22 nd April 2015 Agenda Topic/Owner Information 1 Last Meeting - - PowerPoint PPT Presentation

Hikurangi Swamp Working Group Meeting

22nd April 2015

Agenda

Topic/Owner Information 1 Last Meeting Minutes 2 Operations/Maintenance 1. Monthly Overview from Hydrotech 2. Pump Availability 3. Power Usage 4. Pump Operation 5. Buildings Maintenance 6. Concrete Degradation 3 Finances Hydrotech Report Review OPEX 2014/15 4 14-15 Drain Clearing 1. 2014/15 Drain Clearing Review 2. 2014/15 Drain Clearing Lessons Learnt 3. 2015/16 Drain Clearing 4. 2015/16 Drain Clearing Trials 5 2014/15 Capex Stopbank Adjustments Progress 6 Berm Land Flow Restrictions Licence s 7 Environmental Unusual Fauna Ox-bow Restoration 8 Legal July 2014 Stopbank Cuts 9 Economic Economic Analysis 10 Future Objectives Short / Medium / Long Term Objectives 11 AOB (Living Water)

Please note, all costs in this presentation are indicative only

Operations and Maintenance – Overview

• f HydroTech’s February Report
• Weather was settled and dry, with occasional

rainfall

• Drain clearing continued in the Otonga Pocket

and willows cleared from the Mangawhero stream in Mountain Pocket

• Low flows allowed structural repairs to be

undertaken (details later)

Operations and Maintenance – Overview

• f HydroTech’s March Report
• Settled weather continued for the

month, with exception of Cyclone Pam which only produced a couple of inches of rain

• Opportunity taken to swamp out

Pump E at Okarika which had leaking seals and low electrical test

Operations/Maintenance - Pump Availability

• ver February and March

Station

~1.1 m3/s Pumps ~ 4.1 m3/s Pumps

Station Capacity (m3/s) A B C D E Otonga Flygt (17%) Flygt (17%) Pleuger (65%) 6.3 Te Mata Pleuger (17%) Flygt (17%) KSB (65%) 6.3 Mountain Pleuger (50%) KSB (50%) 2.2 Tanekaha McKewen (50%) Pleuger (50%) 2.2 Junction Pleuger (100%) 1.1 Ngararatunua Pleuger (11%) Pleuger (11%) Pleuger (39%) Pleuger (39%) 10.4 Okarika Pleuger (10%) Pleuger (10%) Pleuger (10%) Pleuger (35%) Pleuger (35%) 11.5

*1 Pump E at Ngararatunua was temporarily out of service in February when concrete

repairs were undertaken

*2 Pump E at Okarika swapped out for the spare as it had leaking seals and low test. Can be

used as a spare if required but intention is to keep out and repair next financial year The scheme now has one large and one small Pleuger available as spares in local storage in event of a Pleuger Pump failure, (propeller is on order)

Operations/Maintenance - Power Usage

Swamp Power Cost 2012/13 2013/14 2014/15 August 730 89095 September 30404 5083 26787 October 30179 16498 47467 November 15947 10183 1901 December 10773 1217 621 January 781 243 23535 February 2374 3479 551 March 2293 833

• 209

April 18 246 May 331 1412 June 997 2503 July 25065 1178 10000 20000 30000 40000 50000 60000 70000 80000 90000 100000 Swamp Power Cost 2012/13 Swamp Power Cost 2013/14 Swamp Power Cost 2014/15

HydroTech February Report Review – Pump Hours Run

Pump Pocket

Junction Te Mata Tanekaha Mountain Otonga Ngararatunua Okarika

A B C D E

HydroTech March Report Review – Pump Hours Run

Pump Pocket

Junction Te Mata Tanekaha Mountain Otonga Ngararatunua Okarika

A B C D E

Buildings Maintenance

• All pump stations have now been

completed

• Cost within $200 of original $9180

budgetted (couple minor additions)

Buildings Maintenance – Okarika PS

Buildings Maintenance – Mountain PS

Buildings Maintenance – Otonga PS

Concrete Degradation – Otonga PS

HydroTech February Report Review - Finances

Inspection Maintenance Environmental Flood Attendance Drain Clearing

$3,297.78 $3,208.66

• $24,383.08

Inspections Includes Quarterly Inspection (part of) Maintenance Concrete repairs in Ngararatanua Pump E Bay Cable replacement Spill sensor alarming, attend and resolve Replaced failed walkway to floodgate Replaced failed winch Drain Clearing Willows and pine from Mangawhero Stream Judd, Lupton Point, Wilkinson Outlet, April Properties and Willsonville Quarry drains cleared

