Basement Flooding Study Area 57 (South Scarborough – Highland Creek East)

Basement Flooding Study Area 57 has experienced basement and recurring surface flooding during past extreme storm events. The study area is located in the West Hill and Guildwood Parkway area. The study has determined the contributing factors to surface and basement flooding and recommended solutions to improve the City’s sewer system and overland drainage routes in order to mitigate flooding problems.

Based on investigations of drainage and flooding, the City has evaluated a number of alternative solutions and is recommending:

• Improving catch basin management (new catchbasins, high-capacity inlets, inlet control devices)
• Upsizing storm and sanitary sewers in the area of Morningside Avenue and Danzig Street
• Upgrading the existing storm sewer outfall to Deekshill Park
• Various storm and sanitary sewer upgrades, and storm outfall reconstructions

For more information on the recommended sewer improvements for the area, please view the Public Consultation tab below.

Study Area

Background

During heavy rain, sewers can become overloaded with stormwater runoff. This puts pressure on the City’s sewer systems and overland drainage routes, such as roads, local rivers and streams, which can lead to basement flooding.

Recommended solutions to address flooding included:

• Improving catch basin management (new catchbasins, high-capacity inlets, inlet control devices)
• Upsizing storm and sanitary sewers in the area of Morningside Avenue and Danzig Street
• Upgrading the existing storm sewer outfall to Deekshill Park
• Various storm and sanitary sewer upgrades, and storm outfall reconstructions

Public Consultation

The public had an opportunity to provide feedback on the study recommendations.

Consultation Materials:

• Public Consultation Notice – December 2022
• Study Recommendations 

Study Report

The study was carried out following the requirements for the Master Plan Municipal Class Environmental Assessment (EA) process.

A project file report is available for a 30-day review period from July 11 to August 10, 2023. See the Notice of Study Completion for details.

Project File Report

• Executive Summary
• Chapter 1-3
• Chapter 4
  • Figure Set 1
  • Figure Set 2
  • Figure Set 3
  • Figure Set 4
• Chapter 5
  • Figure Set 5
• Chapter 6-7
  • Figure Set 6

Project File Appendices

• Appendix A – Selected City of Toronto Official Plan Schedules
• Appendix B – Review Agency and First Nations Consultations
• Appendix C – Public Consultation Records and Notices
• Appendix D – Stage 1 Archaeological Assessment
  • Part 1
  • Part 2
• Appendix E – Cultural Heritage Report
• Appendix F – Easement Review
  • Part 1
  • Part 2

To receive study updates by email, contact floodingstudy@toronto.ca and indicate that you would like to be added to the mailing list.