Toronto Transit Commission - Yonge
Subway Extension (YSE)
Conceptual Design
Construction Plan
August 26, 2011
Toronto Transit Commission - Yonge Subway Extension (YSE)
Conceptual Design – Construction Plan
Toronto Transit Commission
5160 Yonge Street
Toronto, ON M2N 6L9
Toronto Transit Commission Yonge Subway Extension (YSE)
Conceptual Design
Construction Plan
August 26, 2011
Hatch Mott MacDonald
2800 Speakman Drive
Mississauga, Ontario L5K 2R7
Canada
Tel: 905 855 2010
Fax: 905 855 2607
john.mcdonald@hatchmott.com
John McDonald
Contract #Y85-9/001/B
Toronto Transit Commission - Yonge Subway Extension (YSE)
Conceptual Design – Construction Plan
Toronto Transit Commission Yonge Subway Extension (YSE)
Conceptual Design
Construction Plan
Issue and Revision Record
Rev
A
B
Date
July 11, 2011
Aug. 26, 2011
Originator
J. McDonald
J. McDonald
Checker
Approver
Description
Draft for Comments
Conceptual Design
This document has been prepared for the titled project or named part thereof and should not be relied upon or used for any other
project without an independent check being carried out as to its suitability and prior written authorization of Hatch Mott
MacDonald being obtained. Hatch Mott MacDonald accepts no responsibility or liability for the consequence of this document
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MacDonald for all loss or damage resulting therefrom. Hatch Mott MacDonald accepts no responsibility or liability for this
document to any party other than the person by whom it was commissioned.
To the extent that this report is based on information supplied by other parties, Hatch Mott MacDonald accepts no liability for
any loss or damage suffered by the client, whether through contract or tort, stemming from any conclusions based on data
supplied by parties other than Hatch Mott MacDonald and used by Hatch Mott MacDonald in preparing this report.
Contract #Y85-9/001/B
Toronto Transit Commission - Yonge Subway Extension (YSE)
Conceptual Design – Construction Plan
List of Contents and Appendices
1 2 3 4 5 Page
Introduction ................................................................................................................................. 1 1.1 Purpose ........................................................................................................................... 1 1.2 Scope .............................................................................................................................. 1 Contracting Strategy ................................................................................................................... 1 2.1 Contract Strategy ............................................................................................................ 1 2.2 Contracting Options ....................................................................................................... 2 2.3 Contracting Recommendations ...................................................................................... 2 2.4 Contract Interfaces ......................................................................................................... 3 2.4.1 Train Storage Facility ........................................................................................ 3 2.4.2 Richmond Hill Centre Station ........................................................................... 4 2.4.3 East Don River Bridge ...................................................................................... 4 2.4.4 Clark Station ...................................................................................................... 5 2.4.5 Steeles Station ................................................................................................... 5 2.4.6 Early Works Contractors ................................................................................... 5 2.4.7 Systems Installation Contractors ....................................................................... 6 Construction Staging / Methodology .......................................................................................... 6 3.1 Launch Shafts ................................................................................................................. 6 3.2 Tunnel Boring Machines ................................................................................................ 7 3.3 Tunnel Drives ................................................................................................................. 7 3.4 Tunnel Segmental Lining ............................................................................................... 8 3.5 Extraction Shafts ............................................................................................................ 8 3.6 Cut and Cover Construction ........................................................................................... 8 Construction Sites ....................................................................................................................... 9 4.1 Richmond Hill Centre Station and Vicinity ................................................................. 10 4.2 Don River Bridge and Vicinity .................................................................................... 10 4.2.1 Existing Conditions ......................................................................................... 10 4.2.2 Traffic Management during Construction ....................................................... 11 4.2.3 Construction Contracts .................................................................................... 11 4.3 Steeles Station and Vicinity ......................................................................................... 12 4.4 Cummer Station and Vicinity ....................................................................................... 12 Traffic Management .................................................................................................................. 13 5.1 Traffic Lanes ................................................................................................................ 13 5.2 Alternative Traffic Options .......................................................................................... 14 Contract #Y85-9/001
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Toronto Transit Commission - Yonge Subway Extension (YSE)
Conceptual Design – Construction Plan
5.3 Road Closures .............................................................................................................. 14 5.4 Turn Lanes ................................................................................................................... 14 5.5 Signing ......................................................................................................................... 15 5.6 Traffic Signal Adjustments/Timing ............................................................................. 15 5.7 Transit Operations and HOV Lanes ............................................................................. 15 5.8 Pedestrians.................................................................................................................... 15 5.9 Private Access .............................................................................................................. 15 6 Construction Schedule .............................................................................................................. 15 7 Critical Path............................................................................................................................... 16 Appendices
Appendix A - Drawings
Appendix B - Schedules
Contract #Y85-9/001
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Toronto Transit Commission - Yonge Subway Extension (YSE)
Conceptual Design – Construction Plan
1 Introduction
1.1 Purpose
The purpose of this Construction Plan is to document the contracting strategy and construction
methodology for the Yonge Subway Extension (YSE) that meets the challenging needs of this project and
to develop an overall construction schedule for planning purposes. The capital cost estimate is based on
the methodology and assumptions used in this report. This document is a requirement of the Conceptual
Design Phase of the project and will form a basis for a more detailed contracting strategy and construction
schedule that would be prepared during the next phase of the YSE project.
1.2 Scope
This Construction Plan documents the requirements for the proposed Yonge Subway Extension (YSE)
from the existing Finch Station Tailtrack to the Train Storage Facility located north of the Richmond Hill
Centre Station in York Region, an extension of 7.416 kilometres; consisting of five new subway stations
namely, Cummer Station, Steeles Station, Clark Station, Langstaff Station and Richmond Hill Centre
Station.
2 Contracting Strategy
2.1 Contract Strategy
For the purpose of the Conceptual Design, it is assumed that the contract strategy adopted for the Yonge
Subway Extension (YSE) would be consistent with the strategies previously employed for the
construction of the Sheppard Line and that is currently being implemented for the Toronto-York Spadina
Subway Extension (TYSSE). These strategies include the following:
1. An equipment contract for the advance owner procurement of earth pressure balance (refer below)
(EPB) tunnel boring machines (TBMs). The overall proposed tunnelling length for this project is very
similar to TYSSE and consequently, it is likely that four machines would be required. The capital cost
estimate will assume that the machines will be purchased new, however the timing of this project
could allow for the re-use of the machines currently assigned to TYSSE.
2. A material supply contract for the advance purchase of a precast segmental tunnel lining system
(compatible with the TBMs) to line the running tunnels.
3. Where possible, the number of interfaces between adjacent contractors should be minimized. One
method of achieving this objective is to include the construction of a station within a tunnel contract
particularly for those locations where the tunnel is initially driven through the station footprint. This
approach was not used for the Sheppard Project but has been adopted on TYSSE. The experience
gained on TYSSE will likely dictate whether this strategy will also be adopted for the Yonge Subway
Extension.
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Toronto Transit Commission - Yonge Subway Extension (YSE)
Conceptual Design – Construction Plan
2.2 Contracting Options
Based on the strategies listed in Section 2.1 above, the following contracting options should be
considered:
1. Tunnel drives from a launch shaft (LS1) at Richmond Hill Centre Station crossover south to an
extraction shaft (ES1) located within the north approach structure to the East Don River Bridge. This
contract could:

Include Langstaff Station and Park and Ride lot;

Exclude Langstaff Station and Park and Ride lot.
2. Tunnel drives from Steeles Station launch shaft (LS2) north of Steeles Station, north to an extraction
shaft (ES2) located within the south approach structure to the East Don River Bridge. This contract
could:

Include Clark Station;

Exclude Clark Station.
3. Tunnel drives from a launch shaft (LS3) at the Steeles Station crossover south to an extraction shaft
(ES3) located within an extension of the Finch Tailtrack. This contract could:

Include Cummer Station;

Exclude Cummer Station;

Include 180m of box structure extension to the existing Finch Station tailtrack;

