Embley

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Contents3.10.7 Maintenance.........................................................................................................................3.433.10.8 Monitoring ............................................................................................................................3.433.10.9 Decommissioning and Closure ........................................................................................3.444 CLIMATE4.1 Meteorology ...................................................................................................................4.14.1.1 Temperature ...........................................................................................................................4.24.1.2 Humidity .................................................................................................................................4.24.1.3 Rainfall ....................................................................................................................................4.24.1.4 Wind .........................................................................................................................................4.34.2 Extreme Events ..............................................................................................................4.44.2.1 Cyclones ..................................................................................................................................4.44.2.2 Flooding ..................................................................................................................................4.84.3 Climate Change Adaptation ...........................................................................................4.94.3.1 Temperature ...........................................................................................................................4.94.3.2 Rainfall, Water Supply and Flooding .................................................................................4.94.3.3 Sea Level .................................................................................................................................4.94.3.4 Bushfires .................................................................................................................................4.94.3.5 Tropical Cyclones ................................................................................................................4.104.3.6 Mitigation Measures ...........................................................................................................4.105 WATER RESOURCES ................................................................................................5.15.1 Surface Water ................................................................................................................5.15.1.1 Surface Water Hydrology .....................................................................................................5.15.1.2 Existing Surface Water Users ..............................................................................................5.95.1.3 Stream Geomorphology ......................................................................................................5.95.1.4 Surface Water Quality ........................................................................................................5.195.2 Surface Water – Potential Impacts and Mitigation Measures ................................. 5.305.2.1 Water Supply ........................................................................................................................5.305.2.2 Site Water Management ....................................................................................................5.325.2.3 Surface Water Supply .........................................................................................................5.365.2.4 Mining and Catchment Hydrology ...................................................................................5.495.2.5 Surface Water Quality Impacts .........................................................................................5.535.2.6 Regulatory Requirements ..................................................................................................5.545.3 Groundwater ............................................................................................................... 5.555.3.1 Regional Hydrogeology ......................................................................................................5.555.3.2 Shallow Aquifer ...................................................................................................................5.575.3.3 Shallow Groundwater Quality ...........................................................................................5.665.3.4 Artesian Aquifer ...................................................................................................................5.695.3.5 Artesian Groundwater Quality ..........................................................................................5.735.4 Groundwater – Potential Impacts and Mitigation Measures ................................... 5.745.4.1 Shallow Aquifer ...................................................................................................................5.745.4.2 Artesian Aquifer ...................................................................................................................5.745.4.3 Regulatory Requirements ........................................................................................... 