GREATER WELLINGTON REGIONAL COUNCIL WELLINGTON HARBOUR NAVIGATIONAL RISK ASSESSMENT Report Number: 15NZ328 Issue: 04 Date: 31 August 2018 MARICO MARINE NEW ZEALAND LTD Report No: 15NZ328 Unrestricted Issue No: 04 Wellington Harbour Navigational Risk Assessment GREATER WELLINGTON REGIONAL COUNCIL WELLINGTON HARBOUR NAVIGATIONAL RISK ASSESSMENT Prepared for: Greater Wellington Regional Council Harbours Department Shed 39 Meridian Building Wellington Author(s): Ryan Hughes; John Riding; Dr Ed Ballard Checked By: John Riding Date Release Prepared Authorised Notes 10/08/17 Issue 1 JFR/GP JFR 31/08/17 Issue 2 GER/JFR/Dr Ed JFR QA Update 29/12/17 Issue 3 JFR/Dr Ed JFR Review update after Client Comments 31/08/2018 Issue 04 JFR JFR Incorporating GWRC and (Client Release) Centreport Comments; 06- 2018 Marico Marine NZ Ltd Level 11 156 Willis Street Wellington 6011 New Zealand 31/08/2018 15NZ328 Wellington Harbour Risk Assessment 31-08-18 - Issue 4 Final Release Page ii Report No: 15NZ328 Unrestricted Issue No: 04 Wellington Harbour Navigational Risk Assessment CONTENTS Abbreviations Synopsys 1 INTRODUCTION ................................................................................................... 1 1.1 Purpose and Scope ..................................................................................... 1 1.2 The New Zealand Port and Harbour Marine Safety Code ............................. 3 1.3 The Public Right to Navigate ....................................................................... 4 1.3.1 The Harbour Authority and the Harbour Master ............................................. 5 1.3.2 The NZ Maritime Transport Act 1994 (As Amended) ....................................... 6 1.4 The Importance of Risk Assessment to Ports and Harbours ......................... 7 1.5 CentrePort and Wellington Harbour Master – SLA ...................................... 8 1.6 Previous Risk Assessment and SMS Development ....................................... 8 1.7 Wellington Harbour Seismic Risk ................................................................ 9 1.7.1 Wellington Fault Lines .................................................................................... 10 2 METHODOLOGY ................................................................................................ 13 2.1 Introduction ............................................................................................. 13 2.1.1 Risk Type Definitions ...................................................................................... 13 2.2 Stage 1 – Data Gathering and System Assessment .................................... 14 2.3 Stage 2 – Hazard Identification and scoring ............................................... 14 2.4 Stage 3 - Risk Analysis and HAZMAN II ...................................................... 15 2.4.1 Risk Scoring and Ranking System .................................................................. 16 2.4.2 The Harbour Baseline ..................................................................................... 16 2.5 Stage 4 – Risk Control Assessment ............................................................ 17 2.5.1 Risk Mitigation - Existing Controls .................................................................. 17 2.5.2 New Risk Mitigation ....................................................................................... 18 2.6 Stage 5 – Reporting and Risk Management Recommendations ................. 18 2.7 Risk Criteria .............................................................................................. 18 2.7.1 Risk Matrix ...................................................................................................... 19 2.7.2 Risk Mitigation Action Criteria ........................................................................ 20 2.8 Use of the Concept of ALARP in this Risk Assessment ................................ 21 3 RISK ASSESSMENT AREAS .................................................................................. 23 3.1 Area A : Approaches ................................................................................. 24 3.1.1 Area A – Physical Description ......................................................................... 24 3.1.2 Area A : Approaches – Current, Wind and Wave Climate .............................. 25 15NZ328 Wellington Harbour Risk Assessment 31-08-18 - Issue 4 Final Release Page iii Report No: 15NZ328 Unrestricted Issue No: 04 Wellington Harbour Navigational Risk Assessment 3.1.3 Area A : Approaches- Navigational Use .......................................................... 29 3.1.4 Area A: Approaches - Harbour Limit Modifications ....................................... 30 3.1.5 Area A : Approaches – Navigational Incidents of Note .................................. 