Mining Operations Plan 2014-2022 Peak Hill Gold Mine

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

MINING OPERATIONS PLAN 2014-2022 for PEAK HILL GOLD MINE (Incorporating a Rehabilitation Management Plan)

September 2014

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

MINING OPERATIONS PLAN 2014-2022 for

PEAK HILL GOLD MINE

(Incorporating a Rehabilitation Management Plan)

Prepared by: Alkane Resources Ltd Telephone: (08) 9227 5677 ABN: 35 000 689 216 Facsimile: (08) 9227 8178 Ground Floor 89 Burswood Road Email: [email protected] BURSWOOD WA 6100

Cover Photo: Northwest sediment pond and WRE Aug 2014

September 2014 MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

This Copyright is included for the protection of this document

All intellectual property and copyright reserved.

Apart from any fair dealing for the purpose of private study, research, criticism or review, as permitted under the Copyright Act, 1968, no part of this report may be reproduced, transmitted, stored in a retrieval system or adapted in any form or by any means (electronic, mechanical, photocopying, recording or otherwise) without written permission. Enquiries should be addressed to Alkane Resources Ltd..

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

CONTENTS Page

1. INTRODUCTION ...... 9 1.1 SCOPE AND FORMAT ...... 9 1.1.1 Scope 9 1.1.2 Format of this Document ...... 9 1.2 HISTORY OF OPERATIONS ...... 10 1.3 CURRENT CONSENTS, AUTHORISATIONS AND LICENSES ...... 10 1.4 LAND OWNERSHIP AND LAND USE ...... 12 1.5 STAKEHOLDER CONSULTATION ...... 13 1.5.1 Community Consultation ...... 13 1.5.2 Government Agency Consultation ...... 13 2. PROPOSED MINING ACTIVITIES ...... 13 2.1 PROJECT DESCRIPTION ...... 13 FIGURE 1 SITE LAYOUT ...... 15 2.2 ACTIVITIES OVER THE MOP TERM ...... 17 2.2.1 Exploration ...... 17 2.2.2 Construction ...... 17 2.2.3 Rock/Overburden Emplacement ...... 17 2.2.3.1 Introduction ...... 17 2.2.3.2 Waste Rock Emplacement Area...... 18 2.2.3.3 Waste Rock Characteristics ...... 18 2.2.3.4 Waste Rock Emplacement Methods ...... 18 2.2.4 Processing Residues...... 19 2.2.4.1 Design Criteria and Status ...... 19 2.2.4.2 Residue Transfer Method ...... 19 2.2.5 Waste Management ...... 19 2.2.6 Decommissioning and Demolition Activities ...... 20 2.2.7 Temporary Stabilisation ...... 20 2.2.8 Progressive Rehabilitation and Completion ...... 20 2.2.9 Material Production Schedule during MOP Term ...... 21 3. ENVIRONMENTAL ISSUES MANAGEMENT ...... 21 3.1 ENVIRONMENTAL RISK ASSESSMENT ...... 21 3.2 ENVIRONMENTAL RISK MANAGEMENT ...... 25 3.2.1 Specific Risks relating to Rehabilitation ...... 25 4. POST MINING LAND USE ...... 26 4.1 REGULARTORY REQUIREMENTS ...... 26 4.2 POST MINING LAND USE GOAL ...... 26 4.3 REHABILITATION OBJECTIVES ...... 29 5. REHABILITATION PLANNING AND MANAGEMENT ...... 30 5.1 DOMAIN SELECTION ...... 30 5.1.1 Introduction ...... 30 5.1.2 Primary Domains ...... 30 5.1.2.1 Domain 1 – Infrastructure Areas ...... 30 5.1.2.2 Domain 2 – Residue Storage Facility ...... 31 5.1.2.3 Domain 3 – Water Management Areas ...... 31 MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

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5.1.2.4 Domain 4 – Waste Rock Emplacements ...... 31 5.1.2.5 Domain 5 – Stockpiled Material ...... 31 5.1.2.6 Domain 6 – Open Cut Voids ...... 31 5.1.2.7 Domain 7 – Rehabilitation Area ...... 31 5.1.2.8 Domain 9 – Conservation and Biodiversity Offset Areas ...... 31 5.1.2.9 Domain 10 – Rural Lands ...... 31 5.1.3 Secondary Domains ...... 32 5.1.3.1 Domain A – Infrastructure ...... 32 5.1.3.2 Domain B – Water Management Areas ...... 32 5.1.3.3 Domain C – Rehabilitation Area – Grassland ...... 32 5.1.3.4 Domain E – Rehabilitation Area –Woodland ...... 32 5.1.3.5 Domain G – Rehabilitation Area – Rural Land ...... 33 5.1.3.6 Domain I – Final Voids ...... 33 5.1.3.7 Domain J – Conservation and Biodiversity Areas ...... 33 5.2 REHABILITATION DOMAIN OBJECTIVES ...... 33 5.3 REHABILITATION PHASES ...... 33 6. PERFORMANCE INDICATORS, AND COMPLETION/RELINQUISHMENT CRITERIA ...... 38 7. REHABILITATION IMPLEMENTATION...... 51 7.1 STATUS AT MOP COMMENCEMENT ...... 51 7.2 PROPOSED REHABILITATION ACTIVITIES DURING THE MOP TERM ...... 51 7.2.1 Introduction ...... 51 7.2.2 Domain 1 – Infrastructure Area...... 51 7.2.3 Domain 2 - Residue Storage Facility – Heap Leach ...... 52 7.2.4 Domain 3 – Water Management Area ...... 52 7.2.5 Domain 4 – Waste Rock Emplacement ...... 52 7.2.6 Domain 5 – Soil Stockpile ...... 53 7.2.7 Domain 6 – Open Cut Voids ...... 53 7.2.8 Domain 7 – Rehabilitated Areas ...... 53 7.2.9 Domain 9 - Conservation and Biodiversity Areas ...... 53 7.2.10 Domain 10 – Rural Land ...... 53 7.3 SUMMARY OF REHABILITATION AREAS DURING THE MOP TERM ...... 53 7.4 RELINQUISHMENT PHASE ACHIEVED DURING MOP PERIOD ...... 55 8. REHABILITATION MONITORING AND RESEARCH ...... 55 8.1 REHABILITATION MONITORING ...... 55 8.2 RESEARCH AND REHABILITATION TRIALS ...... 55 9. INTERVENTION AND ADAPTIVE MANAGEMENT ...... 62 9.1 THREATS TO REHABILITATION ...... 62 9.2 TRIGGER ACTION RESPONSE PLAN ...... 62 10. REPORTING...... 62 11. REVIEW AND IMPLEMENTATION OF THE MOP ...... 66 11.1 REVIEW OF THE MOP ...... 66 11.2 IMPLEMENTATION ...... 66 MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

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12. REFERENCES ...... 66 PLANS AND SECTION ...... 68 PLAN 1A PRE MINING ENVIRONMENT – PROJECT LOCATION ...... 70 PLAN 2 MINE DOMAINS AT COMMENCEMENT OF MOP ...... 71 PLAN 3A MINING AND REHABILITATION – END YEAR 1 ...... 72 PLAN 3B MINING AND REHABILITATION – END YEAR 6 ...... 73 PLAN 3C MINING AND REHABILITATION – END OF MOP ...... 74 PLAN 4 FINAL REHABILITATION AND POST MINING LAND USE – 2022 ...... 75 PLAN 5A CROSS SECTION A ...... 76 APPENDICES ...... 77 APPENDIX I MINING LEASE ...... 77 APPENDIX II DA 648/93 ...... 77 APPENDIX III SECURITY CALCULATION ESTIMATE ...... 77 APPENDIX IV ENVIRONMENT PROTECTION LICENCE 5473...... 77 APPENDIX V TOURIST MINE PERMIT ...... 77

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

CONTENTS Page

TABLES Table 1 Summary of Required Tables, Figures and Plans ...... 10 Table 2 Current Consents, Authorisations and Licenses ...... 11 Table 3 Major Assets per Domain ...... 16 Table 4 Indicative Waste Rock Emplacement Design Criteria ...... 18 Table 5 Non-Production Waste Management ...... 20 Table 6 Qualitative Consequence Rating ...... 22 Table 7 Qualitative Likelihood Rating ...... 22 Table 8 Qualitative Risk Rating ...... 22 Table 9 Key Rehabilitation-related Risks during the MOP Term ...... 24 Table 10 Regulatory Requirements for Rehabilitation ...... 28 Table 11 Rehabilitation Objectives ...... 29 Table 12 Primary and Secondary MOP Domains ...... 30 Table 13 Rehabilitation Domain Objectives ...... 36 Table 14 Summary of Rehabilitation Phases proposed for Completion at the end of the MOP ...... 39 Table 15 Rehabilitation Performance Indicators and Completion Criteria ...... 40 Table 16 Status of Rehabilitation at the Commencement of the MOP ...... 51 Table 17 Rehabilitation at Commencement and Completion of MOP ...... 54 Table 18 Rehabilitation Monitoring Methodology and Frequency ...... 56 Table 19 Analysis of Rehabilitation Threats Threats ...... 63 Table 20 Trigger Action Response Plan ...... 64 Table 21 Roles and Responsibilities for MOP Implementation ...... 66

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

1. INTRODUCTION 1.1 SCOPE AND FORMAT 1.1.1 Scope This Mining Operations Plan (MOP) for the Peak Hill Gold Mine (“the Mine”) has been prepared by Alkane Resources Ltd (“the Company”) to take the leases through to relinquishment or renewal by 17 January 2022. This document outlines the rehabilitation and mine closure objectives for the site. The Mine is located immediately east and northeast of the township of Peak Hill, in the Central West of NSW (Figure 1). The Mining Leases (MLs) were issued in 1993, 1994, 1995 and 2001. The key MLs for the Peak Hill Gold were issued to Alkane by the Minister for Mineral Resources in 1993 (see Appendix I). As additional resources were identified through exploration drilling, additional MLs were granted to form a contiguous area for mining and gold processing For the purpose of this document the area covered by MLs is referred to as the “Mine Site”. The operations described in this MOP comply with the letter of direction from Trade & Investment Resources & Energy dated 25 June 2013. This second draft of the MOP has been informed by a letter and email from Trade & Investment Resources & Energy (DRE) dated 2 September 2014. Consent Conditions Development Application 648/93, issued by the Parkes Shire Council on 2 September 1993 is contained in Appendix II). This MOP replaces the MOP letter report dated 23 April 2013. The duration of the second MOP is for 7 years from 1 July 2014 to 17 January 2022. This document incorporates the Rehabilitation Management Plan required under Condition 3(53) of new Project Approvals.

1.1.2 Format of this Document This MOP has been prepared in accordance with the guideline ESG3: Mining Operations Plan (MOP) Guidelines, September 2013 (“the Guideline”) and provides detailed information on mining, processing and rehabilitation operations within the Peak Hill Gold Mine MLs. The MOP also provides information to demonstrate the environmental risks associated with the operations on MLs are being appropriately managed and mitigated. Table 1 provides a summary of where the required tables, figures and plans are presented in this MOP. The format generally complies with that provided under the heading ‘Compiling a Mining Operations Plan’ in the Guidelines and by doing so also provides the Rehabilitation Management Plan for the mine. An updated rehabilitation security deposit calculation, prepared using the Department’s security estimation tool (version 1.12), is also included with this MOP as Appendix III. MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Table 1

Summary of Required Tables, Figures and Plans

Section of MOP Table/Plan Reference1 Source iv MOP Title Block 1.1.2 Summary of Required Tables, Figures and Plans MOP 2.2.10 Material Production Schedule during MOP term MOP 4.3 Summary Rehabilitation Phases for end of MOP term MOP 5.0 Disturbance and Rehabilitation Progression during MOP term MOP 6.0 Rehabilitation Data Table MOP 11 Plan 1A – Pre-mining Environment – Project Locality 11 Plan 1B – Pre-mining Environment – Natural Environment 11 Plan 1C – Pre-mining Environment – Built Environment 11 Plan 2 – Mine Domains at Commencement of MOP 11 Plan 3A – Mining and Rehabilitation – End Year 1 MOP 11 Plan 3B – Mining and Rehabilitation – End Year 6 11 Plan 3C – Mining and Rehabilitation – End of MOP 11 Plan 4 – Final Rehabilitation and Post-mining Land Use 11 Plan 5 - Rehabilitation and Post-mining Land Use Sections

1.2 HISTORY OF OPERATIONS The Peak Hill Gold Mine operated as a drill and blast open cut gold mine between 1996 and 2002. Gold was extracted using heap leach cyanide technology until 2005 - when the last gold was poured on 20 December 2005. Gold Production from the Peak Hill gold mine from October 1996 to December 2005 was 153,657 fine ounces.