Exclude 180m of box structure extension to the existing Finch Station tailtrack.
4. Construction of the East Don River Bridge including approximately 225m of twin box approach
structure south of the bridge and 200m of twin box approach structure north of the bridge.
5. Construction of a cut and cover underground train storage facility (834m long for Alignment Bi)
including removal and reconstruction of portions of Bantry Avenue Bridge. For construction
scheduling purposes and to establish potential requirements for construction sites and haul roads, it
has been assumed that this work would be split into two contracts.
6. Construction of Steeles Station, crossover and underground bus terminal.
7. Construction of Richmond Hill Centre Station, crossover and above ground bus terminal.
2.3 Contracting Recommendations
The current strategy, based on the Design-Bid-Build approach used for Sheppard and TYSSE projects,
that will be used to develop a preliminary construction schedule, is based on the following contract
packages:
1. Tunnel drives from a launch shaft (LS1) at Richmond Hill Centre Station crossover south to extraction
shaft (ES1) and including Langstaff Station and Park and Ride lot; This contract would also include
one EEB and for the re-alignment of the Highway 7 Yonge Street ramp to ensure sufficient cover was
provided over the tunnel;
Contract #Y85-9/001
Rev. B, Page 2
Toronto Transit Commission - Yonge Subway Extension (YSE)
Conceptual Design – Construction Plan
2. Tunnel drives from Steeles Station launch shaft (LS2) at Steeles Station north to an extraction shaft
(ES2) and tunnel drives from a launch shaft (LS3) at the Steeles Station crossover south to an
extraction shaft (ES3). This contract would also include three EEBs, the construction of Cummer
Station and substation and 180m of box structure extension to the existing Finch Station tailtrack;
3. Construction of the East Don River Bridge including approximately 225m of south twin box approach
structure and 200m of north twin box approach structure. Two EEBs are included in this package,
including all associated road diversions;
4. Construction of the train storage facility from the north end of Richmond Hill Centre Centre Station
to 30m south of the Bantry Avenue Bridge Overpass;
5. Construction of the train storage facility from 30m south of Bantry Avenue Bridge to the north end
including associated facilities (two EEBs, fan room, electrical services building, change facility and
the removal and replacement of the Bantry Avenue Bridge;
6. Construction of Richmond Hill Centre Station, crossover, substation and above ground bus terminal;
7. Construction of the substation and electrical services building at Royal Orchard;
8. Construction of Clark Station and substation;
9. Construction of Steeles Station, crossover, substation and underground bus terminal.
2.4 Contract Interfaces
As noted in Section 2.1, the construction schedule and the conceptual design capital cost estimate will be
based on the purchase of four earth pressure balanced tunnel boring machines. It has been assumed that
the first pair of tunnel boring machines would be used for construction package outlined in Section 2.3
Item 1. The second pair of tunnel boring machines would be used for construction package outlined in
Section 2.3 Item 2.
The tunnel contractors will install all headwalls at stations and extraction shafts through which the TBM
shall pass.
The tunnel contractors will be responsible for and complete the excavation, dewatering and temporary
works within all launch and extraction shafts. The permanent works within the launch and extraction
shafts may also be assigned to the tunnel contractors or they may be assigned to other contractors. For
instance, it is proposed that the permanent works for extraction shafts ES1 and ES2 be assigned to the
contractor responsible for the East Don River Bridge and the associated box approach structures; refer
Section 2.3, Item 4.
Key contract interfaces are as follows:
2.4.1 Train Storage Facility
The train storage facility will be a large earth moving exercise, with an overall length of more than 830m
and a depth of between 21.5 and 23m, the total excavated quantity will be approximately five times that
of a typical passenger station. It is therefore proposed to split the work into two contract packages (refer
Section 2.3, Items 4 and 5). The scope associated with demolishing a portion of the Bantry Bridge and re-
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Toronto Transit Commission - Yonge Subway Extension (YSE)
Conceptual Design – Construction Plan
building the bridge has been assigned to the more northern contract. Drawing SK020 has been prepared to
indicate the assigned split between the two contractors. Contractor interfaces therefore include:

Train storage contractor (refer Section 2.3, Item 4) and train storage contractor (refer Section 2.3,
Item 5) at a location approximately 30m south of Bantry Bridge;

Train storage contractor (refer Section 2.3, Item 4) and the contractor for Richmond Hill Centre
Station (refer 2.3, Item 6) with the interface being the north end of the station box.
2.4.2 Richmond Hill Centre Station
This work area will be quite complex and include the train storage facility to the north, the passenger
station and substation, a bus terminal, a crossover and a launch site for the tunnel drives south. In
addition, that the interface with the below ground 407 Transitway Station located just south of the bus
platform could also be required. For the present, this item will be excluded from the discussion. Drawing
SK020 has been prepared to indicate the various areas assigned to the various contractors. Contractor
interfaces therefore include:

Train storage contractor (refer Section 2.3, Item 4) and the contractor for Richmond Hill Centre
Station (refer Section 2.3, Item 6) with the interface being the north end of the station box.

The Richmond Hill Centre Station Contractor (refer Section 2.3, Item 6) and the tunnelling
contractor (refer Section 2.3 Item 1). As noted, the tunnelling contractor must initially re-shape
the existing stormwater pond and re-align the Highway 7 Yonge Street ramp to ensure sufficient
cover exists for the tunnelling operation. This contractor will also be responsible for a 45m long
launch shaft including excavation, dewatering and support of excavation. The permanent works
could be assigned to the tunnelling contractor (per TYSSE methodology) or it could be assigned
to the Station Contractor.
2.4.3 East Don River Bridge
As noted in Section 2.3, Item 3, this package of work will include the construction of the bridge over the
East Don River and the twin box approach structures on either side of the bridge. Due to the reduction in
cover, it is necessary to extract the tunnel boring machines at the approach structures. As a minimum, it is
assumed that the tunnelling contractors will be responsible for excavation, dewatering and support of
excavation including secant pile headwalls for the extraction shafts. For these locations, it is proposed to
assign the permanent works at the extraction shafts to the contractor for the bridge and approach
structures.
Drawing SK022 has been prepared to illustrate the work site implications. Contractor interfaces therefore
include:

Tunnelling contractor (refer Section 2.3, Item1) that will be extracting the TBM at extraction
shaft ES1 at the northern end of the north approach structure and will therefore interface with the
East Don River Bridge and approach structures contractor.

Tunnelling contractor (refer Section 2.3, Item 2) that will be extracting the TBM at extraction
shaft ES2 at the southern end of the south approach structure and will therefore interface with the
East Don River Bridge and approach structures contractor.
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Toronto Transit Commission - Yonge Subway Extension (YSE)
Conceptual Design – Construction Plan
2.4.4 Clark Station
Consistent with the philosophy used for Sheppard Line and the TYSSE projects, the tunnelling contractor
is responsible for installing the secant pile end headwalls at a station interface irrespective of the
assignment of responsibility for construction of the station. In Section 2.3, Item 8, it was recommended
that construction of Clark Station be undertaken by an independent station contractor. This station will
have unique water issues (dewatering, contiguous pile cut-off walls for support of excavation) that
differentiate this station from other stations required for the expansion. Contractor interface therefore
includes:

Tunnelling contractor (refer Section 2.3, Item 2) will install secant pile headwalls at both ends of
Clark Station and will tunnel through the station. The Clark Station contractor (refer Section 2.3,
Item 8) will be responsible for ultimately removing the tunnel lining segments within the station
headwalls and will be restricted in the extent of excavation that can be undertaken prior to the
completion of the tunnelling contractor’s work for the segment between Steeles Station and the
East Don River Bridge south approach structure.
2.4.5 Steeles Station
This work area will be extremely complex and include for the subway station and substation, a below
ground bus terminal, bus ramps and portals on Steeles Avenue, a crossover and launch sites for the tunnel
drives north from Steeles Station to the East Don River Bridge south approach structure and south from
the Steeles Station crossover to the extension of the Finch Tail Track. In addition, this work must be
undertaken below major urban arteries (Yonge Street and Steeles Avenue).
Drawing SK021 has been prepared to illustrate the work site implications. Contractor interfaces therefore
include:

The Steeles Station Contractor (refer Section 2.3, Item 9) and the tunnelling contractor (refer
Section 2.3 Item 2). As noted, the tunnelling contractor will be responsible for a 45m long launch
shaft, located adjacent to the northern station box unit, including excavation, dewatering and
support of excavation. The permanent works could be assigned to the tunnelling contractor (per
TYSSE methodology) or it could be assigned to the Station Contractor.

