TEKAPO POWER SCHEME ENVIRONMENTAL REPORT // 01.07.13 30.06.14 ENVIRONMENTAL 14 Discuss Matters Directly Withinterested Parties

TEKAPO POWER SCHEME ENVIRONMENTAL REPORT // 01.07.13 30.06.14 ENVIRONMENTAL 14 discuss matters directly withinterested parties. Genesis Energy ishappyto provide furtherdetails ortechnical reports or to reproduce orreplicate thisinformation, rather to provide asummaryofit. agreements thathave fed into thisreport; itisnottheintention ofthisreport of technical reports, research programmes, environmental initiatives and for theoperating period1July 2013to 30June2014.There are anumber This report summarisesthekey outcomes attheTekapo Power Scheme HIGHLIGHTS 1 July 2013 to 30 June 2014 02 01 INTRODUCTION 02 1.1 Document Overview Tekapo Canal Remediation Project The Tekapo Canal 02 1.2 Resource Consent Overview Remediation Project was successfully completed. The works 02 1.3 How to use this document were completed ahead of time, to specification, and without any 02 1.4 Genesis Energy’s Approach significant health and safety incidents and with full resource to Environmental Management 02 1.4.1 Genesis Energy’s Values consent compliance (Section 7) 02 1.4.2 Environmental Management System Tekapo Canal Road access The length of the Tekapo Canal 03 1.4.3 Resource Consents Management System 03 1.4.4 Hydrology Road has been opened for access to pedestrians and cyclists 03 1.5 Feedback following the completion of the Tekapo Canal Remediation Project. Public vehicles retain access to the upper seven 04 02 TEKAPO POWER SCHEME 05 2.1 Operating the Tekapo Power Scheme kilometres and to the lower four kilometres of the Tekapo Canal 05 2.2 Climate and Power Generation Road. Genesis Energy has incorporated improved signage, parking and toilet facilities at the lower end of the Tekapo Canal 06 03 LAKE TEKAPO 07 3.1 Hydrology (Section 8.4). 08 04 TEKAPO RIVER AND LAKE GEORGE SCOTT Environmental Monitoring Genesis Energy completed four 09 4.1 Hydrology synoptic environmental monitoring studies which provide a 10 4.2 Recreational Releases snap shot of the current environment in which the Tekapo 11 05 TEKAPO A POWER STATION, TEKAPO CANAL AND Power Scheme operates. The results provide information to TEKAPO B POWER STATION determine the future environmental monitoring needs for the 12 5.1 Hydrology Tekapo Power Scheme (Section 6) 13 5.2 Water Management Agreement 13 5.2.1 The Pukaki Supply Flow Cultural Health Assessment Representatives from Te Runanga 13 5.2.2 High Flow Management Coordination Group o Moeraki, Te Runanga o Arowhenua and Te Runanga o Waihao 14 06 ENVIRONMENTAL MONITORING embarked on a project in partnership with Genesis Energy to 15 6.1 Introduction build on the understanding of the cultural significance of the 15 6.2 Lake Tekapo Shoreline area around the Tekapo Power Scheme (Section 8.1). 15 6.3 Aquatic Ecology of the Tekapo River and its Tributaries 16 6.4 Water Quality Lake Tekapo Community Fund The Lake Tekapo Community 16 6.5 Hydrology Fund saw $50,000 awarded to eight Lake Tekapo community 16 6.6 Future Environmental Monitoring Requirements initiatives. The Lake Tekapo Community Fund was set up to 17 07 TEKAPO CANAL REMEDIATION PROJECT recognise the Lake Tekapo community’s support during the 18 7.1 Overview Tekapo Canal Remediation Project (Section 9.5). 18 7.1.1 Construction Management Site 18 7.1.2 Internal Canal Repair Works 20 7.2 Resource Consents ABBREVIATIONS 21 7.3 Environmental Management 21 7.3.1 Tekapo Canal Water Quality Management AER Annual Environmental Report 22 7.3.2 Ground and Surface Water Monitoring CCC Christchurch City Council 22 7.3.3 Fish Salvage CSR Comprehensive Safety Review 23 7.3.4 Dust Management DO Dissolved Oxygen 23 7.3.5 Noise Management DOC Department of Conservation 23 7.3.6 Traffic Management EMS Environmental Management System 23 7.3.7 Lighting Management GWh Gigawatt hour 23 7.3.8 Contaminant Spill Contingency Management HiCoG High Flow Management Coordination Group 24 7.3.9 Stormwater, Sediment and Erosion Control Management HNZ Housing New Zealand 24 7.3.10 Archaeological Discovery Management kW Kilowatt 24 7.3.11 Rehabilitation masl Metres above sea level – Moturiki Datum 24 7.4 Communication MW Megawatt 25 7.5 Lake Tekapo Levels and Tekapo River Spill NIWA National Institute of Water and Atmospheric Research 25 7.6 Acknowledgements PRR Project River Recovery 26 08 SCHEME-WIDE OUTCOMES PV Photovoltaic 27 8.1 Cultural Health Assessment RCMS Resource Consent Management System 27 8.2 Project River Recovery - Department of Conservation RECC Renewable Energy Control Centre 28 8.3 Lake Alexandrina Fishery Enhancement Project SMP Supplementary Management Plan - Fish and Game TekPS Tekapo Power Scheme 29 8.4 Tekapo Canal Road Access WMA Water Management Agreement 30 8.5 Maintenance Activities 30 8.5.1 Oil Interceptor Inspections 30 8.5.2 Maintenance of Fork Stream Culvert 30 8.5.3 Removal and Planting of Trees at Tekapo A Power Station 30 8.5.4 Redundant Lake Tekapo Water Supply Pump Removal 30 8.5.5 Tekapo Canal Remediation Project 30 8.5.6 Control System Upgrades 30 8.5.7 Generator Refurbishment 31 8.6 Dam Safety 30 8.7 Public Complaints 30 8.8 Publically Available Hydrology Information 32 09 COMMUNITY AND ENVIRONMENTAL INITIATIVES 33 9.1 Schoolgen 33 9.2 Lake Tekapo Footbridge Society 33 9.3 Aoraki Bound - Ngãi Tahu 34 9.4 Whio Forever 34 9.5 Lake Tekapo Community Fund 35 9.6 Tekapo 10 35 9.7 Alder Removal 35 9.8 Curtain Bank 36 10 KEY OBJECTIVES 37 10.1 Review of Key Objectives for 2013-2014 38 10.2 Key Objectives for 2014-2015 39 11 REFERENCES Cover photo: Representatives from Te Runanga o Waihao, Te Runanga o Moeraki, Te Runanga o Arowhenua, Cawthron Institute, Fish and Game, Department of Conservation, and Genesis Energy during the Tekapo Canal Remediation Project fish salvage operation (see Section 7.3.3 ). 02 TEKAPO // 14 those consents related to theTekPS. those required to make GenesisEnergy theconsent holderfor the timeofsale remained unchanged.Theonly modifications were Meridian Energy. Obligationsundertheseresource consents at the Sale andPurchase Agreement between GenesisEnergy and split ortransferred to Genesis Energy on1June 2011 aspartof Resource consents for theon-goingoperation oftheTekPS were 1.2 RESOURCECONSENTOVERVIEW www.genesisenergy.co.nz copy ofthisdocument,can befound onthe website: More information aboutGenesisEnergy, includinganelectronic references). undertaken (refer to specific technical reports listed inthe information onmonitoring programmes andotherinitiatives Annual Reportfor thisinformation) orprovide extensive detailed It doesnotdetail company strategy orperformance (refer to the environmental andstakeholder activitiesrelating to theTekPS. the company’s AnnualReport.Itprovides anoverview ofall This AERbridgesthegapbetween site specific reporting and Energy’s performance asacompany. The Company’s AnnualReportprovides anoverview ofGenesis site/local level. requirements to stakeholders. They address specificissues ata detailed technical reports, auditreports andvarious reporting documentation onitsactivitieseachyear (Figure 1).Theseinclude Genesis Energy produces asuite ofreports andother 1.1 DOCUMENTOVERVIEW within thecommunities inwhichitoperates. issues asthey ariseandto develop closer working relationships Genesis Energy aimsto beaccessible to thepublic,to address This report will: for theTekPS andfollows theprevious year’s (2012-2013)report. June 2014(the‘reporting period’).Thisdocumentisthethird AER activities thatoccurred attheTekPS between 1July 2013and30 to update thecommunity andstakeholders onthewiderange of the Tekapo Power Scheme(TekPS). Thepurposeofthisreport is Welcome to the2013-2014AnnualEnvironmental Report(AER)for Ripoata Taiao ehãngaianakingãmahihihiko mõte rohe oTakapõ. E mihianakiakoutou irungangãtiniãhuatanga ote wã.Aneite 01 INTRODUCTION eport oncommunity andenvironmental initiatives; and eport backonkey projects; ovide anupdate onmonitoring andresearch programmes; ovide anoverview ofresource consent compliance atTekPS; FIGURE define envir r r pr pr

Report onmental objectives for thenext 12months.

hierarchy

Genesis

Energy.

Genesis Energy Values help contribute to thesuccess ofthecompany. at GenesisEnergy. They are theactionsandbehaviours which Genesis Energy’s four core values definethewaythingsare done 1.4.1 GENESISENERGY’S VALUES ENVIRONMENTAL MANAGEMENT 1.4 GENESISENERGY’S APPROACH TO background information onspecificissues. Orange text like thisthroughout thereport provides useful to specific resource consent conditions. Consent #(condition) identifiesthepartsof report that relate Bold text like thiswillhelpyou to find your wayaround the report. (chapter 6)andtheTekapo CanalRemediationProject (chapter 7). There isalsoachapter whichdescribesEnvironmental Monitoring ower Station. This report alsoprovides information for: onmental effects –andshare thisinformation with the ommunity andstakeholders; and esources andtaonga within therohe; onmental decisionmaking; takeholders, sothattheirviews can beincorporated into business. GenesisEnergy’s Environmental Values are to: that GenesisEnergy strives to achieve intheoperation ofits full regulatory compliance isconsidered theminimumstandard social awareness are thecornerstones ofitsbusiness. Achieving Genesis Energy iscommitted to ensuringthatenvironmental and tomers, ourcommunities andtheenvironment. 1.4.2 ENVIRONMENTAL MANAGEMENT SYSTEM energy inNew Zealand.We willachieve thisby: Genesis Energy’s intent isto become thepreferred provider of eated. key areas ofthescheme: This report documentsenvironmental outcomes basedonthree 1.3 HOW TO USETHISDOCUMENT operative until30April2025. minor maintenance works around thescheme.Theconsents are water from Lake Tekapo throughout theTekPS andto allow for of water permits,landuseanddischarge permitsto take anduse District Council and Environment Canterbury. They include a range The resource consents for theTekPS are regulated byMackenzie ekapo APower Station, Tekapo CanalandTekapo B ekapo River andLake Georgee Tekapo; Scott; and estigate to better understand thenature ofour wledge that ouractivitiesaffect boththeenvironment oster close relationships withthecommunity and ating inawaythatissafe andhealthyfor ourpeople, our ering efficientservice andsmartsolutions to customers; e –We achieve withenergy, courage andcommitment. Community andEnvir Scheme-wide Out T T Lak Seek envir Inv Respect ther Ackno F Act withint Oper ‘Living’ ourv Optimising theperf Deliv Support –W Imagine –W Driv Respect –W P our busines c envir r and thec envir s cus be tr ommunities withinwhichwe operate; onmental improvements inallaspectsof

egrity atalltimes; s. e work together, take responsibility andhave fun. e challenge today andchangetomorrow. e treat people andplaces aswe would wishto alues; and

ole oftangata whenuaaskaitiakiofthenatural comes; and ormance ofourgeneration portfolio; onmental Initiatives.

data set. re-examined before being appendedto theGenesisEnergy Archive provided to Genesis Energy onaquarterly basis.Thisdata isthen Data collected byNIWA must be internally reviewed before being hydrology monitoring around theTekPS. Services Contract thatGenesisEnergy holdswithNIWA for hydrometric network. Thehydrologist managestheHydrometric hydrologists whocollect data andmanageGenesisEnergy’s stored withinGenesisEnergy. GenesisEnergy alsohasin-house (NIWA) andotherthird parties.Data iscollected, managedand by theNationalInstitute ofWater andAtmosphericResearch The TekPS hydrology data iscollected onbehalfofGenesisEnergy market information. located inTokaanu, together witharange ofplantand to GenesisEnergy’s Renewable Energy Control Centre (RECC), recording sites collect data inreal-time. Thisinformation issent around theTekPS. Avariety ofwater level, flow andmeteorological Genesis Energy hasanextensive hydrology monitoring network 1.4.4 HYDROLOGY compliance withenvironmental reporting procedures. had beensuccessfully addressed, andobserved excellent overall that therequired actionsfrom theprevious (2012-2013)audit third partyagreements were internally audited. Theauditfound During thereporting periodtheTekPS resource consents and 2014/15 reporting period. implementation ofthesechangeswillberolled-over into the the incorporation ofthechangeswasdeferred. Asaresult, the the 2013/14 reporting period, but due to IT infrastructure upgrades project wasplannedto incorporate thesechangesintheRCMS functionality andensuringthatthesystem ismore user-friendly. A to theRCMSwere identified includingenhanced reporting During the2012/13reporting period,required improvements or processes to best achieve 100%compliance. identify anyimprovements thatcould bemadeto RCMSsystems the auditisto ensure correct procedures are beingfollowed andto undertaken onanannualbasisatgeneration sites. Thepurposeof An internal RCMSandenvironmental compliance auditis party agreements. or view potentially confidential information contained withinthird Environmental Team can make changesandupdate/sign offtasks, company’s intranet butonly designated administrators withinthe All GenesisEnergy staff can access theRCMSthrough the are notoverlooked. stakeholder obligations effectively and that essential requirements RCMS isto ensure thatGenesisEnergy managesitsstatutory and conditions, andreports onthestatus ofthese.Thepurposethe and defines,prompts andmonitors actions required bytheir consents, third partyagreements, andpermitted activities, (RCMS). Thissystem holdsallinformation relating to resource Energy hasdeveloped aResource ConsentManagementSystem To helpmanagecompliance across allgeneration sites, Genesis 1.4.3 RESOURCECONSENTMANAGEMENT SYSTEM overarching Business ManagementSystem. Environmental Standards inalignmentwiththeCompany’s these standards. Thisincludesthedevelopment ofcore internal standard), andwillseekto alignitsEMSmore closely with for environmental managementsystems (e.g.theISO14001 EMS against relevant nationalandinternational standards During thereporting period,GenesisEnergy reviewed its Genesis Energy’s normalday-to-day operational activities. environment, from theconceptual stage ofanyproject through to involving theuseofnatural andphysical resources andthe with othercore business systems. TheEMSappliesto allactivities suite ofmanagementprocesses andtools thatare well integrated Environmental ManagementSystem (‘EMS’)whichincorporates a To give effect to thesevalues, GenesisEnergy implements an Attn: Environmental Lead-SouthIsland CHRISTCHURCH 8149 Tower Junction PO Box 9056 Genesis Energy layout. Contact details are asfollows: easy to understand. Your feedback iswelcome onbothcontent and Genesis Energy hasworked to make thisreport informative and 1.5 FEEDBACK