1.3 CURRENT CONSENTS, AUTHORISATIONS AND LICENSES Table 2 presents the consents, authorisations and licences held in relation to the Mine. MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Table 2

Current Consents, Authorisations and Licenses Page 1 of 2

Number Granted by Grant Date Expiry Date Purpose Development Consent 3 September Development Consent – Open Cut Gold DA 648/93 Parkes Shire Council NA 1993 Mine and heap leach gold extraction plant 16 August Modification of Development Consent DA 648/93 Parkes Shire Council 1994 (Parkers Extension) DA 1033/97 Parkes Shire Council 15 July 1997 NA Extension of Processing Operations 5 August DA 1049/97 Parkes Shire Council Garth Bore Pipeline 1997 6 February DA 1080/97 Parkes Shire Council Main Tailings 1998 20 April DA 99253 Parkes Shire Council Great Eastern 2000 8 December DA 00174 Bobby Burns Pit 2000 20 June DA 01072 Parkes Shire Council Parkers Cutback 2001 20 DA 01162 November Crown Pit 2001 Special 27 February Purpose Mineral Resources Permit to Conduct Tourist Activities 2003 Conditions Mineral Authorities ML1684 11 Feb 2013 11 Feb 2034 Mining activities at the Tomingley Gold Mine EL5675 17 Jan 2000 16 Jan 2014 EL5830 05 Apr 2001 04 Apr 2016 EL5942 03 May 02 May 2002 2015 Exploration Activities EL6085 20 May 20 May 2003 2015 EL6319 12 Oct 2004 11 Oct 2012 Minister for Mineral GL5884 Resources 12 Dec 1969 17 Jan 2022 ML1351 15 Jun 1994 17 Jan 2022 ML1364 14 Mar 1995 17 Jan 2022 ML1479 18 Jan 2001 17 Jan 2022 Mining activities at the Peak Hill Gold ML6036 07 Mar 1968 17 Jan 2022 Mine ML6042 21 Feb 1968 17 Jan 2022 ML6277 12 Mar 1971 17 Jan 2022 ML6310 27 Aug 1971 17 Jan 2022 ML6389 06 Apr 1973 17 Jan 2022 MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Table 2 (Cont’d)

Current Consents, Authorisations and Licenses

Number Granted by Grant Date Expiry Date Purpose ML6406 25 Jan 1974 17 Jan 2022 Licences - Environmental Regulation of noise, dust and water Environment 5 September Renewed EPL5473 emissions from the Mine Site (provided as Protection Authority 1999 annually Appendix 4). Environment 7 November NA Notice of Variation of Licence EPL5473 Protection Authority 2003 Environment 28 January Licence varied by correction to DECCW EPL 5473 NA Protection Authority 2011 region record Environment 17 June EPL 5473 NA Licence variation 1505946 Protection Authority 2014 Licence Trade & Investment – 23 Feb 2010 NA Licence for pipeline and pump site 451536 Crown Lands 300ML Water Access Licence – Bogan WAL 28643 NSW Office of Water 1993 NA Weir Source: Alkane Resources Ltd

1.4 LAND OWNERSHIP AND LAND USE Plan 1A provides an aerial photo of the Mine Site and its surrounds. Land uses within and surrounding the Mine Site includes the following: • Urban residential and rural residential; • Agriculture; • Transportation (Newell Highway); • Water Supply Infrastructure on Peak Hill, Reservoir access road, communications towers, rising and gravity water mains; • Peak Hill Solid Waste Depot off Roose Road; • Commercial main street of Peak Hill; • Recreation (Open Cut Experience - Tourist Mine); • Former mining operations - namely Crown workings and alluvial mine shafts; and • Bushland owned by Peak Hill Local Aboriginal Lands Council MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

1.5 STAKEHOLDER CONSULTATION 1.5.1 Community Consultation Consultation was undertaken with the local community, indigenous representatives (Peak Hill Aboriginal Community Working Party) and relevant government agencies throughout the operating life of the Peak Hill Gold Mine and during mine closure planning. Establishing a tourist mine, post mine closure was a voluntary commitment made by Alkane Resources as a demonstration of its commitment to sustainable development. The community has been keen to have continued access to the mining leases on the hill post mine closure.

1.5.2 Government Agency Consultation The following government agencies were consulted during the preparation of this MOP. • Environment Protection Authority. • Parkes Shire Council. In addition, a final draft version of this document was provided to the Division of Resources and Energy and comments received were taken into account when finalising the document.

2. PROPOSED MINING ACTI VITIES 2.1 PROJECT DESCRIPTION The Peak Hill Gold Mine includes the following components (Figure 1). • Mine site access road (off Roose Road). • 3 bedroom transportable house with carport. • Mine site office, crib room, laboratory (transportable) and steel shed (slab floor). • Core shed, sea container (exploration access and continuing use). • 5 HDPE lined ponds (await re-use or final rehabilitation). • Rehabilitated Final Landforms (waste rock emplacement, heap leach and ROM Pad). • Open cut voids (fenced): – Proprietary and Parkers Open Cut (including Parkers Cut Back); – Great Eastern Open Cut; – Crown Open Cut; – Bobby Burns Open Cut (partially back filled); and – Historic (1890-1915) Crown Workings and alluvial workings (fenced). • Bobby Burns to Proprietary Haul Road (fire break). • Buried water pipeline from “Westray”, the Bogan Weir and Peak Hill Sewage Treatment Works. MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

• A transformer and electrical distribution network within the Mine Site. • Grassed waterways and sediment ponds in the northeast and northwest corners of the mine site. • 3 Groundwater monitoring bores around the north eastern perimeter of the mine site. • Viewing platform and 22 interpretive signs around the Open Cut Experience. Table 3 below details the domains within the Mine Site, their size and major assets contained. Note that the areas detailed are based on maximum disturbance within the term of the MOP. A detailed description of each domain is provided in Section 5.1.

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Figure 1: Site Layout A3/colour

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Table 3

Major Assets per Domain

Domain Size Assets Use & Details (approx. ha) 1 - Infrastructure Area 8.5 Roads: site access. Roads provide access to Buildings: Including site office, house, open cuts, site entry and crib room and amenities. inspection to site areas. Processing: Including lab, shed, wet Buildings still in use and plant slab and man-proof fencing maintained. Wet plant structures removed from site in 2010 and only slab

remains.

Contain rain water only 5 HDPE-lined ponds (processing and which evaporates during overflow) the year

2 – Residue 24.2 5Mt of heap and dump leach (spent ore) Rehabilitated as a final contoured to direct runoff to a landform downslope rock-lined flume. Includes 0.6Ha dump leach trial area The crushed ore in the heap leach does have some commercial value as construction material. RMS used spent heap leach material for shoulder widening on Newell Highway in 1999 3 - Water Management 1.5 Includes two sedimentation ponds, dam Table drains and grassed Area near contractors area and grassed table waterways are for drains and waterways management of rainfall run-off 4 - Overburden 27.0 5 Mt on waste rock including 815,000 Shaped and rehabilitated Emplacement Area tonnes of sulphidic material (>1 g Au/t) WRE has maximum (Waste Rock which is encapsulated in oxide waste height of 25m and heap Emplacement and ROM rock (<0.5g Au/t). leach has a maximum pad) Includes 4.5Ha Rom pad constructed height of 20m from oxidised waste rock 5 - Stockpiled Material 0.7 Top soil stockpile south of overflow Temporarily pond rehabilitated with pasture 6 - Void (Open Cut) 14.6 Includes four voids at the end of the Part of tourist mine MOP period. attractions 7 - Rehabilitation Area – 1.3 During the MOP period no areas will be Biodiversity asset Pasture rehabilitated to pasture 8 - Underground Mining 0 Underground mining was not part of this N/A Area (SMP) development 9 - Conservation & 76 There was no biodiversity offset Tourist Mine Biodiversity Area required for this mine site. However, it should be noted that biodiversity has increased as result of the PHGM. 10 - Rural Land 47 Areas largely undisturbed by mining Biodiversity and (49Ha) Grazing licence as part of “Little Agriculture (grazing) Oakleigh” Lease (8 Ha)

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Note: The WRE extends across 2.65Ha of Lot 326 which was used as a solid waste Depot by Parkes Shire Council. This land will ultimately be replaced by 4Ha subdivided off Lot 380 which is owned by Alkane Resources Ltd. Source: Alkane Resources Ltd

2.2 ACTIVITIES OVER THE MOP TERM 2.2.1 Exploration Exploration activity will continue during this MOP period. Exploration personnel will continue to access the core yard and site offices as part of their normal activities. The Peak Hill Gold Mine MLs contain a known sulphide resource totalling 4.91Mt grading at 2.05g/t Au and 0.17%Cu (1.0g/t Au cut off). Exploration activities may include the following: • Geochemical sampling; • Geological mapping; • Geophysics; and • Diamond and Reverse Circulation drilling. The objective of the exploration program will be to further define the known resource, as well as identify additional resources within the Mine Site. Environmental management of exploration activities will continue to be implemented to ensure the final rehabilitation of the exploration areas is consistent with the rehabilitation objectives identified in Section 5.2 of this document. Finally, reporting of the environmental performance of the exploration activities will be included within the Mine’s AEMR. Technical reporting of exploration activities will be undertaken in accordance with the requirements of the document Exploration reporting: A guide for reporting on exploration and prospecting in New South Wales published by Industry and Investment NSW – Minerals and Energy in October 2010.

2.2.2 Construction No construction is planned for the MOP period. Mining Operations (Including Mining Purposes) No mining will be undertaken on the PHGM MLs during this MOP period. There are no plans to disturb previously rehabilitated areas during the MOP period other than the removal of the remaining topsoil stockpile.

2.2.3 Rock/Overburden Emplacement 2.2.3.1 Introduction All areas that were used as waste rock emplacements (WRE) have been shaped and rehabilitated as final landforms. For the purposes of this MOP waste rock emplacements include the WRE and ROM Pad (constructed from oxidised waste rock).

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2.2.3.2 Waste Rock Emplacement Area Design Criteria and Status Approximately 10 million tonnes of rock were mined at PHGM between 1996 and 2002. Approximately 5 million tonnes were classified as oxide ore and sent to leach pads for heap (>0.75g/t Au) or dump leaching (0.5g/t Au-0.75g/t Au). The WRE at PHGM contains 4,035,110t of oxidised waste rock and 815,059t of sulphidic waste rock. The sulphidic material has been encapsulated under 1.5m cap of inert and low permeability oxide material. The top of the WRE has been shaped with a 1:200 slope to a concrete downslope flume (designed and constructed by SoilWorks in 2002). Some sulphidic waste from active mining areas was used in October 2002 to partially backfill the Proprietary Pit from a tip head on the main ramp. This back-fill has assisted in stabilising a zone of pit wall weakness on the western edge of the Proprietary pit. Waste rock from the Crown Pit was used to partially back-fill the Bobby Burns Pit to reduce depth of the final void against the Reservoir Access Road and to minimise waste movement. Table 4 presents the indicative design criteria for WRE and indicative status at end of this MOP. Table 4

Indicative Waste Rock Emplacement Design Criteria

Waste Rock ROM Emplacement Design Criteria End End Design of Design of MOP MOP Area (ha) 22.7 22.7 4.5 4.5 Maximum height (m) 21.5 21.5 10 10 Lift heights (m) 10 10 10 10 Number of lifts 2 2 1 1 Berm widths (m) 5 5 5 5 Batter Slope (V:H) 1:3 1:3 1:3 1:3 Volume (million m3) ? ? ? ?

2.2.3.3 Waste Rock Characteristics The acid generating potential of sulphidic material at PHGM is very high and for that reason great care was taken during the handling and disposal of 815,059t of sulphidic waste rock in the WRE. The sulphidic material has been encapsulated under 1.5m cap of inert and low permeability oxide material. The top of the WRE has been shaped with a 1:200 slope to a concrete downslope flume (designed and constructed by SoilWorks in 2002).

