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FloodProtec+onandNaturaliza+on

AdeleFreemanTRCA

KenDionTRCA

DonHaleyTRCA

PaulMurrayAECOM

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BriefbackgroundonDonMouthNaturaliza+onand

FloodProtec+onEA(DMNP

EA)

ReviewofRealignedAlterna+vesandPreliminary

Costs

FloodProtec+onPhasingOpportuni+es

Naturaliza+onofFloodplain Summary

Overview

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KeyFeaturesof

DonWatershed

1. Watershedcovers

360sqkm

2. 200yearsofurbaniza+onfrom

southtonorth

3. Landuse:80%urban,

4%agriculture,&

16%naturalcover

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ExtentofFloodingunderRegulatoryStorm

RegulatoryFlood

0

200

400

600

800

1000

1200

1400

1600

1800

normal 1 2 5 10 50 100 Hurricane

Flow

Ra

te(m3/s)

Flood Frequency (years)

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Toestablishandsustaintheform,features,andfunc+onsofanaturalrivermouthwithinthecontext

ofarevitalizedCityenvironmentwhileprovidingflood

proteconuptotheRegulatoryFlood.

Naturalization Flood protectionRevitalized City

Environment

GoalofDonMouthNaturalizaonProject

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DonMouthNaturalizaonProject

OriginalAlternaves-2008

Primary Flow West to IH

Primary Flow South & West toInner Harbour

Primary Flow South to Ship Channel

Ship ChannelInner Harbour

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SummaryofStep4EvaluaonbyObjecve

DiagramtakenfromDonMouthNaturalizaonAndPortLandsFloodProteconProject,chapter5,table5-24

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DMNPEA

Preferred4WS

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AcviessinceEAsubmission

EAsubmi[edinDecember2010 Commentssubmi[edfromstakeholderstoMOEonEA

EAamendedinApril2011toaddressstakeholderconcerns

EAputonholdinJanuary2012un+lSeptember2012

PortLandsAccelera+onIni+a+vebeganinDecember2011toexploretheDMNPEAinthecontextofthefullPortLands

EAwillresumefollowingCityCouncildirec+on

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ChangestoAlternavesAlternative 2 (Based on DMNP EA April 2011)

Move valley systemsouth to allow for

development north ofKeating Channel

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ChangestoAlternavesAlternative 2 (Realigned)

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Alternative 4W (Based on DMNP EA April 2011)

Move valley systemsouth to allow for

development north ofKeating Channel

ChangestoAlternaves

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ChangestoAlternavesAlternative 4W (Realigned)

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Promontorieseliminated to

avoid impact onshipping River mouth

phased toaccommodateexisting uses

Spillway moved toDon Roadway to

create largerdevelopment blocks

Valley system movednorth to create largerdevelopment blocks

Alternative 4WS (Based on DMNP EA April 2011)

ChangestoAlternaves

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ChangestoAlternavesAlternative 4WS (Realigned)

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GrossDevelopment

Area

Don RiverFloodplain

Area

NaturalizedArea

RealignedRealignedRealigned

PreliminaryCosting $400M $375M $350M

Comparisonof

Realigned

Alternaves

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FloodProteconPhasing

Fullbuild-out

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FloodProteconPhasing

Fullbuild-out

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FloodProteconPhasing

Don Roadway and

eastern lands raised

Flood ProtectionLandform

Fullbuild-out

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FloodProteconPhasing

Fullbuild-out

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FloodProteconPhasing

Fullbuild-out

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FloodProteconPhasing

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NaturalizaonOpportunies

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InSummary

Preliminaryresultssuggest: 4WSrealignedshouldbecarriedforwardandtheEA

completed

Firstphaseoffloodprotec+onwillprotectlandswestofCherryStreetnorthandsouthofPolsonQuay

Secondphaseoffloodprotec+onwillprotectover480acresfromfloodingeastofDonRoadway

Publicgreenspaceremainsacri+calelementoftheoverallPortLandsplan

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FloodproteconandnaturalizaonMainTradingFloor

Businessanalysis:economics,marketandfinancingSideTradingFloor

PortLands101MainfloorStudio

Developmentplanningandphasing

ThirdFloor,Pa[yWa[Room

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HAVEYOURSAY

Publicfeedbackworkshops:Tuesday,April36:30to9:30atSt.LawrenceHall

or

Wednesday,April46:30to9:30attheHarbour

CastleWesn

Online:www.portlandsconsultaon.ca