Notice of Requirement. Northern Interceptor
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Appendix A Assessment of Alternatives Appendix G Private Properties directly affected by the Designation Assessment of Alternatives Northern Interceptor Wastewater Project 2016 WINNER SUSTAINABILITY REPORTING AWARDS Northern Interceptor: Assessment of Alternatives This document has been prepared for the benefit of Watercare Services Limited. No liability is accepted by this company or any employee or sub-consultant of this company with respect to its use by any other person. This disclaimer shall apply notwithstanding that the report may be made available to Auckland Council and other persons for an application for permission or approval to fulfil a legal requirement. QUALITY STATEMENT PROJECT MANAGER PROJECT TECHNICAL LEAD Chris van der Boom Chris Povey PREPARED BY Chris Povey, Megan Couture, Jay Burgess … ……………………………............... 17/06/2016 CHECKED BY Garrett Hall ………………………………............... 17/06/2016 REVIEWED BY Chris Scrafton, Jim Bradley (part of) ………………………………............... 17/06/2016 APPROVED FOR ISSUE BY Chris van der Boom …… …………………………............... 17/06/2016 AUCKLAND MWH House Level 3, 111 Carlton Gore Road, Newmarket, Auckland 1023 PO Box 9176, Newmarket, Auckland 1149 TEL +64 9 580 4500, FAX +64 9 580 7600 REVISION SCHEDULE Signature or Typed Name (documentation on file). Rev Date Description No Prepared by Checked by Reviewed by Approved by 1 Feb 19 Draft for Client review CP, MC, GH CS, JB CvdB 2016 JB 2 April 19 Final Draft CP, MC, GH CS, JB CvdB 2016 JB 3 Oct 5 Final MC CS CS CvdB 2016 Status: Final Draft Project No.: 80502292 April 2016 Northern Interceptor: Assessment of Alternatives Watercare Services Limited Northern Interceptor - Assessment of Alternatives CONTENTS 1 Introduction and Project Background.................................................................................................. 1 1.1 Issues ............................................................................................................................................ 2 1.2 Watercare’s Strategic Intent .......................................................................................................... 4 1.3 Project Objectives and Watercare’s Strategic Intent ..................................................................... 4 2 Consideration of Alternatives .............................................................................................................. 5 2.1 Background .................................................................................................................................... 5 2.1.1 Three Waters Strategic Planning Programme (2008) ............................................................. 5 2.1.2 Three Waters Strategy Review ............................................................................................... 8 2.1.2.1 Option Identification ........................................................................................................ 9 2.1.2.2 Option 1 – Do Nothing ..................................................................................................... 9 2.1.2.3 Option 2 – Mangere WWTP ............................................................................................ 9 2.1.2.4 Option 3 – Rosedale and Mangere WWTPs ................................................................... 9 2.1.2.5 Option 4 – Rosedale WWTP ......................................................................................... 10 2.1.2.6 Option 5 – North Western Regional WWTP .................................................................. 10 2.1.2.7 Analysis of Options ....................................................................................................... 10 2.1.2.8 The Preferred Option .................................................................................................... 13 3 Consideration of Alternatives ............................................................................................................ 14 3.1 Ability to Stage the Project .......................................................................................................... 14 3.2 The High Level Corridor ............................................................................................................... 15 3.3 Broad Concepts ........................................................................................................................... 17 4 Northern Corridor Development: Hobsonville to Rosedale ............................................................... 18 4.1 Development of Longlist Options ................................................................................................. 19 4.1.1 Option 1 – Upper Harbour Drive ........................................................................................... 21 4.1.2 Option 2 – Beach Haven Road ............................................................................................. 22 4.1.3 Option 3 – Upper Harbour Highway ...................................................................................... 23 4.1.4 Option 4 – Kyle Road ............................................................................................................ 24 4.1.5 Option 5 – Lucas Creek – Rising Main and Gravity Sewer ................................................... 25 4.1.6 Option 6 – Lucas Creek – Rising Main only .......................................................................... 26 4.1.7 Option 7 – Deep Tunnel – Western Alignment ...................................................................... 27 4.1.8 Option 8 – Deep Tunnel – Eastern Alignment....................................................................... 28 4.1.9 Option 9 – Tauhinu Road ...................................................................................................... 29 4.1.10 Option 10 – Beach Haven Road – Coastal and Deep Tunnel Option ................................... 30 4.1.11 Option 11 – Shallow Tunnel – Eastern Alignment................................................................. 31 4.2 Qualitative Risk Analysis ............................................................................................................. 32 4.3 Multi-Criteria Analysis .................................................................................................................. 34 Status: Draft April 2016 Northern Interceptor: Assessment of Alternatives 4.4 Identification of Shortlist Options ................................................................................................. 38 4.4.1 Shortlist Options ................................................................................................................... 40 4.4.1.1 Initial Shortlist Option Assessment and ECI Input ......................................................... 40 4.5 Comparative Costs ...................................................................................................................... 46 4.6 Initial Screening Process ............................................................................................................. 46 4.7 Preferred Option Selection .......................................................................................................... 47 4.8 Final Shortlist Development ......................................................................................................... 50 4.8.1 Preferred Option ................................................................................................................... 50 5 Southern Corridor Development: Concourse to Hobsonville ............................................................ 52 5.1 Development of Longlist Options ................................................................................................. 53 5.1.1 Option 1 – Te Atatu Road ..................................................................................................... 54 5.1.2 Option 2 – Te Atatu Road – Avoiding Difficult Coastal Areas ............................................... 55 5.1.3 Option 3 - Te Atatu Road – Avoiding Difficult Coastal Areas and the Use of Deep Tunnels 56 5.1.4 Option 4 - Te Atatu Road – Avoiding Difficult Coastal Areas and the Use of Deep Tunnels with Alternate Harbour Crossing ....................................................................................................... 57 5.1.5 Option 5 – Matipo Road ........................................................................................................ 58 5.1.6 Option 6 – Matipo Road – Alternate Pipeline Alignment ....................................................... 59 5.1.7 Option 7 – Henderson Creek ................................................................................................ 60 5.1.8 Option 8 – North Western Motorway ..................................................................................... 61 5.1.9 Option 9 – Gloria Road ......................................................................................................... 62 5.1.10 Option 10 – Direct to Te Atatu Road ..................................................................................... 63 5.1.11 Option 11 – Tunnel ............................................................................................................... 64 5.1.12 Option 12 – Gravity Micro-Tunnel ......................................................................................... 65 5.1.13 Option 13 – Full Route Rising Main ...................................................................................... 66 5.2 Qualitative