03 ENVIRONMENTAL REPORT // 14 04 TEKAPO // 14 02 POWER TEKAPO

SCHEME orographic rainfall effect induced bytheSouthernAlps. 509 mm(atanaltitudeof710masl). Thisclearly illustrates the of 1509masl)is5362mmcompared withLake Tekapo whichis Panorama Ridge at thetop oftheGodley catchment (atanaltitude southeast oftheMackenzie Basin.Themeanannualrainfall at of rainfall whichdecreases rapidly from thenorthwest to the shadow created bytheSouthernAlps.There isa steep gradient Rainfall across theMackenzie Basinisinfluenced bythe rainfall 2.2 CLIMATE AND POWER GENERATION and stakeholder relationships for theTekPS. responsible for managingtheresource consents, andcommunity An Environmental Team isbasedinChristchurch andis circumstances. also operate thepower schemelocally ifrequired inrare 24/7 to fix faults ordefects asthey ariseandthis team can including roaming operators. TheMaintenance Team isavailable Operator/Maintainer staff are basedatTekapo APower Station, standard operating limits(includingresource consent limits). alerting operators whenvarious parameters trend outsidetheir details onallaspectsofthescheme,enablingremote control and market rules. Acomplex operational control system provides resource consent conditions andoperating withintheelectricity generation requirements, while maintaining compliance with Scheme asefficiently aspossible, to optimiseelectricity Schemes. The24/7control centre operates theTekapo Power power schemes;Waikaremoana, Tongariro andTekapo Power southern endofLake Taupo). TheRECCoperates three hydro is located attheTokaanu Power Station (nearTurangi atthe Genesis Energy’s Renewable Energy Control Centre (RECC) 2.1 OPERATING THETEKAPOPOWER SCHEME through afurthersixpower stations within the Waitaki Catchment. with outflows entering Lake Pukaki.Thissamewater thenpasses waterline. Thestation ispowered bywater from theTekapo Canal However, nearly two thirds ofthepower station isbelow the Constructed onconcrete raft foundations, Tekapo Bis46mhigh. is connected to landviaa74mlong bridge. water. SittinginLake Pukaki,essentially asan island,thestation only power station inNew Zealand completely surrounded by Commissioned in1977,Tekapo BPower Station (160MW)isthe that impoundsLake George Scott, orcontinue to theTekapo River. into theTekapo Canalviaagate inthecontrol structure (Gate 17) Tekapo River to Lake George Scott. Water can thenbereleased When thecontrol gates are open,water flows down theupper released through theLake Tekapo Control Structure (Gate 16). Water inLake Tekapo can bypass Tekapo APower Station bybeing of 130cubicmetres persecond (m Tekapo Ato Tekapo B.TheTekapo Canalhasamaximumcapacity In 1970a25.5kmcanal wasconstructed to take outflows from from water diverted from Lake Tekapo viaa1.4kmtunnel. an average of160Gigawatthours (GWh) ofelectricity peryear finally commissioned in1951. Tekapo A Power Station generates and materials were diverted to World War II.Thestation was began in1938butwashalted between 1942and1944aslabour Construction oftheTekapo APower Station (25Megawatts(MW)) forms thebridgeover theriver atState Highway8(SH8). Structure (Gate 16)attheheadofTekapo River whichalso Scheme. Thelake isdammedbytheLake Tekapo Control Lake Tekapo isthesource ofwater for theentire Tekapo Power Cook andneartheLake Tekapo township. stations. Theschemeissituated close to themajestic Aoraki /Mt fed Lake Tekapo to generate electricity through two power Valley intheMackenzie District anduseswater from theglacial- The Tekapo Power Schemeislocated attheheadofWaitaki 02 TEKAPOPOWER SCHEME 3 /s). long term average of509mm. 90% oftheexpected annualrainfall at456.5mmcompared to a Tekapo gaugelocated neartheLake Tekapo Township recorded in thegaugesupperGodley catchment (Table 1).TheLake During thereporting period,rainfall wasslightly above average level below theMaximumControl Level. average rainfall whichenabled GenesisEnergy to control thelake The periodofhighinflows wasimmediately followed byaperiodof control level untiltheTekapo Canalreturned to service. down theTekapo River to maintain thelake level below maximum its maximumcontrol level. Acontrolled spillevent wasinitiated Tekapo risingtwo metres in20days,pushingthelake towards outflow from Lake Tekapo waslimited. This resulted inLake with thestart oftheTekapo CanalRemediation Project where In early January,566mmofrain fell in12days.Thiscoincided remained highthroughout thistime. at thistimeincreased thelake level even thoughgeneration Tekapo CanalRemediation Project. Thehighrainfall andinflows maintained atalow level inpreparation for seasontwo ofthe autumn receiving lower totals. DuringOctober 2013the lake was with spring,summerandwinter receiving highertotals and remainder oftheyear therainfall pattern metseasonaltrends to halfofthetotal meanannualrainfall wasrecorded. For the months ofOctober, JanuaryandMay-duringthesemonthsclose The rainfall intheuppercatchment wasextremely highinthe 126,159 households. enough electricity to power theannualdemandofapproximately 2012: p121),the979GWh produced inthereporting periodwas household of7,760kWh/yr(Ministry ofEconomic Development, Based onanaverage figure ofelectricity consumption per generation wasnotpossible for 51daysdueto thecanal outage. reporting periodwasslightly above average (964GWh), even though GWh for thereporting period. Generation for theTekPS duringthe Station generated 899GWh givingatotal for theTekPS of979 Tekapo APower Station generated 80GWh while Tekapo BPower Panorama Ridge Eade Hut oioigSt analTtl(m LongTerm Average (mm) Rainfall Total (mm) Monitoring Site FIGURE TABLE

Rainfall

Mean

daily

during

inflows

the

reporting

for 5,795 5,139

Lake

Tekapo. period.

5,390 4,920

05 ENVIRONMENTAL REPORT // 14 06 TEKAPO // 14 03 TEKAPO LAKE varies throughout the year: and 710.9masl.Theminimumoperating level ofLake Tekapo Genesis Energy to operate thelake between alevel of701.8masl resource consents CRC905301.4andCRC905302.3whichenable The managementofthelevel ofLake Tekapo isauthorisedvia Resource ConsentCRC905301.4 crossing pointfor State Highway8over theTekapo River. head oftheTekapo River. Thecontrol structure alsoforms the is dammedbytheLake Tekapo Control Structure (Gate 16)atthe Lake Tekapo isthesole source ofwater for theTekPS. Thelake 3.1 HYDROLOGY outflow ofLake PukakiandLake Ohau. Mackenzie Plainsinawidestream before beingjoinedbythe outflow ofLake Tekapo (the Tekapo River) meandered across the Prior to thedevelopment oftheTekapo Power Scheme,the to gatherfoods suchastuna(eel),weka andavariety ofwaterfowl. tribe) ofSouthCanterbury. Whãnautravelled to Tekapo (Takapõ) gathering area), particularly for thelocal NgãiTahu hapu(sub- Lake Tekapo (Takapõ) wasanimportant mahingakai(food the terminal moraine damastheglaciers retreated. moraines thatdammedthevalley. Lake Tekapo wasformed behind these glaciers caused large volumes ofrock to bedeposited creating out to thesloping plainsoftheMackenzie country. Themovement of glaciers flowing from theSouthernAlps,through theGodley Valley, The last glacialmaximumapproximately 17,000years agoresulted in including theGodley River, Macaulay River andCass River. are transported to Lake Tekapo viatherivers thatfeed thelake by suspendedfinesiltscreated byglaciation.Thesefinesilts the Lake George Scott weir continued until7March 2014, thisisa could thenbemaximised.Aprogressive reduction ofspill over so spilldown theTekapo River wasminimisedwhile generation generation, thelake wasmanagedto 98%of fullcapacity, in doing On 26February 2014,whenthecanal wasagainavailable for spill flow commencing down the Tekapo River on23January 2014. inflows fillingLake Tekaponear tomaximum control level and water wasnotable to flow through thescheme.This resulted in Tekapo AandTekapo Bpower stations were outofservice and two oftheTekapo CanalRemediationProject, theTekapo Canal, with theminimumandmaximumcontrol levels. Duringseason During thereporting period Lake Tekapo was100%compliant period withmaximumandminimumcontrol levels overplotted. Figure 3shows thelevel ofLake Tekapo duringthereporting of theElectricity Industry Act2010”(spillrules). November 1990),asmodifiedbyanorder pursuant to Section122 Power Scheme,AppendixA,Extracts ofWaitaki Operating Rules (9 Tekapo inaccordance withtheprovisions contained in“Tekapo require GenesisEnergy to control andoperate thelevel ofLake The conditions attached to resource consent CRC905301.4also The maximumoperating levels for Lake Tekapo are asfollows: when thelevel ofLake Tekapo falls below 704.5masl. District Council,to liaisewiththeLake Tekapo CommunityBoard responsibilities underastakeholder agreement withMackenzie Island minzoneshave beenbreached. GenesisEnergy alsohas reserve generation capacity isrequired, ortheNationalSouth and 31March iftheElectricity Commission determines that level ofLake Tekapo maybefurtherreduced between 1October However, inaccordance withresource consent CRC905302.3,the of around 95km Lake Tekapo isapproximately 25kmlong andcovers anarea 03 LAKETEKAPO ch –MaximumLevel of710.0masl; ember to February –MaximumLevel of709.7masl; ober and31March –MinimumLevel of704.1masl. June andJul April andAugus Mar Sept 1 Oct 1 Apriland30Sept 2 . Theturquoise colour ofthelake iscaused y –MaximumLevel of710.9masl. t –MaximumLevel of710.3masl;and ember –MinimumLevel of701.8masl;and

both ofthesescenarios GenesisEnergy wasfully compliant. ramp down rules for theinstigation andstopping oftheflows. For consent conditions require GenesisEnergy to follow ramp upand Tekapo was100%(Table 2).Duringtheperiodofspillresource the reporting period,compliance for maximumlake level ofLake consent CRC905309.4(spillover Lake George Scott weir). During level. Spillflow from Lake Tekapo isenabled under resource with thespillrules ifLake Tekapo isatorabove maximumcontrol Maximum lake level compliance isdetermined bycompliance scheme byGenesisEnergy. flood controllers were kept informed offlows throughout the the weir must follow. Duringthistime,Environment Canterbury consented established-flow process thatallestablished flows over aaee au ms)Cmlac % ConsentNumber Compliance (%) Value (masl) Parameter Level Minimum Lake Level Maximum Lake r FIGURE r TABLE eporting eporting

period. period. //

Lake

Tekapo

701.8 -704.1 709.7 -710.9 Tekapo

lake

level

compliance

compliance 0 CRC905301.4 (2) 100 0 CRC905301.4 (2) 100

during

the

(condition)

07 ENVIRONMENTAL REPORT // 14 08 TEKAPO // 14 04 GEORGE AND TEKAPO

LAKE

RIVER SCOTT

River downstream ofGate 16inthefollowing circumstances: Genesis Energy typically only allows water to spillinto theTekapo Tekapo River viatheLake Tekapo Control Structure (Gate 16). Table 3. maximum consented flow duringthe reporting periodasshown in from Lake Tekapo Control Structure was100%compliant withthe Lake Tekapo Control Structure andLake George Scott weir. Flow om Tekapo BPower Station. Figure 4presents flow data for the w intheTekapoTekapo River between the Canalto achieve maximumgeneration ekapo BPower Station; eached andthecapacity oftheTekapo APower Station isnot operation. Thegates have atotal discharge capacity of850m around three years after Tekapo Apower station commenced gates thatwere constructed across theoutlet ofthelake in1954, Control Structure (Gate 16).Gate 16consists offive steel radial is dammedandcontrolled for hydro-electricity attheLake Tekapo The Tekapo River isthenatural outlet ofLake Tekapo, althoughit 04 TEKAPORIVERANDLAKEGEORGESCOTT discharge upto 850m Resource consent CRC905304.3enables GenesisEnergy to Resource ConsentCRC905304.3 4.1 HYDROLOGY Benmore. the PukakiRiver before discharging into theHaldonArmofLake Grays andMaryburnRivers. TheTekapo River converges with by springfed flows andtributaries suchas Fork Stream, andthe The Tekapo River isapproximately 45kmlong andisaugmented down theTekapo River to Lake Benmore. Tekapo can alsoflow over Lake George Scott weir and continue be discharged into theTekapo CanalviaGate 17.Water from Lake spilled from Lake Tekapo andimpoundedinLake George Scott can of Gate 16byaconcrete weir, creating Lake George Scott. Water The Tekapo River isdammedapproximately 2kmdownstream SH8 crosses thedamstructure atGate 16. o top-up Lake George Scott withthepurposeof augmenting or recreational release purposes;or e isanoutage event attheTekapo APower Station and r FIGURE eporting T F If ther When themaximumoper fr flo T Genesis Ener sufficient t r

period. //

Flow o reduce thelevel ofLake Tekapo; gy still wantsto generate electricity atthe

via

3 the /s ofwater from Lake Tekapo into the

Lake

ating level ofLake Tekapo hasbeen Tekapo

Control

Structure

during

the

3 /s.

maximum consented flow of600m require flows to be ramped upanddown duringspill events. over theweir isdueto non-compliance withthespillrules, which following section(CRC905309.4). compliant (Table 4).Thiscompliance result isexplained inthe maximum level andflow over Lake George Scott weir was99.87% spill rules. Duringthereporting periodtheLake George Scott level ofLake George Scott isdetermined bycompliance withthe enabled underresource consent CRC905309.4andthemaximum occurs down theTekapo River. Spillfrom Lake George Scott weir is Once themaximumlevel ofLake George Scott isreached, spill shows thelevel ofLake George Scott duringthereporting period. masl whichisalsothelevel ofthespillcrest oftheweir. Figure 5 Genesis Energy operates Lake George Scott to alevel of684.05 Resource ConsentCRC905306.3 consent enables GenesisEnergy to discharge upto 600m George Scott iscontrolled byresource consent CRC905309.4.This The spillingofwater into theTekapo River downstream of Lake Resource ConsentCRC905309.4 over theweir reached amaximumof104m George Scott weir flow was99.87% compliant (Table 4).Spill flow flow over the weir (Figure 5).During the reporting periodLake Flow above themaximumlevel ofLake George Scott results in Industry Act2010”. modified byanorder pursuant to Section122ofthe Electricity A, Extracts ofWaitaki Operating Rules (9November 1990),as with theprovisions contained in“Tekapo Power Scheme,Appendix spilling ofwater underthisconsent isalsomanagedin accordance water into theTekapo River over theLake George Scott weir. The aaee Value (m Parameter Maximum Flow aaee au ml opine()ConsentNumber Compliance (%) Value (msl) Parameter Level Maximum Lake Maximum Flow FIGURE c TABLE c TABLE ompliance ompliance

