A preliminary overview of the City of Toronto's Rosehill Reservoir Rehabilitation project.

1. Rosehill Reservoir Rehabilitation
Overview Presentation
October 2016

2. Project Team
• Engineering & Construction Services
• Ken Koson, Sr. Project Manager
• Toronto Water
• Mike Brannon, Manager, Water Supply
• Henry Polvi, Sr. Engineer, Water Supply
• Public Consultation Unit
• Kate Nelischer, Sr. Public Consultation Coordinator
• Associated Engineering
• Elia Edwards, Project Manager
• Anna Comerton, Assistant Project Manager

3. Rosehill Reservoir - Background
The open-topped Rosehill Reservoir was commissioned
in 1874 with a storage capacity of 156 Million Litres of
potable water.
Aerial photo, 1947Open Reservoir, July 1936

4. Rosehill Reservoir – Background (cont.)
In 1966, the reservoir was expanded to a storage capacity
of 270.3 Million Litres and the structure was covered.
Reservoir Construction, 1965 Covered Reservoir, 1975

5. Rosehill Reservoir – Background (cont.)
The Rosehill Reservoir is the largest of eleven potable
water reservoirs operated by the City of Toronto.
• Consists of two cells (West and East)
• Operates 24 hours per day and 365 days per year
• Stores and distributes potable water provided by the
Island Water Treatment Plant (WTP)
• Primarily serves the downtown core and mid-town
• One of only two reservoirs in downtown area (St. Clair
Reservoir is the other)

6. Rosehill Reservoir – Distribution Map
Island WTP
Rosehill
Reservoir
St. Clair
Reservoir

7. Rosehill Reservoir and David A. Balfour Park and Trail
David A. Balfour
Park and TrailRosehill
Reservoir

8. Rosehill Reservoir Infrastructure
West
Reservoir Cell
East
Reservoir Cell
Valve
House
Access
House
Reservoir
Structure
Potable
Watermains
Storm Sewer
System
Reservoir
Footing Drain
System

9. Rosehill Reservoir – Rehabilitation Needs
• The Rosehill Reservoir was last upgraded in 1966
• Due to the age and critical nature of the reservoir
infrastructure, rehabilitation and upgrades are required to:
• Ensure the structural integrity of the reservoir
• Extend the service life of the reservoir
• Bring the infrastructure to a state of good repair
• Additionally, a new reservoir roof waterproofing
membrane is required to protect the stored potable water
from infiltration and contamination

10. Rosehill Reservoir – Goal
The Rosehill Reservoir Rehabilitation project is a vital part
of the City of Toronto’s drinking water infrastructure. The
goal of this project is to bring the reservoir to a state of
good repair and extend its service life.
While completing this important work, Toronto Water will
work with other City Divisions to consider the community’s
desires for the future of the reservoir roof and maintain
the public’s enjoyment of the space.

11. Rosehill Reservoir Rehabilitation Project -
Design Phase
Design
Kick-Off
Tender
Fall
2015
Winter
2017
Fall
2016
Spring
2016
Winter
2016
Summer
2016
Design Phase
Spring
2017
Throughout the design phase, the project team delivered notices, sent information to the project
email list, updated the project webpage, posted site signage, and met with stakeholder groups
(including the SRA board and the Rosehill Garden volunteers).

12. Rosehill Reservoir – Existing Features
West Cell
East Cell
Little Park
Rosehill
Garden
Playground
Perimeter
pathway around
reservoir
Parks, Forestry
& Recreation
Storage Yard
and Building
Vale of
Avoca and
Ravine Trail
Public
Washroom

13. Reservoir Features with Heritage Elements as
Identified in Heritage Impact Assessment
Valve House
Access House
Public Washroom
Centennial Monument Sculpture
Centennial Plaque

14. Construction Phase 1 – Pedestrian Access
(Approx. Summer 2017 to Summer 2018)
Temporary concrete
walkway (pending TRCA
approval)
Existing pedestrian
crosswalk
Existing pedestrian
crosswalk
Sidewalk on north side
of Rosehill Ave.
(sidewalk on south side
will be closed
throughout
construction)
Perimeter
pathway
Little Park
East Cell
operating to
maintain
water supply
Park over West
Cell closed and
West Cell not
operating
Access point for
deliveries to Valve
House
Temporary site access
point for storm sewer
rehab to minimize tree
impact
Main site access point

