New Prosperity Gold-Copper Mine Project Federal Review Panel
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New Prosperity Gold-Copper Mine Project Federal Review Panel Canadian Environmental Assessment Registry #63928 Submission of Fisheries and Oceans Canada July 23, 2013 New Prosperity Gold-Copper Mine Project Federal Review Panel Submission of Fisheries and Oceans Canada Table of Contents Summary ....................................................................................................................................................... 1 Introduction .................................................................................................................................................. 2 Background ............................................................................................................................................... 3 Project Overview ....................................................................................................................................... 3 DFO’s Mandate, Responsibilities and Guiding Legislation ............................................................................ 4 Canadian Environmental Assessment Act ................................................................................................. 5 The Fisheries Act ....................................................................................................................................... 5 Metal Mining Effluent Regulation ............................................................................................................. 6 Environmental Impact Statement Overview ................................................................................................ 7 The Fisheries Resource ............................................................................................................................. 7 Fish Creek Watershed ........................................................................................................................... 7 Lower Fish Creek and Taseko River ....................................................................................................... 9 Wasp Lake, Big Onion Lake, and Beece Creek .................................................................................... 10 Project Review and Risk Assessment .......................................................................................................... 10 Project Effects ......................................................................................................................................... 10 Fish Creek Watershed ......................................................................................................................... 10 Lower Fish Creek and Taseko River ..................................................................................................... 13 Wasp Lake, Big Onion Lake, and Beece Creek .................................................................................... 13 Fish Lake as a Recirculated, Closed System ............................................................................................ 14 Stream Habitat .................................................................................................................................... 15 Lake Habitat ........................................................................................................................................ 20 Adaptive Management Relating to Fish Lake ..................................................................................... 25 Fish and Fish Habitat Compensation Plan ............................................................................................... 28 Fish and Fish Habitat Compensation related to the Fisheries Act ...................................................... 29 Fish and Fish Habitat Compensation related to the Metal Mining Effluent Regulation ..................... 32 Monitoring and Follow-up Plans ............................................................................................................. 33 Conclusion ................................................................................................................................................... 34 References .................................................................................................................................................. 36 Page i New Prosperity Gold-Copper Mine Project Federal Review Panel Submission of Fisheries and Oceans Canada Summary Fisheries and Oceans Canada (DFO) is participating in the environmental assessment of the New Prosperity Mine Project to provide technical expertise and information related to fish and fish habitat to the Federal Review Panel. DFO has reviewed the information on the existing values, predicted Project effects, mitigation, compensation, and adaptive management provided by the Proponent in the Environmental Impact Statement and supplemental information. The project has been redesigned to address the concerns of the previous panel for the preservation of Fish Lake. The Proponent has also offered mitigation and compensation measures to offset the loss of fish habitat associated with direct and indirect effects of the Project. The direct effects are characterized as permanent disturbances associated with Project infrastructure such as the open pit and tailings embankments whereas the indirect effects are characterized as those effects associated with flow reduction on instream habitat. DFO’s review notes the following: • DFO largely agrees that the description of the existing fish habitat features and values in the Fish Lake watershed are adequately characterized by the Proponent. • DFO agrees with the Proponent’s characterization of the direct project footprint and indirect stream flow effects of the Project on fish and fish habitat. • DFO supports the habitat compensation measures/strategies proposed in the compensation plans and recognizes that the compensation and enhancement techniques are generally well understood and have been demonstrated in previous applications as technically feasible and beneficial to fish and/or fish habitats in certain circumstances. • DFO agrees that conceptually, the direct and indirect project effects can be offset through appropriate mitigation and compensation. • DFO has reviewed the proposed recirculation of flows in Fish Lake and has identified risks associated with the effectiveness of the mitigation. There is substantial uncertainty in the long term regarding fish habitat values and ecosystem functioning, which have the potential to reduce fisheries productivity of Fish Lake. • Should the Project proceed to the regulatory stage , DFO would work with the proponent on the required regulatory requirements and technical details pertaining to feasibility and habitat assessments to support a fish habitat compensation plan consistent with DFO’s policy objectives. • Any adaptive management program designed for the Project should include monitoring of potential downstream effects in the Taseko River, uncertainties regarding the lake recirculation system, mitigation for Fish Lake tributary streams, and actions to ensure any required mitigation is applied appropriately. Page 1 New Prosperity Gold-Copper Mine Project Federal Review Panel Submission of Fisheries and Oceans Canada Introduction Fisheries and Oceans Canada (DFO) has prepared this submission to the New Prosperity Gold-Copper Mine Project Federal Review Panel (the Panel) in response to the request from the Panel to attend the public hearing and present DFOs technical review of the potential environmental effects of the New Prosperity Gold-Copper Mine Project (the Project) as proposed by Taseko Mines Limited (the Proponent). The Panel requested that DFO provide relevant information and recommendations to the Panel as they relate to the department’s expertise and mandate. The Panel has requested DFO’s expertise on the following subjects: • Aquatic ecosystems (surface waterbodies including Fish Lake, Beece Creek, Taseko River, Wasp Lake, Big Onion Lake); • Fish and fish habitat; • Water quality and quantity; • Lake productivity; • Lake eutrophication; • Current use of lands and resources for traditional purposes; • Mitigation measures including fish habitat compensation; and • Monitoring and follow-up. The New Prosperity Mine Project is a modification to the previous Prosperity Mine Project proposed by the Proponent in 2009. Following the 2009/2010 environmental assessment of the Prosperity Mine Project by way of Federal Review Panel, the Government of Canada concluded that the project as then proposed was likely to cause significant adverse environmental effects that could not be justified in the circumstances. According to the Terms of Reference for the Federal Panel Reviewing the New Prosperity Gold-Copper Mine Project (May 9, 2012 and revised August 3, 2012), the environmental assessment of the Project is intended to thoroughly assess whether the Project addresses the environmental effects identified in the 2009/2010 environmental assessment of the previous Prosperity Mine Project proposal and thus should make use of the information obtained during the 2009/2010 environmental assessment, to the extent possible. As such, DFO reviewed information prepared by the Proponent in support of the environmental assessment of the Prosperity Mine Project from the 2009/2010 review and of the New Prosperity Mine Project proposal, where relevant. This submission is based on a review and analysis of the information available as of June 28, 2013, including: • The 2009 and 2012 Environmental