2.2.3.4 Waste Rock Emplacement Methods The excavated waste rock was paddock dumped by a fleet of 773B dump trucks within the approved emplacement area before being shaped and profiled by bulldozer. Each emplacement was progressively lifted in 10m vertical increments with a batter slope of 18º created for each lift. A final face angle of each lift of 1:3 (V:H) was shaped with a D7H bulldozer. Between each lift,

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a 5m wide berm with a 1:20 (V:H) or 5% back slope and a 1:200 (V:H) or 0.5% longitudinal grade was constructed. The WRE was compacted during construction by heavy vehicles travelling over its surface. Rehab was progressed incrementally (each year) of the 1:3 batters. Vegetative cover was established on 20cm of topsoil and a pasture mix of introduced and native perennial and annual species.

2.2.4 Processing Residues 2.2.4.1 Design Criteria and Status For the purpose of this MOP the heap and dump leach are considered as processing residues as this landform is different in nature to the WRE. The processing residue is effectively spent ore (rather than tailings). Key features of the Heap and Dump Leach include the following: • Area – 24 Ha; • 2 lifts of 10m height each; • Pad construction included topsoil removal, scarification and stick picking before compaction with vibrating roller to achieve <10-7 infiltration; • 300m x 180m pad areas lined with welded 1.0mm thick HDPE; • Leak detection system under pads reporting to sumps; • Final batter design during rehabilitation 1:3 (V:H); • Clay capped top of the final landform; and • Waterways and berms delivering rainfall runoff to geotextile (Bidim A34) and basalt (240mm (D50)) rock-lined flume.

2.2.4.2 Residue Transfer Method Crushed and agglomerated ore was stacked using a pad conveyor and radial stacker in 2 x 10m lifts in modules. Heap leach operations recycle cyanide solution though pumps and poly pipe from the process ponds through the heap leach material. Ultimately the ‘waste residue’ is spent ore (crushed to 7mm) or else dump leach material (50 micron-50cm diameter). Cyanide additions to the process solutions at PHGM ceased 9 July 2004. Processing solution with diminishing amounts of cyanide solution were recycled through until the levels of WAD cyanide were below 10ppm. By October 2005 return solution from the heap leach broadly met livestock drinking water quality.

2.2.5 Waste Management In most cases non-production waste generated across the MOP period will be collected on site and removed for disposal or recycling by a suitably qualified contractor. Table 5 presents an

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

estimate of the non-production waste and briefly describes how each class of waste is stored and subsequently removed from site. Table 5

Non-Production Waste Management

Waste Type Storage / Management Removal / Disposal General waste (including Covered bins or skips located within lunch Site supervisor takes waste products food scraps) rooms, offices, outside workshops and to Peak Hill Solid Waste Depot. elsewhere as required. Where these bins are located in open areas they are fitted with animal proof lids. General Recyclables Covered bins or skips located within lunch Site supervisor takes waste products rooms, offices, outside workshops and to Peak Hill Solid Waste Depot. elsewhere as required. Where these bins are located in open areas they are fitted with animal proof lids. Waste Oils & Greases There is one Ford 500 tractor and one light Collected on an occasional basis by vehicle on the mine site so there are very a licensed contractor and transported few waste oils produced. to an appropriately licensed facility for recycling. Batteries Placed within a covered and marked used Collected on a regular basis by a battery storage area until removed from licensed contractor and transported site. to an appropriately licensed facility for recycling. Tyres Placed within a marked used tyre storage Tyres are taken to Peak Hill Solid area until removed from site or used for Waste Depot. another purpose. Scrap Metal Stored in a specified area within the Collected on a regular basis by a workshop area or elsewhere as required. scrap metal recycler. Waste Water Treated in the onsite septic system Contractor (Septic Sam) on as needs attached the house basis

2.2.6 Decommissioning and Demolition Activities There are no areas or permanent structures expected to be decommissioned or demolished until 2021 (during the MOP period). The decommissioning of the HDPE lined process ponds is scheduled for 2021.

2.2.7 Temporary Stabilisation It is expected that only one soil stockpile will require temporary stabilisation during the MOP period. The one remaining soil stockpile on site located south of the large overflow pond has had a good pasture cover on it since 2005.

2.2.8 Progressive Rehabilitation and Completion During the MOP term progressive rehabilitation will occur. There are three areas on the ML that contain approximately 100 tonnes of sulphidic waste rock that will be removed to the base of Gilligan’s Island in the Proprietary pit. An excavator and tipper truck will be required to mobilise to site for this task.

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Agricultural limesone at approximately 2.5tonne/Ha will be applied and fresh topsoil (20cm depth) will be applied to the three affected areas: • Southern edge of ROM pad; • Trial dump leach site; and • 25m of bund on the eastern edge of the Haul Road to the Proprietary Pit. This work is scheduled for completion in the 2015-2016 financial year. Final rehabilitation of the ML will include the following tasks provided that a decision to develop the sulphide resource at Peak Hill is not made by the end of 2021: • Removal of concrete slabs associated with wet plant and processing ponds; • Removal of HDPE liner in ponds and rehabilitation of processing and overflow ponds; and • Burial of poly and PVC pipe in the void of the processing ponds. These three infrastructure residues are proposed to be buried in one or more of the processing pond voids (pending EPA approval) or otherwise will need to be transported off site to a suitable waste disposal facility. In 2021 it is proposed that the processing ponds, which are excavated into clay subsoil, be re- shaped, compacted over buried concrete, HDPE and PVC and poly pipe and left as ephemeral wetlands as this would further increase habitat diversity across the MLs. Empheral wetlands like most water sources in a temperature landscape are known as biodiversity hotspots. The timing of these phases is discussed in Section 5.3, with further details of the activities discussed in Section 7.2.

2.2.9 Material Production Schedule during MOP Term There is no material production scheduled for the term of the MOP.

3. ENVIRONMENTAL ISSUES MANAGEMENT 3.1 ENVIRONMENTAL RISK ASSESSMENT An Environmental Risk Assessment was conducted as part of the Peak Hill Gold Mine Environmental Impact Assessment process. The Peak Hill Gold Mine operated within an Environmental Management System which was prepared in house and included in Peak Hill Gold Mine MREMP 1997 and Annual Report 1996. Many of the specific risks detailed in MREMPs during mining operations no longer exist as there is no active mining activity on the mine site. Notwithstanding the above, the Company has undertaken a further risk assessment focusing on rehabilitation-specific risks. That assessment has also been undertaken generally in accordance with AS/NZS ISO 31000:2009 Risk Management - Principles & Guidelines. Tables 6, 7 and 8 present the consequence, likelihood and risk rating used during this analysis. Table 9 presents the results of the risk analysis assuming that industry minimum standard mitigation measures only are implemented.

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Table 6

Qualitative Consequence Rating Level Descriptor Description

1 Negligible No detrimental impact on the environment is measurable or envisaged.

An event which could have temporary and minor effects on the environment, 2 Minor such as a non-reportable environment incident.

An event which would create substantial temporary or minor permanent 3 Moderate damage to the environment, such as a reportable incident not likely to result in prosecution.

An event which could have a substantial and permanent consequence to the 4 Major environment such as an environmental incident which would result in prosecution, adverse local publicity and community complaints.

A major event which could cause severe damage to the environment with actual or potential loss of credibility with key stakeholders, environmental 5 Severe liability, regulatory intervention, national publicity/complaints, or could close the operation prematurely.

Note: Rating modified after AS/NZS ISO31000:2009 Risk Management - Principles & Guidelines

Table 7

Qualitative Likelihood Rating

Level Descriptor Description Indicative Frequency

Once a year or more A Almost Certain Is expected to occur in most circumstances frequently

Once every three B Likely Will probably occur in most circumstances years

C Possible Might occur at some time Once every ten years

Once every thirty D Unlikely Could occur at some time years

Once every 100 years E Rare May occur only in exceptional circumstances

Note: Rating modified after AS/NZS ISO31000:2009 Risk Management - Principles & Guidelines

Table 8

Qualitative Risk Rating Consequences

Likelihood Minor Moderate Major Negligible 1 2 3 4 Severe 5

A (Almost Certain) M H H VH VH

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

B (Likely) M M H H VH

C (Possible) L M H H H

D (Unlikely) L L M M H

E (Rare) L L M M H

Note: Rating modified after AS/NZS ISO31000:2009 Risk Management - Principles & Guidelines

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Table 9

Key Rehabilitation-related Risks during the MOP Term

Issue

vities

ce of roads,

track and equipment

preparation, vegetation

Exploration Land and topsoilstripping demolition All activities including earthmoving / Use maintena fences, Hazardous materials and fuel, handling spills / management Sewerage Rubbishdisposal Rehabilitationacti Rehabilitated land and remaining features air pollution, dust / other L(2D) L(2D) L(2D) L(2D) L(1E) L(1E) L(1E) L(2D) L(2E)

erosion / sediment L(1E) L(1C) L(2D) L(1D) L(1E) L(1E) - L(2D) L(2E) minimisation surface water pollution L(1E) L(2D) L(2D) L(1D) L(1E) L(1E) - L(2D) L(2E) ground water pollution L(1D) - - - L(2D) L(2D) - - - contaminated or polluted land L(1E) - - - M(3D) L(2D) L(1E) - - threatened flora protection L(1E) M(3D) - - - - - L(2D) L(2D) threatened fauna protection L(1E) L(2D) - - - - - L(2D) L(2D) weed control and management L(1E) L(1E) - - - - - M(2B) M(2B) operational noise M(2C) M(2C) L(2D) L(1E) - - - L(2D) L(2D) vibration and air blast ------visual amenity, stray light L(2D) L(2D) L(2E) L(1E) - - - L(1C) L(1C) aboriginal heritage L(2D) - - L(2D) - - - - L(1E) Non- Aboriginal heritage - L(2D) - L(1D) - - - L(2D) L(1E) bushfire L(2E) L(2E) - - - - - L(2E) L(2E) mine subsidence/pit wall - - M(2B) - - - - M(2C) L(1E) failure hydrocarbon contamination L(2D) L(2D) L(2D) L(2D) L(2D) - L(2D) L(2D) L(2D) public safety L(1E) L(2E) L(2E) - L(2E) - - L(2E) H(4C)

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3.2 ENVIRONMENTAL RISK MANAGEMENT 3.2.1 Specific Risks relating to Rehabilitation Geology and geochemistry The geochemical characteristics of the wastes, including residue from ore, were assessed as part of the Environmental Impact Assessment for the project. In particular, the wastes were assessed for their net acid generation potential as when rock material containing naturally occurring sulphide materials is exposed to oxygen, the sulphide materials can oxidise to form a low pH or acidic leachate. That test work determined the following: • Oxidised material within the Mine Site is non-acid forming; and • Primary or non-oxidised material within the open cuts contains concentrations of sulphide material which is potentially acid forming. The sulphides encapsulated in the WRE are not acid forming while they are kept dry.

Erosion and sediment control An Erosion and Sediment Control Plan (Hoynes, Wheeler & Thorne 1995) was implemented during the construction of the mine site. The northeast and northwest sediment ponds are permanent structures which receive waters from permanent grassed water ways and table drains. Both pond perimeters were planted in 1996 with tree species commonly found in local riparian environments. Those plantings are now regenerating/recruiting new trees. The northeast sediment pond contains a deep section of semi-permanent water and a larger area that is periodically inundated. A former farm dam north of the contractors shed acts as a sediment basin receiving waters that are shed from the WRE. Soil type(s) and suitability Soils in the Peak Hill area include Sodosols and Dermasols. Sodosols have an abrupt increase of clay down the profile and high sodium content which may lead to soil dispersion and instability (northeast sediment pond). The soils across the final landforms are Anthroposols (soil parent materials have been made or altered by human action). Soil across the ML fall in two types; • Gravelly loam over red gravelly clays (on the hill). Highly disturbed by mining and processing operations 1889-1917 and exploration in the 1980’s, and • Gravelly red/brown loam over gravelly red/yellow mottled clays (Lot 380). Disturbed by agriculture (cropping and soil conservation works up until 1996). Disturbed by mining and topsoil stripping and stockpiling. Both soil types have proven to be suitable to rehabilitation with pasture species and woody vegetation. Graminus Consulting has commenced soil sampling as part of Landscape Function Analysis reporting (Aug & Oct 2013 and May 2014).

