GOLIATH GOLD PROJECT DRYDEN, ON ENVIRONMENTAL IMPACT STATEMENT Treasury Metals Incorporated 130 King Street West, Suite 3680 Toronto, Ontario M5X 1B1 April 2018 T: (416) 214-4654 F: (416) 599-4959 Treasury Metals Revised EIS Report Goliath Gold Project April 2018 TABLE OF CONTENTS PAGE ACKNOWLEDGEMENTS .......................................................................................................... liii GLOSSARY ................................................................................................................................ liv ACRONYMS, ABBREVIATIONS AND SYMBOLS ..................................................................... lx ENVIRONMENTAL IMPACT STATEMENT SUMMARY ........................................................ ES-i 1.0 INTRODUCTION AND PROJECT OVERVIEW ............................................................. 1-1 1.1 The Proponent ................................................................................................. 1-2 1.1.1 Corporate Management Structure ....................................................... 1-3 1.1.2 Insurance and Liability Management ................................................... 1-4 1.1.3 Occupational Health and Safety Plan .................................................. 1-4 1.1.4 Aboriginal Engagement and Partnering ............................................... 1-5 1.1.5 Environmental Management Plan ........................................................ 1-6 1.2 Project Overview .............................................................................................. 1-7 1.2.1 Project Location ................................................................................... 1-7 1.2.2 Project History ................................................................................... 1-12 1.2.3 Land Tenure ...................................................................................... 1-12 1.2.4 Current Land Uses ............................................................................. 1-13 1.3 Need for the Project ......................................................................................... 1-15 1.4 Project Timeline ............................................................................................ 1-16 1.5 Regulatory Framework ..................................................................................... 1-17 1.5.1 Canada ............................................................................................ 1-17 1.5.2 Ontario ............................................................................................ 1-20 1.5.3 Federal and Provincial Alignment ...................................................... 1-25 1.6 Participants in the Environmental Assessment ................................................ 1-26 1.6.1 Indigenous Communities ................................................................... 1-26 1.6.2 Federal Government .......................................................................... 1-28 1.6.3 Provincial Government ...................................................................... 1-29 1.6.4 Municipal Government ....................................................................... 1-29 1.6.5 Public and Non-governmental Organizations .................................... 1-30 1.7 Document Organization .................................................................................... 1-30 2.0 ASSESSMENT OF ALTERNATIVES ............................................................................ 2-1 2.1 Background ....................................................................................................... 2-1 2.2 Assessment Methodology .................................................................................. 2-1 2.2.1 Project Alternatives .............................................................................. 2-1 2.2.2 Alternatives Assessment Approach ..................................................... 2-2 2.2.3 Indigenous Engagement Regarding the Alternatives Assessment ...... 2-3 TC160516 Page i Treasury Metals Revised EIS Report Goliath Gold Project April 2018 TABLE OF CONTENTS (continued) PAGE 2.2.4 Evaluation Criteria ............................................................................... 2-3 2.2.5 Performance Objectives ...................................................................... 2-3 2.3 Alternatives to the Project .................................................................................. 2-7 2.4 Project Alternatives – Construction and Operations ........................................... 2-8 2.4.1 Mining Method ..................................................................................... 2-8 2.4.2 Tailings Storage Facility and Minewater Pond ................................... 2-13 2.4.3 Waste Rock Management ................................................................. 2-48 2.4.4 Overburden Management .................................................................. 2-52 2.4.5 Processing Method ............................................................................ 2-55 2.4.6 Cyanide Containing Effluent Management ........................................ 2-59 2.4.7 Cyanide Destruction .......................................................................... 2-65 2.4.8 Water Supply ..................................................................................... 2-69 2.4.9 Water Discharge Location ................................................................. 2-74 2.4.10 Watercourse Realignments ............................................................... 2-78 2.4.11 Plant and Infrastructure Location ....................................................... 2-78 2.4.12 Low-grade Ore Stockpile Management ............................................. 2-82 2.4.13 Aggregate Supply .............................................................................. 2-82 2.4.14 Non-hazardous Solid Waste Management ........................................ 2-85 2.4.15 Hazardous Solid Waste Management ............................................... 2-88 2.4.16 Domestic Sewage Management ........................................................ 2-91 2.4.17 Explosives Storage Facility ................................................................ 2-94 2.4.18 Electrical Power Supply ..................................................................... 2-96 2.5 Project Alternatives - Closure ......................................................................... 2-100 2.5.1 Open Pit Closure ............................................................................. 2-101 2.5.2 Underground Closure ...................................................................... 2-104 2.5.3 Waste Rock Storage Area Closure .................................................. 2-105 2.5.4 Tailings Storage Facility Closure ..................................................... 2-107 2.5.5 Buildings and Equipment Closure .................................................... 2-109 2.5.6 Infrastructure Closure ...................................................................... 2-113 2.5.7 Minewater Management and Drainage Closure .............................. 2-117 2.6 Summary of Alternatives ................................................................................ 2-121 3.0 PROJECT DESCRIPTION ............................................................................................. 3-1 3.1 Existing Infrastructure and Facilities ................................................................... 3-1 3.1.1 Roads .................................................................................................. 3-7 3.1.2 Power ................................................................................................... 3-7 3.1.3 Railway ................................................................................................ 3-9 3.1.4 Warehousing and Office Facilities ....................................................... 3-9 3.1.5 Dams and Impoundments .................................................................... 3-9 3.1.6 Natural Gas Pipeline ............................................................................ 3-9 TC160516 Page ii Treasury Metals Revised EIS Report Goliath Gold Project April 2018 TABLE OF CONTENTS (continued) PAGE 3.2 Project Phases and Schedule ............................................................................ 3-9 3.2.1 Site Preparation and Construction Phase .......................................... 3-11 3.2.2 Operations Phase .............................................................................. 3-13 3.2.3 Closure Phase ................................................................................... 3-13 3.2.4 Post Closure (Care and Maintenance) .............................................. 3-14 3.3 Open Pit Mine ................................................................................................... 3-14 3.3.1 Overburden Stripping ......................................................................... 3-14 3.3.2 Surface and Mine Water Management .............................................. 3-14 3.3.3 Open Pit Design ................................................................................. 3-15 3.3.4 Open Pit Mine Operations ................................................................. 3-16 3.4 Underground Mine ............................................................................................ 3-17 3.5 Stockpiles .......................................................................................................