APPENDIX G.4 Surface Water Quality and Quantity Technical Data Report
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FOOTHILLS ZONE 8 WEST PATH DELIVERY 2023 ENVIRONMENTAL AND SOCIO-ECONOMIC ASSESSMENT APPENDIX G.4 Surface Water Quality and Quantity Technical Data Report FOOTHILLS ZONE 8 WEST PATH DELIVERY 2023 ENVIRONMENTAL AND SOCIO-ECONOMIC ASSESSMENT Foothills Zone 8 West Path Delivery 2023 Surface Water Quality and Quantity Technical Data Report Revision 00 Issued for Use February 2021 Prepared for: Foothills Pipe Lines (South BC) Ltd. Calgary, Alberta Prepared by: Stantec Consulting Ltd. Calgary, Alberta FOOTHILLS ZONE 8 WEST PATH DELIVERY 2023 SURFACE WATER QUALITY AND QUANTITY TECHNICAL DATA REPORT Limitations and Sign-off This document entitled Foothills Zone 8 West Path Delivery 2023 Surface Water Quality and Quantity Technical Data Report was prepared by Stantec Consulting Ltd. (“Stantec”) for the account of Foothills Pipe Lines (South BC) Ltd. (the “Client”) to support the regulatory review process for its Section 214 Application under the Canadian Energy Regulator Act (the “Application”) for approval to construct and operate the Foothills Zone 8 West Path Delivery 2023 Project (the “Project”). In connection therewith, this document may be reviewed and used by the Canada Energy Regulator participating in the review process in the normal course of its duties. Except as set forth in the previous sentence, any reliance on this document by any other party or use of it for any other purpose is strictly prohibited. The material in it reflects Stantec’s professional judgment in light of the scope, schedule and other limitations stated in the document and in the contract between Stantec and the Client. The information and conclusions in the document are based on the conditions existing at the time the document was published and does not take into account any subsequent changes. In preparing the document, Stantec did not verify information supplied to it by the Client or others, unless expressly stated otherwise in the document. Any use which another party makes of this document is the responsibility and risk of such party. Such party agrees that Stantec shall not be responsible for costs or damages of any kind, if any, suffered by it or any other party as a result of decisions made or actions taken based on this document. Digitally signed by Penner, Michelle Date: 2021.02.19 08:40:57 -08'00' Prepared by (signature) Michelle Penner, B.Sc., R.P.Bio Digitally signed by Gail Feltham Date: 2021.02.19 12:24:23 -07'00' Reviewed by (signature) Gail Feltham, B.Sc. Digitally signed by Justin McKeown Date: 2021.02.19 13:32:26 -07'00' Approved by (signature) Justin McKeown, B.Sc., P.Biol FOOTHILLS ZONE 8 WEST PATH DELIVERY 2023 SURFACE WATER QUALITY AND QUANTITY TECHNICAL DATA REPORT Table of Contents ABBREVIATIONS ..................................................................................................................... II 1.0 INTRODUCTION .........................................................................................................1.1 2.0 SPATIAL BOUNDARIES ............................................................................................ 2.1 3.0 METHODOLOGY .........................................................................................................3.1 3.1 DESKTOP ASSESSMENT ...........................................................................................3.1 3.2 IN SITU WATER QUALITY ...........................................................................................3.1 4.0 RESULTS ....................................................................................................................4.1 4.1.1 Surface Water Quality ................................................................................. 4.1 4.1.2 Surface Water Quantity ............................................................................. 4.10 5.0 REFERENCES .............................................................................................................5.1 LIST OF TABLES Table 4.1 Water Quality Data Recorded in the Elko Section LAA .....................................4.5 Table 4.2 Water Quality Data Recorded in the Elko Section RAA .....................................4.8 Table 4.3 Stream Flow Monitoring Stations in the Elk River Watershed (part of 08NH) and Flathead River Watershed (part of 08NP) ..................................... 4.10 Table 4.4 Modeled Mean Monthly Discharge at Watercourses and Drainages Crossed by the Elko Section ...........................................................................4.15 Table 4.5 Existing Surface Water Withdrawals in the Elko Section RAA ......................... 