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

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NZ Transport Agency and Tauranga City Council Mangatawa Drain Flood Bypass and TEM Stormwater AEE 5.4 State Highway 2...................................................................................................... 45 5.5 Social Environment ................................................................................................. 45 5.6 Cultural .................................................................................................................. 45 5.7 Archaeological........................................................................................................ 46 5.7.1 Summary of Results ................................................................................ 46 5.7.2 Archaeological Significance ..................................................................... 46 5.7.3 General Considerations ........................................................................... 46 5.8 Topography............................................................................................................ 47 5.9 Geology.................................................................................................................. 47 5.10 Ground Conditions ................................................................................................. 47 5.11 Contaminated Land................................................................................................. 47 5.12 Land Drainage ........................................................................................................ 48 5.12.1 Catchments............................................................................................. 48 5.12.2 Catchment Hydrology.............................................................................. 49 5.13 Ecology................................................................................................................... 50 5.13.1 Mangatawa Drain .................................................................................... 50 5.13.2 Maranui Swale......................................................................................... 51 5.13.3 Stormwater Treatment Wetland ............................................................... 52 5.13.4 Special Ecological Site - Salt-marsh and Mangrove (SES) .......................... 55 5.13.5 Rangataua Bay......................................................................................... 58 5.13.6 Conclusion.............................................................................................. 59 6. Alternatives Considered ....................................................................................................... 63 6.1 Further Engineering Options Considered................................................................. 64 6.1.1 Outlet and Discharge Points .................................................................... 65 7. Description of the Proposal ..................................................................................................67 7.1 Mangatawa Flood Bypass Activities ......................................................................... 67 7.1.1 Increased Drain Storage .......................................................................... 67 7.1.2 Top Spill Bund......................................................................................... 67 7.1.3 Bruce Spill Stop Bank............................................................................... 67 7.1.4 Maintenance Work in Upper Mangatawa Drain ......................................... 68 7.1.5 Rail Bridge Embankment Stability ............................................................ 68 7.1.6 Flood Bypass from Maranui to Mangatawa ............................................... 69 7.1.7 Sandhurst Culvert ................................................................................... 69 7.1.8 Extension of Maranui Culverts ................................................................. 69 7.1.9 Maranui Swale Deepening........................................................................ 69 7.1.10 Lower Mangatawa Drain (from Mangatawa Lane to Tauranga Harbour)..... 70 7.1.11 Mangatawa Flood Bypass Flood Levels ..................................................... 70 Status: Final April 2009 Project Number: 3932036 NZ1-1552092-Mangatawa Drain Flood Bypass and TEM Stormwater AEE
NZ Transport Agency and Tauranga City Council Mangatawa Drain Flood Bypass and TEM Stormwater AEE 7.1.12 Stormwater Treatment Wetland ............................................................... 71 7.2 TEM Roadway Stormwater ....................................................................................... 73 7.2.1 TEM Stormwater Management Philosophy................................................ 73 7.2.2 Swales..................................................................................................... 73 8. Consultation ........................................................................................................................ 75 8.1 Background – Tauranga Eastern Motorway .............................................................. 75 8.1.1 Consultation Objectives .......................................................................... 75 8.2 Mangatawa Public Consultation............................................................................... 75 8.3 Directly Affected Landowners.................................................................................. 76 8.4 Individual Landowners ............................................................................................ 76 8.4.1 MPBI........................................................................................................ 76 8.5 Tangata Whenua ..................................................................................................... 78 8.5.1 TEM Project Hui....................................................................................... 78 8.5.2 Mangatawa Floodway Application Hui...................................................... 79 8.5.3 Tauranga Eastern Motorway Tangata Whenua Advisory Group ................. 81 9. Assessment of Environmental Effects ................................................................................... 82 9.1 Stormwater Management ........................................................................................ 82 9.1.1 Water Quantity ........................................................................................ 82 9.1.2 Water Quality .......................................................................................... 83 9.1.3 Freshwater Ecology ................................................................................. 86 9.2 Earthworks ............................................................................................................. 89 9.2.1 Ecological Effects from Construction ....................................................... 89 9.2.2 Noise and Vibration................................................................................. 91 9.2.3 Dust........................................................................................................ 91 9.2.4 Archaeological Effects from Construction ................................................ 92 9.2.5 Hazardous Substances/Contamination/Probability of Risk ....................... 93 9.3 Assessment of Stormwater and Earthworks Cultural Aspects ................................... 93 10. Statutory Assessment........................................................................................................... 95 10.1 RMA 1991 .............................................................................................................. 95 10.2 Bay of Plenty Regional Policy Statement (RPS) .......................................................... 98 10.3 Operative Regional Water and Land Plan (RWLP) – 1 st December 2008.................... 100 10.4 Bay of Plenty Regional Air Plan .............................................................................. 102 10.5 Regional Coastal Environment Plan Coastal July 2003............................................ 102 10.6 Tauranga District Plan........................................................................................... 103 Status: Final April 2009 Project Number: 3932036 NZ1-1552092-Mangatawa Drain Flood Bypass and TEM Stormwater AEE
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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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The Maranui catchment area in the m
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Table 7 - 2% AEP Storm Event Top Sp
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These results include climate chang
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3.3 Maintenance Work in Mangatawa D
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stormwater from the Maranui catchme
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Appendix A Mangatawa Drain Layout P
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Appendix C Runoff Hydrographs
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Appendix E Proposed Lower Mangatawa
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APPENDIX 10 - Drawings 3932036 ck46
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APPENDIX 12 - Drawing 3932036 ck227
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Report Tauranga Eastern Motorway -
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1 Introduction This report describe
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embankment settlement rates, and th
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3.2 Construction Sequence The typic
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concrete contamination as well as s
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Pahse 1 consists of the western sec
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• Installation of Stage 2 decanti
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Appendix A Erosion and Sediment Con
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Activity Status Mangatawa Drain 1.1
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(b) Natural State (River) Water Qua
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6. Reclamation or drainage of the b
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APPENDIX 15 - Legal Descriptions of
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Path: P:\393\3932036\TGI\55_Project
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32 Harington Street PO Box 903, Tau
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32 Harington Street PO Box 903, Tau
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