MINING OPERATIONS PLAN INTEGRA MINE UNDERGROUND OPERATIONS CARE & MAINTENANCE

Transcription

1 Mining Operations lan Integra Coal Operations ty Ltd MINING OERATIONS LAN INTEGRA MINE UNDERGROUND OERATIONS CARE & MAINTENANCE Doc No: INTEGRA UNDERGROUND CARE & MAINTENANCE MO Doc Owner: Approval: Signed: Date:

2 Revision Issue Date Originator Reviewed Approved Draft 1 07/07/2014 Dan Byrne/Steve Beikoff Shane Flint Shane Flint Revision 2 add page numbers, footer, correct reference errors in Table of Contents 08/07/2014 Dan Byrne Shane Flint Shane Flint Final 19/11/2014 Catherine Suggate Chris Quinn Chris Quinn Integra Underground (Glennies Creek Colliery) age 2

3 INTEGRA UNDERGROUND Mining Operations lan Name of Mine Integra Underground (Glennies Creek) MO Commencement Date 1 September 2014 MO Completion Date 31 August 2017 Mining Authorisations (Lease / Licence No.) Name of Authorisation / Authorisation holder(s) Name of Mine Operator (if different) CL 382, ML 1551, ML 1525, ML 1518, ML1437, ML1676, ML1630 & EL 5824 Maitland Main Collieries ty Ltd, Toyota Tsusho Mining (Australia) ty Ltd, NS Glennies Creek ty Ltd, OS-GC ty Ltd, Chubu Electric ower Integra ty Ltd, JS Glennies Creek ty Ltd, JFE Steel Australia (GC) ty Ltd, Vale Australia (GC) ty Ltd Integra Coal Operations ty Ltd Grant Clouten Name and Contact Details of the Mine Manager (or equivalent) Operations Manager Integra Coal Operations ty Ltd 653 Bridgman Rd Singleton NSW Chris Quinn Name and Contact Details of Environmental Representative Environmental Advisor Bridgman Rd Singleton Name of Representative(s) of the Authorisation Holder(s) Title of Representative(s) of the Authorisation Holder(s) Grant Clouten Operations Manager Integra Coal Operations ty Ltd Signature of Representative(s) of the Authorisation Holder(s) Date Draft Final Amended Version /07/ /07/ /11/2014 Integra Underground (Glennies Creek Colliery) age 3

4 C o n t e n t s Summary of Tables, Figures and lans... 7 FOREWORD Introduction History of Operations Current Consents, Authorisations and Licences Land Ownership and Land Use Stakeholder Consultation roposed Mining Activities roject Description Asset Register Activities over the MO Term Exploration Construction Mining Operations (including mining purposes) Rock/overburden emplacement rocessing residues and tailings Waste Management Decommissioning and demolition activities Temporary Stabilisation rogressive rehabilitation and completion Material roduction Schedule during MO Term Environmental Issues Management Environmental Risk Assessment Environmental Risk Management Specific Risks relating to Rehabilitation ost Mining Land Use Regulatory Requirements ost Mining Land Use Goal Rehabilitation Objectives Rehabilitation lanning and Management Domain Selection rimary Domains Secondary Domains Domain Rehabilitation Objectives (Level 1 Mines only) Integra Underground (Glennies Creek Colliery) age 4

5 5.3 Rehabilitation hases erformance Indicators, and Completion/Relinquishment Criteria Rehabilitation Implementation Status at MO Commencement roposed Rehabilitation Activities during the MO Term Summary of Rehabilitation Areas during the MO Term Relinquishment hase achieved during MO period Rehabilitation Monitoring and Research Rehabilitation Monitoring Research and Rehabilitation Trials and Use of Analogue Sites Intervention and Adaptive Management Threats to Rehabilitation Trigger Action Response lan Reporting lans Level 1 Mines (State Significant Development) lans 1A, 1B and 1C roject Locality lan 2 Mine Domains at commencement of MO lan 3A 3G Mining and Rehabilitation lan 4 Final Rehabilitation and ost Mining Land Use lan 5 Rehabilitation and ost Mining Land use Cross Sections Cross Sections Review and Implementation of the MO Review of the MO Implementation Appendices Appendix 1 EL Appendix 2 roject Approval A 08_0101 & Appendix 3 List of Management lans Appendix 4 Rehabilitation Cost Estimate (RCE) Integra Underground (Glennies Creek Colliery) age 5

6 Ta b l e o f F i g u r e s Figure 1-1 Location of Integra Underground Figure 1-2 Land Ownership Figure 2-1 Rehabilitation Features - Underground it-top Facilities area Figure 7-1 Vent Fan Site Rehabilitation Areas Figure 11-1 lan 1Aroject Locality Figure 11-2 lan 1B -re-mining environment - Natural environment Figure 11-3 lan 1C -re-mining environment - Built environment Figure 11-4 lan 2 - Mine Domains at Commencement of MO Figure 11-5 lan 3 Mining and Rehabilitation Figure 11-6 lan 4 - Final Rehabilitation and ost Mining Land Use Figure 11-7 lan 5 - Rehabilitation and ost Mining Land Use Cross-sections Ta b l e s Table 0-1 Tables, Figures and lans... 7 Table 1-1 Approvals, Leases and Licences Table 1-2 Land ownership/tenure for Integra Underground mining lease areas and surrounds Table 1-3 Care and maintenance Mine Operations lan consultation log Table 2-1 Rehabilitation Features - Underground it-top Facilities area Table 2-2 Breakdown of Integra Underground Gaswell Sites Table 2-3 Material roduction Schedule during the MO Term Table 3-1 Risk Assessment Environmental MO Care & Maintenance Activities Table 4-1 Regulatory Requirements for Integra Underground Table 4-2 Land Capability Class Definitions Table 5-1 Coding for primary (operational) and secondary (post mining land use) domains Table 5-2 rimary Domains Table 5-3 Secondary Domains Table 5-4 Rehabilitation hases - rimary Domain based on ost Mining Land Use Table 6-1 Rehabilitation Table for Care & Maintenance MO Table 7-1 rimary Domains Table 7-2 Secondary Domains Table 7-3 Rehabilitation and Disturbance Rates during the life of the C&M MO Table 7-4 Rehabilitation Domains hases Start and End of MO Table 8-1 Rehabilitation Monitoring rogram Table 9-1 Threats to Rehabilitation Table 9-2 TAR for Environmental Harm Table 12-1 MO Review causes, frequency and responsibility Integra Underground (Glennies Creek Colliery) age 6

7 S u m m a r y o f Ta b l e s, F i g u r e s a n d l a n s Table 0-1 Tables, Figures and lans Section of MO Table Reference lan Reference Source Section 2 - Material Table 2-3 Material N/A Mine lanning Team roduction Schedule roduction Schedule during the MO term during the MO Term Section 7.2. Disturbance and Rehabilitation rogression during the MO Term Table 7-3 Rehabilitation and Disturbance Rates during the life of the C&M MO lans 2, 3A- 3G Spatial data Section Summary of Rehabilitation Areas during the MO Table 7-4 Rehabilitation Domains hases Start and End of MO lans 3A - 3G Spatial data Integra Underground (Glennies Creek Colliery) age 7

8 F O R E W O R D The contents of this Mining Operations lan (MO) follow the format identified in the NSW Department of Trade & Investment publication entitled ESG3 Mining Operations lan (MO) Guidelines, September The Integra Underground is not a metalliferous or non-coal mine and is therefore designated as a Level 1 mine. To assist the reader, larger plans referred to in this MO are presented as separate documents, and are to be viewed in conjunction with the written information provided within this MO. This MO is intended to be an interim document submitted to allow for a stage of Care & Maintenance of the Integra Coal Underground during a period of non-operational activity. Integra Underground (Glennies Creek Colliery) age 8

9 1 I n t r o d u c t i o n 1.1 History of Operations Major interest in the development of the coal resource in the area referred to as the Integra Coal Underground commenced in the mid-1970s, with the extensive exploration culminating in the lodgement of a DA for an underground mine in August The DA sought approval for a range of activities including: establishment of initial surface facilities and a box cut seam entry at a site approximately 2 km east of the existing highwall entry (the Barrett Seam Entry); construction and subsequent expansion of a modular CH on a site approximately 1km west of the Surface Facilities Area; construction of a rail loading facility and inclined drift centred adjacent to the CH; coal extraction, initially using continuous miners and subsequently, using longwall methods; and ROM coal extraction increasing from approximately 0.55 Mtpa using continuous miners to approximately 3 Mtpa following the introduction of longwall techniques. Following a Commission of Inquiry in mid-1991, Development Consent (DA 105/90) was granted on 01 November 1991 subject to a total of 26 principal conditions. Although initial mining operations commenced in October 1996, economic circumstances dictated a postponement of major coal mining and processing infrastructure development activities until the latter part of the decade. In the interim, emphasis was placed on undertaking a range of activities required, and investigating alternative methods and arrangements, for a progression into full-scale operations. In August 1998, as a consequence of these investigations, Maitland Main Collieries (MMC) (the then major shareholder in the Integra Coal Underground) lodged a S.96(2) application and accompanying Statement of Environmental Effects (SoEE) with the then Department of Urban Affairs and lanning seeking the Minister's approval for amendments to DA 105/90 to enable: (i) (ii) (iii) (iv) development of an underground entry to CL 382 from the highwall within the mined out North it of the adjoining Camberwell Open Cut Coal roject (now Integra Coal Open Cut); processing of 200,000 t coal extracted through Camberwell Open Cut s Coal Handling and reparation lant ("CH"); despatch of the washed coal via Camberwell Open Cut's train loading facility; and development of site facilities on and adjacent to the former Oak ark School grounds. Integra Underground (Glennies Creek Colliery) age 9

10 The application sought approval to undertake items (ii) and (iii) for a maximum period of three years, i.e. a period which, at the time, was assessed to be sufficient to allow the commencement of production from the mine and the provision of the cash flow and time necessary for: a more detailed geological assessment of the coal resource; the detailed design of the previously-approved Glennies Creek coal preparation plant; the design and acquisition of longwall mining equipment; and the construction of the previously-approved Glennies Creek rail loop and train loading facility, coal preparation plant and other infrastructure necessary for the Glennies Creek Colliery to operate independent of Camberwell Open Cut. The application to amend DA 105/90 was approved on 16 November Following the approval of MMC's application: the area now known as ML 1437 was excised from the north-western corner of Camberwell Open Cut's lease (CL 357) and issued to the Glennies Creek Colliery; and a ollution Control Licence (No. 7622) was issued by the Environment rotection Authority. In December 1999, the ollution Control Licence was converted to an Environmental rotection Licence. EL 7622 was approved for surrender in November 2010 and replaced by a consolidated Complex EL 3390 for both Integra Underground and Open Cut (Appendix 1). On-site activities during this development / assessment phase, including the installation of limited support facilities and infrastructure within the ortal Area and in the vicinity of the former Oak ark Schoolhouse, commenced in December The facilities and infrastructure installed during this period, particularly those within the ortal Area, were positioned and constructed with the objective of supporting the mine s approved operational requirements and achieving appropriate environmental performance whilst minimizing capital expenditure. Underground development commenced in May 1999 and, over the period to May 2000, involved the development of three underground roadways from the ortal Area to a distance approximately 1700 m underground. Five roadways (the North-West Mains lan 3) with interconnecting cut-throughs were then driven in a north-westerly direction. In December 2000, the north-easterly development of two and three heading maingate and tailgate roads commenced in preparation for the introduction of a longwall mining system. Although the 1998 S.96(2) application specified a limited duration for the preparation and despatch of Glennies Creek coal using Camberwell Open Cut facilities, that documentation also identified a commitment by MMC to the ongoing review of its activities as a means of minimizing impacts. As a consequence of this review, an agreement was reached between Glennies Creek and Camberwell Coal for the long-term coal preparation, storage, and rail despatch of Glennies Creek coal using Camberwell Coal s CH facilities. An application (DA DIA M2) to enable the implementation of that agreement was approved on 18 December Integra Underground (Glennies Creek Colliery) age 10