5.815.5Monitoring ................................................................................................................... 5.835.5.1 Surface Water ......................................................................................................................5.835.5.2 Shallow Aquifer ...................................................................................................................5.865.5.3 Artesian Aquifer ...................................................................................................................5.866 MARINE ................................................................................................................6-16.1 Physical Environment and Coastal Processes ............................................................6.16.1.1 Bathymetry .............................................................................................................................6.16.1.2 Existing Coastal Processes and Hydrodynamics ............................................................6.26.1.3 Currents and Tides ................................................................................................................6.96.1.4 Waves ....................................................................................................................................6.106.1.5 Sediment Movement ..........................................................................................................6.146.2 Marine Protected Areas, Conservation Areas and Biodiversity Areas ................... 6.15

Contents6.3 Marine Habitats ........................................................................................................... 6.166.3.1 Benthic Habitat Survey Methods .....................................................................................6.166.3.2 Inshore and Offshore Reef Habitats ................................................................................6.186.3.3 Mangrove Habitat ................................................................................................................6.246.3.4 Seagrass Habitat .................................................................................................................6.256.3.5 Soft Sediment Habitats ......................................................................................................6.306.4 Water Quality .............................................................................................................. 6.316.4.1 Environmental Values and Water Quality Objectives ..................................................6.316.4.2 Marine Water Quality Assessment Methods .................................................................6.326.4.3 Short-Term Physical and Chemical Water Quality Assessment ................................6.346.4.4 Long-Term Water Quality Assessment: Turbidity, TSS and PAR ...............................6.406.5 Sediment Characteristics ........................................................................................... 6.496.5.1 Port Area Dredging and Spoil Disposal Requirements ................................................6.496.5.2 Ferry and Barge Terminals Dredging and Spoil Disposal Requirements .................6.506.5.3 Sediment Assessment Framework ..................................................................................6.526.5.4 Port Area Sediment Characterisation ..............................................................................6.526.5.5 Proposed Offshore Spoil Ground Sediment Characterisation ....................................6.706.5.6 Barge and Ferry Terminals Sediment Characterisation ..............................................6.746.5.7 Albatross Bay Spoil Ground Sediment Characterisation .............................................6.966.6 Marine Fauna ............................................................................................................... 6.966.6.1 Listed Threatened and Migratory Species ......................................................................6.996.6.2 Whales and Dolphins (Cetaceans) ................................................................................6.1106.6.3 Dugong................................................................................................................................6.1116.6.4 Sharks and Rays ................................................................................................................6.1126.6.5 Marine Turtles ....................................................................................................................6.1126.6.6 Sea Snakes .........................................................................................................................6.1216.6.7 Bony Fish and Nektobenthic Marine Invertebrates ....................................................6.1116.6.8 Macrobenthic Infauna ......................................................................................................6.1236.6.9 Introduced Marine Species ..............................................................................................6.1236.7 Marine Fisheries Resources ..................................................................................... 6.1246.7.1 Northern Prawn Fishery ...................................................................................................6.1276.7.2 Gulf of Carpentaria Commercial Fisheries ...................................................................6.1276.7.3 Recreational Fishery .........................................................................................................6.1276.8 Environmental Values .............................................................................................. 