Sunnyside Park Revetment Maintenance Project

Toronto and Region Conservation Authority (TRCA), in partnership with the City of Toronto, is undertaking maintenance work on an existing shoreline erosion control structure in Sunnyside Park. This work will provide long-term protection against the hazards of shoreline erosion and address public safety concerns.

Project Location

The Project Area is within Sunnyside Park at the intersection of Parkside Drive and Lake Shore Boulevard West, on the north shore of Lake Ontario, in the City of Toronto. The area of concern is the concrete slab revetment and adjacent trail located south of the Gus Ryder Pool.

The project is being funded in part by the City of Toronto Parks, Forestry and Recreation Division and by Infrastructure Canada’s Disaster Mitigation Adaptation Fund, as part of a City wide shoreline protection effort.

Map showing the location of the construction project area in Sunnyside Park
Location of Project Area in Sunnyside Park. Source: TRCA, 2019

Learn More About the Project

Project Background

Aerial photo showing the Project Area
View of Project Area. Source: TRCA, 2019

Sunnyside Park is part of a continuous stretch of waterfront parklands located along Lake Ontario’s Humber Bay. Once an amusement park in the 1920s, the park is now home to many public amenities including, but not limited to, formal multi-use trails, lake viewing nodes, rowing clubs, sports clubs, picnic areas, playgrounds, and a public pool.

The Project Area consists of a revetment constructed of stacked concrete slabs that are cemented together with poured concrete. This structure, along with breakwaters in Lake Ontario, were initially constructed in the area when the amusement park was in use to prevent erosion of the beach.

Since then, the structure has experienced major deficiencies such as backshore erosion, displacement of fill and undermining of the asphalt on Sunnyside Boardwalk.

These deficiencies have been exacerbated over time from high lake levels in 2017-2019, as well as extreme weather conditions including the April 14/15, 2018 ice storm, and now pose a risk to public safety.

In 2019, TRCA retained W.F. Baird and Associates, a coastal engineering consulting firm, to develop detailed designs for maintenance repairs of the concrete slab revetment to address the ongoing shoreline erosion and public safety hazards.

Photo of the east section of the existing concrete slab revetment in the Project Area
East section of the concrete slab revetment in the Project Area. Source: TRCA, 2019.
Photo of displacement of the concrete slabs and backshore erosion at the west section of the Project Area
Displacement of concrete slabs and backshore erosion at the west section of the Project Area. Source: TRCA, 2019.
Photo of undermining of the Sunnyside Boardwalk within the Project Area
Undermining of the Sunnyside Boardwalk in the Project Area. Source: TRCA, 2019.

Scope of Work

The goal of the project is to restore and enhance the erosion control capabilities of the revetment. The scope/sequence of work for this project includes the following:

  • Site setup, including tree removals, installation of Erosion and Sediment Control (ESC) measures and construction fencing, installation of tree protection, and the establishment of staging/stockpiling areas and construction access route.
  • Removal of the existing structure and rebuilding of a new revetment through placement of armourstone in a stepped configuration
  • Installation of a modified section at the western limit of the new structure that allows for the installation of a floating dock
  • Placement of habitat stones to promote aquatic habitat development
  • Site restoration and demobilization

The proposed modifications will allow the shoreline erosion structure to absorb wave impact and be more resilient to changing to lake levels, as well as promote aquatic habitat enhancement in Lake Ontario.

Construction Information

Work is scheduled to commence on November 22, 2021, pending receipt of all permits and approvals.

Construction activities will also include material deliveries with trucks entering the parking lot located east of the Project Area and material stockpiling on the open grassed area south of the parking lot.

Materials will be transported to the site using smaller equipment along a fenced off access route from the staging/stockpiling area in the parking lot towards the site.

To ensure public safety, a section of the Sunnyside Boardwalk will be closed for the duration of construction activities. To detour around the boardwalk closure, please use the Martin Goodman Trail located north of the Sunnyside Pavilion and Gus Ryder Pool.

Additionally, please note that the lights along the boardwalk south of the pavilion and pool will be shut off for the duration of the project. Refer to the Notice of Construction below for trail closure details.

Public Notices

Notices of Construction will be placed along the Sunnyside Boardwalk and at various locations surrounding the Project Area. Members of the community will also be updated before construction begins. The Notice of Construction is available for viewing at the link below:

Progress Updates

December 10, 2021 – TRCA construction crews have mobilized and site set up has begun, including establishment of perimeter fencing, staging and stockpiling area, tree protection zones, and erosion and sediment control measures. The work area and the trails within it have been closed to ensure public safety.

Photo showing installing of mud mats along the access road
TRCA construction staff preparing site by installing perimeter fencing and mud mats along the access road. Source: TRCA, 2021.

March 25, 2022 – TRCA construction crews continue placement of armourstone along the toe at the east section of the structure. Dredging and modified armourstone placement to allow for the installation of a floating dock at the west limit of the structure is complete.

Armourstone along toe from midsection to west section
Armourstone along toe from midsection to west section. Source, TRCA, 2022.
Floating dock and dredged section at west limit of the structure
Modified section for the installation of a floating dock at west limit of the structure. Source: TRCA, 2022.

April 8, 2022 – In-water works are complete as TRCA construction crews have finished placement of toe stone along the entire length of the structure. Placement of armourstone steps continues along the revetment with approximately 30 metres of the stepped revetment complete to full height.

Construction progress of west and midsection of revetment
Construction progress of west section and midsection of revetment. Source: TRCA, 2022.

April 22, 2022 – Placement of armourstone steps continues along the remaining portion of the revetment. Approximately 65 metres of the stepped revetment is complete to full height.

Construction progress at midsection of revetment
Construction progress at midsection of revetment. Source: TRCA, 2022.

May 13, 2022 – Construction of the stepped armourstone revetment is complete and restoration works are underway.

Please note: the boardwalk will be opened for public use by May 20, 2022. Fencing will remain in place around other areas of the site until restoration works are complete.

Overall completed structure
Overall completed structure. Source: TRCA, 2022.
Restoration progress behind the crest of the structure
Restoration progress behind the crest of the structure. Source: TRCA, 2022.
Restoration progress along the access route
Restoration progress along the access route. Source: TRCA, 2022.

June 8, 2022 – Restoration works are complete with topsoil and grass seed placed along the access road and staging/stockpiling area.

Please note: fencing will remain in place around the restored areas until the end of June to allow the seed to establish and promote grass growth.

Overall condition of the completed stepped revetment structure
Overall condition of the completed stepped revetment structure. Source: TRCA, 2022.
Restoration progress and fencing along the access road
Restoration progress and fencing along the access road. Source: TRCA, 2022.
Restoration progress and fencing along the staging/stockpiling area
Restoration progress and fencing along the staging/stockpiling area. Source: TRCA, 2022.

June 24, 2022 – All TRCA project components are complete including construction of the revetment and site restoration works. The site is now fully open to the public.

Aerial view of the completed revetment
Overall completion of the revetment. Source: TRCA, 2022.

Contact Us

The Planning Team is located at TRCA’s Boyd Field Centre in Vaughan:

Restoration and Infrastructure Division, Erosion Risk Management
9755 Canada Company Avenue
Vaughan, Ontario
L4H 0A3

For more information regarding this project, please contact the Project Manager:

Danielle Dellandrea, Project Manager
Erosion Risk Management
Restoration & Infrastructure
danielle.dellandrea@trca.ca
(416) 786-5064