BROADVIEW AND EASTERN FLOOD PROTECTION

Class Environmental Assessment Project

PUBLIC INFORMATION CENTRE #1

DECEMBER 5, 2018 Welcome

• Introduction to the project PRESENTATION AGENDA • Seek your feedback • Part 1: Setting the Stage

• Part 2: Project Background and Context

• Part 3: Project Challenges

• Part 4: Alternative Options

• Part 5: Next Steps PART 1: SETTING THE STAGE

Flooded , as seen from south of the Bloor Viaduct, 1918 Source: City of Archives MUNICIPAL CLASS EA PROCESS

Problem Alternative Design Concepts Environmental Implementation & Opportunity Options for Preferred Study Report Detailed Design Options (ESR)

1 2 3 4 5 PIC #1 PIC #2 ESR review December 5 anticipated anticipated Pending EA March 2019 April 2019 approval & funding INTRODUCTION TO THE AREA INTRODUCTION TO THE AREA

Land Ownership INTRODUCTION TO THE AREA

Lower Don Transformation PART 2: PROJECT BACKGROUND + CONTEXT

Don River flood south of Wilton Avenue, 1920 Source: City of Toronto Archives FLOOD RISK 101

What is a floodplain? The area beside a watercourse that would be covered in water by a flood event.

What is a Regulatory flood? What is a Special Policy Area? REGULATORY FLOOD – HURRICANE HAZEL 1954

1700 That’s a lot of 1600 1500 water! 1400 1300 1200 1100

1000

/s) 3 900 800

Flow (m Flow 700 600 500 400 300 200 100 0 2-Year 5-Year 10-Year 25-Year 50-Year 100-Year 350-Year Regulatory Flood Storm LOWER DON SPECIAL POLICY AREA

• Study Area currently within the Lower Don SPA

• Allows development permitted by existing Official Plan land use designations and policies

• Does not allow for intensified land uses (e.g., commercial to residential, increased density) in the floodplain REDUCING THE LOWER DON FLOOD PLAIN

Lower Don River West Remedial Flood Protection Project – 2005 BEFP (Spill Zone 3) Study Area REDUCING THE LOWER DON FLOOD PLAIN

Flood Protection Landform (Corktown Common) Completed 2012 & Don River Bridge Widening (Completed 2007) - Enables development in the West Don Lands

BEFP Study Area REDUCING THE LOWER DON FLOOD PLAIN

Port Lands Flood Protection and Enabling Infrastructure – Completion 2022

Will Enable Development of Port Lands, Lower Don Area BEFP Study Area

Remaining flood risk following implementation of the Port Lands Flood Protection and Enabling Infrastructure Project REDUCING THE LOWER DON FLOOD PLAIN

Port Lands Flood Protection and Enabling Infrastructure Due Diligence Study Projects previously approved and underway REDUCING THE LOWER DON FLOOD PLAIN

Projects previously approved and underway Port Lands and South of Eastern Transportation and Servicing Master Plan REGULATORY FLOOD INUNDATION WHY NOW?

Why is this project necessary?

Regulatory Flood Water Surface Elevation BROADVIEW AND COMMISSIONERS CLASS EA

Phase 1 Phase 2 TTC RELIEF LINE

Future station entrances (conceptual locations) SMART TRACK UNILEVER PRECINCT SECONDARY PLAN & EAST HARBOR DEVELOPMENT PART 3: PROJECT CHALLENGES

Don River, looking north west across Yonge St. bridge, 1954 Source: City of PROJECT CHALLENGES

Integration with parallel projects PROJECT CHALLENGES Integration with underground infrastructure

Bell Infrastructure (abandoned and active) Enbridge Gas Main (abandoned and active) Imperial Oil, Trans. Northern, & Sun Oil Pipelines Toronto Hydro Water Main Sanitary Sewer Combined sewer

Additionally: • Lower Level Interceptor sewer system • Power lines • Abandoned infrastructure PROJECT CHALLENGES

Subsurface geotechnical conditions for flood protection purposes PART 4: FLOOD PROTECTION STRUCTURES AND LANDFORMS

Hurricane Hazel Cleanup, 1954 Source: Library and Archives WHAT IS A FLOOD PROTECTION STRUCTURE?

Traditional engineering measures that rely on a structural component to hold back water (dams, flood walls, and dykes/berms) WHAT IS A FLOOD PROTECTION LANDFORM?

FLOOD LINE

NOT TO SCALE

FLOOD LINE

TO SCALE

PART 5: ALTERNATIVE OPTIONS

Hurricane Hazel Cleanup, 1954 Source: torontodreamsproject.blogspot.com ALTERNATIVE OPTIONS FOR FLOOD PROTECTION

3. Flood Protection 2. Improving Landform Conveyance

4. Flood 1. Do-Nothing Protection Structure OPTION 1 – DO-NOTHING

Addressing Existing Spill into the Unilever Precinct OPTION 2 – IMPROVING CONVEYANCE – CHANNEL WIDENING

• Amount of widening that could be reasonably implemented ~14m

• Modeling indicated no measurable improvement in upstream conveyance or reduction in flooding north of the railway OPTION 3 – FLOOD PROTECTION LANDFORM – RAMP REMAINS OPTION 3 – FLOOD PROTECTION LANDFORM – RAMP REMOVED OPTION 4 – FLOOD PROTECTION STRUCTURE – RAMP REMAINS OPTION 4 – FLOOD PROTECTION STRUCTURE – RAMP REMOVED PART 6: NEXT STEPS

Hurricane Hazel Cleanup, 1954 Source: historyinphotos.blogspot.com PROJECT COORDINATION

The City of Toronto, TRCA, Waterfront Toronto, Metrolinx, TTC and other Stakeholders are working cooperatively on:

• Design Coordination • Construction planning • Traffic analysis • Communications plan TIMELINE NEXT STEPS/FEEDBACK

• How you use and experience this area – what's important to you?

• Construction or operation?

• Feedback: –E-mail or mail your comment sheet –Website and fill out the comment form –Call Questions & Answers