Mosman High School Mosman Architectus Australia Pty Ltd ABN 90 131 245 684

Prepared for: Department of Education NSW Date: 31 March 2021 Environmental Impact Statement State Significant Development Application (SSD-10465) Mosman High School Upgrade Architectus Australia Pty Ltd ABN 90 131 245 684 Adelaide Lower Ground Floor 57 Wyatt Street Adelaide SA 5000 T +61 8 8427 7300 [email protected] Brisbane Level 2, 79 Adelaide Street Brisbane QLD 4000 T +61 7 3221 6077 [email protected] Melbourne Level 25, 385 Bourke Street Melbourne VIC 3000 T +61 3 9429 5733 F + 61 3 9429 8480 [email protected] Perth QV1 Upper Plaza West 250 St Georges Terrace Perth WA 6000 T +61 8 9412 8355 [email protected] Sydney Level 18, MLC Centre 19 Martin Place Sydney NSW 2000 T +61 2 8252 8400 F +61 2 8252 8600 [email protected] architectus.com.au Report Contact Jane Fielding Senior Associate, Planning [email protected] 31 March 2021 Revision history Issue Reference Issue Date Issue Status A 24 September 2020 Draft for client review B 28 September 2020 Final C 27 October 2020 Response to DPIE comments D 24 March 2021 Alternate Tender – Test of Adequacy E 31 March 2021 Alternate Tender – Final File Ref: \\architectus.local\DFS\Projects\190400.00\Docs\C_Client\SSDA\EIS Environmental Impact Statement State Significant Development Application (SSD-10465) | Mosman High School | Architectus Contents Statement of Veracity 9 Executive Summary 10 Secretary’s Environmental Assessment Requirements 13 1. Introduction 23 1.1 Project Overview 23 1.2 Project Objectives 24 1.3 Primary Drivers of Service Need 24 1.4 Report Structure 26 1.5 Project Team 27 1.6 Estimated Capital Investment Value (CIV) 28 2. Site Analysis 29 2.1 Site Context 29 2.2 Existing Development 31 2.3 Existing facility and Community Use 32 2.4 Site Constraints 33 2.5 Heritage 33 2.6 Topography 34 2.7 Vegetation 34 2.8 Flooding 35 2.9 Bushfire 35 2.10 Services 35 2.11 Access and Car Parking 35 2.12 Public Transport 35 2.13 Active Transport 36 3. Proposed Development 37 3.1 Project Description 37 3.2 Design Principles 40 3.3 Numerical Overview 40 3.4 Construction Staging 41 3.5 Demolition 41 3.6 New Building G 42 3.7 Built Form 43 3.8 Key features of scheme 44 3.9 Building Height 45 3.10 Building Setbacks 46 3.11 External Materials and Finishes 46 3.12 Tree Removal, Tree Planting & Tree Canopy Coverage 46 3.13 Landscaping and Open Space 48 3.14 Signage 51 3.15 Carparking, Vehicular & Pedestrian Access 51 3.16 Lighting 52 3.17 Community Use of School Facilities 52 3.18 Hours of Operation 52 3.19 Employment 53 3.20 Construction Hours and Duration 53 3.21 Preliminary Construction Management Plan at Appendix AH. Analysis of Feasible Alternatives 53 3.22 Consequences of not carrying out the development 55 3.23 Related Works 55 4. Consultation 56 4.1 Council and Agency Consultation 56 4.2 Local Aboriginal Land Council 56 4.3 Government Architect NSW 57 4.4 Community Consultation 60 5. Statutory and strategic planning context 61 3 Environmental Impact Statement State Significant Development Application (SSD-10465) | Mosman High School | Architectus 5.1 Overview 61 5.2 Strategic Planning 61 5.3 Legislation 67 5.4 Environmental Planning Instruments 68 5.5 Mosman Local Environmental Plan 2012 70 5.6 Mosman Open Space and Infrastructure Development Control Plan 2012 71 5.7 Mosman Business Centres Development Control Plan (DCP) 2012 75 5.8 Mosman Contributions Plan 2018 76 6. Environmental Assessment 77 6.1 Built Form and Urban Design 77 6.2 Heritage 78 6.3 Tree Management and Amelioration 81 6.4 Play Space 83 6.5 CPTED Principles 83 6.6 Environmental Amenity 85 6.7 Transport, Traffic and Accessibility 95 6.8 Ecologically Sustainable Development (ESD) 102 6.9 Social Impacts 104 6.10 Noise and Vibration 105 6.11 Contamination 108 6.12 Salinity 109 6.13 Utilities 109 6.14 Drainage 109 6.15 Sediment, Erosion and Dust Control 110 6.16 Accessibility 110 6.17 Hazardous Building Materials 111 6.18 Geotechnical 111 6.19 Structural 112 6.20 Biodiversity 113 6.21 Waste 113 6.22 Economic Impacts 113 6.23 Cumulative Impacts 113 6.24 Site Suitability 114 6.25 Public Interest 114 7. Environmental Risk Assessment 116 8. Recommendations and Mitigation Measures 119 9. Conclusion 121 4 Environmental Impact Statement State Significant Development Application (SSD-10465) | Mosman High School | Architectus Figures & tables List of figures Figure 1 Site Context 23 Figure 2 Building Condition 26 Figure 3 Aerial View of Mosman local context 29 Figure 4 Existing Site Plan 30 Figure 5 Military Road 31 Figure 6 Military Road 31 Figure 7 Belmont Road 32 Figure 8 Gladstone Avenue 32 Figure 9 Mosman High School Building A 32 Figure 10 Mosman High School Building D 32 Figure 11 Mosman High School Building D 32 Figure 12 Mosman LEP Heritage map extract The subject site is outlined in yellow. 