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 5 Drawn ZW Checked MP Drawing No. ESCP-TSF3-005-01 Sheet No. 11 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. Construction Methodology Construction of Permanent Uphill Clean Water Diversion Drain. Section 1- Progressively working up towards SRPTSF3-05. Dirty water runoff diverted to SRP-TSF3-03 for treatment. As the permanent diversion drain is constructed it will be progressively stabilised. Section 2 and 3 – refer to ESCP-TSF3-005-02. Collection Pond commissioned and placement of PAF allowable. KEY Erosion and Sediment Control Clean Water Diversion Dirty Water Diversion Culvert Silt Fence Sediment Retention Pond Placement of PAF in areas where runoff reports to Collection Ponds. SRP-TSF3-05 SRP-TSF3-08 Catchment area: 1ha Total volume: 200m3 Dead storage: 60m3 Live storage: 140m3 SRP-TSF3-06 Catchment area: 5.0ha Total volume: 1,500m3 Dead storage: 450m3 Live storage: 1,050m3 SRP-TSF3-03 SRP-TSF3-09 Catchment area: 1ha Total volume: 200m3 Dead storage: 60m3 Live storage: 140m3 Section 1 - First section of permanent clean water diversion (up to SRPTSF3-05). As it is constructed the diversion drain will divert runoff to the SRP at the bottom of the diversion. Section 3 Section 2 SRP-TSF3-02 Section 1 Section 2
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