Construction Projects

Rosehill Reservoir Rehabilitation

The City of Toronto will be carrying out waterproofing and structure rehabilitation work on the Rosehill Reservoir at David Balfour Park. These necessary upgrades will help to ensure the structural integrity of the reservoir, extend its service life, and bring the infrastructure to a state of good repair.

News and Updates

Update: January 26th, 2017

The Rosehill Reservoir Rehabilitation team will be completing additional underground utility work in the Rosehill Reservoir area, including in the Pumping Station. This work will take place on Friday, January 27th, 2017, between 7am and 7pm. A small work crew will on site to:

  • Confirm the horizontal alignment of underground utilities;
  • Measure watermain manholes, catch basins, chambers, and valve control boxes; and,
  • Implement temporary field markings, if required to assist with the above tasks.

 

To complete this work, contractor vehicle access to the Pump House via Little Park will be required. There will be no noise or construction equipment associated with this work, and every effort will be made to reduce any inconvenience. The City appreciates your understanding and co-operation.

Rosehill Reservoir Rehabilitation Project Update

Since fall 2015 the project team has enjoyed extensive discussions with many interested stakeholders, including meetings with the Rosehill Garden volunteers, meetings with local residents, a meeting with the Summerhill Residents' Association Board, a presentation to the Summerhill Residents' Association membership, and discussions with other site users. In recent weeks the Rosehill Reservoir Rehabilitation project team has received many comments and questions from local residents. The City is grateful for the time and effort the community is dedicating to this project, and appreciates the feedback provided.

The project team had originally planned to host a Public Open House in November 2016. However, in response to comments received from the community we have decided to postpone this event in order to allow for additional work to be completed. We apologize for this change in schedule, but feel this will afford the project team more time to incorporate feedback.

We will provide updates when a Public Open House date has been set. This event is anticipated to take place in early 2017.

If you would like to receive email updates on the project, please contact Kate Nelischer (knelischer@toronto.ca). 

Notice from Urban Forestry:

The City of Toronto's Urban Forestry Branch has informed the Rosehill Reservoir Rehabilitation project team that they will be removing trees infected with Emerald Ash Borer in the ravine portion of David A. Balfour Park. Additionally, a small number of trees in the Rosehill Reservoir area will be removed. Preparatory work began on Thursday, August 11th, 2016, and tree removals will begin on Monday, August 15th, 2016. Please see the notice prepared by Urban Forestry for further information.

Please feel free to contact Kate Nelischer, Sr. Public Consultation Coordinator, with any questions or comments: knelischer@toronto.ca

We recognize that the Reservoir is located in a residential area and want to ensure that the community is informed and able to share comments and ideas, and ask questions. More information on public consultation will be provided in early 2017, and a public open house will be held.

In the meantime, please send an email to Kate Nelischer if you wish to be added to the project mailing list to receive project updates: knelischer@toronto.ca

On October 13, 2016 the project team was invited to give a presentation to the Summerhill Residents Association on the preliminary state of the project. You can view the presentation slides below. Please note that the timelines in this presentation are outdated. The City is currently working on the engineering design drawings for the rehabilitation work and a phasing plan. In spring 2017 we plan to hold a public meeting where the City will review the planned work with the community. Construction is anticipated to begin between late 2017 and early 2018 and last approximately three years. 

 

Notices:

On October 26, 2015 the City distributed a notice to properties adjacent to David A Balfour Park regarding a tree inventory to be completed in the first few weeks of November. You can view this notice here:

October 26 Notice of Site Work

On November 10, 2015 the City distributed a notice to properties adjacent to David A Balfour Park regarding survey work to be completed from mid-November to mid-December. You can view this notice here:

November 10 Notice of Survey Work

Frequently Asked Questions

ExpandWhat is a reservoir and what does it do?

The Rosehill Reservoir is a ground level structure used for storing drinking water. It is vital in managing water supply and demand, ensuring a constant supply of water during emergencies such as fires, water main breaks, power outages and pumpage failures.

ExpandWhy is the Rosehill Reservoir in need of rehabilitation?

The Rosehill Reservoir is the oldest and largest of 10 ground level reservoirs located across the City, originally built in 1873. It is an enclosed concrete structure that is built into the ground. The roof is sloped and covered with earth and grass. 

The current concrete structure was built in 1966 and has not been rehabilitated since. A condition assessment confirmed that the Rosehill Reservoir now requires upgrades to ensure it remains waterproof and structurally sound. This work will extend the reservoir's service life and bring the infrastructure to a state of good repair.

ExpandWhat is the project timeline?

The City is currently working on the engineering design drawings for the rehabilitation work and a phasing plan. In spring 2017 we plan to hold a public meeting where the City will review the planned work with the community. Construction is anticipated to begin between late 2017 and early 2018 and last approximately three years. 

ExpandWill the public be able to access the park during construction?

Public safety throughout construction is the City's priority. We are making efforts to keep parts of the top of reservoir accessible to the public, which will be accomplished by phasing the construction. Waterproofing work will require the entire top of the reservoir to be closed.

The Vale of Avoca and Little Park will remain open and accessible throughout construction. 

ExpandWill the construction work be noisy and disruptive?

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.

ExpandWhere will construction vehicles enter and exit the site?

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. All trucks will be required to follow a route from the reservoir to the disposal site that is designed to minimize disturbance on the local community and to the areas surrounding the Rosehill Reservoir. Additional details will be available later on in the project process.

ExpandWill there be any changes to the park after construction?

The casual enjoyment of the portion of the David A. Balfour Park on top of the Rosehill Reservoir will not change after upgrades are completed.

The existing reflecting pools will not be reinstated as they could damage the new waterproofing membrane. Additionally, the washroom building will be rebuilt in a slightly different location to protect the reservoir.

A Heritage Impact Assessment of Rosehill Reservoir was completed and includes an assessment of the heritage value of the Centennial Monument, water features, the washroom building, and other elements and offers recommendations on their preservation or replacement. The results of the Heritage Impact Assessment will be shared at a fall public open house.

The project team is aware of the significance of the Centennial Monument and will preserve the sculpture at a new location within the reservoir site. More details of the design will be available at the public open house.

ExpandWill the Rosehill Garden be affected?

Due to the waterproofing requirements of the rehabilitation work, the Rosehill Garden must be removed during construction and reinstated post-construction.

More information on the future of the Garden and other features will be available at the public open house.

ExpandWill trees be removed?

The Rosehill Reservoir Rehabilitation is a major infrastructure project that will require tree removals due to the excavation work required to expose the reservoir structure below ground. All trees located on top of the reservoir and some of those around the perimeter will unfortunately require removal as they are directly within the work zone. 

An arborist report has identified that there are 258 trees within the area around the reservoir. The City's Forestry staff have identified 13 trees that will be removed later this year as part of a separate Hazardous Tree Abatement Program.  These hazardous trees have either been infested with Emerald Ash Borer or have significantly compromised structural integrity.  Of the remaining 245 trees, 55 trees will require removal due to the Rosehill Reservoir Rehabilitation construction works.  Two of the trees have been noted to be in poor health.

The project team is working closely with an arborist, landscape architect, and the City's Forestry staff to develop a plan for tree replacement and planting. Each tree that is removed will be replaced in accordance with the City's Tree By-laws. Tree planting on top of the reservoir will not be permitted in order to protect the reservoir's roof structure and new waterproofing membrane. 

ExpandHow can I stay updated?

If you are interested in the Rosehill Reservoir Rehabilitation project, you can sign up to the project email list to receive updates and notices. To register, please send a request to Kate Nelischer, Sr. Public Consultation Coordinator, at knelischer@toronto.ca