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Waipaoa River Flood Control Scheme Review

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Review

• Technical Review Sept 2009

• Steering Committee Oct 2009

• Operations Committee Oct

• Council February 2010

• Preliminary Feedback

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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

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5

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?

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Costs of Options

Upgrade Option Cost Total Annual Required(20 Year Loan)

100 Year (3A)(6 years)

$16.9m $1,868,000

100 Year(3A)(10 years)

$16.9m $1,460,000

150 Year (3A)(6 years)

$24.3m $2,655,000

200 Year(3A)(6 years)

$29.2m $3,065,000

<100 Year(3A)Narrower berms

$12.6m $1,000,000

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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

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Economic Benefit AssessmentBenefit / Cost

• 100 Year 5.3

• 150 Year 6.0

• 200 Year 6.9

– Does Not Address Affordability

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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

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Proposed Rating System

• Direct Benefit– 6 Categories

• Indirect Benefit– 3 Categories

• Contributors

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Proposed Rating – Direct Benefit

• Review Existing Class/Land Use

• Depth of Flooding

• Duration of Flooding

• Relative Economic Benefits

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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.

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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?

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Proposed Rating Review

• Direct Benefit 65%

• Indirect Benefit 20%

• Contributors 15%

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Rating Impacts of Options

Upgrade Option

Cost Total Annual

Direct65%

Indirect20%

Contributors15%

100 Year (3A)(6 years)

$16.9m $1,868,000 $1,214,200 $373,600 $280,200

100 Year(3A)(10 years)

$16.9m $1,460,000 $949,000 $292,000 $219,000

150 Year (3A)(6 years)

$24.3m $2,655,000 $1,725,750 $531,000 $398,250

200 Year(3A)(6 years)

$29.2m $3,065,000 $1,992,250 $613,000 $459,750

<100 Year (3A) Narrow Berm

$12.6m $1,000,000 $650,000 $200,000 $150,000

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Direct BeneficiariesLand Areas for Class (Existing)

• 300 ha A class

• 2500 ha B class

• 500 ha of C class

• 8000 ha of D class

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ProtectionLevel(Years)

Direct(Class D)

Indirect Contributor

Per $100k (CV) or Per Hectare PerProperty

Per Hectare

<100($1m per yr)

$39 $22 $13.90 $1.07

100 $66 $36.50 $23.50 $1.80

150 $94 $51.50 $33.13 $2.54

200 $120 $66 $42.61 $3.27

Example(Incls Capital & Maintenance)

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ProtectionLevel(Years)

Direct(Class B)

Indirect Contributor

Per $100k (CV) or Per Hectare PerProperty

Per Hectare

<100($1m per yr)

$134 $73 $13.90 $1.07

100 $225 $124 $23.50 $1.80

150 $318 $175 $33.13 $2.54

200 $409 $225 $42.61 $3.27

Example(Incls Capital & Maintenance)

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ProtectionLevel(Years)

Direct(Class A)

Indirect Contributor

Per $100k (CV) or Per Hectare PerProperty

Per Hectare

<100($1m per yr)

$204 $112 $13.90 $1.07

100 $345 $190 $23.50 $1.80

150 $486 $268 $33.13 $2.54

200 $626 $344 $42.61 $3.27

Example(Incls Capital & Maintenance)

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WAIPAOA SCHEME PEAK RATES 10yr works - $12.6 million - less than 100 yr Scheme - $ 1 million Rate requiredCHANGES TO LINTON COST ETC

LESS CONTRIBUTOR

LESS INDIRECT

TOTAL REQUIRED

15% 20% 09/10

Per $100,000

CVPer hectare

Capital ValuePoverty Bay Flats - existing A W1 20,909,847 100.00% 318,231,243 1,000,000 -150,000 -200,000 650,000 204$ 112$ Poverty Bay Flats - existing B W2 152,966,102 65.38% 134$ 73$ Poverty Bay Flats - existing C W3 314,823,105 38.46% 79$ 43$ Poverty Bay Flats - existing D W4 180,805,755 19.23% 39$ 22$ Poverty Bay Flats - existing E W5 536,836,364 7.69% 16$ 9$ Poverty Bay Flats - existing F W6 10,000,000 1.54% 3$ 2$

Area (ha.)Contributor CH 109,000 109,000 100% 140,800 251,400 251,400 2.83$ Per Hectare

CM 70,000 70,000 45% 1.27$ Per HectareCL 1,500 1,500 20% 0.57$ Per Hectare

No. of propertiesIndirect - Gisborne City R & U NG 12,819 12,819 100% 14,387 335,200 335,200 36.91$ Per Property Indirect - inner Zone - PB Flats NI 1,193 1,193 100% 36.91$ Per Property DRA3 - cummuter distance NC 1,500 1,500 25% 9.23$ Per Property

Note the above categories still include elements of

150-yr 3A $24.3TOTAL RATE

RERQUIRED

UAC - Number or properties

RELA

TIVE

PR

OPO

RTIO

NS

EQUIVALENT CV

AREA UAC

RATING CATEGORY NAME

CODE RATING BASIS AREA

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LESS CONTRIBUTOR

LESS INDIRECT

TOTAL REQUIRED

15% 20% 09/10

Per $100,000

CVPer hectare

Capital Value

Poverty Bay Flats - existing A W1 20,909,847 100.00% 318,231,243 2,655,000 -398,250 -531,000 1,725,750 542$ 298$

Poverty Bay Flats - existing B W2 152,966,102 65.38% 355$ 195$

Poverty Bay Flats - existing C W3 314,823,105 38.46% 209$ 115$

Poverty Bay Flats - existing D W4 180,805,755 19.23% 104$ 57$

Poverty Bay Flats - existing E W5 536,836,364 7.69% 42$ 23$

Poverty Bay Flats - existing F W6 10,000,000 1.54% 8$ 5$

Area (ha.)

Contributor CH 109,000 109,000 100% 140,800 251,400 251,400 2.83$ Per Hectare

CM 70,000 70,000 45% 1.27$ Per Hectare

CL 1,500 1,500 20% 0.57$ Per Hectare

No. of properties

Indirect - Gisborne City R & U NG 12,819 12,819 100% 14,387 335,200 335,200 36.91$ Per Property

Indirect - inner Zone - PB Flats NI 1,193 1,193 100% 36.91$ Per Property

DRA3 - cummuter distance NC 1,500 1,500 25% 9.23$ Per Property

RE

LAT

IVE

P

RO

PO

RT

ION

S

TOTAL RATE

RERQUIRED

150-yr 3A $24.3

EQUIVALENT CV

AREA UAC

WAIPAOA SCHEME PEAK RATES - 150yr- 3A - 6yr works $24.3 million - $300 per hectare

Note the above categories still include elements of Gisborne City direct benefit

RATING CATEGORY NAME AREAUAC -

Number or propertiesC

OD

E

RATING BASIS

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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