Subsidence Management Plan - Quetools

CONTENTS1 INTRODUCTION1.1 SCOPE 11.2 OBJECTIVES 12 MINE PLANNING2.1 MINING METHODS 22.2 MINE LAYOUT 22.3 CONSIDERATION OF SUBSIDENCE IMPACTS 23 SUBSIDENCE PREDICTIONS4 SUBSIDENCE IMPACTS5 COMMUNITY CONSULTATION5.1 CONTINUING CONSULTATION 45.2 GCCM COMMUNICATION AND NOTIFICATION 45.3 MANAGEMENT AND CONSULTATION MEETINGS 45.4 STAKEHOLDER ISSUES AND CONCERNS 55.5 RELEVANCE AND ADEQUACY OF CONSULTATION PROCESSES 66 SUBSIDENCE MONITORING AND REPORTING6.1 SUBSIDENCE MONITORING 76.2 GENERAL APPLICATION AREA 76.3 NATURAL FEATURES 86.4 PUBLIC UTILITIES 106.5 FARM LAND AND FACILITIES 116.6 INDUSTRIAL, COMMERCIAL AND BUSINESS ESTABLISHMENTS 126.7 AREAS OF ARCHAEOLOGICAL AND/OR HERITAGE SIGNIFICANCE 166.8 RELEVANCE AND ADEQUACY OF MONITORING PROCESSES 166.9 SUBSIDENCE REPORTING 176.9.1 REGULAR REPORTING 176.9.2 SIGNIFICANT INCIDENTS AND/OR VARIATIONS 176.10 RELEVANCE AND ADEQUACY OF REPORTING PROCESSES 177 SUBSIDENCE MANAGEMENT PROCESSES7.1 NATURAL FEATURES 187.2 PUBLIC UTILITIES 207.3 FARM LAND AND FACILITIES 207.4 INDUSTRIAL, COMMERCIAL AND BUSINESS ESTABLISHMENTS 227.5 AREAS OF ARCHAEOLOGICAL AND/OR HERITAGE SIGNIFICANCE 257.6 RELEVANCE AND ADEQUACY OF MANAGEMENT PROCESSES 258 SPECIFIC MANAGEMENT PLANS

CONTENTS9 PUBLIC SAFETY MANAGEMENT PLAN10 RESPONSIBILITIES10.1 GGCM 2810.1.1 MINE MANAGER 2810.1.2 TECHNICAL SERVICES MANAGER 2810.1.3 SAFETY, TRAINING AND ENVIRONMENT MANAGER 2810.1.4 MINE SURVEYOR 2910.1.5 ENVIRONMENTAL ADVISOR 2910.1.6 PRIVATE LANDOWNERS 2910.1.7 XSTRATA/XMO 2910.1.8 TELSTRA 3010.1.9 ENERGY AUSTRALIA 3010.1.10 SINGLETON SHIRE COUNCIL 3010.1.11 DEPARTMENT OF LANDS 3010.1.12 OTHER STAKEHOLDERS 3011 AUDIT AND REVIEW11.1 AUDIT 3111.2 REVIEW 31ANNEXURESANNEX A:ANNEX B:ANNEX C:ANNEX D:ANNEX E:ANNEX F:ANNEX G:ANNEX H:ANNEX I:ANNEX J:ANNEX K:ANNEX L:ANNEX M:TELSTRA ASSETS SUBSIDENCE MANAGEMENT PLANELECTRICITY TRANSMISSION LINES SUBSIDENCE MANAGEMENT PLANFOREST ROAD SUBSIDENCE MANAGEMENT PLANBETTYS CREEK SUBSIDENCE MANAGEMENT PLANSURFACE DRAINAGE SUBSIDENCE MANAGEMENT PLANLAND MANAGEMENT PLANFARM BUILDINGS SUBSIDENCE MANAGEMENT PLANFARM FENCES SUBSIDENCE MANAGEMENT PLANFARM DAMS SUBSIDENCE MANAGEMENT PLANRAVENSWORTH EAST TAILINGS PIT (TP2) SUBSIDENCE MANAGEMENT PLANMT OWEN EASTERN RAIL PIT SUBSIDENCE MANAGEMENT PLANARCHAEOLOGY SUBSIDENCE MANAGEMENT PLANPUBLIC SAFETY SUBSIDENCE MANAGEMENT PLANLIST OF FIGURESFOLLOWS PAGE NOFIGURE 1 APPROVED PLAN 1FIGURE 2 SUBSIDENCE MONITORING TRANSECTS 7

1 INTRODUCTIONThis Application for Subsidence Management Approval – SubsidenceManagement Plan (SMP) is submitted by Glennies Creek Coal ManagementPty Ltd (GCCM) as part of an application for approval for the secondaryextraction of Longwalls 10 to 17 within the Middle Liddell seam, anddevelopment of associated first workings at Glennies Creek Colliery.The SMP has been developed through a process of risk assessment andcommunity consultation in order to identify potential risks, their likelihoodand consequences and to manage the potential subsidence impacts.Management will be achieved through prevention, mitigation and/orremediation of subsidence impacts as required.1.1 SCOPEThis SMP covers proposed secondary extraction of Longwall Panels 10 to 17and associated first workings, including mains and gateroad development asillustrated on the SMP Approved Plan (see Figure 1). The Application Area isthe surface area defined by an angle of draw of 26.5° from the extraction limitsof proposed Longwalls 10 to 17.1.2 OBJECTIVESThe objectives of this SMP are as follows.• To present the subsidence monitoring and reporting processes.• To present the management solutions, processes and action plansdeveloped as a result of the subsidence impact assessment andcharacterisation of surface features.• To present the management strategies to be adopted in order to reduce theidentified risks associated with subsidence.• To ensure that consultation with stakeholders regarding subsidence isongoing and undertaken in accordance with a documented process.• To document allocated responsibilities under the management plan.• To ensure that the management plan is reviewed and audited for currencyand application.ENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 20071

LW 10 - 17 SMP Application AreaSource: Glennies Creek Coal ManagementLegend0 200mSMP Application AreaProposed Void as per ApplicationMine WorkingsProposed Mine WorkingsFigure 1Subsidence Management Plan - Approved PlanGlennies Creek Coal Management Pty Ltd - Glennies CreekSubsidence Management PlanJobs/200 5/0038321 SMP-Fg1 Subsidence Management Plan - Approved Plan.cdr 14 11 2006 SP Environmental Resources Management Australia Pty Ltd

