Hydrology, quality SW1 For all precincts (with the exception of the western turnback) design permanent and temporary All (except Construction/ SW001 to and waste works and, if necessary, develop and implement emergency flood management measures for western Operation SW003, management: To the tunnels, tunnel portals, access shafts, station entrances and Arden electrical substation to turnback) SW005, protect waterways and provide appropriate protection against floodwaters and overland stormwater flows. SW007, waterway function and SW009, This would be informed by a flood immunity risk assessment that considers a range of events, surface water and SW010, and to the requirements and satisfaction of the responsible authority. groundwater quality in SW011, accordance with SW014, statutory objectives, to SW015, identify and prevent SW018, potential adverse SW019, environmental effects SW022, resulting from the SW024, disturbance of SW025, contaminated or SW027, material and SW029, to manage excavation SW030 to spoil and other waste SW032 in accordance with SW2 For all precincts: All Construction/ SW004, relevant best practice Operation SW006, principles Maintain existing flood plain storage capacity potentially impacted by the project, to the SW008, requirements and satisfaction of the responsible authority SW012, Permanent and associated temporary construction works must not increase flood levels that SW013, result in an additional flood risk to the requirements and satisfaction of the responsible SW016, authority SW017, SW020, Ensure permanent and associated temporary works do not increase flow velocities that SW021, would potentially affect the stability of property, structures or assets, and/or result in erosion SW023, during operation or construction, to the requirements and satisfaction of the responsible SW026, authority SW028, Undertake modelling of the design of permanent and temporary works to demonstrate the SW033, resultant flood levels and risk profile to the satisfaction of the responsible authority. SW034 Also refer to the following Environmental Performance Requirements for Water’: AE6 ‘Surface Aquatic ecology and health
Hydrology, quality and waste management: To protect waterways and waterway function and surface water and groundwater quality in accordance with statutory objectives, to identify and prevent potential adverse environmental effects resulting from the disturbance of contaminated or material and to manage excavation spoil and other waste in accordance with relevant best practice principles SW1 For all precincts (with the exception of the western turnback) design permanent and temporary works and, if necessary, develop and implement emergency flood management measures for the tunnels, tunnel portals, access shafts, station entrances and Arden electrical substation to provide appropriate protection against floodwaters and overland stormwater flows. This would be informed by a flood immunity risk assessment that considers a range of events, and to the requirements and satisfaction of the responsible authority. All (except western turnback) Construction/ Operation SW001 to SW003, SW005, SW007, SW009, SW010, SW011, SW014, SW015, SW018, SW019, SW022, SW024, SW025, SW027, SW029, SW030 to SW032 SW2 For all precincts: Maintain existing flood plain storage capacity potentially impacted by the project, to the requirements and satisfaction of the responsible authority Permanent and associated temporary construction works must not increase flood levels that result in an additional flood risk to the requirements and satisfaction of the responsible authority Ensure permanent and associated temporary works do not increase flow velocities that would potentially affect the stability of property, structures or assets, and/or result in erosion during operation or construction, to the requirements and satisfaction of the responsible authority Undertake modelling of the design of permanent and temporary works to demonstrate the resultant flood levels and risk profile to the satisfaction of the responsible authority. All Construction/ Operation SW004, SW006, SW008, SW012, SW013, SW016, SW017, SW020, SW021, SW023, SW026, SW028, SW033, SW034 Also refer to the following Environmental Performance Requirements for ‘Surface Water’: AE6 Aquatic ecology and health
MMRP_Chapter-23_Environmental-Management-Framework.docx