34 Figure 13 Heritage mapping The whole site is mapped as a local heritage item, however only Building D and Building A are heritage listed buildings. 34 Figure 14 Typical vegetation within Mosman High School 35 Figure 15 Proposed Site Plan 38 Figure 16 Render – Corner of Military Road and Belmont Road 38 Figure 17 Render – rear view 38 Figure 18 Render– Arts Plaza 39 Figure 19 Entry View (Belmont Road) 39 Figure 20 Façade Detail 40 Figure 21 Proposed Demolition 41 Figure 22 Proposed Eastern Elevation (Military Road) 42 Figure 23 Northern Elevation (Belmont Road) 42 Figure 24 Proposed Built Form 43 Figure 25 Relocation of Entry 44 Figure 26 Arts Courtyard 44 Figure 27 Play Area Courtyard 44 Figure 28 Site Strategies – Alignment 45 Figure 29 Building G Section Plan 45 Figure 30 Materials and Finishes – Layers 46 Figure 31 Tree Location Plan 47 Figure 32 Design Rationale 49 Figure 33 Landscape Masterplan 49 Figure 34 Central Lawn 50 Figure 35 Arts Courtyard 50 Figure 36 Level 4 Roof Terrace 51 Figure 37 Proposed Access Points 52 Figure 38 Mosman Junction Business Centre 76 Figure 39 Canopy encroachment Tree 22 82 Figure 40 CPTED and Surveillance 84 Figure 41 Views from Surroundings 85 Figure 42 Impact on Surrounding Properties - Harbour Bridge Views 86 Figure 43 Impact on Surrounding Properties - Ocean Views 87 Figure 44 Existing On-Street Parking Occupancy Survey Results 97 Figure 45 Construction vehicle routes 101 Figure 46 Stop Line Relocation 101 Figure 47 Work Zone 102 Figure 48 Noise survey locations and boundary of the site. 105 Figure 49 Circulation and Access (noting DDA compliant access) 111 List of tables Table 1 Secretary’s Environmental Assessment Requirements 13 Table 2 Project team 27 Table 3 Numerical overview 40 Table 4 Proposed tree removal, retention & additional trees 47 Table 5 Tree canopy coverage 47 Table 6 Play Space Provision 51 Table 7 Options Analysis 54 Mosman High School | Environmental Impact Statement State Significant Development Application (SSD-10465) | Architectus Table 8 Transport for NSW consultation 56 Table 9 Consultation with GANSW 57 Table 10 Consistency with relevant strategic plans, policies and guidelines 61 Table 11 Legislation 67 Table 12 Environmental planning instruments 68 Table 13 Mosman Local Environmental Plan 2012 70 Table 14 Consistency with Mosman DCP 2012 71 Table 15 Summary of Heritage Impacts 79 Table 16 Summary of Tree Retention Value and Proposed Action (Retain/Remove) 81 Table 17 CPTED Principles 83 Table 18 Travel mode – students travelling to school on typical morning 96 Table 19 Travel mode – staff travelling to/from school 96 Table 20 SIDRA Results for existing scenario 97 Table 21 Trip Generation Summary – Students and Staff 98 Table 22 Poisson Distribution Queuing Analysis – Future 98 Table 23 Social Impact of proposed development 104 Table 24 Environmental Risk Assessment 116 Table 25 Mitigation Measures 119 6 Environmental Impact Statement State Significant Development Application (SSD-10465) | Mosman High School | Architectus Appendices List of appendices A Secretary’s Environmental Assessment Requirements Issued by the Department of Planning, Industry and Environment, 18 June 2020 (SSD-10465) B Detailed Site Survey Prepared by LTS C Section 10.7(2) (5) Planning Certificate Issued by Mosman Municipal Council D Drawings Approval List Prepared by Architectus E Vertical Transportation Services Prepared by JHA Services F Architectural Plans Prepared by Woods Bagot G Architectural Design Statement Prepared by Woods Bagot H Landscape Plans Prepared by Black Beetle I Landscape Concept Report Prepared by Black Beetle J Heritage Impact Statement Prepared by Purcell K Aboriginal Cultural Heritage Report Prepared by Austral Archaeology L Aboriginal Archaeological Report Prepared by Austral Archaeology M Historical Archaeological Assessment and Archaeological Research Design Prepared by Austral Archaeology N Consultation Report Prepared by SI O Social Impact Assessment Prepared by RPS P Traffic Impact Assessment Prepared by PTC Consultants Q Green Travel Plan Prepared by PTC Consultants R Geotechnical Investigation Report Prepared by Coffey S Site Contamination Assessment Prepared by Coffey 7 Environmental Impact Statement State Significant Development Application (SSD-10465) | Mosman High School | Architectus T Salinity Assessment Report Prepared by Coffey U Remedial Action Plan Prepared by Coffey V Limited Asbestos and Hazardous Materials Report Prepared by Coffey W Integrated Water Management Plan Prepared by JHA Services X Infrastructure Management Plan Prepared by JHA Services Y Accessibility Design Review Report Prepared by McKenzie Group Consulting Z Civil Plans Prepared by Taylor Thomson Whitting AA

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