2 MINE PLANNING2.1 MINING METHODSThe proposed mining method represents a continuation of the current systememployed at Glennies Creek Colliery, namely continuous miner developmentsupporting longwall extraction.Roadway development in gateroads and main headings will be carried outusing continuous miners. These continuous miners are either wide head(single pass) or narrow head (double pass) machines, with integrated roof andrib bolting rigs. Shuttle cars are employed to transport the coal from thecontinuous miners to the conveyor system.Secondary extraction will be by retreating longwall methods. The longwallequipment is capable of operating in the height range of 1.8m to 3.1m and ofnegotiating the expected geological conditions, including any sandstonechannels. With an average seam thickness of 2.3m, the full seam will beextracted.Longwall extraction is the preferred method of mining as it provides thegreatest production and economic efficiencies when compared to otheroptions. It is the only method that can provide acceptable economic returnsfor extraction of the area based on coal quality, required production levels,current economics and forecasted economic parameters.2.2 MINE LAYOUTThe longwall panels are oriented in a north-east/south-west direction, withmain headings being developed in a north-westerly direction. The longwallpanel widths are 246m (rib to rib) to maximise resource recovery and reducethe amount of development drivage required over the life of the mine relativeto longwall tonnes extracted.The mine layout perimeter is constrained by areas of the Middle Liddell seamwhich are steeply dipping.2.3 CONSIDERATION OF SUBSIDENCE IMPACTSThe location and orientation of Longwalls 10 to 17 represents the mostpractical, efficient and cost effective progression of the longwall miningsystem at Glennies Creek Colliery. It is expected that any potential subsidenceimpacts on the identified surface and sub-surface features within theApplication Area can be adequately managed through measures set out in thisSMP.ENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 20072

3 SUBSIDENCE PREDICTIONSDetailed subsidence predictions are provided in Section 7 of the SMPApplication – Written Report.In summary, full subsidence is likely to develop at any point only after severaladjacent longwall panels have been mined. Subsidence in the final subsidenceprofile is likely to vary locally across each panel, being greater in the centre ofeach panel and less over the chain pillars. This variation across individuallongwall panels is expected to decrease in the later longwalls because of theincreasing overburden depth.The maximum vertical subsidence predicted over Longwalls 10 to 16 is 1.6mand 0.8m over Longwall 17. The 1.6m maximum subsidence value isdetermined from 65% of the assumed 2.4m seam section mined. Assubsidence data becomes available from Longwalls 7 to 9, the predictions ofmaximum subsidence and other subsidence parameters over the remaininglongwall panels will be able to be refined (SCT, 2006).Systematic ground tilt and strain is likely to be fairly regular and may increasewith maximum subsidence. The overburden depth ranges fromapproximately 380m to 500m over Longwalls 10 to 17 with an averageoverburden depth estimated to be about 460m. A value of 380m is used toprovide an upper limit on the maximum values of tilt and strain. On thisbasis, a maximum tilt of 12mm/m is predicted (SCT, 2006). The actualmaximum tilt measured to date over Longwalls 1 to 5 is 5mm/m (SCT, 2006).On the basis of previous measurements at Glennies Creek, the maximumstrains expected are up to 6mm/m in tension and 9mm/m in compression(SCT, 2006).4 SUBSIDENCE IMPACTSDetails of the potential subsidence impacts on surface and sub-surface featuresare provided in Section 10 of the SMP Application – Written Report.ENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 20073

5 COMMUNITY CONSULTATIONGCCM considers community consultation to be an ongoing process in allaspects of its mining operations, including subsidence management.Details of the community consultation processes undertaken for this SMPApplication, and the results of that consultation, are provided in Section 8 ofthe SMP Application – Written Report.5.1 CONTINUING CONSULTATIONGCCM recognises that community/stakeholder consultation will be animportant ongoing aspect of subsidence management and will include:• regular communication of subsidence-related information to stakeholders;• management and consultation meetings (formal and informal) withstakeholders regarding the subsidence of specific features; and• the provision of formal and informal opportunities for communication ofany subsidence-related concerns and issues to GCCM.5.2 GCCM COMMUNICATION AND NOTIFICATIONThe specific management plans developed for individual features within theApplication Area (see Section 8) undertake to provide monthly notification ofmining progress relative to those features to the relevant stakeholders. Thiswill ensure that stakeholders are aware of impending subsidence impacts onthose features.5.3 MANAGEMENT AND CONSULTATION MEETINGSGCCM proposes that there will be regular subsidence management andconsultation meetings with stakeholders during the mining of Longwalls 10 to17. The stakeholders involved and the frequency of these meetings will bedetermined by the progress of subsidence and actual and predicted impactson surface and sub-surface features. Additionally, a number of the specificmanagement plans include programs for meetings regarding the managementof subsidence impacts as described below.Relevant GCCM personnel will also be available at other times to discusssubsidence issues at the request of any stakeholders.ENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 20074

Telstra AssetsThe specific management plan agreed with Telstra for their assets within theApplication Area (Annex A) includes regular review meetings to be held as aforum for discussion of subsidence monitoring and management processes,and resolution of any subsidence management issues related to those assets.Electricity Transmission LinesAs agreed with EnergyAustralia, other than the notification process describedin Section 5.2, there is no formal ongoing consultation with theirrepresentatives. The specific management plan for the electricity transmissionlines (Annex B) requires that if there are subsidence impacts on the lines whichrequire remediation, agreed consultation between GCCM andEnergyAustralia will be undertaken in order to initiate the required works.Forest RoadThe specific management plan for Forest Road (Annex C) requires notificationto Singleton Shire Council and the Department of Lands of subsidence-relatedimpacts. In addition, there is a requirement for joint inspections of the road ata frequency determined by the progression of mining.5.4 STAKEHOLDER ISSUES AND CONCERNSA free-call environmental hotline (1800 505 361) was established by GCCM in2004 to facilitate the reporting of any environmental matter of concern,including subsidence-related issues. This number was communicated at thepresentation to stakeholders and in the letters notifying stakeholders of thesubmission of the SMP application. It has also been advertised in theSingleton Argus (local newspaper).Any individual who has concerns regarding a subsidence-related issue isurged to contact the mine to enable the issue to be addressed promptly.Any subsidence-related issues raised by stakeholders via the environmentalhotline, or through other consultation processes, will be recorded in the mine’sexisting Community Complaints Register. This process will ensure that allissues raised are addressed and a record is kept of issues, consultation,responses and actions.ENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 20075