11 Longwall mining in the first, narrow (90 m wide) panel (LW1) commenced in August 2002 and, since that time, with increasing knowledge and understanding of local geological and mining conditions, has progressed through the developmental / viability assessment phase to what now constitutes a modern longwall mining operation. As of 22 April 2014, coal extraction had been completed in anels LW2 to LW12, with development of LW13 maingate complete and maingate driveage in LW14 having commenced. On 25 June 2002, an amendment to DA 105/90 (DA M3) was granted enabling the establishment of a ventilation shaft and associated facility off Forest Road (above the western extremity of the North-Western Mains), plus a private surface power line to that facility. Construction of the ventilation shaft commenced in October 2002 and was completed in April In January 2005, a Section 96 (1A) modification was submitted to enable the upgrade of facilities at the mine portal which included relocation and/or replacement of the existing workshop, fuel storage, fire station and fuel/service/washdown bay located within the ortal Area. This modification was approved in February In February 2005, a Section 96 (2) modification was submitted to enable an increase in Runof-Mine (ROM) coal production to 4.5 Mtpa through continued use of existing mining equipment and personnel. The application, which also covered the installation of limited additional facilities and infrastructure to support and enable more efficient operations, was approved by the Minister for lanning on 1 November On 21 December 2005 the Section 96 (2) modification (essentially the same proposal) was re-submitted due to some concerns regarding notification and consultation process with the original application. This modification was approved on the 20 September In February 2006 a Section 3(A) modification was submitted that incorporated a number of changes to the surface facilities infrastructure at Integra Coal Underground. This modification was approved by the Minister for lanning on the 31 January A art 3(A) application to cover mining in the Middle Liddell Seam for the proposed Longwalls had been submitted to the Department of lanning for adequacy assessment. This application was submitted to cover perceived inadequacies in the original Environmental Impact Statement which were uncovered in the Subsidence Management lan approval process. This application also allowed for the initiation of the approval process for both Hebden and Barrett Seam workings. Other activities which have occurred and are covered by previous Environmental Assessment are: Installation of a new ventilation shaft and gas flare plant. In March 2006 the process of consolidated consent was investigated for Glennies Creek Underground and Camberwell Open Cut. A part 3A application was subsequently submitted and in November 2010 Integra Underground and Open Cut were granted a consolidated Complex development consent A_0101 & 0102 (Appendix 2). Three Modifications have been approved between March 2012 and February Modification 1 approved work associated with North Open Cut pit area, extension of the time frame for installation of an overland conveyor and extension of the time frame related to a Integra Underground (Glennies Creek Colliery) age 11

12 revised Biodiversity Offset Strategy. Modification 2 approved the removal of the overland conveyor and Modification 3 was approved to extend the time frames associated with Mod 2. Over the life of the Colliery to date, Integra Coal Operations (ICO) or its predecessors have submitted a series of Mining Operations lans (MOs), with the most recent MO being valid until March 2015 or the completion of LW17 coal extraction. Due to the decline in economic conditions for coal mining, Integra Underground transitioned to care and maintenance in mid and an Interim Care & Maintenance MO was submitted on the 2 June 2014 and approved from this date until 30 September This MO will supersede the Interim MO. Figure 1-1 Location of Integra Underground Integra Underground (Glennies Creek Colliery) age 12

13 1.2 Current Consents, Authorisations and Licences Integra Underground current consents, authorisations and licences are represented in Table 1-1 Approvals, Leases and Licences. Table 1-1 Approvals, Leases and Licences Type of Lease / Licence/Approval Date of Issue/ Registration Expiry Comments roject Approval (A) 08_ Complex roject Approval combined with Open Cut 08_0102 Coal Lease (CL) Varying surface exemptions Mining Lease (ML) art transfer of CL357 Mining Lease (ML) 1525 (Shaft) Forest Road Ventilation Shaft Area (from 20m to 5m from surface) Mining Lease (ML) Sub-Lease ML 343 was under agreement with Glendell Tenements ty Ltd. Overlies ML 1525(-5m to surface) Exploration Licence Mining Lease (ML) art transfer of CL 357 to be renewed through period of MO Mining Lease (ML) art transfer of CL 357 to be renewed through period of MO Environment rotection Licence 3390 Nov In Force Anniversary Date Approved coal production activity scale of 3.5Mtpa 5.0 Mtpa ossum Skin Dam Concurrence Dam life initially established by DSC as 8 years. Extend life based upon surveillance monitoring Water Access licences In erpetuity For 150 Units In erpetuity For 50 Units In erpetuity For 3 Units In erpetuity For 99 Units In erpetuity For 3 Units In erpetuity For 303 Units In erpetuity For 13 Units In erpetuity For 230 Units held jointly with Integra Coal Open Cut and RHA astoral Co. 20BL In erpetuity Monitoring Bore 20BL In erpetuity Test Bore Integra Underground (Glennies Creek Colliery) age 13

14 Type of Lease / Licence/Approval Date of Issue/ Registration Expiry Comments 20BL In erpetuity Test Bore 20BL In erpetuity Test Bore 20BL In erpetuity Test Bore 20BL In erpetuity Test Bore 20BL Dewatering of Mine Workings 20BL Excavation of underground workings 20BL In erpetuity Bore 20BL In erpetuity Bore 20BL In erpetuity Bore 20BL In erpetuity Bore 20BL In erpetuity Bore 20BL In erpetuity Bore 20BL /2008 In erpetuity Bore 20BL / In erpetuity Bore 20BL In erpetuity Bore 20BL In erpetuity Bore Dangerous Goods Licence 35/ In rogress WorkCover have been contacted regarding the progress of the new licence approval, currently a site inspection by the DI to assess dangerous goods storage / handling and management is required for the application to progress further. Licence to Store XSTR Storage of explosives Integra Underground (Glennies Creek Colliery) age 14

15 1.3 Land Ownership and Land Use An overview of the tenure of the general area is shown in Figure 1-2 Land Ownership. A schedule of land ownership, occupancy, and title over the authorisation area is contained in Table 1-2 Land ownership/tenure for Integra Underground mining lease areas and surrounds. Table 1-2 Land ownership/tenure for Integra Underground mining lease areas and surrounds Lot Number lan Number Owner Type Company Mining Company Mining Company Mining Company Mining Company Mining Individual Mining Company Mining G Company Mining/Grazing Individual Occupied/Grazing Company Mining Company Mining Company Mining Company Mining/Road Company Mining Individual Mining Company Mining Company Road Company Mining Authority Rail Authority Rail Authority Rail Company Mining/Grazing Company Grazing Company Mining Company Mining Company Mining Individual Grazing/Occupied Individual Grazing Company Mining Company Occupied/Grazing Company Mining Authority Rail Company Grazing Company Mining/Other Company Mining Individual Occupied Current Land Occupancy Status/Land Use Integra Underground (Glennies Creek Colliery) age 15

16 Lot Number lan Number Owner Type Individual Occupied Company Mining/Grazing Company Mining Individual Occupied/Grazing Company Mining Company Occupied/Mining Individual Occupied Individual Occupied/Grazing Company Mining Company Mining Company Mining Company Mining Company Mining Company Occupied Company Occupied Individual Occupied/Grazing Company Occupied Current Land Occupancy Status/Land Use Company Mining Company Mining Company Occupied Individual Occupied Individual Occupied Company Mining Company Mining Company Mining/Road Company Occupied Company Occupied Company Mining Company Occupied Company Occupied Company Mining Company Mining Company Mining Company Mining Authority Crown Land Company Mining Individual Occupied/Grazing Company Mining Company Occupied Company Occupied Company Mining Company Mining Company Mining Company Mining Company Grazing/Road Company Mining/Grazing Company Mining Company Mining/Grazing Company Mining/Grazing/Road Integra Underground (Glennies Creek Colliery) age 16

17 Lot Number lan Number Owner Type Current Land Occupancy Status/Land Use Company Mining/Grazing Company Mining Company Grazing Company Mining Company Mining Company Mining Company Mining Company Mining Individual Grazing Individual Grazing Individual Grazing Individual Occupied Individual Occupied Individual Occupied Individual Occupied Company Grazing Company Grazing Company Occupied/Grazing Company Mining Company Grazing Company Grazing Company Grazing Company Grazing Individual Occupied/Mining Company Mining Company Grazing Company Occupied Individual Occupied Individual Occupied Individual Occupied Company Occupied/Grazing Company Occupied Company Grazing Company Grazing Company Occupied/Grazing Company Mining Company Grazing/Mining Company Occupied/Grazing Company Occupied Company Mining Company Occupied/Grazing Individual Occupied Individual Grazing Individual Occupied Authority Crown Land Company Rail/Mining/Woodland Company Mining Company Mining Company Mining Company Mining Integra Underground (Glennies Creek Colliery) age 17

18 Lot Number lan Number Owner Type Company Mining Company Mining Company Occupied/Grazing Company Grazing Company Grazing Company Occupied/Grazing Company Occupied Company Grazing Company Grazing Company Grazing Company Mining/Grazing Company Occupied/Grazing Individual Occupied/Grazing Individual Occupied/Grazing Individual Occupied/Grazing Company Occupied/Grazing Individual Occupied/Grazing Individual Grazing Individual Occupied/Grazing Individual Grazing Individual Occupied Individual Occupied Individual Occupied Company Occupied/Mining Authority Road Company Mining Company Mining Company Mining Company Mining Company Mining Company Mining Company Occupied/Grazing Company Grazing Company Grazing Company Occupied Company Grazing Company Mining Company Mining Company Mining Authority Road Authority Mining Company Grazing Individual Occupied/Grazing Company Mining Company Occupied Company Occupied/Grazing Company Occupied Individual Occupied/Grazing Individual Occupied/Grazing Individual Occupied Current Land Occupancy Status/Land Use Integra Underground (Glennies Creek Colliery) age 18

19 Lot Number lan Number Owner Type Individual Grazing Company Occupied/Grazing Company Occupied/Grazing Company Mining Authority Crown Land Individual Grazing Individual Occupied/Grazing Company Mining Individual Occupied/Grazing Individual Occupied/Grazing Authority Mining Authority Mining Authority Mining Company Mining/Grazing Company Mining Company Mining Company Occupied/Grazing Individual Occupied/Grazing Individual Occupied/Grazing Individual Occupied/Grazing Individual Occupied Individual Occupied Company Mining Company Mining Company Mining Company Mining Company Mining Individual Grazing Individual Occupied/Grazing Individual Grazing Individual Occupied/Grazing Individual Occupied/Grazing Individual Occupied/Grazing Authority Rail Authority Rail Authority Rail Current Land Occupancy Status/Land Use Lease Holdings and Cadastral information are shown in lan 1B. Integra Underground (Glennies Creek Colliery) age 19

20 Figure 1-2 Land Ownership Integra Underground (Glennies Creek Colliery) age 20

21 1.4 Stakeholder Consultation Consultation with landowners, residents, stakeholders and regulatory bodies surrounding and associated with ICO has been consistent in describing existing and proposed mining activities, including rehabilitation works within a series of Environmental Impact Studies (EIS) and Environmental Assessments (EA). The most current and applicable are the following: Glennies Creek Open Cut Coal Mine Environmental Assessment, October 2007; Integra Open Cut roject Environmental Assessment, June 2009; Integra Mine Complex Modification 1 Environmental Assessment, December 2011; Integra Mine Complex Modification 2 Environmental Assessment, September 2012; Integra Mine Complex Open Cut Operations Mining Operations lan 2013/2014; and Integra Mine Complex Modification 4 Environmental Assessment, May 2014 (pending determination). Integra s stakeholder consultation has been and will continue to be, supplemented by activities that apply specifically to C & M activities. The existing consultation includes but is not limited to the following key components: A 24-hour community hotline this service aims to promptly and effectively address community concerns; Integra Coal Operations Community Consultative Committee (CCC) currently meets quarterly to discuss environmental management and any matter raised by members on behalf of the community; Integra website includes updates on current and future operations, including past and present environmental monitoring results; Newsletters these are prepared and circulated to disseminate information on Integra s operations; and Management of a complaints register to record complaints and steps to follow up complaints. Consultation with the following key government stakeholders has been undertaken, including meetings with &E, OEH, Singleton Council and written and telephone correspondence with the Division of Energy and Resources (DRE). The details of consultation are provided in Table 1-3 Care and maintenance Mine Operations lan consultation log. Integra Underground (Glennies Creek Colliery) age 21