30 3.1.6 Area A : Incident Case Study – AAL BRISBANE ............................................... 31 3.1.7 Area A : Incident Case Study – Passenger RoRo and Inbound Tanker ........... 33 3.2 Area B – Entrance ..................................................................................... 34 3.2.1 Area B – Entrance – Physical Description ....................................................... 34 3.2.2 Area B: Entrance - Channel Morphology ........................................................ 35 3.2.3 Area B: Entrance - Wind and Wave Regime ................................................... 36 3.2.4 Area B : Entrance - Tidal Regime .................................................................... 38 3.2.5 Area B : Entrance - Navigational Use .............................................................. 38 3.2.6 Area B : Entrance – Navigational Incidents of Note ....................................... 39 3.2.7 Area B : Entrance – Harbour Ferry Incident Case Study ................................. 41 3.3 Area C – Main Harbour ............................................................................. 41 3.3.1 Area C : Main Harbour – Physical Description ................................................ 42 3.3.2 Area C : Main Harbour - Wind and Wave Climate .......................................... 42 3.3.3 Area C : Main Harbour - Tidal Regime ............................................................ 42 3.3.4 Area C : Main Harbour - Navigational Use ..................................................... 42 3.3.5 Area C : Main Harbour - Navigational Issues and Incidents of Note .............. 43 3.3.6 Area C : Main Harbour – Incidents of Note .................................................... 44 3.3.7 Area C : Incident Case Study – CITRUS SPIRIT ................................................ 45 3.4 Area D : Lambton Harbour ........................................................................ 47 3.4.1 Area D : Lambton Harbour Physical Characteristics ....................................... 47 3.4.2 Area D : Lambton Harbour Navigational Use ................................................. 48 3.4.3 Area D : Lambton Harbour Berthing ............................................................... 49 3.4.4 Area D : Lambton Harbour Recreational Use ................................................. 49 3.4.5 Area D : Lambton Harbour - Navigational Incidents of Note ......................... 51 3.5 Area E – Evans Bay ................................................................................... 52 3.5.1 Area E :- Evans Bay Physical Description, Morphology and Bathymetry ....... 53 3.5.2 Area E : Evans Bay Berthing – Tankers ........................................................... 53 3.5.3 Area E : Evans Bay Navigational Use .............................................................. 54 3.5.4 Area E : Evans Bay - Navigational Incidents of Note ...................................... 55 3.6 Area F : Seaview ....................................................................................... 55 3.6.1 Area F : Seaview - Coastal Morphology and Bathymetry ............................... 55 3.6.2 Area F : Seaview - Wind and Wave Climate ................................................... 56 15NZ328 Wellington Harbour Risk Assessment 31-08-18 - Issue 4 Final Release Page iv Report No: 15NZ328 Unrestricted Issue No: 04 Wellington Harbour Navigational Risk Assessment 3.6.3 Area F : Seaview - Tidal Regime ...................................................................... 56 3.6.4 Area F : Seaview - Navigational Use ............................................................... 56 3.6.5 Area F : Seaview - Navigational Incidents of Note ......................................... 57 3.7 Summary of Risk Assessment Areas .......................................................... 58 3.7.1 Area A : Approaches ....................................................................................... 58 3.7.2 Area B : Entrance ............................................................................................ 58 3.7.3 Area C : Main Harbour .................................................................................... 58 3.7.4 Area D : Lambton Harbour ............................................................................. 58 3.7.5 Area E : Evans Bay........................................................................................... 59 3.7.6 Area F : Seaview ............................................................................................. 59 4 WELLINGTON TRAFFIC PROFILE ANALYSIS .......................................................... 60 4.1 Introduction ............................................................................................