5.5 RELEVANCE AND ADEQUACY OF CONSULTATION PROCESSESThe Guidelines for Best Practice Community Consultation in the New SouthWales Mining and Extractive Industries (MCMPR, 2005) were applied duringthe community consultation process for this SMP Application.Additionally, GCCM has been successfully holding formal and informalconsultation discussions and meetings with interested stakeholders andlandowners since operations began at Glennies Creek Colliery in 1996. Thistype of stakeholder consultation will continue.GCCM expects that there will be ongoing consultation with stakeholdersregarding specific features within the Application Area and issues which ariseover time. Mechanisms are in place through which stakeholders can raiseconcerns or issues regarding subsidence impacts.The ongoing consultation processes described in this SMP, and appendedspecific management plans, are relevant and adequate for the predicted levelof subsidence impacts.ENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 20076

• Far Field Effects. The two existing far field effects monuments have beenplaced approximately 400m apart above Longwalls 12 and 13, adjacent tothe Mt Owen Rail Spur. The two proposed far field effects monuments willalso be placed approximately 400m apart above Longwalls 14 and 15.The survey monuments comprise 500mm or 600mm Feno Marks placed flushto the ground to minimise the possibility of disturbance and injury to wildlifeor stock. If Feno Marks cannot be placed, other suitable substitute surveymonuments shall be employed.In all subsidence surveys, unless otherwise specified, survey best practice willbe employed to achieve sub 0.010m accuracy in the ‘x’, ‘y’ and ‘z’ axes. Thisaccuracy level conforms to the following classes as per the ISCM standards.• EDM: Class C• GPS: Class C• Angles: Class C• Differential Levelling: Class C6.3 NATURAL FEATURESBettys CreekA specific management plan has been developed for Bettys Creek (Annex D) tomonitor main channel flow, bed and bank stability, erosion andsedimentation, riparian vegetation and flooding.Cross sections have been surveyed along Bettys Creek (Sections 1 to 7 onFigure 2) downstream of XMO’s Eastern Rail Pit. These cross sections havebeen located so as to provide sufficient data for hydrological analysis andmanagement, especially pertaining to the monitoring of the main channelflow. The sections will be re-surveyed at the completion of Longwalls 10, 11,12 and 13 utilising appropriate methods so as to provide the required accuracyto meet management plan requirements.In addition, water level loggers, along with flow gauging and sedimentdeposition monitors, will be installed in the creek at the railway bridge anddownstream of the Application Area to monitor changes in the creek due toweather variations, XMO operations and subsidence activity.Drainage Paths and ChannelsA specific management plan has been developed for surface drainage (AnnexE) which identifies the specific monitoring programs designed to identifyENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 20078

changes to drainage paths and channels resulting from subsidence. Themonitoring of subsidence impacts will comprise three phases and will beundertaken prior to mining the establish baseline data, during mining toidentify any subsidence impacts and implement management measures, andat the completion of mining to establish that no further subsidence impacts arelikely. The Surface Drainage Subsidence Management Plan was developedbased on the outcomes of consultation with the landowners and advice fromspecialist consultants.Aquifers and GroundwaterNo registered groundwater extraction bores are located in the ApplicationArea and no adverse effects are anticipated (see Section 7.3.1 of the SMPApplication – Written Report). Consequently, no specific monitoring has beenrecommended.Land Prone To InundationA specific management plan has been developed for surface drainage (AnnexE) which identifies the specific monitoring programs for ponding resultingfrom subsidence. The Surface Drainage Subsidence Management Plan wasdeveloped based on the outcomes of consultation with the landowners andadvice from specialist consultants.Water Related EcosystemsNo significant impacts are predicted for water-related ecosystems as a resultof subsidence (see Section 7.3.1 of the SMP Application – Written Report) andno specific monitoring has been recommended.Threatened and Protected SpeciesNo significant impacts are predicted for threatened and protected species as aresult of subsidence (see Section 7.3.1 of the SMP Application – WrittenReport) and no specific monitoring has been recommended.Natural VegetationNo significant impacts are predicted for natural vegetation as a result ofsubsidence (see Section 7.3.1 of the SMP Application – Written Report) and nospecific monitoring has been recommended.ENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 20079

Fauna and Fauna HabitatNo significant impacts are predicted for fauna and their habitats as a result ofsubsidence (see Section 7.3.1 of the SMP Application – Written Report) and nospecific monitoring has been recommended.6.4 PUBLIC UTILITIESForest RoadA specific management plan has been developed for Forest Road (Annex C)which identifies specific monitoring programs for subsidence impacts. Preminingmonitoring will comprise documented visual inspections of the roadto record any existing damage/issues. Monitoring during mining willcomprise documented daily visual inspections of the potentially affectedsection of Forest Road when the longwall face is approaching within 50m, andcontinuing until the face is 200m past, and at the completion of mining toestablish that no further subsidence impacts are likely. The Forest RoadSubsidence Management Plan was developed in consultation with SingletonShire Council and the Department of Lands.Electricity Transmission LinesA specific management plan has been developed for the electricitytransmission line within the Application Area (Annex B) which identifies thespecific monitoring programs for subsidence impacts. The monitoring ofsubsidence impacts will comprise three phases and will be undertaken priorto mining to record pre-mining status, including condition and tilt of thepoles, during mining to identify any subsidence impacts and implementmanagement measures, and at the completion of mining to establish that nofurther subsidence impacts are likely. The Electricity Transmission LineSubsidence Management Plan was developed based on previous experienceundermining transmission lines on GCCM’s lease and consultation withEnergyAustralia.Telecommunication LinesA specific management plan has been developed for the Telstra assets withinthe Application Area (Annex A) which includes a subsidence monitoringprogram. Prior to mining, line testing on the spare pairs in the 10 and 6 paircable across the Application Area will establish the baseline condition of thecable, with the test being repeated at the completion of each longwall panel.If significant surface subsidence is observed during routine monitoring,physical inspection of the network will be undertaken. The Telstra AssetsENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 200710

