Humber Bay Park East Shoreline Maintenance Project

Toronto and Region Conservation Authority (TRCA), in partnership with the City of Toronto, is undertaking maintenance work on existing shoreline erosion control structures along Lake Ontario within Humber Bay Park East. This work will protect against the hazards of shoreline erosion and address public safety concerns.

Project Location

The project area is located in Humber Bay Park East south of Marine Parade Drive, in the City of Toronto. The area of concern includes two armourstone headlands and a gravel/rubble beach located along the north shore of Lake Ontario.

Project area including location of the armourstone revetments and gravel/rubble beach at Humber Bay Park East. Source: TRCA, 2020.

Learn More About the Project

Project Background

Aerial view
Aerial view of Humber Bay Park East. Source; TRCA, 2016.

Humber Bay Park East was built in the 1970s and 1980s as a lakefill park. The park features a series of erosion control structures to protect the shoreline.

The structures have been monitored since 2006 as part of TRCA’s Erosion Risk Management Program (ERMP). TRCA monitoring records show that the structures have deteriorated over time due to continued exposure to wave activity. Recent events, including record high lake levels in 2017 and 2019, as well as severe winds from the April 14-15, 2018 windstorm event have exacerbated this damage.

The structures are considered to be in failing condition and require major maintenance to return them to a state of good repair.

Western Armourstone Headland

The western headland has experienced significant loss of stone material. Large voids, which threaten the overall stability of the structure, have developed over time as remaining material shifts and settles after stone washes away. Significant scouring due to wave overtopping is also present along the backshore of the structure, placing several park paths and benches at risk and presenting a hazard to public safety.

Western armourstone headland, showing material displacement and backshore erosion. Source: TRCA, 2019.
Eastern limits of the western armourstone headland where the structure has failed and been breached by the lake. Source TRCA, 2019.

Gravel/Rubble Beach

Much of the original protective material on the beach has washed away over time due to continuing wave activity and severe storm events. As a result, undercutting along the backshore has led to erosion along a park trail, placing public safety at risk.

Beach erosion
Encroachment of the beach onto the trail and backshore area, Source: TRCA, 2019.
Backshore erosion along gravel/rubble beach. Source: TRCA, 2019.

Eastern Armourstone Headland

The eastern headland has experienced significant loss of stone material. Material displacement has led to scouring of the backshore and erosion near park pathways, creating a risk to public safety. Lower lying areas where stone has washed away are at greater risk of flooding during elevated lake levels.

Eastern headland erosion
Backshore erosion and material displacement along the eastern headland. Source: TRCA, 2019.
Scouring at transition between eastern headland and beach. Source: TRCA, 2019.

TRCA retained Shoreplan Engineering Limited to develop detailed designs for repair of the existing erosion control structures in order to address ongoing erosion and safety hazards.

Repair works will include repositioning existing material and adding a second layer of armourstone to the headlands, as well as renourishing the beach with new stone material, to provide long-term shoreline protection.

Scope of Work

The general scope of work for the Project includes the following items:

  • Site setup, including installation of Erosion and Sediment Control (ESC) measures and construction fencing, establishment of staging/stockpiling areas, removal of trees within work area, and formalization of access roads
  • Repositioning existing stone material along headlands to create a stable slope
  • Importing new stone material to build a second armourstone layer for increased protection
  • Replenishing beach with new cobble stone
  • Site restoration, including trail repairs, reseeding, and tree plantings

Construction Information

Construction is scheduled to commence mid-November 2021 and is anticipated to be completed by Fall 2025.

Please obey all posted construction signage, exercise caution and stay clear of work areas and equipment. 

The work area, shown in red on the map, will be closed in order to ensure public safety. Construction will start on the east side of the park and proceed westwards. The full work area must be closed in order to isolate site access and staging areas. It is anticipated that the eastern portion of the work area can be reopened to the public once work is complete on that section and construction begins on the west end. Updated work areas and any trail re-openings will be shared as construction progresses.

Map of Humber Bay Park East including project work area and staging/stockpiling areas. Source: TRCA, 2021.
Map of Humber Bay Park East including project work area and staging/stockpiling areas. Source: TRCA, 2021.

Public Notices

Virtual Public Information Session
The City of Toronto hosted a Virtual Public Information Session as part of the Humber Bay Park East Revitalization Project on October 26, 2021. Although this is separate from the Humber Bay Park East Shoreline Maintenance Project, project staff attended the meeting to share construction details regarding the shoreline repair works. A recording is available in the Project Updates section of the City of Toronto Humber Bay Park Master Plan website.

Notice of Construction
Signs with detailed construction information have been posted on-site at applicable park entrances and affected trail routes. Letters will also be circulated to members of the local community. The Notice of Construction is available for viewing below:

Notice of Construction – Sign

Progress Updates

September 1, 2022: Construction of the shoreline on the eastern headland continues. Almost 300 meters of the revetment slope have been installed and over 200 meters of stone has been placed below water.

Aerial view of construction taking place on the eastern headland at Humber Bay Park East, facing southwest. Source: TRCA, 2022.

April 25, 2022: Construction of the shoreline continues with the placement of armourstone along the eastern portion of the project area while TRCA  Aquatic Monitoring and Management staff monitor the presence of fish.

A boat with 4 people electrofishing near the shoreline while construction crew uses an excavator to place rocks along shoreline.
TRCA construction crews continue work along the eastern shore while TRCA Aquatic Monitoring and Management staff monitor the presence of fish. Source: TRCA, 2022.

March 7, 2022: Site setup is complete and reconstruction of the shoreline has commenced at the eastern portion of the project area.

TRCA construction crew at the eastern portion of the project area disassembling the current shoreline protection in order to reconstruct. Source: TRCA, 2022.

January 28, 2022: Site setup continues with the completion of construction access routes across the length of the park.

Installation of construction access on the east side of the park. Source: TRCA, 2022.

December 17, 2021: TRCA crews have been working on establishing access routes throughout the park.

Construction road being installed over a culvert to allow drainage of the ponds. Source: TRCA, 2021.

November 15, 2021: TRCA construction crews have mobilized and site setup has begun, including the trail closures, establishment of perimeter fencing, staging and stockpiling areas, tree protection zones, and erosion and sediment control measures. The work area and trails within it have been closed to ensure public safety.

TRCA construction crews preparing site and staging area with fencing, tree protection zones, and erosion and sediment control measures. Source: TRCA, 2021
TRCA construction crews preparing site and staging area with fencing, tree protection zones, and erosion and sediment control measures. Source: TRCA, 2021

Contact Us

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

Rebecca Salvatore, Project Manager 
Erosion Risk Management
Restoration & Infrastructure Division
rebecca.salvatore@trca.ca
(416) 560-1823