The Steeles Station Contractor (refer Section 2.3, Item 9) and the tunnelling contractor (refer
Section 2.3 Item 2). As noted, the tunnelling contractor will be responsible for a 45m long launch
shaft, located within the southern end of the crossover, including excavation, dewatering and
support of excavation. The permanent works could be assigned to the tunnelling contractor (per
TYSSE methodology) or it could be assigned to the Station Contractor.
2.4.6 Early Works Contractors
For the purpose of a Conceptual Design discussion, it is deemed to be unnecessary to identify scope that
may be implemented by other contractors that would lead to further interface issues with the contractors
identified above. For instance, the scope associated with modifying the existing stormwater pond at
Richmond Hill Centre Station and re-aligning the Highway 7 Yonge Street ramp from Yonge Street was
assigned to the tunnelling contractor. The responsibility for re-location of utilities is not addressed. By
default, it is assumed that this work will be implemented by the station contractor and or tunnelling
contractor. To minimize the risk of delays to the project, it may become necessary for this work or for
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Toronto Transit Commission - Yonge Subway Extension (YSE)
Conceptual Design – Construction Plan
other items of a similar nature, to be assigned to other contractors. These situations will be identified and
addressed during detailed design.
2.4.7 Systems Installation Contractors
Systems installation includes for: installation of the double-tie track system and isolated slab at special
trackwork locations, installation of rail and rail components including rail welding, traction power,
signalling and communications and supervisory control. Interface issues between system installation
contractors and the station and/or tunnelling contractors are too complex to be addressed at the level of a
Conceptual Design. In particular, station construction contracts are generally configured in such a manner
that systems installation contractors can obtain free and unobstructed access to the adjacent tunnels for
track construction and system installation. Where possible, dropshafts necessary to support this work have
been identified and located on the tunnelling general arrangements (refer SK023 and SK024) since these
features may necessitate property takes and will influence traffic management planning. In terms of
construction schedule, it is assumed that all systems installation will be planned in such a way that the
time allocated for construction of structures and finishing of stations, will be sufficient to complete the
systems installation. Systems installation, in fact, forms a large component of the structure finishing
duration. Commissioning of the system has been indicated on the construction schedule as a unique
activity.
3 Construction Staging / Methodology
The basic premise behind the methodology developed for the Sheppard Line and TYSSE and proposed
for this Yonge Subway Extension Project (YSE) is that where sufficient cover exists, tunnelling by earth
pressure balance tunnel boring machines (TBMs), operating in pressurized mode at all times, represents
the lowest cost construction methodology for the alignment, with the least surface disruption and
consequently, should be maximized to the greatest extent possible. Where there is a need for larger open
spaces (stations) or multiple track situations (crossover, pocket track and train storage facility), where
tunnelling is not feasible, supported open cut excavation will be used. Tunnel drives indicated on
drawings SK023 and SK024 represent 5082m of the overall alignment extension length of 7416m (69%).
This includes 510m for stations that are initially tunnelled through and then subsequently constructed by
cut and cover.
Various components of these methodologies are described below.
3.1 Launch Shafts
Launch shafts are the locations where the tunnel boring machines are lowered to track level to commence
a tunnel drive and subsequently used to remove spoil from the tunnel and to lower tunnel lining segments
and other construction materials. The tunnelling contractor is generally responsible for the design and
construction of the launch shaft, the slab that supports the TBM at the secant pile headwall and the thrust
frame and TBM cradles. The excavation width for the length of the tunnel boring machine is slightly
greater than the minimum width required for station and or twin box construction. The overall length of
the TBM and trailing gear is 70-80m; however the launch shaft will be restricted to a length of 45m. In
addition, the actual opening at street level will be further limited to 15m and located off-street where
possible.
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Toronto Transit Commission - Yonge Subway Extension (YSE)
Conceptual Design – Construction Plan
3.2 Tunnel Boring Machines
The conceptual design for the tunnels consists of twin tunnels spaced at 13.59m centres with finished
internal diameters of 5400mm. Generally, a cover equivalent to 1.5x tunnel diameter (8.1m) is maintained
over the tunnels. This requirement will dictate requirements to re-shape the existing stormwater pond
prior to commencing the drive south from Richmond Hill Centre Station crossover to provide adequate
cover, will dictate the need for approach box structures on either side of the East Don River Bridge and
for the extension of the existing Finch Station tailtrack where minimum cover results with the current
alignment profile.
It is expected that an owner-procured earth pressure balance (EPB) tunnel boring machine contract
strategy will be adopted for YSE as it was for TYSSE and for Sheppard. These machines will be specified
to operate in EPB mode which is defined as being operated with a filled, pressurized plenum chamber
with tunnel spoil removal by means of a screw conveyor. An earth pressure balance tunnel boring
machine (EPBM) is a fully shielded tunnel boring machine, which utilizes a full-diameter rotating cutter
head equipped with a combination of drag teeth and disc cutters, and which advances using hydraulic
rams that thrust against the tunnel initial support erected as a ring within the trailing shield. The machine
operates with an active face support system equipped with a screw conveyor, ground conditioning system,
and other equipment. The tunnel face support is provided by a highly viscous soil paste formed by the
excavated materials mixed with conditioners (bentonite slurry, foams, polymers or other additives). To
minimize ground loss, the annulus between the precast tunnel lining and the cavity excavated by the TBM
is grouted through radially spaced ports on the trailing shield.
3.3 Tunnel Drives
Tunnel drives 1 and 2 (1,937m in length) will launch from LS1 at the south end of the Richmond Hill
Centre Station Crossover and mine south through the future Langstaff Station, terminating at extraction
shaft ES1 in the north approach box to the East Don River Bridge. Secant pile headwalls will be installed
by the tunnel contractor at Langstaff. The tunnelling contractor will also be responsible for the temporary
works required at both the launch and extraction shafts and potentially the permanent works at the launch
shaft. Up to six weeks is typically allowed between the starts of the parallel drives. Upon completion of
the drives, these particular TBMS would no longer be required.
Tunnel drives 3 and 4 (1,958m in length) will launch from LS2 located adjacent and north of Steeles
Station and mine north through the future Clark Station, terminating at extraction shaft ES2 in the south
approach box to the East Don River Bridge. Secant pile headwalls will be installed at Clark Station. Due
to the high groundwater levels and groundwater pressures likely requiring cut-off walls to bedrock, Clark
Station will be assigned to a station contractor. Upon completion of the drives, these TBMs will be
transported back to Steeles Station for Drives 5 and 6.
Tunnel drives 5 and 6 (1,187m in length) will launch from LS3 at the south end of the Steeles station
crossover and mine south through the future Cummer Station, terminating at extraction shaft ES3 in the
extension of the existing Finch tailtrack. Secant pile headwalls will be installed by the tunnel contractor at
Cummer Station. Due to the fact that these drives will be the second in the series (following drives 3 and
4), it is proposed to also assign Cummer Station to this tunnelling contractor since the interface
management will be more critical.
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Toronto Transit Commission - Yonge Subway Extension (YSE)
Conceptual Design – Construction Plan
3.4 Tunnel Segmental Lining
The bored tunnels are designed as a complete system. The tunnel lining internal diameter (5400mm), ring
length (1500mm) and thickness (235mm) were specified for the TYSSE project as part of the TBM
procurement work. Lining design was based on a standard universal six-segment ring (4 trapezoidal
segments plus a key and counter-key segment). Geotechnical conditions for YSE would be very similar to
those encountered on TYSSE and therefore any changes that would be considered for YSE would likely
be as a result of actual experience on TYSSE. For this reason, it is expected that a similar procurement
strategy for the tunnel linings would be adopted.
3.5 Extraction Shafts
Extraction shafts are the locations where the tunnel boring machines are raised from track level to surface
at the completion of a tunnel drive. Responsibility for the design and construction of the extraction shaft
is assigned to the tunnelling contractor. The length of the extraction shaft will be 20m; however, where
possible, it may be located off-street permitting the TBM to be slid from its final drive position to its
removal position so that road traffic is not significantly affected. Alternatively, if the opening must be
within the street ROW, the street will be decked over until such time as it becomes necessary to remove
the machines. Since the tunnelling drives are staggered by approximately six weeks, the removal of the
TBMs will also be staggered by approximately six weeks.
3.6 Cut and Cover Construction
Stations, crossovers and emergency exit facilities will be constructed by cut-and-cover methods. This
practice was most recently used for the stations along Sheppard Avenue and will also be used for the
TYSSE facilities. The majority of the Yonge Subway Extension stations and EEBs are located within the
Yonge Street ROW. Cut-and-cover construction for these facilities will therefore require a series of
measures to initially divert traffic and utilities to permit installation of the selected excavation support
system.
Soldier piles and lagging excavation support is typically constructed by installing the soldier piles first
within the pre-bored holes, followed by installing lagging boards concurrent with the excavation process.
Limits are placed on the extent of open face area permitted to limit the potential for ground loss into the
excavation. This option should be considered in conjunction with adequate surface water management. It
should also be noted that soldier piles with lagging are a more flexible support system compared with
secant piles or continuous concrete diaphragm walls. Soldier piles with lagging are typically considered
suitable where ground movements are permitted to some degree, i.e. where sensitive structure or utilities
are not located adjacent to the proposed excavation. An internal system of whaler beams and struts are
provided to limit the deflection of the soldier piles. The spacing of the struts must also be placed in a
manner that does not interfere with subsequent concrete placement. At surface, a system of deck beams
will be installed to support the decking required to allow traffic movement during the excavation and
construction process.
In place of horizontal supports or struts, soil anchors may be used to provide unrestricted access to the
excavation areas. Soil anchors are generally designed by specialist contractors, who will supply, install
and undertake appropriate tests to confirm that the soil anchors meet the temporary works design criteria.
For anchors to be used, temporary construction easements will be necessary. Typically, anchors extend
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Toronto Transit Commission - Yonge Subway Extension (YSE)
Conceptual Design – Construction Plan
perpendicularly, or at a predetermined angle, beyond the line of the excavation a distance equal to 1.5 to
2.0 times the excavation depth. For this reason, soil anchors are used less frequently than the internal strut
system.
The preliminary geotechnical reports for each station based on the current investigation programme
provide guidance to when more specific water control measures are necessary to limit the risk of ground
loss. These measures may include the installation of multi-stage eductors for dewatering of layered
deposits and deep wells for depressurization of underlying aquifers. In the most severe circumstance,
contiguous caisson or diaphragm walls installed from surface into the bedrock may be necessary.
To permit the installation of current and future utilities, the station structures and other structures such as
ventilation shafts and emergency exits are generally positioned in such a manner to typically have 3m of
cover from the road surface to the structure (crossovers would have considerably more cover). To
minimize potential long term effects on the road systems, specifications mandate the quality and density
of the backfill that is placed on the structure to ensure a satisfactory result. Around utilities and in areas
where suitable compaction cannot be achieved, unshrinkable fill is specified.
4 Construction Sites
The Yonge Subway Extension (YSE) Project is 7.42km in length with 1.61km in the City of Toronto
(south of Steeles Avenue) and 5.81km in York Region (north of Steeles Avenue). The project comprises a
total of 5.08km of twin-bored tunnel, five stations, five substations, eight emergency exit buildings
(EEBs), six dropshafts, six cross passages, one bridge, 513m of twin or triple box structure and an 834m
below grade triple track train storage facility north of the Richmond Hill Centre Station. With the
exception of the cross passages, all these facilities have a component of cut and cover construction with
associated impact on current traffic flows and surrounding property.

