Keewatinoow Construction Camp Lagoon and Start-Up Camp – Environment Act Proposal

Manitoba Hydro Keewatinoow Construction Camp Lagoon and Start-Up Camp – Environment Act Proposal Date: March, 2012 Manitoba Hydro Keewatinoow Construction Camp Lagoon and Start-Up Camp Environment Act Proposal Executive Summary Manitoba Hydro is proposing to construct a wastewater treatment lagoon and construction start-up camp (the Project). The purpose of the Project is to provide initial staff accommodations and treatment of wastewater generated at the construction camps during the construction of the Keewatinoow Converter Station (KCS). The project site is located approximately 65 km northeast of the Town of Gillam along the existing Conawapa Access Road. The scope of the Project includes: Construction, operation and decommissioning of the Keewatinoow construction camp lagoon; Construction, operation and decommissioning of the 75 person stage 1 Keewatinoow start-up camp (S1); and Construction of the 350 person stage 2 Keewatinoow start-up camp (S2). Construction activities are anticipated to begin in late spring 2012, following issuance of the Environment Act Licence. With this schedule, the lagoon will be ready for operation in October 2012. The lagoon will be decommissioned following completion of the KCS construction. Overview of Environmental Studies The environmental setting (baseline) for the assessment was characterized using existing information sources and environmental field studies. The information and studies addressed the physical, biological and socio-economic components of the environment. Summary of Environmental Effects The potential environmental effects of the proposed works on the physical, biological and socio-economic components were considered in the assessment. With the selected design, construction sequence and the implementation of the proposed mitigation measures and monitoring programs, the proposed works are not anticipated to result in any significant adverse environmental effects. RPT-2012 03 05_Keewatinoow Lagoon And Work Camp EAP_60215179_Final (2012 03 06).Docx i Manitoba Hydro Keewatinoow Construction Camp Lagoon and Start-Up Camp Environment Act Proposal Acknowledgements The key individuals involved in the production of this environmental assessment are provided below: Manitoba Hydro Kevin Leung, P.Eng. Jodine MacDuff Patrick McGarry Gregory Page, P.Eng. Latoya Duyile, EIT AECOM Stephen Biswanger, P.Eng. Approvals Manager Amber Zilinsky, P.Eng. Environmental Engineer Paul Barsalou, M.Sc., P.Eng. Process Specialist Neil Klassen, CET Project Manager Barb Chaput, P.Eng. Environmental Engineer Heather Buhler, P.Eng. Environmental Engineer North/South Consultants Inc. Kurt Mazur, M.Sc. Aquatic Resources Stacy Hnatiuk, M.Sc. Water Quality Northern Lights Heritage Services Virginia Petch, Ph.D., RPA, EP Heritage Resources RPT-2012 03 05_Keewatinoow Lagoon And Work Camp EAP_60215179_Final (2012 03 06).Docx ii Manitoba Hydro Keewatinoow Construction Camp Lagoon and Start-Up Camp Environment Act Proposal Table of Contents Executive Summary Acknowledgements page 1. Introduction ..................................................................................................................................... 1 1.1 Background .......................................................................................................................................... 1 1.1.1 Existing and Historical Licences ............................................................................................. 1 1.1.2 Project Funding ....................................................................................................................... 1 1.2 Project Purpose ................................................................................................................................... 1 1.3 Scope of Project .................................................................................................................................. 3 1.4 Regulatory Process ............................................................................................................................. 3 1.4.1 Environmental Permits and Approvals ................................................................................... 3 2. Project Description ......................................................................................................................... 4 2.1 Project Location ................................................................................................................................... 4 2.1.1 Existing Land Use/Land Use Designation .............................................................................. 4 2.2 Project Schedule .................................................................................................................................. 7 2.3 Existing Facilities ................................................................................................................................. 7 2.4 Start-Up Camps ................................................................................................................................... 7 2.4.1 Water Supply .......................................................................................................................... 8 2.4.2 Wastewater Treatment ........................................................................................................... 8 2.4.3 Solid Waste Handling ............................................................................................................. 8 2.4.4 Fuel and Chemical Handling and Storage .............................................................................. 9 2.4.5 Decommissioning ................................................................................................................... 9 2.5 Wastewater Treatment Lagoon and Collection System ...................................................................... 9 2.5.1 Design ................................................................................................................................... 10 2.5.1.1 Camp Populations .............................................................................................. 10 2.5.1.2 Projected Flows and Loads ................................................................................ 10 2.5.1.3 Anticipated Effluent Quality ................................................................................ 11 2.5.1.4 Wastewater Treatment Lagoon Capacity ........................................................... 12 2.5.2 Construction .......................................................................................................................... 13 2.5.2.1 Wastewater Treatment Lagoon .......................................................................... 13 2.5.2.2 Control Structure ................................................................................................ 13 2.5.2.3 Outfall ................................................................................................................. 13 2.5.2.4 Lift Station and Forcemain ................................................................................. 14 2.5.2.5 Truck Dump ........................................................................................................ 14 2.5.2.6 Access Roads ..................................................................................................... 14 2.5.2.7 Fencing ............................................................................................................... 15 2.5.2.8 Winter Lagoon Storage ...................................................................................... 15 2.5.3 Operation .............................................................................................................................. 15 2.5.3.1 Phosphorus Removal – Alum Dosing ................................................................ 15 2.5.3.2 Operator Requirements ...................................................................................... 15 2.5.3.3 Discharge ........................................................................................................... 16 2.5.3.4 Sludge Disposal.................................................................................................. 16 2.5.4 Decommissioning ................................................................................................................. 16 2.5.5 Chemical and Fuel Storage .................................................................................................. 18 2.5.6 Maintenance Activities .......................................................................................................... 18 2.5.7 Borrow Source ...................................................................................................................... 19 RPT-2012 03 05_Keewatinoow Lagoon And Work Camp EAP_60215179_Final (2012 03 06).Docx Manitoba Hydro Keewatinoow Construction Camp Lagoon and Start-Up Camp Environment Act Proposal 2.5.8 Project Alternatives ............................................................................................................... 19 2.5.8.1 Construction Camps ........................................................................................... 19 2.5.8.2 Wastewater Treatment ....................................................................................... 19 3. Assessment Approach ................................................................................................................. 21 3.1 Geographic Boundaries ....................................................................................................................

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