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Flora and Vegetation Survey.PDF Strike Limited Flora and Vegetation Survey Ocean Hill 3D Seismic Survey 27 April 2021 JBS&G59367- 136,162 (Rev 0) JBS&G Australia Pty Ltd T/A Strategen-JBS&G Table of Contents 1. Introduction ................................................................................................................... 1 1.1 Scope ................................................................................................................... 1 2. Context .......................................................................................................................... 3 2.1 Legislative Context .............................................................................................. 3 2.1.1 Environmental Protection and Biodiversity Conservation Act 1999 .... 3 2.1.2 Biodiversity Conservation Act 2016...................................................... 3 2.1.3 Environmental Protection Act 1986 ..................................................... 3 2.1.4 Biosecurity and Agriculture Management Act 2007 ............................ 3 3. Environmental Setting ................................................................................................... 5 3.1 Climate ................................................................................................................. 5 3.2 Soils and Landforms ............................................................................................ 5 3.2.1 Hydrology ............................................................................................. 8 3.2.2 Environmentally Sensitive Areas .......................................................... 8 3.2.3 Conservation Areas .............................................................................. 8 3.2.4 Land Use ............................................................................................... 8 3.2.5 Regional Vegetation ............................................................................. 8 4. Methods ....................................................................................................................... 10 4.1 Rationale for Survey Approach .......................................................................... 10 4.2 Desktop assessment .......................................................................................... 10 4.2.1 Field assessment ................................................................................ 10 4.3 Survey limitations and constraints .................................................................... 12 5. Results .......................................................................................................................... 14 5.1 Desktop assessment .......................................................................................... 14 5.1.1 Threatened and Priority Flora ............................................................ 14 5.1.2 Threatened and Priority Ecological Communities.............................. 15 5.2 Field Survey ....................................................................................................... 18 5.2.1 Native Flora ........................................................................................ 18 5.2.2 Introduced (exotic) Taxa .................................................................... 18 5.2.3 Vegetation .......................................................................................... 18 5.2.4 Vegetation condition ......................................................................... 19 5.2.5 Conservation significant communities ............................................... 19 5.2.6 Conservation significant flora ............................................................ 22 6. Discussion .................................................................................................................... 24 7. Limitations ................................................................................................................... 25 ©JBS&G Australia Pty Ltd T/A Strategen-JBS&G | JBS&G59367- 136,162 (Rev 0) ii 8. References ................................................................................................................... 26 List of Tables Table 3.1: DAFWA Soil landscape subsystems (Source DPIRD 2018) ...................................... 6 Table 4.1: Database searches conducted for the desktop assessment. ................................ 10 Table 4.2: Survey Plan. ........................................................................................................... 10 Table 4.3: Survey Personnel. .................................................................................................. 10 Table 4.4: Vegetation condition scale for South West and Interzone Botanical Provinces (EPA 2016). ...................................................................................................... 12 Table 4.5: Flora and vegetation survey potential limitations and constraints ...................... 13 Table 5.1: Vegetation units within the Survey Area .............................................................. 18 Table 5.2: Vegetation Condition within the Survey Area ...................................................... 19 Table 5.3: Conservation significant flora identified during 2016 and 2020 surveys.............. 22 List of Figures Figure 1.1: Survey Area ............................................................................................................ 2 Figure 3.2: Soil landscape subsystems ..................................................................................... 7 Figure 5.1: Vegetation Types in the Survey Area ................................................................... 20 Figure 5.2: Vegetation condition ........................................................................................... 21 Figure 5.3: Conservation Significant Flora Recorded within the Survey Area ....................... 23 Appendices Appendix A Conservation significant flora and ecological community definition Appendix B Desktop assessment results Appendix C Conservation significant flora species potentially occurring within Survey Area. Appendix D Native vascular plant taxa recorded within the survey area Appendix E Location of Priority Listed Flora species recorded during reconnaissance and targeted surveys. ©JBS&G Australia Pty Ltd T/A Strategen-JBS&G | JBS&G59367- 136,162 (Rev 0) iii 1. Introduction Strike West Pty Ltd (Strike) is proposing to undertake a 3D seismic acquisition survey in the Shire Carnamah in the mid-west region of Western Australia within the petroleum exploration permit EP 495 (the Project) (Figure 1.1). The Project is proposed to be undertaken within an area of approximately 276.1 km2 (maximum 32.3 km in length by 8.9 km in width) within the Perth Basin (the Project Area). The northern extent is approximately 8 km east of Eneabba the Project Area is approximately 75 - 100 km southeast of Dongara, extending along Carnamah-Eneabba Road (north) and Coorow-Green Head Road (south) (Project Area). The Project will largely be undertaken in rural areas previously cleared for farming activities. The seismic lines have been aligned to use previously cleared areas where possible to undertake the Project with the minimum amount of clearing and disturbance via mulching of native vegetation. The Project will however require temporary disturbance of native vegetation via mulching to enable access for the vibroseis trucks and light vehicles. A maximum vegetation clearing width of 3.5m will be maintained for the seismic lines. The clearing of significant trees i.e. with a truck diameter greater than 100 mm will not occur. An Ecological Survey was therefore necessary to determine the environmental values within the areas of native vegetation within which temporary disturbance will be required. Areas requiring clearing of native vegetation formed the Survey Area for the purpose of this Ecological Survey (Figure 1.1). In total, the Survey Area comprises an area of approximately 4,600 ha, containing approximately 140 km of source lines that require clearing that intersect with native vegetation. The Survey Area contains approximately 4,200 ha of remnant vegetation. 1.1 Scope The scope of the Ecological Survey was to undertake a desktop assessment and field assessment within the Survey Area. The objectives of the Ecological Survey included: • Undertake desktop assessments for flora and vegetation within, and adjacent to, the Project Area; • Undertake a flora and vegetation survey of areas of native vegetation within, and adjacent to, areas that may be impacted by clearing; and This Ecological Survey report provides the results of the desktop assessments and the in-field flora and vegetation, and fauna surveys. The assessment has been undertaken to support Strike with the required environmental approvals for the Project, including informing management and mitigation measures implemented in response to the potential interaction between the proposed works and the flora and vegetation values identified. This assessment builds on the Flora and Vegetation survey undertaken by ecologia in 2016 across a portion of the current Project Area. Data and results where relevant to this assessment from ecologia (2016) report have been consolidated and presented in this report. ©JBS&G Australia Pty Ltd T/A Strategen-JBS&G | JBS&G59367- 136,162 (Rev 0) 1 D R E OVERVIEWTHREE MAPV SPRINGS! D R S R E ING S SPR E E D R RE CARNAMAH‐ENEABBA R ‐TH BA B ! EA EN ILLAWONG ENEABBA ! EN E ! A B B COOLIMBA A ! D R LEEMAN
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