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Flora & Fauna Biodiversity across the MLs has increased significantly since 1996. Prior to 1995 the mine site (Lot 380) was cleared of all but a individual paddock trees. Conventional tillage and cropping took the place of a fromer Grey Box Woodland for decades prior to mining activity recommencing. Stubble burning and grazing of livestock had weakened some of the remnant Gey Box, Wilga and White Cypress Pine Trees. Approximately 53 trees were cleared across Lot 380 for mining but many hundreds of trees were planted as replacements. Those trees are now recruiting new generations naturally. Woodland and grassland bird species White Winged Choughs, Thornbills, and double barred finches are known to now nest or at least frequently feed on Lot 380. Two macropods (Red Necked Wallaby and Wallaroo) are now common on Lot 380 where they did not exist in 1995. Several actions which have led to an increase in biodiversity value across the ML: • Hard rubbish removal; • Weed control (particularly African Boxthorn); • Screen plantings of local tree and shrub species (much of the seed was local provenance collected from “Genaren”, Peak Hill; • Exclusion of livestock allowed natural regeneration of trees and shrubs; • Exclusion of people and dogs from MLs has allowed two additional species of macropods to colonise the leases; • Diversity of landform (rocky cliffs, wetlands, permanent pastures, exposure of old workings (tunnels), woodlands; • Birds are nesting in rehabilitation plantings; and • Echidnas have returned to the ML after at least 10 years absence. Public Safety There will be a residual risk to public safety through unauthorised access to voids. Man-proof fencing is cut or vandalised from time to time by trespassers. Trespassers expose themselves to the risk of falling into a void. Other Risks Ongoing risks remain with the need to control of noxious weeds and pest animal populations. Macropod population can impact negatively on landform stability.

4. POST MINING LAND USE 4.1 REGULARTORY REQUIREMENTS Regulatory requirements specifically affecting the progress towards the post mining land use are detailed in Table 10.

4.2 POST MINING LAND USE GOAL The nominated post mining land use goals for the Mine are:

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• to implement successful design and rehabilitation of landforms to ensure structural stability, revegetation success and containment of wastes; • to ensure rehabilitation and revegetation is self-sustaining; and • to retain areas of the Mine Site amenable to future mining or tourist activities.

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Table 10

Regulatory Requirements for Rehabilitation

Source Document Subject Rehabilitation Objective

Mining Lease General Any disturbance as a result of activities under this lease must be rehabilitated to the satisfaction of the Director General. Rehabilitation Security Provide and maintain a security deposit. Safety All shafts and excavations are to be appropriately protected (Condition 11). Rehabilitation Rehabilitate all areas disturbed by operations (Condition 16). Environmental Impact Provenance Trees and shrub species for rehab from locally sourced seed (EIS pg. 101). Assessment (RWC Final Landform and Land Rehabilitation of final land forms and land use as per Section 2.13 of the EIS. 1993) Use Revegetation Enhance aesthetic value of existing vegetation communities through weed control and supplementary planting (EIS pg. 49). Revegetation with native tree and shrub species and/or pasture species comparable with pre-existing vegetation communities Soil Management Follow the procedures for Soil Stripping and Stockpile Management detailed in Section 2.4.3 of the EIS. Development Consent General Provide a minimum of 4Ha to PSC for Waste Disposal Purposes (Condition 1.25). (Parkes Shire Council) Water Supply Transfer ownership of pipeline system and pumping facilities and licences to Parkes Shire Council (Condition 10.2). Visual Amenity Provide screening of mining operations and associated activities (EIS pg. 101). Progressively reshape and rehabilitate areas, including waste rock emplacements, no longer required for mining related purposes. Draft Mine Closure Heritage Open Cut Experience – tourist potential to be developed by Council led committee (Pg. 12). Plan (Alkane 2002) Final Landuse Some form of covenant required to protect ML for conservation and heritage values (Pg. 15). Infrastructure Office residence and core yard to be removed and hard stand ripped and rehabilitated (Pg. 15). Mineral resources Future use for mining should not be overlooked in long term planning (Pg. 17).

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4.3 REHABILITATION OBJECTIVES In order to achieve the nominated post mining land use goals, the objectives of rehabilitation activities are as presented in Table 11. Table 11

Rehabilitation Objectives

Feature Objective Target Land Use Provide for a combination of light industrial / Rehabilitate site in accordance with commercial and biodiversity conservation. Plan 4. Continue to consult on the post-mining land use with the community and Minimise adverse socio-economic outcomes government agencies. Rehabilitate site following mine closure. in accordance with Plan 4, unless otherwise agreed. Landform Provide a low maintenance, geotechnical stable Landscape Function Analysis and safe, non-polluting landform which blends monitoring results show the landform with surrounding landforms (ie. is not an eyesore) ecosystem is stable. and provides land suitable for the proposed final land use. Construct the final landform such that it is self- Rehabilitate site in accordance with sustaining, i.e. has maintenance requirements Plan 4. consistent with the agreed post mining land use(s). Provide rehabilitated woodland communities Monitoring to confirm that woodland which adjoin conserved and improved native vegetation is contiguous. vegetation remnants to create a contiguous corridor of grassy woodland vegetation across the mine site. Biodiversity Already outperformed. Biodiversity of Maintain or improve the species diversity and the mine site has increased steadily habitat value of the Mining Lease. since 1996. Surface Decommission and remove all surface All surface infrastructure removed Infrastructure infrastructure (unless required for a lawful post (unless required for a lawful post mining land use). mining land use). Final Voids Construct a safety bund around all open Ensure all final voids are safe, stable and secure. cut and install a man-proof fence and lockable gates. Potential tourist mine. Other Allow for the relinquishment of the Mining Lease By 17 January 2022 unless another and the return of the security lodged over the mine development is underway. Mining Lease within a reasonable time after the end of the mine life.

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5. REHABILITATION PLANN I N G A N D MANAGEMENT 5.1 DOMAIN SELECTION 5.1.1 Introduction A domain is a land management unit within the Mine Site. For the purposes of this MOP, the Mine Site domains comprise primary and secondary domains as follows. 1. Primary or operational domains - categorised on the basis of mining-related activities occurring within each domain. 2. Secondary or post-mining land use domains - categorised on the basis of similar post-mining land use objectives and rehabilitation outcomes. Table 8 identifies the domains defined for the Mine and used throughout this MOP Table 12

Primary and Secondary MOP Domains

Code Primary Domains (operational) Code Secondary Domains (Post Mining Land Use) 1 Infrastructure Area A Infrastructure 2 Residue Storage Facility B Water Management Area 3 Water Management Area C Rehabilitation Area – Grassland 4 Overburden Emplacement Area D Rehabilitation Area – Pasture 5 Stockpiled Material E Rehabilitation Area - Woodland 6 Void (Open cut void) F Rehabilitation Area – Forest 7 Rehabilitation Area – Pasture G Rehabilitation Area – Rural Land Capability Classification I to VIII 8 Underground Mining Area (SMP) H Relinquished Lands 9 Conservation and Biodiversity Offset Area I Final Void (essentially undisturbed by recent mining activities) 10 Rural Land (essentially undisturbed by J Conservation and Biodiversity Offset Area recent mining activities)

Plan 2 presents the status of the rehabilitation domains at MOP commencement and Plans 3A to 3C show the status at the end of each year throughout the MOP term. The following subsections provide a description of each of the domains.

5.1.2 Primary Domains 5.1.2.1 Domain 1 – Infrastructure Areas This domain includes: • the man-proof fencing, processing plant slab, 5 HDPE-lined ponds, laboratory, shed, core yard, site office and car port, crib hut and house; and • those sections of the following that are within the Mine Site: – main site access road;

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– water supply infrastructure; – power infrastructure; and – internal roads. The processing plant slab and 5 HDPE-lined ponds will remain as part of this Domain until 2021. It is proposed that the other infrastructure remain permanently on site.

5.1.2.2 Domain 2 – Residue Storage Facility This domain is limited to the footprint of the heap leach pads which has been shaped and rehabilitated, including the embankments and water management structures.

5.1.2.3 Domain 3 – Water Management Areas This domain is limited to water management structures (northeast and northwest sediment ponds and small dam below contractor’s area), waterways and table drains which receive water from mine site.

5.1.2.4 Domain 4 – Waste Rock Emplacements This domain is limited to the Waste Rock Emplacement and ROM Pad.

5.1.2.5 Domain 5 – Stockpiled Material This domain is limited to the one remaining soil stockpile on the mine site.

5.1.2.6 Domain 6 – Open Cut Voids This domain is limited to the open cut voids (Proprietary, Parkers, Parkers Cut Back, Great Eastern, Crown and Bobby Burns pits) as well as the historic Crown workings (slot stopes open to surface).

5.1.2.7 Domain 7 – Rehabilitation Area This domain is limited to sections of the Mine Site that are adjacent to active sections of the Mine Site but would not be directly disturbed.

5.1.2.8 Domain 9 – Conservation and Biodiversity Offset Areas This domain includes areas outside of the disturbance footprint on the hill (including parts of the Tourist Mine) as well as areas not disturbed by mining activity 1996-2005.

5.1.2.9 Domain 10 – Rural Lands This domain is limited to an area on the south-eastern corner of the Mining Lease which is grazed under licence as part of the Alkane owned property, “Little Oakleigh”. Parts of Lot 380 that are largely undisturbed by recent mining are also included in this domain.

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5.1.3 Secondary Domains

5.1.3.1 Domain A – Infrastructure This domain includes infrastructure that potentially has some value for ongoing land use on the site • laboratory, shed, core yard, site office and car port, crib hut and house; and • those sections of the following that are within the Mine Site: – main site access road; – water supply infrastructure; – power infrastructure; and – internal roads.

5.1.3.2 Domain B – Water Management Areas This domain is limited to water management structures (northeast and northwest sediment ponds and small dam below contractor’s area) waterways and table drains which receive water from mine site.

5.1.3.3 Domain C – Rehabilitation Area – Grassland This domain includes those areas of the Mine Site that that have been rehabilitated to grassland. Shrubs and trees are gradually regenerating across the minesite where grazing pressure by macropods will allow. This domain includes: • The final landforms of the heap leach and WRE, part of the ROM pad, and an area west of the Proprietary pit which had historic mine tailings removed in 1998 to McPhail (3km south of Tomingley). The final landforms support a mixture of introduced and native, perennial and annual species of grasses and legumes. This species mix was introduced to the minesite progressively between 1996 and 2005. The reasoning behind this mix was to ensure that landform batters of 3:1 would stabilise as quickly as possible through a variety of groundcover species which could respond rainfall events throughout the year. This species mix was discussed through the MREMP process. None of these species are noxious weeds, though government agencies which once ussed and recommended these species particularly in soil conservation works along roadside and in paddocks have now moved away from using some of the species now established at the site.

5.1.3.4 Domain E – Rehabilitation Area –Woodland This domain includes those areas of the Mine Site that have been rehabilitated to a woodland consistent with the Tumbledown Gum/Currawang Community which grows on rocky rises such as Peak Hill. The western edge of the ROM Pad, floor of Bobby Burns and Parkers Cut back are examples of this regenerated woodland.

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

5.1.3.5 Domain G – Rehabilitation Area – Rural Land This domain contains part of the grazing property “Little Oakleigh” and the land that was essentially undisturbed by the mining activities on Lot 380. The landuse on Lot 380 immediately prior to the grant of development consent was cultivation for grain production. While some areas of the Mine Site that have been rehabilitated in a manner suitable for agricultural purposes, including grazing and cropping it is the Company’s view that the mine site is better suited for tourism and biodiversity values. Both the heap leach and WRE support a diverse and healthy cover of grasses and legumes however the 3:1 batters would be damaged by hard hoofed grazing animals and put the final landform at risk if it is not managed extremely conservatively.

5.1.3.6 Domain I – Final Voids This domain contains the open cut voids (Proprietary, Parker, Parkers Cut Back, Great Eastern, Crown and Bobby Burns’ pits) as well as the historic Crown workings (slot stopes open to surface). It should be noted that Parkers Cut Back and Bobby Burns voids have been part rehabilitated to support woodland plant communities (since 2002).

5.1.3.7 Domain J – Conservation and Biodiversity Areas This domain includes areas that are managed for their biodiversity and tourism value (Open Cut Experience – Tourist Mine).

5.2 REHABILITATION DOMAIN OBJECTIVES Table 12 presents the post mining rehabilitation objectives and Table 13 presents the rehabilitation domain objectives. These objectives have been used to develop the performance indicators and completion/relinquishment criteria presented in Section 6.

