REV DATE REVISION DETAILS APPROVED 0 17.06.22 Draft for review. Project WAIHI NORTH Title Erosion and Sediment Control Plan Tailings Storage Facility 3 – Stage 2B Drawn ZW Checked MP Drawing No. ESCP-TSF3-002-02 Sheet No. 6 NOTES 1. All erosion and sediment controls will be installed and maintained in accordance with the Waikato Regional Council Technical Report 2009/02 ‘Erosion and Sediment Control Guidelines for Soil Disturbing Activities’ (TR2009/02). 2. Completed areas to be stabilised in accordance with TR2009/02. 3. All erosion and sediment control measures will be inspected weekly by the site foreman. 4. Site monitoring will be undertaken before and immediately after rain as well as during heavy rainfall events. Any required maintenance or improvements to control measures will be undertaken immediately. SRP-TSF3-07 Catchment area: 7.5ha Total volume: 2,250m3 Dead storage: 675m3 Live storage: 1,575m3 SRP to incorporate 2x manholes and outlet pipes and 5x T-bars. Construction Methodology Push clean water diversion to the east to allow further construction of the impoundment area. 5.6ha of area will be covered with a geomembrane liner. Runoff will continue to be diverted to the SRP as the embankment is constructed. KEY Erosion and Sediment Control Clean Water Diversion Dirty Water Diversion Culvert Silt Fence Sediment Retention Pond Clean water diversion directing upslope clean water catchment away from the area of earthworks. Geomembrane lined area – 5.6ha TSF3 embankment construction area – 1.12ha. Existing Collection Pond to be used until decommissioned.
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