3 4

// //

Flow Lake

Lak during during e

via

George George

the the

the

reporting reporting

Lake 684.05

Scott Scott 850 600 ³ s opine()ConsentNumber Compliance (%) /s)

Tekapo

lake lake

period. period.

level level 3

/s. Non-compliance withflow Control

and during 98 CRC905306.3(2) 99.87

weir Structure 3 0 CRC905304.3(3) 100 /s, well below the

the

flow

reporting

CRC905309.4 (3)

(condition) (condition)

3 period. /s of

09 ENVIRONMENTAL REPORT // 14 10 TEKAPO // 14 Gate 16openingto thestart ofGate 16closing). Ittakes approximately 15minutes for flow to reach both18m *Actual Average Flow iscalculated from whentheflow has reached the required level (release duration is calculated from the start of flow. **Release delayed due to canoe course set-upandpreparation. compliance ofrecreational releases duringthereporting period. Throw Down andthe Otago Whitewater Club.Table 5outlinesthe by, andprovided for, theOtago University CanoeClub,Tekapo During thereporting period,recreational releases were requested releases are managed. Canterbury) istheguidingdocumentunderwhichrecreational Tekapo Whitewater Trust (andwiththeagreement ofEnvironment agreement between GenesisEnergy, Whitewater NZandthe a-d) stipulates criteria for recreational releases, thestakeholder George Scott. While resource consent CRC905301.3(Condition13 kayak ontheupperTekapo River between Gate 16andLake released from theLake Tekapo Control Structure (Gate 16)to by diversion from theTekapo River. Kayakers alsousewater water released from Lake Tekapo andistaken into thecourse course in1998located nearLake George Scott thatutilises The Tekapo Whitewater Trust constructed arecreational canoe Kayaking ontheTekapo River isapopularrecreational activity. 4.2 RECREATIONAL RELEASES they are still inplace andingoodcondition. and are checked annually, priorto thesummerseason,to ensure between theLake Tekapo Control Structure andLake Benmore are alsoerected at publicaccess pointsalong theTekapo River Signs warningofthefluctuationsin level ofthe Tekapo River than four hours. greater than11m are considered to beminornon-compliances. Allevents were no During thereporting period,nineminorspillevents occurred that 28-Oct-13 27-Oct-13 26-Oct-13 22-Sep-13 21-Sep-13 Date TABLE

Recreational (hours) of Release Duration Required 3 /s thathadshortlived durations ofnolonger 6.5

6 8 6 6 releases (hours) required flow or above the 16 wasopenat Duration Gate

the

canoe 6 6 7 6 6

course Flow (m Required

and 3

/s) upper 20 18 18 18 18

Flow* (m Actual Average Tekapo

River 3 /s)

during 20 20 30 19 19 Compliance Full compliance. Gates openedlater thaninitialrequested time.** Full compliance. Gates openedlater thaninitialrequested time.** Full compliance. Gates openedlater thaninitialrequested time.**

the

reporting

period. 3 /s and30m 3 Full compliance Full compliance /s from zero POWER POWER TEKAPO AND

TEKAPO TEKAPO

STATION STATION

CANAL

B A

05 11 ENVIRONMENTAL REPORT // 14 12 TEKAPO // 14 River into theTekapo Canal through Gate 17.Resource Consent divert water upto amaximum rate of130m Resource Consent CRC905307.2enables GenesisEnergy to Resource Consents CRC905307.2andCRC905308.2 Station flow wasbelow themaximum consented flow of130m into Tekapo APower Station isshown inFigure 6.Tekapo APower The flow from Lake Tekapo viatheLake Tekapo Intake Structure divert upto 130m Resource consent CRC905302.3enables GenesisEnergy to take and Tekapo Canal,which hasamaximumcapacity of130m Outflows from Tekapo Apower station enter the25.5km long 25.2 megawatt(MW)generator driven byasingle Kaplanturbine. the tunnelcan accommodate. Tekapo APower Station hasasingle operation requires flows to change faster thanwhattheflow in designed to accommodate flow differences whenthepower station long tunnel.Thetunnelterminates inasurge chamberwhichis station andpasses thewater through a6mdiameter, 1.4km structure for Tekapo APower Station draws water for thepower Situated onthesouthernforeshore ofLake Tekapo, theintake AND TEKAPOBPOWER STATION 05 TEKAPOAPOWER STATION, TEKAPOCANAL water to theTekapo APower Station via a1.4kmlong tunnel. Tekapo Township. Theintake structure enables theconveyance of structure islocated inthebedofLake Tekapo to thewest ofLake Intake Structure for hydro-electricity power generation. Thisintake Tekapo A generator refurbishment (see Section 8.5.7) to commence. allow theTekapo CanalRemediationProject (seeSection7) and the Tekapo APower Station wasrequired inearly January2014to compliant duringreporting period.Thecessation offlow through during thereporting period.Table 6shows theflow was100% Resource ConsentCRC905302.3 5.1 HYDROLOGY MW generators atTekapo BPower Station. and Tekapo BPower Station. Two Francis Turbines drive two 80 The water flows into aheadpondbefore entering thepenstocks Stream, IrishmanCreek andMaryburnStream. are accommodated byculverts underthecanal, includingForks Tekapo Canalpasses over anumberofnatural waterways which aaee Value (m Parameter Maximum Flow Structur FIGURE Structur TABLE

6 e

e //

// compliance compliance

Tekapo

Tekapo 3 /s ofwater from Lake Tekapo viatheLake Tekapo

Power

Power during during 130 ³

s opine()ConsentNumber Compliance (%) /s) Station

Station the the

reporting reporting

flow

via

period. period.

Lake

Lake 0 CRC905302.3(3) 100 3 /s from theTekapo

Tekapo

Intake

Intake 3 /s. The (condition)

3 /s (Figure 8)andwas100%compliant (Table 8). maximum consented flow for theduration ofthe reporting period Flow into Lake PukakiviaTekapo BPower Station wasbelow the Pukaki viatheTekapo BPower Station. 15 minute breach was133.98m system upgrade. Themaximumflow through Gate 17duringthe minutes on12April2013duringgate testing following acontrol Gate 17.Flow through Gate 17exceeded themaximumflow for 15 Tekapo River into theTekapo CanalviaLake George Scott and Figure 7shows theflow atGate 17that takes water from the George Scott andtheTekapo Canal). for bothconsents ismeasured atGate 17(located between Lake the Tekapo River into theTekapo Canal.Therate offlow ofwater reporting periodwas99.99%(Table 7). complaint resulting from thisminorbreach. Compliance for the CRC905308.2 alsoenables atake upto 130m discharge water upto amaximum rate of130m Resource ConsentCRC905320.2allows GenesisEnergy to Resource ConsentCRC905320.2 aaee Value (m Parameter Maximum Flow FIGURE during FIGURE r c TABLE eporting ompliance

the 7

7 8

period. // //

reporting Flow

during Flow Flow

from

from into

the

period.

Tekapo Lake

reporting Tekapo 130 ³

s opine()ConsentNumber Compliance (%) /s) Pukaki

River

River 3

/s. There wasnoimpactorpublic period.

via

into

Tekapo

Tekapo 99 CRC905307.2(3) 99.99

Canal Power

/s ofwater from Canal 3 /s into Lake

CRC905308.2 (3)

during Station (condition)

the

plant andstructures; andto review andauditafter highflow events. adverse effects ofhigh flow events on people, the environment, flow response; to manageeffectively, as far as practicable, the transfers; for communicating andcoordinating apre-emptive high communicate between thepartiesto enable data andinformation Flow ManagementCoordination Group (HiCoG)wasestablished to integrated mannerbyGenesis Energy andMeridianEnergy. AHigh The WMAsetsouthow highflow events willbemanagedinan 5.2.2 HIGHFLOW MANAGEMENT COORDINATION GROUP Supply Flow intheevent ofaplannedoutage oftheTekapo Canal. Genesis Energy isrelieved ofitsobligationsto provide aPukaki the PukakiSupply Flow could notbemaintained. UndertheWMA, Project) occurred inJanuaryandFebruary 2014,whichmeantthat *The Tekapo Canaloutage (for theTekapo CanalRemediation Agreement for eachmonthduring thereporting period. Genesis Energy wascompliant undertheWater Management Lake Pukakiandthevolume GenesisEnergy suppliedeachmonth. Table 9outlinestherequired volume ofwater to besuppliedto period, noadditionalflow was required from GenesisEnergy. the monthsofJuneto September. However, duringthereporting required to contribute to aFishandGameMinimumFlow during minimum volume ofwater eachmonth.GenesisEnergy isalso Genesis Energy is required to supply Lake Pukaki with a pre-defined Under theWMAbetween GenesisEnergy andMeridianEnergy, 5.2.1 THEPUKAKISUPPLY FLOW Catchment. relationships thatexist between thetwo companies intheWaitaki of theTekapo Power Schemeto definetheoperational inter- and MeridianEnergy wasreached aspartofthesale andpurchase A Water ManagementAgreement (WMA)between GenesisEnergy purpose ofelectricity generation. rivers andcanals throughout theWaitaki River Catchment for the take, transfer, discharge andusewater viainterconnected lakes, Genesis Energy andMeridianEnergy holdresource consents to 5.2 WATER MANAGEMENT AGREEMENT aaee Value (m Parameter September 2013 Month June 2014 May 2014 April 2014 March 2014 February 2014 January 2014 December 2013 November 2013 October 2013 August 2013 July 2013 Maximum Flow Management TABLE c TABLE ompliance

9 8

// //

Flow Total

during

Agreement.

additional Fish&Game into Required Volume (plus monthly

flow required) (Mm the

Lake

reporting

Pukaki

Pukaki 130 ³ s opine()ConsentNumber Compliance (%) /s) 80 0 179.14 88.00 (0) 67 0 275.39 301.27 86.78 (0) 88.39 (0) 90 )310.76 89.04 (0)

Supply period.

via 57 289.20 100* 258.31 100* 95.75 191.80 13.68 88.39 47.03 88.66 79.83 299.33 91.60 289.80 97.49 215.59 92.28 89.06

Tekapo 3 )

flow

B under Supplied 0 CRC905320.2(3) 100

Volume Power (Mm

the 3

) Station

Water Compliance (condition)

100 100 100 100 100 100 100 100 100 100 (%) scheme byGenesisEnergy. flood controllers were kept informed offlows throughout the the weir must follow. Duringthistime,Environment Canterbury consented established-flow process thatallestablished flows over Lake George Scott weir continued until7March 2014,thisisa 26 February 2014.Aprogressive reduction ofspillover the generation wasreinitiated attheTekapo BPower Station on Lake Tekapo wasmanagedto alevel of98%capacity before spill down theTekapo River commenced on23January2014. Remediation Project to enable storage ofinflows, however, Lake Tekapo level hadbeenlowered priorto theTekapo Canal risk to people andproperty downstream oftheTekapo scheme. kept asstable aspossible throughout thisperiodto minimisethe the canal remediation project outage. Tekapo River flows were maintain Lake Tekapo atasafe andmanageable level throughout cubic metres ofwater wasspilt,atameanflow of43cumecs, to George Scott into thelower Tekapo River. Intotal 163million occurred from Gate 16atLake Tekapo andover theweir atLake During theperiodfrom 23January2014to 7March 2014spill small flows for maintenance reasons. Station were reduced to zero until26February 2014,barringsome 7 January2014.Onthisdaytheflows from the Tekapo B Power 2014 coincided withthestart ofthesecond canal remediation on The highinflow periodspanning2January2014until11 Pukaki Canalorthespillway atLake Pukaki. level wasmanagedwithuseofhigheroutflows bymeansofthe events wasaround 360mmabove MCLandoneachoccasion the January 2014.ThemaximumLake Pukakilevel for thesethree December 2013andthethird wason2January2014until11 December 2013,thesecond wason8December 2013until16 reporting period.Thefirst wason30November 2013until3 The MCLatLake Pukakiwasexceeded three timesduringthis be initiated. Waitaki catchments meantthataHiCoGmeetingwasrequired to the endofNovember 2013thatforecast rainfall totals intheupper the endofOctober 2013untilmid-January2014.Itwasnot Lake PukakiwasheldnearMaximumControl Level (MCL)from communication protocols. to clarifyprocedures, carry outdata transfer testing andrefine sharing. GenesisEnergy andMeridianEnergy have alsomet flood managers to discuss communication protocols anddata management hasincludedmeetingswithEnvironment Canterbury Work between thepartiesinpreparation for effective flood

13 ENVIRONMENTAL REPORT // 14 14 TEKAPO // 14 06 MONITORING ENVIRONMENTAL egrity ofSH8. w Zealandhighcountry. o theartificialwater level regime, butthecharacter of study (Shore Processes andManagementLtd,2013)were: The key findingsoftheSeptember 2013Lake Tekapo shoreline shore (Figure 9and10). compilation ofalarge numberofdigital photographs ofthelake included afullcircumnavigation ofthelake byboat,andthe 2013), whenthelake level wasataround 705masl.Thisfieldwork was carried outduringthereporting period(on17September was carried outon18January2013.Asecond round offieldwork The first round offieldwork fortheLake Tekaposhoreline study management ofLake Tekapo withinitsoperational range. be undertaken, to determine how theshoreline isaffected bythe identified asanarea where anenvironmental scoping study should up to approximately ninemetres. TheLake Tekapo shoreline was of Lake Tekapo to beraised andlowered withinavariable range Genesis Energy holdsresource consents whichallow thelevel 6.2 LAKETEKAPOSHORELINE Each ofthesework-streams isdiscussed inmore detail below. better understanding oftheenvironment surrounding theTekPS. areas where additionalinformation wasrequired inorder to gaina A literature review carried outinearly 2012identifiedthese four the TekPS operates. Thefour areas ofstudy were: gain abetter understanding ofthecurrent environment inwhich In late 2012GenesisEnergy commissioned aseriesofstudies to and to continuously improve how itmanagesthoseeffects. understand theeffects ofoperating theTekapo Power Scheme, monitoring programme willenable GenesisEnergy to better require environmental monitoring. Establishing anenvironmental of theTekapo Power Schemedonotincludeanyconditions that The suite ofresource consents whichauthorisetheoperation 6.1 INTRODUCTION 06 ENVIRONMENTAL MONITORING es onthe lakeshore that exhibit erosion show evidence e isnoindication thatinundationhasthreatened the o thewater level regime since 1954have initiated ology &morphology oftheTekapo River. e Tekapo Shoreline; ater quality(includingtheTekapo River andtheTekapo during FIGURE The sit Ther Changes t Hydr W Aquatic ec The Lak that thepr int Ne these changesisc prior t changes t Canal); and

the

o theshore atelevations thatwere probably stable Photographing ology oftheTekapo River anditstributaries; ocess, althoughon-going,occurs intermittently

September

onsistent withothercontrolled lakes inthe

2013

the

fieldwork.

