REV DATE REVISION DETAILS APPROVED 0 17.06.22 Draft for review. Project WAIHI NORTH Title Erosion & Sediment Control Plan Gladstone Open Pit – Year 1 Drawn ZW Checked MP Drawing No. ESCP-GOP-001-01 Sheet No. 1 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. Gladstone Pit Northern stockpile SRP-GOP-02 Catchment area: 1.2ha Total volume: 240m3 Dead storage: 72m3 Live storage: 168m3 Winner Hill Area: 1.3ha Year 1 earthworks will involve the excavation of the hill to create a pit. Excavation will progress in an east to west direction ensuring that runoff will fall to SRP-GOP-01. Gladstone Portal Earthworks to create the new Gladstone Portal. Final earthworks staging details and proposed ESC details TBC. Gladstone Hill Area: 5.5ha Year 1 earthworks will involve the excavation of the hill to create a pit. Excavation will ensure that runoff will fall to SRP-GOP-01. SRP-GOP-01 Catchment area: 7.0ha Total volume: 2,100m3 Dead storage: 630m3 Live storage: 1470m3 KEY Erosion and Sediment Control Clean Water Diversion Dirty Water Diversion Culvert Silt Fence Sediment Retention Pond Decanting Earth Bund
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