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	(2.9mb)
Figure 2-4 Stormwater Catchments, Subcatchments and Receiving Environments	(351kb)
Figure 2-5 Stormwater Services (Sheets 1 and 2)	(439kb)
Figure 2-6 Orewa CBD Study Area Coastal Stormwater Outfalls	(283kb)
Figure 2-7 Coastal Protection Areas Adjacent to Catchment	(2.92mb)
Figure 2-8 Study Area Contour Elevation Plan	(662kb)
Figure 2-9 Land Use Zones and Policy Areas (Current and Future)	(220kb)
Figure 2-10 Proposed Future Development Scenario: Option 1 (Status Quo) - Suburban CBD	(243kb)
Figure 2-11 Proposed Future Development Scenario: Option 2 - Coastal Urban Village CBD	(245kb)
Figure 2-12 Proposed Future Development Scenario: Option 3 - Coastal Urban CBD	(245kb)
Figure 2-13 Land Use Zoning - Proposed District Plan Variation 101	(613kb)
Figure 2-14 Wastewater Services	(633kb)
Figure 2-15 Water Supply Services	(562kb)
Figure 2-16 Existing Stormwater Treatment Devices Locations	(425kb)
Figure 2-17 Stormwater Treatment Devices - Existing and Proposed Locations	(932kb)
Figure 3-4 Flooding Questionnaire Responses	(1.6mb)
Figure 3-5 2D Flood Relief Map (100 Year-24hour - 2.3m Tide Level)	(174kb)
Figure 3-6 Contaminant Loading Subcatchments	(274kb)
Figure 3-7 Contaminant Loading Copper	(246kb)
Figure 3-8 Contaminant Loading (Zinc)	(254kb)
Figures 3-9 Contaminant Loading Total Suspended Solids	(245kb)
Appendices
Appendix A - Model Details/Report	Hardcopy only
Appendix B - Stormwater Mitigation Measures - Figures Figures 1-11 Figures 12-24	(2.8mb)  (2.6mb)
Appendix C - Stormwater Flooding Mitigation Measures - Cost Estimates	(101kb)
Appendix D - Stormwater Evaluation Matrix	(37kb)
Appendix E - Sea Level Inundation Details	(984kb)
Appendix F - Environmental Reports	Hardcopy only
Appendix G1 - Centreway Reserve Proposed Stormwater Upgrade Diagram	(951kb)
Appendix G2 - Stormwater Wetland Landscape Concept	(826kb)
Appendix G3 - Orewa Stormwater Upgrade Filter and Pipeline Layout	(858kb)
Appendix G4 - Orewa Stormwater Scoping - Alice Avenue Catchment Upgrade	(3.6mb)
Appendix H - Relevant Consent Conditions	(22kb)

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.

Related Links