Subsidence Management Plan was developed in consultation with atelecommunications consultant and has been approved by Telstra.6.5 FARM LAND AND FACILITIESAgricultural LandNo significant impacts are predicted for agricultural land as a result ofsubsidence (see Section 7.3.3 of the SMP Application – Written Report) and nospecific monitoring has been recommended. However, monitoring of BettysCreek, surface drainage and specific features such as fences, gates and farmdams as described below, would also serve to monitor potential indirectimpacts on agricultural land as a consequence of subsidence. Thesemonitoring strategies have been consolidated in the Land Management Plan(Annex F).Farm BuildingsA specific management plan has been developed for farm buildings within theApplication Area (Annex G) which includes a subsidence monitoring program.The monitoring of subsidence impacts will comprise three phases and will beundertaken prior to mining the record the pre-mining status of the buildings,during mining to identify any subsidence impacts and implementmanagement measures, and at the completion of mining to establish that nofurther subsidence impacts are likely.Prior to undermining the steel framed farm shed located above Longwall 10,the specific management plan will be refined based on the status of thebuilding at that time.The disused dwelling located over the chain pillar between Longwalls 10 and11 is in poor condition and is understood, through the consultation processwith XMO, to be earmarked for demolition prior to undermining. If it is stillstanding when the area is undermined, the subsidence movements areconsidered manageable and would not be expected to significantly change thecurrent status of the structure.Fences and GatesA specific management plan has been developed for farm fences within theApplication Area (Annex H) which identifies the specific monitoring programsfor subsidence impacts. The monitoring of subsidence impacts will comprisethree phases and will be undertaken prior to mining to record the pre-miningstatus of the fences/gates, during mining to identify any subsidence impactsand implement management measures, and at the completion of mining toENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 200711

establish that no further subsidence impacts are likely. The Farm FencesSubsidence Management Plan was developed based on previous experienceundermining fences and in consultation with the landowners.Farm DamsA specific management plan has been developed for farm dams within theApplication Area (Annex I) which identifies the specific monitoring programfor subsidence impacts. Pre-mining surveys of each accessible dam willestablish the shape, wall height, level of the spillway (if present), depth,storage capacity, pH and EC. Weekly inspections of the potentially affecteddams will be undertaken during mining to allow the implementation ofsubsidence impact management processes as required. The Farm DamsSubsidence Management Plan was developed based on previous experienceundermining dams and in consultation with landowners.6.6 INDUSTRIAL, COMMERCIAL AND BUSINESS ESTABLISHMENTSRavensworth East PitThe subsidence impacts on the Ravensworth East Open Cut are likely to beinsignificant and imperceptible for all practical purposes because it is locatedlargely outside the Application Area.Ravensworth East has mined two shallow box cuts (tailings pits) up to 35mbelow the surface. As indicated within the Mt Owen EIS (Umwelt, 2003) andthe Mt Owen Complex MOP (2006), the southern tailings pit (TP2) is locatedwithin the north western portion of the Application Area, over Longwalls 15to 17. The northern portion (outside of the Application Area) has beenpartially backfilled.The Mt Owen Complex MOP (2006) has identified the southern tailings pit asan emplacement area until 2010. The ‘Staged Mining and Rehabilitation Planas at Year 2010’ identifies the southern portion of the TP2, above Longwalls 15to 17, as ‘proposed future tailings emplacement area – subject to Section 126Application’ (Mt Owen MOP, 2006). The proposed GCCM operations will notundermine the southern tailings pit until late 2011, but the final use of thesouthern tailings pit at that date cannot be confirmed.In the event that the pit is proposed to be used for a tailings dam, theproposed changes will need to be the subject of further development approval(Mt Owen MOP, 2006). These changes would need to be assessed by XMO/Xstrata and considered by the approval body having regard to all informationavailable at that time, including this SMP if approved.ENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 200712

In this instance, the principal impacts of subsidence on the Ravensworth EastTailings Pit (TP2) are likely to be differential vertical subsidence with potentialfor the tailings to overtop the perimeter embankments. Without specific detailof the pit geometries, it is difficult to be precise about the likely subsidenceimpacts. However, there would not appear to be any impediment tomanaging these impacts through control of the tailings level and building upof the perimeter bunds potentially subject to vertical subsidence.GCCM has prepared a specific management plan for the Ravensworth EastTailings Pit (Annex J). Under the terms of the Deed, XMO is not permitted toobject to DPI or any other person about this SMP which will include themanagement plan for the Ravensworth East Tailings Pit. GCCM willcooperate with XMO to accommodate any reasonable changes arising fromtheir operational requirements up to the point that such changes do notimpede GCCM's ability to extract the coal and maximise the reserves in themanner that its mining lease requires.Glendell Open Cut and Haul RoadSubsidence impacts on the Glendell Open Cut are likely to be insignificant andimperceptible for all practical purposes because it is located outside theApplication Area. Consequently, no specific monitoring has beenrecommended.Similarly, the Glendell haul road is not expected to be perceptibly affected bymining subsidence and no specific monitoring has been recommended.The edges of the proposed Glendell overburden dump would be expected toexperience vertical subsidence up to about 1.5m. Some lateral dilation of thedump slopes would be expected and surface cracking may be evident near thetop of the slope. If there is considered to be potential for slope instability inthis area, impacts can be managed by inspection and filling of any open cracksat the completion of each of Longwalls 14 to 16 (SCT, 2006).Glendell has accepted liability for subsidence damage which might be causedto its overburden dump by reason of GCCM's undermining. Specifically, inthe MPLA Agreement (dated 1996), Glendell agreed to:indemnify MMC against all claims costs demands losses or expenses suffered byGlendell for which MMC would otherwise be liable in connection with damage tothe emplacement due to subsidence arising out of or in connection with MMC'sunderground mining activities carried out under CL 382 on the Land providedthat the mining is carried out my MMC in accordance with approvals from theDepartment of Mineral Resources.Managing and repairing any subsidence damage to the overburden dump istherefore the responsibility of Glendell and no specific monitoring has beenrecommended.ENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 200713

Mt Owen West DumpIt has been recommended by SCT (2006) that the impacts of miningsubsidence on the West Dump are assessed once the mining geometries andtiming of the proposed activities are better defined. The Mt Owen ComplexMining Operations Plan (MOP) dated January 2006 indicates that the area ofthe West Dump overlying the SMP Application Area will be rehabilitated in2009/2010. In this instance, the West Dump would not be impacted bysubsidence and no specific monitoring programs would be required.In the event that rehabilitation has not been completed, there would beexpected to be some potential for instability of the rock slopes due tosubsidence, although it is anticipated that these would be manageable.GCCM will provide monitoring data and other subsidence information toXMO to ensure that appropriate monitoring strategies can be developedwhere required.Mt Owen Eastern Rail PitIn the event that the Eastern Rail Pit is backfilled and rehabilitated prior toundermining as indicated within the Mt Owen EIS (Umwelt, 2003), theproposed longwall mining will not create a risk for either GCCM or XMOoperations (Umwelt, 2004d).In the event that the pit is used for a tailings dam as indicated by Xstrataduring the consultation process for this SMP and the Mt Owen ComplexMining Operations Plan (MOP) dated January 2006, the proposed changes willneed to be the subject of further development approval. These changes wouldneed to be assessed by XMO / Xstrata and considered by the approval bodyhaving regard to all information available at that time, including this SMP ifapproved. In this instance there would be expected to be some potential forinstability of the rock slopes due to subsidence. Inflows into the overburdenare likely to be reduced by sealing. Vertical subsidence may make it necessaryto build up the level of embankment control structures if the tailings dam isclose to full.GCCM has prepared a subsidence management plan for the Eastern Rail Pit,on the basis of consultation with Xstrata (Annex K). Under the terms of theDeed, XMO is not permitted to object to DPI or any other person about thisSMP which will include the management plan for the Eastern Rail Pit. GCCMwill cooperate with XMO to accommodate any reasonable changes arisingfrom their operational requirements up to the point that such changes do notimpede GCCM's ability to extract the coal and maximise the reserves in themanner that its mining lease requires.ENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 200714