5.3 REHABILITATION PHASES Successful rehabilitation is best considered in terms of logical steps or phases. That is, the successful achievement of objectives for one phase is the precursor for progression to the next phase, and so on until all rehabilitation objectives and criteria are complete. The use of rehabilitation phases in this manner allows the progress of rehabilitation to be clearly managed and monitored. The rehabilitation hierarchy used in this MOP follows the guidance provided Explanatory Note 2(h) of ESG3, which references seven separate phases as follows. Phase 1: Active Area This domain includes infrastructure that potentially has some value for ongoing land use on the site • laboratory, shed, core yard, site office and car port, crib hut and house; and • those sections of the following that are within the Mine Site:

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

– main site access road; – water supply infrastructure; – power infrastructure; and – internal roads for use as fire breaks and/or firefighting access.

Phase 2: Decommissioning Decommissioning includes the cessation of infrastructure usage, its demolition and removal from the Mine Site or preparation for a supplementary post-mining land use. The order in which the decommissioning of the infrastructure occurs would be determined and agreed upon prior to mine closure. The site has largely been decommissioned (2005-2012) prior to this MOP. The only decommissioning planned during the term of this MOP will occur in 2021 in Primary Domain 1 –Infrastructure Area. The HDPE lined ponds and wet plant slab will be decommissioned and man-proof fences removed. Phase 3: Landform Establishment The landform establishment phase involves the earthworks required to construct and/or profile all or part of each domain as nominated in the Project Approval or this MOP. The constructed landform should be suitable for the proposed final land use and blend, as far as practicable with the adjacent topography (ie not be an eyesore). This stage would also include the construction of any drainage structures needed for the area. It should be noted that landform establishment (other than processing ponds) was completed in December 2005. The decommissioned processing ponds will be established in 2021 as a chain of ephemeral wetlands which will not discharge water. Because annual rainfall at Peak Hill is approximately 550 mm and annual evaporation is approximately 1700mm any rainwater water caught in a turkeys nest (process ponds) will ultimately evaporate or be used by the vegetation growing in them. The ponds will naturally wet and dry according to seasonal conditions. It is likely the ponds will contain Cumbungi and other wetland species which would attract Eastern long Necked Tortoise, a range of frog specie and wetland bird species (just as the sediment ponds have attracted numerous species of wetland birds (see species lists in MREMP documents for Peak Hill Gold Mine 1996-2002). Phase 4: Growth Medium Development The growth medium development phase involves the placement of weathered overburden, subsoil and topsoil on the final landform and preparation of the surface for revegetation. Soil preparation may include fertiliser or ameliorant application and ripping or scarifying the surface. This phase took place at the Peak Hill Gold Mine from 1996 to 2005 where sepaerately stockpiled subsoil and topsoil were used to progressively rehabilitate the final landforms. Approximately 20cm of subsoil and 20cm depth of topsoil were used in rehabilitation activities. The waste rock emplacement had 200kg/Ha of NPK fertilizer (Granulock 15) and ag lime 2500kg/Haapplied by superspreader at the time of spreading a mixture of pasture species (see MOP2003 and AEMR 2002).

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Table 13

Rehabilitation Domain Objectives Page 1 of 2

Primary Domain Secondary Domain Rehabilitation Objective 1 – Infrastructure Area A – Infrastructure • All infrastructure and services not suitable for a lawful final land use to be removed. • All roads and hardstand areas to be retained for a lawful final land use reduced in width or size to that suitable for final land use. • Domain safe and free from hazardous materials. • Remaining infrastructure suitable for a lawful final land use. 2 – Residue Storage C – Grassland • Infrastructure removed and domain made safe. Facility (Heap Leach) • Free draining, stable and permanent landform established. • Soils, hydrology, and grassland ecosystem with maintenance needs no greater than those of surrounding land. • Final landform non-polluting. • Vegetation dominated by grassland species. 3 – Water Management B – Water • Domain stable and non-polluting. Area Management Area 4 – Overburden C/E – Grassland • Stable and permanent landform established. Emplacement Area • Soils, hydrology, and grassland ecosystem with maintenance needs no greater than those of surrounding land. • Final landform non-polluting. • Vegetation dominated by grassland species. • Upper slope of ROM pad established as a Tumbledown Gum/Currawang community.

R. W. CORKERY & CO. PTY. LIMITED 36

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Table 13 (Cont’d)

Rehabilitation Domain Objectives Page 2 of 2

Primary Domain Secondary Domain Rehabilitation Objective 5 – Stockpiled Material C – Grassland • Land capability similar to existing land capability. 6 – Open Cut Voids I – Final Void • Final landform safe, stable and secure. • Access to perimeter fences by formed tourist trails. • Habitat for birds and bats. • Batters softened (visually) by natural regeneration of Ironbark and Tumbledown Gum/Currawang growing on berms. 7 – Rehabilitated Areas C – Grassland • Land capability similar to existing land capability. 9 – Conservation and J – Conservation and • Maximise preservation of remnant Tumbledown Gum/Currawang Community. Biodiversity Offset Biodiversity Offset • Preserve maximum amount of remnant vegetation. Areas Areas • Minimal pest plant species. • Tourism activities (under Tourist Mine Permit issued by Minister). 10 – Rural Land G – Rural Land • Land capability similar to existing land capability.

R. W. CORKERY & CO. PTY. LIMITED 37

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Phase 5: Ecosystem and Land Use Establishment The ecosystem and land use establishment phase involved the establishment and maintenance of vegetation on the completed landform (1996-2005). On completion of ecosystem and land use establishment for a final land use of nature conservation/native vegetation on the constructed landform, an initial cover of native and introduced ground cover (grasses and legumes) was established. Future revegetation will comprise seeding with a native wetland species in the area of the former process and overflow ponds. Phase 6: Ecosystem and Land Use Sustainability The ecosystem and land use sustainability phase occurs once monitoring illustrates the achievement of relevant performance indicators with respect to ecosystem development. Areas of the landform may remain within this phase for extended periods whilst progress is made towards achieving completion criteria. Landscape Function Analysis by a suitably qualified person is the main monitoring tool that will be employed at the minesite to indicate a healthy functioning ecosystem. Phase 7: Land Relinquishment On achievement of the nominated closure criteria for the lease, the land will be relinquished and the rehabilitation security held by the DRE released in full for that component of the final landform. Table 8 provides a summary of the completed phases for the primary and secondary domains at the end of this MOP. Further detail on the proposed rehabilitation to be completed each year of the MOP is provided in Section 7.2. Section 7.3 and Table 14 provides further detail on the relative areas (by rehabilitation phase) of each domain completed over the term of this MOP.

6. PERFORMANCE INDICATO R S , A N D COMPLETIO N/RELINQUISHMENT CRI TERIA Performance indicators and completion criteria provide a means by which the progress of rehabilitation can be measured to quantitatively demonstrate the successful achievement of a biophysical process, i.e. the standards that are to be met by successful rehabilitation. Rehabilitation indicators and performance criteria are inter-related as a performance indicator is an attribute of the biophysical environment (e.g. pH, slope, topsoil depth) that can be used to approximate the progression of that biophysical process against a defined end point, i.e. the completion/relinquishment criterion. Table 15 provides the performance indicators and completion criteria developed for the Mine to achieve the nominated post mining land use goals and rehabilitation objectives (refer to Sections 4.2 and 4.3). The performance indicators also reference the Rehabilitation Domain Objectives identified in Section 5.2. Maps 3A to 3C present the annual progression of mining and rehabilitation activities throughout the term of the MOP.

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Table 14

Summary of Rehabilitation Phases proposed for Completion at the end of the MOP Rehabilitation Phase

ervation

Cons

Grassland (4C)

Areas Areas

Water management

–

Grassland (7C)

–

FinalVoid (6I)

RuralLand (5C)

Biodiversity (1J)

–

Infrastructure (1A)

Areas (9J) Areas

–

– –

Grassland (2C)

Ruralland (10G)

Grassland Woodland & (5C 5E) &

–

ervation and ervation Biodiversity

Infrastructure Infrastructure HeapLeach Water Management Area Area (3B) Waste Rock Emplacement ROM Pad SoilStockpiles OpenCut Voids Rehabilitated Areas Rural Land Cons and Biodiversity Active Area Decommissioning Landform Establishment Growth Medium

Development Ecosystem and Land

use Establishment Ecosystem and land

use Sustainability Relinquished Lands

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Table 15 Rehabilitation Performance Indicators and Completion Criteria Page 1 of 10

Progress at Expected TARP Justification/ Objective Performance Indicator Completion Criteria start of Completio Ref Source MOP n No. Phase 2 - Decommissioning Domain 1 – Infrastructure Area All infrastructure and Services disconnected Services not required for final land use Draft Mine 2021 services not suitable for a disconnected Closure Plan Commenced NA lawful final land use will be 2002 removed Infrastructure removed Infrastructure not required for final Draft Mine 2021 land use removed Closure Plan Commenced NA 2002 All roads and hardstand areas Roads not required for final land Complete removal of road Draft Mine 2021 to be retained for a lawful use are removed Closure Plan final land use reduced in 2002 Commenced NA width to that suitable for final land use. Roads required for final land use Road reduced in width to that suitable Draft Mine 2021 Not are reduced in width for final land use Closure Plan NA Commenced 2002 Hardstand areas reduced to size Hardstand areas reduced in size to that Draft Mine 2021 Not required for final land use suitable for final land use Closure Plan NA Commenced 2002 Domain safe and free from Contaminated land identified and Contaminated land assessment (soil MOP 2014 2021 Not hazardous materials remediated (Certified by testing) indicates contamination NA Commenced Contaminated Land Consultant) acceptable for final land use No hazardous materials remain All hazardous materials removed Draft Mine 2021 Not Closure Plan NA Commenced 2002

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Progress at Expected TARP Justification/ Objective Performance Indicator Completion Criteria start of Completio Ref Source MOP n No. Domain 2 - Residue Storage Facility – Heap Leach Draft Mine Closure Plan 2002 Infrastructure removed and All pipework and associated All pipework and associated Draft Mine NA domain made safe infrastructure removed infrastructure removed Closure Plan Completed 2005 2002 Landform demonstrates good Technical report is accepted by Draft Mine landscape functionality Mineral Resources and Energy Closure Plan Commenced 2015 NA 2002 Landform non-polluting Monitoring indicates any surface Draft Mine water runoff is non-polluting. Any Closure Plan leachate is below trigger values 2002 Commenced 2021 NA determined in accordance with ANZECC (2000) Relinquish EPL Domain 3 – Water Management Area Domain stable and non-polluting Water management structures are Water management structures long term stable are a permanent biodiversity Draft Mine asset (support native flora and Closure Plan Completed 2002 NA fauna that would not exist on 2002 site if these structures were not left in place) Domain 4 – Waste Rock Emplacement Stable and permanent landform Landform geotechnically stable Geotechnical report Draft Mine established (not eroding nor being infiltrated indicating no evidence of Closure Plan Completed 2015 NA by rainwater) instability of emplacements 2002 No acid mine drainage Encapsulated sulphides are Draft Mine long term stable Closure Plan Completed 2021 NA 2002 Domain 5C – Soil stockpiles

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Progress at Expected TARP Justification/ Objective Performance Indicator Completion Criteria start of Completio Ref Source MOP n No. Land capability similar to existing land Stockpiled soil used for Stockpiled soil removed and Draft Mine Not capability rehabilitation of other domains domain suitable for Closure Plan 2021 NA Commenced agriculture 2002

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Table 15 (Cont’d)

Rehabilitation Performance Indicators and Completion Criteria

Page 3 of 10

Phase 3 – Landform Establishment Domain 1 – Infrastructure Area Land capability meets land use needs Landform similar to pre-mining Infrastrucure is long term Partially (hardstand for buildings) Buildings left permanently on stable (no signs of ground MOP 2014 2021 NA complete site have secure foundations movement) Suitable surface water controls No identifiable erosion or installed and operating sedimentation MOP 2014 Completed 2005 NA effectively Domain 2 - Residue Storage Facility –

