2. Mangatawa catchment consents for earthworks, storm water ...

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the public road it will be removed by the Contractor using appropriate methods (e.g. sweeper/sucker truck). 4.2.7 Dust suppression A dust management plan will be developed by the Contractor prior to the start of works and shall include details of the volume of water that is likely to be required, number of watering trucks required and the location and number of wheel washing facilities. During the dryer summer months dust control measures will be of high priority to avoid nuisance affects. In accordance with EBOP guidelines water should be applied at a rate of at lest 5mm/day (50m 3 /hectare) during dry periods. It is highly likely that water for use as a dust suppressant will be sourced from a municipal reticulated water supply rather than from on-site storage. In this instance written confirmation will be required from the territorial authority for the use of municipal water. 4.3 Erosion and Sediment Control implementation Sequence The anticipated implementation sequence for the erosion and sediment controls is as follows: Mangatawa Drain • Construction of perimeter controls such as clean water diversions for works; • Installation of decanting earth bund; • Installation of Kairua Road controls; • Drain and storage area earthworks; • Stabilise completed areas as soon as practicable • Remove decanting earth bund. Rail Bridge Embankment Stability • Construction of perimeter controls such as dams and clean water diversions for works; • Embankment excavation; • Gabion basket and Reno Mattress installation; • Rail Bridge works; • Fill corners; • Progressively stabilise completed areas as soon as practicable. Culvert Extension • Construction of clean water diversions; • Pipe the existing drains; • Install clean water diversions around outlet construction; • Progressively stabilise completed areas as soon as practicable. Lower Mangatawa Drain • Construction of perimeter controls such as silt fences and runoff diversions for Stage 1 works; • Installation of Stage 1 decanting earth bund; • Stage 1 earthworks; • Stabilise completed Stage 1 areas as soon as practicable; • Construction of perimeter controls such as silt fences and runoff diversions for Stage 2 works; Beca // 1 April 2009 // Page 10 3932036 // NZ1-1453076-10 0.10
• Installation of Stage 2 decanting earth bund; • Stage 2 earthworks; • Progressively stabilise completed areas as soon as practicable. Stormwater Wetland • Construction of perimeter controls such as silt fences; • Stage 1 earthworks; • Stage 2 earthworks; • Construction of dam weir; • Diversion of clean water entering wetland through the new Stage 2 channels; • Stage 3 earthworks; • Construction of outlet; • Progressively stabilise completed areas as soon as practicable; • Construction of perimeter controls such as silt fences and bund in Phase 2; • Phase 2 earthworks; • Open Phase 2 to Phase 1. 5 Monitoring and Maintenance Erosion and sediment control measures will be installed, monitored and maintained throughout the works until the site is stabilised. The table below outlines inspection and maintenance requirements for erosion and sediment controls that are to be implemented in this ESCP. Control Type Inspection and Maintenance Requirements Frequency Silt fence • Check that silt fences are toed in correctly. • Check for tears and other damage. • Any areas of collapse, decomposition or ineffectiveness are to be replaced immediately. • Remove silt build ups when bulges develop or when deposition reaches 50% of the silt fence height. Diversion bunds and channels Sediment Retention Pond Decanting Earth Bund • Ensure they are in the correct place (clean water diverting flows away from the work area and sedimentladen flows directed to sediment treatment devices). • Inspect for signs of scouring or collapse and repair immediately if required. • Remove any material that may have accumulated. • General inspection • Clean out sediment build up in forebay • Check outlet for blockages • Check level spreader • Check discharge points for scour • Check that outlet is not blocked • Remove built up sediment from around base Daily Daily As required As required Daily Daily As required Weekly As required Weekly Weekly Weekly Daily As required Regularly and Beca // 1 April 2009 // Page 11 3932036 // NZ1-1453076-10 0.10
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Mangatawa Drain Flood Bypass and TE
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APPENDIX 1 - Drawing 3932036 ck301R
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APPENDIX 3 - Drawing 3932036 ck119
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APPENDIX 5 - Bioresearches Report:
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APPENDIX 7 - Archaeological Assessm
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ARCHAEOLOGY B.O.P. HERITAGE CONSULT
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2 INTRODUCTION Project Background T
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4 ARCHAEOLOGICAL LANDSCAPE Previous
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6 U14/1708 & 1709 Figure 3. Cadastr
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8 Figure 6. Part ML 8133 showing Pt
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10 Hungahunga & Toroa A further ton
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12 APRIL 2008 ARCHAEOLOGICAL SURVEY
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14 Historic Places Act In addition
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APPENDIX 8 - Hydraulic Modelling: M
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Hydraulic Modelling: Mangatawa Drai
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undertake investigations into the d
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Discharge to Papamoa Beach To disch
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• Riparian planting adjacent to t
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2.2 Hydrological Assessment 2.2.1 C
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Page 301 and 302: APPENDIX 15 - Legal Descriptions of
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Page 311 and 312: 32 Harington Street PO Box 903, Tau
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