Black Creek Environmental Assessment

The Rockcliffe neighbourhood along Black Creek is a highly flood-vulnerable area, and has experienced both riverine and urban flooding during extreme storm events.

In 2014, Toronto and Region Conservation Authority (TRCA) and the City of Toronto completed separate Environmental Assessment (EA) studies that investigated options and recommended measures to reduce riverine and sewer system related flooding.

Click here to download the Environmental Assessment.

Due to the level of flood risk within the Rockcliffe Special Policy Area (SPA) and the use of advanced modelling and mapping technology, TRCA initiated and completed a new 2 Dimensional hydraulic model for the Rockcliffe SPA in 2018. The modelled results indicate that flood remediation solutions proposed in the 2014 EA would not protect vulnerable houses from more frequent flooding, as Lavender Creek is now identified as a significant source of flooding along Hilldale Road. Based on new hydraulic modelling and data collected by TRCA during the July 2013 and August 8, 2018 flood events, the City of Toronto and TRCA have a new understanding of flood conditions within the SPA. New information and modelling has lead the City and TRCA to undertake a Flood Remediation and Transportation Feasibility Study to expand flood protection options, assess those options against traffic and transportation needs, and to develop a roadmap for implementation. 

 

Black Creek Flood Infrastructure Maintenance from 2008-2018

2008: Black Creek Flood Control Channel – Scarlett Road Concrete Panel Replacement

In the channel just downstream of Scarlett Road TRCA replaced 3 concrete panels that had severe cracking.

flood control channel at Scarlett Road
Repaired panels at Scarlett Woods Golf Course.

 


2010: Black Creek Flood Control Channel – Jane Street and Wilson Avenue Channel and Drop Structure Concrete Repairs

TRCA undertook concrete repairs to the channel and drop structure.

repairs to Black Creek flood control channel

 


2013: Black Creek Flood Control Channel Dredging Project – Weston Road to Scarlett Road

TRCA removed vegetation from the channel to restore flood flow capacity.

Black creek flood control channel before dredging
Channel before dredging operations began.
Black Creek flood control channel during dredging
Dredging operation just downstream of Weston Road.
Black Creek flood control channel after dredging
Channel after dredging complete.

 


2014: Black Creek Flood Control Channel Dredging Project – 401 to Queens Drive

TRCA removed vegetation and sediment from the channel to restore flood flow capacity.

Black Creek channel before 2014 dredging
2014 Dredging Project – Before photo.
Black Creek flood control channel after 2014 dredging
2014 Dredging project – After photo.

 


2014: Black Creek Channel Drop Structure Concrete Repair

The drop structure under Scarlett Road was replaced with a new concrete structure.

Black Creek channel drop structure before repair
Drop structure before repair.
Black Creek channel drop structure after repair
Drop structure after repair.

 


2015 – Black Creek Real Time Flood Warning Gauge Installation

A flood warning gauge was installed at Black Creek and Alliance Avenue to provide TRCA’s Flood Warning staff with real-time water levels.

Black Creek channel flood warning gauge

 


2016 – Black Creek Flood Control Channel Guardrail Installation

TRCA installed a new guardrail between Weston Road and Hilldale Road to increase safety for motorists along Humber Boulevard North.

Black Creek flood control channel guardrail
New guardrail along Humber Boulevard North.

Resources


Have questions?

Contact:

Rockcliffe EA Project Coordinator
Toronto and Region Conservation Authority
101 Exchange Avenue, Vaughan ON L4K 5R6
Email: RockcliffeEA@trca.ca
Website: www.trca.ca/rockcliffe