Mt Owen Rail Spur Line and Associated InfrastructureThe Mt Owen Rail Spur and associated infrastructure has been identified asthe main surface improvement that is likely to be impacted by subsidencewithin the Application Area.It is considered likely that the Rail Spur would be able to remain serviceablethroughout the period of mining with frequent monitoring and restressing ofthe rails from time to time likely to be required. The monitoring andmanagement experience during the mining of Longwalls 7 to 9 will betterdefine the nature and frequency of remedial work that would be anticipated.Subsidence monitoring is also recommended, to confirm that actualsubsidence impacts are within the predictions. A similar monitoring regimeto that contained in the Rail Line Management Plan for longwalls 7 to 9 isconsidered appropriate, and will be specified in the Rail Line ManagementPlan for LW 10-17 which will be submitted separately. The monitoringrecommended for Longwalls 11 to 17 is likely to be much reduced from theinitial monitoring over Longwalls 7 to 10 (SCT, 2006). Monitoring ofsubsidence impacts on the Rail Line will be the responsibility of XMO.Bridges over Bettys CreekA better indication of the strains and tilts at the bridges over Bettys Creek willbe available from monitoring previously undermined sections of the Mt OwenRail Spur prior to mine subsidence impacting on the bridge structuresthemselves. The structure of the bridges, ie deck beams supported on pilecaps, is such that the peak horizontal and tilt movements are likely to be ableto be accommodated. The bridge structures would need to be inspected toconfirm how much relative movement can be accommodated.Prior to undermining the Mt Owen Rail Spur a specific management planincorporating the bridges over Bettys Creek will be developed based onprevious experience of monitoring over Longwalls 7 to 9. The development ofthe management plan at a later stage will allow more detailed and appropriatemonitoring strategies to be developed as a result of previous experience.Rail Maintenance RoadSubsidence is not expected to significantly affect the serviceability of theunsealed rail maintenance road and consequently no additional monitoringbeyond the current inspection regime employed by the Rail Maintainer hasbeen recommended.ENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 200715

Buried Rail Communications CablePrior to undermining the Mt Owen Rail Spur a specific management planincorporating the buried communications cable will be developed based onprevious experience of monitoring over Longwalls 7 to 9. The development ofthe management plan at a later stage will allow more detailed and appropriatemonitoring strategies to be developed as a result of previous experience.Mt Owen Water PipelinePrior to undermining the Mt Owen Rail Spur a specific management planincorporating the water pipeline will be developed based on previousexperience of monitoring over Longwalls 7 to 9. The development of themanagement plan at a later stage will allow more detailed and appropriatemonitoring strategies to be developed as a result of previous experience.6.7 AREAS OF ARCHAEOLOGICAL AND/OR HERITAGE SIGNIFICANCEArchaeological SitesA specific management plan has been developed for Archaeological Sites(Annex L) which details monitoring programs for subsidence–related impactsand their remediation. The pre-mining monitoring will comprise an initialdocumented survey and photographic record of each archaeological site toestablish and record condition and any existing damage/issues. Monitoringwithin predicted subsidence impact zones during mining will allow theimplementation of subsidence impact management processes, application ofany permits and remediation works as required. The plan was developedbased on consultation with the Aboriginal community representatives andadvice from specialist consultants.6.8 RELEVANCE AND ADEQUACY OF MONITORING PROCESSESAs noted in Sections 6.3 to 6.7, each of the identified features which requiredetailed monitoring have their own specific monitoring programs andregimes. The intensity of monitoring for each feature is appropriate to thelevel of potential subsidence-related impact and was based on riskassessment, stakeholder consultation and expert advice.The subsidence monitoring lines have been located to measure the varioussubsidence parameters as a result of mining Longwalls 10 to 17. These lineswill be surveyed at the completion of each longwall panel to allow processingof subsidence data for the particular panel.ENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 200716

The monitoring processes described in this SMP are relevant and adequate forthe predicted subsidence impacts.6.9 SUBSIDENCE REPORTING6.9.1 Regular ReportingIn addition to community reporting as part of the ongoing communityconsultation process, a summary of subsidence monitoring results andaccompanying analyses will be reported to the Principal Subsidence Engineerfollowing the completion of each longwall panel. Monitoring results andanalyses will also be included within the mine’s Annual EnvironmentalManagement Report (AEMR).All reports will include a comparison of predicted subsidence with actualdata, including impacts on features being monitored as per this SMP.6.9.2 Significant Incidents and/or VariationsAny significant incidents or variations to predicted subsidence or subsidencerelatedimpacts will be reported to the Director, Environmental Sustainabilityand/or the Principal Subsidence Engineer within 48 hours of being quantified.6.10 RELEVANCE AND ADEQUACY OF REPORTING PROCESSESAs noted in Section 6.9.1, a summary of all subsidence and environmentalmonitoring data and associated analyses will be reported to the PrincipalSubsidence Engineer at the completion of each longwall. The reportingprocesses described in this SMP are relevant and adequate for the predictedsubsidence impacts.ENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 200717