22 Table 1-3 Care and maintenance Mine Operations lan consultation log Stakeholder Date Issues Singleton Council 19/05/2014 IOC attended Singleton Council meeting and discussed the business decision to place mining operations into care and maintenance and the operation intends to maintain approvals and consent conditions. &E, DRE 20/05/2014 Meeting held with &E, DRE and ICO in Singleton to discuss the business decision to place mining operations into care and maintenance. Operation intends to maintain approvals and consent conditions. DRE 27/05/2014 ICO management attended Maitland DRE office to discuss the requirements and agree on actions for moving the operation towards care and maintenance. Items discussed included appropriate applications (AD8 and ML14) to regulatory stakeholders, maintaining current approval conditions, current MO adherence, requirements for submission of a MO amendment for the UG only, indicative submission dates for care and maintenance MO. EA (OEH) 27/05/2014 ICO management attended Newcastle EA office to discuss the business decision to place mining operations into care and maintenance. Operation intends to maintain approvals and consent conditions. &E 29/05/2014 ICO management attended Singleton &E office to undertake a consent review in relation to the roject Approval conditions given the business decision to place the mining operations into care and maintenance. DRE 19/06/2014 DER attended a site meeting with ICO to discuss the proposed mining activities during the C&M MOS (for both the Open Cut Operation and the Underground Operation). CCC To be held 6/08/2014 A presentation and overview of the C&M MO and opportunity for comment will be provided at the CCC meeting next scheduled for 6 th August IOC will continue to consult with the CCC as required. Integra Underground (Glennies Creek Colliery) age 22

23 2 r o p o s e d M i n i n g Ac t i v i t i e s 2.1 roject Description revious operational activities have consisted of coal extraction from the Middle Liddell seam (completion of LW12) and development work in the Hebden seam within the lease areas shown in lan 1B. All ROM coal was hauled directly from the underground to the CH ROM receival area. From the CH, product coal was loaded at the ICO Rail Load-out Facility for transportation to the ort of Newcastle for export. Current activities are associated with the mine being placed in C&M. All Longwall and development equipment has or will be removed from underground and stored on surface hardstands. A small amount of Integra staff and contractors will continue to perform duties on site with the aim of extending the life of parked up equipment, providing general maintenance and satisfying Statutory and Regulatory obligations. Rehabilitation activities will be carried out on the Ventilation Fan site to remediate disturbed areas associated with the construction of the new ventilation shaft and infrastructure. Rehabilitation will also occur on some gas drainage sites. No other rehabilitation activities are deemed as a requirement or foreseen for the period of Care & Maintenance (C&M). 2.2 Asset Register The Domains within the MO area include:- Infrastructure o Underground it-top Facilities (~43 Ha) o Ventilation Shaft & Gas Flare site (~10Ha) o Surface Gaswell sites (~9.5Ha) Water Management o rocess Water Dam and ortal Sump it-top facility o rocess Water Dams and Dirty Water Dam Vent shaft site o ossum Skin Dam and ossum Skin Clean Water Diversion Sediment Dam o Clean Water Dams within Biodiversity areas Stockpiled Material Shaft Construction site Void (old Open Cut Void) it-top ortal area Surface Gaswell sites Rehab Area asture Underground Mining Area (SM) Conservation and Biodiversity Offset Area Western Biodiversity Offset Area The Underground it-top Facilities area (~43 Ha) contains a combination of water management, old Open Cut Void and infrastructure features. Estimates of the footprint area for items within the infrastructure domain appear in the Rehabilitation Cost Estimate (RCE) tables attached in Appendix It should be noted that a detailed RCE (including use, footprint and height as necessary) will be developed within 12 months of entering the Care & Maintenance period as part of a commitment to providing a Detailed Mine Closure lan. Integra Underground (Glennies Creek Colliery) age 23

24 Current estimates are based on a snapshot of current disturbance. Features within the Underground it-top Facilities area are listed in Table 2-1 Rehabilitation Features - Underground it-top Facilities area below and are illustrated in Figure 2-1. Table 2-1 Rehabilitation Features - Underground it-top Facilities area REHABILITATION FEATURE 1 Mine Entry and Existing Roads 2 Main Office Buildings 3 Employee Car ark 4 Sewage Effluent onds 5 Training Room 6 Office and Bathhouse Complex and Muster Area 7 Bathhouses 8 otable Water Tank 9 Longwall Emulsion Storages 10 rocess Water Filtration lant 11 Electrical ower Yards, Substation and Switchroom 12 Underground Fire Water Tanks 13 Transformers 14 Longwall Laydown Area 15 Access Ramp and Associated Road Network kv owerline 17 Stores Area 18 Hardstand / Storage Areas 19 rocess Water Dam 20 Sedimentation Dam 21 Clean Water Dam 22 Magazines 23 Sewage Treatment lant 24 ortal Sump 25 ortals (3 off) within the North it Highwall 26 Diesel Storage Tank 27 Workshop 28 Hydrocarbon Storage and Dispensing; Washdown and Maintenance Area 29 Transformers 30 Stacker Belt Conveyor CV Conveyor Starter / Control House 32 Fire Station 33 Compressor Building 34 RL 48 Coal Stockpile Area 35 RL 75 Coal Stockpiling and Stone Storage Area 36 Conveyor SC Transfer / Breaker Station (re-treatment) Area / Stone Stockpile Area 38 Conveyor SC RL 100 Stockpile Area. 40 RL 100 Area Access Ramps 41 ortal Sump umps Integra Underground (Glennies Creek Colliery) age 24

25 REHABILITATION FEATURE 42 ipeline 1 43 ipeline 2 44 ipeline 3 45 ipeline 4 46 ipeline 5 47 RL 100 Haul Road 48 Ventilation Shaft owerline Integra Underground (Glennies Creek Colliery) age 25

26 FEATURE EXISTING CAR ARKING No 1 DH L 1 Mine Entry and Existing Roads 2 Main Office Buildings 3 Employee Car ark 4 Sewage Effluent onds 5 Training Room 6 Office and Bathhouse Complex and Muster Area 7 Bathhouses 8 otable Water Tank 9 Longwall Emulsion Storages 10 rocess Water Filtration lant 11 Electrical ower Yards, Substation and Switchroom 12 Underground Fire Water Tanks 13 Transformers 14 Longwall Laydown Area 15 Access Ramp and Associated Road Network kv owerline 17 Stores Area 18 Hardstand / Storage Areas 19 rocess Water Dam 20 Sedimentation Dam 21 Clean Water Dam 22 Magazines 23 Sewage Treatment lant 24 ortal Sump 25 ortals (3 off) within the North it Highwall 26 Diesel Storage Tank 27 Workshop 28 Hydrocarbon Storage and Dispensing; Washdown and Maintenance Area 29 Transformers 30 Stacker Belt Conveyor CV Conveyor Starter / Control House 32 Fire Station 33 Compressor Building 34 RL 48 Coal Stockpile Area 35 RL 75 Coal Stockpiling and Stone Storage Area 36 Conveyor SC Transfer / Breaker Station (re-treatment) Area / Stone Stockpile Area 38 Conveyor SC RL 100 Stockpile Area. 40 RL 100 Area Access Ramps 41 ortal Sump umps 42 ipeline 1 43 ipeline 2 44 ipeline 3 45 ipeline 4 46 ipeline 5 47 RL 100 Haul Road 48 Ventilation Shaft owerline Figure 2-1 Rehabilitation Features - Underground it-top Facilities area Integra Underground (Glennies Creek Colliery) age 26

27 2.3 Activities over the MO Term During the term of this C&M MO, no mining activities or coal processing will be conducted. Activities during this MO are associated with the mine being placed in C&M. All Longwall and development equipment will be removed from underground and stored on the surface. A small amount of Integra staff and contractors will continue to perform duties on site with the aim of extending the life of parked up equipment, providing general maintenance and satisfying Statutory and Regulatory obligations EXLORATION There are no plans for any exploration activities to be carried out during the term of this MO CONSTRUCTION There are no plans for any construction activities to be carried out during the term of this MO. There is potential for the removal of prefabricated offices and possible demolition of two old pre-mining buildings (old weather board school and brick school house) MINING OERATIONS (INCLUDING MINING UROSES) There are no plans for any mining operational activities to be carried out during the term of this MO. Redundant equipment such as: conveyors, diesel equipment, gas drainage infrastructure and tasks associated with underground maintenance will occur with the objective of prolonging equipment and infrastructure life. While the underground operation has no history of spontaneous combustion underground or within the surface facilities, all ROM stockpiles will be removed from the underground area and stockpile bases ripped to further reduce the potential for spontaneous combustion events and dust generation. Water management will be conducted in accordance with the Integra Mine Complex Water Management lan, which is currently under review by the D&E. Amendments to the Water Management lan include proposed surface and ground water management measures and monitoring programs to be implemented during care and maintenance. While there will be a net reduction in water consumption across the site during care and maintenance, dust suppression and evaporative systems will continue to be utilised during the term where necessary. Contingency plans have been included in the Water Management lan for emergency water storage. As regular inspections will continue to be carried out in the underground workings, pumping capabilities will be maintained onsite to dewater the ortal Sump (the main dewatering point for the underground mine) and to transfer water between ossum Skin Dam and the Open Cut (namely D1). A dedicated umping Coordinator will be retained on-site to manage the water across the integrated underground and open cut operations. Integra Underground (Glennies Creek Colliery) age 27

28 2.3.4 ROCK/OVERBURDEN EMLACEMENT There are no rock/overburden emplacement activities to be carried out during the term of this MO. Inert drill cuttings from the new Ventilation Shaft will be used to infill some temporary water holding structures during Vent Shaft construction site rehabilitation ROCESSING RESIDUES AND TAILINGS There are no processing activities which will produce residues and tailings product during the term of this MO. Handling of drill water/mud and cuttings in temporary dams and stockpiled cuttings from the new fan site during rehab activities WASTE MANAGEMENT Waste management activities and services will continue during the term of this MO. These activities will occur at a reduced rate in comparison to normal operational activities. Tasks associated to waste management will include specific waste receptacles for waste segregation and management of general waste, batteries, cardboard & paper, comingled recycling, scrap steel, waste oil, oily rag & oil filter and oily water. Waste management will be monitored by site personnel DECOMMISSIONING AND DEMOLITION ACTIVITIES There are no demolition activities planned to be carried out during the term of this MO. There is the potential for the removal of prefabricated offices and possible demolition of two old premining buildings (old weather board school and brick school house) TEMORARY STABILISATION Nil planned, however stabilisation works would be undertaken if necessary for health and safety reasons ROGRESSIVE REHABILITATION AND COMLETION Gaswell Sites During the term of the MO it is expected that 6 gaswell sites will be rehabilitated per year. Each gaswell site is approximately 10m x 3m and will be rehabilitated in accordance with the Gaswell Rehabilitation rocedure which outlines gaswell capping and rehabilitation methods. If further gaswells become available for rehabilitation, i.e. they become redundant for gas drainage, they will be completed in addition to the scheduled 6 sites where possible. Thirteen gaswells have already been relinquished, while a further 10 have been recently rehabilitated following their decommissioning. Twenty-two gaswells are currently available for rehabilitation and will be completed in line with the rehabilitation schedule. A breakdown of current gaswell uses is given in Table 2.2 below and is depicted in lan 2, Section Integra Underground (Glennies Creek Colliery) age 28

29 Table 2-2 Breakdown of Integra Underground Gaswell Sites Gaswell Type Number Relinquished 13 Recently Rehabilitated 10 EDL/Gas Flare 19 lanned for Rehabilitation 22 Not Connected (for Gas Drainage) 7 Vent Fan Site The Vent Fan site will be progressively rehabilitated during the care and maintenance MO term, with approximately 8hectares to be available for rehabilitation works over the term. Rehabilitation activities to take place at the site are expected to comprise: Dewatering, backfill and rehabilitation of temporary drill water (10ML) dam; Removal and rehabilitation of temporary infrastructure/buildings no longer required; Rehabilitation including topsoiling and seeding of tracks with the site; Drill water circulation pond to be dewatered and desilted and then backfilled and rehabilitated or incorporated into the dirty water system; Drill cuttings stockpile removed or distributed on site via back filling water storage and potentially creating screening bunds; Use of Organic Growth Medium (OGM) to disturbed area followed by grass seeding; Tree planting in appropriate areas; and Surface drainage design to minimise the dirty water footprint and maximise the cleanwater footprint and diversion of clean water from site. A plan of the proposed rehabilitation areas is presented in Figure 7.1 in Section 7.3 of this document MATERIAL RODUCTION SCHEDULE DURING MO TERM There are no production activities which will produce topsoil, overburden, ROM, reject material or product during the term of this MO. (Years are September to August) Table 2-3 Material roduction Schedule during the MO Term Material Unit 2014/ / /17 Stripped m Topsoil Overburden m ROM Coal Mt Reject Mt Material roduct Mt Integra Underground (Glennies Creek Colliery) age 29

