Pomona Mills Washout Bank Stabilization Project

Toronto and Region Conservation Authority (TRCA) is preparing to undertake remedial bank stabilization works to protect York Region’s sanitary infrastructure along Pomona Creek, a tributary of the East Don River, in the City of Markham. The main objective of the works are to remediate the failed bank in order to provide underground sanitary infrastructure protection and reduce public safety risks. 

Project Location

The project area is located along a stretch of Pomona Creek, a tributary of the East Don River, northwest of the closet major intersection at John Street and Bayview Avenue. The immediate bank failure is located northeast of the Pomona Valley Tennis Club parking lot, which is found within Pomona Mills Park at 200 John Street, Markham.

Figure 1. Pomona Mills Project Location. Source: TRCA, 2018.
Learn More About This Project

Project Background

In early 2018, the Regional Municipality of York Environmental Services Department advised TRCA of a bank failure near the Region’s Central Collector Sewer in Pomona Mills Park. TRCA’s Erosion Risk Management team immediately initiated hazard monitoring to assess the risk and commenced planning, design and permitting for remedial infrastructure protection and bank stabilization works in March 2018.

Pomona Mills washout in April 2018
Figure 2. Pomona Mills washout in early spring of 2018. Source: TRCA, 2018
Pomona Mills washout in August 2018
Figure 3. Pomona Mills washout with significant vegetation in August 2018. Source: TRCA, 2018.
Scope of Work
  • Development of detailed designs drawings
  • Obtain all necessary permits and approvals to proceed with construction
  • Construction scheduled for late November, pending the receipt of all permits and approvals

Construction Information

To ensure public safety, the northeast portion of Pomona Valley Tennis Club parking lot will be closed during construction. The remaining area of the parking lot and Pomona Mills Park will remain open to the public throughout the construction.

For your safety, please respect all posted construction signs and stay clear of the work areas and equipment. Your cooperation and patience is appreciated.

Public Consultation


Notice of Construction signage has been installed within Pomona Mills Park. Construction notices have been delivered to properties in close vicinity to the project area.

Project Updates

TRCA will be mobilizing the week of November 19, 2018 to proceed with implementation of the remedial works.

Contact Us:

The Project Planning Team is located at TRCA’s Boyd Field Centre Office 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 Phil Wolfraim, Project Manager:
Phil Wolfraim, Project Manager 
phil.wolfraim@trca.on.ca
416.661.6600