West Deane Park Bank Stabilization Project

Toronto and Region Conservation Authority (TRCA), in partnership with the City of Toronto, is undertaking bank stabilization and minor trail re-alignment works at two sites (Site 1 and Site 2) in the north end of West Deane Park. The purpose of these works will be to protect the multi-use trail and municipal infrastructure from the erosive forces of Mimico Creek.

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 Project Location

Map showing ortho imagery and locations of Site 1 and Site 2.
Locations of Site 1 and Site 2 for West Deane Park Bank Stabilization Project. Source: TRCA, 2017.

Project Background

Erosion issues have been a concern at Site 1 for some time, especially since the west edge of the multi-use trail washed into Mimico Creek (see Figure 1). In February 2016, the City of Toronto contacted TRCA to help address the issues at Site 1 as well as find a short-term solution from bank erosion at Site 2 (Figure 2) caused by the eastward migration of the watercourse.

Looking upstream at bank erosion on right side and temporary fencing along eroded trail.
Figure 1. West Deane Park Bank Stabilization Project Site 1. Source: TRCA, 2017.
Watercourse on right with asphalt trail at top of bank on left.
Figure 2. West Deane Park Bank Stabilization Project Site 2. Source: TRCA, 2017.

Scope of Work

Site 1:
Work will begin at Site 1 with the construction of the bank stabilization measures involving the installation of large to medium sized stones and dormant brush layers in the area of the erosion. Following the bank work, there will be minor trail re-alignment to the east and the installation of a post-and-paddle fence along the top of bank. Once completed, work will begin at Site 2.

Site 2:
Site 2 is located approximately 200 metres south of Site 1 where currently there is a bench and birch trees.
Because the watercourse continues to migrate to the east, the trail will be re-aligned further away from the top of bank in this area.

Paving and Restoration:
During favourable weather in the spring of 2017, the new trails at Site 1 and Site 2 will be paved. As well, shrubs will be planted along the top of bank at both sites to compensate for the necessary tree removals and so as to provide additional stability to the soil.

Construction Information

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

The multi-use trail between Eglinton Avenue West and north of the playground off of Antioch Drive will be closed for the duration of work, which is anticipated to last 4-5 months (see Figure 3). Access to/from Antioch Drive to the multi-use trail south of the work area will be kept open. The parking lot off Antioch Drive remains closed and will be used for construction activities.

Trail Closure Locations Around Work Site
Figure 3. West Deane Park Bank Stabilization Project trail closure location.

Public Consultation

Project information signage has been erected throughout West Deane Park and notices, like the one found at the link below, have been delivered to a number of properties adjacent to the work area.

WestDeanePark_NoPC

Contact Us

For more information about this project, please contact Sarah Gates, Project Coordinator at sgates@trca.on.ca or 416-392-9690.

Current News

Week of March 20, 2017
Over the past couple weeks, crews completed Phase 2 of the vegetated rock buttress and removed the metrebag cofferdam marking the end of the in-water works. Next week, work on the top of bank will start and will include placing an armourstone wall on the east side of the trail, minor trail re-alignment and the installation of a chain link and post-and-paddle fence.

On March 20-21, City of Toronto staff were on-site to reinstate the booms in the water at the end of the concrete channel and at the outfall after they had been removed. These will act to prevent the deleterious substance, witnessed at the time, from moving downstream of the area.

Week of March 6, 2017
Phase 1 is now complete (see picture below) and crews have moved the metre bags over to isolate the work area for Phase 2.
After a fish rescue and the water is pumped down, work on the vegetated rock buttress at Phase 2 will start.

Stone on bank of watercourse
Completed vegetated rock buttress at Phase 1.

Week of February 27, 2017
Construction of the vegetated rock buttress at Phase 1 continues with stones being placed along the bottom portion of the bank.
A friendly reminder that stone and other materials continue to be delivered to the site so it’s prudent to comply with all posted signage and stay clear of the work site.

Week of February 20, 2017
Heavy-duty geotextile bags known as metre bags have been filled with gravel and placed into the watercourse to isolate the work area from the watercourse and reduce sediment release when the bank is excavated. TRCA staff from the Environmental Monitoring and Data Management group were on site to remove any fish within the cell as part of the Ministry of Natural Resources and Forestry (MNRF) permit requirements.

This cell marks the beginning of Phase 1 for the construction of the vegetated rock buttress which consists of the placement of of differently sized, large stones and dormant willow stakes.

Week of January 30, 2017

All fencing and erosion and sediment control measures have been erected and installed. The trees that were cleared through the Ravine and Natural Feature permitting process have been removed to accommodate construction activities and the alignment of the new trail at Site 1.
Metre bags that will be used for in-water isolation measures are being filled in the parking lot and will be placed in the watercourse early next week.

Week of January 23, 2017
Site set-up is currently underway and includes the installation of 6 foot high construction fencing to isolate the work area and erosion and sediment control measures.