Thunder Bay Stormwater Management Plan for Sustainable Surface Water Management

Thunder Bay Stormwater Management Plan for Sustainable Surface Water Management

THUNDER BAY STORMWATER MANAGEMENT PLAN FOR SUSTAINABLE SURFACE WATER MANAGEMENT APRIL 2016 VOLUME II: Plan Appendices This project has received funding support from Environment Canada and the Ontario Ministry of Environment and Climate Change. Such support does not indicate endorsement by Environment Canada or the Ontario Ministry of Environment and Climate Change of the contents of this material. Ce projet a reçu le soutien fi nancier du Environnement Canada et le Ministère de l’Environnement et de l’Action en matière de changement climatique. Ce soutien n’indique pas l'approbation par Environnement Canada ou le Ministère de l’Environnement et de l’Action en matière de changement climatique du contenu de la matériel. Thunder Bay Stormwater Management Plan Prepared by Emmons & Olivier Resources, Inc. (EOR) w a t e r e c o l o g y c o m m u n i t y Emmons & Olivier Resources, Inc. City of Thunder Bay Stormwater Management Plan – Vol. II April-2016 TABLE OF CONTENTS APPENDIX A Related Studies, Plans and Reports............................................................................... 1 APPENDIX B Land Use Determination ............................................................................................... 9 APPENDIX C Public Participation & Consultation Plan .................................................................... 10 1 Steering Committee ........................................................................................................................... 11 2 City Council ..................................................................................................................................... 15 3 City Division Staff Meetings ............................................................................................................... 15 4 Public Meetings .................................................................................................................................. 15 4.1 Special Interest Group ................................................................................................................ 15 4.2 Public Open House and Engagement .......................................................................................... 17 4.3 Aboriginal Communities .............................................................................................................. 18 4.4 Development Community ........................................................................................................... 18 APPENDIX D Model Development ................................................................................................... 19 1 Introduction 19 1.1 Objectives.................................................................................................................................... 21 1.2 Scope ........................................................................................................................................... 21 1.2.1 Base Models ........................................................................................................................ 21 1.2.2 Northwest Arterial Golf Links Feasibility-Level Model ........................................................ 21 2 Base Models 22 2.1 Model Development ................................................................................................................... 22 2.1.1 Data Collection .................................................................................................................... 22 2.1.2 Model Platform ................................................................................................................... 28 2.1.3 Data Processing ................................................................................................................... 28 2.1.4 Parameterization................................................................................................................. 29 2.2 Model Results ............................................................................................................................. 34 2.2.1 Current River ....................................................................................................................... 34 2.2.2 Kaministiquia River ............................................................................................................. 37 2.2.3 McIntyre River ..................................................................................................................... 41 2.2.4 McVicar Creek ..................................................................................................................... 43 2.2.5 Mosquito Creek ................................................................................................................... 45 2.2.6 Neebing River ...................................................................................................................... 46 2.2.7 Pennock Creek .................................................................................................................... 49 2.3 Discussion .................................................................................................................................... 49 2.4 Recommendations ...................................................................................................................... 50 2.4.1 Data Collection .................................................................................................................... 50 2.4.2 Development of Comprehensive Watershed Management Models .................................. 55 2.4.3 Costs .................................................................................................................................... 57 2.4.4 Implementation .................................................................................................................. 58 Page: i City of Thunder Bay Stormwater Management Plan – Vol. II April-2016 3 Northwest Arterial Golf Links Feasibility-Level Model ....................................................................... 59 3.1 Background ................................................................................................................................. 61 3.2 Rainfall and Design Storms ......................................................................................................... 62 3.3 Existing Conditions ...................................................................................................................... 62 3.4 Proposed Conditions ................................................................................................................... 68 3.4.1 Scenario 1: No Stormwater Management Controls ........................................................... 68 3.4.2 Scenario 2: Universal Site Plan Control .............................................................................. 70 3.4.3 Scenario 3: Low Impact Development (Preserving the Original Site Layout) .................... 73 3.5 Estimated Costs ........................................................................................................................... 75 3.6 Water Quality Benefits ................................................................................................................ 77 3.7 Discussion .................................................................................................................................... 78 3.7.1 LID Upfront Coordination .................................................................................................... 78 3.8 Recommendations ...................................................................................................................... 82 4 Conclusion 83 5 References 84 Attachment 1: Tables .................................................................................................................................. 86 APPENDIX E IDF Curves Development & Climate Change Assessment .......................................... 97 1 Executive Summary ............................................................................................................................ 97 2 Data Available for Analysis ................................................................................................................. 98 3 IDF Development .............................................................................................................................. 100 3.1 Definition of IDF ........................................................................................................................ 100 3.2 Current IDF availability .............................................................................................................. 100 3.3 IDF Curve Generation Methodology ......................................................................................... 101 3.4 IDF Curve Analysis Summary ..................................................................................................... 103 4 Climate Change Analysis .................................................................................................................. 111 5 References ................................................................................................................................... 113 APPENDIX F Inventory of Retrofit BMP Opportunities & Cost-Benefit Analysis ........................... 115 Page: ii City of Thunder Bay Stormwater Management Plan – Vol. II April-2016 LIST OF FIGURES Figure 1. Watershed Location Map ............................................................................................................................

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