Rothera Wharf Reconstruction & Coastal Stabilisation Draft Comprehensive Environmental Evaluation BAS Environment Office January 2018 1 2 Contents NON-TECHNICAL SUMMARY .......................................................................................................................... 11 1. INTRODUCTION ................................................................................................................................ 17 1.1. BACKGROUND TO DEVELOPMENT .............................................................................................................. 17 1.2. OVERVIEW OF PROPOSED DEVELOPMENT .................................................................................................... 17 1.2.1. Rothera Wharf ......................................................................................................................... 17 1.2.2. Coastal Stabilisation ................................................................................................................. 17 1.3. PURPOSE AND SCOPE OF DOCUMENT ......................................................................................................... 17 2. APPROACH TO ENVIRONMENTAL IMPACT ASSESSMENT ................................................................. 19 2.1. STATUTORY REQUIREMENTS ..................................................................................................................... 19 2.2. EIA METHODOLOGY ............................................................................................................................... 20 2.3. CEEQUAL ............................................................................................................................................ 21 3. DESCRIPTION OF PROPOSED DEVELOPMENT 1 – ROTHERA WHARF ................................................. 22 3.1. PURPOSE AND NEED ............................................................................................................................... 22 3.2. LOCATION ............................................................................................................................................. 22 3.3. DESIGN DETAILS & SCOPE OF PREFERRED OPTION .......................................................................................... 23 3.4. ALTERNATIVES CONSIDERED ..................................................................................................................... 29 3.4.1. Do Nothing ............................................................................................................................... 29 3.4.2. Do Minimum ............................................................................................................................ 29 3.4.3. Alternative Designs .................................................................................................................. 30 3.5. OVERVIEW OF WORKS ............................................................................................................................. 36 3.6. LAYDOWN AREAS ................................................................................................................................... 36 3.7. EXISTING WHARF DISMANTLING METHODOLOGY ......................................................................................... 41 3.7.1. Assembly of Equipment (Construction Season 1) ..................................................................... 41 3.7.2. Dismantling of Existing Wharf ................................................................................................. 41 3.7.3. Assembly of New Wharf Structure ........................................................................................... 42 3.7.4. Preliminary Works for Mid and Rear Walls .............................................................................. 43 3.8. CONSTRUCTION METHODOLOGY ............................................................................................................... 44 3.8.1. Rear Wall to Mid Wall Construction ......................................................................................... 44 3.8.2. Back Fill Rear Wall to Mid Wall ................................................................................................ 45 3.8.3. Mid Wall to Front Wall Construction (Construction Season 2) ................................................. 46 3.8.4. Back Fill Mid Wall to Front Wall ............................................................................................... 47 3.8.5. Installation of Bollards and Davit Crane Foundations. ............................................................. 47 3.8.6. Underwater Rock Blasting ........................................................................................................ 47 3.8.7. Construction materials ............................................................................................................. 51 3.8.8. Equipment and vehicles ........................................................................................................... 51 3.9. ANTICIPATED WASTE ............................................................................................................................... 52 3.10. PERSONNEL ........................................................................................................................................... 54 3.11. PREDICTED LIFESPAN ............................................................................................................................... 55 3.12. PLANS FOR DECOMMISSIONING ................................................................................................................. 55 4. DESCRIPTION OF PROPOSED DEVELOPMENT 2 – QUARRYING, DRILLING & BLASTING ..................... 56 4.1. PURPOSE AND NEED ................................................................................................................................ 56 4.2. LOCATION ............................................................................................................................................. 57 4.3. DESIGN DETAILS ..................................................................................................................................... 58 4.4. ALTERNATIVES ....................................................................................................................................... 63 4.4.1. Importing rock fill ..................................................................................................................... 63 4.4.2. Sourcing rock at other local areas ............................................................................................ 63 4.5. METHODOLOGY ..................................................................................................................................... 63 3 4.5.1. Access and Egress to the Drill and Blast Area .......................................................................... 63 4.5.2. Drill and Blasting Methodology................................................................................................ 64 4.5.3. Load Haul & Rock Processing ................................................................................................... 64 4.5.4. Production rates ....................................................................................................................... 65 4.5.5. Equipment and vehicles ........................................................................................................... 66 4.6. ANTICIPATED WASTE ............................................................................................................................... 67 4.7. PERSONNEL ........................................................................................................................................... 67 4.8. PREDICTED LIFESPAN ............................................................................................................................... 68 4.9. PLANS FOR DECOMMISSIONING ................................................................................................................. 68 5. DESCRIPTION OF PROPOSED DEVELOPMENT 3 – COASTAL STABILISATION ...................................... 69 5.1. PURPOSE AND NEED ............................................................................................................................... 69 5.2. LOCATION ............................................................................................................................................. 70 5.3. PROPOSED WORKS ................................................................................................................................. 70 5.4. ALTERNATIVES CONSIDERED ...................................................................................................................... 71 5.4.1. Do Nothing ............................................................................................................................... 71 5.4.2. Do Minimum ............................................................................................................................ 71 5.4.3. Alternative Works .................................................................................................................... 72 5.4.4. Alternative Techniques ............................................................................................................. 72 5.5. LAYDOWN AREAS ..................................................................................................................................