Hellyer Mine TSF NATURAL VALUES ASSESSMENT
Total Page:16
File Type:pdf, Size:1020Kb
Hellyer Mine TSF NATURAL VALUES ASSESSMENT 30 October 2017 For Caloundra Environmental obo North Queensland Minerals PLC (CAL008) Andrew North [email protected] Philip Barker [email protected] 163 Campbell Street Hobart TAS 7000 Telephone 03. 6231 9788 Facsimile 03. 6231 9877 Hellyer Mine TSF Natural Values Assessment Summary North Queensland Minerals PLC (NQM) are proposing to bring Hellyer Mine out of Care and Maintenance. Works will involve the reprocessing of tailings currently stored in the main tailings storage facility (TSF). This requires the construction of a new smaller TSF downstream of the existing one. The footprint of the site is mainly vegetated. Caloundra Environmental (acting on behalf of NQM) has engaged North Barker Ecosystem Services to undertake a flora and fauna habitat assessment of the natural values. This report documents the botanical values and terrestrial fauna values of the area in order to provide written recommendations for minimising environmental impact. It also provides supporting information towards relevant approval processes. A study area of approximately 80 ha was investigated. The footprint of the dam wall and inundation area will ultimately occupy approximately 46.5 ha. Vegetation The native vegetation communities within the study area include the following TASVEG classifications: Nothofagus-Atherosperma rainforest (RMT) Nothofagus-Phyllocladus rainforest (RMS) Eucalyptus nitida forest over rainforest (WNR) Eucalyptus nitida over Leptospermum (WNL) Eucalyptus delegatensis forest over rainforest (WDR) Leptospermum lanigerum scrub (SLL) Pure Buttongrass moorland (MBP) Pure Buttongrass moorland with emergent Eucalyptus nitida (MBPEN) No threatened communities listed under the Tasmanian Nature Conservation Act 2002 (NCA) or the Commonwealth Environment Protection and Biodiversity Conservation Act 1999 (EPBCA) will be impacted. Flora No threatened species listed under the Tasmanian Threatened Species Protection Act 1995 (TSPA) is known from, or thought likely to occur, within the Hellyer Mine TSF study area. No species listed under the Commonwealth Environment Protection and Biodiversity Conservation Act 1999 (EPBCA) is known from, or thought likely to occur, within the Hellyer Mine TSF study area. Fauna The spotted-tailed quoll is listed as vulnerable on the EPBCA and rare on the TSPA and is present within the vicinity of the mine. Potential quoll habitat extends across most of the native vegetation within Hellyer Mine lease. The Tasmanian devil is listed as endangered on both the EPBCA and the TSPA and is present within the vicinity of the mine. Potential devil habitat extends across most of the native vegetation within Hellyer Mine lease. The Tasmanian wedge-tailed eagle is listed as endangered on both the EPBCA and the TSPA. The Hellyer Mine lease area is likely to be part of a larger foraging territory, but the TSF footprint has very limited nesting habitat. There is an extremely low likelihood of nests being present within the vicinity of the site. ii North Barker Ecosystem Services CAL008 30/10/2017 Hellyer Mine TSF Natural Values Assessment Other threatened fauna recorded from the vicinity or thought to potentially occur have been considered in this assessment and determined to be extremely unlikely to be affected. Weeds Very few non-native plants are present and these tend to be confined ton areas of disturbance. None of the introduced species are considered significant environmental weeds Plant Pathogens – Phytophthora cinnamomi (PC) Symptomatic evidence of PC is apparent at one location on the edge of the existing TSF. It is quite likely that other occurrences occur elsewhere on the mining lease. Legislative implications: Hellyer Mine TSF is being assessed by Tasmania’s Environmental Protection Agency (EPA) under the Environmental Management and Pollution Control Act 1994. This requires the preparation of a Development Proposal and Environmental Management Plan (DPEMP). Under a bilateral agreement with the Commonwealth Government Matters of National Environmental Significance (MNES) are considered in accordance with the Commonwealth Environment Protection and Biodiversity Conservation Act 1999 (EPBCA). Commonwealth Environment Protection and Biodiversity Conservation Act 1999 The impact to the Tasmanian devil is not considered significant in the context of the extent of habitat in the area and the character of the habitat. Any habitat loss to the Tasmanian devil may trigger a requirement to offset those losses. Measures can be adopted to create key habitats such as artificial dens and enhanced management and monitoring of behaviour in the immediate vicinity of the Hellyer Mine TSF. The Hellyer Mine TSF will not