30 3 E n v i r o n m e n t a l I s s u e s M a n a g e m e n t 3.1 Environmental Risk Assessment A Risk Assessment (RA) was completed to identify potential hazards associated to activities during the period of C & M and the severity of risk from these activities and consequently, the extent of control strategy required to prevent and/or mitigate those risks. In determining the level of risk and the potential impact of each activity, process or facility, consideration was given to a range of existing controls. If existing controls were not adequate, a range of proposed controls were assessed and documented for further action. The RA was based on the following criteria: Objective To identify key Environmental risks associated with Integra Underground activities and implementation of appropriate controls during the period of Care and Maintenance. Scope This risk assessment will evaluate and assess the level of risk and the related hazards involved with the environmental tasks associated with Integra Underground being placed in Care & Maintenance. No tasks are to be assessed in association with Operational activities. Stakeholders Stakeholders include and are not limited to NSW Regulatory Departments such as Trade & Investment, lanning & Environment, Environment & Heritage, Office of Water, Local Government, Community and all personnel working on site during the period of Care and Maintenance. This document will follow departmental obligations of distribution after final approval. Integra Underground (Glennies Creek Colliery) age 30

31 Table 3-1 Risk Assessment Environmental MO Care & Maintenance Activities Job Step Hazard Existing controls Consequence Likelihood Risk Rating roposed Controls Environmental factors arising in Care & Maintenance, including but not limited to the following hazards Failure to maintain compliant Air quality across surface facilities eriodic etrotac application to surface roadways Air quality Monitoring stations Minimise surface disturbance Rehab non-operational disturbed areas Air quality Greenhouse Gas Management lan EM_ D L21 Review frequency of etrotac application and capture in work order system. Liaise with Department regarding criteria and frequency of air quality monitoring required under C & M. Failure to maintain compliant Noise limits across surface facilities Regulatory Noise monitoring (eriodically) Noise Management lan EM_ D L21 Liaise with Department regarding criteria and frequency of noise monitoring under C & M. Integra Underground (Glennies Creek Colliery) age 31

32 Job Step Hazard Existing controls Consequence Likelihood Risk Rating roposed Controls Failure to monitor and control Erosion & Sediment run off Current weekly Inspections by Env Advisor Inspections during and after high rainfall events Regular maintenance of surface drainage system Erosion & Sediment Control lan (Draft) Water Management lan EM_0001 RO_2179 hotographic Assessment of Indicative Erosion Rates. 2 D L21 Develop work order system for erosion sediment monitoring and inspections (to include locations) Finalise Erosion & Sediment Control lan (Draft) Review inspection frequency of surface drainage system. Ensure ongoing inspections are captured in work order system. Failure to monitor and control Surface water pollution and discharge Current weekly Inspections by Env Advisor Inspections during and after high rainfall events Regular maintenance of surface drainage system Erosion & Sediment Control lan (Draft) Water Management lan EM_0001 TAR_0058 Failure of ossum Skin Dam SD regulatory inspection regime by Env Advisor Dirty water pipe work inspections by Env Advisor 2 C M18 Finalise Erosion & Sediment Control lan (Draft) Review inspection frequency of surface drainage system and pipework. Ensure ongoing inspections are captured in work order system. Integra Underground (Glennies Creek Colliery) age 32

33 Job Step Hazard Existing controls Consequence Likelihood Risk Rating roposed Controls Failure to monitor and control Ground water pollution Bore water analysis Water Management lan EM_ D L21 Revise Water Management lan to reflect C&M activities and submit to DE Failure to manage and control hazardous materials spills and contaminated land Correct storage and handling of Hazardous materials Surface inspections of hardstands and operational areas for hazardous spills Monitoring of bunded areas and pump out of captured rainwater osition, stock and use of spill kits and drysorb Removal of contaminated material to OC Bioremediation area ollution Incident Response Management lan EM_2014 RO_2178 Bioremediation of Hydrocarbon Contaminated Soils RO_2132 Hazardous Substances & Dangerous Goods 2 D L21 Ensure ongoing inspections are captured in work order system. Review inspection frequency and standards of hardstands and operational areas. Integra Underground (Glennies Creek Colliery) age 33

34 Job Step Hazard Existing controls Consequence Likelihood Risk Rating roposed Controls Failure to carry out appropriate Waste Management Current weekly Inspections by Env Advisor and contracted Facilities Waste Supervisor Supply and servicing on site of segregation waste receptacles by licensed contractor Waste management signage Waste Management lan EM_2010 RO_ 0381 Storage of General Waste 2 D L21 Ensure ongoing inspections are captured in work order system. Review inspection frequency and standards of weekly inspections Change waste contractor requirement to on need basis for both servicing and inspections. Failure to monitor and maintain Sewage Treatment plant Current quarterly inspection and maintenance regime by licensed contractor Visual inspections of plant and irrigation area made during weekly environmental inspections EM_2014 ollution Incident Response Management lan 2 C M18 Ensure ongoing inspections are captured in work order system. Integra Underground (Glennies Creek Colliery) age 34

35 Job Step Hazard Existing controls Consequence Likelihood Risk Rating roposed Controls Failure to manage Threatened Flora protection Failure to manage Threatened Fauna protection Failure to manage Biodiversity Offset Areas Regulatory independent surveys Biodiversity Management lan EM_2016 Threatened Species Management lan Weed and est Management lan EM_2017 Regulatory independent surveys Biodiversity Management lan EM_2016 Threatened Species Management lan Weed and est Management lan EM_2017 Regulatory independent surveys Biodiversity Management lan EM_2016 Threatened Species Management lan Weed and est Management lan EM_ D L21 Review Biodiversity Management lan. If warranted, revise to reflect C&M activities and submit to DE 2 D L21 2 D L21 Review Biodiversity Management lan. If warranted, revise to reflect C&M activities and submit to DE Integra Underground (Glennies Creek Colliery) age 35

36 Job Step Hazard Existing controls Consequence Likelihood Risk Rating roposed Controls Failure to manage Weed & est control Failure to manage Visual amenity and lighting General grounds maintenance and weed spraying around surface facilities Scheduled pest control applications around surface buildings Weed and est Management lan EM_2017 RO_0383 Land Management AUD_0033 Surface & Hardstands RO_2127 Outdoor Lighting FRM_2435 Installation of outdoor lighting 2 D L21 Ensure ongoing inspections are captured in work order system. Review inspection frequency and scope of general grounds maintenance and weed spraying around surface facilities. 2 D L21 Integra Underground (Glennies Creek Colliery) age 36

37 Job Step Hazard Existing controls Consequence Likelihood Risk Rating roposed Controls Failure to manage Aboriginal & European Heritage Failure to manage Surface Spontaneous Combustion Failure to manage Bushfire EM_2000 Aboriginal Heritage Management lan EM_0004 Aboriginal Heritage Management lan EM_2013 Stage 1 Non Aboriginal Heritage Management lan EM_2015 Stage 2 Non Aboriginal Heritage Management lan RO_0383 Land Management Removal of all loose coal around conveyor structures Removal of all remnant coal from RL100 stock pile HM_ Spontaneous Combustion Management lan Maintain low levels of potential fuel by maintaining grounds around facilities (grounds maintenance mowing/brush cutting and weed spraying work orders) RO_2126 Bush Fire Hazard Reduction lan 2 D L21 2 D L21 2 D L21 Review inspection frequency and scope of general grounds maintenance and weed spraying around surface facilities. Integra Underground (Glennies Creek Colliery) age 37

38 Job Step Hazard Existing controls Consequence Likelihood Risk Rating roposed Controls Failure to monitor and manage Mine Subsidence Subsidence Management lan LW Subsidence Management lans and Monitoring lans 2 D L21 Liaise with Department regarding criteria and frequency of subsidence monitoring. Ensure ongoing inspections are captured in work order system. Failure to manage Greenhouse Gas emissions Failure to rehabilitate disturbed areas HM_0101 Mine Atmosphere Hazard Management lan RO_0560 Ventilation Quantity and Temperature Measurement rocedure RO_0200 Mine atmosphere monitoring procedure Air quality Greenhouse Gas Management lan EM_2012 Surface gas reticulation and delivery to EDL power station Vale Australia Decentralised NGER reporting governance procedure Obligations per MO in regards to Rehabilitation targets and commitments 3 C H13 Review inspection criteria and frequency regarding monitoring for NGER emissions. Ensure ongoing monitoring is captured in work order system. Implement Integra NGER reporting procedure 3 D M17 Review MO requirements and plan Rehab tasks Integra Underground (Glennies Creek Colliery) age 38

39 Job Step Hazard Existing controls Consequence Likelihood Risk Rating roposed Controls Acid Mine drainage Integra mine complex have no history of acid mine drainage issues 2 D L21 ublic Safety Site fence, boom gate and swipe on system, general fencing, warning signs, Acts & Regs Controls as per care and maintenance BBRA RSK_ D L21 Integra Underground (Glennies Creek Colliery) age 39

40 3.2 Environmental Risk Management Environmental aspects connected to Integra Underground are identified and managed within the Environmental Management System (EMS). The EMS is structured with an Environmental olicy which overrides numerous Environmental Management lans specific to environmental aspects such as, but not limited to Air Quality, Water, Noise, Subsidence, Heritage, Waste, Landscape, Rehabilitation, Biodiversity, Erosion & Sediment Control, Flora & Fauna, Weed & est and ollution Control (list of Management lans in Appendix 3) SECIFIC RISKS RELATING TO REHABILITATION It should be noted that rehabilitation activities occurring during the period of this MO will be limited to disturbance associated with gas drainage infrastructure and recently bored ventilation shaft site. No other rehabilitation will be required during the period of C&M. Geology and geochemistry The Underground roject Area is predominantly covered by shallow hillslope-based colluvium, with alluvial based sedimentary deposits in the valley floors. These are in turn sequentially underlain by coal measures of the Vane Subgroup, Archerfield Sandstone and Jerrys lains Subgroup of the Wittingham Coal Measures. The sequence contains interlayered sandstone, conglomerate, mudstone, siltstone and coal (Beckett 1988). Dirty water catchments are typically represented by salinity values of approximately µs/cm. Higher levels of salinity are a direct result of the surrounding exposed geology of the old open cut void. Underground water pumped to the portal sump is of a similar range due to the saline nature of the local geology. ph is generally within the range of 7 to 8.5 for the same catchment areas. Cleanwater catchment for the surface facilities drains into Glennies Creek and is monitored at site GC2 Glennies Creek at Nobles Crossing. Monitoring conducted at GC2 since January 2005 indicates a relatively stable stream environment, with fluctuations in EC subject to rainfall. EC levels generally range between 200uS/cm to 450uS/cm, with elevated readings above 500uS/cm occurring in association with rainfall events. ph results have consistently been between 7.5 and 8. Results suggest that mining activities have had negligible impact on the Glennies Creek catchment. Material prone to spontaneous combustion There will not be any remnant coal spillage associated with conveyors or transfer stations and no stockpiled coal on RL100 which could provide potential for spontaneous combustion. Integra Underground has no history of spontaneous combustion underground or within surface facilities. (Ref HM_0103). Material prone to generating acid mine drainage Integra Underground (Glennies Creek Colliery) age 40