Heap Leach Free draining, stable and permanent Landform sheds surplus rainfall Monitoring indicates that Draft Mine landform established and does not generate any residue settling/dewatering is Closure Plan Completed 2005 NA leachate complete/reduced to an 2002 acceptable level Progress at Expected TARP Justification/ Objective Performance Indicator Completion Criteria start of Completio Ref Source MOP n No. Phase 3 – Landform Establishment (Cont’d) Domain 2 - Residue Storage Facility (Cont’d) Free draining, stable and permanent Landform supports a diverse and Minimal bare patches and LFA landform established (Cont’d) functioning grassland ecosystem >90% pasture cover – healthy consultant In progress 2021 NA functioning ecosystem report Facility re-profiled to be free Mapping confirms that the draining landform is free draining and Draft Mine no pooling of water on upper Completed 2005 NA Closure Plan surface of the facility is observed Suitable drop structures installed Designed and constructed by Draft Mine Completed 2005 NA (rock lined flume) SoilWorks 2005 Closure Plan

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Landform non-polluting Leachate (if present) of Monitoring indicates that Draft Mine acceptable quality residue leachate (if present) Closure Plan complies with trigger values Achieved 2005 NA for upland river systems determined in accordance with ANZECC (2000) Suitable surface water controls No identifiable erosion or Draft Mine installed and operating sedimentation Closure Plan Achieved 2006 NA effectively Domain 4 – Waste Rock Emplacement Stable and permanent landform Landform suitable for growth All slopes <18º Draft Mine Completed 2002 NA established media establishment Closure Plan Suitable surface water controls 1:200 fall across cap to Draft Mine installed and operating concrete flume (designed and Closure Plan Completed 2002 NA effectively constructed by SoilWorks in 2002) Diverse and well covered (with Healthy functioning LFA vegetation) landform ecosystem (based on LFA consultant’s In Progress 2021 NA indices for stability, nutrient report cycling and infiltration) Domain 4 - ROM Pad Stable and permanent landform Landform suitable for growth All slopes <18degrees Draft Mine Completed 2002 NA established media establishment Closure Plan Suitable surface water controls No identifiable erosion or Draft Mine installed and operating sedimentation Incomplete 2015 NA Closure Plan effectively Continued vehicular access Access for light vehicles maintained along western - Complete 2002 NA boundary of ROM pad

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Table 15 (Cont’d)

Rehabilitation Performance Indicators and Completion Criteria Page 5 of 10

TARP Justification/ Progress at Expected Objective Performance Indicator Completion Criteria Ref Source start of MOP Completion No. Phase 3 – Landform Establishment (Cont’d) Domain 5G – Soil Stockpile Land capability similar to pre-existing Landform suitable for growth No soil stockpiles remain on Draft Mine Not 2021 NA land capability. media establishment site Closure Plan Commenced Domain 1 J –Infrastructure – HDPE-

lined Processing Ponds Final landform safe, stable and secure Ponds wet and dry seasonally Wetland plant establishment Not MOP2014 2021 NA (following rain events) Commenced Phase 4 – Growth Medium Development Domain 1 J– Infrastructure Areas – Conservation and Biodiversity Soils, hydrology and wetland ecosystem Ephemeral wetland species Increase in numbers of with maintenance needs no greater than thriving in the depressions left reeds, cumbungi, waterbirds, Not MOP 2014 2022 NA those of surrounding land by ponds tortoises and frogs using this Commenced area

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Table 15 (Cont’d)

Rehabilitation Performance Indicators and Completion Criteria Page 6 of 10

TARP Justification/ Progress at Expected Objective Performance Indicator Completion Criteria Ref Source start of MOP Completion No. Phase 4 – Growth Medium Development (Cont’d) Domain 10G– Rehabilitation Area Pasture – Rural Land (Cont’d) Soils, hydrology and pasture ecosystem Key soil characteristics in the • pH – 5.3 to 7.0 with maintenance needs no greater than range of pre-mining soil • Electrical conductivity – those of surrounding land (Cont’d) characteristics for Red Dermosol 0.21 to 0.40dS/m. soils. • Cation exchange capacity Soil testing of 14 transects across – 4.9 to 7.1meq/100g heap leach, WRE and anologue • Dispersion index – 4 to 5 TGO Consent sites by Graminus gave a range Commenced 2015 NA Conditions of pH across the site of 4.1-7.1. • Phosphorus Colwell – 12 Two analogue site that have not to 48mg/kg been disturbed by any mining • Nitrate N – 4.3 to activity were pH 5.2 & 5.3 26mg/kg • Exchangeable Sodium % - 0.6 to 3.2% Suitable surface water controls • Monitoring of water installed and operating discharged from the EPL5473 Ongoing 2022 NA effectively Mine Site complies with EPL limits Domain 2C – Residue Storage Facility –

Heap Leach Soils, hydrology, and grassland Upper surface of facility capped Rainfall is used by vegetation ecosystem with maintenance needs no with clay and topsoil. Pasture or else shed from landform greater than those of surrounding land mix of annual and perennial (ie no deep infiltration) A MOP 2003 introduced and native species sign of failure would be Completed 2005 NA leachate return to pregnant (Pg 54) pond.

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Table 15 (Cont’d)

Rehabilitation Performance Indicators and Completion Criteria Page 7 of 10

Progress at TARP Justification/ Expected Objective Performance Indicator Completion Criteria start of Ref Source Completion MOP No. Phase 4 – Growth Medium Development (Cont’d) Domain 2 C– Residue Storage Facility - Heap Leach (Cont’d) Soils, hydrology, and grassland Key soil characteristics in the Key topsoil parameters ecosystem with maintenance needs no range of pre-mining soil similar to pre mining levels greater than those of surrounding land characteristics for Red Dermosol as follows. (Cont’d) soils • pH – 5.3 to 7.0 • Electrical conductivity – 0.21 to 0.40dS/m. • Cation exchange capacity SSM (2011) – – 4.9 to 7.1meq/100g Commenced 2022 NA After Table 3 • Dispersion index – 4 to 5 • Phosphorus Colwell – 12 to 48mg/kg • Nitrate N – 4.3 to 26mg/kg • Exchangeable Sodium % - 0.6 to 3.2% Suitable surface water controls No significant soil erosion installed and operating and only clean water effectively discharging down flume in rainfall events. Water MOP 2003 Achieved 2014 NA carrying suspended solids will indicate failure. (only visual observation for measurement) Domain 4C – Waste Rock Emplacement

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Progress at TARP Justification/ Expected Objective Performance Indicator Completion Criteria start of Ref Source Completion MOP No. Soils, hydrology, and grassland/grassy Minimum 200mm of soil Stability, infiltration and woodland ecosystem with maintenance material spread unless nutrient cycling needs no greater than those of rehabilitation trials indicate that measurements indicate a surrounding land an alternative thickness is healthy functioning acceptable ecosystem. A variety of MOP 2014 repeatable easurements are and Graminus Completed 2002 NA made across 14 fixed consulting transects by LFA consultant and the metrics generated inform on ecosuystem function. Suitable surface water controls No erosion nor infiltration of installed and operating WRE MOP 2003 Completed 2002 NA effectively

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Table 15 (Cont’d)

Rehabilitation Performance Indicators and Completion Criteria

Page 9 of 10

Progress at TARP Justification/ Expected Objective Performance Indicator Completion Criteria start of Ref Source Completion MOP No. Phase 6 - Ecosystem and Land Use Sustainability Domain A - Infrastructure Remaining infrastructure suitable for a Infrastructure remaining at the Infrastructure safe and lawful final land use end of the mine life is suitable suitable for a lawful final MOP 2014 Existing 1996 NA for a lawful final land use land use Domain C – Grassland Vegetation dominated by perennial Landscape Function Analysis Stability, infiltration/runoff MOP 2014 2022 NA (native and introduced) grassland undertaken using the procedures and nutrient cycling indices species of Tongway and Lindley (2004) consistent with analogue site Commenced (Note some rehab transects are already better than undisturbed analogue sites) Shrub and tree species have not Annual inspection and MOP 2014 2022 NA become established photographs reported in Commenced AEMR Vegetation self-sustaining Evidence of natural MOP 2014 2022 NA regeneration and recruitment Commenced reported in AEMR Weed and pest species Weed and pest inspection MOP 2014 2022 management requirements and control programs comparable to analogue sites indicate that comparable Commenced NA management requirements for disturbed and analogue sites reported in AEMR Domain E –Woodland

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Progress at TARP Justification/ Expected Objective Performance Indicator Completion Criteria start of Ref Source Completion MOP No. Vegetation consistent with the Vegetation self-sustaining This is natural regeneration MOP 2014 Tumbledown Gum/ Currawang (Bobby Burns and Parkers Cut from seed contained in It has already community on the hill and Inland Grey Back) topsoil and/or blown into the happened Box-Poplar Box-White Cypress Pine open cuts from surrounding post 2002 Community (Benson 76) on Lot 380 plant communities. Commenced 2022 NA Photographic record of success.

Weed and pest species Weed and pest maintenance management requirements by PHGM Site Supervisor MOP 2014 Commenced 2022 NA comparable to analogue sites now minimal Progress at TARP Justification/ Expected Objective Performance Indicator Completion Criteria start of Ref Source Completion MOP No. Phase 6 - Ecosystem and Land Use Sustainability (Cont’d) Domain G – Rural Land Land capability similar to existing land Agricultural potential similar to LFA (3 reports across capability undisturbed analogue sites. Only different seasons) on land that has not been disturbed analogue sites confirms by mining (other than soil ecosystem is functioning MOP 2014 Completed 2005 NA stockpiling) is going back to sustainably agricultural land. This land was agricultural land before mining and continues to be so. Phase 7 – Land Relinquishment All domains Demonstrated compliance with the above Commenced 2022 NA No land is to be relinquished during the term of this MOP. Final relinquishment will rely on sustained demonstration of compliance with completion criteria for Phase 5 – Ecosystem and land Use Sustainability

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

7. REHABILITATION IMPLE MENTATION 7.1 STATUS AT MOP COMMENCEMENT Table 16 presents the status of rehabilitation at the commencement of the MOP. Table 16

Status of Rehabilitation at the Commencement of the MOP

Status of Rehabilitation at the Commencement of Primary Domain Secondary Domain the MOP 1 –Infrastructure Area A – Infrastructure Nil rehabilitation – Active area J – Biodiversity Nil rehabilitation – Active area 2 - Residue Storage C - Grassland Rehabilitated to final landform – LFA monitoring Facility (Heap leach) 3 – Water Management B – Water Management Stabilisation complete. Riparian vegetation at 10m Area Area height & regenerating naturally 4 – Waste Rock C - Grassland Rehabilitated to final landform – LFA monitoring Emplacement 4 – ROM Pad E –Woodland Rehabilitated to final landform 5 – Soil Stockpiles G – Rehab area class IV Temporary stabilisation with cover crops established rural land 6 – Open Cut Voids I – Final Void Rehabilitated to final landform 7 – Rehabilitated Areas C – Grassland Rehabilitated to final landform in 1998 9 - Conservation and J - Conservation and Rehabilitated to final landform and use as tourist mine Biodiversity Areas Biodiversity Areas 10 – Rural Land G - Rural Land Land management practices, including weed and pest management ongoing. Note 1: Biodiversity Offsets were not required as a consent condition for the Peak Hill Gold Mine Development which predated current regulations

7.2 PROPOSED REHABILITATION ACTIVITIES DURING THE MOP TERM 7.2.1 Introduction This Section provides an overview of the rehabilitation activities proposed to be implemented over the MOP term on a domain by domain basis. Reference is made to the rehabilitation phases described in Section 5.3. The descriptions provided in this Section are consistent with the rehabilitation activities presented on Maps 3A to 3C.

7.2.2 Domain 1 – Infrastructure Area Domain 1 – Infrastructure Area would remain as an active area throughout the term of the MOP and no rehabilitation is proposed until late in the MOP period (2021). Through the MREMP process the Company seeks a modification of the DA 648/93 to allow for the retention of the house, office and car port, laboratory, crib hut, shed and core yard.

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

These assets have a continuing valuable use as exploration assets as Alkane explores for minerals in the Peak Hill-Tomingley-Parkes district. Should the Company or any subsequent owner of the Peak Hill tenements continue to evaluate the Peak Hill sulphide resource and other potential mineral targets these assets will complement that work. If no further use can be found for the HDPE processing and overflow ponds then the plastic liners will be pulled up and buried in one of the pond excavations. The plastic would be weighted down with the concrete from the wetplant slab and other concrete footings and then be covered with clay and top soil. The final land use for the processing ponds would be as ephemeral wetlands. They will gather rainfall and wet and dry with seasons. The design capacity of these structures is such that they will not overflow and hence rainfall will evaporate at a higher rate than it accumulates. Like the sediment ponds and other low lying areas of the mine site these ponds will ultimately establish as biodiversity hotspots for frog and other aquatic fauna and avi-fauna.