eastern

shoreline

Lake

Tekapo

survey (25November 2013). a driftdive to count adulttrout wascarried outduringthespring the Tekapo Canal)are abarrierto fishpassage (Figure 11),and the Maryburn,IrishmanCreek andFork Stream culverts (beneath fish survey wasalsoundertaken inApril2013 to assess whether were surveyed inspring(November) andautumn(April)2013.A tributaries (PukakiRiver, Maryburn,Grays River andFork Stream) the Tekapo River andfour sites inthelower reaches ofthemajor the TekPS onaquaticecology, eightsites onthemainstem of 2014). To assess the ecological communities andinfluence of was completed duringthereporting period(Freshwater Solutions, The aquaticecology study oftheTekapo River anditstributaries AND ITSTRIBUTARIES 6.3 AQUATIC ECOLOGY OFTHETEKAPORIVER onstructed) thatrequire erosion mitigationwork. osion, oranysites (excluding thosewhere revetments have e nosites around thelake thatare indicative ofhazardous ekapo associated withtheoperation oftheTekapo Power juvenile longfin eeland onelarge ( previously beenrecorded intheUpperWaitaki catchment. One All ofthefishspecies recorded duringthe two surveys have during thesurveys andconfirm the relatively low number of ely thatthechangeinrange ofwater level ofLake Godl FIGURE T FIGURE ekapo It islik been c er ar Scheme hasinitiat T winds gener and isr ey

Peaks Canal

10 11 elated to periodsofhighwater levels withstrong

// //

A Electric Road. culvert.

ating erosive waves. section

fishing ed active erosion to theshore, butthere

hard

Maryburn

rock

shore 5 kg) longfin eel were recorded

Stream,

the

upstream northern

end of

the

15 ENVIRONMENTAL REPORT // 14 16 TEKAPO // 14 (Pattle Delamore Partners Ltd,2013b). morphology study report wasfinalised duringthe reporting period monitoring programme. TheTekapo River hydrology and therefore wasselected asakey component oftheenvironmental River catchment to thismodification isnot well understood, and response ofsurface water andgroundwater withintheTekapo (Figure 12)are bothmodifiedbytheoperation ofthe TekPS. The The hydrology andmorphology (i.e.shape)oftheTekapo River ect ofspillingfrom Lake Tekapo into theTekapo River 6.5 HYDROLOGY ekapo River dueto lower flow, andwater qualitydue o less water beingavailable to dilute contaminants entering ally very good.TheGrays River shows thehighest levels w effects ofland-usechangesintheupperMackenzie ensification, andthisis reflected inthe low levels of The key findingsofthewater quality study were: reporting period(Pattle Delamore Partners Ltd,2013a). outlining theresults ofthewater qualitystudy wasfinalisedinthis the TekPS from awater qualitymonitoring perspective. Thereport better understanding ofthewater qualityoftheTekapo River and A fieldvisitwas carried outon16May2013,inorder to gaina reporting period. monitoring work whichwascommissioned intheprevious therefore forms anotherkey component oftheenvironmental intensification withinthe catchment infuture. Water quality Tekapo River catchment, andthere isthepotential for further however more intensive land usedoesexist withinthe Lake Tekapo are largely unaffected bylanduseintensification, The Lake Tekapo water isofavery highquality. Themargins of 6.4 WATER QUALITY autumn survey. result ofasignificant increase indidymo cover andbiomass inthe community index (QMCI)scores between thetwo surveys asa (caddisflies) (EPT)abundance andquantitative macroinvertebrate ephemeroptera (mayflies),plecoptera (stoneflies) andtrichoptera findings andtheof research into didymo,withadeclinein autumn were consistent withEnvironment Canterbury survey The benthicinvertebrate community survey results inspringand the autumnandspringsurveys undertaken aspartofthisstudy. In-stream andriparianhabitat remained broadly similarbetween in thelower Tekapo River inbothsurveys. upper Tekapo River inautumn,while common bully were recorded galaxias were recorded inthelower Tekapo River inspringandthe ability ofthesespeciesto exploit arange ofhabitat types.Alpine abundant speciesrecorded duringthesurveys, reflecting the galaxias anduplandbullieswere themost widespread and recorded atanyofthesites. Juvenile brown trout, Canterbury the lower Tekapo River butnothreatened pencilgalaxiidswere longfin eelspresent inthe Tekapo River. Koaro were recorded in ekapo River generally haslow total suspendedsolids ersion of water from Lake Tekapo to Lake Pukaki ater quality intheTekapo River anditstributaries is e Benmore isrecognised asthelake thatismost likely to atchment feeding most oftheflow into Lake Tekapo The T The div W Lak The c has ondo the eff and turbidity,ho on periphyt via small t the T (via theT phosphor of enrichment,indic gener the upperMack Basin bec sho nutrient enrichmentinLak int is dominat ekapo Canal)willbeaffecting water temperature in er streams. Thereduced flow mayalsohave impacts ous concentrations. wnstream water clarityandsedimenttransport. ause itreceives allthedrainage andrun-offfrom ed byalpineareas unaffected byanyland-use on production andotherstream processes. enzie Basin. wever itisnot clear from available data what ated byconductivity anddissolved reactive e Tekapo.

er flows; and esponds rapidly to rainfall events andchangesinsurface avels neartherivers whichishighly permeable and groundwater systems exist withintheTekapo andTwizel basins: direction, parallel to theriver. Cooksey (2008)suggested two Tekapo Basingenerally flows inasouth to south-westerly Data from previous studies indicates thatgroundwater inthe environmental monitoring needsfor theTekPS. in thesynopticstudy reports inorder to determine thefuture detailed review oftheresults andrecommendations included In thenext reporting period,GenesisEnergy willconduct a efore likely linked to large, catchment-wide rainfall events. 6.6 FUTUREENVIRONMENTAL MONITORING REQUIREMENTS oncurrently withincreased flows inthetributaries. Itis eek, follow asimilarpattern oflosing water intheupper onfluence. TheGrays River anditstributaries, andIrishman oundwater before gainingwater againneartheGrays River Other key findingsofthehydrology study were: understanding oftheeffect ofspillevents from Gate 16. losses along theriver’s length. Thisdata willinturnprovide an during thereporting periodto helpcharacterise flow gainsand Grays River. Flow gaugingsintheTekapo River were undertaken main onesbeingFork Stream, MaryBurn,IrishmanCreek andthe vents andchangesinsurface water flows. The Tekapo River receives flow from a numberoftributaries, the oundwater system, mainly inclean gravel lenses ow groundwater system inthepost glacialalluvial wn theTekapo River generally appears to coincide ed information exists relating to theTekapo River bed FIGURE A deepgr A shall Spill do Limit It issugges wat r gr ther c with highergr morphol basin andgainingwat Cr c gr e and lay

12 ers, whichdoesnothave aclear response to rainfall

ogy orbedload sediment. //

The ted thattheTekapo River loses water to oundwater levels, however, thistends to occur

mid-reaches

er intheirlower reaches.

the

Tekapo

River,

looking

north.

TEKAPO REMEDIATION PROJECT

CANAL

07 17 ENVIRONMENTAL REPORT // 14 18 TEKAPO // 14 managed. TheConstruction ManagementSite wasalsowhere of workshops andsite offices from where the canal project was A Power Station. TheConstruction ManagementSite consisted situated approximately 8kmdown theTekapo Canalfrom Tekapo Management Site onaparcel oflandowned byGenesisEnergy, and repair works project byfirst establishing aConstruction In September 2012,GenesisEnergy commenced there-lining 7.1.1 CONSTRUCTION MANAGEMENT SITE Tech, Fulton HoganandTaylors Earthmoving withdesignbyURS. contractors. Theprimarycontractors for theproject includedCarpi of GenesisEnergy staff andinternational, nationalandlocal the two construction seasonsto complete theworks, consisting Up to 185workers were onthe construction site duringeachof for details ontheseworks. 2012/2013 Tekapo Power SchemeAnnualEnvironmental Report to theMaryburnFillsectionofcanal (Figure 13).Refer to the the SH8Bridgethatcross over thecanal, andmake improvements undertook seismicstrengthening ofthethree farm bridgesand the opportunityto make somerepairs to thecanal embankments, During thefirst construction season,GenesisEnergy also took was 6.3km. over two construction seasons.Thetotal length ofcanal repaired for manyyears. Three sectionsoftheTekapo Canalwere repaired PVC material thatwillwithstand various pressures andsunlight with acanal linerimported from Europe. Thelinerisaspecialised Genesis Energy’s solutionwasto re-line sectionsofthecanal leaks haddeteriorated inrecent years requiring remedial action. for manyyears and,inplaces, since itwasbuilt.Someofthese leakage from theTekapo Canal.Thecanal hadbeenknown to leak June 2011,preparations were madeto develop asolutionto repair When GenesisEnergy purchased theTekapo Power Schemein 7.1 OVERVIEW 07 TEKAPOCANAL REMEDIATION PROJECT FIGURE

The

Tekapo

Canal

Remediation

Project

repair

locations. outage completed 15daysaheadof schedule (Figure 15). successfully repaired, attheMaryburnFillembankmentwith (season two), athird 1.8kmsectionoftheTekapo Canalwas Canal (GenesisEnergy Ltd.2013).Duringthesummerof2014 successfully completed repair works to two sectionsoftheTekapo During thesummerof2013(seasonone),GenesisEnergy 7.1.2 INTERNALCANAL REPAIR WORKS excavated from borrow pits(Figure 14). a large proportion oftheaggregate usedfor theproject was Remediation FIGURE

Project. Construction

Management

Site

for

the

Tekapo

Canal

the summerof2014(Figure 16a–b). allow for thedewatering ofthecanal sectionto berepaired during in theTekapo Canal,sothatthecoffer damscould beinstalled to Maryburn Fillsection.GenesisEnergy stopped theflow ofwater On 7January2014,seasontwo works commenced onthe able to bepumpedaround thecoffer dams. the re-lining seasonastheentire flow ofthe canal water wasnot consequence, theflow inthe canal was stopped for theduration of sections ofthecanal where repair wasnotrequired. Asa dams (coffer dams)andpumpingthewater outinto theadjacent of thecanal wasemptiedofwater bycreating two temporary To laythelinerin Tekapo Canal,theMaryburnFillsection FIGURE c FIGURE ompleted

16 15

cofferdam. // A

& The

// Maryburn

Cofferdam

Fill

installation

embankment.

taking

place

and

during theoutage. water off-takes from theTekapo Canalwere able to bemaintained Canal (Figure 17).Thismeantthatexisting irrigationandstock continued to supply water from Lake George Scott into theTekapo minimal flows downstream, anda temporary siphonsystem which section wasmanagedviaby-pass pumpsandpipingto allow The water level inthesectionsofcanal adjacent to thede-watered this sectionofthecanal into theadjacent sectionsofthecanal. and over thecourse ofsixdays,thewater waspumpedoutfrom pumps were deployed into theisolated 1.8kmsectionofcanal, stability, de-watering oftheisolated canal sectionbegan.Large Once thetwo coffer damswere installed, andhadbeentested for pressure tested to ensure acontinuous leak-free liner. continuous double welded seam (Figure 19).Eachseam wasthen equipment whichheated thelinermaterial to 200ºCto form a liner edgeswere then welded together withspecialisedwelding bank ofthecanal, androlled down to thebaseofcanal. The company CarpiTech. Therolls of linerwere deployed from the The specialisedPVC liner isproduced inItaly andSpain,bythe base course, priorto thespecialisedPVC linerbeinglaid. surface hadbeencleared andrepaired, aggregate wasoverlain asa original earthlinerofthecanal (Figure 18).Once theexisting canal commenced removal ofweed andloose material sittingontop ofthe As soonasthesectionofcanal hadbeende-watered, machinery The fishsalvage operation isdescribedinSection7.3.3. During thede-watering process, afishsalvage operation occurred. of FIGURE Geor FIGURE

PVC ge

liner.

Scott.

18 17

// //

Original Temporary

The

pipe

earth

work

bypass

liner

brings

siphon

material

water

system

over being

the installed

prepared

embankment.

for

Lake

laying

19 ENVIRONMENTAL REPORT // 14 20 TEKAPO // 14 Canal RemediationProject. February 2014,markingthesuccessful conclusion oftheTekapo two cofferdams, thecanal wasbrought backinto service on26 empty sectionofcanal (Figure 21).Following theremoval ofthe lining andtheballast waslaid,water waspumpedbackinto the When theMaryburnFillsectionofcanal hadundergone re- conveyor beltsystem called the‘juggernaut’(Figure 20). was transported to thebaseofcanal byacustom-made place once thecanal wasre-filled withwater. Theballast material The ballast material wasutilisedto anchorthelinermaterial in the sidesofcanal inpreparation for therock ballast material. protection layer wasputover thelineratbottom andtop halfof Once sectionsofthelinerwere welded together, ageotextile mat FIGURE FIGURE erial

20 19

// // the

Welding The

bottom

‘juggernaut’

equipment

the

canal.

action, joining

conveying

sections

rock

liner

ballast

together.

SMPs are summarised inTable 10. external canal works, were alsodeveloped. TheTekapo Canal of theConstruction ManagementSite, andfor theinternal and applicable SMPs associated withtheestablishment andoperation for theInternal andExternal works atthecanal. Thevarious operation oftheConstruction ManagementSite andtheother Canal RemediationWorks; onefor theestablishment and Genesis Energy developed two separate EMPs for theTekapo and against theEMPs andSMPs. Remediation project wasassessed against itsresource consents the project. GenesisEnergy’s compliance for theTekapo Canal is implemented for specific locations oractivities forming partof SMPs were prepared to ensure asuitable level ofmanagement action requirements for theproject. Inadditionto theEMPs, and asystem ofmonitoring, reporting, auditing,andcorrective practical managementactions,performance requirements, The EMPs identified roles and responsibilities andincluded environmental effects whicharisefrom theremediation activities. management framework to enable themanagementof Genesis Energy’s resource consents. TheEMPisanoverarching Management Plans(SMPs) were developed inaccordance with Environmental ManagementPlans(EMPs) andSupplementary associated withtherepair works to take place. District Council.Theseconsents allowed for thevarious activities which were soughtfrom Environment Canterbury andMackenzie consents associated withtheTekapo CanalRemediationProject, Genesis Energy appliedfor, andwasgranted atotal of39resource 7.2 RESOURCECONSENTS Communications ManagementPlan Rehabilitation ManagementPlan Archaeological Discovery Protocol Management Plan Stormwater, SedimentandErosion Control Contaminant SpillContingency Plan Lighting ManagementPlan Traffic ManagementPlan Noise ManagementPlan Dust ManagementPlan Fish Salvage ManagementPlan Ground andSurface Water Monitoring Plan Water QualityManagementPlan Refer to Section: Supplementary Environmental ManagementPlan FIGURE TABLE De veloped

and //

Supplementary

Removal

Implemented

cofferdam. Environmental

for

the

Tekapo

Management

Canal

Remediation

Plans

Project. 7.3.11 7.3.10 7.3.9 7.3.8 7.3.7 7.3.6 7.3.5 7.3.4 7.3.3 7.3.2 7.3.1 7.4 on-set ofstratification (Figure 23). canal outage andinitially operated five daysa week to prevent the monitoring buoy installation, andwasactivated attheonsetof was alsoinstalled intheheadpondat sametimeasthe Season 1canal outage (Kelly &Barter, 2013),aeration equipment Based onobserved declinesinDOthatoccurred duringthe accumulation ofdetritusonthebaseheadpond(Kelly, 2012). outage would first develop intheheadponddue to itsdepth,and monitoring asanywater qualityissues associated withthecanal pond hadpreviously beenidentifiedastheappropriate site for temperature atdepthsof1mand15intheheadpond.The buoy measured Dissolved Oxygen(DO)atadepthof15m,and commenced (7January2014)(Figure 22).Themonitoring above Tekapo BPower Station onthedaythatcanal outage A water qualitymonitoring buoy wasinstalled intheheadpond pre-determined water qualityparameters were exceeded. intervention mechanismsthatwere required to beimplemented if remediation works. TheWater QualitySMPalsodetails the Canal wasmaintained to anacceptable level duringthecanal monitoring required to ensure water qualitywithintheTekapo Genesis Energy’s Water QualitySMP(Kelly, 2012)details the 7.3.1 TEKAPOCANAL WATER QUALITYMANAGEMENT 7.3 ENVIRONMENTAL MANAGEMENT project have beenreached. and MDCare satisfiedthatthe rehabilitation milestones ofthe surrendered inthecoming months,once Environment Canterbury been completed. Theremainder ofresource consents willbe to aspectsoftheTekapo CanalRemediationProject whichhad resource consents whichwere nolonger required as they related During thereporting period,GenesisEnergy surrendered 18 for itsTekapo CanalRemediationProject resource consents. pleasing result of‘fullcompliance’ from Environment Canterbury the reporting period.To date, GenesisEnergy hasbeengiven a inspections ontheTekapo CanalRemediationProject during Environment Canterbury carried outatotal offour compliance B FIGURE

