Connecting the Rose Lithium-Tantalum Mine and Relocating a Segment of the 315-Kv Line
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Connecting the Rose Lithium-Tantalum Mine and Relocating a Segment of the 315-kV Line Environmental Impact Statement Eastmain 1 reservoir March 2018 Produced by Services de communication Hydro-Québec Connecting the Rose Lithium-Tantalum Mine and Relocating a Segment of the 315-kV Line Environmental Impact Statement Hydro-Québec TransÉnergie March 2018 This Environmental Impact Statement was prepared in accordance with Hydro-Québec’s internal guidelines and the directive issued by the Ministère du Développement durable, de l’Environnement et de la Lutte contre les changements climatiques du Québec (MDDELCC) [Québec department of sustainable development, the environment and the fight against climate change]. It describes Hydro-Québec’s project design approach, particularly in relation to community stakeholders, summarizes the many studies that have stemmed from it and explains the choices which resulted in the solution selected. Based on the environmental impact assessment process, Hydro-Québec adopted mitigation or environmental compliance monitoring measures with a view to carrying out the best possible project. This approach, which is specific to Hydro-Québec, is not a substitute for any analysis the MDDELCC may conduct under section 31.1 of the Environment Quality Act. This is a translation of the original French text. Only the French version is official. This study was conducted for Hydro-Québec TransÉnergie by Hydro-Québec Innovation, équipement et services partagés in collaboration with the Vice-présidence – Communications et affaires gouvernementales d’Hydro-Québec. A detailed list of contributors is provided in Appendix A (CD-ROM). Connecting the Rose Lithium-Tantalum Mine and Relocating a Segment of the 315-kV Line Environmental Impact Statement – March 2018 Summary Corporation Éléments Critiques, a mining company, plans to commission the Rose Lithium-Tantalum Mine in the Baie-James region, west of Eastmain 1 reservoir. The Rose facilities will include an open-pit tantalum and lithium mine and waste rock stack, as well as an industrial complex for processing the ore. The future pit will be located beneath the Eastmain-1–Nemiscau 315-kV double-circuit line, which connects Eastmain-1 powerhouse to Nemiscau substation. To enable the mine project to go forward, Hydro-Québec must relocate a 4.1-km segment of the Eastmain-1– Nemiscau line about four kilometres east. The relocated line segment will be supported by 13 four-leg lattice towers resembling those on the existing Eastmain-1– Nemiscau line. In addition, Corporation Éléments Critiques will build a 315/25-kV transformer substation near the Eastmain-1–Nemiscau line to supply its new facilities with electricity. Connecting the customer to the Hydro-Québec grid will require three additional 315-kV current transformers in the Eastmain-1 substation yard. Relocating the 315-kV line segment will make it possible to dismantle the decommissioned segment of the Eastmain-1–Nemiscau line, recommission a borrow pit and open a new quarry. Overall, the impacts of relocating the segment of 315-kV line on the biophysical and human environments will be of minor significance, given the mitigation measures to be implemented. The greatest impacts on the biophysical environment will relate to the loss of forest cover in the relocated line segment’s right-of-way and of potential forest wildlife habitat. Two towers will be built in wetlands, and the foundations of two others will partly encroach on these areas. The towers’ presence will result in the loss of 720 m2 of wetlands. The project will have no adverse effects on special-status plant and wildlife species, or fish habitat. The project’s main impact on the human environment will relate to the presence of the relocated line segment and right-of-way. The relocated line segment will not hinder the pursuit of traditional Cree activities in any way. In terms of landscape, views of the line from the Nemiscau–Eastmain-1 road will be sporadic and sometimes screened by forest vegetation. Work to build the 315-kV line segment, connect the customer to the grid, dismantle a segment of the existing line and add three current transformers to the Eastmain-1 substation will be carried out in fall 2019. The cost of the work is estimated at $10 million. iii 80°0' 78°0' 76°0' 54°0' La Grande-1 Chisasibi La Grande 1 ! reservoir Radisson 315 kV # 54°0' # !! Robert-Bourassa La Grande-2-A La Grande-3 Robert-Bourassa ##! La Grande 3 reservoir reservoir 7 35 kV # 735 kV V # 735 k V Route Transtaïga 735 k Lac Sakami Wemindji Baie James (James Bay) 7 3 5 Lac k V Boyd 7 7 3 Sarcelle 3 5 5 k 7 V V k 3 ! k V V 5 5 k 3 5 k V 7 3 Opinaca 7 reservoir Eastmain # Rivière Opinaca Rivière Eastmain # 52°0' Eastmain-1 ! Eastmain-1-A 315 kV !! Rivière Eastmain Study area Eastmain 1 s e m reservoir a 3 ± J - 1 5 k e 4 i Baie de 5 a 0 V B k 52°0' Rupert V R (Rupert Bay) iv a ière l Nemiscau Waskaganish e Nemaska Rupert ax d # 7 Pont ! 