B-2 – Area 2 - Assessment of Environmental Effects 29 3.2.1 Preparatory Works Preparatory works at the Willows SFA will include stripping of topsoil from footprint areas and stockpiling it for use in bunding and site rehabilitation. Figure 17 illustrates the approximate location of the topsoil stockpile. This will cover an area of approximately 2 - 3 ha and will be hydroseeded to prevent erosion and enable dry stock grazing during mining operations. Erosion and sediment control measures will be employed in accordance with section 3.2.4. 3.2.2 Site Access Two vehicle crossings will be constructed from Willows Road to the Willows SFA. The first crossing will provide access to the main office/change house facilities and workshop at the Willows SFA. A haul road constructed of rock base with crushed rock surfacing will connect the portal, rock storage pads, workshop and vehicle wash facility. This road will be constructed in conjunction with the tunnel and will incorporate spoon drains to collect WRS contact water from upper locations as well as diverting non-contact water around the WRS. A second, road will be established from Willows Road to service the surface high explosives magazine. The total length of on-site roads will be approximately 2.5 km. 3.2.3 Noise Bunds Three large noise bunds will be established at the Willows SFA. The location of the proposed noise bunds is shown in Figure 17. Approximately 3 m in height, the noise bunds will mitigate some of the noise effects generated from the service workshop and other activities within the SFA. The noise bunds will be established early in the construction phase and will be in place before the tunnelling phase of the development works commences. 3.2.4 Erosion and Sediment Control Southern Skies (2022) describe the erosion and sediment control measures that will be implemented for these works. A copy of Southern Skies (2022) is provided in Part H of these application documents. Southern Skies (2022) includes: An Erosion and Sediment Control Assessment Report (“ESCAR”) which provides:
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