7 SUBSIDENCE MANAGEMENT PROCESSES7.1 NATURAL FEATURESBettys CreekGiven that much of the upper catchment of Bettys Creek will be diverted aspart of the Stage 3 XMO diversion, no specific rehabilitation measures areproposed for the natural channel of Bettys Creek or its floodplain. However, aspecific management plan has been developed for Bettys Creek, including theproposed XMO diversion (Annex D).Should significant subsidence-related impacts be detected through monitoringand/or opportunistic inspections, a management process will be developed inconsultation with relevant stakeholders in order to minimise the impacts anddetermine appropriate remediation works required to return the creek,diversion channel and floodplain to a similar state as existed prior tosubsidence.Drainage Paths and ChannelsA specific management plan has been developed for surface drainage (AnnexE) which identifies specific management and remediation measures. Shouldsignificant subsidence-related impacts be detected through the specifiedmonitoring or opportunistic inspections, a management process will bedeveloped in consultation with relevant stakeholders, in order to minimise theimpacts and determine appropriate remediation works required to return thesurface water drainage system to a similar state as existed prior to subsidence.This may include, but is not limited to, draining ponded areas, re-establishingdrainage paths or diverting surface water flows from areas of potentialponding.Aquifers and GroundwaterNo registered groundwater extraction bores are located in the ApplicationArea and no adverse effects are anticipated (see Section 7.3.1 of the SMPApplication – Written Report). Consequently, no specific managementmeasures have been recommended.Land Prone To InundationA specific management plan has been developed for surface drainage (AnnexE) which identifies the specific management and remediation measures forponding resulting from subsidence. Should significant subsidence-relatedENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 200718

impacts be detected through the specified monitoring or opportunisticinspections, a management process will be developed in consultation withrelevant stakeholders, in order to minimise the impacts and determineappropriate remediation works required to return the surface water drainagesystem to a similar state as existed prior to subsidence.Water Related EcosystemsNo significant impacts are predicted for water related ecosystems as a result ofsubsidence (see Section 10.3.6 of the SMP Application – Written Report) andno specific management measures have been recommended.Threatened and Protected SpeciesNo significant impacts are predicted for threatened and protected species as aresult of subsidence (see Section 10.3.7 of the SMP Application – WrittenReport) and no specific management measures have been recommended.Should significant subsidence-related impacts be detected throughopportunistic inspections, a management process will be developed inconsultation with the relevant stakeholders and government agencies in orderto minimise the impacts and determine appropriate remediation works.Natural VegetationNo significant impacts are predicted for natural vegetation as a result ofsubsidence (see Section 10.3.8 of the SMP Application – Written Report) andno specific management measures have been recommended.Should significant subsidence-related impacts be detected throughopportunistic inspections, a management process will be developed inconsultation with the relevant stakeholders and government agencies in orderto minimise the impacts and determine appropriate remediation works.Fauna and Fauna HabitatNo significant impacts are predicted for fauna and their habitats as a result ofsubsidence (see Section 10.3.9 of the SMP Application – Written Report) andno specific management measures have been recommended.Should significant subsidence-related impacts be detected throughopportunistic inspections, a management process will be developed inconsultation with the relevant stakeholders (including landowners andgovernment agencies) in order to minimise the impacts and determineappropriate remediation works.ENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 200719

7.2 PUBLIC UTILITIESForest RoadA specific management plan has been developed for Forest Road (Annex C)which identifies specific management measures for subsidence impacts via aresponse action matrix. The Forest Road Subsidence Management Plan wasdeveloped in consultation with Singleton Shire Council and the Department ofLands.Electricity Transmission LinesA specific management plan has been developed for the electricitytransmission line within the Application Area (Annex B) which identifies thespecific management measures in the event of subsidence impacts. In theevent that the transmission line is damaged, repairs will be instigated as soonas practicable by GCCM, in consultation with EnergyAustralia. The ElectricityTransmission Lines Subsidence Management Plan was developed based onprevious experience undermining transmission lines on GCCM’s lease andconsultation with EnergyAustralia.Telecommunication LinesA specific management plan has been developed for the Telstra assets withinthe Application Area (Annex A) which includes a specific subsidencemanagement/monitoring program. The Telstra Assets SubsidenceManagement Plan was developed in consultation with a telecommunicationsconsultant and has been endorsed by Telstra.7.3 FARM LAND AND FACILITIESAgricultural LandNo significant impacts are predicted for agricultural land as a result ofsubsidence (see Section 10.5.1 of the SMP Application – Written Report) andno specific management measures have been recommended.Should significant subsidence-related impacts be detected throughopportunistic inspections, a management process will be developed inconsultation with the relevant stakeholders (including landowners andgovernment agencies) in order to minimise the impacts and determineappropriate remediation works. Specific management plans are in place forrelated aspects such as Bettys Creek, surface drainage, farm buildings, fencesENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 200720

and gates and farm dams. These management strategies have beenconsolidated and provided in the Land Management Plan (Annex F).Farm BuildingsIf the disused dwelling still standing when the area is undermined, thesubsidence movements are considered manageable and would not beexpected to significantly change the current status of the structure (Annex G).Prior to undermining the steel framed farm shed located above Longwall 10,the specific management plan will be refined based on the status of thebuilding at that time. Management of the shed is achievable as demonstratedthrough the development of the following preliminary management options.• Leave it in place and monitor its behaviour with a view to repairing it ortotally replacing it if it became unserviceable, or• Disassemble it and reconstruct it again after subsidence is complete, withtemporary cover provided for storage in the interim.Fences and GatesA specific management plan has been developed for farm fences and gateswithin the Application Area (Annex H) which identifies the specificmanagement measures for subsidence impacts. Should subsidence-relateddamage to a fence risk unplanned stock movements and the damage is suchthat immediate repairs are not possible, or there is a risk of unplanned stockmovements whilst repairs are carried out, GCCM will supply and installtemporary electric fencing in consultation with the landowner. The FarmFences Subsidence Management Plan was developed based on previousexperience undermining fences and gates, and in consultation with thelandowners.Farm DamsA specific management plan has been developed for farm dams within theApplication Area (Annex I) which identifies the specific managementmeasures for subsidence impacts. GCCM will, in consultation with therelevant landowner, restore any dam that is damaged by subsidence or has itsstorage capacity reduced by more than 10 percent to a condition similar to thedam’s pre-subsidence condition. Should water be lost from a dam to theextent that livestock are impacted, an alternative water supply will beprovided by GCCM, in consultation with the landowner. The Farm DamsSubsidence Management Plan was developed based on previous experienceundermining farm dams and in consultation with landowners.ENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 200721