6.1286.9 Potential Impacts and Mitigation Measures – Marine ............................................ 6.1306.9.1 Altered Coastal Processes ...............................................................................................6.1306.9.2 Marine Water Quality Impacts ........................................................................................6.1316.9.3 Marine Habitat Impacts....................................................................................................6.1566.9.4 Marine Fauna Impacts ......................................................................................................6.1646.9.5 Summary of EPBC Act “Significance of Impact” Assessments for Threatenedand Migratory Fauna ...........................................................................................................6.1746.9.6 Marine Fisheries Resources Impacts.............................................................................6.1866.9.7 Cumulative Marine Impacts ............................................................................................6.1886.9.8 Summary of Impact Mitigation Strategies ...................................................................6.1886.10 Dredge Management Plan Outline ......................................................................... 6.193FIGURESFigure 1-1 Locality Map ...............................................................................................................1.2Figure 1-2 Existing Facilities North of the Embley River .......................................................1.3Figure 1-3 Infrastructure and Conceptual 40-Year Mine Plan .............................................1.6Figure 1-4 Infrastructure and Conceptual 40-Year Mine Plan – Aerial Photo ...................1.7Figure 2-1 Land Tenure and Local Government Boundaries ...............................................2.2Figure 2-2 Indigenous Land Use Agreement Area .................................................................2.4Figure 2-3 Humbug Barge Terminal .........................................................................................2.6Figure 2-4 Hornibrook Ferry Terminal ......................................................................................2.7Figure 2-5 Hey River Barge/Ferry Terminal .............................................................................2.9Figure 2-6 Port Layout ................................................................................................................2.10Figure 2-7 Boyd Infrastructure Area ........................................................................................2.11Figure 2-8 Norman Creek Infrastructure Area .......................................................................2.14Figure 2-9 Port, Spoil Ground and Mooring Locations.........................................................2.19

ContentsFigure 2-10 Construction Camp Layout ....................................................................................2.21Figure 2-11 Mine Access Road Cross Section .........................................................................2.24Figure 3-1 Current Land Use.......................................................................................................3.2Figure 3-2 Geology and Topography .........................................................................................3.4Figure 3-3 Geological Cross Section from East to West (Project Area) ..............................3.5Figure 3-4 Stratigraphy ................................................................................................................3.7Figure 3-5 Mineralised Areas ......................................................................................................3.8Figure 3-6 Soil Profile Locations ..............................................................................................3.10Figure 3-7 Soil Mapping Units ..................................................................................................3.13Figure 3-8 Pre-Mine Land Suitability ......................................................................................3.25Figure 3-9 Acid Sulphate Soil Test Pit Sites at Humbug Barge Terminal ........................3.30Figure 3-10 Acid Sulphate Soil Drill Hole and Test Pit Location atHey River Barge/ferry Terminal ............................................................................3.35Figure 4-1 Wind Rose for Typical Dry Season (June), Weipa ................................................4.3Figure 4-2 Wind Rose for Typical Wet Season (January), Weipa .........................................4.3Figure 5-1 Weipa Region Catchment Boundaries ...................................................................5.2Figure 5-2 Project Area Catchment Boundaries .....................................................................5.3Figure 5-3 Surface Water Monitoring Locations......................................................................5.5Figure 5-4 Streamflow in Response to Rainfall .......................................................................5.6Figure 5-5 Geomorphic Assessment Site Locations ............................................................5.10Figure 5-6 Ward River Estuary Geomorphic Features .........................................................5.15Figure 5-7 Conductivity Profiles in Upper (WP8) and Lower (WP14) Ward River Estuary ......5.27Figure 5-8 Boyd Water Management System ........................................................................5.33Figure 