Appendix 2: Addendum Flora and Fauna Impact Assessment Including Offset Plan
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STATE WATER CORPORATION CHAFFEY DAM AUGMENTATION AND SAFETY UPGRADE PREFERRED INFRASTRUCTURE REPORT Appendix 2: Addendum Flora and Fauna Impact Assessment including Offset Plan Appendices 301015-02980 : 301015-02980-REP-0014 Rev 0 : 15 March 2013 STATE WATER CORPORATION CHAFFEY DAM AUGMENTATION AND SAFETY UPGRADE PREFERRED INFRASTRUCTURE REPORT This page has been left blank intentionally Appendices 301015-02980 : 301015-02980-REP-0014 Rev 0 : 15 March 2013 Addendum Report TERRESTRIAL AND AQUATIC FLORA AND FAUNA IMPACT ASSESSMENT ADDENDUM REPORT CHAFFEY DAM AUGMENTATION AND SAFETY UPGRADE MARCH 2013 unit 18, level 3, 21 mary st surry hills nsw 2010 australia t 61 2 8202 8333 www.nghenvironmental.com.au e [email protected] unit 17, 27 yallourn st (po box 1037) suite 1, 216 carp st (po box 470) suite 1, 39 fitzmaurice st (po box 5464) fyshwick act 2609 australia bega nsw 2550 australia wagga wagga nsw 2650 australia t 61 2 6280 5053 f 61 2 6280 9387 t 61 2 6492 8333 t 61 2 6971 9696 f 61 2 6971 9693 suite 7, 5/18 griffin dr (po box 1037) dunsborough wa 6281 australia t 61 8 9759 1985 Document Verification Project Title: Terrestrial and Aquatic Flora and Fauna Impact Assessment Addendum Report. Chaffey Dam Augmentation and Safety Upgrade Project Number: 2400 Project File Name: Addendum Report Final Revision Date Prepared by (name) Reviewed by (name) Approved by (name) Draft 28/02/13 Freya Gordon Jacqui Coughlan Jacqui Coughlan Final Dave Maynard Final V1.0 13/03/13 Freya Gordon Jacqui Coughlan Nick Graham‐Higgs Dave Maynard Final 14/03/13 Freya Gordon Natascha Arens Dave Maynard nghenvironmental prints all documents on environmentally sustainable paper including paper made from bagasse (a by‐ product of sugar production) or recycled paper. nghenvironmental is a registered trading name of NGH Environmental Pty Ltd; ACN: 124 444 622. ABN: 31 124 444 622 unit 18, level 3, 21 mary st surry hills nsw 2010 australia t 61 2 8202 8333 www.nghenvironmental.com.au e [email protected] unit 17, 27 yallourn st (po box 1037) suite 1, 216 carp st (po box 470) suite 1, 39 fitzmaurice st (po box 5464) fyshwick act 2609 australia bega nsw 2550 australia wagga wagga nsw 2650 australia t 61 2 6280 5053 f 61 2 6280 9387 t 61 2 6492 8333 t 61 2 6971 9696 f 61 2 6971 9693 suite 7, 5/18 griffin dr (po box 1037) dunsborough wa 6281 australia t 61 8 9759 1985 Terrestrial and Aquatic Flora and Fauna Impact Assessment Addendum Report Chaffey Dam Augmentation and Safety Upgrade CONTENTS 1 INTRODUCTION .......................................................................................................................... 4 1.1 BACKGROUND ......................................................................................................................................4 1.1.1 History of the Project ............................................................................................................................. 4 1.1.2 Project Location and Layout .................................................................................................................. 5 1.2 STUDY SITE AND STUDY AREA DESCRIPTION .......................................................................................5 1.3 SCOPE OF THIS REPORT ........................................................................................................................6 1.4 ASSESSMENT OF ALTERNATIVES ..........................................................................................................9 2 SUBJECT SPECIES ....................................................................................................................... 12 2.1 BOOROOLONG FROG .........................................................................................................................12 2.1.1 Conservation Status ............................................................................................................................. 12 2.1.2 Degree of Protection in Reserves ........................................................................................................ 13 2.1.3 Revised impact assessment ................................................................................................................. 14 2.1.4 Current Surveys ................................................................................................................................... 14 2.1.5 Methods ............................................................................................................................................... 15 2.1.6 Results.................................................................................................................................................. 15 2.1.7 Current Population Status ................................................................................................................... 16 2.1.8 Habitat ................................................................................................................................................. 19 2.1.9 Potential Impacts ................................................................................................................................. 20 2.1.10 Management measures for Booroolong Frog ..................................................................................... 21 2.1.11 Expected or Predicted Effectiveness of proposed mitigation .............................................................. 22 2.2 QUEENSLAND BLUEGRASS .................................................................................................................22 2.2.1 Survey Methods ................................................................................................................................... 23 2.2.2 Results.................................................................................................................................................. 25 2.2.3 Potential impacts and mitigation ......................................................................................................... 25 2.3 BORDER THICK‐TAILED GECKO ...........................................................................................................25 2.3.1 Habitat and Population at Chaffey Dam .............................................................................................. 26 2.3.2 Potential Impacts ................................................................................................................................. 26 2.3.3 Mitigation and management measures for the Border Thick‐tailed Gecko ........................................ 27 2.3.4 Expected or Predicted Effectiveness of proposed mitigation .............................................................. 28 2.4 THREATENED FLORA SPECIES AND VEGETATION COMMUNITIES .....................................................28 2.4.1 EPBC listed White Box‐Yellow Box‐Blakely's Red Gum Grassy Woodland and Derived Native Grassland ........................................................................................................................................ 28 2.4.2 TSC listed White Box‐Yellow Box‐Blakely's Red Gum Woodland ......................................................... 29 2400 Final 1 Terrestrial and Aquatic Flora and Fauna Impact Assessment Addendum Report Chaffey Dam Augmentation and Safety Upgrade 2.4.3 Small Snake Orchid and Euphrasia arguta ........................................................................................... 31 2.4.4 Justification for not targeting Eucalyptus rubida subsp. barbigerorum, Thesium australe and Bothriochloa biloba as part of this assessment. ............................................................................ 31 2.5 OTHER THREATENED FAUNA SPECIES ................................................................................................32 2.5.1 Murray Cod .......................................................................................................................................... 32 2.6 THREATENED SPECIES HABITAT AVAILABILITY ...................................................................................33 2.6.1 Historical threatened species data ...................................................................................................... 33 3 REVISED IMPACT ASSESSMENT ................................................................................................. 35 3.1 SUMMARY OF POSITIVE CHANGE IN OVERALL IMPACT ....................................................................35 3.2 SUMMARY OF POTENTIAL IMPACTS ON THREATENED SPECIES ........................................................35 4 MITIGATION AND MANAGEMENT MEASURES ........................................................................... 37 5 CONCLUSION ............................................................................................................................ 37 6 REFERENCES .............................................................................................................................. 39 APPENDIX A REVISED THREATENED SPECIES IMPACT ASSESSMENT ..............................................A‐I APPENDIX B RESPONSE TO SUBMISSIONS .................................................................................... B‐I APPENDIX C OFFSET PLAN ........................................................................................................... C‐I TABLES Table 1‐1. Comparison of area of vegetation to be inundated under alternative scenarios of storage capacity .........................................................................................................................................................11