Hikurangi Swamp Working Group Meeting 23 rd June 2016 Meeting held at Fonterra’s Jordan Valley Farm 1000 - 1200
Agenda Topic/Owner Information 1 Last Meeting Minutes 2 Pocket Representation Tanekaha Pocket Representative 3 Operations/Maintenance 1. Monthly Overviews from Hydrotech (January to May) 2. Pump Availability 3. Power Usage 4. Pump Operation 5. New Signage 6. Maintenance Activities (Photographs) - Bermland Spraying - Maruarua Stream Rapids Removal - Jack’s Swale - Tanekaha Weed Screen - Weed Screen Clearing Excavator Pads 4 Finances Hydrotech Monthly Finance Review OPEX 2015/16 OPEX 2016/17 2016/17 Drain Clearing Budget & Discussion NIWA’s eel monitoring study 5 Environment Tanekaha Drain Fencing Tanekaha Ox-bow Restoration Okarika Ox-Bow Restoration 6 Level of Protection Option for Enhanced Protection - Original Scheme Part 2 7 Objectives Short, Medium & Long Term Objectives 8 AOB
Pocket Representation – Tanekaha Pocket Representative • Tanekaha no longer has a pocket representative • Suggestions?
Operations and Maintenance – Overview of HydroTech’s January Report • Fairly dry month with an extended rain event which lasted 3 – 4 days • Rain distribution was uneven, with Okariki River remaining low whilst Ngararatunua, Te Mata & Otonga saw rising river levels
Operations and Maintenance – Overview of HydroTech’s February Report • Month was mostly wet with a couple of dry periods • Panel Tech undertook the concrete repairs at Ngararatunua during the dry spells • Soda block removals were underway on the Maruarua Stream • Storm in the middle of the month saw most of the pump stations operating
Operations and Maintenance – Overview of HydroTech’s March Report • Weather was quite wet, with a storm in the first week of the month, a second storm later in the month missed the Hikurangi Catchment • Quarterly maintenance checks were undertaken across all the stations and eel monitoring equipment was installed at Mountain Pump Station.
Operations and Maintenance – Overview of HydroTech’s April Report • April was settled with only a couple of rain events causing a number of pumps to operate • Lambert Drain’s flood gate was damaged as it was forced to operate against a high river
Operations and Maintenance – Overview of HydroTech’s May Report • May was dry, with only ca couple of rainfall events, but nothing large enough to cause pumps to operate. • Safe excavator operating pads have been installed at the pump stations and NIWA have continued monitoring with the release of tagged eels.
Operations/Maintenance - Pump Availability January to May ~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 One large & one small spare Pleugers available in storage There was 100% pump availability across the Scheme for the whole January to May period. A small number of pumps were temporarily isolated during good weather for vortex board replacements, flow straightener replacements and concrete repairs to the pump bay walls
Operations/Maintenance - Power Usage 100000 Swamp Power Cost Month/Year 2012/13 2013/14 2014/15 2015/16 August 730 0 89095 3000 90000 September 30404 5083 26787 5481 October 30179 16498 47467 10255 80000 November 15947 10183 1901 615 December 10773 1217 621 518 January 781 243 23535 299 70000 February 2374 3479 551 1790 March 2293 833 -209 5583 60000 April 18 246 501 May 331 1412 591 June 997 2503 2199 50000 July 25065 1178 2199 Annual Total 119892 42875 195238 27541 40000 30000 20000 Swamp Power Cost 2012/13 10000 Swamp Power Cost 2013/14 Swamp Power Cost 2014/15 0 Swamp Power Cost 2015/16 -10000
HydroTech January Report Review – Pump Hours Run Pocket Pump Junction Te Mata Tanekaha Mountain Otonga Ngararatunua Okarika A 0 23 0 0 19 0 3 B 4 0 3 11 44 29 C 0 D 0 0 2 0 E 2 0 A, B & C are small (~1.1m 3 ) pumps, D & E are the larger (~4.1m 3 ) pumps
HydroTech February Report Review – Pump Hours Run Pocket Pump Junction Te Mata Tanekaha Mountain Otonga Ngararatunua Okarika A 0 14 7 18 41 44 62 B 74 9 44 35 48 68 C 59 D 16 0 20 35 E 9 19 A, B & C are small (~1.1m 3 ) pumps, D & E are the larger (~4.1m 3 ) pumps