Power

Station

Water

headpond

quality

(photo: monitoring

Dave

buoy

Kelly).

deployed

the

Tekapo

DO subsequently increasing to greater than80%saturation. temperatures resulted inthewater column effectively mixingand combination ofaeration, penstock water releases, andcooler air releases ofupto 5m of upstream canal water to thedownstream section,andwater water andincrease DO,includingintermittent bypass pumping Further intervention actionwastaken to mixtheheadpond caused DOlevels to trend downwards, reaching 53%saturation. that reduced mixingto deeperwater intheheadpond,and warming ofthesurface waters andtheformation ofathermocline and calm period,commencing 27January2014resulted inthe of thecanal outage, however theonsetofaparticularly warm The water column remained well mixed over thefirst 20days for theremainder oftheTekapo Canaloutage (Figure 24). well mixed, and DO concentrations were greater than 80% saturation exchange andmixingintheheadpond.Thepondremained through theTekapo Bpenstocks were madeto promote water continuously operated andfurtherintermittent releases ofwater Following thelower DOlevels, theaeration equipmentwas headpond FIGURE Remediation T and FIGURE ekapo

Dissolved

Canal

23 24

(Photo:

// //

project

Bubble Temperature

headpond Oxygen

Fulton 3 /s through theTekapo Bpenstocks. The

(Kelly, line

levels

during

Hogan). in

2014). operation

measured

measured season

aerate at of

1 the

15 m

Tekapo and the m

depth

Tekapo 15

m Canal

depths,

the B

21 ENVIRONMENTAL REPORT // 14 22 TEKAPO // 14 Annual Environmental Report for theTekPS. the coming year willbereported inGenesis Energy’s 2014/2015 the Tekapo Canal.Theresults ofmonitoring undertaken over understanding of the ground andsurface water interactions along Monitoring willcontinue untilApril2015,to gainalonger-term be minorcompared to themuchlarger natural variations. and surface water levels inproximity to theTekapo Canalappearto of reduced leakage from theTekapo Canalonnatural groundwater 2014, Pattle Delamore Partners Ltd.(2014)conclude thattheeffect Based onthemonitoring data collected between May2013andApril are minorcompared to thenatural variability thatoccurs. contribution ofcanal leakage to ground andsurface water levels to rainfall andseasonalfluctuations. Thissuggests thatthe surrounding ground andsurface water resources, whichrespond However, thereduced flows donotappear to have affected the the installation oflineratthissectiontheTekapo Canal. section (re-lined duringseason1)appearto have reduced since The flows monitored from seepsand weirs along theSH8 canal summer months)thananyoftheconstruction activities. fluctuations (generally higherinwinter monthsand lowest during water levels appearto bemore influenced by rainfall andseasonal be less thanminor. Observed fluctuationsinground andsurface works ongroundwater levels orsurface water levels appearto results collected to date suggest thattheeffect ofthere-lining monitoring undertaken between May2013andApril2014.The Pattle Delamore Partners (2014)describetheresults of Report for theTekPS. summarised inGenesisEnergy’s 2012/2013AnnualEnvironmental Delamore Partners (2013c)annualmonitoring report andare also between October 2012andApril2013are provided inPattle Delamore Partners (2012).Resultsfor monitoring undertaken commenced, asperthemonitoring programme prepared byPattle In October 2012,ground andsurface water monitoring xternal embankmentsoftheTekapo Canal,and; ee de-watered sectionsoftheTekapo Canal; programme includesmeasurements of: the re-lining ofsectionstheTekapo Canal.Themonitoring fluctuations to determine ifanychanges can beattributable to monitoring programme isto measure ground andsurface water The purposeofGenesisEnergy’s groundwater andsurface water Project inthevicinityofremediation works. levels priorto, during,andafter theTekapo CanalRemediation Energy isactively monitoring groundwater andsurface water understood. To better understand thisrelationship, Genesis bodies andinto thesurrounding groundwater system isnotwell of leakage from theTekapo Canalto adjacent surface water be accurately calculated, andtherefore therelative contribution area, thequantityofleakage from theTekapo Canalisnotable to Due to thecomplex ground andsurface water interactions inthe 7.3.2 GROUNDANDSURFACE WATER MONITORING Salmon Farm (Kelly, 2014). issues upstream oftheTekapo BheadpondorMountCookAlpine the season2canal outage periodandidentifiednowater quality recorded dissolved oxygen andtemperature for theremainder of upstream ofMountCookAlpineSalmonFarm. Thetransducer upstream oftheTekapo Bheadpond.Atransducer wasinstalled Genesis Energy alsoundertook furtherwater qualitymonitoring ows from weirs adjacent to theTekapo Canal. w inthree streams whichpass undertheTekapo Canal er levels ofponds(oldborrow pits)adjacent to the oundwater levels from sixpiezometers installed adjacent to Fl Changes inl The flo The wat Gr e within the SH8 and Maryburn Fill sections of the Tekapo Canal; SH8 andMaryburnFillsectionsoftheT the thr eakage pointobservations (seeps)from the ekapo Canal;

of Conservation for theirwork andsupport. Cawthron Institute, NgãiTahu, FishandGametheDepartment there were very few fishmortalities. GenesisEnergy thanks strategic, well-planned andwell executed fishsalvage meant The comparatively lower airtemperatures, combined withthe catchment (Gabrielsson &Doehring,2014). were alsosalvaged andtransferred to otherwaterbodies inthe koaro (Figure 26)andfour large long-finned eels(Figure 27) Over 7000native fishincludinguplandbullies, common bullies, exceeded 14kg. watered. Thelargest fishsalvaged were two salmonidsthatboth relocated to theadjacent sectionsofthecanal whichremained the Tekapo Canalthat wasbeingre-lined. Thesalvaged fish were brown trout and rainbow trout) were salvaged from thesectionof (Figure 25).Atotal of635salmonids(includingChinooksalmon, South IslandFishandGametheDepartmentofConservation with theassistance oftheCawthron Institute, NgãiTahu, Central A fishsalvage operation took place atthebeginningofseasontwo, 2,500 smaller native fish were salvaged. Canal thatwere de-watered. Atotal of831salmonids andabout salvage operation took place withinbothsectionsoftheTekapo Tekapo Bheadpond area. Atthebeginningofseasonone,afish regularly catch salmonandlarge trout, particularly around the The Tekapo Canalprovides anglers withtheopportunityto 7.3.3 FISHSALVAGE FIGURE FIGURE (phot a

dewatered o:

Cawthron

26 25

// //

section

The A

Koraro

salmonid Institute).

the salvaged

Tekapo

fish

salvage

from

Canal

the

team

(Photo:

Tekapo

working

Cawthron

Canal

their

Institute).

way

down

2, nofurthernoise monitoring wasundertaken. time. Asthere wasnofurtheraggregate production duringseason the project atGenesisEnergy property boundaries duringthis issues were detected with thelevels ofnoisebeinggenerated from basis thereafter untilthecompletion oftheseason1works. No potentially significant noise-generating activity,andona weekly land uponthecommencement ofaggregate processing, a measurements were taken onthe boundaryofGenesisEnergy During theseason1construction programme, noise residents atneighbouring dwellings. works could belargely undertaken withoutnoiseeffects on remote location oftheTekapo Canalmeantthattheconstruction the potential to generate significant noise effects. Fortunately the The canal repairs involve the use of machinery and equipment with 7.3.5 NOISEMANAGEMENT reporting period. to dust duringtheTekapo CanalRemediationProject over the No complaints orcompliance issues were raised withrespect be reached bythewater carts, to keep dust-prone surfaces damp. K-line irrigationsystems were alsosetupinareas thatcould not construction road surfaces adequately watered to control dust. machinery, upto four water carts were usedatatime,to keep the During dryconditions where dust waseasily mobilisedby required ontheconstruction site. observations, were usedto inform thedegree ofdust control recorded windspeed.Thesetools, inconjunction withvisual an anemometer installed attheConstruction ManagementSite The construction team received daily weather forecasts, and Remediation Project. potential mobilisationofdust carefully duringtheTekapo Canal particularly duringsummer,GenesisEnergy hadto managethe Due to thedry,windyclimate typical oftheMackenzie Basin, 7.3.4 DUSTMANAGEMENT fr FIGURE om

the

Tekapo

One

Canal

the

four

Ngãi

large

Tahu

eels

(photo:

salvaged

Cawthron

and

transferred

Institute).

reported thatthey were satisfiedwiththe response. removed and disposedofappropriately. Environment Canterbury compliance officer, the contaminated soilwasimmediately to land.Uponnotification ofthisbyanEnvironment Canterbury Construction ManagementSite, upto two litres ofdieselwasspilt Upon removal ofthedieselstorage tank located onthe time oftheincident. appropriately, andEnvironment Canterbury wasinformed atthe Plan, thespillwasimmediately cleaned upanddisposedof required underGenesisEnergy’s Contaminant SpillContingency burst hydraulic hoseonapiece ofconstruction machinery. Asis Up to 1.5litres ofhydraulic oilwasspiltto landfollowing a minor amountsofhydrocarbon were spiltto land. contaminants were spiltto water. There were two instances where During thereporting period,there were noinstances where substances beingspilled. the processes to beimplemented intheevent ofanythese and usedduringtheTekapo CanalRemediationProject, and the potentially hazardous substances thatwillbestored on-site Genesis Energy’s Contaminant SpillContingencyPlandescribes 7.3.8 CONTAMINANT SPILLCONTINGENCY MANAGEMENT for anylighting,except for asmallamountofsecuritylighting. were undertaken duringthehours ofdaylight,negatingtheneed During season2,TheTekapo CanalRemediationProject works on MountJohnObservatory’s operations. special nightskyenvironment andto avoid lighting-related effects the hours ofdarkness, lightingrestrictions existed to protect the Remediation Project allowed for activitiesto beundertaken during While GenesisEnergy’s resource consents for theTekapo Canal world-class stargazing location. Tekapo township, recognises theregion’s uniqueattraction asa Mackenzie International DarkSkyReserve, whichincludesLake International DarkSkyReserve. Thecreation oftheAoraki In 2012,theMackenzie Basinwasofficially designated asan 7.3.7 LIGHTINGMANAGEMENT to reflect changesinactivitiesandsafety requirements. processes. TheTraffic ManagementPlans were regularly updated directions, signagerequirements andincidentmanagement site, andstipulated site-specific speed restrictions, traffic flow Traffic ManagementPlans were putinplace for the construction measures wasexcellent. adherence bythepublicto reduced speedlimitsandtraffic control Zealand Transport Agency. Noincidentsoccurred, andingeneral, utilised around theSH8bridgewere approved bytheNew ‘stop/go’ traffic control personnel. Thetraffic control measures were required to adhere to reduced speedlimitsaswell as SH8, aswell asprivate vehicles crossing over theSH8bridge, highway crosses theTekapo Canal.Construction vehicles crossing Traffic managementwas required attheSH8bridgewhere the construction site. areas, aswell asto protect contractors andemployees withinthe protect thepublicfrom construction vehicles moving inpublic However, careful traffic managementwas required both to site, whichwasnotaccessible to thepublicfor safety reasons. Canal RemediationProject were contained withintheconstruction Most construction traffic movements associated withthe Tekapo 7.3.6 TRAFFICMANAGEMENT reporting period. to noiseduringtheTekapo CanalRemediationproject over the No complaints orcompliance issues were raised withrespect

23 ENVIRONMENTAL REPORT // 14 24 TEKAPO // 14 encountered. During thereporting period,noarchaeological discoveries were required to comply withit. All contractors on-site were madeaware oftheprotocol andwere a discovery while working ontheTekapo CanalRemediationSite. procedure thatmust beadhered to byanyperson whomakes such the typesofartefacts thatmightbeuncovered, andoutlinedthe developed withtheassistance ofNgãiTahu. TheProtocol detailed project, anAccidental Archaeological Discovery Protocol was Prior to thecommencement oftheTekapo CanalRemediation the opportunityto investigate thediscovery. Places Trust and/ortherelevant Iwiauthorityhave beenprovided the discovery must not be disturbed until the New Zealand Historic must bereported to theNew ZealandHistoric Places Trust, and human remains maybeuncovered. Bylaw,anysuchdiscoveries Maori orearly-European artefacts, evidence ofoccupation, or excavation below theground surface, there isthepossibility that As withmanyconstruction projects inNew Zealandinvolving 7.3.10 ARCHAEOLOGICAL DISCOVERY MANAGEMENT being installed. as measured directly downstream ofwhere thecofferdams were The maximumlevel ofTSS sampled inthecanal was96.75mg/L acceptable limitof100mg/LadvisedbyEnvironment Canterbury. that Total SuspendedSolids(TSS) levels were below themaximum vicinity ofeachcofferdam. However, water qualitytesting revealed fine sedimentwhichcreated aplumeofdiscoloured water inthe cofferdams inthecanal resulted intheshort-term suspensionof As wasexpected, theinstallation andremoval ofthetwo re-vegetation ofdisturbed areas willbecomplete bySpring2014. were disturbed have now beenre-seeded, anditisexpected that occurring off-site, particularly duringrainfall events. Allareas that were regularly checked to ensure nomovement ofsedimentwas stabilised bycompaction, andinsomecases byhydro-seeding, and Bare earthsurfaces created duringtheseason2works were resulting from theworks. were noinstances ofearthmovement beyond theconstruction site Sediment control devices andpractices performed well, andthere from active areas, suchasbelow theMaryburnFill(Figure 28). Sediment retention areas were constructed to contain runoff around water. that can becaused duringintensive rainfall andearthworks inand to minimisethepotential adverse effects ofsedimentmovement Remediation Project meanscareful managementwasrequired The scale ofearthworks associated withtheTekapo Canal CONTROL MANAGEMENT 7.3.9 STORMWATER, SEDIMENTANDEROSION Maryburn FIGURE