41 Surface disturbance footprint associated with Integra Underground is minimal and disturbed areas within the dirty water footprint are not prone to sulphide materials. There have been no recorded incidents of outflows of acidic water from this site. Mine Subsidence Ongoing regulatory monitoring requirements will be discussed with the Department of Trade & Investments rincipal Subsidence Engineer to establish minimum monitoring and reporting requirements during the phase of non-operational activities during the period of Care and Maintenance. Subsidence due to Integra Longwall mining has been estimated using a range of subsidence methods and the most conservative of these has been adopted wherever there is a range. However, actual maximum subsidence parameters (vertical subsidence, tilt, and strain) are likely to be 50 to 80% of the maximum values (SCT, 2006). The method for predicting subsidence over Longwalls 10 to 17 was based on consideration of the sag subsidence over individual panels and the elastic compression of the chain pillars and surrounding strata. These two components were independently calculated based on panel geometry, pillar size and overburden depth taking into account the pillar loadings and the spans across individual panels. Total subsidence was then estimated by adding the two components together. This approach, though generally found to be conservative compared to measured subsidence, provides a broad-based estimate of subsidence that might be expected in situations that are outside of the normal range of subsidence experience (SCT, 2006). Experience at numerous sites in NSW indicates that maximum subsidence in single seam mining does not exceed 65% of the seam thickness extracted if there were no chain pillars at all. Since the chain pillars are likely to support some proportion of the overburden load, the actual maximum subsidence is expected to be somewhat less than this maximum value (SCT, 2006). The maximum vertical subsidence predicted over Longwalls 10 to 16 is 1.6m, and 0.8m over Longwall 17. The 1.6m maximum subsidence value is determined from 65% of the assumed 2.4m seam section mined, recognising that previous subsidence experience in NSW indicates that maximum subsidence would be less than 65% of seam thickness if there were no chain pillars at all. Since the chain pillars are likely to support some proportion of the overburden load, the actual maximum subsidence is expected to be somewhat less than this maximum value (SCT, 2006). otential subsidence risks associated with Integra Longwall mining have been identified generally as minimal. Features that have been monitored include: Bettys Creek, Drainage paths and channels, Aquifers and groundwater, land prone to inundation, water related ecosystems, threatened and protected species, natural vegetation, fauna and fauna habitat, public utilities, farm land infrastructure, neighbouring mine infrastructure and areas of archaeological significance. Subsidence effects are described in Volume 1 Written Report Glennies Creek Longwall anels 10 to 17 Application for Subsidence Management Approval. Erosion and sediment control Integra Underground has a policy to prevent soil erosion and sediment transport at the source as per an Erosion & Sediment Control lan. The current mine site footprint provides minimal opportunity for erosion in both clean and dirty water areas. If erosion cannot be significantly reduced in situ, sedimentation control structures are used to capture and reduce loads in periods of high rainfall. Activities that have the highest risk of affecting erosion and sediment transport on site and within gas drainage infrastructure are topsoil stripping, ground preparation and rehabilitation. Typical practices utilised to control erosion and sediment impacts are: surface water management, delineating clean and dirty water foot prints, Integra Underground (Glennies Creek Colliery) age 41

42 minimising surface disturbance and vegetation removal, timely rehabilitation, engineered control structures and monitoring. Soil stock piles are limited to those around ossum Skin Dam (SD) where surface soil was stripped during dam construction and conserved for future rehabilitation. These stockpiles are fully vegetated and show no signs of erosion. Soil in undisturbed areas in the vicinity of the surface facilities comprise duplex soils with clay to sandy loam A horizon over a clay loam to light clay to a clay B horizon and alluvial soils in drainage lines. Soils in the vicinity of the shaft site are comprised of Solodic soils on slopes and alluvial soils in drainage lines. The potential for erosion in these areas is limited to areas of disturbance or minimal vegetation that may expose dispersive loams and clays. Soils and landcover surrounding both the surface facilities and fan site are not representative of areas that have been undermanaged and eroded. Soil type(s) and suitability There is no topsoil management associated with underground surface operations other than on occasions of disturbance caused by infrastructure changes and the small amount of stockpile material previously noted at SD. Additions or removal of infrastructure is managed by Integra ground disturbance documentation and related plans. There are no plans for new surface disturbance during the term of this MO and no requirement to manage risks related to topsoil storage. Flora Threatened flora species, non-threatened flora, biodiversity, weed and pests are managed by specific management plans, such as: Threatened Species Management lan, Flora and Fauna Management lan, Biodiversity Management lan and Weed and est Management lan (Appendix 13.3). Fauna Threatened fauna species, non-threatened fauna, biodiversity, weed and pests are managed by specific management plans, such as: Threatened Species Management lan, Flora and Fauna Management lan, Biodiversity Management lan and Weed and est Management lan (Appendix 13.3). Other Risks Overburden characterisation There is no overburden material related to Integra Underground surface activities during the term of this MO. Slopes and slope management eriodic inspections by geotechnical personnel may be carried out on highwall areas above the portal entrance. There are no rehabilitated slopes within the Underground mine surface footprint. Air Quality Air quality issues will be limited during the period of C & M due to a minimum of surface activities. If required, surface roads and hardstands around the surface facilities will be Integra Underground (Glennies Creek Colliery) age 42

43 periodically sprayed with petrotac to control vehicle generated dust. Activities associated with vent fan site rehabilitation and gas drainage site rehabilitation will be monitored and advised on by the C & M Environmental Advisor. Air quality management is also captured within the RA and addressed by the approved EM Air Quality & Greenhouse Gas Management lan (Appendix 13.3). Surface and Ground Water Surface and ground water management at Integra is conducted in accordance with the approved Water Management lan (WM) (Appendix 13.3) and was prepared in consultation with OEH, the NSW Office of Water (NOW) and D&E. The WM includes a site water balance, an erosion and sediment control plan, surface water management, groundwater management and surface and groundwater response plans. Water control structures such as diversions, drains, sumps and pipework will be monitored and maintained during the C&M period in order to reduce and where possible limit, any adverse effects on surface and groundwater. Inspections of major water bodies, pipelines and clean/dirty water diversion drains will regularly take place to ensure mine affected water is adequately contained on-site. Sufficient pumping capability (i.e. pumps, polypipe) will be maintained at the Underground to manage dewatering requirements on-site with emergency water storage available within the Open Cut mining voids if required. All water management activities will be conducted in accordance with the WM and other applicable policies and procedures. The Environmental Department in conjunction with the umping Coordinator will be responsible for these activities during this MO term. Contaminated Land otential sources of contaminated land such as hazardous material spills will be limited due to a minimum of surface activities during C & M. Chemical storage and handling will also be limited and fluids such as diesel are contained within a bund. Spill kits are located at areas identified for potential spills such as workshops and diesel bund. Spill kits will be monitored and stock as required. otential hydrocarbon spills can be cleaned up and the contaminate material sent to the open cut bio remediation area. Contamination management is also captured within the RA. Hazardous Materials Hazardous material spills will be limited due to a minimum of surface activities during C & M. Chemical storage and handling will also be limited and fluids such as diesel are contained within a bund. Spill kits are located at areas identified for potential spills such as workshops and diesel bund. Spill kits will be monitored and stock as required. otential hydrocarbon spills can be cleaned up and the contaminate material sent to the open cut bio remediation area. Contamination management is also captured within the RA. Greenhouse gases, methane drainage / venting The majority of methane gas produced from goaf areas will be supplied to the Glennies Creek Methane ower Station. Methane gas management will be an ongoing process during C & M and is also captured within the RA. Greenhouse gases are also addressed by the approved EM - Air Quality & Greenhouse Gas Management lan (Appendix 13.3). Acid Mine Drainage Surface disturbance footprint associated with Integra Underground is minimal and disturbed areas within the dirty water footprint are not prone to sulphide materials. There have been no recorded incidents of outflows of acidic water from this site. Blasting There will be no blasting activities associated with the site during C & M. Integra Underground (Glennies Creek Colliery) age 43

44 Noise Activities associated to noise will be limited during the period of C & M. All activities on site will occur during daytime hours. Noise management is also captured within the RA and approved the approved EM Noise Management lan (Appendix 13.3). Visual and Lighting All activities on site will occur during daytime. Visual amenity management is also captured within the RA. Heritage (Aboriginal and European) There is no land disturbance planned for the period of C & M. Land disturbance activities must follow the Dig ermit process, which captures the potential of heritage via due diligence surveys. Heritage management is also captured within the RA and the approved Aboriginal Heritage Management lan and the Non-Aboriginal Heritage Management lan (Appendix 13.3). Spontaneous Combustion specifically in relation to overburden management and subsurface seams beneath rehabilitation areas. This risk is not applicable to Integra Underground surface facilities. Bushfire Regular grounds maintenance provides cleared areas around surface facilities via lawn mowing, brush cutting and weed spraying. Bushfire management is also captured within the RA. The mine has fire control services on site and a two branches of the Rural Fire Service are located nearby. Mine Subsidence lease refer to section above on Mine Subsidence. Mine Subsidence is also captured within the RA and the approved Subsidence Management lan (Appendix 13.3). Integra Underground (Glennies Creek Colliery) age 44

45 4 o s t M i n i n g L a n d U s e 4.1 Regulatory Requirements The regulatory requirements specific to post mining land-use and rehabilitation outcomes at ICO are summarised in Table 4-1 below. Integra Underground (Glennies Creek Colliery) age 45

46 Table 4-1 Regulatory Requirements for Integra Underground Source Document Subject Rehabilitation/ost Mining Objective roject Approval, Schedule 3, Condition 56 roject Approval, Schedule 3, Condition 56 roject Approval, Schedule 3, Condition 56 roject Approval, Schedule 3, Condition 56 roject Approval, Schedule 3, Condition 56 roject Approval, Schedule 3, Condition 56 roject Approval, Schedule 3, Condition 56 roject Approval, Schedule 3, Condition 56 roject Approval, Schedule 3, Condition 57 Entire Underground roject Area Related Area/Domain Infrastructure (incl water management infrastructure) O/B and Waste Rock Emplacement Active Mine Areas & Voids Rehabilitation Safe, stable & non-polluting. Yes Yes Yes Yes Surface Infrastructure Land Xstrata Mt Owen Bettys Creek Diversion Bettys Creek and Main Creek sections to be undermined Underground roject Creek Diversions Built Features Community Rehabilitation To be decommissioned and removed, unless the Director-General agrees otherwise. Restore ecosystem function, including maintaining or establishing self-sustaining eco-systems comprised of: - local native plant species (unless the Director-General agrees otherwise); and - a landform consistent with the surrounding environment. Rehabilitate to the same or better geotechnical geomorphic and ecological condition as prior to mining, unless the owner agrees otherwise. Hydraulically and geomorphologically stable, with diverse habitats and ecology. Hydraulically and geomorphologically stable, with diverse habitats and ecology. Repair to pre-mining condition or equivalent unless the owner agrees otherwise. Minimise the adverse socio-economic effects associated with mine closure. The roponent shall carry out rehabilitation of the site progressively, that is, as soon as reasonably practicable following the disturbance. Yes Yes Yes Yes Yes Yes Other Land Affected by the roject Yes Yes Yes Yes Other Community Yes Integra Underground (Glennies Creek Colliery) age 46

47 Source Document Subject Rehabilitation/ost Mining Objective roject Approcal, Statement of Commitments Mining Lease 1437 Deed, Condition 7 Mining Lease 1437 Deed, Condition 14(d) Mining Lease 1515 Deed, Condition 23 Rehabilitation Rehabilitation Roads and Tracks Rehabilitation Rehabilitation associated with proposed mining will be undertaken in accordance with the relevant MO, REM, Extraction lans and SMs. Any disturbance as a result of activities under this lease must be rehabilitated to the satisfaction of the Director-General. Temporary access tracks must be rehabilitated and revegetated to the satisfaction of the Director-General as soon as reasonably practicable after they are no longer required under this Lease. If so directed by the Minister, the lease holder shall rehabilitate to the satisfaction of the Minister any lands within the subject area which may have been disturbed by the lease holder. Entire Underground roject Area Related Area/Domain Infrastructure (incl water management infrastructure) Yes Yes O/B and Waste Rock Emplacement Active Mine Areas & Voids Yes Yes Yes Other Land Affected by the roject Yes Yes Other Community Integra Underground (Glennies Creek Colliery) age 47