35 kV diversion e t # R u o bays o Albanel u R R t ivière e d ert 7 p u Ru 3 5 Lac No k Nemiscau V r d Lac 7 Mesgouez 3 5 V V 7 k 3 V k k 5 5 5 k V 3 Rivière Nottaway 3 7 7 V Lac k Connecting the Rose Lithium- 5 Evans 3 7 Tantalum Mine and Relocating a Segment of the 315-kV Line Lac Mistassini Project Location Sources: Route du Nord BDTA, 1:250,000, MRN Québec, 2002 Infrastructure Project data: Hydro-Québec, July 2017 ! Generating station (powerhouse) Mapping: WSP File: 3877B_situa_get_002_180213a.mxd ! Construction camp Mistissini ") Airport 0 20 40 km 50°0' Main road Lambert, NAD83 (CSRS) Secondary road March 2018 Other road # Transmission line and substation 78°0' 76°0' 74°0' Oujé-Bougoumou Matagami Document for information purposes only. For any other use, please contact Géomatique at Hydro-Québec Innovation, équipement et services partagés. Chibougamau # Waswanipi Chapais Joutel Connecting the Rose Lithium-Tantalum Mine and Relocating a Segment of the 315-kV Line Environmental Impact Statement – March 2018 Table of Contents Summary .................................................................................................................................. iii 1 Introduction .................................................................................................................... 1-1 1.1 Proponent’s presentation ....................................................................................... 1-1 1.1.1 Hydro-Québec TransÉnergie .................................................................... 1-1 1.1.2 Hydro-Québec Innovation, équipement et services partagés .................... 1-2 1.2 Legal context ......................................................................................................... 1-2 1.3 Hydro-Québec’s environmental policy and guidelines ......................................... 1-2 2 Project Rationale and Description ................................................................................. 2-1 2.1 Project rationale .................................................................................................... 2-1 2.2 Project description ................................................................................................. 2-1 2.2.1 Construction of 315-kV line segment ....................................................... 2-2 2.2.1.1 Technical characteristics ........................................................... 2-2 2.2.1.2 Work methods ........................................................................... 2-4 2.2.2 Dismantling of the existing 315-kV line segment ..................................... 2-7 2.2.3 Related work ............................................................................................. 2-7 2.3 Project cost and work schedule ............................................................................. 2-7 3 Impact Assessment Procedure ....................................................................................... 3-1 3.1 Project description ................................................................................................. 3-1 3.2 Host environment .................................................................................................. 3-1 3.3 Community relations ............................................................................................. 3-2 3.4 Project impact assessment ..................................................................................... 3-2 3.5 Environmental compliance monitoring and follow-up program ........................... 3-2 3.6 Environmental overview of the project ................................................................. 3-3 4 Description of Host Environment .................................................................................. 4-1 4.1 Study area .............................................................................................................. 4-1 4.2 Biophysical environment ...................................................................................... 4-1 4.2.1 Methodology ............................................................................................. 4-1 4.2.2 Local weather conditions .......................................................................... 4-1 4.2.3 Geology, physical geography and surface material .................................. 4-4 4.2.3.1 Geology .................................................................................... 4-4 4.2.3.2 Physical geography ................................................................... 4-5 4.2.3.3 Surface material .......................................................................