5-9 Norman Creek Water Management System ......................................................5.34Figure 5-10 Dam C Cross Section ..............................................................................................5.38Figure 5-11 Dam C Spillway Design ..........................................................................................5.39Figure 5-12 Flow Downstream of Dam C at 15Mdptpa .........................................................5.44Figure 5-13 Flow Downstream of Dam C at 30Mdptpa .........................................................5.44Figure 5-14 Flow Downstream of Dam C at 50Mdptpa .........................................................5.45Figure 5-15 Flow from Norman Creek Catchment..................................................................5.45Figure 5-16 Norman Creek Flow at Dam C (15Mdptpa)........................................................5.46Figure 5-17 Norman Creek Flow at Dam C (30Mdptpa)........................................................5.46Figure 5-18 Norman Creek Flow at Dam C (50Mdptpa)........................................................5.47Figure 5-19 Ward River Pump Station Schematic – Plan View ............................................5.48Figure 5-20 Ward River Pump Station Schematic – Cross Section View............................5.48Figure 5-21 Cross Section through Artesian Host Formations ............................................5.56Figure 5-22 Groundwater Monitoring Locations......................................................................5.58Figure 5-23 Dry Season Water Table (November 2007) ........................................................5.59Figure 5-24 Wet Season Water Table (March 2008) ...............................................................5.60Figure 5-25 Water Table Cross Section .....................................................................................5.61Figure 5-26 Groundwater Level in Response to Rainfall – MB01 .........................................5.64Figure 5-27 Groundwater Level in Response to Rainfall – MB02 .........................................5.64Figure 5-28 Groundwater Level in Response to Rainfall – MB03 .........................................5.65Figure 5-29 Groundwater Level in Response to Rainfall – MB04 .........................................5.65Figure 5-30 Spring Locations ......................................................................................................5.72Figure 5-31 Predicted Drawdown Contours – 12 GL per annum Scenario Year 40 ..........5.79Figure 5-32 Proposed Surface Water Monitoring Locations .................................................5.85Figure 6-1 Beach profile and Proposed Jetty Structure. .......................................................6.2Figure 6-2 Gulf of Carpentaria Bathymetry and Model Boundaries ...................................6.3Figure 6-3 Inner Model Flexible Mesh Bathymetry and Model Boundarieswith Observational Data Locations ........................................................................6.4Figure 6-4 Global Tide Model Prediction at Outer Model Open Boundary Extents .........6.5Figure 6-5 Outer Model Water Level Prediction Compared with Weipa Storm Tide Gauge.....6.6Figure 6-6 Observed Water Levels at Beacon 2 Compared with Gulf Model Prediction ....6.6Figure 6-7 Measured (ADCP) Data Compared with Inner Model Prediction .....................6.7Figure 6-8 Predicted Peak Flood Tidal Currents at Proposed Port Dredging Are .............6.8Figure 6-9 Predicted Peak Ebb Tidal Currents at Proposed Port Dredging Area ..............6.8

ContentsFigure 6-10 Depth-averaged Measured Current Speed and Direction at Study Site .......6.10Figure 6-11 Boyd Point Wave Data Statistics during Tropical Cyclone Nelson .................6.11Figure 6-12 Tropical Cyclone Nelson Wind Field 5 February 2007 .....................................6.12Figure 6-13 SWAN Wave Model Boundaries with an Example of Tropical Cyclone Wind Field .. 6.13Figure 6-14 Modelled Highest Significant Wave Height at Proposed Port vs Measured at Buoy ...6.13Figure 6-15 Modelled Mean Wave Direction at Proposed Port vs Measured at Buoy .....6.14Figure 6-16 Modelled Wave Direction Frequency of Occurrence at Proposed Port Site .6.14Figure 6-17 Sub-tidal video survey locations .........................................................................6.17Figure 6-18 Reef habitat between Boyd Point and Thud Point ............................................6.20Figure 6-19 Sponge, soft coral and hard coral cover between Pera Head and Boyd Point .. 6.21Figure 6-20 Seagrass Meadow Type and Cover – Embley and Hey River Estuaries, 2009 ... 6.28Figure 6-21 Seabed at the Proposed New Spoil Ground .......................................................6.31Figure 6-22 Location of water quality survey locations .........................................................6.33Figure 6-23 Salinity Measured (October 2007) at Surface, Mid and Bottom Depths ......6.35Figure 6-24 ORP Measured (October 2007) at Surface, Mid and Bottom Depths ...........6.36Figure 6-25 pH Measured (October 2007) at Surface, Mid and Bottom Depths ............6.36Figure 6-26 Temperature Measured (October 2007) at Surface, Mid and Bottom Depths ..6.37Figure 6-27 Turbidity Measured (October 2007) at Surface, Mid and Bottom Depths ...6.38Figure 6-28 Turbidity as NTU-e Measured at Project Locations ..........................................6.41Figure 6-29 Turbidity and PAR Results for the Proposed Port Are ......................................6.42Figure 6-30 Turbidity and PAR Results for Pera