Each of the contractors has requirements for site parking, site trailers and facilities, equipment
storage, materials handling laydown and access. The tunnelling contractor has requirements for
power distribution facilities, mechanical and electrical equipment, storage of lining segments and
for the possible treatment of spoil that may not be in a state for immediate haulage from the site.
The remaining contractors require additional storage space for formwork, reinforcing steel and
other materials of construction including cranes. Significant truck movements are required to haul
material offsite, deliver and pump concrete on-site and ultimately to bring backfill to the site prior
to restoration.

The construction contracts for the scopes of work described herein will be structured to minimize,
as much as possible, the interfaces between the adjacent contractors to avoid sources of conflict
and resulting claims. In addition, it should be noted that there will also be systemwide contractors
required for the installation of double ties and isolated slab, track, traction power and signalling
and communications requirements that must be installed primarily at track level and whose work
must also be coordinated particularly with the station contractors.
The four major areas of construction activity are described in more detail below:
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Conceptual Design – Construction Plan
4.1 Richmond Hill Centre Station and Vicinity
At least four large civil construction contracts are proposed for this 1.25km section of the Yonge Subway
Extension (YSE). These include:

At the south end of this section, a launch shaft will be required for the North Tunnels Contractor
(Contractor ‘A’) to launch the TBMs for Drives 1 and 2 south towards the East Don River Bridge.
Prior to commencing the excavation for the launch shaft, this contractor (or an early works
contractor) must initially re-shape the existing stormwater pond so that sufficient cover exists to
safely begin tunnelling. In addition, it is proposed that the Highway 7 Yonge Street ramp be realigned from its current location situated over the southern half of the crossover to the south of
the proposed launch shaft. This re-alignment will limit the influence of on-ramp traffic on
construction activity and avoid the need for numerous changes to the on ramp alignment that
would otherwise be required. An extension to the stormwater pond intake and the possible
adoption of a siphon design will also be required to remove the interface conflict between the
launch shaft and the intake. Refer to SK016, SK017 and SK018 for drawings indicating the
Highway 7 Yonge Street ramp re-alignment and changes to the stormwater pond profile.

The Richmond Hill Centre Station Contractor (Contractor ‘B’) will be responsible for
construction of the station including entrances, electrical substation, crossover and above ground
bus terminal. There is an option where the southernmost three units (45m) of the crossover
structure could be assigned to the tunnelling contractor. Note that the architectural drawing SKA-008A also indicates an underground Highway 407 Transitway Station to the south of the
proposed bus terminal. Currently, that station does not form part of the YSE project and is not
considered in this Conceptual Design evaluation.

Approximately 415m of the below ground train storage facility will be assigned to Contractor
‘C’. It should be noted that this contract would include 2.5 times the excavation quantity of a
typical station box, 2.0 times the concrete quantity and 5.0 times the quantity of backfill.

The remaining 419m of below ground train storage facility including two EEBs, a fan room,
electrical services building, maintenance operators building and a possible dropshaft will be
included in Contractor ‘D’ scope. In addition, construction of the train storage facility
necessitates the removal and subsequent reconstruction of a significant portion of the existing
Bantry Avenue Bridge.

Drawing SK020 was developed to show possible contractor site requirements and access. At this
time, it would not appear to be possible to isolate construction traffic from traffic used by
residents, office workers and mall patrons. It is expected however that a satellite bus terminal
facility will be developed such that the current VIVA bus terminal would not remain in operation
during the construction programme.
4.2 Don River Bridge and Vicinity
4.2.1 Existing Conditions
The East Don River is situated in a valley with wide open embankments on both sides and flows through
a 14m span concrete arch culvert under Yonge Street. Yonge Street crosses the East Don River in the
Contract #Y85-9/001
Rev. B, Page 10
Toronto Transit Commission - Yonge Subway Extension (YSE)
Conceptual Design – Construction Plan
Thornhill Heritage District, with the Ladies’ Golf Club of Toronto located on the east side of Yonge
Street and the Thornhill Country Club located on the west side.
The existing Yonge Street roadway, supported on an embankment across the East Don River valley,
consists of two general purpose lanes in each of the northbound and southbound directions and a centre
left turn lane.
4.2.2 Traffic Management during Construction
The preliminary traffic staging concept involves a 4-lane traffic detour (refer SK022) being built on the
west side of Yonge Street adjacent to the bridge and conventional diversions and decking for the bridge
approaches and will follow the existing profile of Yonge Street. Care will be taken during construction to
minimize environmental effects and to maintain continuous property access. Traffic stages indicated on
Drawings SK036 and SK037 consist of:

Stage 1 includes a 4-lane traffic detour and a pedestrian walkway constructed on the west side of
Yonge Street over the existing East Don River culvert.

In Stage 2, the bridge and northbound approaches will be constructed. General traffic will
circulate on the 4-lane detour built in Stage 1. Units for the west side approaches immediately
adjacent to the bridge would also be constructed at this time to facilitate the next stage of traffic
management.

In Stage 3, the remaining west side approaches and ultimate Ladies Golf Club access will be
constructed. Northbound traffic will use the new bridge; southbound traffic will continue to use
the detour.
4.2.3 Construction Contracts
At least three large civil construction contracts are proposed for this 0.6km section of the Yonge Subway
Extension (YSE). These include:

At the north end of this section, a tunnel extraction shaft will be required for the North Tunnels
contractor to retrieve the TBMs from Drives 1 and 2 launched from the south end of the
Richmond Hill Centre Station crossover. This tunnelling contractor is responsible for dewatering
and support of excavation for the tunnel extraction shaft and to retrieve the TBMs.

At the south end of this section, a tunnel extraction shaft will be required for the South Tunnels
contractor to retrieve the TBMs from Drives 3 and 4 launched from the north end of Steeles
Station. This tunnelling contractor is responsible for dewatering and support of excavation for the
tunnel extraction shaft and to retrieve the TBMs.

The bridge contractor will be responsible for construction of the road detours, construction of the
bridge and for both the north and south twin box approach structures including the permanent
works at the extraction shafts. Once the tunnel drives are complete, drop shafts are proposed to be
constructed within these extraction shaft locations.
Contract #Y85-9/001
Rev. B, Page 11
Toronto Transit Commission - Yonge Subway Extension (YSE)
Conceptual Design – Construction Plan
4.3 Steeles Station and Vicinity
At least two large civil construction contracts are proposed for this 395m section of the Yonge Subway
Extension (YSE). These include:

At the north end of this section, a tunnel launch shaft will be required for the South Tunnels
contractor to launch the TBMs for Drives 3 and 4 north towards the East Don River Bridge.

At the south end of the Steeles Station crossover, a tunnel launch shaft will be required for the
South Tunnels contractor to launch the TBMs for Drives 5 and 6 southwards to extraction shaft
ES3 located in the extension of the Finch Station tailtrack.

The above tunnelling drives, including dewatering and support of excavation for the launch
shafts, are assigned to the same contractor. This contractor is also assigned the construction of
Cummer Station, the electrical substation at Cummer and the 180m extension of the Finch
tailtrack structure.

The Steeles Station Contractor will be responsible for construction of the passenger station
including entrances, electrical substation, and crossover. There is an option where the
southernmost three units (45m) of the crossover structure and the 45m of box structure on the
north side of Steeles Station could be assigned to the Soth Tunnels Contractor.

The excavation will be decked over, where possible, to facilitate traffic flow and property access.
Due to limited depth of cover, decking may be removed to permit construction of the station roof
slab.

The Steeles Station Contractor’s work will also include the construction of a 16-bay below
ground bus terminal with a 185m long bus platform and associated ramps and entrance portals
with an overall portal to portal distance of 660m beneath Steeles Avenue.

Drawings SK021 and SK031-033 were developed to show possible contractor site requirements
and access.
4.4 Cummer Station and Vicinity
One large civil construction contract is proposed for this 520m section of the Yonge Subway Extension
(YSE) to minimize the potential number of contract interfaces and risk of claims. As noted in Section 2.3,
it is proposed to assign this work to the South Tunnelling Contractor responsible for tunnel drives 3 and 4
from Steeles Station north to the East Don River extraction shaft ES2 and for tunnel drives 5 and 6 from
the south end of the Steeles Station crossover to extraction shaft ES3. The work at Cummer Station and
vicinity will include:

A 180m triple box extension of the existing Finch pocket track;

At the north end of this triple box section, a tunnel extraction shaft (ES3) will be required for the
tunnelling contractor to retrieve the TBMs from Drives 5 and 6. The tunnelling contractor is
responsible for dewatering and support of excavation for the tunnel extraction shaft and to
retrieve the TBMs.