48 4.2 ost Mining Land Use Goal Integra Underground is committed to achieving a post mining land use outcome which is safe, stable and sustainable and meets the requirements of key stakeholders. In general and where practicable the final landscape will be returned to as close as possible to the pre-mining landuse configuration. A conceptual final landform design and rehabilitation plan which details land use is shown on lan 4. ost mining land capability classification (per OEH Guidelines) will be a mixture of Classes II, III, IV, V and VI. Definitions of the land capability classes are provided in Table 4-2. Class Land use Definition Table 4-2 Land Capability Class Definitions 1 II III IV V Agriculture Mainly Agriculture Mainly Grazing Mainly Grazing Suited to a wide range of land uses and land management practices. Fertile soils and short, gradual slopes are capable of supporting a variety of agricultural uses involving cultivation. Land can be subject to rill and gully erosion and soil structure decline but can be effectively managed by applying appropriate management practices. Capable of sustaining cultivation on a rotational basis, however productivity will vary with soil fertility. Astute land management practices required to manage limitations, i.e. erosion and sediment control, salinity and water quality management. Occasional cultivation, better grazing land. Soil conservation practices such as pasture improvement, stock control, application of fertiliser and minimal cultivation for the establishment or re-establishment of permanent pasture, maintenance of good ground cover. Similar to class IV, structural soil conservation works such as diversion banks and contour ripping, together with the practices in Class IV, like the maintenance of good ground cover. VI Grazing Not capable of cultivation, less productive grazing, can have saline areas. Soil conservation practices including limitation of stock, broadcasting of seed and fertiliser, promotion of native pasture regeneration, prevention of fire and destruction of vermin. This may require some structural works and maintenance of good ground cover. 1 Based on definitions described by the New South Wales Office of Environment and Heritage. Integra Underground (Glennies Creek Colliery) age 48

49 4.3 Rehabilitation Objectives The rehabilitation objectives for the site, as a whole, seek to achieve an agreed post mining land use that is safe, stable, non-polluting and sustainable. Individual Domains may have more site-specific objectives as contained in the following extract from the roject Approval (08_0101 and 08_0102) Modification 2, dated 1 February Rehabilitation Objectives 56. The roponent shall rehabilitate the site to the satisfaction of the Director-General of DRE. This rehabilitation must be generally consistent with both the rehabilitation strategy described in the open cut and underground project EAs and depicted conceptually in the figure in Appendix 9 and the objectives in Table 19. Table 19: Rehabilitation Objectives Area/Domain Rehabilitation Objectives Site (as a whole) Surface infrastructure Safe, stable & non-polluting To be decommissioned and removed, unless the Director-General agrees otherwise Other land affected by the projects Restore ecosystem function, including maintaining or establishing self-sustaining ecosystems comprised of: local native plant species (unless the Director- General agrees otherwise); and a landform consistent with the surrounding environment Xstrata Mt Owen Bettys Creek Diversions Sections of Bettys Creek and Main Creek to be undermined Underground roject Creek Diversions Built features Community Rehabilitate to the same or better geotechnical, geomorphic and ecological condition as prior to mining, unless the owner agrees otherwise Hydraulically and geomorphologically stable, with diverse habitats and ecology Hydraulically and geomorphologically stable, with diverse habitats and ecology Repair to pre-mining condition or equivalent unless: the owner agrees otherwise; or the damage is fully restored, repaired or compensated for under the Mine Subsidence Compensation Act 1961 Minimise the adverse socio-economic effects associated with mine closure Integra Underground (Glennies Creek Colliery) age 49

50 5 R e h a b i l i t a t i o n l a n n i n g a n d M a n a g e m e n t 5.1 Domain Selection RIMARY DOMAINS The rimary Domains are defined on the basis of land management units within the mine site. These Operational domain types generally have unique operational and functional purposes and so are likely to have similar geophysical characteristics. Table 5-1 Coding for primary (operational) and secondary (post mining land use) domains lists the Domain types and Codes. Table 5-1 Coding for primary (operational) and secondary (post mining land use) domains Code rimary Domain Code Secondary Domain 1 Infrastructure A Infrastructure 2 Tailings Storage Facility B Water Management Area 3 Water Management C Rehabilitation Area Grassland 4 Overburden Emplacement D Rehabilitation Area - asture 5 Stockpiled Material E Rehabilitation Area - Woodland 6 Void (Open cut void) F Rehabilitation Area Forest 7 Rehabilitation Area asture G Rehabilitation Area Rural Land Capability Classification i to viii 8 Underground Mining Area (SM) H Relinquished Lands 9 Conservation and Biodiversity Offset Area I Final Void J Conservation and Biodiversity Offset Area Integra Underground (Glennies Creek Colliery) age 50

51 Table 5-2 rimary Domains rimary Domain Code Underground it-top Facilities - Infrastructure 1 Ventilation Shaft & Gas Flare site - Infrastructure 1 Surface Gaswell sites - Infrastructure 1 rocess Water Dams it-top facility 3 rocess Water Dams Vent shaft site 3 Stockpiled Material Shaft Construction site 5 Void (Open cut void it-top ortal area) 6 Surface Gaswell sites Rehab. Area asture 7 Underground Mining Area (SM) 8 Conservation and Biodiversity Offset Area 9 Table 5-3 Secondary Domains Secondary Domain Code (rimary - Secondary Underground it-top Infrastructure - Rehab Rural Land G (IV or V) Ventilation Shaft & Gas Flare site Infrastructure - Rehab Rural Land G (IV or V) Surface Gaswell sites Infrastructure - Rehab Rural Land G IV rocess Water Dams it-top facility Water Management B rocess Water Dams Vent shaft site Water Management B Stockpiled Material Shaft Construction site - Rehab Rural Land G V Void (Open cut void it-top ortal area) - Rehab Rural Land G (IV or V) Void (Open cut void it-top ortal area) Water Management B Surface Gaswell sites Rehab. Area asture Relinquished Lands H Underground Mining Area (SM) Relinquished Lands H Conservation and Biodiversity Offset Area - Biodiversity Offset Area J INFRASTRUCTURE Integra Underground has infrastructure located at the it-top Facilities area, Shaft & Fan site, Gas Flare site and gaswell sites located above and adjacent to the active mining area as seen in lan 1C. Note that the Underground Surface Operational area forms the boundary between the Underground and Open-cut operations and has been used to define areas of responsibility for this Care & Maintenance MO. This infrastructure typically includes buildings, warehouses, storage areas, conveyors, Main Ventilation fans, Gas Flares, Gas Drainage pumps and pipes, washdown areas, carparks and associated equipment WATER MANAGEMENT Water management areas include dirty water sumps and process water dams. The majority of these dams are located at the it-top Facilities area with a small pond at the Fan-Shaft- Flare site. The largest water management feature is the ossum Skin Dam which lies partly within the Underground Surface Operations area. Integra Underground (Glennies Creek Colliery) age 51

52 REHABILITATION AREA ASTURE Gaswell sites above the mining area are used to extract gas during and post mining. Some of these gaswells are no longer required for operational use and are being rehabilitated. Until final rehabilitation is achieved, they are being categorised as asture though site specifics may result in a grassland or woodland category UNDERGROUND MINING AREA (SM) The underground mining area overlies the active mining area and is subject to subsidence. In general, subsidence impacts at Integra Underground are low or minimal. (lan 3) As of June 2014, remedial subsidence work has been limited to Rail Line maintenance conducted by the Rail Line Owner. As this is a Care & Maintenance MO, there is no mining activity. Longwall 12 extraction ceased on the 22 nd April It is highly likely that more than 90% of the mining subsidence has occurred within 2 months of completion of mining. It is highly unlikely that the estimated residual subsidence (<10%) will result in significant impacts SECONDARY DOMAINS The Secondary domains (ost Mining Land Use Domains) are defined as land management units characterised by a similar post mining land use objective (i.e. following mining). These post Mining Land Use Domains for Integra Underground are limited to only a few categories owing to the nature of the surface within the lease boundaries. These Secondary Domains include the following INFRASTRUCTURE Two buildings will remain at the it-top Facilities site including the Oak ark School house and an adjacent brick residence. All other Operational infrastructure will be rehabilitated to other ost Mining Land Use categories WATER MANAGEMENT Water management features remaining post mining include dams at the former it-top Facilities site. The largest of these includes the remnants of the final void at the portal. The smaller dams, including the rocess Water Dam and Sedimentation Dam, will be rehabilitated to a clean water status. The final landform in this area will be shaped to allow drainage to the portal void. (lan 4) REHABILITATION AREA RURAL LAND CAABILITY CLASSIFICATION The majority of the rehabilitated areas will fall under the categories of Secondary Domain G with the Rural Land Capability Classifications being either IV- Moderate Capability or V- Moderate-Low Capability land. Integra Underground (Glennies Creek Colliery) age 52

53 CONSERVATION AND BIODIVERSITY OFFSET AREA Integra s approved Biodiversity Offset Strategy (BOS) was developed to offset the ecological impacts from the project on native vegetation and fauna habitat. Narrow leaved Ironbark Spotted Gum Grey Box Open Forest, which is part of the Central Hunter Ironbark Spotted Gum Grey Box Forest in the NSW North Coast and Sydney Basin Bioregions Endangered Ecological Community (EEC) (the Central Hunter Ironbark Spotted Gum Grey Box Forest EEC) and Swamp Oak Floodplain Forest of the NSW North Coast, Sydney Basin and South East Corner Bioregions EEC (Swamp Oak Floodplain Forest EEC), are the only intact EECs listed under the TSC Act that have been impacted by approved mining operations at the Complex. The approved BOS included four offset areas; namely, the Northern, Southern, Western and Supplementary Biodiversity Offset Areas (BOAs), and was subsequently amended to include the Bridgman BOA. The Martin s Creek BOA was later incorporated to further compensate for vegetation clearance associated with the Open Cut and Underground rojects and to meet the requirements of the consolidated roject Approvals. In total, the approved BOS currently comprises hectares (ha) of BOAs These are currently managed in accordance with the Integra Biodiversity Management lan (BM) (VALE 2013). The BM includes a range of management measures to be implemented to improve the biodiversity values of the BOAs over time. This includes fencing, grazing management, weed control, fire management, access management, feral and overabundant native herbivore and pest management, habitat creation and supplementary planting. The Underground mine Surface Operational area contains part of the Approved Western Biodiversity Offset Area (WBOA). It should be noted that this area is currently under review as part of an application to modify the approved Biodiversity Offset Areas. 5.2 Domain Rehabilitation Objectives (Level 1 Mines only) The following are the common objectives of all domains: Safety risks are eliminated as far as reasonably practicable; The final landform will be stable and fit for purpose; A stable free draining landform, capable of supporting pasture and/or sustainable ecosystems of native trees and shrubs; Ecological diversity will be maintained or enhanced; Where possible rehabilitation works do not impact on sites/ areas of Aboriginal cultural heritage; romote biodiversity through weed and feral animal control programs; The agriculture value of the lands will be sustained or enhanced in a manner consistent with the mining plans; and The most direct environmental impact on flora and fauna arising from the Integra Underground roject is subsidence, which causes changes in the level of the ground surface overlying and adjacent to the area of extraction. The key impacts predicted to occur include tilt, strain, subsidence ponding, cracking, clearing for remediation works and alterations to surface water flows. To date, limited impacts have occurred with no remedial works required other than for rail track maintenance. The minor clearance of grassland for the gas drainage boreholes will not significantly reduce grassland habitat resource such that the lifecycle of dependent species is affected. No direct Integra Underground (Glennies Creek Colliery) age 53