HydroTech March Report Review - Finances

Inspection Maintenance Environmental Flood Attendance Drain Clearing

$2,709.25 $12,742.47 $546.96 $50.74 $5,300.74

Inspection Includes quarterly inspection in addition to the monthly inspection (part of) Maintenance Remove pump E at Okarika (leaking seals & low test)and install spare Concrete repair on pump E bay at Ngararatanua Replacement fuses and Glycol for pumps Environmental Switch off pumps during eel migration Bank stability assessment of Mangahahuru Stream for native planting Re-instate eel monitoring equipment Drain Clearing Pine Removal on Mangawhero Stream

Finances – OPEX 2014/15

These figures are presently being worked on and are preliminary, exclude insurance, overheads etc & include additional lines with minor spends. Big hits were 2013/14 power bill and pump rewinds coming across ($348k was spent) Account Description 2014/15 Actuals YTD 2014/15 Budget Full Year 2014/15 Forecast Miscellaneous Income Received (5,325) (5,325) Insurance Recoveries (7,934) (7,934) Other Rentals Received (26,270) (41,555) (53,593) General Miscellaneous 287 287 Telephone and Other Communication 2,380 3,287 Electricity Supply Costs 189,749 180,000 228,583 Water Rights Paid NRC Consent 4,042 2,000 7,499 Payments to External Contractors 169,285 190,000 222,285 Legal Fees 4,395 10,000 4,697 Engineering Fees 11,968 30,000 16,101 Other Professional Fees 3,640 5,000 4,320 Plant & Equip Maintenance non Contract 81,845 100,000 108,159 Total 428,309 475,445 528,316

2014/15 Drain Clearing Review - Requested

• $70,000 was budgeted for drain clearing for 2014/15
• Drain clearing was to be undertaken between November to

February

• 21km of excavator cleaning was requested
• 12km of spraying was requested
• $5k allocated to willow removal on Mangawhero Stream
• $10k allocated to soda rapids removal on Maruaru Stream

2014/15 Drain Clearing Review - Achieved

• $66,199.18 was spent on drain clearing in 2014/15
• Drain clearing was started in November and completed by

February

• 21km of excavator cleaning was completed (although minor

changes were made between which drains were cleared)

• 12km of spraying was completed (approx. 1km was re-sprayed)
• $11k was spent on pine & willow removal on Mangawhero Stream
• NRC confirmed that a separate resource consent is required to

remove the soda rapids removal on Maruaru Stream, do we want to proceed?

2014/15 Drain Clearing Lessons Learnt

• All land owners to be informed if work is to be

undertaken on their drains

• The deadline for which drains to be cleared can be

moved back from July to mid-October (how do we ensure requests?)

• Was frequency of communication about drain

clearing progress useful?

• Was approach in way minor changes were made

also useful?

2015/16 Drain Clearing

• Drain clearing budget as based on Drainage Maintenance

income is $96k, as well as $4k carryover for Maruaru Stream

• Proposed split of $100k;
• $20k Maruaru Stream rapids removal*1
• $55k excavator drain clearing (24km, up 3km on 2014/15)
• $2.5k spraying (12km, same as 2014/15)
• $22.5k “other”
• Possible use for “other”;
• Reduce scheme’s debt
• Willow removal (at bottom of swamp & SW Otonga PS)
• Bermland flow restrictions removal
• Excavate main channel
• Trials (two stage channels, native planting)

*1 Cost increased based on better quantification of volumes

to be removed, consent application, as-builts etc.

2015/16 Drain Clearing Trials – Two Stage Channels

2015/16 Drain Clearing Trials – Native Planting

2014/15 Capex - Stopbank Adjustments

• All structural work on stopbanks have been completed
• Grass & hydro-seeding being undertaken last/this

week

• Inside of bank built up where

eroded on riverside of Tanekaha

• Removed paddock stones

from the Tanekaha bank to ensure compaction

2014/15 Capex - Stopbank Adjustments

• Now stopbanks and spillways (completed previously)

are back to original design levels, monitoring of the 5 flood events can begin as per consent (if under 25-30 AFI, otherwise overtops stopbanks as well as spillways)

• Cattle to be kept off stopbanks until grass has taken

Pocket Length of Stopbank elevated (m’s) Ngararatanua 180 Mountain 1420 Okarika 1780 Tanekaha 1420 Junction 1060 Otonga 1760

2014/15 Capex - Stopbank Adjustments

• Only outstanding work

under the contract is the improvement of the access tracks to Mountain and Otonga Pump Stations

• Contractor being utilized

to undertake the tomo investigation / safety work at Okarkia Pump Station (not long term fix)

2014/15 Capex - Stopbank Adjustments – Okarika Pump Station Tomo Investigation Risk Assessment