Installation of the secant pile headwalls at Cummer Station so that the TBMs can tunnel through
the station;
Contract #Y85-9/001
Rev. B, Page 12
Toronto Transit Commission - Yonge Subway Extension (YSE)
Conceptual Design – Construction Plan

Tunnel drives 5 and 6 will include for 174m through Cummer Station and 166m between
Cummer Station and the extraction shaft ES3;

Construction of Cummer Station including entrances and an electrical substation.

Drawing SK025 was developed to show possible contractor site requirements and access.
5 Traffic Management
The Traffic Management Plan will detail vehicular and pedestrian traffic arrangements during the
construction of the Project. The analysis of traffic operations in the Traffic Management Plan will
generally follow the Traffic Impact Study Guidelines prepared by the City of Toronto and York Region.
The complexity of the Traffic Management Plan will also be related to the extent of the construction
contract and the nature of the existing traffic congestion issues in the construction zone. The Traffic
Management Plan will be developed during detailed design.
All elements of a traffic management concept must be approved by the affected road authorities, in
consultation with the Police and Fire Departments and Emergency Medical Services, prior to award of a
construction contract.
Prior to the start of construction, the Proponent will organize information sessions, as required, with the
local community and business groups to explain the construction activities and restrictions, as well as to
establish lines of communication.
Construction and proposed staging procedures will have temporary and/or permanent effects. For each
construction site, a specific construction and staging plan will be developed during detailed design and
will be implemented during construction based on traffic management principles that have been proven
successful on other similar subway construction projects including Sheppard Line and the current TYSSE
project.
The general guidelines and principles that will be followed for traffic management during construction of
the Yonge Subway extension (YSE) include but are not limited to the following:
5.1 Traffic Lanes
Where possible, the existing number of lanes will be preserved at an individual construction site. When
this cannot be achieved, maintaining current or improvements to transit operations should be the first
priority.
As a general guideline, where the road surface must be excavated, the minimum number of lanes of traffic
as noted in Table 5-1, should be provided at all times.
Contract #Y85-9/001
Rev. B, Page 13
Toronto Transit Commission - Yonge Subway Extension (YSE)
Conceptual Design – Construction Plan
Table 5-1: Minimum Number of Lanes to be Maintained
Existing Lanes
Minimum Number of Lanes to be Maintained
1 lane in each direction
1 lane with appropriate controls
2 lanes in each direction
1 lane in each direction
2 lanes in each direction
1 lane in each direction
1
centre
left
(continuous)
turn 1 left turn at signalized intersection
3 lanes in each direction
2 lanes in peak direction
1 lane in off peak direction
3 lanes in each direction
2 lanes in peak direction
1 centre left turn lane 1 lane in off peak direction
(continuous)
1 left turn signalized intersection
5.2 Alternative Traffic Options
Where partial lane closures must occur, traffic operations in the area of the construction, including
appropriate upstream and downstream intersections, will be analysed to assess queue lengths, delays and
general levels of service.
5.3 Road Closures
Where full closure of the road must occur, a suitable road detour will be designated, with the approval of
the appropriate road authorities. Temporary closings of arterial roads may occur during designated time
periods acceptable to the approval authority. In major commercial areas i.e. Centrepoint Mall, later start
times for road closures may be considered for detailed design.
5.4 Turn Lanes
Where lane closures are required at signalized intersections and a left turn lane is presently provided,
provision for left turning vehicles will be provided. If not possible due to construction, approval for the
left turn restriction must be given by the appropriate road authority. If a left turn restriction is allowed,
then a suitable detour route for left turns will be designated.
Contract #Y85-9/001
Rev. B, Page 14
Toronto Transit Commission - Yonge Subway Extension (YSE)
Conceptual Design – Construction Plan
Right turn lanes may be closed and need not be accommodated in the traffic diversion, unless traffic
volumes dictate their permanent need. This will be coordinated with or dictated by the road authority.
5.5 Signing
For all areas of construction, suitable advance signing will be provided. Where lane restrictions will be
present for long periods of time, advance signing will also include appropriate alternate routes to
encourage motorists to avoid the construction area.
5.6 Traffic Signal Adjustments/Timing
Where elements of the traffic signal infrastructure must be adjusted to accommodate traffic diversions or
excavations, the physical relocation will be designed for submittal to the appropriate road authority.
Where lane closures at a traffic signal must occur, there may be a need to adjust the traffic signal timing.
5.7 Transit Operations and HOV Lanes
Maintenance of transit operations are deemed to be the highest priority during any restrictions imposed by
construction. Where possible, a dedicated bus lane should be provided. Requirements during construction
will be coordinated with the transit operator.
HOV lanes will not be provided during construction.
5.8 Pedestrians
A minimum 1.2m pedestrian sidewalk will be provided if a sidewalk currently exists. Where a sidewalk
must be closed for temporary construction work, alternative pedestrian routes with appropriate signage
will be provided.
5.9 Private Access
Access will be maintained to all driveways throughout the construction period, unless suitable
arrangements have been made with the property owner and the appropriate road authority to provide an
alternative access or temporary closure.
6 Construction Schedule
Section 2.2 Contracting Options provides a list of basic contracting options that were considered for the
implementation of the Yonge Subway Extension (YSE). At this time, no overall project constraint dates
have been established or identified.
Section 2.3 Contracting Recommendations therefore adopts one potential set of proposed contracts to be
applied for the Yonge Subway Extension (YSE) so that an overall construction schedule can be
established and approximate durations assigned to various construction activities. Where possible, the
objective is to minimize the potential for claims by limiting the overall number of contracts and
associated contract interfaces.
Drawings SK023 and SK024 provide an overview of the key components needed for the YSE including
proposed locations for launch shafts, extraction shafts and direction of tunnel drives.
Contract #Y85-9/001
Rev. B, Page 15
Toronto Transit Commission - Yonge Subway Extension (YSE)
Conceptual Design – Construction Plan
As noted, the capital cost estimate includes four new TBMs. The assumption is that two tunnelling
contracts will be awarded with the first contract including for tunnel drives No 1 and 2 from a launch
shaft situated at the south end of the Richmond Hill Centre crossover to extraction shaft (ES1) at the north
end of the north approach structure for the East Don River Bridge and the second contract would include
for tunnel drives 3 and 4 from the launch shaft located adjacent to and north of the Steeles Station to
extraction shaft (ES2) at the south end of the south approach structure to the East Don River Bridge and
for tunnel drives 5 and 6 from the launch shaft located at the south end of the Steeles Station crossover to
extraction shaft (ES3) at the north end of the extension of the Finch Tailtrack.
Tunnels will initially be driven through the footprint for Langstaff Station, Clark Station and Cummer
Station. The construction of Langstaff Station will be added to the north tunnel contract. The construction
of Cummer Station will be added to the south tunnel contract. The construction of Richmond Hill Centre
Station, Bus terminal and crossover, Clark Station and Steeles Station, Bus Terminal and ,crossover
would be separate contracts.
7 Critical Path
A preliminary design and a preliminary construction schedule have been prepared (refer attached) that
documents the adoption of the Section 2.3 strategy for contract packaging. The critical path resulting from
the above includes the following general activities:
1. RFP and award of the Geotechnical Investigation;
2. RFP and award for the Design of Cummer Station;
3. Design of Cummer Station;
4. Tender and award for construction of the South Tunnels, Cummer Station and Finch Tail track
Extension (refer Section 2.3, Items 2 and 3);

Construction of Launch Shaft LS2;

Set-up and tunnel drives from LS2 to extraction shaft ES2 located within the south approach
structure at the East Don River Bridge;

Set-up and tunnel drives from LS3 to extraction shaft ES3 located within the extension of the
existing Finch Station tailtrack;