7.4 INDUSTRIAL, COMMERCIAL AND BUSINESS ESTABLISHMENTSRavensworth East PitA specific management plan has been developed for the Ravensworth EastTailings Pit (TP2) within the Application Area (Annex J). GCCM will providemonitoring data and other subsidence information to XMO to ensure thatappropriate management strategies can be developed.The Mt Owen Complex MOP (2006) has identified the southern tailings pit asan emplacement area until 2010. The ‘Staged Mining and Rehabilitation Planas at Year 2010’ identifies the southern portion of the TP2, above Longwalls 15to 17, as ‘proposed future tailings emplacement area – subject to Section 126Application’ (Mt Owen MOP, 2006). The proposed GCCM operations will notundermine the southern tailings pit until late 2011, but the final use of thesouthern tailings pit at that date cannot be confirmed. Without specific detailof the geometries and status of the pit when it is due to be undermined, it isdifficult to be precise about the likely subsidence impacts. However, therewould not appear to be any impediment to managing these impacts throughcontrol of the tailings level and building up of perimeter bunds subject tovertical subsidence.GCCM has prepared a specific management plan for the Ravensworth EastTailings Pit (Annex J). Under the terms of the Deed, XMO is not permitted toobject to DPI or any other person about this SMP which will include themanagement plan for the Ravensworth East Tailings Pit. GCCM willcooperate with XMO to accommodate any reasonable changes arising fromtheir operational requirements up to the point that such changes do notimpede GCCM's ability to extract the coal and maximise the reserves in themanner that its mining lease requires.Glendell Open Cut and Haul RoadSubsidence impacts on the Glendell Open Cut are likely to be insignificant andimperceptible for all practical purposes because it is located outside theApplication Area and no specific management measures have beenrecommended.Similarly, the Glendell haul road is not expected to be perceptibly affected bymining subsidence and no specific management measures have beenrecommended.The edges of the Glendell overburden dump, as indicated in their latestApplication to Carry Out Open Cut Mining Operation dated February 1998,would be expected to experience vertical subsidence up to about 1.5m. Somelateral dilation of the dump slopes would be expected and surface crackingmay be evident near the top of the slope. It is assumed that any futureENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 200722

application for mining approval would need to be developed by Xstrata, andconsidered by the approval body, having regard to all information available atthat time, including this SMP if approved.Glendell has accepted liability for subsidence damage which might be causedto its overburden dump by reason of GCCM's undermining. Specifically, inthe MPLA Agreement, Glendell agreed to:indemnify MMC against all claims costs demands losses or expenses suffered byGlendell for which MMC would otherwise be liable in connection with damage tothe emplacement due to subsidence arising out of or in connection with MMC'sunderground mining activities carried out under CL 382 on the Land providedthat the mining is carried out my MMC in accordance with approvals from theDepartment of Mineral Resources.Managing and repairing any subsidence damage to the overburden dump istherefore the responsibility of Glendell and no specific management strategieshave been recommended.Mt Owen West DumpThe Mt Owen Complex Mining Operations Plan (MOP) dated January 2006indicates that the area of the West Dump overlying the SMP Application Areawill be rehabilitated in 2009/2010. In this instance, the West Dump would notbe impacted by subsidence and no specific management strategies have beenrecommended.Mt Owen Eastern Rail PitIn the event that the Eastern Rail Pit is backfilled and rehabilitated prior toundermining as indicated within the Mt Owen EIS (Umwelt, 2003), theproposed longwall mining will not create a risk for either GCCM or XMOoperations (Umwelt, 2004d).In the event that the pit is used for a tailings dam, the proposed changes willneed to be the subject of further approval and such changes would need to beassessed by XMO/Xstrata, and considered by the approval body, havingregard to all information available at that time, including this SMP ifapproved. In this instance there would be expected to be some potential forinstability of the rock slopes due to subsidence.GCCM has prepared a subsidence management plan for the Eastern Rail Pit,on the basis of consultation with Xstrata (Annex K). Under the terms of theDeed, XMO is not permitted to object to DPI or any other person about thisSMP which will include the management plan for the Eastern Rail Pit. GCCMwill cooperate with XMO to accommodate any reasonable changes arisingfrom their operational requirements up to the point that such changes do notENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 200723

impede GCCM's ability to extract the coal and maximise the reserves in themanner that its mining lease requires.Mt Owen Rail SpurSimilar management strategies to those contained in the Rail LineManagement Plan for Longwalls 7 to 9 is considered appropriate, and will bespecified in the Rail Line Management Plan for LW 10-17 which will besubmitted separately. Management of subsidence impacts on the Rail Linewill be the responsibility of XMO.It is likely that the Rail Spur would be able to remain serviceable throughoutthe period of mining with frequent monitoring and restressing of the railsfrom time to time likely to be required.Bridges over Bettys CreekThe specific Mt Owen Rail Spur Subsidence Management Plan incorporatingthe bridges over Bettys Creek will be developed based on the results ofmonitoring over Longwalls 7 to 9. The development of the management planat this stage will allow more detailed and appropriate management strategiesto be developed on the basis of previous experience.Rail Maintenance RoadSubsidence is not expected to significantly affect the serviceability of theunsealed rail maintenance road and no specific management measures havebeen recommended. If cracks or compression humps develop, crack fillingand regrading may be required and will be included in the specific Mt OwenRail Spur Subsidence Management Plan.Buried Rail Communications CableA specific Mt Owen Rail Spur Management Plan incorporating the buriedcommunications cable will be developed based on the experience ofmonitoring over Longwalls 7 to 9. The development of the management planat a later stage will allow more detailed and appropriate managementstrategies to be developed as a result of previous experience.Mt Owen Water PipelineThe specific Mt Owen Rail Spur Subsidence Management Plan incorporatingthe water pipeline will be developed based on the results of monitoring overLongwalls 7 to 9. The development of the management plan at this stage willENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 200724

allow more detailed and appropriate management strategies to be developedon the basis of previous experience.7.5 AREAS OF ARCHAEOLOGICAL AND/OR HERITAGE SIGNIFICANCEArchaeological SitesA specific management plan has been developed for Archaeological Sites(Annex L) which details management measures for subsidence-related impactsand their remediation. It was developed based on consultation withAboriginal community representatives and advice from specialist consultants.Should a site be potentially impacted by remedial earthworks required as aconsequence of subsidence, a Section 90 permit (under the National Parks andWildlife Act 1974) will be obtained prior to undertaking the required works.7.6 RELEVANCE AND ADEQUACY OF MANAGEMENT PROCESSESThe subsidence management processes described in this SMP are relevant andadequate for the predicted subsidence impacts for each identified feature. Thesubsidence monitoring regimes for the identified features will ensure the earlydetection of any adverse impacts so management processes can beimplemented to manage the issues in a timely manner.It is likely that the proposed subsidence management strategies will besuccessful as they involve a combination of:• ongoing stakeholder consultation to identify and manage concerns;• monitoring of subsidence development and impacts; and• management options to address potential impacts.Appropriate contingency plans should an unwanted event occur (eg supply ofwater should a dam fail) have been developed where necessary.ENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 200725

