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

Hikurangi Swamp Working Group Meeting 22 nd 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 2014/15 Capex Stopbank Adjustments Progress 5 6 Berm Land Flow Restrictions Licence s Environmental Unusual Fauna 7 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 of 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 of 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 over February and March ~1.1 m 3 /s Pumps ~ 4.1 m 3 /s Pumps Station Station Capacity A B C D E (m 3 /s) 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 100000 90000 Swamp Power Cost 2012/13 2013/14 2014/15 80000 August 730 0 89095 September 30404 5083 26787 October 30179 16498 47467 70000 November 15947 10183 1901 December 10773 1217 621 January 781 243 23535 60000 February 2374 3479 551 March 2293 833 -209 April 18 246 50000 May 331 1412 June 997 2503 July 25065 1178 40000 30000 Swamp Power Cost 20000 2012/13 Swamp Power Cost 2013/14 10000 Swamp Power Cost 2014/15 0

HydroTech February Report Review – Pump Hours Run Pocket Pump Junction Te Mata Tanekaha Mountain Otonga Ngararatunua Okarika A 0 0 0 0 0 0 0 B 0 0 0 0 0 0 C 0 D 0 0 0 0 E 0 0

HydroTech March Report Review – Pump Hours Run Pocket Pump Junction Te Mata Tanekaha Mountain Otonga Ngararatunua Okarika A 0 0 0 0 0 0 0 B 0 0 0 0 0 0 C 0 D 0 0 0 0 E 0 0

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 Flood Inspection Maintenance Environmental 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 Flood Inspection Maintenance Environmental 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 Account Description 2014/15 Actuals YTD 2014/15 Budget Full Year 2014/15 Forecast Miscellaneous Income Received (5,325) 0 (5,325) Insurance Recoveries (7,934) 0 (7,934) Other Rentals Received (26,270) (41,555) (53,593) General Miscellaneous 287 0 287 Telephone and Other Communication 2,380 0 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 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)

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

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)