Yarren Hut Solar Farm
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BIODIVERSITY DEVELOPMENT ASSESSMENT REPORT Yarren Hut Solar Farm June 2020 Project Number: 19-754 Biodiversity Development Assessment Report Yarren Hut Solar Farm DOCUMENT VERIFICATION Project Title: Yarren Hut Solar Farm Project Number: 19-754 Project File Name: 19-754 Yarren Solar Farm BDAR FINAL Revision Date Prepared by Reviewed by Approved by Version 1 10/06/2020 B. True (BAAS 18155) B. Noel (BAAS 19015) B. Marshall NGH Consulting prints all documents on environmentally sustainable paper including paper made from bagasse (a by-product of sugar production) or recycled paper. Biodiversity Development Assessment Report Yarren Hut Solar Farm TABLE OF CONTENTS Executive Summary ...................................................................................................................................... viii 1. Introduction ............................................................................................................................................ 1 1.1. The proposal ............................................................................................................................................ 1 1.2. The development site .............................................................................................................................. 2 1.2.1. Development site location ........................................................................................................ 2 1.2.2. Development site description ................................................................................................... 2 1.3. The study aims ........................................................................................................................................ 5 1.4. Source of information used in the assessment ....................................................................................... 5 2. Landscape features ............................................................................................................................... 6 2.1. IBRA bioregions and subregions ............................................................................................................. 6 2.2. NSW Landscape regions and area ......................................................................................................... 6 2.3. Native vegetation ..................................................................................................................................... 6 2.4. Cleared areas .......................................................................................................................................... 7 2.5. Rivers and streams.................................................................................................................................. 7 2.6. Wetlands .................................................................................................................................................. 8 2.7. Connectivity features ............................................................................................................................. 10 2.8. Areas of geological significance ............................................................................................................ 10 2.9. Areas of Outstanding Biodiversity Value ............................................................................................... 10 2.10. Site context components ....................................................................................................................... 12 3. Native vegetation within the development site ................................................................................ 14 3.1. Native vegetation extent ........................................................................................................................ 14 3.2. Exotic vegetation ................................................................................................................................... 14 3.3. Land category assessment ................................................................................................................... 14 3.4. Plant community types (PCTs) .............................................................................................................. 17 3.4.1. Methods to assess PCTs ....................................................................................................... 17 3.4.2. PCTs identified on the development site ............................................................................... 18 3.5. Vegetation integrity assessment ........................................................................................................... 22 3.5.1. Vegetation zones and survey effort ....................................................................................... 22 3.5.2. Paddock trees ........................................................................................................................ 25 3.5.3. Vegetation integrity assessment results ................................................................................ 27 4. Threatened species ............................................................................................................................. 28 4.1. Ecosystem credit species ...................................................................................................................... 28 4.1.1. Species excluded from the assessment ................................................................................ 31 NGH Pty Ltd | 19-754 - Version 1 | i Biodiversity Development Assessment Report Yarren Hut Solar Farm 4.2. Species credit species ........................................................................................................................... 31 4.2.1. Candidate species to be assessed ........................................................................................ 31 4.2.2. Inclusions based on habitat features ..................................................................................... 37 4.2.3. Candidate species requiring confirmation of presence or absence ....................................... 37 4.3. Candidate Species Survey .................................................................................................................... 37 4.4. Additional habitat features relevant to prescribed biodiversity impacts ................................................ 41 4.4.1. Occurrences of karsts, caves, crevices and cliffs .................................................................. 41 4.4.2. Occurrences of rock ............................................................................................................... 41 4.4.3. Occurrences of human made structures and non-native vegetation ..................................... 41 4.4.4. Hydrological processes that sustain and interact with the rivers, streams and wetlands ...... 41 5. Matters of National Environmental Significance .............................................................................. 42 5.1. Wetlands of International Importance.................................................................................................... 42 5.2. Threatened ecological communities ...................................................................................................... 42 5.3. Threatened species ............................................................................................................................... 42 5.4. Migratory species .................................................................................................................................. 43 6. Avoid and minimise impacts .............................................................................................................. 44 6.1. Avoiding and minimising impacts on native vegetation and habitat ...................................................... 44 6.1.1. Site selection – consideration of alternative locations/routes ................................................ 44 6.1.2. Proposal components – consideration of alternative modes or technologies ....................... 44 6.1.3. Proposal planning phase – detailed design ........................................................................... 45 6.2. Avoiding and minimising prescribed biodiversity impacts ..................................................................... 47 6.2.1. Impacts of the development on the habitat of threatened species or ecological communities associated with human made structures or non-native vegetation ....................................................... 47 6.2.2. Impacts of the development on the connectivity of different areas of habitat of threatened species that facilitates the movement of those species across their range .......................................... 47 6.2.3. Impacts of the development on movement of threatened species that maintains their lifecycle ………………………………………………………………………………………………………...47 6.2.4. Impacts of the development on water quality, waterbodies and hydrological processes that sustain threatened species and threatened ecological communities .................................................... 48 6.2.5. Impacts of vehicle strikes on threatened species or on animals that are part of a TEC ........ 48 7. Impacts unable to be avoided ............................................................................................................ 49 7.1. Direct impacts .......................................................................................................................................