South Canal Bank Road and South Canal Reconstruction at Highway 400 Presentation for MTO Executive Review January 30, 2018 - K. Smart Associates ...
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South Canal Bank Road and South Canal
Reconstruction at Highway 400
Presentation for MTO Executive Review
January 30, 2018
2014 2017
K. Smart Associates Limited
By Kenn Smart P. Eng.
Background
South Canal of the Holland Marsh system in the vicinity of Hwy 400 remains to be
relocated/improved as per the requirements of the 2009 Engineering report, prepared by K. Smart,
pursuant to the Drainage Act and passed into Bylaw in 2010.
This is one of only three remaining items of work to complete the requirements of the 2009 Report.
This work was originally included as part of Contract 2015-2004 (Hwy 400/9 Interchange
Reconstruction and South Canal Bridge Replacement) but was later removed to reduce the risk to
the MTO contract.
At MTO’s request, the Holland Marsh Drainage System Joint Municipal Services Board (the
“Board”) agreed to tender the work as a separate contract for construction in 2018 once MTO has
sufficiently completed the South Canal bridge replacement.
The work will be paid 100% by MTO to fulfill their obligation under the Drainage Act.
Road design and preliminary drainage design was originally prepared by MTO’s design consultant
(URS/AECOM/Golder) and then finalized by the Board’s consultant, K. Smart.
Canal realignment design is as required by 2009 Drainage Act Report (Peto Geotech).
2
Background - Continued
Design and construction of Work will undertaken by the Board in accordance with the following
legal agreements between the Ministry and the Board:
▪ April 2015 MOU which outlined the general principles of the agreement, including the fact that the
Board would complete the design and tender the work as an independent contract, subject to approval
by MTO, and at the cost of MTO.
▪ January 2017 MOU which covered the Design component of the work.
▪ One final Legal Agreement is currently being finalized to cover Construction and Contract
Administration Services which requires Minister’s approval.
The 90% Review Meeting with MTO was held on January 15, 2018.
The canal and road realignment (to base course asphalt) must occur within a very limited time
period from June to Nov 2018. If necessary, surface course asphalt may be placed in 2019.
Wist Road and Davis Road must be opened prior to fall harvest and South Canal Bank Road
must be opened by late 2018 to allow work to proceed on MTO North Canal Bridge replacement
contract in 2019.
3
2009 Aerial
Of
Highway 400
Crossing Over
South Canal Bank
Road and South
Canal Prior to
Canal and
Highway Work
4
2017 Aerial to
show:
a) Canal
reconstruction
completed in
2010/2011
b) Highway 400
construction
and South
Canal Bridge
replacement
in progress
5
South Canal Bank Road Looking West
Below Highway 400 (Sept. 2014)
6
South Canal Bank Road Looking West
Below Highway 400 (June 2017)
7
Scope of Work
Realignment of South Canal (270 m) to match realigned canal sections east and west of
Highway 400 in 2010/2011
Realignment of South Canal Bank Road (370 m) to allow road to be lowered 1.7m± to give
5.15m± clearance below new Highway 400 deck girders
Reconstruction of Davis Road (160 m) and Wist Road (60 m) to match lowered South Canal
Bank Road
All roads to have 2 – 3.5m lanes of asphalt with 50mm surface and 70mm base asphalt,
450mm granular and SSM subgrade
Drainage to be a combination of standard road side ditches and culverts except where sections
of subdrain, swales and manholes are required due to utilities and/or constrained space
Construction of new pumping station (two 3-HP pumps), including oil grit separator and two
overflow culverts, to minimize occasions of road flooding
Construction of new generator station, including one 600 volt 3-phase natural gas generator for
backup power
Installation of flood warning system with water level sensors and wireless feed to King
Township and Board
8
Existing
Section
extracted
from 2009
Engineering
Report
Proposed
Section
Extracted
from 90%
Submission
9
Overview of
Proposed
Canal
Construction
10Overview of
Proposed
South Canal
Bank Road
Reconstruction
11Final Canal
and Road
Construction
as Proposed
12Details of Construction Work and Timing
Work has been subdivided into 8 Stages:
Stage Estimated Timing Description Activities
1 Late May/Early Canal dewatering - Install two transverse cofferdams 270m apart to
June± 2018 isolate canal & four turbidity curtains to control
sediment
- Fish collection and relocation
- Canal dewatering
- Road closures and detours remain as currently
signed (right through to Stage 4)
2 June± Remaining bridge & - Remove balance of 1 pier, 1 pile cap in full, 1
