Armadale Road to North Lake Road Bridge EPA Referral Supporting Document Prepared for Main Roads Western Australia by Strategen August 2018 Armadale Road to North Lake Road Bridge EPA Referral Supporting Document Strategen is a trading name of Strategen Environmental Consultants Pty Ltd Level 1, 50 Subiaco Square Road Subiaco WA 6008 ACN: 056 190 419 August 2018 Limitations Scope of services This report (“the report”) has been prepared by Strategen Environmental Consultants Pty Ltd (Strategen) in accordance with the scope of services set out in the contract, or as otherwise agreed, between the Client and Strategen. In some circumstances, a range of factors such as time, budget, access and/or site disturbance constraints may have limited the scope of services. This report is strictly limited to the matters stated in it and is not to be read as extending, by implication, to any other matter in connection with the matters addressed in it. Reliance on data In preparing the report, Strategen has relied upon data and other information provided by the Client and other individuals and organisations, most of which are referred to in the report (“the data”). Except as otherwise expressly stated in the report, Strategen has not verified the accuracy or completeness of the data. To the extent that the statements, opinions, facts, information, conclusions and/or recommendations in the report (“conclusions”) are based in whole or part on the data, those conclusions are contingent upon the accuracy and completeness of the data. Strategen has also not attempted to determine whether any material matter has been omitted from the data. Strategen will not be liable in relation to incorrect conclusions should any data, information or condition be incorrect or have been concealed, withheld, misrepresented or otherwise not fully disclosed to Strategen. The making of any assumption does not imply that Strategen has made any enquiry to verify the correctness of that assumption. The report is based on conditions encountered and information received at the time of preparation of this report or the time that site investigations were carried out. Strategen disclaims responsibility for any changes that may have occurred after this time. This report and any legal issues arising from it are governed by and construed in accordance with the law of Western Australia as at the date of this report. Environmental conclusions Within the limitations imposed by the scope of services, the preparation of this report has been undertaken and performed in a professional manner, in accordance with generally accepted environmental consulting practices. No other warranty, whether express or implied, is made. Client: Main Roads Western Australia Revision Strategen Submitted to Client Report Version Purpose No. author/reviewer Form Date Draft Report A Client review C Turner/ H Morgan, T Word 17/07/2018 Bowra Revised Draft Report B Client review H Morgan, T Bowra Word 26/07/2018 Final Draft Report C Client approval H Morgan Word 20/08/2018 Final Report 0 For submission to H Morgan PDF 22/08/2018 EPA Filename: MRO18220.01 R001 Rev 0 - 22 August 2018 Table of Contents Table of contents 1. Introduction 6 1.1 Purpose and scope 6 1.2 Proponent 6 1.3 Environmental impact assessment process 8 1.4 Other approvals and regulation 8 2. Proposal 9 2.1 Background and justification 9 2.2 Description of Proposal 9 2.2.1 Key Proposal Characteristics 9 2.2.2 Proposal design 9 2.2.3 Proposal construction 11 2.3 Local and regional context 11 3. Stakeholder engagement 14 3.1 Key stakeholders 14 3.2 Stakeholder engagement process 14 3.3 Stakeholder consultation 14 4. Environmental principles and factors 19 4.1 Principles 19 4.2 Key environmental factor 1 – flora and vegetation 20 4.2.1 EPA objectives 20 4.2.2 EPA policy and guidelines 20 4.2.3 Receiving environment 20 4.2.4 Potential impacts 25 4.2.5 Assessment of impacts 26 4.2.6 Mitigation 26 4.2.7 Predicted outcome 27 4.3 Key environmental factor 2 – Terrestrial Environmental Quality 27 4.3.1 EPA objective 27 4.3.2 EPA policy and guidelines 27 4.3.3 Receiving environment 27 4.3.4 Potential impacts 29 4.3.5 Assessment of impacts 29 4.3.6 Mitigation 30 4.3.7 Predicted outcome 30 4.4 Key environmental factor 3 – Terrestrial Fauna 30 4.4.1 EPA objective 30 4.4.2 EPA policy and guidelines 30 4.4.3 Receiving environment 30 4.4.4 Potential impacts 37 4.4.5 Assessment of impacts 37 4.4.6 Mitigation 38 4.4.7 Predicted outcome 38 4.5 Key environmental factor 4 – Inland Waters 38 4.5.1 EPA objective 38 4.5.2 EPA policy and guidelines 38 4.5.3 Receiving environment 38 4.5.4 Potential impacts 42 4.5.5 Assessment of impacts 42 4.5.6 Mitigation 42 4.5.7 Predicted outcome 43 4.6 Key environmental factor 5 – Social Surroundings 43 4.6.1 EPA objective 43 4.6.2 EPA policy