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Ivanhoe Coal Pty Ltd Ivanhoe North Rehabilitation Project Revised Site Water Management Plan (Revision 3) June 2010

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Page 1: Ivanhoe Coal Pty Ltd...Ivanhoe Coal Pty Ltd (Ivanhoe Coal), a wholly owned subsidiary of Centennial Coal Pty Ltd, ... process and the role of water management within that coal handling

Ivanhoe Coal Pty Ltd

Ivanhoe North Rehabilitation ProjectRevised Site Water Management Plan(Revision 3)June 2010

Page 2: Ivanhoe Coal Pty Ltd...Ivanhoe Coal Pty Ltd (Ivanhoe Coal), a wholly owned subsidiary of Centennial Coal Pty Ltd, ... process and the role of water management within that coal handling

Ivanhoe North Rehabilitation Project

Contents

Glossary

Abbreviations

Executive Summary

1. Introduction...........................................................................................1-11.1 Scope.............................................................................................................1-1

1.2 Objectives of this Report.................................................................................1-1

2. Site Overview .......................................................................................2-12.1 Naming Clarification........................................................................................2-1

2.2 Project History ................................................................................................2-1

2.3 Current Project Description.............................................................................2-2

2.4 Project Site.....................................................................................................2-3

2.5 Coal Production Process.................................................................................2-5

2.6 Water Management System............................................................................2-8

2.7 Water Management Structures .......................................................................2-8

3. Surface Water Management.................................................................3-13.1 Surface Water System....................................................................................3-1

4. Clean Water Runoff ..............................................................................4-14.1 Potable & Ablutions Water ..............................................................................4-1

4.2 Ivanhoe North Clean Water Catchments .........................................................4-1

4.3 External Clean Water Catchments ..................................................................4-1

4.4 Clean Water Dams .........................................................................................4-3

4.5 Clean Water Diversion Drains.........................................................................4-7

5. Minimisation of Dirty Water Discharge..................................................5-15.1 Dirty Water Catchment Areas..........................................................................5-1

5.2 Dirty Water Surface Diversions .......................................................................5-2

5.3 Dirty Water Surface Storages..........................................................................5-2

6. Maximisation of Water Recirculation ....................................................6-1

7. Development Consent Conditions ........................................................7-1

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Ivanhoe North Rehabilitation Project

8. Monitoring.............................................................................................8-18.1 Inspections .....................................................................................................8-1

8.2 Surface Water Quantity and Quality Monitoring...............................................8-2

8.3 Management Meetings ...................................................................................8-2

8.4 Reporting........................................................................................................8-3

8.5 Document Control...........................................................................................8-3

9. Supervision...........................................................................................9-19.1 Instruction.......................................................................................................9-1

9.2 Responsibilities...............................................................................................9-1

9.3 Communications and Information....................................................................9-2

9.4 Training ..........................................................................................................9-2

9.5 Environmental Induction .................................................................................9-2

10. Revision..............................................................................................10-110.1 Audits and Review........................................................................................10-1

10.2 Revision Table..............................................................................................10-1

11. Water Balance....................................................................................11-111.1 Topography ..................................................................................................11-1

11.2 Climate Data.................................................................................................11-1

11.3 Inputs ...........................................................................................................11-2

11.4 Outputs.........................................................................................................11-2

11.5 Water Balance..............................................................................................11-3

11.6 Summary......................................................................................................11-3

11.7 Annual Re-Calculation of the Water Balance.................................................11-3

12. Erosion and Sediment Control............................................................12-112.1 Management Principles ................................................................................12-1

12.2 Potential Sources of Erosion.........................................................................12-2

12.3 Erosion and Sediment Control System..........................................................12-2

13. Legislation ..........................................................................................13-113.1 Legislation ....................................................................................................13-1

13.2 Policy ...........................................................................................................13-1

Table IndexTable 2.1 Water Management Structures.............................................................2-8

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Ivanhoe North Rehabilitation Project

Figure IndexFigure 1.1 Locality Plan .....................................................................................1-2

Figure 2.1 Project Site .......................................................................................2-4

Figure 2.2 Coal Processing Diagram..................................................................2-7

Figure 2.3 In-situ Coal Seams............................................................................2-7

Figure 2.4 Surface Storages Plan ......................................................................2-9

Figure 3.1 Surface Water Management Schematic ............................................3-2

Figure 4.1 Culvert across Castlereagh Highway and scour hole .........................4-2

Figure 4.2 Clean Water Dam No.1 .....................................................................4-4

Figure 4.3 Clean Water Dam No.2 .....................................................................4-5

Figure 4.4 Clean Water Dam No.3 .....................................................................4-6

Figure 4.5 Clean Water Dam No.4 .....................................................................4-7

Figure 4.6 Clean Water System .........................................................................4-8

Figure 5.1 Sediment Dam No.1..........................................................................5-3

Figure 5.2 Sediment Dam No.3..........................................................................5-5

Figure 5.3 ‘First Flush’ Sediment Pond...............................................................5-6

Figure 5.4 Dirty Water System ...........................................................................5-7

Figure 8.1 Surface Water Monitoring Locations..................................................8-4

AppendicesAppendix A

Appendix B

Appendix C

Appendix D

Appendix E

Appendix F

Appendix G

Appendix H

Appendix I

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Ivanhoe North Rehabilitation Project

RSWMP Revision 3: Glossary

Glossary

Average RecurrenceInterval

A statistical estimate of the average period in years between theoccurrence of a flood of a given size or larger, eg. floods with a dischargeas big as, or larger than, the 100-year ARI flood event will occur onaverage once every 100 years. ARI is equal to the reciprocal of annualflood risk, e.g. an AFR of 1/100 has an ARI of 100 years.

Clean catchmentareas

Catchments in which there are no exposed surfaces containing coal ormined carbonaceous material.

Clean water Waters on the premises that have not come into physical contact with coal,or mined carbonaceous material.

Dirty catchmentareas

Catchments in which coal mined carbonaceous materials are present orareas where the topsoil has been disturbed.

Dirty water Water on the premises that has come into physical contact with coal,mined carbonaceous materials or otherwise contains elevated sedimentload.

Groundwater Water held in strata that is not overlying the strata of the coal seam, orwithin the coal seam.

Licensed DischargePoint

A location where water discharges in accordance with conditions stipulatedwithin the site Environment Protection License.

Sediment-ladenwater

Water that has a high level of suspended solids.

Surface Water Water that is derived from precipitation or pumped from underground andmay be stored in dams, rivers, creeks and drainage lines.

Temporary storage Volume of storage available within a dam between the permanent waterlevel and the overflow level.

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Ivanhoe North Rehabilitation Project

RSWMP Revision 3: Abbreviations

Abbreviations

AEMR Annual Environmental Management Report

AHD Australian Height Datum

DECCW Department of Environment, Climate Change and Water

DoP Department of Planning

DPI Department of Primary Industries

EA Environmental Assessment

EP&A Act Environmental Planning and Assessment Act 1979

EPL Environment Protection Licence

kL Kilolitres

m Metres

ML Megalitres

OCE Open Cut Examiner

PA Project Approval

ROM Run of Mine

RSWMP Revised Surface Water Management Plan

SECP Sediment and Erosion Control Plan

SWMP Surface Water Management Plan

T Tonnes

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Ivanhoe North Rehabilitation Project

RSWMP Revision 3: Executive Summary

Executive Summary

Ivanhoe Coal Pty Ltd (Ivanhoe Coal), a wholly owned subsidiary of Centennial Coal Pty Ltd,is carrying out a small open cut mining operation in conjunction with rehabilitation of theabandoned Cullen Main West Mine, known as the Ivanhoe North Rehabilitation Project.

The rehabilitation project will progressively rehabilitate the abandoned Cullen Main West opencut mine while concurrently recover approximately 550 000t of the coal exposed during therehabilitation process. This coal will be mined and crushed on site at a rate of 300 000t perannum and despatched via the Castlereagh Highway to Mt Piper and Wallerawang PowerStations, Western Main Colliery and the Lidsdale Siding for export. The Ivanhoe NorthRehabilitation Project will take approximately two years to complete.

This Revised Surface Water Management Plan (RSWMP) describes the management ofsurface water at the Ivanhoe North Rehabilitation Project (Ivanhoe North).

Operational Management of WaterChapters 2 to 6 of the RSWMP outline the current water management practices in place atIvanhoe North to address the previously defined hazards and risks and include considerationof:

The objectives of the Environment Protection Licence No. 13063 (EPL 13063);

The requirements of Ivanhoe Coal;

Current operational practice at Ivanhoe North; and

How revision of water management practices at Ivanhoe North will be addressed.

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Ivanhoe North Rehabilitation Project

RSWMP Revision 3: Chapter 1 – Introduction 1-1

1. Introduction

This chapter provides a broad overview of the history of Ivanhoe North, the coal handlingprocess and the role of water management within that coal handling process.

1.1 ScopeWater management is an important aspect of the environmental management program forIvanhoe North. Ivanhoe North has developed a Surface Water Management Plan (SWMP) forthe operations at the Ivanhoe North Rehabilitation Project in accordance with the projectapproval conditions (PA 05_0103) issued by the Department of Planning (DoP) on 11 April2007 as provided in Appendix A (development consent).

Ivanhoe North considers this SWMP to be a living document that (while complete at the dateof issue or revision) may require amendment following consultation with regulatory authorities,variation to on-site conditions, operational need, identification of environmental change, or forreasons of continual improvement. A list of documents referenced in the revision of thisRSWMP is provided in Appendix I with a history of the document provided in Appendix H.

1.2 Objectives of this ReportThe overall objectives of this RSWMP are to manage water at the Ivanhoe NorthRehabilitation Project (see Figure 1.1 Locality Plan) and satisfy statutory requirements,particularly with respect to safety and the environment.

The safety objectives are to provide a working environment that meets the statutoryrequirements of the Coal Mines Health and Safety Act 2002 (NSW), the Occupational Healthand Safety Act 2000 (NSW) and associated Regulations and to improve public safety withremoval of the unsafe high walls.

The environmental objectives are to manage water at Ivanhoe North in such a manner so asto comply with Project Approval PA 05_0103, the Water Management Act 2000 (NSW), theWater Act 1912 (NSW), the Dams Safety Act 1978 (NSW), the Protection of the EnvironmentOperations Act 1997 (NSW), EPL 13063 and more specifically to:

Maximise the separation of clean and dirty water systems;

Manage water discharge from the site, in terms of volume and quality, to a level thatis acceptable for environmental management and community expectations;

Minimise water discharges from the premises by maximising, where practicable,opportunities for the reuse and recycling of water on site;

Minimise erosion and sedimentation from all active and rehabilitated areas on site;

Minimise discharges of dirty water from the premises;

Monitor the effectiveness of surface water controls, and

Manage discharge to natural waterways in accordance with the EPL 13063 conditionsor as agreed with the DECCW.

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Ivanhoe North Rehabilitation Project

RSWMP Revision 3: Chapter 1 – Introduction 1-2

Figure 1.1 Locality Plan

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Ivanhoe North Rehabilitation Project

RSWMP Revision 3: Chapter 2 - Site Overview 2-1

2. Site Overview

Ivanhoe North is located approximately 22 km northwest of Lithgow within the Ben BullenState Forest (Figure 1.1). The surrounding land uses include the Mount Piper andWallerawang power stations, coal mines, and agricultural uses. The closest residential area isthe village of Cullen Bullen, which is located about 3 km north of the site.

2.1 Naming Clarification“Ivanhoe” is often incorrectly used as a general term referring to several sites, namelyIvanhoe No.1 Colliery; Ivanhoe No.2 Colliery; Ivanhoe No.3; Ivanhoe No.4 and Ivanhoe North.The following provides clarification on each:

Ivanhoe No.1 Colliery – Old underground operation dating back to around 1893 whichclosed down in the 1950s. Located adjacent to the Pipers Float Dam near Portland.

Ivanhoe No.2 Colliery – Located on Boulder Road opposite the Mt Piper Power Station.It is often referred to as Ivanhoe or Ivanhoe Colliery, but the correct naming is IvanhoeNo.2 Colliery. Mining started in the 1940s and was put into ‘care and maintenance’ in2005.

Ivanhoe No.3 – Minor underground operation in the 1950’s.

Ivanhoe No.4 – Old small box-cut mining area. Mined coal was trucked to Ivanhoe No.2Colliery.

Ivanhoe North – The subject site of this RSWMP. Ivanhoe North is located about 2 kmnorth of Ivanhoe No.2 Colliery. It is an old underground and open-cut mine. Historically theopen-cut mine was referred to as the Cullen Main West open cut. Mining started afterWorld War II and was abandoned in the 1950s. Currently coal left between the oldunderground and open-cut workings are being mined by open-cut methods as part of theIvanhoe North Rehabilitation Project. Mining will continue for approximately two years.

2.2 Project HistoryMining within the Ivanhoe North lease area commenced after World War II and wasabandoned in the 1950s. Historical mining consisted of both open-cut (Cullen Main West) andunderground (Ivanhoe No.2 Colliery) operations.

The Cullen Main West open cut mine was a 13.4 ha contour mining operation, whichoperated shortly after World War II until early 1953, when the pit was abandoned.

The Ivanhoe No.2 Colliery undertook further mining of the seams, to within approximately50 m of the abandoned highwall of the Cullen Main West mine, by bord and pillar methods.

The two mining operations left a remnant coal resource between the open cut andunderground workings.

Approximately 11.4 ha of the former open-cut mine remain as it was when abandoned andcomprises of the open-cut floor (see Figure 2.1 – shown in orange) and out-of-pit spoil dumps(shown in green). There has been some good vegetative regrowth on the out-of-pit spoildumps, but the high wall and open cut floor remain largely devoid of significant vegetation.

