridge
▪ Bridge deck panel installation is completed.  
▪ Deck formwork and rebar work are underway and bridge embankment work is also ongoing..

Airport Elevated Guideway
▪ Caisson work is complete and 12 of 17 columns have been poured.
▪ 5 of 12 pier caps have been completed (see photo on next page).
▪ Girder installation is planned for the end of August.
▪ Excavation and embankment work between the Airport Elevated Guideway and Uplands Drive Rail Bridge continues.

Uplands Drive Rail Bridge
▪ Bridge deck panel installations are complete, and bridge embankment works are wrapping up. Deck formwork and rebar work are underway. 

Lester Road Rail Bridge
▪ Pier cap construction and installation of rail girders are completed, and bridge deck formwork continues.
▪ Construction has started for the installation of a Mechanically Stabilized Earth (MSE) retaining wall at Lester.
▪ Excavation and embankment work are underway between Lester and Hunt Club.

Leitrim Road Rail Bridge
▪ 2 of 4 caissons are complete. The construction of the 2 remaining north caissons are pending a watermain reconfiguration.
▪ Construction of the south abutment is completed.
▪ Utility work will be required for a new watermain valve installation located under the eastbound lane of Leitrim Road.

Mosquito Creek Bridge
▪ Construction of a crane pad is complete on the east side of the alignment.

Bowesville Road Rail Bridge
▪ Preparations to start deck formwork and rebar work are underway, and bridge deck panel installation continues.

Bowesville Station
▪ Ground improvement work continues between Earl Armstrong Road and Bowesville Road in preparation for station construction.
▪ The construction of the embankment for station platforms is ongoing.
▪ Crews have prepared a piling platform for pile driving.

Earl Armstrong Rail Bridge
▪ South columns are complete, while work on the north columns and pier caps continues.
▪ Overhead utility work has begun and is expected to be completed by early September.

Limebank Elevated Guideway
▪ 8 of 10 caissons are complete.
▪ 4 of 10 columns are complete.
▪ Ground improvement work continues.

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Pictured Above: Airport columns and pier caps along the Airport Elevated Guideway.

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Pictured Above: Progress on the installation of a Mechanically Stabilized Earth (MSE) retaining wall at Leitrim.

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Pictured Above: Ground improvement works continue at Bowesville Station.
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Good Day.

City has posted a slightly more comprehensive description of work on the Dow's Lake Tunnel specifically :

Project Spotlight: Upgrades for the Dows Lake Trillium Line Tunnel

https://ottawa.ca/en/planning-development-and-construction/major-projects/stage-2-light-rail-transit-project/project-updates#project-spotlight-upgrades-dows-lake-trillium-line-tunnel

EnJoy!

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Good Day.

Yup - single track for quite some time to come.

They did do some studies about twinning the tunnel in some manner (around about the previous expansion, when passing tracks were put in to increase frequency of service <<snort>>), but preliminary engineering said that the disruption to the Arboretum would be considerable, including the loss of several unique specimens. And alternatives to a simple twinning were far too expensive for the expansion considerations at that point, so it was pretty much locked in as a single tunnel until the massive shutdown to come for full T-Line twinning and electrification.

Like I said - single track for quite some time to come.

Oh Well. <sigh>!

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5 hours ago, J.OT13 said:

I wonder what sort of frequency we could achieve by double tracking everything BUT the Dow's Lake tunnel.

Good Day.

I have no numbers, but IMHO it would be reasonable to suggest that the frequency could increase CONSIDERABLY,

given stations essentially at both ends of the tunnel (Carleton and Dow's Lake).

I have to think any restriction would be minimal, especially if you gauntlet track the tunnel, eliminating the failpoint of switches..

FWIW.

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I suspect that if the rest of the line were to be twinned that the single-track tunnel would function quite well. This is what Sacramento does on its main line crossing of a river. And it can seem like that bridge, as would be the case for the tunnel, is in pretty much constant use with trains going both ways in sequence. If the sequencing is properly automated why would it not work? The transit time through the tunnel is a bit more than a minute at best which means that the tunnel could handle at least 15-20 trains per hour in each direction . . .

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Received an email update:

Walkley Station Work: Walkley MUP Closure

September 29, 2020
As part of the Stage 2 O-Train Trillium Line South Extension project construction is ready to begin at Walkley station, which will require the temporary closure of the Walkley MUP adjacent to the Trillium Rail Line. A detour will be in place to maintain uninterrupted access for pedestrians and cyclists.

WHAT The Walkley MUP will be closed for approximately one year to allow crews to construct the new Walkley station.     