HydroTech March Report Review – Pump Hours Run Pocket Pump Junction Te Mata Tanekaha Mountain Otonga Ngararatunua Okarika A 0 89 30 45 51 47 73 B 102 6 62 81 47 77 C 28 D 14 12 0 17 E 0 0 A, B & C are small (~1.1m 3 ) pumps, D & E are the larger (~4.1m 3 ) pumps
HydroTech April Report Review – Pump Hours Run Pocket Pump Junction Te Mata Tanekaha Mountain Otonga Ngararatunua Okarika A 0 55 9 19 20 0 0 B 33 0 52 13 0 0 C 0 D 0 0 0 0 E 0 0 A, B & C are small (~1.1m 3 ) pumps, D & E are the larger (~4.1m 3 ) pumps
HydroTech May 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 10 0 0 0 C 0 D 0 0 0 0 E 0 0 A, B & C are small (~1.1m 3 ) pumps, D & E are the larger (~4.1m 3 ) pumps
Bermland Spraying
Maruarua Stream Rapids Removal Length of drain cleared of rapids Old river loop which has been filled with excavated material
Maruarua Stream Rapids Removal - Before
Maruarua Stream Rapids Removal - After
Maruarua Stream Rapids Removal - Disposal
Jack’s Swale
Jack’s Swale - Before
Jack’s Swale
Jack’s Swale
Jack’s Swale
Jack’s Swale
Jack’s Swale
Jack’s Swale
Jack’s Swale
Jack’s Swale
Jack’s Swale
Tanekaha Screen Replacement - Before
Tanekaha Screen Replacement - After
Weed Screen Clearing Pads - Before
Weed Screen Clearing Pads - Before
Weed Screen Clearing Pads - After
Weed Screen Clearing Pads - After
Weed Screen Clearing Pads - After
HydroTech January Report Review - Finances Flood Inspection Maintenance Environmental Attendance Drain Clearing $2,638.24 $10,516.19 $171.49 $483.01 - Inspections Preliminary & General (Monthly Checks) Maintenance Replace cable sleeve & bracket Vortex board materials Pump bay access ladder repairs New flow straightener Install pads for weed clearing excavator Purchase spat ropes Environmental Weed control in restored ox-bows Flood Attendance 6 visits including use of excavator
HydroTech February Report Review - Finances Flood Inspection Maintenance Environmental Attendance Drain Clearing $2,638.22 $10,886.30 $806.84 $1480.45 $35,598.95 Inspections Preliminary & General (Monthly Checks) Maintenance Concrete wall repairs at Ngararatunua Station Rust treatment on Pleugers Installation of vortex board Replace pump bay access ladders Installation of flow straightener Environmental Collection and preparation of spat ropes Assist NIWA with eel monitoring equipment installation Padlock and chain for ox-bow gates Grating modifications for eel monitoring equipment installation Flood Attendance 11 visits including use of excavator Drain Clearing Ngararatunua pocket cleaning and Maruarua Stream rapids removal
HydroTech March Report Review - Finances Flood Inspection Maintenance Environmental Attendance Drain Clearing $3,379.52 $18,009.14 $2.371.21 $1.233.14 $59,037.08 Inspections Preliminary & General (Monthly Checks) & Quarterly checks Maintenance Replace corroded washes on handrails Install pads for weed clearing excavator Replace pump bay access ladders Installation of flow straightener Re-galvanize grates Fabricate flow ring replacement Fabricate flow straightener Environmental Assist NIWA with eel monitoring equipment installation Flood Attendance 19 visits including use of excavator Drain Clearing Clearing drains in Okarika Pocket Installing Jack’s Swale Additional work on Maruarua Stream Rapids Removal Riparian Spraying
HydroTech April Report Review - Finances Flood Inspection Maintenance Environmental Attendance Drain Clearing $2,727.60 $2,821.88 $1296.56 $209.81 $11,187.41 Inspections Preliminary & General (Monthly Checks) Maintenance Repair Lambert flood gate winch and post Pump down pump bay and lock out Galvanize flow straightener Tomo investigation at Mountain Station Environmental Assist NIWA with eel monitoring equipment installation Installing power supply for electric eel barrier Flood Attendance 2 visits Drain Clearing Clearing Lambert Drain of dead weeds Maruarua Stream Rapids removal additional work
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