Complete excavation, construct structure and finishing for Cummer Station,
5. Installation of systems work, and
6. Commissioning of the system and tie-in to the existing Yonge Subway.
Contract #Y85-9/001
Rev. B, Page 16
Toronto Transit Commission - Yonge Subway Extension (YSE)
Conceptual Design – Construction Plan
Appendix A
Drawings
Contract #Y85-9/001
Toronto Transit Commission - Yonge Subway Extension (YSE)
Conceptual Design – Construction Plan
Drawing List
Drawing no.
Title
HMM-SK-016
Richmond Hill Launch Shaft - Preliminary Proposed Road Diversion and Modification of
Stormwater Retention Pond
HMM-SK-017
Richmond Hill Launch Shaft - Preliminary Proposed Road Diversion and Modification of
Stormwater Retention Pond - Cross-sections – Sheet 1 of 2
HMM-SK-018
Richmond Hill Launch Shaft - Preliminary Proposed Road Diversion and Modification of
Stormwater Retention Pond – Cross-sections – Sheet 2 of 2
HMM-SK-020
Richmond Hill Centre - Site Areas and Access
HMM-SK-021
Steeles Station and Bus Terminal – Site Areas and Access
HMM-SK-022
East Don River Bridge – Site Requirements
HMM-SK-023
Tunnel- General Arrangement –Sh.1 of 2
HMM-SK-024
Tunnel- General Arrangement –Sh.2 of 2
HMM-SK-025
Finch Station Tail Track Extension & Cummer Station – Site Areas and Access
HMM-SK-031
Steeles Station – Traffic Diversion Scheme – Stage 1
HMM-SK-032
Steeles Station – Traffic Diversion Scheme – Stage 2
HMM-SK-033
Steeles Station – Traffic Diversion Scheme – Stage 3
HMM-SK-036
East Don River Bridge – Traffic Diversion – Stage 1
HMM-SK-037
East Don River Bridge – Traffic Diversion – Stage 2
HMM-SK-039
East Don River Bridge – Traffic Diversion – Stage 2 – Sta. 4+900
HMM-SK-040
East Don River Bridge – Traffic Diversion – Stage 2 – Sta. 5+230
Contract #Y85-9/001
Toronto Transit Commission - Yonge Subway Extension (YSE)
Conceptual Design – Construction Plan
Appendix B
Schedules
Contract #Y85-9/001
Year 9
Year 8
Year 7
Year 6
Year 5
Year 4
Year 3
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
TBM Available
TBM Available
Yonge Subway Extension - Construction Schedule
Mobilization
Excavation
Floating Slab
Structural
Finishing
Civil
Commissioning
Demolition
Drop Shaft
Utilities Reloc
EEB # 8/ Fan Room
EEB#7
Train Storage #2
Bantry Bridge
Train Storage #1
Crossover
Richmond Hill
Station
Substation
Drop Shaft
Launch Shaft LS1
Highway 7 on Ramp
Utilities Relocation
General
EEB # 6
Headwall #1
Langstaff Station
Headwall #2
EEB #5
Substation R.O.
Extraction Shaft ES1
Box Structure #1
East Don River
Bridge
Box Structure #2
Extraction Shaft ES2
EEB # 4
EEB # 3
Headwall #2
Clark Station
Headwall #1
Utilities Relocation
General
EEB # 2
Launch Shaft LS2
Steeles Station
Steeles Bus Terminal
Crossover
Launch Shaft LS3
EEB # 1
Headwall #1
Cummer Station
Headwall #2
Extraction Shaft ES3
Finch Tailtrack Ext
Month
16-Jun-11 15:06
Yonge Subway Extension - Detail Design Sched
Activity ID
Original Start
Activity Name
29-Mar-16
642 01-Mar-12
29-Aug-14
0
86
40
240
260
186
191
722
01-Mar-12*
01-Mar-12
02-Jul-12
28-Aug-12
26-Feb-13
05-Sep-13
02-Dec-13
02-Jul-12
29-Jun-12
27-Aug-12
07-Aug-13
05-Mar-14
29-May-14
29-Aug-14
17-Apr-15
80
490
100
490
100
686
02-Jul-12
24-Oct-12
30-Sep-14
21-Dec-12
25-Nov-14
22-Jan-13
23-Oct-12
29-Sep-14
20-Feb-15
24-Nov-14
17-Apr-15
09-Sep-15
110
120
400
400
771
22-Jan-13
26-Jun-13
17-Dec-13
13-Feb-14
16-Apr-13
25-Jun-13
16-Dec-13
14-Jul-15
09-Sep-15
29-Mar-16
120
90
100
440
834
16-Apr-13
04-Oct-13
13-Feb-14
07-Jul-14
04-Jun-12
03-Oct-13
12-Feb-14
03-Jul-14
29-Mar-16
25-Aug-15
90 04-Jun-12
40 10-Oct-12
576 07-Dec-12
09-Oct-12
06-Dec-12
26-Feb-15
Design to 30%
Design to 60%
Design to 90%
Design to 100%
Tender and Award
120
120
124
100
100
617
07-Dec-12
29-May-13
15-Nov-13
14-May-14
06-Oct-14
08-Jan-13
28-May-13
14-Nov-13
13-May-14
03-Oct-14
26-Feb-15
21-May-15
Design to 30%
Design to 60%
Design to 90%
Design to 100%
Tender and Award
130
130
134
110
100
612
08-Jan-13
11-Jul-13
16-Jan-14
25-Jul-14
02-Jan-15
07-Dec-12
10-Jul-13
15-Jan-14
24-Jul-14
31-Dec-14
21-May-15
17-Apr-15
Design to 30%
Design to 60%
Design to 90%
Design to 100%
Tender and Award
130
130
130
110
100
682
07-Dec-12
12-Jun-13
17-Dec-13
20-Jun-14
25-Nov-14
08-Jan-13
11-Jun-13
16-Dec-13
19-Jun-14
24-Nov-14
17-Apr-15
20-Aug-15
Design to 30%
Design to 60%
Design to 90%
Design to 100%
Tender and Award
150
147
150
120
100
08-Jan-13
08-Aug-13
10-Mar-14
09-Oct-14
01-Apr-15
07-Aug-13
07-Mar-14
08-Oct-14
31-Mar-15
20-Aug-15
Geotechnical Investigations
Project Start
RFP and Award
Geotechnical Work Plan
Geotechnical Investigations (2 or 3 Stages)
Geotechnical Design Reports
Geotechnical Baseline Report(s) Tunnels
Geotechnical Baseline Report(s) Stations
Tunnel Design
A1060
A1070
A1080
A1470
A1480
Design RFP Award
Tunnel Pkg A Design
Tender and Award Tunnel Pkg A
Tunnel Pkg B Design
Tender and Award Tunnel Pkg B
Tunnel Boring Machine
A1100
A1110
A1120
A1125
Prepare Spec
Tender and Award
Manufacture (TBM's A and B)
Manufacture (TBM'sC and D)
Tunnel Segments
A1130
A1140
A1145
A1150
Segment Design
Tender and Award
Plant Mobilization
Manufacture
Station Design
A1160 RFP and Award
A1170 Work Plan
Cummer
A1180
A1190
A1200
A1210
A1220
Clark
A1300
A1310
A1320
A1330
A1335
Langstaff
A1340
A1350
A1360
A1370
A1375
Steeles
A1380
A1390
A1400
A1410
A1460
Summary
Milestone
Critical Milestone
Remaining Work
Critical Remaining Work
Year
1
Duration
1054 01-Mar-12
Design and Procurement
A0010
A1000
A1010
A1020
A1030
A1040
A1050
Finish
2
3
4
5
6
7
8
9
10
01-Mar-12*
RFP and Award
Geotechnical Work Plan
Geotechnical Investigations (2 or 3 Stages)
Geotechnical Design Reports
Geotechnical Baseline Report(s) Tunnels
Geotechnical Baseline Report(s) Stations
Design RFP Award
Tunnel Pkg A Design
Tender and Award Tunnel Pkg A
Tunnel Pkg B Design
Tender and Award Tunnel Pkg B
Prepare Spec
Tender and Award
Manufacture (TBM's A and B)
Manufacture (TBM'sC and D)
Segment Design
Tender and Award
Plant Mobilization
Manufacture
RFP and Award
Work Plan
Design to 30%
Design to 60%
Design to 90%
Design to 100%
Tender and Award
Design to 30%
Design to 60%
Design to 90%
Design to 100%
Tender and Award
Design to 30%
Design to 60%
Design to 90%
Design to 100%
Tender and Award
Design to 30%
Design to 60%
Design to 90%
Design to 100%
Tender and Award
1 of 5
Actual Work
Yonge Subway Extension
Project Schedule
© Primavera Systems, Inc.
16-Jun-11 15:06
Yonge Subway Extension - Detail Design Sched
Activity ID
Original Start
Activity Name
Duration
685 08-Jan-13
Richmond Hill
A1420
A1430
A1440
A1450
A1455
Design to 30%
Design to 60%
Design to 90%
Design to 100%