• Only outstanding work

under the contract is the improvement of the access tracks to Mountain and Otonga Pump Stations

• Contractor being utilized

to undertake the tomo investigation / safety work at Okarkia Pump Station (not long term fix)

Berm Land – Flow Restrictions

• The old road formation was found to have no useful

material left (few exploratory pits undertaken)

• Okarika;

– The upper perpendicular stopbank has been removed – The lower perpendicular stopbank will be removed

• ver next couple of weeks

Berm Land – Flow Restrictions

• The suggested overland flow path was not able to be

economically incorporated as no material extraction was required within the vicinity

2014/15 Capex - Stopbank Adjustments – Financial Summary

• Capital expenditure available in the Annual Plan was

$357k

• Original accepted tender amount was $263,695.21
• Spend to date is $183,909
• Costs to come;

– Grass seeding - $15,000 – Okarika Perpendicular stopbank - $1,400 – Okarika Pump Station Investigation and safety work - $20,000 – Jordan Valley Road to Otonga Stopbank access road - $17,000

• Forecasting a total spend of $237,295 (i.e. approx.

$26,000 under spend on the tender)

Berm Land – Licences

• A number of berm land licenses have still not been

returned or have finances outstanding

Environmental - Unusual Fauna Spotted (Ngararatanua)

• NRC informed, suggested if we could catch we could

take to SPCA – no proposed action.

Environmental – Ox-bow Restoration

• Work has begun on second ox-bow restoration;

– Area been fenced off – Area has been sprayed and willows treated – Bund has been constructed

Environmental – Ox-bow Restoration

• Presently in liaison with Land Care Trust to undertake

some ‘infill’ planting on the first ox-bow

• Land Care Trust are providing 3,000 native Tea Tree,

Flax & Cabbage Trees for second ox-bow

• Planting on second ox-bow to be 11th – 15th May,

contractor and weather dependant

Stopbank Cuts

Stopbank Cuts

• Junction Stopbank Cut, three offences under RMA;

– $22.5k fine for diverting flood waters – $22.5k for releasing sediment – $22.5k for breaching an abatement notice

• Te Mata Stopbank Cut, two offences under RMA;

– $22.5k fine for diverting flood waters – $22.5k for releasing sediment

• Invoices have been sent seeking recovery of costs

for the stopbank reinstatements

Economic Analysis

• What do floods cost?
• Consultant to collect that information

– AgFirst (Phil Juno or Bob Cathcart)\

• Looking at funding options with NRC

and Fonterra

Short Term Objectives (Page 1 of 2)

• To meet the terms of the resource consent ($350k for stop bank

levelling) – Completed, flood monitoring can now begin

• Survey the berm land to understand the height variation/

restrictions down through the swamp – 3 perpendicular stopbanks and overland flow path identified, dependant on stopbank project

• Address the issue with the large trees/ significant undergrowth in

the berm land to the immediate SW of Otonga PS – deferred to next financial year, included as drain clearing request(?)

• Assess the restrictive influence of the old road formation below the

Jordan Valley Bridge – material no good for stopbanks, to be included as next years drain clearing request?

• Assess the condition and understand the possibility of clearing

restrictions on the Wairua River downstream of the Matarua Bridge – completed

Short Term Objectives (Page 2 of 2)

• Assess the channel profile (presently pools and riffles)

between the Jordan valley Bridge and Matarau Bridge in the Wairua River - awaiting confirmation of LTP

• Consider the possibility of trading off ox-bow within the

berm land with ox-bows on private land on the pocket- side of the stopbanks to aid smooth flow through the scheme whilst maintaining the environmental balance.

• Lock down the date at which the scheme becomes

debt free – awaiting confirmation of LTP

• Investigate external sources of funding for

environmental improvements within the pockets

Medium Term Objectives (1 – 5 years)

• Spillway monitoring and spillway / stop bank alterations (if

required) – completed & assess data from next 5 compatible flood events

• Investigate if Junction pocket does indeed receive additional
• verflow over the stopbanks due to the speed at which the

flows come down from the upper catchments – assess data from next 5 compatible flood events

• To get the scheme running as originally intended
• Clear vegetation in river channel / berm land – deferred

to next financial year, included as drain clearing request(?)

• Clear willows downstream of scheme (i.e. below

Matarau Road Bridge) – deferred to next financial year, included as drain clearing request(?)

Long Term Objectives (5+ years)

• Feasibility Study – Economic Analysis?
• Possible change in land-use
• Increase flooding protection (e.g. higher stopbanks,

larger floodgates, sacrificial areas)

• Hydrologists interpretation of future hydrographs
• Any other proposals?

AOB

• Living Water