canal removals and pile cap partially, sheet wall bracing, sheet
longitudinal cofferdam walls, canal sediments
construction (start of - Construct new canal banks where in route of
new canal north bank old canal (also called “longitudinal cofferdams”)
work) - Start foundation for pumping and generator
stations
13Details of Construction Work and Timing-Cont’d
Stage Estimated Timing Description Activities
3 June and July± Canal excavation - Excavate new canal
- Complete north bank including flood
berm
- Complete all in-ground pumphouse and
generator station work
- Introduce flows into new canal
- Remove transverse cofferdams
4 August± SCBR (East) and Wist - Excavate for roads
Road reconstruction to - Construct roads (to top of granular) and
granular drainage
- Complete pumphouse
- Change road closures and detour
signage (Wist intersection is closed but
Davis intersection remains open)
14Details of Construction Work and Timing-Cont’d
Stage Estimated Timing Description Activities
5 September± SCBR (West) and Davis - Excavate for and construct roads (to top of
Road reconstruction to granular) and drainage
granular - Complete generator station
- Change road closures and detours (Wist
Road intersection is reopened)
6 October± SCBR Central (below - Excavate for and construct road (to top of
Hwy 400) granular) and drainage
- Change closures and signage back to
current configuration
- Connect pumping station and generator
station (both Wist and Davis intersections
are open)
7 November± Base course asphalt, - Complete all remaining work to allow
topsoil and seeding substantial completion and removal of detour
and road closure signage
8 May/June 2019 Surface course asphalt - Complete surface course paving and all 15
remaining activities to finalize workDetails
of
Pumping
Station
16Details
of
Pumping
Station-
Cont’d
17Details of Pumping Station – Cont’d
Capacity of pumping station and culverts:
▪ Even for a 100mm one-hour rainfall, if canal levels are normal – no road flooding
▪ With same 100mm rain localized event and both overflow culverts already closed off due to high canal
level, maximum road flooding is expected to be 150mm
▪ Worst case scenario of canals already at highest recently recorded level and a 100 year storm event
over full marsh watershed, max. flooding on road is expected to be 670mm.
Two stage flood warning system to be constructed, both triggered by sonar sensors within
pumphouse.
▪ First level is a “caution” which will be activated when water levels are 300 to 400 mm below lowest
part of South Canal Bank Road.
▪ King Township will be notified electronically.
▪ If King deems it necessary, sawhorse barricades (stored in generator station building) will be placed
before the red second level “Road Closed” beacons are activated.
▪ Second level will be activated when water levels are within 50mm of the lowest point of the road.
18Details of
Generator
Station
19Details of Generator Station-Cont’d
20Environmental Approvals
DCR by MTO - All work is pursuant to the November 2014 DCR
DFO Authorization - $125,000 Letter of Credit filed by the Board
- Authorization expected January/February 2018
- Will allow pre June 15 in-canal work
MOECC re PTTW and - PTTW and EASR not expected to be required
EASR
LSRCA Permits - Blanket permit already obtained for all canal work
MNRF Permits - Only permit necessary is that for fish relocation (Scientific Collector’s
Permit) – to be obtained by Contractor
Migratory Birds - Season is set at April 15 to August 15
- No clearing required except of brush
- Nesting surveys to be undertaken prior to any clearing
Species at Risk - Mitigation for Barn Swallows (May 31-Aug 31) has already been installed
under MTO contract (bird kiosk)
- Ongoing monitoring will occur during construction, as needed, to avoid
harassment of birds at South Canal structure
21Estimate of Costs
General (Mob., Insurance, Traffic, Layout, etc.) $ 173,000
Canal work 668,475
Road and drainage work 872,800
Pumping station 178,175
Generator station 94,900
Flood warning system 75,000
Construction contingencies 120,000
Contract Administration (10%) 218,235
TOTAL ESTIMATED COSTS: $ 2,400,585
22Target Dates
February 2018 - Complete tender package
- Obtain Encroachment permit from MTO
- Applications for Hydro and Gas services by Board
- Receipt of DFO approval
March 2018 - Tendering (invitational)
April 2018 - Review of tenders by Board and MTO
- Contract Award
May 2018 - Start up of construction (cofferdams and dewatering)
provided no constructor issues with Contract 2015-2004
June to November 2018 - Construction to substantial completion Stage 7
May/June 2019 - Stage 8 and final completion 23You can also read