Head............................................................6.42Figure 6-31 Turbidity and PAR Results for the Proposed New Spoil Ground Location ....6.43Figure 6-32 Scatterplot of Mean Daytime PAR (μm/m2/sec) against TSS (mg/L) ..........6.44Figure 6-33 Recorded Ambient Turbidity Event Durations December 2007 toMarch 2008 – Pera Head ........................................................................................6.46Figure 6-34 Recorded Turbidity Event Durations December 2007 toFebruary 2008 – Boyd Point ..................................................................................6.47Figure 6-35 Turbidity (NTU-e) and Wind Direction at Project Turbidity Logger Locations....6.48Figure 6-36 Turbidity, Spring and Neap Tidal Phases at Project Turbidity Logger Locations 6.49Figure 6-37 2007 and 2009 Sediment Sampling Sites at the Port Berth and Departure Area 6.54Figure 6-38 2010 Sediment Sampling Locations at the Port Berth, Departure Apron,Departure Channel Areas and Proposed New Spoil Ground (inset) ..................... 6.56Figure 6-39 Longitudinal Sediment Profile along Dredging Footprint ...............................6.57Figure 6-40 Particle Size Distribution at the Proposed Port Dredging Area during 2007and 2009 (top) and 2010 Surveys (bottom) .......................................................6.59Figure 6-41 NAGD Metals Contaminant Concentrations and Percentage FinesContent from Inshore to Offshore in 2010 Survey ............................................6.64Figure 6-42 Particle Size Distribution for Proposed Spoil Ground Samples ......................6.71Figure 6-43 Sediment Sampling Locations and Detailed Seagrass Video Transectsat Hornibrook Ferry Terminal ................................................................................6.75Figure 6-44 Sediment Sampling Locations and Detailed Seagrass Video Transectsat Humbug Barge Terminal ...................................................................................6.76Figure 6-45 Sediment Sampling Locations and Detailed Seagrass Video Transectsat Hey River Barge/Ferry Terminal ......................................................................6.77Figure 6-46 Particle Size Distribution within the Hornibrook Terminal Dredging Area ...6.78Figure 6-47 Particle Size Distribution within the Humbug Terminal Dredging Area .......6.84Figure 6-48 Particle Size Distribution within the ...................................................................6.90Figure 6-49 Particle Size Distribution Results for the Albatross Bay Spoil Ground .........6.98Figure 6-50 Nesting Locations for Hawksbill Turtles (top) and Green Turtles (bottom) .....6.113Figure 6-51 Nesting Locations for Loggerhead Turtles (top) and Flatback Turtles (bottom) 6.114Figure 6-52 Nesting Locations for Olive Ridley Turtles (top) andLeatherback Turtles (bottom) .............................................................................6.115Figure 6-53 Location of Turtle Nesting Activity May – July 2007 and April 2008 ...........6.119Figure 6-54 Permitted Fishing Area of the Northern Prawn Fishery .................................6.125Figure 6-55 Total Catch of Banana Prawns for Each Area of the NorthernPrawn Fishery, 2006 ..................................................................................... 6.126Figure 6-56 Prawn Catch – Eastern Gulf of Carpentaria Region of the Northern Prawn Fishery ..6.126Figure 6-57 Recreational fishing spots near port area infrastructure andproposed spoil ground ..........................................................................................6.129Figure 6-58 Dredge Time Series Adopted for Mud Transport Model Runs ......................6.134Figure 6-59 Above Background TSS Concentration Time Series Extract at

ContentsPera 1 and Boyd 1 .........................................................................................................6.135Figure 6-60a Dredge plume dispersion model (median and 80th percentile cases) forport area dredging and disposal at the proposed new spoil ground (Period 2) ......6.137Figure 6-61 Location of modelled time series extracts........................................................6.140Figure 6-62 Time Series Extract from the Plume Model over the Nine-Month Dredge Period 6.143Figure 6-63a 5 mg/L Percentage Exceedance Plots for Dredge Period 2 (top)and Dredge Period 3 (bottom). ...........................................................................6.144Figure 6-64 Median case sediment deposition predicted duringdredge Periods 2, 3 and 4 ............................................................................ 6.150Figure 6-65a Light availability prediction for Boyd Point and Pera Head Reefs.Includes ambient, Period 2, Period 3 and Period 4. ........................................6.158Figure 6-66 Infauna monitoring locations at the proposed offshore spoil ground ........6.173TABLESTable 1-1 Indicative Production Scenario for EIS ..................................................................1.8Table 1-2 Project Approvals, Permits and Licences ............................................................1.22Table 2-1 Land Parcels and Tenure .........................................................................................2.3Table 2-2 Construction Equipment ........................................................................................2.12Table 2-3 Operations Workforce .............................................................................................2.22Table 2-4 Average Annual Water Balance ............................................................................2.25Table 3-1 Soil Types identified in the Project area..............................................................3.12Table 3-2 Erosion Potential and Erosion and Sedimentation Control .............................3.20Table 3-3 Land Suitability Classes .........................................................................................3.23Table 3-4 Land Suitability of the Project area ......................................................................3.24Table 3-5 Environmental Management Register and Contaminated Land Register Status .... 