have a significant impact on the ‘vulnerable’ spotted-tailed quoll under the significant impact criteria as Hellyer Mine TSF does not contain an ‘important population’ as defined under this legislation. Localised bogs and sites of impeded drainage have been assessed in terms of whether or not they would qualify as the listed ecological community – Alpine Sphagnum bogs and associated fens. It has been determined that they are not captured within the classification, and that no examples of this community occur in the vicinity. Tasmanian Threatened Species Protection Act 1995 No direct impact to individuals of Tasmanian devil or spotted-tailed quoll is anticipated assuming works can be conducted outside the period when any maternal dens may be occupied. These species have large home ranges and will adjust the ranges accordingly to avoid the site during construction. No other species listed under this legislation were recorded. Weed Management Act 1999. No declared weeds were recorded within the Hellyer Mine TSF area. Recommendations 1. Undertake pre-clearance surveys for spotted-tail quoll and Tasmanian devil dens. Coordinate clearing timing to minimise risk of disturbing animals occupying maternal dens, should they occur on site. 2. Develop a construction environmental management plan that limits the extent and prescribes a method for vegetation clearance, requires on site marking of these boundaries, restricts vehicles outside these areas; include measures for managing run-off and sedimentation. iii North Barker Ecosystem Services CAL008 30/10/2017 Hellyer Mine TSF Natural Values Assessment 3. Reduce the risk of introduction and spread of plant pathogens, and declared and environmental weeds, during and after works, by implementing vehicle hygiene, weed and plant pathogen management and prevention plans. iv North Barker Ecosystem Services CAL008 30/10/2017 Hellyer Mine TSF Natural Values Assessment Acknowledgments Project management: Andrew North Field work and photographs: Andrew North Karen Ziegler Report: Andrew North and Grant Daniels Mapping: Linda Drummond Scat analysis: Danielle Madden-Hallett North Barker Ecosystem Services, 2017. This work is protected under Australian Copyright law. The contents and format of this report cannot be used by anyone for any purpose other than that expressed in the service contract for this report without the written permission of North Barker- Ecosystem Services. v North Barker Ecosystem Services CAL008 30/10/2017 Hellyer Mine TSF Natural Values Assessment Table of Contents 1. INTRODUCTION 1 1.1. Background 1 1.2. Study Area 1 1.3. Methods 4 1.3.1. Background Data Review 4 1.3.2. Field Survey 4 1.3.3. Limitations 5 2. RESULTS - BIOLOGICAL VALUES 5 2.1. Vegetation 5 2.2. Vegetation of Conservation Significance 10 2.3. Species of Conservation Significance 15 2.4. Fauna Species of Conservation Significance 17 2.4.1. Spotted-tailed quoll (Dasyurus maculatus maculatus) 26 2.4.2. Tasmanian devil (Sarcophilus harrisii) 29 2.4.3. Wedge-tailed eagle (Aquila audax spp. fleayi) 33 2.5. Introduced Plants 35 2.6. Plant Pathogens 35 3. SUMMARY OF POTENTIAL IMPACTS TO NATURAL VALUES 37 3.1. Native Vegetation 37 3.2. Threatened Flora 37 3.3. Threatened Fauna 38 3.3.1. Spotted-tailed quoll (Dasyurus maculatus maculatus) 38 3.3.2. Tasmanian devil (Sarcophilus harrisii) 39 3.3.3. Tasmanian wedge-tailed eagle (Aquila audax subsp. fleayi) 41 3.4. Weeds 41 3.5. Plant Pathogens 42 3.6. Legislative implications 42 4. MITIGATION 44 4.1. Native Vegetation 44 4.2. Threatened Flora 44 4.3. Threatened Fauna 44 4.4. Introduced Plants and Pathogens 44 5. CONCLUSION 45 REFERENCES 46 APPENDIX A – PROTECTED MATTERS DATABASE REPORT_N05N8W (9 PG) 49 APPENDIX B – NATURAL VALUES ATLAS REPORT_NVR_1_12-JUL-2017 (30 PG) 58 APPENDIX C – VASCULAR PLANT SPECIES BY COMMUNITY 88 APPENDIX D – VASCULAR PLANT SPECIES 91 APPENDIX E – FAUNA OF HELLYER MINE TSF STUDY AREA 95 APPENDIX F – TASMANIAN DISTRIBUTION OF EPBCA THREATENED FAUNA KNOWN WITHIN 5 KM (IN ORDER OF APPEARANCE IN TABLE 3) 96 vi North Barker Ecosystem Services CAL008 30/10/2017 Hellyer Mine TSF Natural Values Assessment 1. Introduction 1.1. Background North Queensland Minerals PLC (NQM) are proposing to bring Hellyer Mine out of Care and Maintenance. Works will involve the reprocessing of tailings currently stored in the main tailings storage facility (TSF). This requires the construction of a new smaller TSF, occupying 46.5 ha, downstream of the existing one. The plan TSF is to be created in two stages with the footprint of a ‘starter dam’ occupying approximately 50% of the ultimate incarnation. The footprint of the new TSF site is currently mainly vegetated. Caloundra Environmental (acting on behalf of NQM) has engaged North Barker Ecosystem Services to undertake a flora and fauna habitat