7.2.3 Domain 2 - Residue Storage Facility – Heap Leach Domain 2 – The heap leach final land form will continue to be monitored to ensure that it becomes a long term stable functioning landscape unit. Landscape Function Analysis (by Graminus Consulting) commenced on the heap leach in 2013 and will continue to do so until data sets confirm that this landform is equal to or better than the surrounding landscape. Bare patches of the heap leach will receive lime addition and other rehabilitation strategies to ensure adequate vegetative cover over the whole landform.

7.2.4 Domain 3 – Water Management Area Domain 3 – The Water Management Areas do not require any additional rehabilitation. They are surrounded by naturally regenerating riparian species and have improved the aesthetics and biodiversity value of the mine site. No water has ever discharged from the northwest sediment pond and only during an unusually large rain event would the northeast sediment pond overflow. There are no potential water contaminants on the site (other than encapsulated sulphides) and the mine site has seen no active mining activity since December 2005 when the heap leach landform was shaped and rehabilitated. All waterways and drains that direct receiving waters to the sediments have stable vegetation in them which assist the delivery of ‘clean’ water to these licenced discharge points. Through the MREMP process and consultation with the EPA it is anticipated that Alkane will be able to relinquish its Environment Protection Licence.

7.2.5 Domain 4 – Waste Rock Emplacement The Waste Rock Emplacement will be monitored using LFA as a tool. Bare patches suspected as being caused by a combination of thin or no topsoil will be treated with agricultural lime and or the addition of fresh topsoil. There will be a small area on the southern edge of the ROM pad that will be disturbed during 2015 when approximately 20 tonnes of material (retrieved from historic workings in Proprietary

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

pit during mining) will be returned to Gilligan’s Island. The affected area will be re-contoured and topsoiled and seed. There will be no other disturbance of this domain during the MOP period.

7.2.6 Domain 5 – Soil Stockpile The one remaining topsoil stockpile will be accessed in 2015 and removed completely in 2021 when the processing ponds are decommissioned.

7.2.7 Domain 6 – Open Cut Voids The Open Cuts have been rehabilitated to achieve relinquishment. Maintenance of man-proof fences and visual inspections by the site supervisor of open cut batters continues.

7.2.8 Domain 7 – Rehabilitated Areas Rehabilitated Areas includes those sections of the Mine Site that were barely disturbed by mining activity 1996-2005. These areas were previously used for cropping, grazing and water management (constructed waterways). These areas are similar to analogue sites where agriculture has ceased. There is good grass and pasture cover which supports native fauna. The floral assemblage contains a mixture of perennial and annual introduced and native species. There is natural regeneration of tree species that occur within a Grey Box woodland community. The only activity carried out on this area during the MOP period will be weed control (African Boxthorn and Bathurst Burrs). Two control site for the LFA monitoring are contained within this domain.

7.2.9 Domain 9 - Conservation and Biodiversity Areas The dominant post mining land use on the mining leases is biodiversity conservation. The woodland surrounding the open cuts supports tourism activities (bushwalking) and a variety of biodiversity. The only activities proposed during the MOP period in this domain is weed and pest animal control. Some minor maintenance of signage and tourist mine assets is anticipated.

7.2.10 Domain 10 – Rural Land This domain has not been impacted by mining activities 1996-2005 and will not be impacted during this MOP period. This Domain is currently licenced to be grazed and is so by the tenant who lives at “Little Oakleigh”.

7.3 SUMMARY OF REHABILITATION AREAS DURING THE MOP TERM Table 17 presents a summary of the rehabilitation that would be implemented during the life of the MOP.

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Table 17

Rehabilitation at Commencement and Completion of MOP

Start of End of Primary Secondary Code (with Rehabilitation Phase MOP MOP Domain Domain map legend) (ha) (ha) 1 – A – 1A Active 4.3 4.3 Infrastructure Infrastructure Area Total 4.3 4.3 1 – J – Biodiversity 1J Ecosystem Sustainability 0 4.2 Infrastructure Area (process Total 0 4.2 Ponds) 2 - Residue C - Grassland 2C Ecosystem Sustainability 24 24 Heap Leach Total 24 24 3 – Water B – Water 3B Ecosystem Sustainability 1.5 1.5 Management Management Area Area Total 1.5 1.5 4 – Waste Rock C - Grassland 4C Ecosystem Sustainability 22.7 22.7 Emplacement Total 22.7 22.7 4 – Waste Rock E – Woodland 4C/E Ecosystem Sustainability 4.5 4.5 Emplacement (ROM)

Total 4.5 4.5 5 – Soil G – Rural Land 5G Ecosystem Establishment 0.7 0 Stockpile Ecosystem Sustainability 0 0.7 Total 0.7 0.7 6 – Open Cut I – Final Void 6I Ecosystem Sustainability 14.6 14.6 Voids Total 14.6 14.6 7. – G - grassland 7C Ecosystem Sustainability 1.3 1.3 Rehabilitation Total 1.3 1.3 Area 9 - J - 9J Ecosystem Sustainability 76.0 76.0 Conservation Conservation and and Biodiversity Biodiversity Areas Areas Total 76.0 76.0 10 – Rural G – Rural Land 10G Ecosystem Sustainability 47.0 47.0 Land Total 47.0 47.0 Grand Total 196.6 200.8 Note: All but 4.2Ha of the mine site has been rehabilitated since 2005 which is why most of the site has been assigned as Ecosystem Sustainability

Source: Alkane Resources Ltd

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

7.4 RELINQUISHMENT PHASE ACHIEVED DURING MOP PERIOD The Company does not anticipate that the relinquishment phase will be achieved for any land within the Mine Site during the term of the MOP.

8. REHABILITATION MONIT O R I N G A N D RESEARCH 8.1 REHABILITATION MONITORING Rehabilitation monitoring will focus upon determining whether progress towards achieving the relevant performance indicators and completion and relinquishment criteria presented in Section 6 and Table 15 is being achieved. Table 18 presents the proposed rehabilitation monitoring methodology and frequency for each indicator and criteria identified in Table 14.

8.2 RESEARCH AND REHABILITATION TRIALS The Peak Hill Gold Mine engaged some rehabilitation and research/trials during operations and the results of these trials were documented in the MREMP documents over the life of the mine. The site is visited on average by two educational research/teaching institutions or special interest groups each year such as but not limited to;

Sustainable Minerals Institute Knowledge Transfer - University of QLD, International Mining for Development Centre (IM4DC), Local Land Services, Central West Catchment Management Authority, Central West Mining & Extractive Environment Team (MEET), NSW Minerals Council and Graminus Consulting (LFA) The Company has been generous in sharing the environmental knowledge learnt from the Peak Hill Gold Mine.

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Table 18

Rehabilitation Monitoring Methodology and Frequency Page 1 of 6

Rehabilitation Monitoring Monitoring Objective Performance Indicator Completion Criteria Methodology Frequency Phase 1 – Decommissioning Domain 1 – Infrastructure Area All infrastructure and services not Services disconnected Services not required for Photographs 2021 suitable for a lawful final land use final land use disconnected will be removed Infrastructure removed Infrastructure not required Photographs 2021 for a lawful final land use removed Domain safe and free from Contaminated land identified Contaminated land Contamination report prepare by Following hazardous materials and remediated assessment indicates no qualified person decommissioning contamination exists/remains No hazardous materials remain All hazardous materials Contamination report prepare by Following removed qualified person decommissioning Domain 2 – Residue Storage Facility – Heap Leach Final landform in place and Diverse and healthy vegetative Functioning grassland Landscape Function Analysis Seasonal until rehabilitated in 2005 cover ecosystem satisfactory Landform non-polluting No leachate emanating from Observation during rain events and Annually heap leach water quality testing at northeast sediment pond as required

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Table 18 (Cont’d)

Rehabilitation Monitoring Methodology and Frequency Page 2 of 6

Rehabilitation Monitoring Monitoring Objective Performance Indicator Completion Criteria Methodology Frequency Phase 1 – Decommissioning (Cont’d) Domain 3 – Water Management Areas Domain stable and non-polluting Achieved Water management Water quality testing only if a After significant rain structures to remain on site pollution incident is suspected (highly events. Only the as epheral wetlands and unlikely) northeast sediment water bodies pond discharges. Domain 4 – Waste Rock Emplacement & ROM Pad Stable and permanent landform Landform geotechnically Landform geotechnically Landscape Function Analysis Seasonal until established stable, healthy and diverse stable and supporting a (Reports) satisfactory vegetative cover, clean water functioning grassland discharge during rain events ecosystem. Domain 5 – Soil stockpile Land capability similar to existing Stockpiled soil used for Stockpiled soil removed Photographs Not necessary land capability rehabilitation of other domains

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Table 18 (Cont’d)

Rehabilitation Monitoring Methodology and Frequency Page 3 of 6

Rehabilitation Monitoring Monitoring Objective Performance Indicator Completion Criteria Methodology Frequency Phase 4 – Ecosystem and Land Use Establishment (Cont’d) Domain /E –Woodland (Cont’d) Vegetation consistent with Weed species and abundance Summer and winter weed Weed inspection (and subsequent Six monthly Tumbledown Gum/Currawang consistent with analogue sites inspection and control control program, if required) Community program, including inspection of analogue sites, reported in AEMR Grazing by feral and native Feral and native animal Photographs Annually fauna and stock not adversely control programs Control program reports prepared by impacting on ecosystem implemented and reported suitably qualified persons development in AEMR Grazing managed for biodiversity development purposes

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Table 18 (Cont’d)

Rehabilitation Performance Indicators and Completion Criteria Page 4 of 6

Rehabilitation Monitoring Monitoring Objective Performance Indicator Completion Criteria Methodology Frequency Phase 4 – Ecosystem and Land Use Establishment (Cont’d) Domain G – Rural Land (Cont’d) Land capability similar to existing Revegetation species mix Revegetation report and 6 Revegetation report On completion land capability (Cont’d) applied in accordance with monthly monitoring native pasture species listed in presented in AEMR Table 15

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Table 18 (Cont’d)

Rehabilitation Monitoring Methodology and Frequency Page 5 of 6

Rehabilitation Monitoring Monitoring Objective Performance Indicator Completion Criteria Methodology Frequency Phase 4 – Ecosystem and Land Use Establishment (Cont’d) Domain J - Conservation and Biodiversity Offset Areas Maximise preservation of remnant Weeds and macropod Weed species and Weed inspection (and subsequent Six monthly Inland Grey Box Woodland and population controlled abundance consistent with control program, if required) Tumbledown Gum/Currawang analogue sites Communities

Preserve maximum amount of remnant vegetation. Species diversity consistent Diversity of species Observation Annually by suitably with the Tumbledown consistent with analogue qualified person Gum/Currawang community sites Phase 5 - Ecosystem and Land Use Sustainability Domain A - Infrastructure Remaining infrastructure suitable Infrastructure remaining at the Infrastructure safe and Photographs Prior to for a lawful final land use end of the mine life is suitable suitable for a lawful final relinquishment for a lawful final land use land use Domain C – Grassland Vegetation dominated by grassland Landscape Function Analysis Stability, infiltration/runoff Assessment report prepared by Seasonally by suitably species undertaken using the and nutrient cycling indices suitably qualified person using the qualified consultant procedures of Tongway and consistent with analogue methodology of Tongway and Lindley until site considered Lindley (2004) reported in the site(s) (2004) to be long term stable AEMR

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Table 18 (Cont’d)

Rehabilitation Monitoring Methodology and Frequency Page 6 of 6

Rehabilitation Monitoring Monitoring Objective Performance Indicator Completion Criteria Methodology Frequency Phase 5 - Ecosystem and Land Use Sustainability (Cont’d) Domain C – Grassland (Cont’d) Weed and pest species Weed and pest inspection Weed and pest inspection (and Six monthly management requirements and control programs subsequent control program, if comparable to analogue sites indicate that comparable required) management requirements for disturbed and analogue sites reported in AEMR Domain G – Rural Land Land capability similar to existing Agricultural potential similar to Annual land capability undisturbed analogue sites

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

9. INTERVENTION AND ADA P T I V E MANAGEMENT 9.1 THREATS TO REHABILITATION Section 3.1 of this document presents an assessment of environmental risks associated with the Mine. Similarly, this subsection presents an analysis of the specific risks or threats to rehabilitation within the Mine Site. This analysis of threats to rehabilitation has been prepared broadly in accordance with the requirements of AS/NZS ISO31000:2009 Risk Management - Principles & Guidelines. In summary, threats to rehabilitation were identified based on the performance indicators and completion criteria identified in Table 19. For each threat, potential adverse outcomes were identified and allocated a risk based on the potential consequences and likelihood of occurrence. Risks were determined based on implementation of industry standard mitigation measures and the Company’s commitments embodied in the Statement of Commitments presented as Appendix 7 of PA 09_0155. Where risks were determined to be unacceptable, namely those risks classified as “moderate” or above, a Trigger, Action, Response Plan has been developed and is presented in Section 9.2. Tables 6, 7 and 8 present the consequence, likelihood and risk rating used during this analysis. Table 9 presents the results of the risk analysis.