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Ivanhoe North Rehabilitation Project

RSWMP Revision 3: Chapter 2 - Site Overview 2-2

No current operator has any rehabilitation obligation with respect to the entirety of thisabandoned mine. Ivanhoe Coal holds a surface lease, Mining Purposes Lease 79 (MPL79),over approximately 20% of the abandoned Cullen Main West open cut which has been usedfor the installation of mine ventilation and placement of coal rejects for the Ivanhoe No.2Colliery, and therefore has an obligation to rehabilitate that section of the abandoned CullenMain West open cut. The remaining 80% (11.4 ha) of the former open cut is considered aderelict mine and rehabilitation obligations lie with the NSW government.

Operations in the Lithgow Seam at Ivanhoe No.2 Colliery ceased in 2004. As a result theopportunity arose to commence rehabilitation of the abandoned high walls and open cut floorof the Cullen Main West open cut, whilst rehabilitation equipment was available within thelocal area.

The rehabilitation would have had to be under the auspices of the Department of PrimaryIndustries (DPI) “Derelict Mines Program”, however, in order to avoid the necessity for fundingfrom the DPI (MR), Ivanhoe Coal proposed to finance the rehabilitation works through therecovery of approximately 550 000 t of the remnant coal left between the high wall and theIvanhoe Colliery No. 2 underground workings.

2.3 Current Project DescriptionThe primary objectives of the Ivanhoe North Rehabilitation Project are to rehabilitate theabandoned Cullen Main West open cut and concurrently recover approximately 550,000 t ofcoal exposed during this process through the following activities:

Construction of a site entrance on the Castlereagh Highway and the upgrading of anexisting access road to the area of the proposed activities.

Establishment of a coal crushing area. The coal crushing area covers an area ofapproximately 120m x 80m and is located within the partially backfilled void around theventilation entry of the Ivanhoe No. 2 Colliery underground workings. Overburden removedduring the initial coal recovery operation, supplemented with some of the coarse rejectcurrently stockpiled to the immediate west, were being placed in the void and shaped toaccommodate the various structures and equipment.

A project facilities area was constructed to the immediate west of the coal crushing areaon the existing coarse reject stockpile area and contain demountable style buildings forsite offices, first aid room, crib room and toilet/washing facilities. The facilities area alsoprovides parking for all employees’ light vehicles.

Construction of an internal haul road. An internal haul road was constructed along theexisting open cut floor to provide access for mobile equipment and haul trucks betweenthe coal crushing area and active coal recovery and rehabilitation activities. The roadfollows the alignment of the existing out-of-pit spoil dumps, thereby providing the maximumdistance from the high wall, avoiding disturbance to the established vegetation on thesespoil dumps and providing a degree of noise attenuation. Coarse reject from the on-sitereject emplacement were used to construct the road which is approximately 6m wide.

Progressive shaping and rehabilitation of the former open cut area through the stagedremoval and placement of overburden materials. The overburden would be obtained from

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Ivanhoe North Rehabilitation Project

RSWMP Revision 3: Chapter 2 - Site Overview 2-3

between the high wall of the former open cut and the recently abandoned undergroundworkings of Ivanhoe No.2 Colliery.

Development of a small coal recovery operation to remove the coal exposed by theprogressive removal and reshaping of overburden. The coal recovery area would recoveran estimated 550,000 t of coal at a rate of 300,000 t per annum.

On-site crushing and temporary stockpiling of the recovered coal within the defined coalcrushing area.

Transportation of the recovered and crushed coal via the Castlereagh Highway to MtPiper and Wallerawang Power Stations, Western Main Colliery and the Lidsdale Siding forrail transport to export markets. (EAP, May 2006)

2.4 Project SiteThe project site is best described by its component parts. These are presented on Figure 2.1and detailed as follows:

Out-of-Pit Spoil Dumps: Overburden, or spoil, removed by the former open cut wasplaced along the perimeter of the open cut floor over an area of approximately 5.3 ha. Thespoil was left at an angle of repose (between 45o and 60o) with some soil material spreadover the created landform.

Abandoned high wall: Developed along the contours of the gentle to moderate slopesof the site, the high wall varies in height from approximately 2 m in some sections togreater than 12 m in others.

Open Cut Floor: Varying between less than 5 m to almost 20 m in width, the open cutfloor has created a slight depression in the landscape between the high wall and the out-of-pit spoil dumps. This depression has created several water storages with severalartificial drainage lines created to allow the escape of this water.

Ivanhoe No.2 Colliery Ventilation Entry: The former ventilation entry for theunderground mining operation for Ivanhoe Colliery No.2 remains adjacent to a section ofremnant high wall near the north-eastern corner of the former open cut.

Coarse Reject Emplacement: Elevated plateau covering an area of approximately3.2 ha with a steep slope of greater than 70o created by the placement of coarse rejectfrom the Ivanhoe No.2 and Invincible Collieries against the abandoned high wall.

Constructed Diversion Works: Above the high wall a diversion drain exits (presumablyto channel surface water away from the open cut).

Surface Water Drainage: Four natural drainage lines traverse the existing open cut.They are designated as Stream 1, Stream 2, Stream 3 and Stream 4. Refer Figure 2.1.

The remainder of the Ivanhoe North site comprises a comparatively well vegetated eucalyptwoodland over gentle to moderate slopes. There is a relatively thin topsoil and subsoil layerover a competent conglomerate base rock. (EAP, May 2006)

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Ivanhoe North Rehabilitation Project

RSWMP Revision 3: Chapter 2 - Site Overview 2-4

Figure 2.1 Project Site

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Ivanhoe North Rehabilitation Project

RSWMP Revision 3: Chapter 2 - Site Overview 2-5

2.5 Coal Production ProcessThe coal production process at Ivanhoe North comprises extraction, transfer to surfacestorage facilities, processing and transportation off site as shown in the schematic provided inFigure 2.2

Four coal seams containing recoverable coal are present at increasing depth on site, namelyMiddle Irondale, Lidsdale, Lower Irondale and Lithgow. Figure 2.3 presents a representativecross-section through the Ivanhoe North site showing the typical seam and interburdenthicknesses. Approximately 550 000t of coal can be recovered within the four coal seams.

Overburden Removal and Replacement MethodsOverburden would be removed by one of the two following methods.

Bulldozer Push: involving the ripping of the material by bulldozer and the pushing of theripped material to a completed section of the block, and/or

Load and Haul: involving ripping by bulldozer with the ripped material loaded into haultrucks.

The same equipment is used for both overburden removal and the recovery andtransportation of coal. As such, overburden removal would not be undertaken every day.

Coal RecoveryThe exposed coal seams are ripped by bulldozer or the bucket of the excavator and loadedinto haul trucks for delivery to the ROM coal stockpile within the coal crushing area.

Coal Crushing and StockpilingThe coal crushing area has been designed and located to minimise noise impact at thenearest residences. ROM coal is transported between the active coal recovery area and thecoal crushing area typically in haul trucks travelling along the designated internal haul road(see Figure 2.1). The ROM coal is unloaded and temporarily stockpiled on a ROM pad instockpile(s).

Coal stockpiled within the ROM coal stockpile is loaded into a crusher. Crushed coal is thendirected by a stacker to one of two crushed product stockpiles to await despatch. The twoproduct stockpiles are maintained to segregate the lower ash product and the higher ashproduct.

Coal Reject ManagementProcessing Reject: No processing reject.

Existing Stockpiled Reject: An estimated 40,000 m3 of coal reject has previously beenstockpiled within the existing coarse reject emplacement of MPL 79. This reject is typicallycoarse (up to 75 mm), comprised predominantly of carbonaceous shale and sandstoneand has a low potential for acid and salt generation. Ivanhoe North intends to relocate thebulk of this material into the voids within the northern mining blocks towards the end of the

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Ivanhoe North Rehabilitation Project

RSWMP Revision 3: Chapter 2 - Site Overview 2-6

project life, thus rehabilitating the existing reject emplacement area and leaving a finallandform consistent with the surrounding topography.

Product TransportationCrushed coal from the product stockpiles is loaded by front-end loader and despatched offsite using highway trucks to either the Mt Piper or Wallerawang Power Stations or theWestern Main Colliery and Lidsdale Siding.

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Ivanhoe North Rehabilitation Project

RSWMP Revision 3: Chapter 2 - Site Overview 2-7

Figure 2.2 Coal Processing Diagram

Coalcrushing

Stockpile Stockpile

Mining ofHighwall Internal

Haulage ExternalHaulage

Figure 2.3 In-situ Coal Seams

Lidsdale Seam (1.5m)

Lithgow Seam (3.6m)

Lower Irondale Seam (2.5m)

Middle Irondale Seam (0.5m)

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Ivanhoe North Rehabilitation Project

RSWMP Revision 3: Chapter 2 - Site Overview 2-8

2.6 Water Management SystemThe water management system required to support the operations at Ivanhoe North involvessurface water only and includes a number of surface storages. Location of these surfacestorages are shown on Figure 2.4. The system is designed to separate ‘clean’ and ‘dirty’runoff in order to maximise clean water runoff, minimise dirty water discharge and maximisethe re-use of water.

2.7 Water Management StructuresWater management structures at Ivanhoe North consist of Clean Water Dams (CWD),Sediment Dams (SD) and a number of diversion drains. Table 2.1 details these structures:

Table 2.1 Water Management Structures

Name Location Constructed Capacity (ML)

CWD-1 Upper reaches of Stream 1 0.4 ML

CWD-2 Upper reaches of Stream 2 0.5 ML

CWD-3 Upper reaches of Stream 3 0.8 ML

CWD-4 Upper reaches of Stream 4 Diversion Drain(Refer to Section 4.4 for details)

SD-1 On Stream 3, D/S of site.Also known as Lilly’s Dam

2.4 ML

SD-2 On Tributary of Stream 1 (notconstructed yet at the time of thisreport, Revision 1)

Refer to Section 5.3for details

SD-3 Downstream of the Coal CrushingArea

0.25 ML

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Ivanhoe North Rehabilitation Project

RSWMP Revision 3: Chapter 2 - Site Overview 2-9

Figure 2.4 Surface Storages Plan

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Ivanhoe North Rehabilitation Project

RSWMP Revision 3: Chapter 3 – Surface Water Management 3-1

3. Surface Water Management

The surface water management system at Ivanhoe North comprises surface water diversionsin conjunction with a number of surface storages. This chapter provides a broad outline of thecomponents of the surface water system and includes schematic diagrams for clarification.Further detail on the function of the components within each system is provided insubsequent chapters.

3.1 Surface Water SystemThe surface water storages at Ivanhoe North are as follows (see Figure 2.4 for location plan):

Clean Water Dams Sediment (Dirty Water) Dams

Clean Water Dam No.1 (CWD-1)

Clean Water Dam No.2 (CWD-2)

Clean Water Dam No.3 (CWD-3)

Clean Water Dam No.4 (CWD-4)

Sediment Dam No.1 (SD-1) or Lilly’s Dam

Sediment Dam No.2 (SD-2)

Sediment Dam No.3 (SD-3)

Figure 3.1 provides a schematic of the overall inputs and outputs from this system.

InputsThe inputs into the surface water system consist of runoff from the contributing catchmentareas (both clean and dirty) as a direct result of rainfall events.

Ivanhoe North manages the:

Interception and diversion of clean water from the undisturbed catchments; and

Capture of dirty water from the disturbed areas.

OutputsThe outlet locations from the surface water system are:

EPL Monitoring Point No.1 (IW-7)- Overflow from Sediment Dam SD-1 into Stream 3;

EPL Monitoring Point No.2 (IW-8) - Overflow from Sediment Dam SD-2 into Stream 1;

Overflow from Sediment Dam SD-3 into Stream 1; and

Clean water diverted via Clean Water Dam CWD-4 back into Stream 4;

EPL 13063 limits the volume of water to be discharged from the surface water system to 2 MLper day through EPL Monitoring Points 1 & 2 respectively, i.e. 4 ML per day site total.

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Ivanhoe North Rehabilitation Project

RSWMP Revision 3: Chapter 3 – Surface Water Management 3-2

Figure 3.1 Surface Water Management Schematic

LIMIT OF DISTURBANCE

LIMIT OF DISTURBANCE

CWD-1

Clean WaterRunoff fromCatchment

No.1

Dirty CatchmentRunoff

SD-2A

LargeEvent

OverflowDust Suppression

CWD-2

Clean WaterRunoff fromCatchment

No.2

Dirty CatchmentRunoff

In-pitSump

LargeEvent

OverflowDust Suppression

CWD-3

Clean WaterRunoff fromCatchment

No.3

Dirty CatchmentRunoff

In-pitSump

LargeEvent

OverflowDust Suppression

Clean WaterRunoff fromCatchment

No.4

Dirty CatchmentRunoff

In-pitSump

AllCaptured

Flows

SD-2B

Large Event Overflow

LargeEvent

Overflow

Stre

am1

Stre

am3

Stre

am4

LargeEvent

Overflow

SD-1

Dust Suppression

Dust Suppression

Dust Suppression

Dust Suppression

CWD-4

Coal Crushing Area

SD-3

Large Event Overflow

Dirty Water Transfer Dirty Water Transfer

Dirty WaterTransfer

Dust Suppression

Dust Suppression

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Ivanhoe North Rehabilitation Project

RSWMP Revision 3: Chapter 4 - Clean Water Runoff 4-1

4. Clean Water Runoff

One of the environmental objectives of the RSWMP is to maximise the separation of cleanand dirty water systems. This chapter summarises:

How the clean catchment runoff is separated from dirty catchment areas; and

How the clean water system components are operated within the overall watermanagement system.

The rate at which water is transferred through the water management system has beenaddressed in the Water Balance provided in Section 11.

4.1 Potable & Ablutions WaterPotable water at Ivanhoe North is supplied from bottled water. Ablutions water is suppliedfrom collected rainwater.

4.2 Ivanhoe North Clean Water CatchmentsIvanhoe North has four natural ephemeral streams flowing through the site area. They aredesignated as Streams 1, 2, 3 & 4 and depicted in Figure 4.6. The catchment areas upstreamof the mining disturbance area constitute the clean water catchments of Ivanhoe North. Figure4.6 indicates the location of the clean water catchments with details as follows:

Clean Water Catchment Area No.1 – Upper reaches of Stream No.1 and upstream ofCWD-1. Approximate catchment area = 8 ha.