54 vegetation clearance or loss of nesting resources is expected as a result of the predicted levels of subsidence. The majority of rehabilitation relating to the Underground roject Domains will occur at mine closure. This report contains the broad details of a Conceptual Mine Closure lan. A commitment has been made to provide a more detailed closure plan within 12 months of the commencement date of this MO period. Rehabilitation during the Care & Maintenance period will be limited to gaswell rehabilitation and shaft construction site rehabilitation. The rehabilitation objectives for the gaswell sites are to return them to a Land Capability IV or V category depending on specific site characteristics. The rehabilitation objectives for the shaft construction site include a combination of hardstand and temporary grassed area. Gas Drainage Borehole Sites All rehabilitation activities associated with gas drainage boreholes will be addressed as part of the Integra Coal Underground Generic Gaswell Rehabilitation lan. As such, rehabilitation of gas drainage borehole sites and the access tracks to those sites (where required) will be undertaken progressively once the quality / quantity of the vented gas falls below predetermined levels, and will involve the following activities. Drill Hole Site 1. Removal of extraction equipment 2. Borehole sealing in accordance with DMR Guidelines. 3. Removal of compound fence. 4. Removal of any concrete slabs and hardstand materials and re-establishment of pre-disturbance landform. 5. Excavation of consolidated materials in the drill sump / sediment dam and their removal to the Integra Coal Underground ortal Area for disposal. 6. Replacement of formerly stockpiled spoil within the drill sump / sediment dam. 7. Ripping the compound area and any other compacted surfaces parallel to contour. 8. Replacement of topsoil to the compound area and drill sump. 9. Scarifying topsoiled surfaces and the former soil stockpile area. 10. Installation of drainage controls (if necessary). 11. Application of seed and fertilizer to areas of disturbance using the Integra Coal nominated seed mix or as requested by landowner. Drill Hole Site Access 1. Removal of hardstand materials (if installed and not to be retained at the request of the landowner). 2. Access Road surface scarification. 3. Application of a seed and fertilizer as requested by the landowner(s). lan 4 shows gaswell status which includes sealed gaswells; gaswells required for EDL power generation; gaswells connected to the flare site; gaswells to be rehabilitated during the first year of C&M and also Years 2-3. Shaft Construction Site A rehabilitation plan for the shaft construction site is currently being developed. The broad approach to this plan includes:- Drainage of the shaft construction process water dams Capping of the drained dams Integra Underground (Glennies Creek Colliery) age 54

55 Ground preparation of the capped dams Application of seed and fertilizer Minimise dirty water catchment 5.3 Rehabilitation hases The final rehabilitation objective (i.e. post-mining) is the development across the site of sustainable ecosystems that are representative of the adjacent landscape. This rehabilitation can be conceptually described by a series of phases such as: - hase 1 Decommissioning - Infrastructure removed, contamination remediated, electricity decommissioned, heritage buildings retained (removal of hard stand areas, buildings, contaminated materials, hazardous materials); - hase 2 Landform Establishment incorporates gradient, slope, aspect, drainage, substrate material characterisation and morphology; - hase 3 Growth Medium Development incorporates physical, chemical and biological components of the growing media and ameliorants that are used to optimise the potential of the media in terms of the preferred vegetative cover; - hase 4 Ecosystem and Land use Establishment incorporates revegetated lands and habitat augmentation; species selection, species presence and growth together with weed and pest animal control / management and establishment of flora; Subsurface Development. - hase 5 Ecosystem and Land use Sustainability incorporates components of floristic structure, nutrient cycling recruitment and recovery, community structure and function; fauna presence, growth, ecosystem resilience; Infrastructure Development; and - hase 6 - Land Relinquishment land use and landscape is deemed as suitable to be relinquished from the Mining Lease; Demonstrated ultimate success of the rehabilitation process. This may be biophysical or physical. ASHTON COAL MINING OERATIONS LAN Table 5-4 shows the relevant rehabilitation phases for each domain, based on the post mining land use and landscape. The aim of this table is to provide a summary of completed phases for each domain at the end of the MO period. As this is a Care & Maintenance MO with little activity during the MO period, the mine closure activities have also been indicated. X - Active rehabilitation phases during the term of this MO Z Mine Closure rehabilitation phases during the term of this MO Integra Underground (Glennies Creek Colliery) age 55

56 Table 5-4 Rehabilitation hases - rimary Domain based on ost Mining Land Use Domain Rehabilitation hase Infrastructure Areas Underground it-top Facilities - Infrastructure Ventilation Shaft & Gas Flare site - Infrastructure Surface Gaswell sites - Infrastructure rocess Water Dams it- Top facility rocess Water Dams Vent shaft site Stockpiled Material Shaft Construction site Void (Open cut void it- Top ortal area) Surface Gaswell sites Rehab. Area asture Underground Mining Area (SM) Conservation and Biodiversity Offset Area hase 1 Decommissioning hase 2 Landform Establishment hase 3 Growth Medium Development hase 4 Ecosystem and Land use Establishment hase 5 Ecosystem and Land use Sustainability hase 6 Land Relinquishment Z Z Z X Z X Z Z Z Z Z X Z X Z Z Z Z Z X Z X Z Z Z Z Z Z X Z Z X Z Z Z X Z X Z Z X X Z Z Z Z X Z Z Z X Z HASE 1 - DECOMMISSIONING For this C&M MO, the decommissioning processes include the removal of gaswell infrastructure hard stand areas, buildings, contaminated materials and hazardous materials. The decommissioning of approximately 6 gaswells per year are scheduled to occur during the term of this MO. Temporary infrastructure used for shaft construction will be decommissioned as part of the Shaft Construction site rehabilitation plan. This infrastructure may include process water dams and temporary offices and storage containers. The appropriate performance indicators, measures and criteria will be established and reported in the AR HASE 2 - LANDFORM ESTABLISHMENT For this C&M MO, Landform Establishment involves achieving stable landforms including slopes, erosion controls, and drainage lines with integrated landscape features, which are compatible with surrounding landforms, whilst ensuring that the rehabilitated areas of native vegetation link with undisturbed native vegetation, where possible. Integra Underground (Glennies Creek Colliery) age 56

57 The gaswell sites are limited in aerial extent and are located on generally flat undulating grassland. re-mining landforms are usually achieved with little surface disturbance within a short time frame. The shaft construction site is within a shaft compound which will be maintained until mine closure. The landform of the shaft construction process water dams will suit the water management drainage requirements of the shaft compound. The criteria, performance measures and indicators for the landform establishment stage is provided for relevant domains in Table 6-1 Rehabilitation Table for Care & Maintenance MO HASE 3 - GROWTH MEDIUM DEVELOMENT For this C&M MO, Growth Medium Development incorporates the processes involved to achieve a soil which is capable of supporting a sustainable plant community. It includes consideration of the chemical, physical and biological properties of the media and takes into account issues such as the specialist requirements (e.g. soil ameliorants) aligned to the revegetation of the disturbed areas, whilst also incorporating consideration of land use both for grazing and biodiversity that may deviate from the traditional post mining land use. The gaswell rehabilitation growth medium development is based on ripping of the compound and access road and scarifying the topsoil and the application of fertiliser and seed. The criteria, performance measures and indicators for the growing media development stage are provided for relevant domains in Table 6-1 Rehabilitation Table for Care & Maintenance MO HASE 4 - ECOSYSTEM AND LAND USE ESTABLISHMENT For this C&M MO, the Ecosystem and Land use Establishment phase incorporates:- For gaswell sites, the application of suitable seed to the ripped and scarified areas. For shaft construction area, the development of hardstand or grassland with the subsequent application of suitable seed to the ripped and scarified zone The general approach for this phase will also include the following considerations though the limited size and nature of the rehab areas may impact on the effective application of available techniques: Management and control of weed and vertebrate pest species; Establishment assessment of land capability and agricultural suitability; Optimising carrying capacity and/or stocking rates; Appropriate flora species selection in terms of the revegetation program (seed selection); Enhancing opportunities for nutrient cycling; Optimising use of onsite resources e.g. woody debris, rock, mulch in terms of habitat creation and / or final land use; and Developing and implementing techniques that focus on the habitat enhancement including tree hollow salvaging. The criteria, performance measures and indicators for ecosystem and land use establishment are provided for relevant domains in Table 6-1 Rehabilitation Table for Care & Maintenance MO. Integra Underground (Glennies Creek Colliery) age 57

58 HASE 5 - ECOSYSTEM AND LAND USE SUSTAINABILITY For this C&M MO, Ecosystem and Land use Sustainability incorporates the general principles of: Development of land use and land capability which is consistent with the surrounding areas; Nutrient Cycling; Development of land use options that provide optimal and sustainable social and economic benefit to the local community; Species diversity and abundance for both flora and fauna; Development of profiles in the growing media; and Vegetation communities capable of withstanding catastrophic events e.g. bushfire and extensive drought. The criteria, performance measures and indicators for ecosystem and land use sustainability are provided for relevant domains in Table 6-1 Rehabilitation Table for Care & Maintenance MO. The domains and rehabilitation phases identified during the life of the MO are shown on lan 3. The conceptual final landform and indicative land use post mine closure is shown in lan LAND RELINQUISHMENT For this C&M MO, Land Relinquishment for the shaft construction site will occur at mine closure. More detailed information on this aspect will be available in a detailed mine closure plan which will be developed within 12 months of entering the commencement date of this Care & Maintenance MO. Gaswell site Land Relinquishment occurs following establishment and demonstrated sustainability of the post mining land use ecosystem. In nearly all cases this is represented by the site returning to grassland identical to adjacent areas. The land relinquishment generally aligns with the expiry of the sub-lease from the landowner. Integra Underground (Glennies Creek Colliery) age 58

59 6 e r f o r m a n c e I n d i c a t o r s, a n d C o m p l e t i o n/ R e l i n q u i s h m e n t C r i t e r i a erformance indicators and associated completion/relinquishment criteria are appropriate to the location and relevant to the stated rehabilitation goal and rehabilitation objectives for each mine domain. Each indicator relates to guidelines, project approvals, industry standards, scientific literature or other sources such as rehabilitation trials and analogue sites, as appropriate. Rehabilitation indicators and performance criteria go hand in hand insofar as: erformance indicator is an attribute of the biophysical environment (e.g. ph, slope, topsoil depth, biomass) that can be used to approximate the progression of a biophysical process. It can be measured and audited to demonstrate (and track) the progress of an aspect of rehabilitation towards a desired completion/relinquishment criterion (i.e. defined end point). The indicator may be aligned to an established protocol and used to evaluate changes in a system. Completion/Relinquishment criteria are objective target levels or values that can be measured to quantitatively demonstrate the progress and ultimate success of a biophysical process. These are the standards that are to be met by successful rehabilitation. They will generally be in the form of a numerical value that can be verified by measurement of the indicators selected for the rehabilitation objectives. They may include an element based on time. The performance indicators in this Care & Maintenance MO are designed to provide the ability to track the development of sustainable ecosystems through a series of conceptual stages in order to ensure that the completion/relinquishment criteria are met. The use of this approach allows for early intervention where desired rehabilitation trends are not being achieved. In this case, an adaptive management or contingency management approach can be used to respond in the event of poor rehabilitation performance or unexpected results. erformance Indicators have been selected following a review of regulatory requirements, relevant guidelines, standards, scientific literature and a review of the surrounding environment. Indicators directly support the rehabilitation objectives with a view to achieving the post mining land use. For a natural system, numerous indicators, relating to various biophysical attributes, are generally required to demonstrate overall rehabilitation success. The careful selection of indicators is vital to the outcome of the rehabilitation effort as these will be used to represent the biophysical processes of a rehabilitated system. In this C&M MO, indicators of physical, chemical and biological processes that can be reliably used to demonstrate the progressive success of each rehabilitation phase have been selected. Selected indicators are reflective of essential biophysical processes and they can be readily measured in a statistically robust and repeatable manner. erformance indicators and completion criteria have been nominated as reasonably achievable target levels or values. In some instances subjective criteria or ranges of values have been more appropriate for certain indicators where uncertainty has existed. Completion criteria have been nominated for each phase of rehabilitation so that rehabilitation success Integra Underground (Glennies Creek Colliery) age 59

60 can be quantitatively tracked throughout the life of the mine. It should be noted that the development of suitable completion criteria is an iterative process and acceptable values or levels may change over time with advances in research and technology. Completion criteria will be achieved at each successive phase of rehabilitation in order to proceed to the next phase. Demonstration of completion criteria to permit the release of security will be achieved by the use of recording techniques including photography, statistical analysis, qualitative reporting, chronological comparative analysis and adjacent land capability analysis. Integra Underground (Glennies Creek Colliery) age 60