Fill

Sediment

section

retention

the

canal

device

(photo:

installed

Fulton

Hogan).

below

the

to theTekapo Canal RemediationProject. phone linewassetupto receive enquiries from thepublicrelated meetings, signageandwebsites. Ane-mailaddress and toll-free including newspaper advertorials andmediareleases, public used to circulate information andupdates relating to theproject, Tekapo CanalRemediationProject. Avariety ofmechanismswere stakeholders andthepublicwell informed priorto, andduringthe Genesis Energy hasendeavoured to keep itsneighbours, iwi, 7.4 COMMUNICATION Plan, asapproved byECancompliance officers. stipulated intheTekapo CanalRemediationProject Rehabilitation acceptable level ofvegetation establishment hasbeenachieved as 30). Monitoring andweed managementwillcontinue untilan with aseedmixcontaining speciescommon to thearea (Figure Remediation Project have now beenstabilised andre-vegetated All bare earthsurfaces thatwere formed during theTekapo Canal landscape (Figure 29). the aggregate borrow pitswere contoured to thesurrounding with fillmaterial. Depressions left intheground surface from The rehabilitation involved backfillingtheaggregate borrow pits enduring effects onthelandscape from theconstruction project. disturbed areas were rehabilitated to ensure there are no Upon completion oftheTekapo CanalRemediationProject, 7.3.11 REHABILITATION Management FIGURE FIGURE season

one

29 30

// //

canal

Rehabilitated Site. A

re-vegetated

remediation

borrow

embankment

works.

pits

located

the

canal

the

Construction

following

displayed byCarpiTech, Fulton Hogan,andTaylors Earthmoving. Project. GenesisEnergy greatly appreciates thehighstandards to thesuccessful conclusion oftheTekapo CanalRemediation Remediation Project hasalsobeenasignificant contributing factor Energy’s primarycontractors working ontheTekapo Canal The high level of environmental responsibility displayed by Genesis forward to working closely withourstakeholders inthefuture. Tekapo community, andinterested parties.GenesisEnergy looks opportunity to engagewith,andfurthergetto know theLake stakeholders, andinterested parties.Ithasbeenafantastic and implementation from theLake Tekapo community, Iwi, received duringtheTekapo CanalRemediationProject planning Genesis Energy isextremely grateful for thesupportithas 7.6ACKNOWLEDGEMENTS level below theMaximumControl Limit. average rainfall whichenabled GenesisEnergy to control thelake The periodofhighinflows wasimmediately followed byaperiodof returned to service. lake level below maximumcontrol level untiltheTekapo Canal spill event wasinitiated down theTekapo River to maintain the pushing thelake towards themaximumcontrol level. Acontrolled Project meantthatLake Tekapo levels rose two metres in20days, which coincided withthestart oftheTekapo CanalRemediation after theoutage commenced. Highinflows duringearly January, into theTekapo River would occur between sixandeightweeks Based onhistorical data, GenesisEnergy expected thatspill Tekapo atthestart ofthecanal outage. level ofLake Tekapo andalsoonthevolume ofinflows into Lake spill into theTekapo River commenced, wasdependentonthe of timebetween whenthecanal outage commenced, andwhen controlled spillofwater occurred into theTekapo River. Theperiod the lake reached itsmaximumcontrol level. Atthatpointa During theoutage thelevel ofLake Tekapo rose untileventually lowered to asclose to itsminimumoperational level aspossible. outage associated withthecanal repair works, Lake Tekapo was Tekapo BPower Stations were notoperational. Priorto thecanal into theTekapo Canalfrom Lake Tekapo, andbothTekapo Aand Canal to berepaired wasde-watered, nonew water could flow While remediation works occurred andthesectionofTekapo 7.5 LAKETEKAPOLEVELSANDRIVERSPILL

25 ENVIRONMENTAL REPORT // 14 26 TEKAPO // 14 08 OUTCOMES SCHEME-WIDE weasels, hedgehogs,possums andrats usingtraps andtoxins this season(Figure 32).Removal offeral cats, ferrets, stoats, improve breeding outcomes ofblackfronted terns hascontinued PRR’s success withintensive predator work intheOhauRiver to Tasman, Lower Ohau,Ahuriri,Forks andupperTekapo Rivers. willows, lupins,andothertarget weeds intheGodley, Cass, person hours were spentbycontractors andPRRstaff removing weeds atlow densitiesatstrategically important sites. Over 3800 preventing theestablishment ofnew weed incursions andkeeping quality for arange ofbraided river plantsandanimals by This year PRR’s core focus continues to bemaintaining habitat understanding of braided river ecosystems. rivers andassociated wetlands, andbuildingknowledge and predator control, increasing publicawareness ofbraided include theremoval ofweeds, exploring wetland protection, years. Key objectives ofPRRduring thecurrent Strategic Plan PRR operates underaStrategic Planthatisupdated every seven and wetland ecosystems intheupperWaitaki basin. and enhancinghabitat andecological communities inriver beds, management andresearch programme focussed onmaintaining a compensatory agreement. Thefocus ofPRRisanecological funded byMeridianEnergy (87%)andGenesisEnergy (13%)under rivers andwetland ecosystems intheupperWaitaki Basin.PRRis programme established in1990thataimsto protect orrestore Project River Recovery (PRR)isaDepartmentofConservation CONSERVATION 8.2 PROJECT RIVERRECOVERY –DEPARTMENT OF attended thefieldvisitand for the learning opportunities. future. We are very grateful to theRunangarepresentatives who and GenesisEnergy identifyopportunitiesto work together inthe data collected willinform theassessment andhelptheRunanga Tekapo Canal(Figure 31).Anumberofsites were visited andthe River, Tekapo Canalandthetributaries that pass underthe Tekapo Power Scheme,includingLake Tekapo andtheTekapo The initialfield work was completed withinthe extent ofthe may potentially beimpacted bytheactivitiesofGenesisEnergy. identifying specificcultural values, interests andassociations that the area around theTekapo Power Scheme.Thestudy includes to buildontheunderstanding ofthecultural significance of have, inpartnership withGenesisEnergy, embarked onaproject o Arowhenua, Te RunangaoWaihao andTe RunangaoMoeraki of theWaitaki. Asrepresentatives ofmanawhenua,Te Runanga areas andoceans around Te Wai Pounamu, includingthewaters Ngãi Tahu hasalong association withthewaterways, coastal 8.1 CULTURAL HEALTH ASSESSMENT 08 SCHEME-WIDEOUTCOMES health FIGURE

assessment

Runanga

the

representatives

Lake

Alexandrina

carrying

outlet

out

creek.

cultural

continue to beremoved eachyear. Thisseasonwrybill in theriverbed since 2006andlarge numbers ofpredators ongoing. Over 1000killandlive capture traps have beendeployed funded byPRRandthekaki/blackstilt recovery programme isalso Catchment scale predator trapping intheTasman River jointly was againhighwithgoodnumbers ofnests fledging chicks. hatching success and63%fledgingsuccess andwrybillproductivity highest recorded since theproject commenced in2005with78% the riverbed. Thisseasonblackfronted tern productivity wasthe programme wascarried outto remove blackbacked gullsfrom and eggpredation byblackbacked gullslast year, acontrol rates for terns inprevious years. Following confirmation ofchick activated cameras placed attern nests following highmortality 33) andblackfronted tern productivity wasmonitored andmotion evaluating theproject. changes to achieve operational efficiencies,then formally re- looking to repeat thisresult next year after makingsomeminor consecutive years recorded anywhere inthecountry. PRRwillbe best breeding results for ablackfronted tern colony over three previous years. Theseresults are encouraging andrepresent the has resulted inaneven better tern breeding seasonthanthetwo Riv FIGURE er

valley

(photo:

DOC

DOC). ranger

(Eigill)

checks

trap

the

Tasman (Figure

27 ENVIRONMENTAL REPORT // 14 28 TEKAPO // 14 takeholders. planning orstakeholder communication, andrecommended that operates interms ofeffectiveness, outcome delivery, strategic The report found noneedfor anymajorchangesto how PRR actorily outlines future actionswhile retaining ost-effective mannerwhencommissioning work and ological andotheroutcomes, andthatithasworked ina ting success ofbraided river birds; ontributes valuably to ongoingexperimental managementof unding, high quality staff and its effective management inside And theconclusions ofthestudy were that: takeholders; and ological outcomes achieved andtheoperation ort expended; trategic plan objectives; er andwetland systems; enance andenhancement ofindigenousspecies, osystems andhabitats intheupperWaitaki basinbraided objectives ofthereview were to: full independentreview ofPRR(InnesandSaunders, 2012).The and AlanSaunders from Landcare Research, whocarried outa Annual Reportwere thekey findingsofa report byJohnInnes 2013 wasreceived duringthereporting period.Includedinthe The PRRAnnualReportfor theperiod1July 2012–30June impacts andmanagementofbraided river ecosystems. resource to secondary schoolswhichexamines values, human also continues to distribute andsupportastudent/teacher field guides,information pamphlets andariver-care code. PRR braided river resource materials includingbraided river posters, awareness initiatives through distribution ofawiderange of Other ongoingwork duringthecurrent year includespublic trategic planningapproach currently usedbyPRR w sustainably andefficiently maintains low weed ermine ifPRRhasworked inacost-effective manner ovide anopinionontheefficiencyofPRRin relation to sess theeffectiveness ofPRRinmeetingthe2006-2012 ermine thedifference thatPRRwork hasmadeto the FIGURE The s PRR hasbeenv PRR no PRR hasbeenahighl Consider ho Consider ho Det Pr As Det with s managerial fle satisf incurring e c ec nes c density in63%oftheupperW the DepartmentofConserv f agency sinc the wayitdeliv s when c eff the ec s riv ec maint

33 ommissioning work andincurringexpenditure;

A xpenditure; and e itsinception dueto itssustained secure w PRRcan increase itseffectiveness orimprove w well PRRmeasures andconveys outcomes for

wrybill xibility, andallows adequate communication ers outcomes. ery resource-efficient atachieving

on y effective braided river restoration

its

nest

ation;

(photo: aitaki basinrivers, and

Philip

Guilford).

enhanced stream sections. the spawningseason(Aprilto October) to monitor trout useofthe boulders (Figure 35). Several surveys willbecarried outduring the creek bankwasnarrowed andprotected bytheplacement of constructed ontheday,andinadditionto thisaround 100mof Genesis Energy staff members (Figure 34).Around 100weirs were volunteers turnedupto helpoutonthework day,includingthree season were reinstated, andnew weirs addedasrequired. Fifteen (Saturday 29March 2014)whenweirs from theprevious spawning 2014), theLake Alexandrina Conservation Trust heldawork day After thediggergrooming work hadoccurred (25-28March concrete blocks. weirs are created byhand,usingacombination ofrocks and velocity inorder to enhance conditions for trout spawning.The last five years artificial weirs have been created toincrease flow In combination withthegrooming works atScotts Creek, inthe velocity characteristics for trout spawningneedto bemaintained. maximise thedistribution ofspawning,therightdepthand Scotts Creek hasaflow ofaround 80 litres persecond and to maintenance. Outlet Creek, completed inMarch 2011,alsorequires annual and itsquality,declines.Asimilarregravelling project onthe trout spawnonthehumpsandtotal area ofspawninghabitat, spawning. Ifthestreambed isleft too long before grooming the removes humpsandhollows created duringtheprevious season’s Since thenannualgrooming ofthestreambed withasmalldigger to reinstate around two-thirds ofthestream’s spawningarea. The lower 600mofScotts Creek wasregravelled during2005 Outlet Creek. only inflowing stream, Scotts Creek, as well asthelake’s outflow, rainbow trout fisherybyimproving spawninghabitat inthelake’s underway since the1980sto maintain andenhance thebrown and Alexandrina FisheryEnhancement Project. Thiswork hasbeen has assisted Fish&Gamewithfundingto managetheLake off theMackenzie State Highway. Since June2011,GenesisEnergy huts onitsshores andvisitsbycountless tourist anglers detouring Lake Alexandrina isasignificant trout fisherywith over 200fishing PROJECT –FISHANDGAME 8.3 LAKEALEXANDRINAFISHERYENHANCEMENT Department ofConservation for contributing to thissection. Thanks to ChrisWoolmore of theTwizel Area Office ofthe weed andmammalpest managementintheupperWaitaki basin. PRR shouldcontinue itscurrent primaryemphasesonwoody FIGURE

The

Scotts

Creek

work

day

volunteers. contributing to thissection. Thanks to MarkWebb ofCentral SouthIslandFish&Gamefor to estimate pre andpost enhancement adulttrout populationsizes. works are beingmonitored through amark-recapture programme overall benefits to anglingoftheScotts Creek andOutlet Creek wider area ofstreambed withgoodspawningcharacteristics. The successful atreducing superimpositionofspawningbyproviding a Weirs have beenbuiltfor thelast five years andhave beenhighly FIGURE FIGURE

36 //

// Boulders

Tekapo

being Canal

placed Road

public

along

access.

section

the

bank. of theTekapo Canal. Overnight camping willcontinue to beprohibited along thelength Canal. New road markingsandsignagehave alsobeeninstalled. end oftheCanalandadditionaltoilet facilities atbothendsofthe visitor experience andsafety, includingnew parkingatthePukaki The new arrangements includefeatures aimedatenhancing alternative access between Lake Tekapo to Lake Pukaki. (true left) sideoftheCanal,providing cyclists andwalkers an installed to allow access to thefulllength oftheroad onthesouth New gates andbicycle “squeeze”barriers (Figure 37)have been and must always betheCompany’s numberonepriority. Genesis Energy staff, contractors andmembers ofthepublicis significant traffic, or forhighspeedthrough-traffic. The safety of The Tekapo CanalRoad wasnever designedorintended for adjacent landholders, andMountCookAlpineSalmonemployees. cyclists, pedestrians, GenesisEnergy employees andcontractors, traffic willenhance thesafety ofthe road for recreational users, Pukaki andLake Tekapo (Figure 36).Therestriction ofthrough- Canal asanalternative to SH8whentravelling between Lake Station. However, gates prevent vehicles from usingtheTekapo Station andfor four kilometres upfrom theTekapo BPower along thecanal for seven kilometres down from Tekapo APower Recreational users ofthecanal continue to have vehicle access but nolonger allows vehicle access for through traffic. and tourists to thelower anduppersectionsoftheTekapo Canal, Canal Road(June2014)thatenables continued access for anglers Energy implemented anew traffic arrangement for the Tekapo traffic review and consultation withthe community, Genesis length oftheTekapo Canal.However, following anindependent this uniquepartofNew Zealandcan once againdosoalong the the manypeople thathave enjoyed walking,cycling andfishingin With the extensive Tekapo Canal remediation works now complete, 8.4 TEKAPOCANAL ROAD ACCESS

