Plan for Ravensworth Complex Water Management Document Number: RAVCX-307024981-4592 Version: 6.0 Owner: Environment and Community Coordinator Ravensworth Operations Plan Ravensworth Complex Water Management Table of Contents 1 Introduction ............................................................................................................................. 6 1.1 Background .....................................................................................................................6 1.1.1 Project Approval ....................................................................................................... 6 1.1.2 Environmental Protection Licence................................................................................ 6 1.2 Stakeholder Consultation Regarding this Document ...............................................................9 1.3 Responsibilities Regarding this Document ............................................................................9 2 Commitment Table ............................................................................................................... 10 3 Water Management .............................................................................................................. 14 3.1 Clean Water Runoff......................................................................................................... 14 3.2 Mine Water Management System ...................................................................................... 14 3.3 Water Storages .............................................................................................................. 14 3.4 Raw Water..................................................................................................................... 18 3.5 Potable Water ................................................................................................................ 18 3.6 Wastewater.................................................................................................................... 18 3.7 Industrial Water System ................................................................................................... 18 3.8 Participation of the Greater Ravensworth Water Sharing System............................................ 18 3.9 Creek Diversion Management ........................................................................................... 20 4 Site water balance ................................................................................................................ 20 4.1 Water Sources ............................................................................................................... 20 4.2 Water Demands and Losses............................................................................................. 20 4.2.1 Water Efficiency .......................................................................................................21 4.3 Water Transfer and Disposal ............................................................................................ 21 4.4 Future Water Balance...................................................................................................... 21 4.5 Annual Water Balance ..................................................................................................... 22 5 Erosion and sediment control............................................................................................ 22 5.1 Sources of Sediment ....................................................................................................... 23 5.2 Potential for Erosion ........................................................................................................ 23 5.3 Potential to Affect Flooding ............................................................................................... 23 5.4 Erosion and Sediment Control Measures ............................................................................ 23 5.5 Topsoil Management ....................................................................................................... 24 5.5.1 Works within Watercourses .......................................................................................24 5.5.2 Temporary Waterway Crossings.................................................................................24 5.5.3 New Access Tracks ..................................................................................................24 5.6 Erosion and Sediment Control Structures ........................................................................... 25 5.6.1 Sediment Dams .......................................................................................................25 5.7 Flood Management Structures .......................................................................................... 25 6 Water Quality Monitoring .................................................................................................... 26 6.1 Surface Water Monitoring Methodology .............................................................................. 26 Number: RAV SD PLN 0057 Status: Draft Effectiv e: Page 2 of 119 Owner: Env ironment and Community Coordinator Version: 5.2 Rev iew: Uncontrolled unless viewed on the intranet Ravensworth Operations Plan Ravensworth Complex Water Management 6.1.1 Surface Water Quality...............................................................................................26 6.1.2 Channel Stability and Stream Health...........................................................................30 6.1.3 Onsite Water Monitoring............................................................................................30 6.1.4 HRSTS Discharges ..................................................................................................31 6.2 Surface Water Impact and Assessment .............................................................................. 31 6.2.1 Stream Health and Impacts .......................................................................................31 6.2.2 Licence Condition.....................................................................................................32 6.3 Groundwater Monitoring Methodology ................................................................................ 32 6.3.1 Groundwater Inflows and Seepage .............................................................................32 6.3.2 Groundwater Quality and Levels.................................................................................32 6.3.3 Existing Groundwater Users ......................................................................................32 6.3.4 Groundwater Dependent Ecosystems .........................................................................32 6.4 Groundwater Impact and Assessment ................................................................................ 33 6.4.1 Groundwater Extraction ............................................................................................33 6.4.2 Groundwater Quality.................................................................................................35 6.4.3 Groundwater Levels .................................................................................................38 7 Trigger Action Response Plan ........................................................................................... 38 8 Inspection and Maintenance requirements...................................................................... 42 8.1 Water Storages .............................................................................................................. 42 8.2 Pipes and Pumps............................................................................................................ 42 8.3 Equipment Testing .......................................................................................................... 42 8.4 Erosion and Sediment Controls ......................................................................................... 42 9 Reporting requirements ...................................................................................................... 42 9.1 Internal Reporting ........................................................................................................... 42 9.2 External Reporting .......................................................................................................... 43 9.3 Community Consultation .................................................................................................. 43 10 Implementation and Review ............................................................................................... 43 11 References ............................................................................................................................ 44 12 Glossary, Abbreviations and Acronyms .......................................................................... 44 13 Document Information......................................................................................................... 48 13.1 Change Information......................................................................................................... 48 Appendix A - Project Approvals and Other Conditions.......................................................... 50 Appendix B - Creek Diversion Management Plan – Bayswater and Emu Creek ................ 62 14 Introduction ........................................................................................................................... 62 14.1 Background