4.17 LIST OF FIGURES Figure 4.1 Surface Water Overview, Elko Section ..............................................................4.3 Figure 4.2 Historical Monthly Discharge Summary for Elk River at Fernie (WSC Station No. 08NK002, Elk River Watershed) ......................................... 4.11 Figure 4.3 Historical Monthly Discharge Summary for Michel Creek Below Natal (WSC Station No. 08NK020, Elk River Watershed) ......................................... 4.12 Figure 4.4 Historical Monthly Discharge Summary for Elk River at Phillips Bridge (WSC Station No. 08NK005, Elk River Watershed) ......................................... 4.13 Figure 4.5 Historical Monthly Discharge Summary Flathead River at Flathead Station (WSC Station No. 08NP001, Flathead River Watershed) ................................ 4.14 i FOOTHILLS ZONE 8 WEST PATH DELIVERY 2023 SURFACE WATER QUALITY AND QUANTITY TECHNICAL DATA REPORT Introduction February 2021 Abbreviations ºC degrees Celsius BC British Columbia CER Canada Energy Regulator DO dissolved oxygen ECCC Environment and Climate Change Canada ESA Environmental and Socio-economic Assessment Foothills Foothills Pipe Lines (South BC) Ltd. km kilometre km² square kilometres LAA Local Assessment Area m metre m³ cubic metres MFLNRORD Ministry of Forests, Lands, Natural Resource Operations and Rural Development mg miligrams Misc Miscellaneous MOE Ministry of Environment NTU nephelometric turbidity units PDA Project Development Area the Project Foothills Zone 8 West Path Delivery 2023 Project RAA Regional Assessment Area ROW right-of-way s second Stantec Stantec Consulting Ltd. TDR Technical Data Report TSS total suspended solids µS/cm microsiemens per centimetre WSC Water Survey of Canada ii FOOTHILLS ZONE 8 WEST PATH DELIVERY 2023 SURFACE WATER QUALITY AND QUANTITY TECHNICAL DATA REPORT Introduction February 2021 1.0 INTRODUCTION Stantec Consulting Ltd. (Stantec) completed surface water quality and quantity desktop reviews in support of Foothills Pipe Lines (South BC) Ltd. (Foothills) application to the Canada Energy Regulator (CER) for the Foothills Zone 8 West Path Delivery 2023 Project (the Project). The Project is comprised of the Elko Section. 1.1 FOOTHILLS ZONE 8 WEST PATH DELIVERY 2023 SURFACE WATER QUALITY AND QUANTITY TECHNICAL DATA REPORT Introduction February 2021 1.2 FOOTHILLS ZONE 8 WEST PATH DELIVERY 2023 SURFACE WATER QUALITY AND QUANTITY TECHNICAL DATA REPORT Spatial Boundaries February 2021 2.0 SPATIAL BOUNDARIES The following spatial boundaries are defined for the surface water quality and quantity assessment for the British Columbia Mainline Loop No. 2 Elko Section: • Project Development Area (PDA) – The PDA is a 75 m wide assessment corridor, which conservatively includes a minimum 32 m wide construction corridor plus up to an additional 43 m for temporary workspace to accommodate construction activities and safe vehicle and equipment movement. For this Project: − The PDA is an approximately 32 km-long and 75 m-wide corridor totaling 236.3 ha in area, consisting of the pipeline right-of-way (ROW) and temporary workspace. • Local Assessment Area (LAA): − The LAA includes the PDA and an area that extends 100-500 m upstream from each watercourse crossing and 300-1500 m downstream from the crossing. − The LAA also includes the PDA and a 100 m buffer for drainages (with no defined channels) and all other surface water bodies (e.g., wetlands). • Regional Assessment Area (RAA): − The RAA includes the PDA and a 15 km buffer around the PDA ending at the upstream watershed boundary if less than 15 km from the PDA. 2.1 FOOTHILLS ZONE 8 WEST PATH DELIVERY 2023 SURFACE WATER QUALITY AND QUANTITY TECHNICAL DATA REPORT Spatial Boundaries February 2021 2.2 FOOTHILLS ZONE 8 WEST PATH DELIVERY 2023 SURFACE WATER QUALITY AND QUANTITY TECHNICAL DATA REPORT Methodology February 2021 3.0 METHODOLOGY 3.1 DESKTOP ASSESSMENT A desktop assessment was conducted to review existing water quality and quantity records within the LAA and RAA and surrounding areas. Surface water quality data was searched using the British Columbia Surface Water Monitoring Sites Interactive Map (Province of British Columbia 2020) and Kootenay Boundary Water Tool (Province of British Columbia 2020; British Columbia [BC] Ministry of Forests, Lands, Natural Resource Operations and Rural Development [MFLNRORD] 2020). Water Survey of Canada (WSC) historical hydrometric data (Environment and Climate Change Canada [ECCC] 2019a), specifically monthly discharges at monitoring stations, were reviewed within sub-sub-drainage areas that pertain to the RAA. The WSC Monitoring stations were selected for review based on their proximity to the RAA and connectivity to the LAA (e.g. directly upstream or downstream). Discontinued stations with older data (pre-1990), seasonal stations, or stations that were not directly upstream or downstream of the LAA were not reviewed. The Kootenay-Boundary Water Tool (BC