29 ENVIRONMENTAL REPORT // 14 30 TEKAPO // 14 removal ofthetrees from theselocations was permitted underthe Energy removed thetrees to reduce shading across theroads. The of theTekapo APower Station road. DuringJuly 2012Genesis issue for GenesisEnergy staff, contractors, visitors andusers the roads duringwinter, creating asignificant healthandsafety the road andtheTekapo Acar parkresulting inice forming on Canal along Tekapo Power HouseRoad.Thetrees were shading around Tekapo Aandalong theslope facing towards theTekapo A large numberofpinetrees were located onthehillandterraces TEKAPO APOWER STATION 8.5.3 REMOVAL ANDPLANTINGOFTREESAT staff were contacted priorto thework commencing. Island FishandGameEnvironment Canterbury compliance and CRC111768.TheDepartmentofConservation, Central South under Resource ConsentsRM030034,CRC111740, CRC111767 adjacent to theFork Stream Culvert. Theworks were carried out the accumulation ofgravel anddebristhathadaccumulated involved asmalldigger entering theriver channel andclearing upstream oftheculvert thatrunsundertheTekapo Canal.Works works to enable theclear passage ofwater inFork Stream directly During December 2013GenesisEnergy undertook maintenance 8.5.2 MAINTENANCEOFFORK STREAMCULVERT grease atbothTekapo AandTekapo B. acceptable level ofless than5milligrams perlitre (mg/L) ofoiland taken andanalysed inNovember 2013andMay2014resulted inan the discharge isanalysed for oilandgrease. Discharge samples and clear. Atsix-monthly intervals arepresentative sample of from bothinterceptors withthewater discharge remaining clean of inspectionsresult inminorquantitiesofoilbeingremoved present intheinterceptors isremoved immediately. Themajority The oilinterceptors are inspected monthly andanyhydrocarbon inspection oftheoilinterceptors atTekapo AandBPower Stations. Resource consents CRC950297.2andCRC950298.2require avisual 8.5.1 OILINTERCEPTOR INSPECTIONS below. were undertaken around theTekPS; eachactivityisdescribed During thereporting period,anumberofmaintenance projects 8.5 MAINTENANCEACTIVITIES situations. conditions, suchashighwinds,create potentially hazardous to close theroad atanytimeinfuture to users shouldprevailing As hasalways beenthecase, GenesisEnergy willreserve theright out for eachother. users following signageandspeedrestrictions andkeeping aneye create assafe anenvironment aspossible, butthisdependsonall Genesis Energy hasworked hard to putinplace measures that al FIGURE ong

the

Tekapo

Bicycle

Canal.

“squeeze”

barriers

that

have

been

installed

utilised (Figure 38). from thegenerator dueto themodernmaterials and technology field poles. Thisupgrade willseeanincrease indesignedoutput and thegenerator’s supportingcore, andre-insulating therotor refurbished whichinvolved thereplacement ofthestator windings its practical life. Duringthereporting period,thegenerator was plant wascommissioned in1951andwasreaching theendof vertical shafthydro turbinedriven synchronous generator. The The generator atTekapo AisanEnglishElectric machinewitha 8.5.7 GENERATOR REFURBISHMENT parts have beenstandardised. and areduced requirement for spare parts,asequipmentand controllers meansmore efficientoperation ofthe Power Stations circuitry, operations interface equipment,andautomation other generation assets. Thereplacement oftheexcitation improved integration andcompatibility withGenesisEnergy’s nearing theendoftheirlife. TheControl System Upgrades have a replacement programme ofthecontrol systems whichwere (G2 andG3)hasbeencompleted. Theseupgrades were partof Power Station (G1),andthegenerators atTekapo BPower Station The upgrade ofthecontrol systems for thegenerator atTekapo A 8.5.6 CONTROLSYSTEM UPGRADES Remediation Project. Refer to Section7for adetailed descriptionoftheTekapo Canal 8.5.5 TEKAPOCANAL REMEDIATION PROJECT occurrence. pumps were removed andthepipessealed to prevent anyfurther intake structure. Asthiswater supply wasnolonger required, the supplied potable water to thevillagefrom thepower station was attributed to aredundant water mainpipewhichhistorically Tekapo sub-division. Uponinspection,thesource oftheflooding flooding oflandoccurring inanew, as yet undeveloped, Lake During thereporting period,GenesisEnergy wasalerted to some 8.5.4 reporting period. of theareas thatwere cleared willbere-planted early inthenext the Tekapo APower Station road duringthewinter months.Some has noticed amarked decreased intheamountofice forming on Mackenzie District Plan.Since removal occurred, GenesisEnergy f FIGURE or REDUNDANT LAKE TEKAPO WATER SUPPLY PUMP REMOVAL

refurbishment.

Tekapo

Power

Station

generator

(G1)

disassembled

Building Act2004. align withtherequirements oftheDamSafety Scheme,underthe reviewing itsDamSafety Assurance Programme sothatitwill Genesis Energy iscurrently assessing its damassets and be supported byregulations thatare currently beingdrafted. currently intended to start onthe31st ofMarch 2015and this will number ofoccasions. TheGovernment’s DamSafety Schemeis Scheme undertheBuildingAct(2004)have beendelayed ona The introduction ofnew damsafety regulations andDamSafety eir andCanalInlet Structure (Gate 17); and CRC905306.3)incorporates areview of: (as required underconditions ofresource consents CRC905301.4 September 2013hasbeensubmitted to Environment Canterbury was carried outontheTekapo Power Scheme.TheCSR,dated During thereporting periodaComprehensive Safety Review (CSR) recommendations oftheNZSOLD(2000)DamSafety Guidelines. electrical engineeringexperts, againinaccordance withthe year intervals andinvolves independent civil,mechanical and proper functioningofthedam)iscarried outatroughly five appurtenant structures (structures thatare integral to the A Comprehensive Safety Review ofthedamsandassociated Review reports are available onrequest. Safety Guidelines.CopiesoftheMonthly andAnnualDamSafety professional engineers as suggested bytheNZSOLD (2000)Dam An AnnualDamSafety Review iscarried outbyspecialist which isinternally reviewed byan engineer. and provides GenesisEnergy withamonthly damsafety report, locations. Anexperienced professional engineerreviews thedata assets are inspected anddata iscollected atanumberof inspections atpre-determined intervals. Onamonthly basis, Dam safety surveillance involves routine monitoring and have yet to beformalised. to current safety practices. Thenew regulations relating to dams Tekapo Power Scheme.Recent legislation mayresult inchanges for managingandmonitoring thehydraulic structures ofthe Zealand SocietyonLarge Dams(NZSOLD)provide theframework The New ZealandDamSafety GuidelinespublishedbytheNew 8.6 DAM SAFETY Tekapo Bheadpond State Highway8 Hayman Roadand Location ekapo ASurge Chamber. ekapo Canal embankmentsandheadpond; e Tekapo Control Structure (Gate 16); e George Scott (includingtheembankment,weir, auxiliary TABLE The T The T Lak The Lak w

Public

complaints of water quality. that fish were stressed as a consequence head pond.Theangler wasconcerned about thewater qualityintheTekapo B complaint from an angler withconcerns project, FishandGamereceived a During theTekapo Canalremediation them down theTekapo CanalRoad. tourist's GPSdevices were directing not beusedasathoroughfare, andthat advising thattheTekapo Canalcould tourists regarding inadequate signage they were receiving complaints from Mackenzie District Councilreported that Complaint

during

the

reporting

period.

for furtherdetails onWater QualityduringtheTekapo Canalremediation project. observe anyconcerns withrelation to water qualityorfishhealth.SeeSection7.3.1 health. FishandGameconducted asite visitfollowing thecomplaint, anddidnot confirmed atthetime thatthiswasanacceptable level for water qualityandfish at thetimeofcomplaint was56%.Cawthron Institute water qualityscientists column. Water qualitymonitoring showed thatDissolved Oxygenintheheadpond additional water beingby-passed down thecanal to promote mixingofthewater outage. Actionsincludedrunningaeration equipmentfor extended periods,and were beingtaken to managewater qualityintheTekapo Canalduringthe canal Communicated to FishandGameEnvironment Canterbury theactionsthat canal access restrictions, andredundant signagehasnow beenremoved. arrangement review. New signagehasbeen installed to better inform tourists of maps accordingly. Signagereview took place aspartofTekapo CanalRoadaccess responses from two oftheGPScompanies thatthey would beupdatingtheir was misleading tourists down theTekapo CanalRoad (aprivate road). Received known GPScompanies, to inform themthattheirGPSinformation waswrong and Three monthspriorto receiving thiscomplaint, GenesisEnergy hadcontacted all Corrective Action

and NIWA (Environmental Data Explorer New Zealand)websites. by third partiesandcan beviewed ontheEnvironment Canterbury Environmental data intheLake Tekapo catchment isalsorecorded purpose for obtaining it. genesisenergy.co.nz) andstating thedata you require andthe the Hydrology Team viatheiremailaddress (hydrology@ archive data sets.Thisdata can beobtained bycontacting Genesis Energy accepts requests for hydrology data from our displaying more data innearreal-time onourwebsite. site andthedata we record along withtheappropriateness of Genesis Energy iscurrently undertaking areview oftheweb Energy website underRivers, Lakes andRainfall information. is displayed andupdated at30minute intervals ontheGenesis Currently only Lake Tekapo level isprovided publically andthis TekPS recording water level, flow, rainfall, windandsnow data. Genesis Energy hasanextensive monitoring network around the 8.8 PUBLICALLY AVAILABLE HYDROLOGY INFORMATION period, andtheactionstaken to address theissues. Table 11details thetwo complaints received for thereporting documented along withrelevant recommendations andactions. captures theseinanEvent ManagementSystem. Complaintsare Genesis Energy takes allpubliccomplaints seriously and 8.7 PUBLICCOMPLAINTS

31 ENVIRONMENTAL REPORT // 14 32 TEKAPO // 14 09 INITIATIVES ENVIRONMENTAL COMMUNITY

AND

footbridge to date. campaign hasraised atotal of$110,000towards thecost ofthe footbridge plankandhave their namepermanently engraved. This public campaign, “BuyaPlank”,inwhichdonors can “purchase" a During theyear, theFootbridge Societyhasrunavery successful beginning of2015. December, andcompletion ofthebridgeisscheduled for the off-site. Construction on-site isscheduled to recommence in The steel structure for the footbridge is at present being fabricated the bed of the Tekapo River at the outlet to Lake Tekapo (Figure 39). During the2013/14summer,four bridgepiers were installed in $500,000 towards buildingthefootbridge. Agreement withtheFootbridge Society to provide supportof the church. GenesisEnergy hasentered into aSponsorship side ofthebridgeandvisitors willusethefootbridge to access of thechurch asvehicles willeventually parkonthetownship a linkto cycle waysandwalkways,willenhance thesanctity provide safe access between thetownship andthechurch, provide to Lake Tekapo township. Theestablishment ofafootbridge will Control Structure (Gate 16)from theChurch oftheGoodShepherd footbridge across thelake outlet upstream oftheLake Tekapo of Lake Tekapo community members withthegoalto builda The Lake Tekapo Footbridge Societywasformed byagroup 9.2 LAKETEKAPOFOOTBRIDGE SOCIETY Schoolgen programme intheirschools. for adaytogether to share ideasanddevelop thenext stage ofthe the principalfrom Lake Tekapo Schoolcoming to Christchurch also took place withteachers from theChristchurch schoolsand Schoolgen programme. AspecialSchoolgenTeachers Workshop time withthestudents itwasanotherintensive immersion into the Energy television advert. Withwalldisplaysspecially created and school Schoolgenperformance whichwasfilmed for theGenesis resources. Allthechildren re-created aspecialstaged whole- Lake Tekapo School’s education programme usingtheSchoolgen enewable energy andenergy efficiency. In 2013/14theSchoolgenprogramme wasfurtherintegrated into e changeandelectricity generation. om thesun,andto teach theirstudents aboutsolarenergy, ows theseschoolsto generate aportionoftheirelectricity w Zealandcan useto explore electricity generation, energy comprehensive programme thatincludes: Since Schoolgenbeganin2006.GenesisEnergy hascreated a parents, parent’s colleagues, friendsandthewhole community. theirs, butthatofthepeople around themincludingtheirteachers, cultivate environmentally-aware thinkingandbehaviour;notjust By talking andinteracting withchildren we have areal chance to understand therole renewable energy willplayintheirfuture. our future leaders anddecisionmakers soitisimportant thatthey solar energy to life for children across New Zealand.Children are Schoolgen isaprogramme developed byGenesisEnergy to bring 9.1 SCHOOLGEN 09 COMMUNITYANDENVIRONMENTAL INITIATIVES oviding 66schoolsacross New Zealandwitha2kilowatt ree, New Zealandcurriculum-linked teaching resources that Specialised Envir Pr A particularf F r Schoolgen schools,helpingschoolst Primary, Int There is a dedicated programme website climat fr all (kW) PVsys and ener efficiency, r Ne any Primary,Int these schoolsisdisplay on whichther gy efficiency, enewable energy andclimate change. tem, atnocost to theschools.ThePVsystem ermediate andSecondary Schoollevel inthe ocus onsolarenergy (photovoltaic (PV)systems) eal timegeneration data from thesolarpanelsat ermediate orSecondary schoolin onmental Educators whowork atthe

ed for anyone to see. o learn about www.schoolgen.co.nz

which combines Ng Aoraki Boundisacultural andpersonal development programme Runanga oNgãiTahu. support Aoraki Bound,aleadership programme developed byTe Genesis Energy inpartnership withtheBankofNew Zealand 9.3 AORAKI BOUND–NGÃI TAHU simply thankthosethat supported themto attend thecourse. their manyexperiences andlearnings gainedfrom thecourse and an opportunityfor theparticipantsto reflect andimpartsomeof friends, sponsors andIwi representatives. Thehãkariprovides and achievements, ahãkariwasheldandattended byfamily, conclusion ofthecourse, to acknowledge the participants’ journey and March 2014withatotal of26participants(Figure 41).Atthe Two courses ofAoraki Boundwere successfully heldinFebruary the NgãiTahu capability strategy andhas210Alumni. Aoraki Boundisthehighest profile ofalltheprogrammes within Ng Queen Charlotte Sound,thentake a hikoi (journey) through the Students spendeightdaysattheOutward BoundbaseinAnakiwa, challenges participantsto stretch theirpersonal development. a 20dayjourney thatbuildsleadership, cultural awareness and the experience andreputation ofOutward Bound.Thecourse is Cook –amountain ofcultural significance to Ng ã summer FIGURE FIGURE i Tahu tribalrohe (region), finishingatthebaseofAoraki/Mt

39 40

// // 2013/14

The Aoraki

Lake ã i Tahu cultural knowledge andexpertise with

(photo: Bound

Tekapo

participants Colin

Footbridge

Maclaren).