Tender and Award
Train Storage
A1250
A1260
A1270
A1280
A1290
RFP and Award
Work Plan
Design to 30%
Design 30% to 100%
Tender and Award
Construction
South Tunnels
Utilities relocation
A1490 Utilities Relocation
LS2
A1500
A1510
A1515
A1517
LS2 Mobilization
LS2 Excavation
LS2 Permanent Structure
LS2 Drop Shaft
Tunnel Boring D2
A1519
A1520
A1530
A1540
TBM Available (A and B)
Prepare TBM
Tunnel Boring D2-A1
Tunnel Boring D2-B1
Headwalls
A1624 Clark Station Headwall 1
A1626 Clark Station Headwall 2
ES2
A1550 ES2 Excavation
A1555 ES2 Permanent Structure
A2620 ES2 Drop Shaft
EEBs
A1560
A1570
A1575
A1580
A1590
A1600
A1605
A1610
A1615
EEB # 2 Excavation and Backfill
EEB # 2 Permanent Structure
EEB # 2 Finishing
EEB # 3 Excavation and Backfill
EEB # 3 Permanent Structure
EEB # 4 Excavation and Backfill
EEB # 3 Finishing
EEB # 4 Permanent Structure
EEB # 4 Finishing
Clark Station
A1620
A1630
A1640
A1650
Clark Station Mobilization
Clark Station Excavation
Clark Station Permanent Structure
Clark Station Permanent Finishing
East Don River Bridge
A2470 East Don River Bridge Mobilization
A2480 East Don River Bridge Excavation
A2490 East Don River Bridge Permanent Structure
Summary
Milestone
Critical Milestone
Remaining Work
Critical Remaining Work
Finish
2
3
4
5
6
7
8
9
10
25-Aug-15
150
150
150
120
100
666
08-Jan-13
08-Aug-13
13-Mar-14
14-Oct-14
06-Apr-15
02-Jul-12
07-Aug-13
12-Mar-14
13-Oct-14
03-Apr-15
25-Aug-15
29-Jan-15
86
40
127
320
81
1454
02-Jul-12
01-Nov-12
02-Jan-13
01-Jul-13
03-Oct-14
25-Nov-14
31-Oct-12
31-Dec-12
28-Jun-13
02-Oct-14
29-Jan-15
19-Jun-20
1390 23-Feb-15
19-Jun-20
205 23-Feb-15
04-Dec-15
200 23-Feb-15
524 23-Feb-15
04-Dec-15
23-Feb-17
40
80
60
40
297
23-Feb-15
20-Apr-15
03-Oct-16
29-Dec-16
15-Jul-15
17-Apr-15
11-Aug-15
28-Dec-16
23-Feb-17
01-Sep-16
0
60
170
170
84
15-Jul-15
12-Aug-15
05-Nov-15
06-Jan-16
10-Sep-15
04-Nov-15
07-Jul-16
01-Sep-16
05-Jan-16
40 10-Sep-15
40 05-Nov-15
412 23-Feb-16
04-Nov-15
05-Jan-16
20-Sep-17
60
60
40
546
23-Feb-16
01-May-17
26-Jul-17
11-Aug-15
16-May-16
25-Jul-17
20-Sep-17
12-Sep-17
60
80
60
60
60
60
60
60
60
1101
11-Aug-15
02-Sep-16
29-Dec-16
04-Nov-15
29-Dec-16
05-Jan-16
24-Mar-17
24-Mar-17
19-Jun-17
08-Oct-15
03-Nov-15
28-Dec-16
23-Mar-17
01-Feb-16
23-Mar-17
28-Mar-16
16-Jun-17
16-Jun-17
12-Sep-17
26-Dec-19
60
270
360
380
1090
08-Oct-15
06-Jan-16
27-Jan-17
27-Jun-18
01-Dec-15
05-Jan-16
26-Jan-17
26-Jun-18
26-Dec-19
03-Feb-20
60 01-Dec-15*
110 25-Feb-16
350 01-Aug-16
Year
1
Design to 30%
Design to 60%
Design to 90%
Design to 100%
Tender and Award
RFP and Award
Work Plan
Design to 30%
Design 30% to 100%
Tender and Award
Utilities Relocation
LS2 Mobilization
LS2 Excavation
LS2 Permanent Structure
LS2 Drop Shaft
15-Jul-15
Prepare TBM
Tunnel Boring D2-A1
Tunnel Boring D2-B1
Clark Station Headwall 1
Clark Station Headwall 2
ES2 Excavation
ES2 Permanent Structure
ES2 Drop Shaft
EEB # 2 Excavation and Backfill
EEB # 2 Permanent Structure
EEB # 2 Finishing
EEB # 3 Excavation and Backfill
EEB # 3 Permanent Structure
EEB # 4 Excavation and Backfill
EEB # 3 Finishing
EEB # 4 Permanent Structure
EEB # 4 Finishing
Clark Station Mobilization
Clark Station Excavation
Clark Station Permanent Structure
Clark Station Permanent Finishing
East Don River Bridge Mobilization
East Don River Bridge Excavation
24-Feb-16
29-Jul-16
15-Dec-17
East Don River Bridge Permanent Structure
2 of 5
Actual Work
Yonge Subway Extension
Project Schedule
© Primavera Systems, Inc.
16-Jun-11 15:06
Yonge Subway Extension - Detail Design Sched
Activity ID
Original Start
Activity Name
A2500
A2510
A2520
A2524
A2526
A2530
A2540
A2550
A2553
A2555
A2560
East Don River Bridge Permanent Finishing
Box Structure 1 (East) Excavation
Box Structure 1 (East) Permanent Structure
Box Structure 1 (West) Excavation
Box Structure 1 (West) Permanent Structure
Box Structure 1 Permanent Finishing
Box Structure 2 (East) Excavation
Box Structure 2 (East) Permanent Structure
Box Structure 2 (West) Excavation
Box Structure 2 (West) Permanent Structure
Box Structure 2 Permanent Finishing
LS3
A1670 LS3 Excavation
A1950 LS3 Permanent Structure
A1970 LS3 Drop Shaft
Tunnel Boring D3
A1680 Prepare TBM
A1700 Tunnel Boring D3-A2
A1710 Tunnel Boring D3-B2
Headwalls
A1850 Cummer Station Headwall 1
A1860 Cummer Station Headwall 2
ES3
A1740 ES3 Excavation
A2600 ES3 Permanent Structure
A2630 ES3 Drop Shaft
EEBs
A1720 EEB # 1 Excavation and Backfill
A1730 EEB # 1 Permanent Structure
A1735 EEB # 1 Finishing
Steeles Station
A1750
A1760
A1770
A1780
A1870
A1880
A1890
A1900
A1910
A1920
A1930
A1940
Steeles Station Mobilization
Steeles Station Excavation
Steeles Station Permanent Structure
Steeles Station Permanent Finishing
Steeles Bus Terminal Mobilization
Steeles Bus Terminal Excavation
Steeles Bus Terminal Permanent Structure
Steeles Bus Terminal Permanent Finishing
Crossover Mobilization
Crossover Excavation
Crossover Structure
Crossover Floating Slab
Cummer Station
A1810
A1820
A1830
A1840
Cummer Station Mobilization
Cummer Station Excavation
Cummer Station Permanent Structure
Cummer Station Permanent Finishing
Finch Tailtrack Exit
A1978
A1980
A1990
A2000
Finch Tailtrack Mobilization
Finch Tailtrack Ext Excavation
Finch Tailtrack Ext Permanent Structure
Finch Tailtrack Ext Permanent Finishing
North Tunnels
Summary
Milestone
Critical Milestone
Remaining Work
Critical Remaining Work
Finish
Year
1
Duration
350
150
170
150
150
340
130
170
130
170
340
441
18-Dec-17
25-Feb-16
27-Sep-16
30-May-17
04-Dec-17
06-Jul-18
19-May-16
22-Nov-16
26-Jul-17
31-Jan-18
01-Oct-18
23-Feb-16
02-May-19
26-Sep-16
26-May-17
02-Jan-18
05-Jul-18
05-Nov-19
21-Nov-16
25-Jul-17
30-Jan-18
28-Sep-18
03-Feb-20
31-Oct-17
80
60
40
257
23-Feb-16
12-Jun-17
06-Sep-17
16-Jun-16
14-Jun-16
05-Sep-17
31-Oct-17
09-Jun-17
60
150
150
62
16-Jun-16
12-Sep-16
07-Nov-16
12-Sep-16
09-Sep-16
13-Apr-17
09-Jun-17
06-Dec-16
40 12-Sep-16
40 10-Oct-16
321 07-Oct-16
04-Nov-16
06-Dec-16
29-Dec-17
60
60
40
361
07-Oct-16
08-Aug-17
01-Nov-17
14-Jul-16
04-Jan-17
31-Oct-17
29-Dec-17
30-Nov-17
60
60
60
1223
14-Jul-16
12-Jun-17
06-Sep-17
21-Aug-15
06-Oct-16
05-Sep-17
30-Nov-17
28-Apr-20
60
300
350
480
40
300
450
200
40
330
280
60
1006
21-Aug-15
16-Nov-15
24-Jan-17
08-Jun-18
16-Nov-15
15-Jan-16
21-Mar-17
28-Dec-18
11-Mar-16
06-May-16
22-Sep-17
30-Oct-18
12-Aug-16
13-Nov-15
23-Jan-17
07-Jun-18
28-Apr-20
14-Jan-16
20-Mar-17
27-Dec-18
09-Oct-19
05-May-16
23-Aug-17
29-Oct-18
25-Jan-19
19-Jun-20
60
230
300
390
863
12-Aug-16
07-Nov-16
04-Oct-17
11-Dec-18
16-Jun-16
04-Nov-16
03-Oct-17
10-Dec-18
19-Jun-20
07-Oct-19
40
190
260
350
1413
16-Jun-16
12-Aug-16
