INFRASTRUCTURE REPORT PROJECT ABC 194, 360 Dominion Road, Mt Eden
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INFRASTRUCTURE REPORT PROJECT ABC 194, 360 Dominion Road, Mt Eden Issue: F 29 April 2021 Prepared For: Foodstuffs North Island Ltd Project No.: N026 3 Document No.: N026 3-RBG -ZZ -RP -CV -001 P:\N0263T - Project ABC 194\5_Working\Reports\N0263-RBG-ZZ-RP-CV-RP001 INFRASTRUCTURE REPORT\290426 - Rev F Report Issues\N0263-RBG-ZZ-RP-CV-01-F_INFRASTRUCTURE REPORT.docx NZ_Auckland RPT Template[V2-062020] INFRASTRUCTURE REPORT PROJECT ABC 194,360 Dominion Road, Mt Eden Project No. N0263 Issue: F 29 April 2021 Report Amendment Register Issue Amended Issue / Amendment Details Author(s) Reviewer Date Ref Section(s) A - Draft, for comment Duncan Thomson Ross Lucas 12/02/21 B All 2nd Draft Duncan Thomson Ross Lucas 19/02/21 C 4, 5 For Resource Consent Duncan Thomson Ross Lucas 04/03/21 D 5.2, 5.3 For Resource Consent Duncan Thomson Ross Lucas 09/03/21 E 5.1 For Resource Consent Duncan Thomson Ross Lucas 26/03/21 F 3.3 For Resource Consent Duncan Thomson Ross Lucas 29/04/21 Page i INFRASTRUCTURE REPORT PROJECT ABC 194,360 Dominion Road, Mt Eden Project No. N0263 Issue: F 29 April 2021 Executive Summary This report outlines the proposed development and identifies specific civil engineering requirements necessary to ensure the development can adequately be serviced. In general, the following can be stated about the proposed development: • Bulk earthwork volumes are estimated at cut of 7,000 m3 and 240m3 of fill over an area of 1.0 ha and are required for levelling the site, and excavation for below ground storage tanks. There will be some additional excavation volumes associated with piling and trenching for the realignment and replacement of the public sewer. Formation depths ranging from shallow levelling cuts to excavation for below ground storage tanks and culvert. It is expected that some rock breaking shall be necessary for excavation in zones of fractured rock, primarily identified along the eastern boundary, with a hydraulic breaker. Site preparation will include demolition of existing structures and pavements. No topsoil exists on site, as such no top-soil strip is necessary. • The water pressure outside the site has sufficient fire hydrant flow capacity in the surrounding area and has been confirmed to satisfy the NZ Fire Service Fire Fighting Water Supplies Code of Practice requirements for a FW2 Water Supply Classification. • The Development and all commercial units within the development will have their own metered water supply and fire service connection(s) with back flow prevention devices. • The wastewater discharge from the proposed development will be serviced by a network extension to the public reticulation system located close to the site, requiring a new public pipe to an alternative network nominated by Watercare with capacity. • Existing stormwater discharges from the site are predominantly to soakage boreholes. The development stormwater strategy is to discharge to new soakage boreholes located in available zones, augmented with onsite stormwater detention, to achieve the required discharge capacity. • The existing stormwater Over Land Flow Path (OLFP) that currently flows through the site will be managed in the proposed development, via conveyance and storage measures, to achieve adequate flood protection for the development and also to improve, or mitigate, adverse impacts to flood levels in neighbouring properties. • Power and telecommunication supply for the development can be connected from the existing supply and relocated vector power transformer. All services reticulation design will be in accordance with the New Zealand Building Code and the network supplier’s requirements. Page ii INFRASTRUCTURE REPORT PROJECT ABC 194,360 Dominion Road, Mt Eden Project No. N0263 Issue: F 29 April 2021 Table of Contents 1 INTRODUCTION .................................................................................................................................. 1 1.1 Document Scope ........................................................................................................................ 1 1.2 Project Description ..................................................................................................................... 1 1.3 Available Documents ................................................................................................................. 2 2 EXISTING SITE .................................................................................................................................... 3 2.1 Site Location ............................................................................................................................... 3 2.2 Description ................................................................................................................................. 3 3 SITE SERVICING ................................................................................................................................. 5 3.1 Water Supply .............................................................................................................................. 5 3.2 Wastewater ................................................................................................................................ 6 3.3 Stormwater ................................................................................................................................. 9 3.4 Utility Services .......................................................................................................................... 13 4 OVERLAND FLOW PATH AND FLOOD PLAIN ................................................................................ 14 4.1 Existing Overland Flow Paths and Flooding ............................................................................ 14 4.2 Proposed Scenario ................................................................................................................... 15 5 EARTHWORKS MANAGEMENT ....................................................................................................... 17 5.1 Bulk Earthworks ....................................................................................................................... 17 5.2 Erosion and Sediment Control ................................................................................................. 18 5.3 Works Management ................................................................................................................. 19 6 ROADING AND ACCESSWAY .......................................................................................................... 20 7 SITE SUITABILITY FOR DEVELOPMENT ........................................................................................ 20 APPENDICES Appendix A Site Information Appendix B Topographical Survey Appendix C Preliminary Civil Engineering Drawings Appendix D Site Servicing Calculations Appendix E Watercare Correspondence This report has been prepared on behalf of and for the exclusive use of the Client, and is subject to and issued in accordance with the agreement between the Client and Robert Bird Group (New Zealand) Limited. Robert Bird Group (New Zealand) Limited accepts no liability or responsibility whatsoever for any use of or reliance upon this report by any third party. Any copying of this report to external parties requires the permission of the Client and Robert Bird Group (New Zealand) Limited. Page iii INFRASTRUCTURE REPORT PROJECT ABC 194,360 Dominion Road, Mt Eden Project No. N0263 Issue: F 29 April 2021 1 INTRODUCTION 1.1 Document Scope Robert Bird Group (RBG) has been engaged by Foodstuffs North Island Limited to prepare the following Infrastructure Report in support of the Resource Consent application for both land use activities and subdivision of the proposed development at 360 Dominion Road, Mt Eden as detailed in the attached plans. This infrastructure report is an assessment of the potential serviceability and development for the property, particularly with respect to the following: • Water supply • Wastewater • Stormwater • Overland Flow Paths • Bulk Earthworks • Roading and Accessways A preliminary layout design for the proposed private and public infrastructure is provided in the plans attached to this report. 1.2 Project Description The proposed six-level mixed-use development consists of ground floor car-parking, retail, commercial and residential units fronting the side roads, a 1st floor supermarket and residential parking with multi-storey residential apartments above. The 14 existing retail units along the frontage of Dominion Road held in separate unit title ownership are to be worked around as contemplated by the easement of support registered on both titles (Lot 1 adjacent Shops and Lot 2 subject development). Figure 1.1: Proposed development architectural render Source: Warren & Mahoney Page 1 INFRASTRUCTURE REPORT PROJECT ABC 194,360 Dominion Road, Mt Eden Project No. N0263 Issue: F 29 April 2021 The key elements of the development are as follows: • 2,850sq.m supermarket (retail floor 1,700sq.m) • 122residential units • 188 commercial car-parking • 89 residential parking 1.3 Available Documents The project team have provided the following documentation to support the application and should be referred to in conjunction with this report: • Architectural Concept report – Warren and Mahoney dated February 2021 • Geotechnical Investigation and Assessments – Tonkin & Taylor dated October 2020. • Ground Contamination Report – Tonkin & Taylor dated February 2021 • Flood Assessment Report – EWaters NZ Ltd