Orewa Catchment Management Plan

The Orewa Catchment Management Plan provides an integrated approach to managing stormwater in Orewa.  The study area covers the eastern half of the principal Orewa River East catchment area which is currently utilised for medium density residential use, with a large central business and commercial area.  Further development is also planned within the area for high density residential use.

Historically this catchment area has suffered from flooding problems related to the relatively flat topography and it is this principle issue which the Council wishes to address.

The Orewa Catchment Management Plan outlines and incorporates the key issues and catchment objectives developed by the council. The report also assesses the effects on the environment of stormwater discharges, details stormwater treatment/flow, suitability of identified devices and strategies, flood control options and cost estimates.

Orewa Catchment Management Plan
Orewa Catchment Management Plan	(574k)
Figures
Figure 2-3 Catchment Location
Figure 2-4 Stormwater Catchments, Subcatchments and Receiving Environments
Figure 2-5 Stormwater Services (Sheets 1 and 2)
Figure 2-6 Orewa CBD Study Area Coastal Stormwater Outfalls
Figure 2-7 Coastal Protection Areas Adjacent to Catchment
Figure 2-8 Study Area Contour Elevation Plan
Figure 2-9 Land Use Zones and Policy Areas (Current and Future)
Figure 2-10 Proposed Future Development Scenario: Option 1 (Status Quo) - Suburban CBD
Figure 2-11 Proposed Future Development Scenario: Option 2 - Coastal Urban Village CBD
Figure 2-12 Proposed Future Development Scenario: Option 3 - Coastal Urban CBD
Figure 2-13 Land Use Zoning - Proposed District Plan Variation 101
Figure 2-14 Wastewater Services
Figure 2-15 Water Supply Services
Figure 2-16 Existing Stormwater Treatment Devices Locations
Figure 2-17 Stormwater Treatment Devices - Existing and Proposed Locations
Figure 3-4 Flooding Questionnaire Responses
Figure 3-5 2D Flood Relief Map (100 Year-24hour - 2.3m Tide Level)
Figure 3-6 Contaminant Loading Subcatchments
Figure 3-7 Contaminant Loading Copper
Figure 3-8 Contaminant Loading (Zinc)
Figures 3-9 Contaminant Loading Total Suspended Solids
Appendices
Appendix A - Model Details/Report	Hardcopy only
Appendix B - Stormwater Mitigation Measures - Figures Figures 1-11 Figures 12-24	(2.8m)  (2.6m)
Appendix C - Stormwater Flooding Mitigation Measures - Cost Estimates	(101k)
Appendix D - Stormwater Evaluation Matrix	(37k)
Appendix E - Sea Level Inundation Details	(984k)
Appendix F - Environmental Reports	Hardcopy only
Appendix G - Stormwater Projects Proposed Appendix G1 - Centreway Reserve Proposed Stormwater Upgrade Diagram Appendix G2 - Stormwater Wetland Landscape Concept Appendix G3 - Orewa Stormwater Upgrade Filter and Pipeline Layout Appendix G4 - Orewa Stormwater Scoping - Alice Avenue Catchment Upgrade	(951k)  (826k)  (858k)  (3.6m)
Appendix H - Relevant Consent Conditions	(22k)

Appendices

Please note: Appendix A (Model Details/Report) and  Appendix F (Environmental Reports)  are too large to be published online.  Please contact us for hard copies.

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