WHEN: The detour will start on September 30 and be in place until September 2021.This schedule is subject to change.    
 
WHY: The temporary closure of a section of the MUP is required to provide crews the space needed to perform the foundation work for the future Walkley station.    
 
WHERE A section of the Walkley MUP (Red dotted line) adjacent to the Trillium Rail Line will be closed with a detour in place (Yellow dotted line) allowing pedestrians and cyclists to safely move around construction. See map below for additional details.

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DATES AND HOURS OF WORK
 
Construction activity will occur from September 30, 2020 to September 2021.
 
ANTICIPATED IMPACTS
 
Pedestrians and cyclists will be detoured around the construction zone and must adhere to detour signage.

Edited by J.OT13
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Stage 2: Extending the O-Train South, East, and West
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O-Train South Extension - October Construction Recap

November 3, 2020

In the south, work is progressing well at the Walkley Maintenance and Storage Facility (MSF) and on multiple rail bridges including Airport Parkway, Uplands Road, Lester Road, Leitrim Road, Bowesville Road, Earl Armstrong Road, and Limebank Road. The Stage 2 LRT team is preparing to begin track installation on the O-Train South extension. 16 km of new rail will be installed as we extend the O-Train network to Riverside South and neighbouring communities

To view a detailed and interactive map of the Stage 2 alignments, please visit Ottawa.ca/Stage2. Use the zoom function to narrow-in on your geographical area of interest, and click station names for a quick link to artistic renderings and detailed description. 

 

Existing Trillium Line


Bayview Station and Trinity Pedestrian Bridge
  • Crews have mobilized for construction activities by preparing the laydown area. Survey stakes have been erected to mark the perimeter for the installation of fencing around the laydown area which is on the City’s land by Tom Brown Arena. The laydown area is required to facilitate and support construction activities and ensure the health and safety of TransitNEXT crew and the public.
  • Grade work commenced during the week of October 5 and crane pad construction on the east side of the site began the week of October 13.
Gladstone Station
  • Rock hauling is underway.
Carling Station
  • The removal of rail and signal equipment has commenced.
  • Demolition plans are underway for the existing platform and Station.
  • Topsoil excavation is nearing completion.
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Pictured Above: Rail and signal removal is underway at Carling Station in advance of upcoming station and platform demolition.

Dows Lake Tunnel
  • Crews have completed the removal of rail, ballast and track ties.
  • Expansion joint sealing and cracking injection work are underway.
Carleton Station Multi-use Pathways (MUPs)
  • The northside MUP to the underpass is closed to accommodate sanitary and storm sewer utility work. A temporary detour has been constructed to maintain access for pedestrians and cyclists. Removal of the existing underpass has begun.
  • The southside MUP is closed to accommodate ongoing excavation, and a temporary detour is in place to maintain access for pedestrians and cyclists.
  • 3 of 4 footings are completed for the southside MUP.
  • Abutment and wingwall construction are ongoing.
  • Excavation, rebar and formwork are progressing. 
  • The removal of rail and signaling equipment has commenced.
Mooney's Bay Station
  • The removal of the shelters, light posts, and demolition of the existing station is complete.
  • A MUP detour is in place to divert pedestrians and cyclists around the work zone
  • Crews are encasing fiber cables in steel as part of local utility works.
Ellwood Diamond (VIA rail crossing) Rail Bridge
  • 2 out of 9 caissons are completed.
  • Preparations are underway for the demolition of the south-east Transitway and the Sawmill Creek bridges, to occur following utility relocations.
  • An existing segment of the Brookfield MUP closed earlier this fall and a temporary detour is in place until the end of 2021 in order to maintain safe access for pedestrians and cyclists.
Walkley Maintenance and Storage Facility (MSF)
  • Civil works for the underground utilities are advancing within the MSF yard, including the drainage and duct bank system.
  • Structural steel erection for the main building is complete and exterior shell work is commencing later in October.
  • Track welding work is underway and nearing completion at the MSF.

Trillium Line New Extension


Walkley Station
  • Site preparations for Walkley Station commenced in early October, including the construction of site access roads and the laydown area.
  • An existing segment of the Walkley MUP was temporarily closed on September 30 and a temporary detour is in place until September 2021 in order to maintain safe access for pedestrians and cyclists around the work zone.
South Keys Station
  • Excavation for the future Station is complete and the temporary support for the existing utilities is being maintained.
  • Pile driving for the station foundation continues.
  • Track welding is underway for the construction of the new tracks.
Guideway between Greenboro and Hunt Club Road 
  • Earthworks are ongoing.
Hunt Club Rail Bridge & Pedestrian Bridge
  • Utilities work began in mid-September. Once complete in mid-October, bridge work will begin.
  • Overnight work is required to complete the duct bank construction to facilitate the relocation of overhead utilities.
Guideway between Hunt Club Road and Leitrim Road Bridge
  • Sub-base, sub-ballast and landscaping work are ongoing.
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Pictured above: Embankment construction is progressing between Lester Road and Hunt Club Road.