Clean Water Catchment Area No.2 – Upper reaches of Stream No.2 and upstream ofCWD-2. Approximate catchment area = 5 ha.

Clean Water Catchment Area No.3 – Upper reaches of Stream No.3 and upstream ofCWD-3. Approximate catchment area = 13 ha.

Clean Water Catchment Area No.4 – Upper reaches of Stream No.4 and upstream ofCWD-4. Approximate catchment area = 3 ha.

4.3 External Clean Water CatchmentsIvanhoe North receives water discharged from a culvert crossing underneath the CastlereaghHighway. The culvert collects rainfall runoff from the highway and contributing catchment tothe east of the highway and discharges onto the Ivanhoe North site, causing erosion on site(Figure 4.1).

Ivanhoe North has placed a number of hale bales and sediment fences along the drainagepath to limit the amount of eroded sediment entering the site and discharging downstream.However these measures are only effective for smaller rainfall events.

Discharges from larger events have created a scour hole within the drainage path as shownin Figure 4.1. The source of this problem is external to Ivanhoe North and not related to themining or rehabilitation works. It will continue to cause erosion on site, even after the

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RSWMP Revision 3: Chapter 4 - Clean Water Runoff 4-2

rehabilitation works are complete, therefore a more permanent solution to the scouring isrecommended. Possible mitigation works are provided in Appendix E.

Figure 4.1 Culvert across Castlereagh Highway and scour hole

Water Quality of Highway Discharge WaterDirty Water from a mining perspective is classified as water on the premises that has comeinto physical contact with coal, mined carbonaceous materials or otherwise contains anelevated sediment load and therefore the discharge from the highway culvert was classifiedunder ‘Clean Water’.

However, it is important to highlight that any discharge from the Castlereagh Highway will becontaminated to a degree and is a potential source of contamination for Ivanhoe North.Highway runoff typically contains dirt & dust, rubber & metal deposits from tire wear, oils &grease, hydrocarbons, heavy metals from exhausts, worn tires, engine parts and brakelinings, and larger gross pollutants (cans, bottles, bags, cigarettes, cups, etc) as a result oflittering.

Culvert Headwall

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RSWMP Revision 3: Chapter 4 - Clean Water Runoff 4-3

4.4 Clean Water DamsClean water dams were constructed immediately upstream of the mining blocks, prior to thestart of the mining activities, to capture rainfall runoff from the clean water catchments. Theclean water dams at Ivanhoe North are shown in Figure 4.6. The dams were constructed inaccordance with the typical design for “Earth Basin – Wet SD 6-4” provided in the ‘Blue Book’and shown in Appendix D

The dams have been designed to capture the 80th percentile, 5 day rainfall event (consistentwith the criteria used for sediment dams), which is deemed appropriate, given the short twoyear project life, and each coal recovery block typically being disturbed for only one to threemonths.

Dam capacities were calculated according to the ‘Blue Book’ assuming clean catchments andhence do not require a sediment storage volume. Capacity calculations using the ‘Blue Book’standard calculation spreadsheet are provided in Appendix C.

Should a clean water dam reach capacity in a high rainfall event, the water will overflow intothe mine workings from where it is pumped to the sediment dams or used for dustsuppression, depending on the location and severity of the overflow.

Upon completion of the mining and rehabilitation works, and the successful re-establishmentand stabilisation of the final landform, the clean water dams will be decommissioned and theoriginal stream landform reinstated.

The current lease holder and land owner has requested that these dams be retained. This willrequire further investigation and approval and falls outside the scope and purpose of thisreport.

The following sections describe the four clean water dams at Ivanhoe North in more detail.

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RSWMP Revision 3: Chapter 4 - Clean Water Runoff 4-4

Clean Water Dam No.1 (CWD-1)The embankment and associated overflow weir that form CWD-1 were constructed onStream 1 just upstream of northern mining block Nth-04. The main inflows to CWD-1 arerainfall-runoff from Clean Water Catchment Area 1 (8 ha).

‘Blue Book’ required storage capacity for CWD-1 is 0.4 ML. As part of the AnnualEnvironmental Management Report (AEMR) for Ivanhoe North, a detailed survey of the sitewas conducted in March 2010. The survey indicates that the current storage capacity of thedam between 938.6 mAHD - 940.7 mAHD is 0.422 ML.

In high rainfall events, water will overflow at the eastern corner of the dam and continuedownstream and back into Stream 1. Once mining blocks Nth-03 and Nth-04 become active,water will overflow into the mine workings from where it is pumped to the sediment dams orused for dust suppression.

Water captured in CWD-1 is used for dust suppression on site when the supply from thesediment dams and sumps fail.

Figure 4.2 Clean Water Dam No.1

Overflow

CWD-1

Inflow fromDiversion Drain

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Clean Water Dam No.2 (CWD-2)CWD-2 is constructed on Stream 2, just upstream of central mining block Cen-05. The maininflows to CWD-2 are discharges from Clean Water Catchment Area 2 (5 ha).

The dam has two diversion drains entering from the north and south side respectively,creating additional storage capacity. ‘Blue Book’ required storage capacity is 0.24 ML. Thecurrent AEMR survey shows a storage capacity for the dam and diversion drains of 0.514 MLbetween 935.8 mAHD and 938.0 mAHD.

In high rainfall events, water will overflow into the mine workings from where it is pumped tothe sediment dams or used for dust suppression.

Water captured in CWD-2 is used for dust suppression on site when the supply from thesediment dams and sumps fail.

Figure 4.3 Clean Water Dam No.2

DiversionDrain Nth

DiversionDrain Sth

CWD-2

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RSWMP Revision 3: Chapter 4 - Clean Water Runoff 4-6

Clean Water Dam No.3 (CWD-3)

The embankment and associated overflow weir that form CWD-3 were constructed onStream 3, just upstream of southern mining block Sth-10. The main inflows to CWD-3 aredischarges from Clean Water Catchment Area 3 (13 ha).

‘Blue Book’ required storage capacity is 0.6 ML. The current AEMR survey shows a storagecapacity for the dam of 0.8 ML between 933.8 mAHD and 932.3 mAHD.

In high rainfall events, water will overflow into the mine workings from where it is pumped tothe sediment dams or used for dust suppression.

Water captured in CWD-3 is used for dust suppression on site when the supply from thesediment dams and sumps fail.

Figure 4.4 Clean Water Dam No.3

Overflow

DiversionDrain

CWD-3

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Clean Water Dam No.4 (CWD-4)CWD-4 is constructed on Stream 4, upstream of southern mining block Sth-02. The IvanhoeNorth SWMP recommended the construction of a 15m x 15m x 2m deep dam to capture theclean water runoff from Clean Water Catchment No.4. Further investigation into the upstreamcatchment characteristics (steepness and small size of only 3 ha) and the stability of themining high wall immediately downstream of the proposed clean water dam, lead to theconclusion that a diversion drain around the disturbed mining area would be a moreappropriate surface water management measure than a clean water dam.

Consequently Ivanhoe North constructed a diversion drain capturing runoff from Clean WaterCatchment No.4 (3 ha) and diverting it around the disturbed mining area, through a hay balefilter, back into Stream 4 downstream of the disturbed area.

For consistency of reporting, this diversion drain will still be referred to as Clean Water DamNo.4 (CWD-4).

Figure 4.5 Clean Water Dam No.4

4.5 Clean Water Diversion DrainsWithin the Ivanhoe North site area there are a number of diversion drains in the form ofcontour drains that enable the interception of clean water runoff before it enters thedisturbance area (see Figure 4.6). The drains direct the intercepted clean water to the CleanWater Dams. Upon completion of the mining and rehabilitation works, and the successful re-establishment and stabilisation of the final landform, the diversion drains (along with the cleanwater dams) will be decommissioned and the original stream landform reinstated.

The diversion drains were constructed in accordance with the typical design for “Earth Bank –Low Flow SD 5-5” provided in the ‘Blue Book’, and shown in Appendix D.

Inflow point fromU/S catchment

Diversion Drain(CWD-4)

CWD-4

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RSWMP Revision 3: Chapter 4 - Clean Water Runoff 4-8

Figure 4.6 Clean Water System

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Ivanhoe North Rehabilitation Project

RSWMP Revision 3: Chapter 5 – Minimisation of Dirty Water Discharge 5-1

5. Minimisation of Dirty Water Discharge

A further objective of the RSWMP is the minimisation of dirty water discharge.

This chapter summarises how the water management system manages dirty water withinIvanhoe North and includes:

A description of dirty water surface diversions;

A description of the dirty catchment areas;

The storages to which dirty catchment areas are directed; and

How these storages are managed within the water management system.

The rate at which water is transferred through the water management system has beenaddressed in the Water Balance provided in Section 11.

5.1 Dirty Water Catchment AreasThe dirty catchment areas within Ivanhoe North are shown on Figure 5.4 and described in thefollowing sections of this chapter.

Facilities Area and BuildingsThe facilities area is a relatively small area of 0.7 ha. As such, water collected from thegravelled parking of the main office, bathhouse, cribshed and workshop complex do notrequire large sediment control structures. Temporary sediment and erosion control devicessuch as sediment fencing and straw bale sediment filters is sufficient for this area. Rainfallrunoff collected from the roofs of the above buildings is stored in rainwater tanks and used tosupply the ablutions block.

Coal Crushing AreaRunoff from stockpiles and conveyors in this area is directed to dish drains along the edge ofthe coal crushing platform. These drains flow to Sediment Dam No.3. The total coal crushingcatchment area is 2.1 ha.

Runoff from Internal Haul RoadDuring prolonged periods of dry weather the coal haulage road has the potential to becomecovered with a considerable amount of dust. Therefore runoff during rain events, or from dustsuppression operations, is considered to be dirty. This runoff is directed by dish drains on thedownstream side of the road to Sediment Dam No. 1 and/or in-pit sumps on the mine floor.

Open Cut Mining BlocksMinor surface drainage works will be used in combination with the grading of the pit floor toconvey dirty water to in-pit sumps, to be located within the disturbance area. The in-pit sumpsand internal pit storages will be large enough to act as a sediment trap and allow for some

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RSWMP Revision 3: Chapter 5 – Minimisation of Dirty Water Discharge 5-2

initial settlement of the dirty water. Dirty water catchments Nos 2 and 4 drains to the in-pitsumps and has catchment areas of 2.7 and 4.5 ha respectively. The in-pit sumps utilise theexisting ponds which have formed on the floor of the old Cullen Main West open cut at naturallow points.

Water accumulating in the in-pit sumps will be periodically transferred to the sediment damsto allow treatment of the dirty water prior to discharge from site. Water will typically betransferred to the sediment dams via pumped, or gravity flow, within temporary pipe.However, where practical water may be transferred using water carts or surface flow inconstructed drainage channels.

Under extreme rainfall events that exceed the design criteria of sediment dams, excess waterwill be contained within the pit area until it can be transferred to the out-of-pit sediment dams.Water contained in-pit in these circumstances is likely to impact on the mining operation suchthat mining may be ceased until water can be transferred to the out-of-pit sediment dams. Inthis way the site water management prevents the uncontrolled discharge of dirty water fromsite in all but the most extreme rainfall events.

5.2 Dirty Water Surface DiversionsTo prevent dirty water entering clean water runoff areas and natural waterways, a number ofdiversion control structures are in place as indicated on Figure 2.4

The dirty water diversion measures implemented include:

Drive in sediment sumps;

Perimeter drains;

Contour drains to divert water to sediment dams;

Low level levee banks around the coal haulage road.

5.3 Dirty Water Surface StoragesThe capacity of the dirty water dams has been calculated in accordance with the ‘Blue Book’and to store runoff from an 80th percentile, 5 Day rainfall event allowing sufficient settlementtime for Type D soils (see Appendix C). This sizing allows the full sediment dam capacity tobe treated (settlement and/or flocculation) and discharged within 5 days of the dam beingfilled.

The water level within surface dirty water dams is maintained at the initial storage volumewhenever possible and these structures are de-silted on an “as required” basis.

The function of these dirty water dams is to either:

Retain dirty water and increase the resonance time for the water to improve its quality towithin its limits to be discharged; or

Receive water that is transferred from another smaller sump/dam to prevent discharge ofdirty water into the environment.

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RSWMP Revision 3: Chapter 5 – Minimisation of Dirty Water Discharge 5-3

Sediment Dam No.1 (SD-1)Sediment Dam No.1 receives dirty catchment rainfall runoff from the mining operations andthe internal haul road. It also receives rainfall runoff from the old out of spit spoil dump andvegetated catchment area between the spoil dump and the basin.

The main inflows to SD-1 are rainfall runoff from dirty catchments Nos. 1 (5.5 ha) and 3 (3.1ha) and transferred dirty water from the in pit sumps (which capture rainfall runoff from dirtycatchments Nos. 2 and 4 (2.7 ha and 4.5 ha respectively). Refer to Figure 5.4 for catchmentlocations and areas.

‘Blue Book’ required storage capacity is 2.21 ML. The current AEMR survey shows a storagecapacity for the dam of 2.4 ML between 901.0 mAHD and 904.8 mAHD.

In high rainfall events, water will overflow into Stream 3. Under EPL-13063 the maximumpermissible discharge from SD-1 is 2 ML/day.

Water captured in SD-1 is used for dust suppression on site.

Figure 5.1 Sediment Dam No.1

D/S slope of the oldout of pit spoil dump

SD-1

Overflow

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RSWMP Revision 3: Chapter 5 – Minimisation of Dirty Water Discharge 5-4

Sediment Dam No.2 (SD-2)SD-2 has not yet been constructed at the time of this RSWMP. Close inspection of the sitetopography during a site visit on 12 February 2010 by Centennial Coal and GHD, revealedthat it would be more practical if the original proposed Sediment Dam No.2 be split into twosediment dams to suit the existing ground topography and drainage paths.

