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Waipaoa River Flood Control Scheme Review

Waipaoa River Flood Control Scheme Review. Review. Technical Review Sept 2009 Steering Committee Oct 2009 Operations Committee Oct Council February 2010 Preliminary Feedback. Review. Existing Scheme ~ 70 Year Up to “Bola” Review includes Scheme 3A Floodways at Lovelock & Ormond loops

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Waipaoa River Flood Control Scheme Review

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  1. Waipaoa River Flood Control Scheme Review

  2. Review • Technical Review Sept 2009 • Steering Committee Oct 2009 • Operations Committee Oct • Council February 2010 • Preliminary Feedback

  3. Review • Existing Scheme ~ 70 Year • Up to “Bola” • Review includes • Scheme 3A • Floodways at Lovelock & Ormond loops • Extension to Te Karaka (15 year) • Relocation Mullooly Bend Stopbank

  4. Options • 100 Yr – Construct in 6 years • 100 Yr – Construct in 10 years • 150 Yr – Construct in 6 years • 150 Yr – Construct in 10 years • 200 Yr – Construct in 10 years • What Can be done for $1m /yr • What for max $300 / Hectare?

  5. Costs of Options

  6. Economic Benefit Assessment • Construction & Maintenance Economic Benefits/Losses Over Lifetime • Other District Economic Benefits/Losses Over Lifetime • Benefits/Losses relative to the Economic Risks • Overall Net Economic Benefit to District

  7. Economic Benefit AssessmentBenefit / Cost • 100 Year 5.3 • 150 Year 6.0 • 200 Year 6.9 • Does Not Address Affordability

  8. Existing Rating System • 60 Years Old • Soil Conservation & Rivers Control Act 1941 • Local Govt Rating Act 2002 • “Distribution of Benefits” • “Extent contribute to the need” • Changes in Land Use

  9. Proposed Rating System • Direct Benefit • 6 Categories • Indirect Benefit • 3 Categories • Contributors

  10. Proposed Rating – Direct Benefit • Review Existing Class/Land Use • Depth of Flooding • Duration of Flooding • Relative Economic Benefits

  11. Proposed Rating – Indirect Benefit • The large and more diverse economy that is sustained • Protection to Roads and other Transport Facilities • Protection of Essential Services • Protection and Enhancement of Services and Facilities used by the Wider Community.

  12. Proposed Rating Review - Contributors • Land within the Upper Catchment • Sediment and increased water runoff from the catchment • Natural process • Only where the land use has altered the natural runoff • MAF Assistance?

  13. Proposed Rating Review • Direct Benefit 65% • Indirect Benefit 20% • Contributors 15%

  14. Rating Impacts of Options

  15. Direct BeneficiariesLand Areas for Class (Existing) • 300 ha A class • 2500 ha B class • 500 ha of C class • 8000 ha of D class

  16. Example(Incls Capital & Maintenance)

  17. Example(Incls Capital & Maintenance)

  18. Example(Incls Capital & Maintenance)

  19. Where to? • Preliminary Meetings • Feedback • Report to Council • Council Decide on Preferred Option (or Not) for Consultation • Council Decide on Preferred Rating (or Not) for Consultation • Ten Year Plan 2012

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