3.27Table 3-6 Project Notifiable Activities ...................................................................................3.27Table 3-7 Results of Acid Sulphate Soils Tests – Humbug Barge Terminal .................3.31Table 3-8 Results of Acid Sulphate Soils Tests – Hey River Barge/ferry Terminal .......3.36Table 4-1 Climate Averages – Eastern Avenue Station, Weipa ..........................................4.1Table 4-2 Rainfall Averages – Aurukun Station .....................................................................4.2Table 4-3 Tropical Cyclone Category Descriptions ...............................................................4.4Table 4-4 Tropical Cyclones on the Eastern Coast of the Gulf of Carpentaria ................4.5Table 4-5 Measured and Modelled Water Levels above Lowest Astronomical Tide .......4.7Table 4-6 Flood Design Criteria for Land-based Infrastructure ..........................................4.8Table 5-1 Catchment Areas .......................................................................................................5.1Table 5-2 Project Area Creek Characteristics .........................................................................5.4Table 5-3 AWBM Calibration Parameters ................................................................................5.8Table 5-4 Partitioning of Annual Rainfall ................................................................................5.8Table 5-5 Northern region Project area stream types ........................................................5.11Table 5-6 Mean Streamflow at Dam C ..................................................................................5.18Table 5-7 Sampling Location by Category and Catchment...............................................5.20Table 5-8 Sampling Location, Habitat and Catchment ......................................................5.21Table 5-9 SoE Project Freshwater Stream Quality Statistics ............................................5.23Table 5-10 SoE Project Freshwater Tree Swamp Stream Quality Statistics .....................5.24Table 5-11 SoE Project Estuarine and Marine Water Quality Statistics ............................5.25Table 5-12 Comparison of Fresh Water Quality in Tropical Streams.................................5.26Table 5-13 Average Annual Water Demand ...........................................................................5.31Table 5-14 Average Annual Water Supply ..............................................................................5.32Table 5-15 Tailings Storage Facility Design Criteria..............................................................5.35Table 5-16 Water Supply Dam Summary ...............................................................................5.37Table 5-17 Effect of Dam C on Monthly Downstream Flow at 15Mdptpa ........................5.40Table 5-18 Effect of Dam C on Monthly Downstream Flow at 30Mpdtpa ........................5.41Table 5-19 Effect of Dam C on Monthly Downstream Flow at 50Mpdtpa ........................5.42Table 5-20 Effect of Pumping from Ward River on Monthly Downstream Flow..............5.49Table 5-21 SoE Project AWBM Water Balance Characteristics ...........................................5.49Table 5-22 Impact of Mining on Catchment Discharge .......................................................5.51Table 5-23 Monitoring Bore Network .......................................................................................5.62

ContentsTable 5-24 SoE Project Groundwater Quality Results ..........................................................5.67Table 5-25 Artesian Aquifer Monitoring Bores .......................................................................5.71Table 5-26 Artesian Water Quality............................................................................................5.73Table 5-27 Abstraction Scenarios .............................................................................................5.75Table 5-28 Predicted Drawdown ...............................................................................................5.78Table 5-29 Spring Factor Multipliers from GAB-ROP ...........................................................5.80Table 5-30 Spring Factors ..........................................................................................................5.81Table 5-31 Proposed Surface Water Monitoring Program ...................................................5.84Table 5-32 Monitoring Regime ..................................................................................................5.86Table 6-1 Weipa Tidal Planes ....................................................................................................6.9Table 6-2 Benthic Habitat Surveys .........................................................................................6.18Table 6-3 Inshore Reef Areas and Extent of Dominant Benthic Assemblages .............6.19Table 6-4 Summary of Project Long-Term Data Collection Program .............................6.34Table 6-5 Dissolved Metal Concentrations in Water Samples, October 2007 ...............6.39Table 6-6 Nutrient and Chlorophyll-a Concentrations in Water Samples, October 2007 . 