Piers

waka

installed

journey. ã i Tahu (Figure 40).

during

the

33 ENVIRONMENTAL REPORT // 14 34 TEKAPO // 14 facilities nationwide. funding supporting captive breeding sites andduckling rearing The WhioNest Eggproject (WHIONE)hasalsoprogressed with integration ofwhiomanagementnationally. data from protection sites across thecountry, allowing better sites. Thishasallowed openpublicaccess to critical whio database to capture whiorelated information from protection successful development ofnew data loggers andanational Population managementhasbeenrevolutionised through the back country rivers. the goalofdeveloping better technology to protect whioinremote national trialofself-resetting traps hasalsobeencompleted, with number oftraps purchased underthisprogramme to 5200.A deployed atthesesites over thelast year, whichbringsthetotal and otherpredators. Over 1600traps have beenpurchased and whio protection sites receiving supportto better managestoats Investment inpredator control hasbeenakey focus with14 the WhioForever Management Plan. Energy, DOCandForest andBird working together to implement During thelast year significant work hasbeenachieved byGenesis Programme thereby securingthefuture ofwhio. over five years to fully implement theNationalWhioRecovery 2011 inWellington. Theagreement commits, infull,$2.5million subsequently signedbyDOCandGenesisEnergy on31August sponsor ofwhio.TheWhioForever Investment Agreement was DOC’s NationalWhioRecovery Group to become thecorporate In 2010,GenesisEnergy received anexclusive invitation from 9.4 WHIOFOREVER Thanks to Te RunangaoNgãiTahu for contributing to thissection. work alongside NgãiTahu. tchurch, KaiTahu. December 2011.Itisanexciting opportunityfor GenesisEnergy to The GenesisEnergy/ NgãiTahu agreement wassignedon22 ovided thisandsomuchmore”. KeriWhaitiri,aged45, ermination to effect positive change.Aoraki Bound om above –andthento eventually return with the verday lives, to stand onmountain andreflect onourselves oncepts into myleadership inmylife andmyteaching.” e AtiAwa,somethingIdidn’teven know about.Iam xcited to learn more abouthow to incorporate Maori Somefeedback received from participants: ely dowe gettheopportunityto step awayfrom our e always wanted to develop astronger connection with FIGURE “Rar “I hav Chris pr det fr e Campbell P c e with T this. Aor my Maoriherit

// aki Boundhasalready led meto getregistered

An otter, aged28,Auckland,Te AtiAwa.

Aoraki age andnever felt empowered to beable to do

Bound

participant

enjoying

sunrise.

the tideisbeginningto turnfor thewhio. community groups andiwithatgetsupportfrom theProgramme, involved intheWhioRecovery Programme andthemany however, thanksto theunited efforts ofthethree organisations There isstill much to bedoneto secure thefuture ofthewhio, website www.whioforever.co.nz the-line marketing campaign to drive traffic to the Whio Forever including visitor centre displays,press releases andanabove- Zoo (Figure 42).Duringthemonthotherinitiatives were run advertising campaign andtheWhioFamily weekend atAuckland to raise awareness ofthestatus ofthewhiothrough anational In addition,theWhioAwareness campaign in March 2014worked included: The initiatives thatreceived supportinthe2013/14fundinground community projects for eachofthetwo years ofthecanal project. Tekapo CommunityFund. Grants totalling $50,000were awarded to Tekapo CanalRemediationProject, GenesisEnergy created aLake As awayofrecognising theTekapo community’s supportfor the 9.5 LAKETEKAPOCOMMUNITYFUND Below are figures for theperiod1April2013 to 31March 2014. the WhioRecovery Programme hasincreased duringthelast year. The numbers ofadditionalwhiopairs protected primarily through in total willbeachieved by2016,rather than2019). protected whiopairs earlierthananticipated (i.e.thetarget of400 priority whioSecuritySites to accelerate theirtarget numbers of targets for thefirst time ever. Ithasalsoallowed thehighest confident thatthey have the capacity to meettheirwhioprotection The managers ofthevarious whioprotection sites are now pairs to 322). pairs underprotection since theprogramme’s inception (from 205 All ofthiswork hasresulted inanincrease of117whiobreeding Hancock Forest Managers Pureora RECOVERY SITES Wangapeka Tongariro Forest Whirinaki Te Urewera SECURITY SITES ree plantingto the south ofLake Tekapo township; Auckland FIGURE TABLE during primaril T Solar lightingsys

12 the

y 42

// through Zoo.

reporting //

The

Zoo

numbers

patrons

the

tems intramping huts; period.

Whio

of taking

Recovery additional

part

Programme in

whio

the

whio pairs

fun

protected has

days Number ofpairs

increased

26 2 3 2 6 6 Catchment. Alders are exotic trees whichgrow adjacent to a project whichseeksto remove AlderTrees from theMaryburn During thereporting period,GenesisEnergy wasmade aware of 9.7 ALDERREMOVAL money wasraised towards this(Figure 43). the school.Withover 117riders ontheday,asignificant amountof aimed atraising fundsfor outdooreducation programmes within weekend ofFebruary byMackenzie College, Fairlie, theevent is that isheldintheLake Tekapo RegionalPark. Runonthefirst Tekapo 10isaten hourcross country mountain bike relay race 9.6 TEKAPO10 enhancement. focus oncommunity enrichment,education, and/orenvironmental in lightofGenesisEnergy’s community investment criteria which members andGenesisEnergy staff. Applications were reviewed Committee whichwasmadeupofLake Tekapo CommunityBoard and were reviewed bytheLake Tekapo CommunityFund e truck. The initiatives were submitted bygroups withinthecommunity ekapo RegionalPark; ch oftheGoodShepherd; Mar-13 Month Total 2013 Nov-13 Oct-13 Sep-13 Aug-13 Jul-13 Jun-13 May-13 Apr-13 trial light,stand andgenerator for useonthelocal e Tekapo NZMadeFete website; ete repair ofpathwaysandlandscaping around the TABLE Leeuw L Mack FIGURE An indus Shade sailf Rabbit nettingatLak An equipmentshedf The Lak Compl ydia fir T Chur

enzie Kinsman,

en, 13

// Kerry

College //

Christchurch

Tekapo or theLake Tekapo Playgroup; and

Logan

Cameron,

(from

Jackson,

Mixed or volunteers restoring/maintaining Lake e Tekapo Regional Park;

left Curtain

Samantha

Number ofwindows to

Podiums

right: Johnny

Bank

Hope Isabel

statistics van Teams

and Leeuwen,

2,512 Clarke, 113 111 197 120 311 449 346 463 402

from Shannon

for

Brett Dunedin 2013.

Haley 1,899 1,476 1,081 1,542 1,263 9,581 Area (m 368 630 352 970

Hope.

2 Walker,

)

van

and

CCC

2 2 2 2 8 1 8 8 -

9.8 CURTAIN BANK remove Alders from othersectionswithintheMaryburnCatchment. that have already beenputinbyvolunteers andlandowners to be removed inspring2014.Thiswork complements themanyhours vicinity oftheMaryburnFill.Additionaltrees around thepondwill of Alders onGenesisEnergy landadjacent to waterways inthe During thereporting period,GenesisEnergy commenced removal Environment Canterbury, Fish&Gameandvolunteers. project isacollaborative effort which involves landowners, waterways, andtend to exclude otherspecies(Figure 44).The 13). Most curtains were distributed between AprilandAugust. with curtains in2013,withnearly 500householdsassisted (Table since August 2010andarecord numberofhouseswere provided Genesis Energy hassponsored theChristchurch Curtain Bank curtains for livingrooms andbedrooms. their homeswarmerbyproviding recycled thermalorlined programme’s objective isto protect thehealthofpeople bymaking insufficient, ornocurtains to shutoutthe cold anddraughts. The income householdswholive incold and/ordamphomesandhave by thatorganisation. TheChristchurch Curtain Bankassists low Action andprimaryfundscome from thesurplusesgenerated The Christchurch Curtain BankisrunbyCommunityEnergy their energy billsandcreate warmer,healthier,more private homes. Genesis Energy can assist low income householdsto save money on Involvement inthesecommunity initiatives isonewayinwhich Curtain Banks,located inAuckland,Wellington andChristchurch. Genesis Energy isproud to bethemajorsponsorofthree different HNZ 204 10 13 23 33 32 39 36 10 8 Maryburn FIGURE

Fill.

Own home An

Alder 107 10 11 22 19 22

3 7 9 4 tree

growing Private rental

adjacent 150 11 13 30 21 28 28

6 9 4 to

pond Number ofhouses

near

the

494 28 35 24 60 90 61 97 81 18

35 ENVIRONMENTAL REPORT // 14 36 TEKAPO // 14 10 OBJECTIVES KEY 10.1 REVIEWOFKEYOBJECTIVES FOR 2013-2014 10 KEYOBJECTIVES RCMS Reporting Project Tekapo CanalRemediation Outcome /Initiative System Environmental Management Volunteer Day Signage Lake Tekapo CommunityFund Ngãi Tahu TABLE

Review

key

objectives capabilities. Enhance RCMSreporting Project. Tekapo CanalRemediation works for seasontwo ofthe Continue to plan for and begin Objectives company-wide EMS. To review andupdate the operate. community inwhichwe Support projects inthe Management System. reflected intheSignage All signageisrelevant and Community Fund. projects viatheLake Tekapo Support community opportunities withNg relationship seeking Continue to progress

for

2013-2014 ã i Tahu. Actions 2013-14 ensure itiskept upto date. procedures are inplace to up to date androbust Management System is assets. Ensure Signage Genesis Energy generation consistency withother Review signageto ensure Tekapo CommunityBoard. in partnership withLake for community projects Make $50,000available alongside NgãiTahu. opportunities to work Project andseekother Tekapo CanalRemediation part ofseasontwo ofthe for thefishsalvage as Work alongside NgãiTahu agreements. consents andstakeholder works inlinewithresource Undertake seasontwo company. and roll-out across the Complete review ofEMS meets thoserequirements. system isdeveloped that IT to ensure thatareporting requirements andwork with Review RCMSreporting volunteer day. staff to participate ina All Tekapo Environmental How didwe do?

process. managed through acontinuous improvement where necessary. Thisdocumentation isbeing Documentation wasreviewed andrealigned A review oftheEMSwasundertaken. volunteer dayatScotts Creek. Genesis Energy staff participated ina removed. in place andredundant signagehasbeen Project. Additionalsignagehasbeenput completion oftheTekapo CanalRemediation Signage review took place following Project (seeSection9.5). seasons oftheTekapo CanalRemediation community projects for eachofthetwo Grants totalling $50,000were awarded to Waihao Runanga. representatives ofArowhenua, Moeraki and relation to theTekapo Power Schemewith cultural mappingexercise andfieldtripin partnership withNgãiTahu. Completed a Successfully completed fishsalvage in been surrendered (seeChapter 7). to activitiesthathave beencompleted have consented are complete, andconsents related full compliance to date. Allworks thatwere Mackenzie District Councilhave reported of schedule. Environment Canterbury and Season two works were completed ahead are underway. RCMS enhancements have beenscoped and

37 ENVIRONMENTAL REPORT // 14 38 TEKAPO // 14 Key environmental objectives for the2014-15year buildonmanyinitiatives andprogrammes thatare already underway. 10.2 KEYOBJECTIVES FOR 2014-2015 Ngãi Tahu Environmental ManagementSystem Canal road RCMS Reporting Volunteer Day Environmental Monitoring Outcome /Initiative TABLE

Key

objectives

for

2014-2015 Objective Management System. the company's new Business Management System into Integrate theEnvironmental all road users. Canal road provides for safe usefor capabilities. Enhance RCMSreporting in whichwe operate. Support projects inthecommunity Scheme. programme attheTekapo Power environmental monitoring Seek to develop along term to partnertogether in. Seek on-goingproject opportunities Action 2014-15

ensure thesafety ofallroad users. Monitor theuseandeffectiveness ofthenew canal road layout to business. Ensure consistency oftheframework andalignment across the process. Work withITto complete thedevelopment oftheRCMSreporting Christchurch Environmental staff willparticipate inavolunteer day. determine future environmental monitoring needsfor theTekPS. Review results andrecommendations ofthesynopticstudies to an extention ofthe2013-2014workstream. Seek to identifyproject opportunitiesto partnerwithNgãiTahu as Energy. Rules, 1990.Appendix oftheResource ConsentsheldbyGenesis Tekapo Power SchemeAppendixAExtracts ofWaitaki Operating Energy. Tekapo lakeshore erosion assessment. Prepared for Genesis Tekapo Power SchemeEnvironmental Scoping Studies:Lake Shore Processes andManagementLtd(MartinSingle), 2013. September 2012.Prepared for GenesisEnergy. Water Monitoring Programme for Tekapo CanalRemedialWorks. Pattle Delamore Partners Ltd.2012.Groundwater andSurface Tekapo CanalRemediationWorks, June2013. Groundwater andSurface Water Monitoring Programme for Pattle Delamore Partners Ltd.2013c.AnnualReporton for GenesisEnergy. Environmental Scoping Study–Tekapo River Hydraulics. Prepared Pattle Delamore Partners Ltd.2013b.Tekapo Power Scheme Genesis Energy. Environmental Scoping Study–Water Quality. Prepared for Pattle Delamore Partners Ltd.2013a.Tekapo Power Scheme Energy. Tekapo CanalRemedialWorks. June2014.Prepared for Genesis Groundwater andSurface Water Monitoring Programme for Pattle Delamore Partners Ltd.2014.AnnualReporton Data File 2012. Ministry ofEconomic Development, 2012.New ZealandEnergy Cawthron Institute. ReportNo.2265.Prepared for GenesisEnergy. Kelly, D.,2012:Tekapo CanalWater QualityManagementPlan. for GenesisEnergy. Monitoring 2013.Cawthron Institute. ReportNo.2303.Prepared Kelly, D.andBarter, P., 2013:Tekapo CanalIntervention for GenesisEnergy. Monitoring 2014.Cawthron Institute. ReportNo.2485.Prepared Kelly, D.,2014:Tekapo CanalWater QualityManagementPlan– Manahuna/Twizel Office. and DepartmentofConservation. Unpublishedreport heldatTe Report LC1176. Prepared for MeridianEnergy, GenesisEnergy River Recovery, October 2012.Landcare Research Contract Innes, J.andSaunders, A.2012:Amid-term evaluation ofProject Annual Environmental Report. Genesis Energy Ltd.,2013.Tekapo Power Scheme2012/2013 Report No.2523.Prepared for GenesisEnergy. Project SummaryReport:January2014.Cawthron Institute. Gabrielsson, R.andDoehring,K.,2014:Tekapo CanalFishSalvage Genesis Energy. Scoping Study:AquaticEcology oftheTekapo River. Prepared for Montgomerie), 2014.Tekapo Power SchemeEnvironmental Freshwater Solutions:Environmental Consultants (Richard Canterbury. August 2008. Degree ofMaster ofScience inEngineeringGeology, University of thesis submitted inpartialfulfilmentofthe requirements for the Cooksey, K.(2008).Hydrogeology oftheMackenzie Basin.A 11 REFERENCES

39 ENVIRONMENTAL REPORT // 14 TEKAPO POWER SCHEME MAP // 14