Waipaoa river flood control scheme review
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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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Waipaoa river flood control scheme review

Waipaoa River Flood Control Scheme Review


Review

Review

  • Technical Review Sept 2009

  • Steering Committee Oct 2009

  • Operations Committee Oct

  • Council February 2010

  • Preliminary Feedback


Review1

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


Options

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?


Costs of options

Costs of Options


Economic benefit assessment

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


Economic benefit assessment benefit cost

Economic Benefit AssessmentBenefit / Cost

  • 100 Year5.3

  • 150 Year6.0

  • 200 Year6.9

    • Does Not Address Affordability


Existing rating system

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


Proposed rating system

Proposed Rating System

  • Direct Benefit

    • 6 Categories

  • Indirect Benefit

    • 3 Categories

  • Contributors


Proposed rating direct benefit

Proposed Rating – Direct Benefit

  • Review Existing Class/Land Use

  • Depth of Flooding

  • Duration of Flooding

  • Relative Economic Benefits


Proposed rating indirect benefit

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.


Proposed rating review contributors

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?


Proposed rating review

Proposed Rating Review

  • Direct Benefit65%

  • Indirect Benefit20%

  • Contributors15%


Rating impacts of options

Rating Impacts of Options


Direct beneficiaries land areas for class existing

Direct BeneficiariesLand Areas for Class (Existing)

  • 300 haA class

  • 2500 haB class

  • 500 ha ofC class

  • 8000 ha ofD class


Example incls capital maintenance

Example(Incls Capital & Maintenance)


Example incls capital maintenance1

Example(Incls Capital & Maintenance)


Example incls capital maintenance2

Example(Incls Capital & Maintenance)


Where to

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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