6.40Table 6-7 Summary of Background Turbidity Data ............................................................6.40Table 6-8 Statistical Summary of PAR at Project Logger Locations ...............................6.43Table 6-9 Predicted Mean Light Regimes and Light Attenuation Coefficient (Kd m )for Varying Ambient TSS Conditions and Depth Intervals (–12 to –1mLAT) 6.45Table 6-10 Summary of 2010 Inshore Particle Size Distributions .....................................6.58Table 6-11 Summary of 2010 Offshore Particle Size Distributions ...................................6.57Table 6-12 Summary of Sediment Quality for Metals and Organotins – Port Berthand Departure Area in 2007 and 2009 ................................................................6.61Table 6-13 Summary of Sediment Quality for Metals – Port Berth, DepartureArea and Departure Channel Area in 2010. .......................................................6.63Table 6-14 Summary Results for DAE Analysis on Metals – Port Berth andDeparture Area in 2007 and 2009 ........................................................................6.65Table 6-15 Summary Results for DAE Analysis on Metals – Port Berth Area,Departure Apron and Departure Channel in 2010 ..........................................6.66Table 6-16 Summary Results for Elutriate Analysis of Metals – Port BerthTable 6-17and Departure Area in 2007 and 2009. ...............................................................6.68Summary Results for Elutriate Analysis of Metals – Port Berth,Departure Apron and Departure Channel in 2010 ..........................................6.69Table 6-18 Summary of Sediment Particle Size at the Proposed Spoil Ground .............6.71Table 6-19 Summary of Sediment Quality for Metals at Proposed Spoil Ground in 2010 .......6.72Table 6-20 Comparison of Sediment Quality between Proposed Spoil Ground and Port Area ......6.73Table 6-21 Summary of Sediment Particle Size within the Hornibrook Terminal Dredging Area ......6.78Table 6-22 Summary of Sediment Quality – Hornibrook Terminal ..................................6.80Table 6-23 Results of SPOCAS Acid Sulphate Soils Tests – Hornibrook Terminal .........6.82Table 6-24 Summary of Sediment Particle Size within the Humbug Terminal Dredging Area .6.84Table 6-25 Summary of Sediment Quality Analysis Results – Humbug Terminal .........6.86Table 6-26 Results of SPOCAS Acid Sulphate Soils Tests – Humbug Terminal ..............6.88Table 6-27 Summary of Sediment Particle Size within the Hey River Terminal Dredging Area .....6.90Table 6-28 Summary of Arsenic Total, Elutriate and Dilute Acid Extraction Results .....6.91Table 6-29 Summary of Sediment Quality Analysis Results – Hey River Terminal........6.92Table 6-30 Results of SPOCAS Acid Sulphate Soils Tests – Hey River Terminal ............6.95Table 6-31 History of Disposal at the Albatross Bay Spoil Ground (2002-2008)............6.96Table 6-32 Port of Weipa 2008 Maintenance Dredging Sediment Characterisation ......6.97Table 6-33 Summary of Sediment Particle Size at the Albatross Bay Spoil Ground .....6.99Table 6-34 EPBC Act “Protected Matters Search Tool” Coordinates .................................6.99Table 6-35 Threatened and Migratory Marine Species Status ..........................................6.100Table 6-36 Sea Turtle Foraging Characteristics ...................................................................................6.116Table 6-37 Sea Turtle Tracks and Associated Nests in the Survey Area, 2007 and April 20086.117Table 6-38 Taxa Richness and Abundance of Macrobenthic Infauna at the Three Survey Sites ....6.123Table 6-39 Five Dominant Macrobenthic Infaunal Taxa at the Three Survey Sites ......6.123Table 6-40 Potential Impacts During Construction and Operation ..................................6.130Table 6-41 Dredge Material Characteristics Used in Plume Modelling ..........................6.132Table 6-42 Adopted Spill Rates (kg/s) for the Dredging Scenario ...................................6.133Table 6-43Dredge Event Duration and Median Plume TSS ConcentrationAbove Background at Pera 1 . .............................................................................6.135

ContentsTable 6-44 Above Background TSS Summary Statistics for Plumes at Inshore Locations .6.141Table 6-45 Above Background Total Suspended Solids Summary Statisticsfor Dredge Plumes at the Proposed Spoil Ground and Nine Mile Reef ...............6.147Table 6-46 Summary Statistics - Sediment Deposition (mg/cm 2 /day)..........................6.151Table 6-47 Annual Siltation Depth of Port Area Based on Wave Exceedance...............6.155Table 6-48 Hard Coral Habitat for Overall Reef Areas, Boyd Point, Pera Headand Reefs South of Thud Point During Ambient, Dredging Period 2,Period 3 and Period 4 ............................................................................................6.160Table 6-49 Summary of Main Potential Impacts on Marine Fauna .................................6.165Table 6-50 Lighting Plan .............................................................................................................................6.169Table 6-51 Summary of proposed construction impact management and monitoring activities ..6.189Table 6-52 Summary of proposed operations impact management and monitoring activities ..6.191PLATESPlate 3-1 Red Kandosol soil ....................................................................................................3.15Plate 3-2 Tall Darwin stringybark and bloodwood woodland on the Kandosol soils ...3.16