12-May-17
22-May-18
25-Nov-14
11-Aug-16
11-May-17
21-May-18
07-Oct-19
23-Apr-20
2
3
4
5
6
7
8
10
9
East Don River Bridge Permanent Finishing
Box Structure 1 (East) Excavation
Box Structure 1 (East) Permanent Structure
Box Structure 1 (West) Excavation
Box Structure 1 (West) Permanent Structure
Box Structure 1 Permanent Finishing
Box Structure 2 (East) Excavation
Box Structure 2 (East) Permanent Structure
Box Structure 2 (West) Excavation
Box Structure 2 (West) Permanent Structure
Box Structure 2 Permanent Finishing
LS3 Excavation
LS3 Permanent Structure
LS3 Drop Shaft
Prepare TBM
Tunnel Boring D3-A2
Tunnel Boring D3-B2
Cummer Station Headwall 1
Cummer Station Headwall 2
ES3 Excavation
ES3 Permanent Structure
ES3 Drop Shaft
EEB # 1 Excavation and Backfill
EEB # 1 Permanent Structure
EEB # 1 Finishing
Steeles Station Mobilization
Steeles Station Excavation
Steeles Station Permanent Structure
Steeles Station Perm
Steeles Bus Terminal Mobilization
Steeles Bus Terminal Excavation
Steeles Bus Terminal Permanent Structure
Steeles Bus Terminal Permanent Finishing
Crossover Mobilization
Crossover Excavation
Crossover Structure
Crossover Floating Slab
Cummer Station Mobilization
Cummer Station Excavation
Cummer Station Permanent Structure
Cummer Station
Finch Tailtrack Mobilization
Finch Tailtrack Ext Excavation
Finch Tailtrack Ext Permanent Structure
Finch Tailtrack Ext Permanent Finishing
3 of 5
Actual Work
Yonge Subway Extension
Project Schedule
© Primavera Systems, Inc.
16-Jun-11 15:06
Yonge Subway Extension - Detail Design Sched
Activity ID
Original Start
Activity Name
Utilities Relocation
A2005 Highway 7 on Ramp Civil Works
A2010 Utilities Relocation
LS1
A2020
A2030
A2200
A2210
Mobilization
Excavation
Launch Shaft Structure
Drop Shaft
Tunnel Boring D1
A2039
A2040
A2050
A2060
TBM Available (C and D)
Prepare TBM
Tunnel Boring D1-C1
Tunnel Boring D1-D1
Headwalls
A2180 Langstaff Station Headwall 1
A2190 Langstaff Station Headwall 2
ES1
A2070 Excavation
A2640 Permanent Structure
A2650 Drop Shaft
EEBs
A2080
A2090
A2095
A2100
A2110
A2115
EEB # 6 Excavation and Backfill
EEB # 6 Permanent Structure
EEB # 6 Finishing
EEB # 5 Excavation and Backfill
EEB # 5 Permanent Structure
EEB # 5 Finishing
Langstaff Station
A2140
A2150
A2160
A2170
Langstaff Station Mobilization
Langstaff Station Excavation
Langstaff Station Permanent Structure
Langstaff Station Permanent Finishing
Richmond Hill Station
A2220
A2230
A2240
A2250
A2260
A2270
A2280
A2290
Richmond Hill Station Mobilization
Richmond Hill Excavation
Richmond Hill Permanent Structure
Richmond Hill Permanent Finishing
Crossover Mobilization
Crossover Excavation
Crossover Structure
Crossover Floating Slab
Train Storage
A2300
A2310
A2320
A2330
A2340
A2370
A2380
A2390
A2410
A2420
A2430
A2435
Train Storage #1 Mobilization
Train Storage #1 Excavation
Train Storage #1 Permanent Structure
Train Storage #1 Floating Slab
Train Storage #1 Permanent Finishing
Train Storage #2 Mobilization
Train Storage #2 Excavation
Train Storage #2 Permanent Structure
Train Storage #2 Permanent Finishing
EEB # 8 Excavation and Backfill
EEB # 8 Permanent Structure
EEB # 8 Finishing
Summary
Milestone
Critical Milestone
Remaining Work
Critical Remaining Work
Finish
Year
1
Duration
269 25-Nov-14
04-Dec-15
190 25-Nov-14
220 26-Jan-15
586 04-May-15
25-Aug-15
04-Dec-15
31-Jul-17
40
80
80
60
351
04-May-15
30-Jun-15
13-Jan-17
05-May-17
10-Sep-15
29-Jun-15
21-Oct-15
04-May-17
31-Jul-17
12-Jan-17
0
60
190
190
61
10-Sep-15
19-Nov-15
17-Feb-16
13-Apr-16
16-Mar-16
16-Feb-16
11-Nov-16
12-Jan-17
08-Jun-16
40 16-Mar-16
40 13-Apr-16
416 13-Apr-16
10-May-16
08-Jun-16
15-Nov-17
60
60
40
544
13-Apr-16
27-Jun-17
21-Sep-17
22-Oct-15
07-Jul-16
20-Sep-17
15-Nov-17
21-Nov-17
60
80
60
60
80
60
1053
22-Oct-15
13-Jan-17
05-May-17
20-Jan-16
05-May-17
29-Aug-17
16-Mar-16
19-Jan-16
04-May-17
31-Jul-17
12-Apr-16
28-Aug-17
21-Nov-17
27-Mar-20
60
240
350
375
1132
16-Mar-16
09-Jun-16
19-May-17
05-Oct-18
22-Oct-15
08-Jun-16
18-May-17
04-Oct-18
27-Mar-20
21-Feb-20
60
260
360
420
60
240
330
60
1365
22-Oct-15
20-Jan-16
27-Jan-17
27-Jun-18
22-Oct-15
20-Jan-16
29-Dec-16
15-May-18
30-Jan-15
19-Jan-16
26-Jan-17
26-Jun-18
21-Feb-20
19-Jan-16
28-Dec-16
16-Apr-18
08-Aug-18
23-Apr-20
60
350
480
60
380
60
350
460
440
60
80
60
30-Jan-15
24-Apr-15
09-Sep-16
01-Aug-18
25-Oct-18
30-Jan-15
24-Apr-15
09-Sep-16
03-Jul-18
22-Jun-15
09-Apr-18
01-Aug-18
23-Apr-15
08-Sep-16
31-Jul-18
24-Oct-18
23-Apr-20
23-Apr-15
08-Sep-16
02-Jul-18
26-Mar-20
15-Sep-15
31-Jul-18
24-Oct-18
2
3
4
5
6
7
8
9
10
Highway 7 on Ramp Civil Works
Utilities Relocation
Mobilization
Excavation
Launch Shaft Structure
Drop Shaft
10-Sep-15
Prepare TBM
Tunnel Boring D1-C1
Tunnel Boring D1-D1
Langstaff Station Headwall 1
Langstaff Station Headwall 2
Excavation
Permanent Structure
Drop Shaft
EEB # 6 Excavation and Backfill
EEB # 6 Permanent Structure
EEB # 6 Finishing
EEB # 5 Excavation and Backfill
EEB # 5 Permanent Structure
EEB # 5 Finishing
Langstaff Station Mobilization
Langstaff Station Excavation
Langstaff Station Permanent Structure
Langstaff Station Perm
Richmond Hill Station Mobilization
Richmond Hill Excavation
Richmond Hill Permanent Structure
Richmond Hill Permanent Finishing
Crossover Mobilization
Crossover Excavation
Crossover Structure
Crossover Floating Slab
Train Storage #1 Mobilization
Train Storage #1 Excavation
Train Storage #1 Permanent Structure
Train Storage #1 Floating Slab
Train Storage #1 Per
Train Storage #2 Mobilization
Train Storage #2 Excavation
Train Storage #2 Permanent Structure
Train Storage #2 Perm
EEB # 8 Excavation and Backfill
EEB # 8 Permanent Structure
EEB # 8 Finishing
4 of 5
Actual Work
Yonge Subway Extension
Project Schedule
© Primavera Systems, Inc.
16-Jun-11 15:06
Yonge Subway Extension - Detail Design Sched
Activity ID
Original Start
Activity Name
Duration
60
60
60
318
A2440 EEB # 7 Excavation and Backfill
A2450 EEB # 7 Permanent Structure
A2455 EEB # 7 Finishing
Bantry Bridge
A2350 Bantry Bridge Demolition
A2360 Bantry Bridge Permanent Structure
Commissioning
A2590 Commissioning
Summary
Milestone
Critical Milestone
Remaining Work
Critical Remaining Work
Finish
Year
1
11-Nov-15
27-Apr-17
24-Jul-17
15-Jun-16
08-Feb-16
21-Jul-17
16-Oct-17
01-Sep-17
60 15-Jun-16
130 02-Mar-17
194 03-Feb-20
08-Sep-16
01-Sep-17
29-Oct-20
194 03-Feb-20
29-Oct-20
2
3
4
5
6
7
8
9
10
EEB # 7 Excavation and Backfill
EEB # 7 Permanent Structure
EEB # 7 Finishing
Bantry Bridge Demolition
Bantry Bridge Permanent Structure
Commissioning
5 of 5
Actual Work
Yonge Subway Extension
Project Schedule
© Primavera Systems, Inc.