9.2 TRIGGER ACTION RESPONSE PLAN Table 20 presents the Trigger Action Response Plan for each of the rehabilitation threats and potential adverse outcomes identified in Table 19 as having a risk rating of moderate or above. Table 20 also provides individual reference numbers for each Trigger Action Response.

10. REPORTING Alkane produces an annual or biennial AEMR. This report includes monitoring data associated with rehabilitation works undertaken for the Mine. It also provides commentary assessing the data against performance criteria. Some of the key areas reported against are: • Surface water monitoring. – Sampling of discharge points.

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Table 19

Analysis of Rehabilitation Threats Consequence Likelihood of Risk Rehabilitation Threat Potential Adverse Outcome of Occurrence Rating Occurrence Failure to remove Unable to complete rehabilitation or establish 2 E L infrastructure the identified final land use Failure to remove Unable to complete rehabilitation or establish 2 E L hazardous materials the identified final land use Contaminated land present 3 E M Waste Rock Emplacement generates Acid Failure to address Mine Drainage and is thus a source of 3 D M contamination contaminated leachate Heap Leach is a source of contaminated 3 D M leachate Geotechnical instability of final open cut voids 2 C M Geotechnical instability of Waste Rock 2 E L Emplacements or ROM Pad Final landform not safe, M stable and secure Geotechnical instability of Heap Leach 3 D

Public access to open cut voids possible 4 C H

Landforms overrun by pest plants and animals 2 D L Vegetation community is Final landform requires significantly more 3 D M not self-sustaining management than analogue sites

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Table 20

Trigger Action Response Plan Page 1 of 2

TARP Ref Rehabilitation Threat Potential Adverse Outcome Trigger Action/ Response No • Contamination assessment identifies • Recommendations of contamination contaminated land present within assessment implemented. Contaminated land present 1 Mine Site. • Contamination assessment reviewed until contamination has been removed. • Visual inspection indicates iron • Preparation of an Acid Rock Drainage staining or other evidence of metal Management Plan identifying suitable Waste Rock Emplacement is a source of precipitation in outflow zones. measures to manage existing leachate 2 contaminated leachate • Gradual decrease in pH of northeast generation and prevent further Failure to address sediment pond. inappropriate placement of acid- contamination generating waste rock. • Monitoring indicates that Residue • Heap Leach Management Plan prepared or leachate (if present) does not updated by a suitably qualified expert. comply with trigger values for Plan would provide recommendations re Heap Leach is a source of contaminated upland river systems determined in remedial actions and monitoring to 3 leachate accordance with ANZECC (2000). measure success of those actions. • Water monitoring indicates leachate • Recommendations to be implemented in is leaking from Residue Storage consultation with Division of Resources Facility. and Energy. • Monitoring or final closure • Suitably qualified geotechnical engineer geotechnical assessment identifies engaged to assess the instability and instability/ unacceptable movement provide a range of recommendations to Final landform not safe, Geotechnical instability of final open cut voids (actual or potential) in final face of remediate the instability. 4 stable and secure open cut void. • Recommendations to be implemented in • Open Cut high wall breaks back consultation with Division of Resources beyond man-proof perimeter fence. and Energy.

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Table 20 (Cont’d)

Trigger Action Response Plan Page 2 of 2

TARP Ref Rehabilitation Threat Potential Adverse Outcome Trigger Action/ Response No • Surface water monitoring or visual • Site personnel to identify site of erosion inspection indicates that final and remediate through additional landform is the source of earthworks, soil works, revegetation or Sediment and erosion unacceptable levels sedimentation. other stabilisation method. control structures Final landform is a source of pollution • If the above is unsuccessful, a suitably 5 inadequate or fail qualified professional in sediment and erosion control engaged to prepare an assessment report and recommendations to be implemented. • The vegetation community on the • Suitably qualified ecologist or revegetation Vegetation community is Final landform requires significantly more final landform requires significantly expert engaged to assess reasons for more land management that an additional management requirements and 6 not self-sustaining management than analogue sites undisturbed analogue sites. recommend actions to align management required with that of the analogue sites.

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

• Biodiversity monitoring. – Photographs and Vegetation Surveys. – Weed Zone Monitoring.

11. REVIEW AND IMPLEMENTATION OF THE MOP 11.1 REVIEW OF THE MOP This plan will be reviewed annually, with any resultant changes or improvements identified in the Annual Environmental Management Review.

11.2 IMPLEMENTATION Table 21 outlines the roles and responsibilities of personnel who have responsibility for monitoring, review and implementation for this MOP. Table 21

Roles and Responsibilities for MOP Implementation

Role Responsibilities COO Ensure adequate resources are available to enable implementation of the Plan. General Manager NSW Monitoring and review of performance via field inspections and Annual Environmental Management Reports. PHGM Site Supervisor Accountable for the minesite security, safety and weed and pest animal control.

12. REFERENCES ANZECC (2000). Australian and New Zealand Guidelines for Marine and Fresh Water Quality. Department of Environment and Climate Change (DECC) (2008b). Managing Urban Stormwater: Soils and Construction, Vol. 2E, DECC, NSW, Sydney. Graminus Consulting (2014). Alkane Resources Peak Hill Gold Mine Landscape Function Analysis Report 3, May 2014 Landcom (2004). Managing Urban Stormwater: Soils and Construction. 4th Edition. Landcom, Sydney. M.D. Sutherland (2002). Peak Hill Gold Mine - Mine Operations Plan for 2002 and Annual Environmental Management Report for 2001 (including Draft Mine Closure Plan) R.W. Corkery & Co. Pty Limited (RWC) (1993). Associated Gold Fields NL and Alkane Exploration NL Environmental Impact Statement for the Peak Hill Gold Project Tongway DJ and Lindley NL (2004). Landscape function analysis. Procedures for monitoring and assessing landscapes.

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Plans and Section

(Total No. of pages including blank pages = 32)

Plan 1A Pre Mining Environment – Project Location Plan 1B Pre Mining Environment – Natural Environment Plan 1C Pre Mining Environment – Built Environment Plan 2 Mine Domains at Commencement of MOP Plan 3A Mining and Rehabilitation – End Year 1 Plan 3B Mining and Rehabilitation – End Year 6 Plan 3C Mining and Rehabilitation – End of MOP Plan 4 Final Rehabilitation and Post mining Land Use – 2022 Plan 5a Cross Section A

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Plan 1A Pre Mining Environment – Project Location • Show the location of the project in a State wide context, identifying the main and surrounding Local Government area/s and major towns. • Plans should show surface and subsurface leases where relevant.

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Plan 2 Mine Domains at Commencement of MOP • This plan shows the mine domains and the mining features at commencement of the MOP. Include the following information: • Primary Domains (operational) and Secondary Domains (post Mining Land Use); • Main roads, railways and towns; • Development including all built features and improvements, e.g. fences, transmission lines, pipelines, dams, building and structures; • Cadastral information – land ownership boundaries and ownership notations; • Surface contours, e.g. 5 metre contour intervals for ope cut coal mines are standard; however 1 metre or less may be necessary to show an appropriate level of detail for some areas; • Water course and drainage directions; • Existing dams; and • Location of cross sections.

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Plan 3A Mining and Rehabilitation – End Year 1

This is a series of plans which show the annual sequence of mining and rehabilitation activities over the term of the MOP. A Plan is to be produced for each year of the MOP term where relevant to the operation i.e. Plan 3A = Year 1, Plan 3B = Year 2, etc.

Each plan is to include:

• Active Primary domains (Operational) and Secondary Domains (Post Mining Land Use); • Surface contours e.g. 5 metre contour intervals for open cut coal mines are standard; however 1 metre or less may be necessary to show an appropriate level of detail for some areas; • For underground mines, the limit of subsidence to 20mm; • Expected active mining area (for open cut and underground operations); • Areas that are excised from the Mining Lease; • Rehabilitation areas scheduled to be completed in each year aligned to the relevant phases of the site rehabilitation program: – Decommissioning; – Landform establishment; – Growth medium development; – Ecosystem and land use establishment; – Ecosystem and land use sustainability; or – Relinquished lands.

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Plan 3B Mining and Rehabilitation – End Year 6

Each plan is to include: • Active Primary domains (Operational) and Secondary Domains (Post Mining Land Use); • Surface contours e.g. 5 metre contour intervals for open cut coal mines are standard; however 1 metre or less may be necessary to show an appropriate level of detail for some areas; • For underground mines, the limit of subsidence to 20mm; • Expected active mining area (for open cut and underground operations); • Areas that are excised from the Mining Lease; • Rehabilitation areas scheduled to be completed in each year aligned to the relevant phases of the site rehabilitation program: – Decommissioning; – Landform establishment; – Growth medium development; – Ecosystem and land use establishment; – Ecosystem and land use sustainability; – Relinquished lands; – Landform establishment; – Growth medium development; – Ecosystem and land use establishment; – Ecosystem and land use sustainability; or – Relinquished lands.

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Plan 3C Mining and Rehabilitation – End of MOP

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Plan 4 Final Rehabilitation and Post mining Land Use – 2022 This Plan shows the proposed post mining land use and landform at the completion of the project i.e. at the end of the mine life. Plan 4 should include the following information:

• Secondary domain (post mining land use) boundaries including: – Water management areas which may include voids/pits and water storage areas. This domain is to include, where relevant, constructed drainage lines, water control structures, and water supply dams; – Vegetation communities – e.g. specific plant communities pasture, land suitable for future development; – Infrastructure – labelled appropriately to define the post mining land use; and – Heritage items to remain on site after mine closure. • Natural features including wetlands, rivers. Creeks, streams or watercourses; • Offsets that are managed under a different series of criteria; • Surface contours, e.g. 5 metre contour intervals for open cut coal mines are standard; however 1 metre or less may be necessary to show an appropriate level of detail for some areas; • Land capability classification or agricultural capability (where applicable); • Wildlife corridors that adjoin the mine lease and / or cross the mine lease; • Features relevant to other agency licences, approvals of other government agencies or their relinquishment; • Fences, bunds and other public, fauna and stock safety features; and • Reference to the year/date then plan displays.

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Plan 5a Cross Section A Vertical and longitudinal sections should be selected to support and clarify plans and text. The purpose of this information is to show the mine progress in relation to the proposed final landform. The plans should describe the mine sections, the vertical extent of mining, emplacement shapes and sections including:

• Current shape; • Emplaced materials – overburden and / or Residue; • Floor of the open cut; • Natural surface; • Final landform; • Cover layers, including topsoil over emplacements and other disturbed areas; • Environment control features; • Water management structures; • Proximity to key infrastructure; • Geological seams of relevance to the mining operations; • Vegetation communities; and features to protect rehabilitated areas and areas under rehabilitation. • For open cut coal mines, sections at right angles to the direction of mining at intervals of 1000 metres would be appropriate. Unless highly irregular in shape, two sections at right angles should be sufficient for most other mines, waste emplacements and infrastructure features. Vertical sections must state the vertical exaggeration.

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

Appendices

Appendix I Mining Lease Appendix II DA 648/93 Appendix III Security Calculation Estimate Appendix IV Environment Protection Licence 5473 Appendix V Tourist Mine Permit

MINING OPERATIONS PLAN 2014-2022 ALKANE RESOURCES LTD Peak Hill Gold Mine

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