The two dams will be located as shown on Figure 5.4 with the main dam (SD-2A) locatedcloser to the Castlereagh Highway than the original proposed position and with the secondarydam (SD-2B) constructed next to the site entrance road at the first road junction.

SD-2A: SD-2A will capture rainfall runoff from dirty water catchment no.8 (5.4 ha). Thenorthern mining blocks fall within this catchment area. ‘Blue Book’ required storage capacity is1.2 ML.

In high rainfall events, water will overflow into SD-2B further downstream, and eventually backinto Stream 1. Under EPL-13063 the maximum permissible discharge from SD-2A is2 ML/day. Water captured in SD-2A will be used for dust suppression on site.

SD-2B: Once SD-2A is constructed, the catchment discharging to the proposed SD-2B willbe undisturbed land, apart from the internal haul road. However, for the purpose of sizing thedam, it was assumed that the contributing catchment will be disturbed. The main inflows intoSD-2B will thus be rainfall runoff from dirty catchment no.9 (2.4 ha). ‘Blue Book’ requiredstorage capacity, assuming disturbed area, is 0.5 ML.

In high rainfall events, water will overflow into Stream 1. As SD-2B will capture any overflowfrom SD-2A, it is reasonable to assume that under EPL-13063 the maximum permissibledischarge from SD-2B is 2 ML/day, i.e. the total discharge downstream of SD-2A should notexceed 2 ML/day. Water captured in SD-2B will be used for dust suppression on site.

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RSWMP Revision 3: Chapter 5 – Minimisation of Dirty Water Discharge 5-5

Sediment Dam No.3 (SD-3)Sediment Dam No.3 receives dirty catchment runoff from the coal crushing area and part ofthe internal haul road.

The main inflows to SD-3 is rainfall runoff from dirty catchment No.7 (2.1 ha). ‘Blue Book’required storage capacity is 0.45 ML. The current AEMR survey shows a storage capacity forthe dam of 1 ML between 910.9 mAHD and 913.5 mAHD.

Figure 5.2 Sediment Dam No.3

No discharges from SD-3 are currently permitted, hence SD-3 is the main supply dam for dustsuppression on site, and has not experienced any overflows since commencement of theworks. However, in high rainfall events, water will overflow into Stream 1, via a culvertunderneath the internal haul road. A sediment filter (hay bales) has been placed in front of theculvert entrance to minimise sediment from being transferred into Stream 1.

Water captured in SD-3 is used for dust suppression on site.

Inlet capturing runofffrom internal haul road

SD-3

Overflow

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RSWMP Revision 3: Chapter 5 – Minimisation of Dirty Water Discharge 5-6

‘First Flush’ Sediment TrapsThere are a number of silt traps at the natural low points along the internal haul road to trapinitial runoff and to enable easy re-use of dirty water for dust suppression. Contour and dishdrains direct water along the old out of pit spoil towards Sediment Dam No. 1.

A first flush sediment pond was constructed upstream of Sediment Dam No.1 to trap coarsesediment that washes off the side slope of the old out of pit spoil dumps and the internal haulroad.

Figure 5.3 ‘First Flush’ Sediment Pond

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RSWMP Revision 3: Chapter 5 – Minimisation of Dirty Water Discharge 5-7

Figure 5.4 Dirty Water System

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Ivanhoe North Rehabilitation Project

RSWMP Revision 3: Chapter 6 – Maximisation of Water Recirculation 6-1

6. Maximisation of Water Recirculation

The maximising of water recirculation at Ivanhoe North is also an objective of the RSWMP.Maximisation of the recirculation of water aims to decrease the volume of water within thewater management system.

This chapter summarises how water recirculation is applied at Ivanhoe North.

Dust SuppressionWhen considering the water available for re-use from surface water runoff, it is important torecognise that every property has a Maximum Harvestable Rights Dams Capacity (MHRDC).The MHRDC represents the maximum amount of clean water that can be used on-site withoutrequiring a license.

The MHRDC for a property (taken in this case to be the mining lease for the project given thelocation of the project within Ben Bullen State Forest), introduced as part of the DWE (nowNSW Office of Water, in DECCW) Farm Dams Policy in 1999, entitles a landholder to captureup to 10% of the rainfall and runoff from the property and use it for any purpose withoutrequiring a license for the dam(s).

The MHRDC for a property is calculated by multiplying the area of the landholding by amultiplier factor based on annual rainfall and habitation for an area (DIPNR, 1999). Themining lease is located in a zone where the multiplier factor is 0.08 (see the following websitewww.farmdamscalculator.dnr.nsw.gov.au/cgi-bin/ws_postcode.epl).

Notably, sediment dams or other sediment or pollution control structures are exempt from theMHRDC consideration.

The mining lease covers approximately 79.8 ha and therefore the MHRDC is approximatelyas follows. MHRDC = Catchment Area (ha) x Multiplier Value

= 79.8 ha x 0.08

= 6.4 ML/yr

Given the maximum capacity of the up-slope clean water dams is approximately 1.2 ML, anyuse of the clean water from up-slope areas of the project would not exceed the MHRDC of6.4 ML/yr.

Clean water rainfall runoff captured in the clean water dams may thus be used for dustsuppression on site.

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RSWMP Revision 3: Chapter 7 – Development Consent Conditions 7-1

7. Development Consent Conditions

The Ivanhoe North development consent specifies that there is an obligation on IvanhoeNorth to prevent and minimise harm to the environment throughout the life of the project. Thischapter outlines Ivanhoe North’s management strategies to prevent water pollution at, andfrom, the site in relation to specific development consent conditions.

Project Approval PA 05_0103 applies:

Schedule 3, Condition 7 Discharge LimitsThis RSWMP addresses the conditions within the development consent in Section 5.

Schedule 3, Condition 8 Site Water ManagementThe quality and quantity of water within the surface water system is managed within the cleanand dirty water systems detailed in Section 4 and 5. Monitoring of these systems is conductedon a regular basis by Ivanhoe North as outlined in Section 8.

Schedule 3, Condition 9 Site Water BalanceUpdated Site Water Balance is provided in Section 11.

Schedule 3, Condition 10 Erosion and Sediment ControlUpdated Erosion and Sediment Control Plan is provided in Section 12.

Schedule 3, Condition 11 Surface Water Monitoring PlanMonitoring of the clean and dirty water systems is conducted on a regular basis by IvanhoeNorth as outlined in Chapter 8.

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RSWMP Revision 3: Chapter 8 – Monitoring 8-1

8. Monitoring

This chapter outlines the monitoring procedures in place at Ivanhoe North for the watermanagement system.

8.1 InspectionsAt Ivanhoe North, various inspections are undertaken at regular intervals ranging from daily toquarterly.

Daily: The mining operator’s OCE inspects the following:

– All surface water storages on a daily basis to note water levels, water colour, sedimentbuild-up and general condition of the dams. These inspections then determine whichstorage feature will be used as water supply for dust suppression on site each day. Itwill also identify the need to source water from external sources, should supply fromthe Ivanhoe North storage features fail.

– Sediment fencing and filters (such as hay bales) to ensure they are functioningadequately;

– Site slope stability; and

– Internal roads for signs of erosion.

Fortnightly: The fortnightly review meeting includes an inspection of the above listedelements by the Centennial Coal Environmental Coordinator.

After Runoff Events: Site drainage and sediment control structures are inspectedregularly after runoff events (> 50 mm rainfall in 24 hours) to check for scouring ofdiversion drains and accumulation of materials in sediment traps and sediment dams.

RoadsThe internal roads will be visually inspected to ensure that the appropriate mitigationmeasures are functioning to convey the surface flows from the road and work areas withoutcausing erosion to the road or work areas on the adjacent land. Where significant erosion isobserved to be occurring on a regular basis, additional controls such as additional mitredrains, scour protection of road drainage, and re-grading of the road surface, will beimplemented.

Dams and Diversion WorksAny pipelines or waterways constructed to transfer water from these dams will be inspected toensure that there are no leaks, erosion or blockages to flow. Any signs of erosion at the pointsof discharge will be noted and remedial works undertaken as required. Where significanterosion is observed additional erosion controls will be constructed such as new rock scourprotection at the discharge locations.

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RSWMP Revision 3: Chapter 8 – Monitoring 8-2

Sediment ControlsAny sediment fencing and sand bag sediment filters will be inspected to ensure that they arefunctioning adequately. Where controls are observed to be not functioning correctly thecontrol will be restored to meet the required standard. Where significant erosion is observedto be occurring on a regular basis additional controls would be constructed generally inaccordance with the ”Blue Book” (see Section 4.3).

8.2 Surface Water Quantity and Quality MonitoringEnvironmental Protection Licence No 13063, Section 5 – Monitoring and recording conditionsrequires the monthly monitoring of water quality and the daily monitoring of water quantity (bymethod of calculation) at two locations:

Monitoring Point No.1 – Overflow from Sediment Dam No.1

Monitoring Point No.2 – Overflow from Sediment Dam No.2 (dam not yet constructed atthe time of this report)

However, Ivanhoe North also monitors water quality on a monthly basis at

Historical monitoring point INW-2

Sediment Dam No.3, and

Clean Water Dams CWD-1, CWD-2 and CWD-3

in accordance with the Updated Statement of Commitments (Appendix A). Figure 8.1indicates the location of these monitoring points.

Surface water quality monitoring is undertaken by an independent consultant with samplesbeing collected and provided to a NATA registered laboratory for analysis by that consultant.The independent consultant has to ensure that all sampling procedures and analyticalmethods are to be in accordance with EPL-13063 and the EPA publication "ApprovedMethods for the Sampling and Analysis of Water Pollutants in NSW” 2004, EPA.

Additional monitoring is to be undertaken when deemed necessary, when a rainfall eventresults in storage greater than the storage capacity of the dams and when water qualityresults indicate potential for discharge to exceed the water quality limits nominated inEPL 13063.

The analytes sampled are provided in Appendix G and the locations for samplings areprovided in Appendix F.

8.3 Management MeetingsDaily, fortnightly and monthly meetings are held with the management team to review anddiscuss the operations during the respective period. Any matters that are outside theparameters set down in this management plan and form a non-conformance are actioned tobring the management of water into compliance with the stated objectives of this plan.

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RSWMP Revision 3: Chapter 8 – Monitoring 8-3

8.4 ReportingWater management issues at the site are reported at the following frequency:

Daily: Site inspection log by the Mining Operator.

Fortnightly: Notes from fortnightly review meeting between the Mining Operator andCentennial Coal.

Monthly: Monthly Environmental Report to Centennial Coal detailing water quality datacollected.

Annual: Annual Environmental Management Report to DECCW;

Reporting is also undertaken in accordance with the applicable conditions within:

EPL 13063, Part 6; and

PA 05_0103, Schedule 4.

8.5 Document ControlOne controlled copy of the RSWMP is to be maintained and located in Ivanhoe North’s SiteOffice. An electronic copy of the Management Plan will be located on Lotus Notes under the“Management Plan” folder.

Changes to Associated DocumentsChanges or revisions to the documents or procedures are to be considered by a managementteam consisting of appropriate personnel.

Record KeepingInspections and monitoring data associated with the RSWMP will be located in IvanhoeNorth’s Site Office or on a Centennial Coal computer system.

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RSWMP Revision 3: Chapter 8 – Monitoring 8-4

Figure 8.1 Surface Water Monitoring Locations

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Ivanhoe North Rehabilitation Project

RSWMP Revision 3: Chapter 9 – Supervision 9-1

9. Supervision

This chapter summarises the roles and responsibilities of Ivanhoe North personnel inprotection of the environment through the application of the RSWMP.

9.1 InstructionAll employees and contractors involved with the construction and operation of Ivanhoe Northhave responsibility for protecting the environment. The specific responsibilities andprocedures are outlined in induction programs.

The overall management of water related issues including identifying the role of otherpersonnel and system overview are the responsibility of the Environmental Coordinator underthe direction of Ivanhoe North’s Mine Manager.

9.2 ResponsibilitiesFor members of the management team, there are varying responsibilities. These include:

Mine Manager:

– Manage operations and reporting undertaken in accordance with EPL 13063 andPA 05_0103;

– Manage operations in accordance with the objectives of the RSWMP; and

– Manage the resources available to site personnel to achieve the objectives of theRSWMP.

Environmental Coordinator:

– Assist the Mine Manager in complying with the requirements of EPL 13063 andPA 05_0103;

– Investigating opportunities for improvement in water management including re-use andreduction initiatives;

– Annual performance review for water management;

– Annual reporting to the DECCW on issues of water management;

– Regularly updating the RSWMP with additional relevant information, as it becomesavailable;

– Manage the relevant reporting, review and consultation conditions of the developmentconsent;

– Perform monthly environmental inspections and internal reporting; and

– Reporting of breaches and discharge events.

Mechanical and Electrical Engineers:

– Will maintain in a proper and efficient condition all required pumping systems; and

– Maintenance and calibration of monitoring equipment.

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Ivanhoe North Rehabilitation Project

RSWMP Revision 3: Chapter 9 – Supervision 9-2

Personnel:

– Will undertake operations in accordance with the objectives of the RSWMP.

Contractors:

– To ensure that operations are undertaken in accordance with the objectives of theRSWMP.

9.3 Communications and InformationCommunications and information relating to personnel engaged in the management of waterwill be conveyed by any of the following:

Briefings: Supervisors and individuals will be briefed on a shift basis on specific tasks tobe performed; and

Signage: Where it is deemed necessary relevant signage may be used as a form ofcommunication, which provides notification and instruction for water managementstructures and infrastructure.

9.4 TrainingPersonnel are provided with instruction and training to possess the necessary skills andknowledge to competently perform their allotted tasks and to be aware of the associatedhazards and risks to this management plan.

9.5 Environmental InductionEnvironmental awareness forms part of Ivanhoe North’s overall site induction system andongoing awareness training is delivered in the form of toolbox talks.