61 Table 6-1 Rehabilitation Table for Care & Maintenance MO Objective erformance Indicator hase Decommissioning Domain Infrastructure Gaswell sites decommissioned and infrastructure removed Shaft Construction site decommissioned and infrastructure removed Gaswell headwork and concrete slabs removed Access road removed Construction process dams drained and capped hase Landform Establishment Domain Infrastructure Gaswell Sites Landforms to be safe, stable and non-polluting Final landform shape adequate as assessed by surveyor and/or environmental advisor Landform surface drainage contours are adequately water shedding Erosion and sediment controls installed and operated effectively to reduce rill / sheet erosion erformance Measure Quarterly Rehabilitation Inspections Quarterly Rehabilitation Inspections Quarterly Rehabilitation Inspections Quarterly Rehabilitation Inspections Quarterly Rehabilitation Inspections Quarterly Rehabilitation Inspections Completion criteria Justification / Source Complete (Yes/No) Complete removal of gaswell items Complete removal of access road Construction process dams drained and capped ready for surface shaping Consistent with surrounding landform, where practical and aligned with relevant approvals No unplanned pooling of water No identifiable rill or sheet erosion roject Approval Condition 56 roject Approval Condition 56 roject Approval Condition 56 roject Condition 56 roject Condition 56 roject Condition 56 Approval Approval Approval Link to TAR rogress at start of MO Completed as Continuing gaswells become redundant Completed as Continuing gaswells become redundant No Not commenced Completed as gaswells become redundant Completed as gaswells become redundant Completed as gaswells become redundant 5.0 Continuing 5.0 Continuing 5.0 Continuing Integra Underground (Glennies Creek Colliery) age 61

62 Objective erformance Indicator erformance Measure Domain Vent Shaft Construction Site Landforms to be Surface contours Quarterly safe, stable and assessed as Rehabilitation non-polluting adequate by Inspections surveyor and/or environmental advisor Capping of Commissioned process dam Geotechnical completed to site Report standards hase Growth Medium Development Domain Infrastructure Gaswell Sites Growth medium developed to sustain grassland ecosystem Growth medium developed to sustain grass ecosystem in compound Topsoil depth and quality, weed % Rehabilitation Monitoring 12 months after establishment and then every 2 years Soil fertility Rehabilitation comparable to Monitoring 12 adjacent months after landscape establishment and then every 2 years Vent Shaft Construction Site Grass coverage Rehabilitation across the site Monitoring 12 comparable to months after adjacent establishment landscape (i.e. %, and then every species type, 2 years weed %) Soil fertility Rehabilitation comparable to Monitoring 12 months after Completion criteria Justification / Source Complete (Yes/No) Surface contours as per shaft compound water management plan requirements Capping final form signed off by Geotechnical expert As per adjacent landscape & gaswell rehabilitation plan As per adjacent landscape & gaswell rehabilitation plan As per adjacent landscape & shaft site rehabilitation plan As per adjacent landscape & shaft site rehabilitation plan roject Condition 56 roject Condition 56 roject Approval Condition 56 roject Approval Condition 56 roject Condition 56 roject Condition 56 Approval Approval Approval Approval Link to TAR rogress at start of MO No 5.0 Not commenced No 5.0 Not commenced Completed as gaswells become redundant Completed as gaswells become redundant 5.0, 7.0 Continuing 5.0 Continuing No 5.0, 7.0 Not commenced No 5.0 Not commenced Integra Underground (Glennies Creek Colliery) age 62

63 Objective erformance Indicator adjacent landscape erformance Measure establishment and then every 2 years hase Ecosystem and Land Use Establishment Domain Infrastructure Gaswell Sites Establishment of a representative number of species and at similar density to adjacent ecological grassland Species richness; presence of recalcitrant species, weed % Vent Shaft Construction Site Establishment of Species richness; a representative presence of number of species recalcitrant and at similar species, weed % density to adjacent ecological grassland Rehabilitation Monitoring 12 months after establishment and then every 2 years Rehabilitation Monitoring 12 months after establishment and then every 2 years hase Ecosystem and Land Use Sustainability Domain Infrastructure Gaswell Sites Vegetation developing in structure and complexity to that of the adjacent remnant vegetation No water pollution from site Groundcover %, species type, weed % Water turbidity, electrical conductivity, ph Rehabilitation Monitoring 12 months after establishment and then every 2 years Water Quality monitoring in accordance with the Completion criteria Justification / Source Complete (Yes/No) As per adjacent landscape & gaswell rehabilitation plan As per adjacent landscape & shaft rehabilitation plan As per adjacent landscape & gaswell rehabilitation plan As per adjacent landscape & gaswell rehabilitation plan roject Condition 56 roject Condition 56 roject Condition 56 roject Condition 56 Approval Approval Approval Approval Completed as gaswells become redundant Link to TAR rogress at start of MO 7.0 Continuing No 7.0 Not commenced Completed as gaswells become redundant Completed as gaswells become redundant 5.0, 7.0 Continuing 5.0 Continuing Integra Underground (Glennies Creek Colliery) age 63

64 Objective The number of grass species comprising the vegetation community is comparable to that of analogue sites (no. species/area). The vegetation is developing in structure and complexity comparable to that of the adjacent remnant vegetation No water pollution from site The number of grass species comprising the vegetation community is comparable to that of analogue erformance Indicator Grass cover %, species type, weed % erformance Measure approved ICO Water Management lan Rehabilitation Monitoring 12 months after establishment and then every 2 years Completion criteria Justification / Source Complete (Yes/No) As per adjacent landscape & gaswell rehabilitation plan & Landscape Management lan Vent Shaft Construction Site Groundcover, %, Rehabilitation As per adjacent species type, Monitoring 12 landscape & shaft weed % months after rehabilitation plan establishment and then every 2 years Water turbidity, electrical conductivity, ph Grass cover, %, weed % Water Quality monitoring in accordance with the approved ICO Water Management lan Rehabilitation Monitoring 12 months after establishment and then every 2 years As per adjacent landscape & shaft rehab plan As per adjacent landscape & shaft rehabilitation plan & Landscape Management lan roject Condition 56 roject Condition 56 roject Condition 56 roject Condition 56 Approval Approval Approval Approval Completed as gaswells become redundant Link to TAR rogress at start of MO 5.0, 7.0 Continuing No 5.0, 7.0 Not commenced No 5.0 Not commenced No 5.0, 7.0 Not commenced Integra Underground (Glennies Creek Colliery) age 64

65 Objective erformance Indicator sites (no. species/area). asture Underground Mining Area (SM) Surface Results of visual disturbance/ hazards inspection and Rehabilitation works do not impact on sites/ areas of Aboriginal cultural heritage. ongoing subsidence monitoring activities. ermanent subsidence cracking repaired by filling or ripping. Works completed in compliance with requirements of the Aboriginal Cultural Heritage Management lan erformance Measure In accordance with the approved SM Due diligence report (as required). Completion criteria Justification / Source Complete (Yes/No) No visible subsidence cracking. Compliance with permits. Location of listed archaeological item. roject Approval Condition 56 roject Condition 47 Approval Link to TAR rogress at start of MO No 5.0 Not commenced No 5.0 Not commenced Integra Underground (Glennies Creek Colliery) age 65

66 Conceptual Mine Closure Rehabilitation lan The nature of the underground operations require that the majority of surface infrastructure is operational until mine closure. Such infrastructure includes the it-top Facilities area and the Shaft and Gas Flare compound areas. A detailed Mine Closure lan will be developed within 12 months of the start of the Care & Maintenance period. The following Table is based on Conceptual Mine Closure investigations. (Gaswell site rehabilitation will be on-going as per the C&M Rehabilitation Table 6-1 Rehabilitation Table for Care & Maintenance MO. It is envisaged that shaft construction site rehabilitation will be complete prior to the expiry of the initial 3 year period. Accordingly, the following Table excludes reference to gaswell or shaft construction site rehabilitation.) Integra Underground (Glennies Creek Colliery) age 66

67 Mining Operations lan 1 September 2014 to 31 August R e h a b i l i t a t i o n I m p l e m e n t a t i o n 7.1 Status at MO Commencement This information is presented graphically in lan 2. Information pertaining to the status of the domains is shown in Table 7-1 rimary Domains and Table 7-2 Secondary Domains. Table 7-1 rimary Domains rimary Domain Code Status Underground it-top Facilities - Infrastructure 1 Active Ventilation Shaft & Gas Flare site - Infrastructure 1 Active Surface Gaswell sites - Infrastructure 1 Active rocess Water Dams it-top facility 3 Active rocess Water Dams Vent shaft site 3 Active Stockpiled Material Shaft Construction site 5 Active Void (Open cut void it-top ortal area) 6 Active Surface Gaswell sites Rehab. Area asture 7 Active Underground Mining Area (SM) 8 Active Conservation and Biodiversity Offset Area 9 Maintenance Table 7-2 Secondary Domains Secondary Domain (rimary - Secondary Code Status Underground it-top Infrastructure - Rehab Rural Land G (IV or V) Not Active Ventilation Shaft & Gas Flare site Infrastructure - Rehab Rural G (IV or V) Not Active Land Surface Gaswell sites Infrastructure - Rehab Rural Land G IV Not Active rocess Water Dams it-top facility Water Management B Not Active rocess Water Dams Vent shaft site Water Management B Not Active Stockpiled Material Shaft Construction site - Rehab Rural Land G V Not Active Void (Open cut void it-top ortal area) - Rehab Rural Land G (IV or V) Not Active Void (Open cut void it-top ortal area) Water B Not Active Management Surface Gaswell sites Rehab. Area asture Relinquished H Maintenance Lands Underground Mining Area (SM) Relinquished Lands H Not Active Conservation and Biodiversity Offset Area - Biodiversity Offset Area J Maintenance Integra Underground (Glennies Creek Colliery) age 67

68 Mining Operations lan 1 September 2014 to 31 August roposed Rehabilitation Activities during the MO Term Rehabilitation activities to be completed during this care and maintenance MO will be confined to decommissioned gas drainage sites and areas of the Vent Shaft Site at ML1676. An estimated 6 gaswell sites will be rehabilitated per year. As detailed in Section 2.3.9, 13 gaswells have already been relinquished, while a further 10 have been recently rehabilitated following their decommissioning. Twenty-two gaswells are currently available for rehabilitation and will be completed in line with the rehabilitation schedule. lan 4 in Section depicts the locations of gaswell site by their current status. Eight hectares is also scheduled for rehabilitation at the Vent Shaft Site encompassing the decommissioning and rehabilitation of process dams, hardstand areas, drill cuttings stockpiles and access roads. Figure 7.1 shows the indicative areas of rehabilitation at the Vent Shaft Site No additional land will be disturbed during the term of the C&M MO. Details on the rehabilitation and disturbance rates during the life of the C&M MO are shown in Table 7-3. Table 7-3 Rehabilitation and Disturbance Rates during the life of the C&M MO Year Start 2014 Total Disturbance Area (Ha) Total Rehab Area (Ha) (per MO Year) Cumulative Rehabilitation Area (Ha) Comments 63 9 it-top Facilities area (43 Ha); Shaft & Flare area (8Ha); Gaswell sites (9.5Ha disturbed; 9Ha rehab) Vent Shaft Construction Site rocess Dams & minor drainage works Waste stockpiles and sediment dams Hardstand areas and roads/tracks Gaswells Gaswell sites (6 x 10m x 3m) Gaswell sites (6 x 10m x 3m) Gaswell sites (6 x 10m x 3m) 7.3 Summary of Rehabilitation Areas during the MO Term Limited rehabilitation works will be undertaken during the term of the MO. Work will primarily be carried out at the Vent Fan Site and at dis-used gaswell sites. Table 7-4 below summarises the rehabilitation domains at the start and end of the MO term and Figure 7.1 shows the indicative disturbance ad rehabilitation areas at the Vent Fan Site lease. Integra Underground (Glennies Creek Colliery) age 68

69 Mining Operations lan 1 September 2014 to 31 August 2017 rimary Domain Table 7-4 Rehabilitation Domains hases Start and End of MO Secondary Domain Code (with map legend) Rehabilitation hase Area at start of MO (ha) Infrastructure Rural Land (V) 1G(V) Active Infrastructure Rural Land (V) 1G(V) Relinquished 9 9 Land Water Rural Land (V) 1G(V) Active Management Biodiversity Area Biodiversity Area 9J Maintenance Area at end of MO (ha) Integra Underground (Glennies Creek Colliery) age 69

70 Mining Operations lan 1 September 2014 to 31 August 2017 Figure 7-1 Vent Fan Site Rehabilitation Areas Integra Underground (Glennies Creek Colliery) age 70