REV DATE REVISION DETAILS APPROVED 0 03.02.22 Draft for review Project WAIHI NORTH Title Erosion & Sediment Control Plan Northern Rock Stack – Stage 2 Drawn ZW Checked MP Drawing No. ESCP-NRS-002-03 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 on a daily basis 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 – Remaining Section of Perimeter Access Road With the stream now flowing through the completed permanent uphill clean water diversion the final section of the perimeter access road can be constructed in a dry working environment. A stabilised dam will be installed downstream of the extent of works. Filling can then be completed to construct the final section of access road. Any dirty water will be pumped to the Collection Pond. Once the access road and external batters are stabilised then the stabilised dam will be removed. With the full extent of the access road constructed and the permanent uphill clean water diversion completed, the full extent of the NRS stockpile will be utilised. Extent of perimeter access road constructed once stream is flowing through the permanent uphill diversion drain. Stabilised dam installed at downstream extent of works and then filling can be completed. All dirty water will be pumped to the collection pond. Stream flowing through completed permanent uphill clean water diversion. Stabilised dam installed below the extent of earthworks. KEY Erosion and Sediment Control Clean Water Diversion Dirty Water Diversion Culvert Silt Fence Sediment Retention Pond
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