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Ivanhoe North Rehabilitation Project

RSWMP Revision 3: Chapter 10 – Revision 10-1

10. Revision

Ivanhoe North considers this RSWMP to be a living document that (while complete at the dateof issue or revision) may require amendment following consultation with regulatory authorities,variation to on-site conditions, operational need, identification of environmental change, or forreasons of continual improvement.

10.1 Audits and ReviewIvanhoe North management will audit/review the performance and/or compliance with thisRSWMP to identify any issues that may affect the integrity and effectiveness of this RSWMP.An audit/review should be undertaken on a periodic basis or as a result of:

A statutory requirement (eg. POEO Act, EPL 13063);

A regulatory authority request (eg. DECCW, DoP);

Environmental change, or significant event (eg. intense or prolonged rainfall events);

Significant discharge incident; and

Significant changes to water control structures.

The objectives of an audit/review would be to:

Maintain compliance with statutory requirements; and

To identify opportunities for improvement in the RSWMP.

If changes to this RSWMP are made, the following key personnel are, as a minimum, requiredto review the RSWMP before finalisation:

Mine Manager; and

Environmental Coordinator.

10.2 Revision TableA record of the issuing and re-issuing of the document, and revisions made to the RSWMPare set out in Appendix H.

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RSWMP Revision 3: Chapter 11 – Water Balance 11-1

11. Water Balance

The Director-General’s Requirements issued by DoP require the preparation of a waterbalance for the project. A detailed balance of water sources, uses and possible discharges indry, average and wet years are detailed in this section.

11.1 TopographyThe Project Site is located at an elevation of 890m to 970 mAHD on the slopes of the GreatDividing Range to the immediate west of the catchment divide between the Coxs and TuronRiver Catchments in western NSW. The topography of the region is typified by rocky slopesand escarpments to the east and gentler slopes to the west. The hill slope on which theProject Site is located consists of a moderately steep slope of up to 13° decreasing to a moregentle slope of <7° to the north and northwest of the former open cut. (EA Report, May 2006)

11.2 Climate DataClimate data was sourced from the Bureau of Meteorology’s Climate Data Online(http://www.bom.gov.au/climate) for the

Lithgow (Birdwood St) station; and

Site number: 063224 Commenced: 1889 Closed: 08 Nov 2006

Elevation: 950m Latitude: 33.49°S Longitude: 150.15 °E

Bathurst Agricultural station.

Site number: 063224 Commenced: 1889 Closed: 08 Nov 2006

Elevation: 950m Latitude: 33.49°S Longitude: 150.15 °E

Rainfall

Statistic J F M A M J J A S O N D Ann

Mean rainfall (mm) 94.3 83.8 83.9 62.7 63 67.6 67.6 63.4 58.9 67.7 70 76.1 858.5

Median rainfall (mm) 85.1 65.6 65.6 50.3 44 52 50.7 48.6 53.3 59.5 66.4 67 845.8

Mean no. of days ofrain 10.6 10.2 10.6 9.1 10.4 11.7 11.7 11.1 10.2 10.3 10 9.8 125.7

Evaporation

Statistic J F M A M J J A S O N D Ann

Mean dailyevaporation (mm) 6.8 5.8 4.5 2.9 1.7 1.1 1.2 1.8 2.8 4 5.3 6.6 3.7

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RSWMP Revision 3: Chapter 11 – Water Balance 11-2

11.3 InputsRainfall runoff captured from clean and dirty catchments.

Annual Rainfall (mm/yr)

Average (50th percentile) 845.8

Dry (10th percentile) 614.9

Wet (90th percentile) 1083.5

Captured Runoff

Clean (ML/yr) Dirty (ML/yr) Total (ML/yr)

Area (ha) 29 23.2 -

Runoff Coefficient 0.2 0.6 -

Average Year 49.1 117.7 166.8

Dry Year 35.7 85.6 121.3

Wet Year 62.8 150.8 213.6

11.4 OutputsDaily evaporation from sediment and clean water dams on site; and

Daily application of water to suppress dust on roads, hardstand surfaces and otherdisturbed areas (used 2 L/m2/application with 4 applications per day for calculationpurposes).

Annual Evaporation^ (mm/yr)

Average 1351

Dry (10th percentile) 1824

Wet (90th percentile) 1216

Evaporation from Water Storages

Storage SurfaceArea (ha)

SurfaceArea

Coefficient

AverageAnn EvapLoss (ML)

Dry YearAnn EvapLoss (ML)

Wet YearAnn EvapLoss (ML)

Clean Water Dams 0.16 0.75 1.6 2.2 1.5

Sediment Dams 0.25 0.75 2.5 3.4 2.3

Total 0.41 4.2 5.6 3.8

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RSWMP Revision 3: Chapter 11 – Water Balance 11-3

Dust Suppression UsageUsed 2 L/m2/application with 4 applications per day for calculation purposes:

Area to be watered = 23.2 ha (pit floors, haul roads, facilities area, coal crushing areas)

Dry days water usage per day = 23.2 ha x 2 L/m2/application x 4 applications= 1.86 ML/day

Wet days water usage per day = 1/3 of dry days water usage= 0.62 ML/day

Dust Suppression # Wet Days Wet Usage # Dry Days Dry Usage ML/yr

Average 110 0.62 ML/day 202 1.86 ML/day 444

Dry (10th percentile) 80 0.62 ML/day 232 1.86 ML/day 481

Wet (90th percentiile) 141 0.62 ML/day 171 1.86 ML/day 405

11.5 Water Balance

Average Year Dry Year Wet Year

Inputs (ML/year) 167 121 214

Outputs (ML/year) 448 487 409

Net Runoff (ML/year) -281 -366 -195

11.6 SummaryThe dust suppression application rate is an estimate only, and may differ from the actualapplication rate on site, which is governed by the mining activities on a particular day and thepreceding weather conditions. As a result, the results shown in Table 11.5 are indicative only,and not exact. What Table 11.5 does show, is that the volume of water required for dustsuppression on site, exceeds the amount of surface water that can be captured at IvanhoeNorth.

This result is consistent with the conditions experienced at Ivanhoe North during the past yearof operations, when water had to be sourced from external sources (Ivanhoe Colliery andLamberts Gully) to meet site water requirements.

It is thus crucial that Ivanhoe North continue their existing attentive monitoring regime tosecure water supply for mining and rehabilitation operations.

11.7 Annual Re-Calculation of the Water BalanceThe Annual Environmental Management Report (AEMR) provides for an annual recalculationof the water balance. The AEMR will review all water extracted, transferred, used and/ordischarged off site. This Water Balance chapter of the Site Water Management Plan will beupdated following submission of the AEMR to reflect any changes in the water balanceidentified in the review process.

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Ivanhoe North Rehabilitation Project

RSWMP Revision 3: Chapter 12 – Erosion & Sediment Control 12-1

12. Erosion and Sediment Control

In compliance with Schedule 3, Condition 10 of PA 05_0103, this Erosion and SedimentControl Plan (ESCP) has been prepared in accordance with the guideline document“Managing Urban Stormwater: Soils and Construction Manual, 2004” (the ‘Blue Book’).

This section summarises the erosion and sediment control management system in place atIvanhoe North.

The following chapter is an amendment of Section 6 of the original SWMP.

12.1 Management PrinciplesThe principal objectives of the ESCP are:

To minimise erosion and sedimentation from all active and rehabilitated areas, therebyminimising sediment ingress into surrounding surface waters.

To ensure the segregation of “dirty” water from “clean” water, and maximise the retentiontime of “dirty” water such that any discharge from the project site meets the water qualityobjectives.

Minimise the volume of water discharged from the project. Should the discharge of waterprove necessary, ensure sufficient settlement time is provided prior to discharge, orflocculating agent is added to the water, such that suspended sediment within the watermeets the water quality objectives.

To manage surface flows upstream of the project site so that rehabilitation and coalrecovery activities are not affected by flooding.

To minimise erosion of the ephemeral watercourses (Streams 1 to 4) that traverse theproject site.

To ensure sustainable long-term surface water features are established followingrehabilitation of the project site, including the implementation of an effective revegetationand maintenance program.

To monitor the effectiveness of surface water and sediment controls and to ensure allrelevant surface water quality criteria are met.

The principle design aspect of the project is the prevention of “clean water” in ephemeraldrainage channels entering the active disturbance area through the use of cut-off drains,dams and piped diversions, as well as the containment of “dirty water” in sediment controlstructures within the active areas of the project to eliminate any uncontrolled runoff. Eachephemeral watercourse would be restored, dams removed, and water re-directed into thenatural channel once rehabilitation of the disturbed area is satisfactorily stable.

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RSWMP Revision 3: Chapter 12 – Erosion & Sediment Control 12-2

12.2 Potential Sources of ErosionThe identified areas of the project which may be sources of erosion include:

Active areas of disturbance;

ROM and produce coal stockpiles;

Haul roads;

Site access roads;

Soil stockpiles; and

Rehabilitated areas (until stabilised).

12.3 Erosion and Sediment Control System

Minimal DisturbanceLand disturbance will be minimised by clearing the smallest practical area of land ahead ofrehabilitation and coal recovery activities and leaving this disturbed for the shortest possibletime. This would be achieved by:

Restricting the areas to be cleared of existing vegetation to the areas directly upslope ofthe abandoned high wall;

Implementing all proposed erosion and sediment control measures in advance of, or inconjunction with, clearing and stripping operations;

Marking the limits of disturbance prior to clearing commencing using pegs placed atintervals on each side of the disturbed area; and

Planning all operations to ensure that there is no damage to any trees outside the limits tobe cleared.

Management of Soil ResourcesOnce the larger vegetation has been cleared from areas to be developed for the project,topsoil will be stripped to a depth of approximately 150 mm (will vary depending on area) fromareas within the drainage depressions of the four streams, and approximately 100 mm (willvary depending on area) from the crests and slopes of the areas to be disturbed (GCNRC,2006). About 500 mm of subsoil will be stripped separately to the topsoil. As far aspracticable, topsoil stripping will be undertaken when the soil is in a slightly moist condition,thus reducing damage to soil structure, but not in wet conditions.

The soils are generally highly structured, thus excessive handling of the materials, or handlingwhen the soils are wet would be avoided to protect any structure that may have developed(GCNRC, 2006). Stripped soil would be transported to completed sections of the finallandform for immediate spreading if operational sequences, equipment scheduling andweather conditions permit. Where this is not the case, topsoil would be transferred tostockpiles within existing areas of disturbance, or at the up-slope perimeter of the coalrecovery and rehabilitation blocks to allow for immediate replacement once suitable areas ofthe final landform are created.

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RSWMP Revision 3: Chapter 12 – Erosion & Sediment Control 12-3

Where the stockpile is located on the up-slope perimeter of the coal recovery andrehabilitation bocks, the stockpiles will be located so as not to impede natural drainage pathswith temporary sediment control measures such as sand bags and silt fences would be usedto prevent sediment from leaving the area.

Re-spread topsoil would be levelled to achieve an even surface, avoiding a compacted or anover-smooth finish.

Haul Road and Site Access RoadsAll internal roads will be constructed to ensure surface drainage is optimised and stabilised,thereby reducing roadside erosion and sedimentation. Cross-fall drainage structures andmitre drainage would be implemented for the entire length of the roads. Crowning wouldgenerally be implemented on any steeper sections of the roads. Out-fall drainage would beconstructed where the road traverses small fill batter areas, and in-fall drainage would occurwhere the road traverses larger fill batter areas. Road runoff would be intercepted at regularintervals to reduce runoff velocity in each mitre drain.

Mitre drains are to be constructed so that water from the internal haul road is directed to thein-pit sediment control structures or the out-of-pit sediment dams. The internal haul road is tobe constructed down slope of the mined and backfilled disturbance areas, and will beconstructed so that it effectively forms a containment bund to prevent any uncontrolled runofffrom the mined and backfilled disturbance areas.

Clean Water Dams and Diversion WorksAs noted in Chapter 4, four natural ephemeral streams will be disturbed by the coal recoveryand rehabilitation activities. Ideally these streams would be fully diverted into adjoining sub-catchments, however, this is impractical due to the relatively steep topography and shallownature of the soils overlying bedrock. Instead, water flows will be diverted (via diversionbanks) to and captured in clean water dams.

Clean water diversion and capture will be undertaken in the following sequence.

Prior to ground disturbance commencing in a coal recovery block through which a streamflows, a clean water dam will be constructed immediately up-slope of the perimeter of theblock.

Diversion or catch banks will then be constructed to divert all water from the streamcatchment to this dam.

Water captured in the clean water dam will be used for dust suppression on site. As theclean water dam reaches capacity, the water will overflow into the workings and used fordust suppression or pumped out to the sediment dams.

Once overburden and soil replacement in the coal recovery block is complete and thefinal landform is satisfactorily established and stabilised, a natural formation of thedisturbed stream will be reinstated and the water transfer system decommissioned.

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RSWMP Revision 3: Chapter 12 – Erosion & Sediment Control 12-4

Dirty Water Capture from Disturbed AreasAll runoff from the disturbed areas (including proposed active mining, backfilled areas andexisting disturbed areas of the Cullen Main West open cut will be fully contained within thedisturbance area. This will be achieved by the:

Retention of the existing out-of-pit spoil dump (of the Cullen Main West open cut) which islocated down-slope of the proposed disturbance area and effectively acts as acontainment bund at present for the majority of the existing disturbed areas;

Augmentation of sections of the existing out-of-pit spoil dump to ensure there are nopoints where the bund can be breached and that it provides an effective containment bundfor the full length of the disturbed area; and

Construction of internal haul road down-slope of the disturbance areas so that, incombination with the existing out-of-pit spoil dump, it effectively forms a containment bund.

Minor surface drainage works will be used in combination with the grading of the pit floor toconvey dirty water to in-pit sumps, to be located within the disturbance area. The in-pit sumpswill be large enough to act as a sediment trap and allow for some initial settlement of the dirtywater. Wherever possible, the construction of in-pit sumps will utilise the existing ponds whichhave formed on the floor of the Cullen Main West open cut at natural low points.