Guideway between Hunt Club Road and Leitrim Road:
  • Sub-base, sub-ballast and landscaping work are ongoing.
Airport Parkway Rail Bridge
  • Bridge deck pre-cast panel installations are completed.
  • Deck formwork and rebar work are ongoing. Bridge embankment work is also ongoing.
Airport Elevated Guideway
  • Caisson work is complete.
  • 13 of 17 columns have been poured. 
  • 7 of 12 pier caps have been completed.
  • 12 girders were erected, and installations continue.
  • Bridge deck formwork in Spans 1 and 2 are ongoing.
  • Bridge deck formwork in Spans 3 and 4 are underway.
  • Excavation and embankment work between the Airport Elevated Guideway and Uplands Drive Rail Bridge continues.
Uplands Drive Rail Bridge
  • Bridge deck pre-cast panel installations are complete, and bridge embankment works are wrapping up.
  • Reinforcing steel installation and deck formwork are completed.
  • Bridge deck pour was completed.   
Lester Road Rail Bridge
  • Bridge deck pour was completed.
  • Diaphragm and parapet wall construction are ongoing.
  • Construction continues for the installation of a Mechanically Stabilized Earth (MSE) retaining wall at Lester.
  • Excavation and embankment work are ongoing between Lester and Hunt Club.
Leitrim Road Rail Bridge
  • 2 of 4 caissons are complete.
  • Construction continues for the installation of a Mechanically Stabilized Earth (MSE) retaining wall.
  • Work to install a new watermain valve under the eastbound lane of Leitrim Road will require lane shifts and are expected to be concluded by October 16.
  • Preparations are underway for tree removal north of Leitrim. Due to design changes, additional removals are being confirmed.
Mosquito Creek Bridge
  • 4 of 8 caissons are complete.
  • Drilling operations on the north side are underway
  • Construction of a work site pad, and bridge caisson drilling, continue.
Bowesville Road Rail Bridge
  • Bridge deck rebar work is ongoing.
  • The bridge deck concrete pour is expected in late October.
Bowesville Station
  • Ground improvement work continues between Earl Armstrong Road and Bowesville Road in preparation for station construction.
  • The construction of the embankment for station platforms is ongoing.
  • Station pile driving is ongoing.
Earl Armstrong Rail Bridge
  • North and south abutments are completed.
  • Overnight girder installation is now planned to occur in late October.
  • Overhead utility work is complete.
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Pictured above: Crews completed the north pier cap in preparation for the upcoming girder installation for the new Earl Armstrong Rail Bridge.

Limebank Elevated Guideway
  • 8 of 10 caissons are complete.
  • 4 of 10 columns are complete.
  • Pier cap work is ongoing.
  • Ground improvement work continues.
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Pictured above: Crews are constructing “Dance Floors” at the Limebank Elevated Guideway.  Dance floors allow for platform formwork to take place when constructing the superstructure of each column.
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Trillium Line Trench Widening

Notice of Construction

December 2020

As part of the Stage 2 O-Train Trillium Line South Extension Project, work has begun to prepare the trench between Highway 417 and Beech Street for rock excavation. Due to Ministry of Transportation requirements to protect the 417 structures in the area, crews are not able to use controlled detonations to break up the rock. Instead, they will weaken the rock by drilling into it before using a hoe ram to break it apart.

What

Crews are scheduled to begin line drilling the week of January 4, 2021. As crews complete a section of line drilling the hoe ram will follow to break the rock apart. This method will be used for the length of the trench.

When

Line drilling is scheduled to start the week of January 4, 2021. We currently expect the hoe ramming of the first line-drilled section to begin the second week of January. This process will start on the south side of Gladstone Avenue and continue south until Beech Street. Crews expect to be finished the rock excavation of the full length of the trench by April 2021, but this schedule is subject to change.

Why

Rock excavation is required to widen the trench in preparation for the installation of a second track.

Where

Please see the map included. All construction activities will take place inside existing fencing.

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Dates and Hours of Work

Line drilling activities will begin the week of January 4th with hoe ramming beginning shortly after. All work will proceed between 7:00 am and 5:00 pm Monday through Friday.
 

Anticipated Impacts

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