ENVIRONMENTAL ASSESSMENT – DRAFT Lemieux Island Water Purification Plant Intake Improvements – Schedule B Environmental Assessment Prepared for City of Ottawa October 2015 CH2M HILL Canada Limited 1101 Prince of Wales Drive Suite 330 Ottawa ON K2C 3W7 CH2M HILL CANADA LIMITED • COMPANY PROPRIETARY Contents Section Page 1. Introduction ......................................................................................................................... 1‐1 1.1 Background ...................................................................................................................... 1‐1 1.2 Objectives ........................................................................................................................ 1‐1 1.3 Ontario’s Environmental Assessment Act........................................................................ 1‐1 1.4 Municipal Class EA ........................................................................................................... 1‐2 1.4.1 Municipal Class EA Planning Process .................................................................. 1‐2 1.4.2 Municipal Class EA Project Schedules ................................................................. 1‐5 1.5 Canadian Environmental Assessment Act ....................................................................... 1‐6 1.6 Project Approach ............................................................................................................. 1‐6 1.6.1 Phase 1 – Problem/Opportunity Statement ....................................................... 1‐7 1.6.2 Phase 2 – Alternative Solutions .......................................................................... 1‐7 1.6.3 Phase 5 – Implementation .................................................................................. 1‐8 2. Background .......................................................................................................................... 2‐1 2.1 Problem/Opportunity Statement .................................................................................... 2‐1 2.1 Study Area ........................................................................................................................ 2‐1 2.1.1 Lemieux Island .................................................................................................... 2‐1 2.1.2 Lemieux Island Water Purification Plant ............................................................ 2‐2 2.1.3 Ottawa River ....................................................................................................... 2‐3 3. Environmental Inventories ................................................................................................... 3‐1 3.1 Social/Cultural .................................................................................................................. 3‐1 3.1.1 Social ................................................................................................................... 3‐1 3.1.2 Cultural................................................................................................................ 3‐1 3.2 Natural Environment ....................................................................................................... 3‐2 3.2.1 Bathymetry ......................................................................................................... 3‐2 3.2.2 Aquatic and Terrestrial Ecosystems .................................................................... 3‐3 3.2.3 Soil and Groundwater ......................................................................................... 3‐3 3.3 Technical .......................................................................................................................... 3‐3 3.3.1 Geotechnical ....................................................................................................... 3‐3 3.3.2 Ice Conditions ..................................................................................................... 3‐5 4. Alternative Solutions ............................................................................................................ 4‐1 4.1 Identification of Potential Alternatives ............................................................................ 4‐1 4.1.1 Alternative 1: Do Nothing ................................................................................... 4‐1 4.1.2 Alternative 2: Proximity to Shore Intake (Berm Solution) .................................. 4‐2 4.1.3 Alternative 3: Deep Water Intake Under Ice Cover ............................................ 4‐2 4.1.4 Alternative 4: Deep Water Intake Beyond Ice Cover .......................................... 4‐3 4.1.5 Alternative 5: Ice Boom ...................................................................................... 4‐3 4.2 Summary of Alternatives ................................................................................................. 4‐4 5. Short‐Listed Alternatives ...................................................................................................... 5‐1 5.1 Eliminated Long‐Term Alternatives ................................................................................. 5‐1 5.1.1 Alternative 1 ‐ Do Nothing .................................................................................. 5‐1 5.1.2 Alternative 5 – Ice Boom .................................................................................... 5‐1 5.2 Short‐listed Alternatives .................................................................................................. 5‐2 6. Detailed Evaluation of Short‐listed Alternatives .................................................................... 6‐1 6.1 Multi‐Criteria Tool ............................................................................................................ 6‐1 650389_WT0804151025OTT CH2M HILL CANADA LIMITED • COMPANY PROPRIETARY III CONTENTS Section Page 6.2 Multi‐Criteria Analysis Set Up and Evaluation Scoring .................................................... 6‐1 6.2.1 Evaluation Criteria .............................................................................................. 6‐2 6.2.2 Criteria Weightings ............................................................................................. 6‐3 6.2.3 Scoring ................................................................................................................ 6‐4 6.3 Evaluation Summary ........................................................................................................ 6‐4 6.4 Preliminary Recommendation ......................................................................................... 6‐7 6.4.1 Long‐Term Preliminary Recommendation .......................................................... 6‐7 6.4.2 Short‐Term Preliminary Recommendation ......................................................... 6‐7 7. Summary of Impacts and Mitigation Measures ..................................................................... 7‐1 7.1 Long‐term Preliminary Recommendation – Deep Water Intake Beyond Ice Cover ........ 7‐1 7.1.1 Technical Performance ....................................................................................... 7‐1 7.1.2 Project Implementation ...................................................................................... 7‐1 7.1.3 Social Environment ............................................................................................. 7‐3 7.1.4 Natural Environment .......................................................................................... 7‐4 7.1.5 Economics ........................................................................................................... 7‐6 7.2 Short‐Term Preliminary Recommendation – Ice Boom ................................................... 7‐7 7.2.1 Technical Performance ....................................................................................... 7‐7 7.2.2 Project Implementation ...................................................................................... 7‐7 7.2.3 Social Environment ............................................................................................. 7‐7 7.2.4 Natural Environment .......................................................................................... 7‐7 7.2.5 Economics ........................................................................................................... 7‐7 8. Stakeholder Consultation ..................................................................................................... 8‐1 8.1 Notice of Commencement of EA ..................................................................................... 8‐1 8.2 Public Information Centre................................................................................................ 8‐1 8.3 Technical Advisory Meetings ........................................................................................... 8‐1 8.4 Notice of Completion ....................................................................................................... 8‐2 9. References ............................................................................................................................ 9‐1 Appendices A List of Stakeholders and Review Agencies B Notices C Public Information Center Documents Tables 4‐1 Summary of Alternatives 5‐1 Alternative Solution Descriptions 6‐1 Intake Improvements Multi‐Criteria Analysis Parameters 6‐2 Evaluation of Alternatives 6‐3 Alternative Solution Rankings – Multi‐Criteria Analysis Results 7‐1 Construction Selection