Water accumulating in the in-pit sumps will mainly be used for dust suppression orperiodically transferred to the sediment dams to allow treatment of the dirty water prior todischarge from site. Water will typically be transferred to the sediment dams via pumped, orgravity flow, within temporary pipes. However, where practical water may be transferred usingwater carts or surface flow in constructed drainage channels.

Under extreme rainfall events that exceed the design criteria of sediment dams, excess waterwill be contained within the pit area until it can be transferred to the out-of-pit sediment dams.Water contained in-pit in these circumstances is likely to impact on the mining operation suchthat mining may be ceased until water can be transferred to the out-of-pit sediment dams. Inthis way the site water management prevents the uncontrolled discharge of dirty water fromsite in all but the most extreme rainfall events.

All runoff from the Coal Crushing Area will be directed to Sediment Dam No.3 to allow fortreatment and re-use of the dirty water. Minor surface drainage works will be used incombination with the grading of the surface of the Coal Crushing Area to convey dirty water toSediment Dam No.3.

The Facilities Area is a relatively small area (0.7 ha) with armoured surfaces (i.e. office,amenities, bunded fuel bay and gravelled carpark surface) that do not require the constructionof large sediment control structures. Standard ‘Blue Book’ temporary sediment and erosioncontrol devices (such as sediment fencing and straw bale sediment filters) will be used for thisarea.

Sediment Dams and Diversion WorksDirty water captured within the disturbed areas (including proposed active mining, backfilledareas and existing disturbed areas of the Cullen Main West open cut) will be transferred to

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RSWMP Revision 3: Chapter 12 – Erosion & Sediment Control 12-5

out-of-pit sediment dams to allow treatment of the dirty water prior to any discharge from site.Chapter 5 details the location, sizing and operation of the sediment dams.

Re-use of Dirty WaterWater will be extracted from the sediment dams and the clean water dams (should supplyfrom the sediment dams fail) and used for dust suppression on site. In some cases the watermay be taken directly from the in-pit sumps prior to reaching the sediment dams, however, forpurposes of demonstrating the water balance it has been assumed that this water will betaken from the sediment dams.

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Ivanhoe North Rehabilitation Project

RSWMP Revision 3: Chapter 13 – Legislation 13-1

13. Legislation

13.1 LegislationEnvironmental Planning and Assessment Act 1979, Section 75W

Protection of the Environment Operations Act 1997, section 55

Water Act 1912, Part V

Water Management Act 2000

13.2 PolicyNational Water Quality Management Strategy: Australian and New Zealand Guidelines for

Fresh and Marine Water Quality (ANZECC 2000)

National Water Quality Management Strategy Australian Guidelines for Water QualityMonitoring and Reporting (ANZECC 2000)

Approved Methods for the Sampling and Analysis of Water Pollutants in NSW (DECCW,2004)

Managing Urban Stormwater: Soils and Construction (Vol. 1)

Managing Urban Stormwater: Soils and Construction (Vol. 2E)

Managing Urban Stormwater: Source Control (EPA 1998)

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Appendix A

Project Approval 05_0103Updated Statement of Commitments – September 2006

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Project ApprovalSection 75J of the Environmental Planning and Assessment Act 1979

I, the Minister for Planning, approve the Project referred to in Schedule 1, subject to the conditions inSchedules 2 to 5.

These conditions are required to: prevent, minimise, and/or offset adverse environmental impacts; set standards and performance measures for acceptable environmental performance; require regular monitoring and reporting; and provide for the ongoing environmental management of the Project.

SIGNED BY MINISTER SARTOR ON 11 APRIL 2007

Frank Sartor MPMinister for Planning

Sydney 2007 File No: 9039486SCHEDULE 1

Application No: 05_0103

Proponent: Ivanhoe Coal Pty Limited

Approval Authority: Minister for Planning

Land: Part of Ben Bullen State Forest (No Title, see Appendix 2)

Project: Ivanhoe North Rehabilitation Project

2

TABLE OF CONTENTS

1. ADMINISTRATIVE CONDITIONS 4

2. SPECIFIC ENVIRONMENTAL CONDITIONS

Noise 6Air Quality 6Surface Water 7Rehabilitation Management 8Ben Bullen State Forest 9Traffic and Transport 9Visual Impact 9Greenhouse Gases 9Waste Minimisation 10

3. ENVIRONMENTAL MANAGEMENT, MONITORING, AUDITING AND REPORTING

Environmental Management Strategy 11Environmental Monitoring Program 11Incident Reporting 11Annual Reporting 11Independent Environmental Audit 11Updating Environmental Management Requirements 12Access to Information 12

4. APPENDIX 1: INDEPENDENT DISPUTE RESOLUTION PROCESS 13

5. APPENDIX 2: LOCATION OF PROJECT SITE AND ADJACENT RESIDENCES 14

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DEFINITIONS

AEMR Annual Environmental Management ReportCoal haulage The movement of coal trucks to or from the Ivanhoe North site on public

roadsCouncil Lithgow City CouncilDay Day is defined as the period from 7am to 6pm on Monday to Saturday,

and 8am to 6pm on Sundays and public holidaysDEC Department of Environment and ConservationDepartment Department of PlanningDirector-General Director-General of Department of Planning, or delegateDNR Department of Natural ResourcesDPI Department of Primary IndustriesEA Environmental AssessmentEP&A Act Environmental Planning and Assessment Act 1979EP&A Regulation Environmental Planning and Assessment Regulation 2000Evening Evening is defined as the period from 6pm to 10pmLand Land means the whole of a lot, or contiguous lots owned by the same

landowner, in a current plan registered at the Land Titles Office at thedate of this approval

Minister Minister for Planning, or delegatePrivately owned land Land that is not owned by a public agency, or a mining company or its

subsidiary; and where relevant, land that is not covered by a privateagreement between the Applicant and the land owner that specificallyallows for variances to criteria for environmental performance in thisconsent

Proponent Ivanhoe Coal Pty Limited, or its successors in titleROM Run of mineRTA Roads and Traffic AuthoritySite Land to which the Project Application applies

4

SCHEDULE 2ADMINISTRATIVE CONDITIONS

Obligation to Minimise Harm to the Environment

1. The Proponent shall implement all practicable measures to prevent and/or minimise any harm to theenvironment that may result from the construction, operation, or rehabilitation of the Project.

Terms of Approval

2. The Proponent shall carry out the Project generally in accordance with the:(a) Project Application 05_0103;(b) Proposed Ivanhoe North Rehabilitation Project - Environmental Assessment, dated May 2006,

and prepared by RW Corkery & Co;(c) Ivanhoe North Rehabilitation Project - Updated Statement of Commitments, dated September

2006, compiled by RW Corkery & Co; and(d) conditions of this approval.

3. If there is any inconsistency between the above documents, the latter document shall prevail over theformer to the extent of the inconsistency. However, the conditions of this consent shall prevail over allother documents to the extent of any inconsistency.

4. The Proponent shall comply with any reasonable requirement/s of the Director-General arising fromthe Department’s assessment of:(a) any reports, plans, programs or correspondence that are submitted in accordance with this

approval; and(b) the implementation of any actions or measures contained in these reports, plans, programs or

correspondence.

Limits on Approval

5. In respect of the right to conduct coal mining operations, this consent is limited to a period of 3 yearsfrom the date of grant of the mining lease to mine coal.

Note: Under this consent, the Applicant is required to rehabilitate the site to the satisfaction of the DPI and theconsent will continue for this and related purposes.

6. The Proponent shall not extract more than 300,000 tonnes of ROM coal a year from the site.

7. The Proponent shall comply with the operating hours in Table 1:

Table 1: Operating hours

Activity Days of the Week TimeMonday to Saturday(inclusive)

7 am to 6 pmCoal recoveryCoal processingRehabilitation activities Sunday and public holidays No work at any time

Monday to Saturday(inclusive)

7 am to 6 pmCoal transportation

Sunday and public holidays No work at any timeMinor maintenance works on plant and machinery

7 days a week and publicholidays

Any time

Demolition

8. The Proponent shall ensure that all demolition work is carried out in accordance with AustralianStandard AS 2601-2001: The Demolition of Structures, or its latest version.

Structural Adequacy

9. The Proponent shall ensure that all new buildings and structures, and any alterations or additions toexisting buildings and structures, are constructed in accordance with the relevant requirements of theBCA.Notes:

Under Part 4A of the EP&A Act, the Proponent is required to obtain construction and occupation certificatesfor the proposed building works.Part 8 of the EP&A Regulation sets out the requirements for the certification of the Project.

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Operation of Plant and Equipment

10. The Proponent shall ensure that all plant and equipment used at the site is:(a) maintained in a proper and efficient condition; and(b) operated in a proper and efficient manner.

Community Enhancement Contribution

11. Within 6 months of this approval, the Proponent shall contribute $15,000 to Lithgow CityCouncil for the provision of community facilities in the Cullen Bullen area. Any monies notexpended on such facilities within 2 years of their receipt shall be returned to the Proponentby the Council.

6

SCHEDULE 3SPECIFIC ENVIRONMENTAL CONDITIONS

NOISE

Noise Impact Assessment Criteria1. The Proponent shall ensure that the noise generated by the Project does not exceed the noise impact

assessment criteria in Table 2 for any privately owned residence.

Table 2: Noise impact assessment criteria dB(A)

LAeq(15 minute) Land Reference and Owner

36 K (Muenzer)

35All other residences

Notes:a) Noise from the Project is to be measured at the most affected point or within the residential boundary, or at the

most affected point within 30 metres of a dwelling (rural situations) where the dwelling is more than 30 metresfrom the boundary, to determine compliance with the LAeq(15 minute) noise limits in the above table. Themodification factors in Section 4 of the NSW Industrial Noise Policy shall also be applied to the measurednoise levels where applicable.

b) Where it can be demonstrated that direct measurement of noise from the Project is impractical, the DEC mayaccept alternative means of determining compliance (see Chapter 11 of the NSW Industrial Noise Policy).

c) The noise emission limits identified in the above table apply under meteorological conditions of:wind speeds of up to 3 m/s at 10 metres above ground level; ortemperature inversion conditions of up to 3ºC/100m, and wind speeds of up to 2 m/s at 10 metres aboveground level.

d) The locations of residences in Table 2 are shown in Appendix 2 of this approval.

Continuous Improvement

2. The Proponent shall:(a) implement all reasonable and feasible noise mitigation measures;(b) investigate ways to reduce the noise generated by the Project; and(c) report on these investigations and the implementation and effectiveness of these measures in

the AEMR,to the satisfaction of the Director-General.

Monitoring

3. Prior to the commencement of mining and/or rehabilitation activities, the Proponent shall prepare (andfollowing approval implement) a Noise Monitoring Program for the Project, to the satisfaction of theDirector-General. This Program must include attended monitoring at residences C, G, and K, andinclude a noise monitoring protocol for evaluating compliance with the noise impact assessment criteriain this approval.

Additional Noise Mitigation Measures

4. Upon receiving a written request from the owner of any privately owned residence where subsequentnoise monitoring shows the noise generated by the Project is greater than, or equal to, LAeq(15 minute) 38dB(A), the Proponent shall implement additional noise mitigation measures such as double glazing,insulation and/or air conditioning at any residence on the land in consultation with the landowner. Theseadditional mitigation measures must be reasonable and feasible. If within 3 months of receiving thisrequest from the landowner, the Proponent and the landowner cannot agree on the measures to beimplemented, or there is a dispute about the implementation of these measures, then either party mayrefer the matter to the Director-General for resolution.

AIR QUALITY

Impact Assessment Criteria

5. The Proponent shall ensure that the dust emissions generated from the Project do not causeexceedances of the air quality impact assessment criteria listed in Tables 4, 5 and 6 at any residence onany privately owned land.

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Table 4: Long term impact assessment criteria for particulate matter

Pollutant Averaging period Criterion

Total suspended particulate (TSP) matter Annual 90 µg/m3

Particulate matter < 10 µm (PM10) Annual 30 µg/m3

Table 5: Short term impact assessment criterion for particulate matter

Pollutant Averaging period Criterion

Particulate matter < 10 µm (PM10) 24 hour 50 µg/m3

Table 6: Long term impact assessment criteria for deposited dust

Pollutant Averagingperiod

Maximum increase indeposited dust level

Maximum total depositeddust level

Deposited dust Annual 2 g/m2/month 4 g/m2/month

Note: Deposited dust is assessed as insoluble solids as defined by Standards Australia, 2003, AS3580.10.1-2003: Methods for Sampling and Analysis of Ambient Air - Determination of Particulates -Deposited Matter - Gravimetric Method.

Continuous Improvement

6. The Proponent shall:(a) implement all reasonable and feasible air quality impact mitigation measures;(b) investigate ways to reduce the air quality impacts generated by the Project;(c) ensure any visible air pollution generated by the Project is assessed regularly; and(d) report on these assessments and investigations and the implementation and effectiveness of

these measures in the AEMR,to the satisfaction of the Director-General.

SURFACE WATER

Discharge Limits

7. Except as may be expressly provided by a DEC Environment Protection Licence, the Proponent shallnot discharge any water from the site or to underground mine workings.

Site Water Management Plan

8. Prior to the commencement of works, the Proponent shall prepare (and following approval implement) aSite Water Management Plan for the Project, in consultation with the DEC, and to the satisfaction of theDirector-General. This plan must include:

(a) a Site Water Balance;(b) an Erosion and Sediment Control Plan; and(c) a Surface Water Monitoring Program.

Site Water Balance

9. The Site Water Balance must:(a) include details of all water extracted, dewatered, transferred, used and/or discharged by the

Project; and(b) provide for the annual re-calculation of the water balance and its reporting in the AEMR.