8 SPECIFIC MANAGEMENT PLANSTen specific management plans have been developed as part of this SMP toaddress the management of potential subsidence-related impacts identified asbeing of concern to the various stakeholders.Each of the specific management plans have been developed as a componentof this SMP, including subsidence predictions, assessments of potentialimpacts, and management and monitoring processes. This approach allowsfor ease of application and an ability to refine individual plans on the basis ofoperational experience. All of these management plans are based on thelandowners providing access to each of the identified features.The specific management plans are as follows.• Telstra Assets (Annex A);• Electricity Transmission Lines (Annex B);• Forest Road (Annex C);• Bettys Creek (Annex D);• Surface Drainage (Annex E);• Land Management (Annex F);• Farm Building Management Plan (Annex G);• Farm Fences (Annex H);• Farm Dams (Annex I);• Ravensworth East Tailings Pit (TP2) (Annex J);• Mt Owen Eastern Rail Pit (Annex K); and• Archaeology (Annex L).The Mt Owen Rail Spur Management Plan will be developed prior toundermining and submitted to the DPI separately. Previous experience andmonitoring over Longwalls 7 to 9 will also be essential in developing thismanagement plan.ENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 200726

9 PUBLIC SAFETY MANAGEMENT PLANA Public Safety Management Plan has been developed as part of this SMP andis included as Annex M.The Public Safety Management Plan addresses a number of potential hazardsto persons arising from subsidence as identified through the risk assessmentprocess, including:• farm dams failing;• surface cracking (excluding Forest Road);• damage to Forest Road;• livestock escape onto Forest Road;• downed electricity transmission lines; and• damage to the Mt Owen Rail Spur.ENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 200727

10 RESPONSIBILITIESThe following sub-sections identify the responsibility of various GCCMpersonnel and stakeholders.10.1 GGCM10.1.1 Mine Manager• Ensure that this SMP and associated specific management plans areimplemented and adhered to.• Ensure that adequate resources are available to GCCM personnel to allowthe completion of their responsibilities under this SMP.10.1.2 Technical Services Manager• Ensure that all subsidence monitoring and reporting required under thisSMP is carried out within the timeframes specified.• Ensure that the ongoing community consultation processes detailed in thisSMP are carried out.• Liaise with Xstrata/XMO regarding the management of the Mt Owen RailSpur, Mt Owen Water Pipeline, Mt Owen Eastern Rail Pit, RavensworthEast Pit and Glendell Mine. Consultation will include:• ensuring GCCM's provision of subsidence-related information and dataas required in this SMP (and appended management plans) toXstrata/XMO; and• receiving technical comments regarding the subsidence impacts on thesurface features.• Ensure that audits and reviews are carried out as detailed in this SMP.10.1.3 Safety, Training and Environment Manager• Ensure that all environmental monitoring associated with this SMP iscarried out within the timeframe specified.• Ensure that all environmental monitoring results are checked, processedand filed appropriately so that they can be immediately identified andaccessed.ENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 200728

10.1.4 Mine Surveyor• Ensure that all subsidence surveys are carried out to the accuracy requiredand within the time specified.• Ensure that all subsidence survey results are checked, processed and filedappropriately so that they can be immediately identified and accessed.10.1.5 Environmental Advisor• Maintain the Community Complaints Register.• Liaise with stakeholders regarding subsidence impact management.10.1.6 Private Landowners• Notify GCCM of any concerns or issues related to subsidence via theenvironmental hotline.• Participate in the management / rectification of any actual subsidencerelatedimpacts on their land.10.1.7 Xstrata/XMO• Operationally manage and respond to all subsidence impacts on the MtOwen Rail Spur having regard to the subsidence-related information anddata provided by GCCM.• Participate in ongoing consultation regarding the management ofsubsidence impacts on the Mt Owen water pipeline and provide access tothe pipeline.• Participate in ongoing consultation regarding the management ofsubsidence impacts on, and operationally manage and respond to allsubsidence impacts on, the Mt Owen Eastern Rail Pit, Mt Owen WestDump, Ravensworth East Tailings Pit and Glendell Mine.• Notify GCCM of any concerns or issues related to subsidence via theenvironmental hotline.• Participate in the management of any actual subsidence-related impacts ontheir land, including the provision of access for subsidence monitoring.ENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 200729

10.1.8 Telstra• Participate in ongoing consultation regarding the management ofsubsidence-related impacts on the Telstra assets.• Undertake the rectification of any actual subsidence-related impacts on theTelstra assets.10.1.9 Energy Australia• Undertake the rectification of any actual subsidence-related impacts on theelectricity transmission lines.10.1.10 Singleton Shire Council• Participate in ongoing consultation regarding the management ofsubsidence-related impacts on the Shire's portion of Forest Road.• Participate in the rectification of any actual subsidence impacts on theShire's portion of Forest Road.10.1.11 Department of Lands• Participate in ongoing consultation regarding the management ofsubsidence-related impacts on the Crown road portion of Forest Road.• Participate in the management of any actual subsidence-related impacts onthe Crown road portion of Forest Road.10.1.12 Other Stakeholders• Notify GCCM of any concerns or issues related to subsidence via theenvironmental hotline.ENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 200730

11 AUDIT AND REVIEW11.1 AUDITAs a minimum, an audit of this SMP and associated specific managementplans will be carried out at the completion of each of Longwalls 10 to 17.The audit will assess performance against the commitments within this SMPand associated specific management plans, as well as any conditions ofapproval from the Director, Environmental Sustainability.11.2 REVIEWAs a minimum, a review of this SMP and associated specific managementplans will be carried out at the completion of each of Longwalls 10 to 17, iefollowing the audit.The review will assess the SMP and associated specific management plans interms of management responses and overall practicality. Refinements to theSMP and associated specific management plans will be introduced asappropriate.ENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 200731

REFERENCESNSW Minerals Council (1995) Guidelines for Best Practice CommunityConsultation in New South Wales Mining and Extractive Industries.Cambridge Press Pty Ltd.SCT Pty Ltd (2006) Subsidence Assessment for Longwalls 10 to 17 atGlennies Creek Colliery. Prepared for Glennies Creek Coal Management PtyLtd, July 2006.ENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA 0038321/FINAL/3 JANUARY 200732

Application for Subsidence Management ApprovalSubsidence Management PlanANNEXURES

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