15. Construction Phase 2 – Pedestrian Access
(Approx. Summer 2018 to Winter 2019)
Perimeter
pathway
Little Park
Park over East
Cell closed and
East Cell not
operating
Park over West
Cell closed but
West Cell
operating
Temporary concrete
walkway (pending TRCA
approval)
Existing pedestrian
crosswalk
Existing pedestrian
crosswalk with push-
button activated lights
Sidewalk on north side
of Rosehill Ave.
Access point for
deliveries to Valve
House
Main site access point
Temporary closure of
playground required
during Phase 2 to
safely accommodate
storm sewer rehab
(approx. 4 months)

16. Construction Phase 3 – Pedestrian Access
(Approx. Winter 2019 to Fall 2020)
Park pathway
Little Park
Park pathway
(open upon
re-opening of
portion of park
over West Cell)
Access via pathway to East and South of Reservoir from Rosehill Ave. restored during Phase 3 (weather dependent)
West Cell
operating
Park over East
Cell closed and
East Cell not
operating
Temporary concrete
walkway (pending TRCA
approval)
Existing pedestrian
crosswalk
Existing pedestrian
crosswalk with push-
button activated lights
Sidewalk on north side
of Rosehill Ave.
Access point for
deliveries to Valve
House
Playground open
Main site access point

17. Challenges
With any construction project, some dust and noise is
inevitable.
The contractor will be responsible for ensuring the work
area is kept cleaned with weekly sweeping and wetting of
the site and roads.
Every effort will be made to reduce inconveniences to the
community.

18. Truck Traffic During Construction
Trucks will be required to dispose of some of the soil from the
top of the reservoir and bring new soil when the work is
done. The City is working to minimize the impacts of truck
traffic on the neighbourhood using the following measures:
• Approximately 40% of soil will be reused on-site
• Trucks will follow a route designed to minimize disturbance
• A maximum of three trucks per hour will be permitted
• Truck traffic will be restricted to Monday to Friday between
7 am and 7 pm, as per City by-laws
• Daily road and sidewalk cleaning will be implemented

19. Tree Removal and Protection
Of the 258 trees within the reservoir area:
• 189 trees will be preserved;
• 14 trees will be removed in 2016 by City of Toronto Forestry due to Emerald Ash
Borer (not related to the Rosehill Reservoir Rehabilitation)
• Approximately 55 trees will be removed and replaced.
We are confident the 189 trees can be preserved using a variety of construction
techniques. Removed trees will be replaced as per City policy. Trees will not be
replanted on top of the reservoir roof.
We have tried to balance the need to improve the reservoir to provide safe drinking
water with the preservation of the tree canopy.

20. Tree Removal and Protection (cont.)
• Routine tree pruning within anticipated construction limits
performed by City of Toronto Forestry until construction
begins
• The project team is working with staff managing
memorial program to address any memorial trees,
benches or rocks requiring removal and contacting
sponsors.

21. Proposed Concept

22. Proposed Site Concept – Main Entrance

23. Proposed Site Concept – Main Entrance

24. Consultation and Communications
• Notices of site works delivered to study area starting in late 2015
• Email list established in late 2015 and growing
• Project website established in late 2015 and updated continuously
with public notices and project FAQs
• Website: www.toronto.ca/rosehill
• Site signage installed in Spring 2016
• Meetings and conversations with stakeholder groups
• Project business cards distributed on-site
• Upcoming Public Open House

25. Project Signage

26. Anticipated Project Schedule
Task 2016 2017 2018 2019 2020
Q
4
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4
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1
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4
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3
Q
4
Rosehill Reservoir Rehabilitation
Design
Tender and Award of
Contract
Construction

27. Stay Involved
There are a number of ways you can participate in the
Rosehill Reservoir Rehabilitation project and stay updated:
• Submit comments via email or phone
• Speak to a project team member
• Sign-in to be added to the project email list or contact
Kate (knelischer@toronto.ca)
• Attend the upcoming Public Open House
• Visit the project website for information and updates:
www.toronto.ca/rosehill

28. Proposed Concept