8

Erosion and Sediment Control Plan

10. The Erosion and Sediment Control Plan must:(a) be consistent with the requirements of the Department of Housing’s Managing Urban

Stormwater: Soils and Construction manual;(b) identify activities that could cause soil erosion and generate sediment;(c) describe measures to minimise soil erosion and the potential for the transport of sediment to

downstream waters;(d) describe the location, function, and capacity of erosion and sediment control structures; and(e) describe what measures would be implemented to maintain the structures over time.

Surface Water Monitoring Plan

11. The Surface Water Monitoring Plan must include:(a) surface water impact assessment criteria;(b) a program to monitor the volume and quality of any off-site water discharges;(c) a program to monitor surface water flows and quality in local watercourses;(d) a protocol for the investigation, notification, and mitigation of identified exceedances of the

surface water assessment criteria.

REHABILITATION MANAGEMENT

12. Prior to commencement of mining and/or rehabilitation activities, the Proponent shall prepare (andfollowing approval implement) a Rehabilitation Management Plan for the mine, in consultation with DNR,DEC and DPI, and to the satisfaction of the Director-General.

13. The Proponent shall progressively rehabilitate the site in a manner that is generally consistent with thefinal landform in the Rehabilitation Management Plan, to the satisfaction of the Director-General.

14. The Rehabilitation Management Plan must include:(a) the rehabilitation objectives for the site;(b) a description of the short, medium, and long term measures that would be implemented to:

rehabilitate the site; and manage the remnant vegetation and habitat on the site;

(c) a detailed completion criteria for the rehabilitation of the site;(d) a detailed description of how the performance of the rehabilitation of the mine would be

monitored over time to achieve the stated objectives;(e) a detailed description of what measures would be implemented to rehabilitate and manage the

landscape of the site including the procedures to be implemented for: collecting and propagating seed for rehabilitation works; the provision of adequate propagation stock for each rehabilitation area; progressively rehabilitating areas disturbed by mining; how operational works and rehabilitation works will be phased so as to ensure that

sufficient viable seed and propagations stock is available implementing revegetation and regeneration; rehabilitating watercourses on the site; managing impacts on fauna; conserving and reusing topsoil; salvaging and reusing material from the site for habitat enhancement; controlling weeds and feral pests; controlling access; bushfire management; and mine closure;

(f) a description of the measures that would be implemented if any Aboriginal objects arediscovered during the rehabilitation of the site; and

(g) details of who is responsible for monitoring, reviewing, and implementing the plan.

Note: References to “rehabilitation” in this approval include all works associated with the rehabilitation andrestoration of the site as described in the Environmental Assessment and Part 3 of the Specialist ConsultantStudies Compendium.

15. Following the completion of mining activities, the Proponent must remove and rehabilitate the RetainedWater Storage (as shown on Figure 2.7 of the EA), to the satisfaction of the Director-General, exceptwith the agreement of the Director-General.

16. Prior to the commencement of stream rehabilitation works for “Stream 3” (as shown in Figure 3.4 of theEA), the Proponent must prepare (and following approval implement) a design for the streamrehabilitation works, to the satisfaction of the DNR.

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BEN BULLEN STATE FOREST

17. Prior to the removal of any commercially viable timber within Ben Bullen State Forest, the Proponentshall consult with the Macquarie Region office of Forests NSW.

18. Prior to the commencement of mining and/or rehabilitation operations within Ben Bullen State Forest,the Proponent shall prepare a Bush Fire Management Plan, to the satisfaction of the Macquarie Regionoffice of Forests NSW.

TRAFFIC AND TRANSPORT

Monitoring of Coal Transport

19. The Proponent must not despatch more than 50 truck loads of coal from the site on any day.

20. The Proponent shall:(a) keep records of the:

amount of coal transported from the site each year; number of truck loads generated by the Project (on a daily basis) departure times of trucks; and

(b) include these records in the AEMR.

Traffic Management

21. Prior to the transport of any coal from the site by road, the Proponent shall obtain a written agreementfrom the Invincible Colliery to allow the use of its site entrance and internal roads by trucks hauling coalfrom the Project.

22. Prior to commencement of mining and/or rehabilitation operations, the Proponent shall prepare a TrafficManagement Plan, as detailed in the EA, in consultation with the RTA and to the satisfaction of theDirector-General. This plan must include:

(a) details of how coal transport from both the Project site and the Invincible Colliery would be co-ordinated;

(b) identify how coal transport from the Project site will be managed to minimise inconvenience toother road users and operate safely on public roads; and

(c) identify how the implementation and effectiveness of the plan will be monitored and reported.

23. Prior to the transport of any coal from the site by road, the Proponent shall re-design and re-construct:(a) the site access road-Castlereagh Highway intersection; and(b) the Western Main Colliery-Castlereagh Highway intersection,to the satisfaction of the RTA.

24. The Proponent shall ensure that all coal trucks exiting from the site access road do not enter thesouthbound lane of the Castlereagh Highway.

VISUAL IMPACT

25. Prior to commencement of mining in operational blocks Nth04 and Nth05, the Proponent must constructa 4 metre high bund wall along the eastern perimeter of those blocks in accordance with thespecifications included in the EA for construction and revegetation.

Lighting Emissions

26. The Proponent shall:(a) take all practicable measures to mitigate off-site lighting impacts from the Project; and(b) ensure that all external lighting associated with the Project complies with Australian Standard

AS4282 (INT) 1995 – Control of Obtrusive Effects of Outdoor Lighting,to the satisfaction of the Director-General.

GREENHOUSE GASES

27. The Proponent shall:(a) estimate the greenhouse gas emissions generated by the Project;(b) investigate ways to reduce greenhouse gas emissions generated by the Project; and(c) report on greenhouse gas estimation and abatement measures in the AEMR,to the satisfaction of the Director-General.

10

WASTE MINIMISATION

28. The Proponent shall:(a) monitor the amount of waste generated by the Project;(b) investigate ways to minimise waste generated by the Project;(c) implement reasonable and feasible measures to minimise waste generated by the Project;(d) ensure any irrigation of treated wastewater is undertaken in accordance with DEC’s

Environmental Guideline for the Utilisation of Treated Effluent; and(e) report on waste management and minimisation in the AEMR,to the satisfaction of the Director-General.

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SCHEDULE 4ENVIRONMENTAL MANAGEMENT, MONITORING, AUDITING AND REPORTING

ENVIRONMENTAL MANAGEMENT STRATEGY

1. Prior to carrying out any mining and/or rehabilitation activities, the Proponent shall prepare andimplement an Environmental Management Strategy for the Project to the satisfaction of the Director-General. This strategy must:

(a) provide the strategic context for environmental management of the Project;(b) identify the statutory requirements that apply to the Project;(c) describe in general how the environmental performance of the Project would be monitored and

managed during the Project;(d) describe the procedures that would be implemented to:

keep the local community and relevant agencies informed about the operation andenvironmental performance of the Project;

receive, handle, respond to, and record complaints; resolve any disputes that may arise during the course of the Project; respond to any non-compliance; manage cumulative impacts; and respond to emergencies; and

(e) describe the role, responsibility, authority, and accountability of all the key personnel involvedin environmental management of the Project.

ENVIRONMENTAL MONITORING PROGRAM

2. Prior to commencement of mining and/or rehabilitation activities, the Proponent shall prepare anEnvironmental Monitoring Program for the Project in consultation with relevant agencies, and to thesatisfaction of the Director-General. This program must consolidate the various monitoring requirementsin Schedule 3 of this approval into a single document.

INCIDENT REPORTING

3. Within 7 days of detecting an exceedance of the limits/performance criteria in this approval, theProponent shall report the exceedance to the Department, and any relevant agency. The report must:

(a) describe the date, time, and nature of the exceedance;(b) identify the cause or likely cause of the exceedance;(c) describe what action has been taken to date; and(d) describe the proposed measures to address the exceedance.

ANNUAL REPORTING

4. The Proponent shall prepare and submit an AEMR to the Director-General and other relevant agencies.This report must:

(a) identify the standards and performance measures that apply to the Project;(b) describe the works carried out in the last 12 months;(c) describe the works that will be carried out in the next 12 months;(d) include a summary of the complaints received during the past year, and compare this to the

complaints received in previous years;(e) include a summary of the monitoring results for the Project during the past year;(f) include an analysis of these monitoring results against the relevant:

impact assessment criteria; monitoring results from previous years; and predictions in the EA;

(g) identify any trends in the monitoring results over the life of the Project;(h) identify any non-compliance during the previous year; and(i) describe what actions were, or are being, taken to ensure compliance.

INDEPENDENT ENVIRONMENTAL AUDIT

5. At the end of year 1 of the Project, and on completion of coal mining operations, unless the Director-General directs otherwise, the Proponent shall commission and pay the full cost of an IndependentEnvironmental Audit of the Project. This audit must:

(a) be conducted by suitably qualified, experienced, and independent expert/s whose appointmenthas been endorsed by the Director-General;

(b) assess the various aspects of the environmental performance of the Project, and its effects onthe surrounding environment;

(c) assess whether the Project is complying with the relevant standards, performance measures,and statutory requirements;

12

(d) assess whether the Project is complying with the works as described in the EA and conditionsof consent;

(e) review the adequacy of any strategy/plan/program required under this approval; and, ifnecessary,

(f) recommend measures or actions to improve the environmental performance of the Project,and/or any strategy/plan/program required under this approval.

6. Within 3 months of commissioning this audit, or as otherwise agreed by the Director-General, theProponent shall submit a copy of the audit report to the Director-General, with a response to anyrecommendations contained in the audit report.

ACCESS TO INFORMATION

7. Within 3 months of the approval of any plan/strategy/program required under this approval (or anysubsequent revision of these plans/strategies/programs), the completion of the IndependentEnvironmental Audits required under this approval, or the completion of the AEMR, the Proponent shall:

(a) provide a copy of the relevant document/s to the Council and relevant agencies;(b) ensure that a copy of the relevant document/s is made publicly available; and(c) put a copy of the relevant document/s on the Proponent’s website;to the satisfaction of the Director-General.

8. During the life of the Project, the Proponent shall:(a) make a summary of monitoring results required under this approval publicly available on its

website; and(b) update these results on a regular basis (at least every 6 months),to the satisfaction of the Director-General.

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×ÒÜÛÐÛÒÜÛÒÌ Ü×ÍÐËÌÛ ÎÛÍÑÔËÌ×ÑÒ ÐÎÑÝÛÍÍ

Independent Dispute Resolution Process(Indicative only)

Matter referred to Independent Dispute Facilitator appointedby the Department in consultation with Council

Independent Dispute Facilitator meets with partiesddiscuss dispute

Dispute not resolvedDispute resolved

Agreed Outcome

Facilitator consults relevantindependent experts for

advice on technical issues

Facilitator meets with relevantparties and experts

Dispute resolved Dispute not resolved

Facilitator consults theDepartment and

final decision made

14

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ABN: 79 064 237 154

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Compiled by:

September 2006

R.W. CORKERY & CO. PTY. LIMITED

R. W. CORKERY & CO. PTY. LIMITED

This page has intentionally been left blank

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UPDATED STATEMENT OF COMMITMENTS - i - IVANHOE COAL PTY LIMITED8 September 2006 Ivanhoe North Rehabilitator Project

Report No. 667/07

R. W. CORKERY & CO. PTY. LIMITED

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Prepared by: On behalf of:

R.W. Corkery & Co. Pty. LimitedGeological & Environmental Consultants75 Kite StreetORANGE NSW 2800

Ivanhoe Coal Pty LimitedLevel 18, BT Tower

1 Market StreetSYDNEY NSW 2000

ABN: 31 002 033 712 ABN: 79 064 237 154

Telephone: 02 6362 5411Facsimile: 02 6361 3622Email: [email protected]

Telephone: 02 9266 2724 Facsimile: 02 9261 5533

Email: [email protected]

September 2006 Ref No. 667/07

G:\MEDIACOM\CORPORAT\COMMUNICATIONS_PLANNING\00_WEBSITE_PRODUCTION\_website_content\major_project_asst\3_DETERMINATION\MP05_0103_ivanhoe\Revised Statement of Commitments.doc

IVANHOE COAL PTY LIMITED - ii - UPDATED STATEMENT OF COMMITMENTSIvanhoe North Rehabilitation Project 8 September 2006Report No. 667/07

R. W. CORKERY & CO. PTY. LIMITED

This Copyright is included for the protection of this document

COPYRIGHT

© R.W. Corkery & Co. Pty. Limited 2006and

© Ivanhoe Coal Pty Ltd 2006

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 CopyrightAct, 1968, no part of this report may be reproduced, transmitted, stored in a retrieval system or adapted in any form or byany means (electronic, mechanical, photocopying, recording or otherwise) without written permission. Enquiries should beaddressed to R.W. Corkery & Co. Pty. Limited.

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UPDATED STATEMENT OF COMMITMENTS 1 IVANHOE COAL PTY LIMITED8 September 2006 Ivanhoe North Rehabilitation Project Report No. 667/07

R. W. CORKERY & CO. PTY. LIMITED

Page

1. Traffic..................................................................................................................32. Noise...................................................................................................................43. Water Resources ................................................................................................44. Air Quality ...........................................................................................................75. Visual Amenity ....................................................................................................86. Flora and Fauna..................................................................................................87. Soil Resources....................................................................................................98. Aboriginal Heritage .............................................................................................9

IVANHOE COAL PTY LIMITED 2 UPDATED STATEMENT OF COMMITMENTSIvanhoe North Rehabilitation Project 8 September 2006Report No. 667/07

R. W. CORKERY & CO. PTY. LIMITED

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UPDATED STATEMENT OF COMMITMENTS 3 IVANHOE COAL PTY LIMITED8 September 2006 Ivanhoe North Rehabilitation Project Report No. 667/07

R. W. CORKERY & CO. PTY. LIMITED

Page 1 of 7Objective Environmental Commitment

1. TrafficAll coal carrying trucks exiting the Project Site are to cross the CastlereaghHighway and enter the Invincible Colliery. Using the internal transport loopof the Invincible Colliery, these trucks are to enter the CastlereaghHighway in a southerly direction via the established Invincible Colliery exit.

