Don Mouth Naturalization and Port Lands Flood Protection Project Environmental Assessment Terms of Reference- January 2005 - August 2006

Naturalizing the mouth of the Don River and providing flood protection to the Port Lands were identified as one of the top priorities for all three levels of government when they first announced the establishment of the Toronto Waterfront Revitalization Corporation in 2001. Planning for this work was initiated in early 2005 when Toronto and Region Conservation (TRCA) and Waterfront Toronto, the project co-proponents, with the commencement of the Environmental Assessment Terms of Reference (EA ToR). The DMNP EA ToR received approval from the Ontario Ministry of Environment on August 17, 2006.

The EA ToR establishes the scope and nature of the Environmental Assessment to be undertaken for the Project at the mouth of the Don River. Renaturalizing the river mouth is a complex endeavour, particularly since the Don is located in an area with a rich cultural heritage and is densely occupied by the roads, bridges, buildings, boats, trails and other infrastructure that is essential to making the city work.

A naturalized Don Mouth will enhance water and land habitat for natural species and create the potential to re-establish wetlands in the area that were lost 100 years ago. The project will also create flood barriers for the Port Lands area which has been identified as one of the greatest flood risks in downtown Toronto.

Numerous groups have been working for years to restore the river mouth because the area has such great significance to the waterfront's revitalization.

Key milestones during the DMNP EA ToR process are available at the following links:

Don Mouth Naturalization and Port Lands Flood Protection Project Environmental Assessment (DMNP EA) September 2006 - April 2011

On December 17, 2010, TRCA and Waterfront Toronto submitted the Final DMNP EA for public, agency and stakeholder review and approval as required under section 6.2(1) of the Environmental Assessment Act and according to the Terms of Reference approved by the Minister of the Environment on August 17, 2006.

This project will transform the existing mouth of the Don River (the "Don Mouth"), including the Keating Channel, into a healthier, more naturalized river outlet to the Toronto Inner Harbour and Lake Ontario, while at the same time removing the risk of flooding to urban land to the east and south of the river. The EA was made available for review between December 17, 2010 and February 11, 2011. A copy of the main report is available at:

  1. Report Cover
  2. Table of Contents
  3. Executive Summary
  4. Chapter 1: Introduction
  5. Chapter 2: Purpose of the Undertaking
  6. Chapter 3: Description of the Potentially Affected Environment
  7. Chapter 4: Description, Evaluation and Rationale for 'Alternatives To' the Undertaking
  8. Chapter 5: Description, Evaluation and Rationale for 'Alternative Methods' of Carrying Out the Undertaking
  9. Chapter 6: Description of the Preferred Alternative
  10. Chapter 7: Step 5: Detailed Assessment of the Preferred Alternative
  11. Chapter 8: Monitoring and Adaptive Environmental Management
  12. Chapter 9: EA Amendment Process
  13. Chapter 10: Consultation Record
  14. Chapter 11: Advantages and Disadvantages

Following the receipt of comments from interested parties, the DMNP EA was amended and resubmitted for approvals on April 11, 2011.

  1. Report Cover
  2. Table of Contents
  3. Executive Summary
  4. Chapter 1: Introduction
  5. Chapter 2: Purpose of the Undertaking
  6. Chapter 3: Description of the Potentially Affected Environment
  7. Chapter 4: Description, Evaluation and Rationale for 'Alternatives To' the Undertaking
  8. Chapter 5: Description, Evaluation and Rationale for 'Alternative Methods' of Carrying Out the Undertaking
  9. Chapter 6: Description of the Preferred Alternative
  10. Chapter 7: Step 5: Detailed Assessment of the Preferred Alternative
  11. Chapter 8: Monitoring and Adaptive Environmental Management
  12. Chapter 9: EA Amendment Process
  13. Chapter 10: Consultation Record
  14. Chapter 11: Advantages and Disadvantages

In September 2011, the review of the DMNP EA was placed on pause in order for the PLAI process to proceed.

A summary of the key milestones throughout the DMNP EA Process occurred as follows:

For more information, please email info@waterfrontoronto.ca
© 2013 Lura Consulting