and guidelines 43 4.6.3 Receiving environment 43 4.6.4 Potential impacts 44 4.6.5 Assessment of impacts 47 4.6.6 Mitigation 52 4.6.7 Predicted outcome 53 5. Other environmental factors or matters 54 MRO18220.01 R001 Rev 0 22-Aug-18 Table of Contents 6. References 55 List of tables Table 1: Proponent and key contact details 6 Table 2: Other approvals and regulation 8 Table 3: Proposal summary table 9 Table 4: Justification of avoiding, minimising, mitigating and managing clearing impacts 10 Table 5: Summary of Stakeholder consultation 15 Table 5: EP Act principles 19 Table 6: Extent of Bassendean Complex central and south 20 Table 7: Vegetation Types surveyed in Development Envelope 21 Table 8: Vegetation condition surveyed in Development Envelope 22 Table 9: Conservation significant species Likely to occur 31 Table 10: Fauna habitats types within the DE 31 Table 11: Black cockatoo foraging / roosting habitat quality 35 Table 12: Geomorphic wetlands within DE 39 Table 13: Noise level objective limits 47 Table 14: Noise assessment summary – number of properties subject to exceedance of SPP 5.4 criteria 48 Table 15: Assessment of other environmental factors 54 List of figures Figure 1: Proposal Development Envelope 7 Figure 2: Regional context 13 Figure 3: Vegetation types, ecological communities and conservation flora 23 Figure 4: Vegetation condition 24 Figure 5: Acid sulfate soils 28 Figure 6: Fauna habitat 33 Figure 7: Black cockatoo habitat 34 Figure 8: Black Cockatoo habitat – regional context 36 Figure 9: Geomorphic wetlands 40 Figure 10: Priority Drinking Water Source Areas and Wellhead Protection Zone 41 Figure 11: Aboriginal and European heritage 45 Figure 12: Topography 46 Figure 13: Visual cross-section C near Solomon Road (Option A only – Option B duck and dive) 49 Figure 14: Visual cross-section B midway between Solomon Road and Tapper Road (Option A only – Option B at grade) 50 Figure 15: Visual cross section C near Tapper Road (Options A and B) 50 List of appendices All appendices are submitted in electronic form. Appendix 1 List of Properties within Development Envelope Appendix 2 Concept Design Drawings Appendix 3 Communications and Stakeholder Engagement Strategy / Tracker Appendix 4: Project Environmental Management Plan Appendix 5 Detailed Flora and Vegetation Survey Appendix 6 Acid Sulfate Soil Investigation Report Appendix 7 Level 1 Fauna and Black Cockatoo Survey Appendix 8 Addendum Black Cockatoo Assessment Appendix 9 Noise Assessment Report MRO18220.01 R001 Rev 0 22-Aug-18 Armadale Road to North Lake Road Bridge Executive Summary Main Roads Western Australia (Main Roads) are proposing to upgrade sections of Armadale Road and the Kwinana Freeway in the City of Cockburn (the Proposal). The Proposal is to realign and extend Armadale Road from Solomon Road to North Lake Road; duplicate and upgrade intersections along Armadale Road between Solomon Road and Ghostgum Avenue; construct a southbound collector distributor road along the Kwinana Freeway between Berrigan Drive and Armadale Road; and construct a new bridge and on/off ramps over Kwinana Freeway. Main Roads are pursuing two design options for the intersections at Verde Drive/Tapper Road and Solomon Road, as outlined below. Option A Option A comprises a four-lane dual carriageway passing over roundabouts at the intersections of Armadale Road and: • Verde Drive/Tapper Road • Solomon Road. Option B Option B comprises a four-lane dual carriageway passing over a roundabout at the intersection of Armadale Road and Tapper Road/Verde Drive, and passing under a roundabout at the intersection of Armadale Road/Solomon Road. The trench structure will be above the groundwater table and not require permanent groundwater drainage or dewatering. Table ES1 provides a summary of the Proposal. Table ES2 provides a description of the location and proposed extent of physical and operational elements of the existing project and the Proposal. Table ES3 provides a summary of potential impacts, proposed mitigation and outcomes for the Proposal. Table ES1: Proposal summary table Proposal title Armadale Road to North Lake Road Bridge Proponent name Main Roads Short description The Proposal is to realign and extend Armadale Road from Solomon Road to North Lake Road; duplicate and upgrade intersections along Armadale Road between Solomon Road and Ghostgum Avenue; construct a new bridge and on/off ramps over Kwinana Freeway; and construct a southbound collector distributor road along the Kwinana Freeway between Berrigan Drive and Armadale Road. Table ES2: physical and operational elements Element Location Proposed extent Physical elements Bridge, roads and associated See Figure 1 Clearing of no more than 5.7 ha of native vegetation within infrastructure a disturbance envelope of 48.6 ha.