Appropriate signage, as directed by the RTA, is to be erected to notifymotorists of coal trucks crossing the Castlereagh Highway. The signage isto be in accordance with RTA (2002) – “Guide to Traffic GeneratingDevelopment”.

The RTA is to be consulted and lighting installed at the Ivanhoe North –Invincible Colliery crossing of the Castlereagh Highway.

Road-side vegetation is to be regularly monitored and slashed or cut backto ensure a sight distance >225m is retained at all times.

Impacts on traffic flowand road user safety atthe Project Site –Castlereagh Highwayintersection is not to beadversely effected by theProject.

A shaker grid is to be constructed across the outgoing lane of the ProjectSite entrance, setback 50m from Castlereagh Highway.

The intersection of the Western Main Colliery and the Castlereagh Highwayis to be upgraded as presented in Appendix 6 of the document “AdditionalInformation Provided on Traffic at the Castlereagh Highway – Western MainColliery Intersection”, submitted to the Department in June 2006.

Drivers employed or contracted are to be informed of the accident history atthe left hand kerb immediately north of Blackmans Flat and instructed toproceed with appropriate caution at this point.

Impacts on traffic flowand road user safety atthe Western Main Colliery– Castlereagh Highway isnot to be adverselyeffected by the Project.

Appropriate signage (in accordance with RTA (2002) – “Guide to TrafficGenerating Development”), as directed by the RTA, is to be erected tonotify motorists of trucks entering the Castlereagh Highway.

The Proponent is to instruct truck drivers to monitor the condition of theroads along the proposed transport route and report any deterioration.

The pavement conditionof the CastlereaghHighway is not to bemaintained in areasonable condition.

The Proponent is to enter into a mutually acceptable Section 94 contributionfor any deterioration of the road surface attributable to Ivanhoe North traffic.

Updated Statement ofEnvironmental Commitments

IVANHOE COAL PTY LIMITED 4 UPDATED STATEMENT OF COMMITMENTSIvanhoe North Rehabilitation Project 8 September 2006Report No. 667/07

R. W. CORKERY & CO. PTY. LIMITED

Page 2 of 7Objective Environmental Commitment1. Traffic (Cont’d)

A Works Authorisation Deed with the RTA following approval of the Projectis to be entered into, as required by the RTA.

All transportation activities are to be undertaken in accordance with theappropriate approval and licence conditions.

All trucks are to be well maintained and all truck drivers to be instructed toact in a courteous manner and obey all road rules.

Transport of coal from theProject Site is to beconducted in a safe andcourteous manner andnot impact on the generalsafety or amenity of roadusers.

All trucks exiting the Project Site are to have a covered load.

2. NoiseThe crushing area for the project is to be positioned within the partially filledvoid surrounding the Ivanhoe No.2 ventilation shaft entry point.

The internal haul road is to be oriented to utilise the existing out-of-pit spoildumps for acoustic shielding.

Equipment with lower sound power levels are to be used in preference tomore noisy equipment.

All equipment used on site is to be fully maintained to ensure each item ofequipment is operating at the lowest feasible noise level.

The on-site road network is to be well maintained to limit body noise fromempty trucks travelling on internal roads.

Noise received atsurrounding residences isto kept to below thefollowing levels.

Residence B: 32dB(A)

Residence C: 35dB(A)

Residence D: 36dB(A)

Residence G: 30dB(A)

Residence K: 32dB(A) The Proponent is to commission attended monitoring at Residences C, G &K on a 6 monthly basis.

3. Water ResourcesThe areas to be cleared of existing vegetation is to be restricted to thoseareas directly upslope of the abandoned high wall.

Prior to clearing commencing, the limits of clearing are to be marked bypegs placed at intervals on each side of the disturbed area.

Programming the works so that only the areas sufficient for the ensuing 3 to4 months of operations are to be cleared.

Disturbance will beminimised

All proposed erosion and sediment control measures are to be implementedin advance of, or in conjunction with, clearing and stripping operations.

A maximum topsoil stockpile height of two metres and a batter slope of 2:1(V:H) is to be maintained.

Temporary sediment control measures such as hay bales and silt-stopfences is to be used whenever necessary.

Soil will be stockpiled in away that reduces thepotential for erosion andsedimentation from these.

Stockpiles are to be placed away from natural or artificial drainage lines.

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UPDATED STATEMENT OF COMMITMENTS 5 IVANHOE COAL PTY LIMITED8 September 2006 Ivanhoe North Rehabilitation Project Report No. 667/07

R. W. CORKERY & CO. PTY. LIMITED

Page 3 of 7Objective Environmental Commitment3 Water Resources (Cont’d)

Topsoil is to be spread to a minimum depth of 100mm on 3:1 (V:H) orsteeper slopes and to a minimum depth of 50mm on flatter slopes.

Topsoil is to be spread along the contour of replaced overburden tominimise erosion by dumping at the top of slopes and grading downwardsand across the contour.

Re-spread topsoil is to be levelled to achieve an even surface, avoiding acompacted or an over-smooth finish.

Ripping is to be undertaken on the contour and rip lines directed to the fourstabilised drains.

Contour banks are to be constructed where ripping in the above manner isinsufficient to prevent erosion and contour bank directed to the fourstabilised drains.

All topsoiled areas is to be contour ripped (after topsoil spreading) to createa “key” between the soil and the overburden.

Reduce the potential forerosion andsedimentation fromprofiled sections of thefinal landform

Vehicle traffic is to be prevented from entering the rehabilitated areas.

The existing out-of-pit spoil dump is to be retained and operate as acontainment bund for water captured within the proposed operationalblocks, thereby allowing for dirty water to be directed towards sedimentbasins and sediment dams.

The floor of each operational block is to be graded such that the “dirtywater” is directed to constructed dirty water settling ponds.

A sediment basin is to be constructed within the coal crushing area tocapture any runoff from within this area.

Water captured withindisturbed areas of theProject Site will bedirected to internalerosion controls andwater storages prior todischarge.

All sediment basins and erosion control structures are to be designed andconstructed in accordance with DoH (2004).

Prior to ground disturbance commencing in a block through which adrainage line flows, clean water will be prevented from entering the activedisturbance area through the construction of temporary ‘clean water dams’(CWD) 1 to 4, immediately upstream of the block, and the construction ofappropriately placed cut-off drains immediately above the proposed limit ofdisturbance to direct catchment flows into the dam.

Clean water from each CWD is to be self siphoned through, or around, thedisturbance area via a 100mm HDPE pipeline and back into the naturaldrainage line downstream of the proposed disturbance area and sedimentdams.

Temporary Containmentof ‘Clean’ Water inEphemeral DrainageLines / Prevention of flowover the activeoperational areas of theProject Site.

Once overburden and soil replacement in the block is complete, and thefinal landform is satisfactorily established and stabilised, the flow is to berestored to its original flow path and the CWD is to be removed.

IVANHOE COAL PTY LIMITED 6 UPDATED STATEMENT OF COMMITMENTSIvanhoe North Rehabilitation Project 8 September 2006Report No. 667/07

R. W. CORKERY & CO. PTY. LIMITED

Page 4 of 7Objective Environmental Commitment3 Water Resources (Cont’d)

Temporary Containmentof ‘Clean’ Water inEphemeral DrainageLines / Prevention of flowover the activeoperational areas of theProject Site (cont’d).

Some keys design elements of the CWDs are: The dams are to be designed to capture the 5 year ARI storm

event, which is deemed appropriate, given the short two yearproject life, and each block typically being disturbed for only oneto three months.

For Streams 1, 2 & 4, a dam with a minimum capacity of 0.25MLis to be constructed (approximately 15m x 15m x 2m deep). Eachof these streams has a small catchment upstream of theproposed disturbance area.

For Stream 3 a dam with a minimum capacity of 1ML is to beconstructed (approximately 25m x 25m x 2m deep)

The dams are to be designed and constructed in accordance withthe typical design for “Earth Basin – Wet SD 6-4” provided in DoH(2004).

The cut-off drains are to be constructed in accordance with thetypical design for “Earth Bank – Low Flow SD 5-5” provided inDoH (2004).

The channel is to be generally trapezoidal in shape with a 2m base widthand 3:1 (H:V) batters. The overall width of each channel will be at least 4mfor Stream 1, 3.5m for Stream 2, 4.5m for Stream 3 and 3m for Stream 4.

Natural meanders are to be used instead of straight lines to reflect naturalstream characteristics.

The channel is to be rock lined and constructed with the placement ofproper sized rocks above a filter layer of suitable geotextile.

Soil is to be packed in between rocks to allow sedges and grasses to beestablished within the channel to provide for the long-term channel stability.

Stream 3 is to be rehabilitated as presented in Appendix 2 of the documententitled “Response to Submissions Provided by the Department ofPlanning”, submitted to the Department in August 2006.

Re-establishment ofephemeral drainage linesalong natural alignment.

A riparian corridor is to established with a minimum width of 20m fromeither bank in accordance with the guideline titled, ‘Watercourse andRiparian Zone Rehabilitation Requirements (Version 3)’ prepared by theDNR.

Water discharging from the internal controls is to be directed to twosediment dams designed and constructed to capture all flows from thecontributing catchment in accordance with the typical design for “EarthBasin – Dry SD 6-3” provided in DoH (2004).

Maintain water quality. Water discharged from SD-1 and SD-2 is to meet the following criteria:

pH 6.5 – 8.0 Electrical Conductivity < 1500 µs/cm. Total Grease < 10 mg/L. Suspended Solids < 50 mg/L.

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UPDATED STATEMENT OF COMMITMENTS 7 IVANHOE COAL PTY LIMITED8 September 2006 Ivanhoe North Rehabilitation Project Report No. 667/07

R. W. CORKERY & CO. PTY. LIMITED

Page 5 of 7Objective Environmental Commitment3 Water Resources (Cont’d)

Design and constructinternal roads to minimiseerosion andsedimentation potential.

Project Site roads are to be designed with the following features.

Cross-fall drainage structures and mitre drains to direct waterto the in-pit water management system.

Road runoff is to be intercepted at regular intervals (not toexceed 50m) to reduce runoff velocity in each mitre drain.

Steeper sections of the roads are to be crowned.

Surface water quality is to be monitored quarterly, with samples taken fromthe existing sites INW-1 & INW-2, clean water dams CWD1 – 4 andsediment dams SD-1 and SD-2.

Water samples are to be analysed for key parameters, including:

pH; Electrical Conductivity; Total Grease; and Suspended Solids.

Monitoring willundertaken to ensure themaintenance of waterquality and prevention oferosion andsedimentation.

Opportunistic grab samples may also be taken periodically from streamsduring significant rainfall events (20mm/24hr). These samples are to beanalysed for the same parameters as above.

4. Air QualityInternal haul roads are to be watered at a rate of approximately 2L/m2 perapplication.

The drop heights between front-end loader buckets and trucks carryingcoal or overburden are to be limited.

The coal crushing area for the project is to be positioned within the partiallyfilled void surrounding the Ivanhoe No.2 ventilation shaft entry point toprovide shielding from winds likely to result in the “lift-off” of dust from coalstockpiles.

The area of exposed surfaces is to be limited to that required for amaximum of 2-3 months operations.

Soil stockpiles retained for periods greater than three months is to beseeded to minimise wind erosion.

The Proponent is to cease any dust-generating activity(ies) in the eventthat strong winds are blowing dust towards residences and dustsuppression is ineffective.

Dust deposition atresidences surroundingthe Project Site will<3.8g/m2/month.

The Proponent is to establish a deposited dust monitoring program inconsultation with the DEC (EPA). It is anticipated the monitoring will be inthe form of two permanent deposited dust gauges, analysed on a monthlybasis, most likely located at Residences C and K.

IVANHOE COAL PTY LIMITED 8 UPDATED STATEMENT OF COMMITMENTSIvanhoe North Rehabilitation Project 8 September 2006Report No. 667/07

R. W. CORKERY & CO. PTY. LIMITED

Page 6 of 7Objective Environmental Commitment5. Visual Amenity

The Project Site is to be progressively rehabilitated to create a landformsimilar to that of the surrounding Ben Bullen State Forest.

The crushing area is to be located and constructed within the partiallybackfilled void above the Ivanhoe No. 2 ventilation fan entry.

The out-of-pit spoil dumps of the former open cut is not be disturbed.

The extent of land disturbance / clearing in advance of project activities isto be limited to that required for a maximum of 3 to 4 months operations.

The visual impact of theproject will minimised.

The Project Site is to be maintained in a clean and tidy condition at alltimes.

6. Flora and Fauna‘No go’ areas for employees, vehicles and project equipment will be

designated outside nominated areas of disturbance.

Areas to be disturbed ahead of clearing activities will be clearly marked.

A pre-start inspection is to be carried out by a suitable person prior toremoval of hollow-bearing tree.

Areas to be cleared willbe minimised, clearlymarked and managed tominimise impacts on localfauna.

Felled or fallen timber is to be left on the ground outside the limit of theproject activities.

Provenance seed and propagation stock will be obtained from the ProjectSite prior to, or during, clearing.

The full range of tree species present in the local area will be planted aspart of rehabilitation activities to the extent practical.

Disturbed areas will be revegetated with a mix of tree, shrub and groundlayer species typical of the plant communities which previously existed.

Seed collection works will be scheduled such that sufficient viable seed andpropagation stock is available as the rehabilitation work proceeds.

Re-establishment of plantcommunities and faunahabitat of the pre-miningenvironment.

Prior to cessation of monitoring of rehabilitated landform, DPI(MR) to “sign-off” on the Proponent’s responsibility to maintain the area.

Surface water dams orponding areas to be keptfree of contaminants suchas fuel and oil.

See commitments for water resources.

Page 68: Ivanhoe Coal Pty Ltd...Ivanhoe Coal Pty Ltd (Ivanhoe Coal), a wholly owned subsidiary of Centennial Coal Pty Ltd, ... process and the role of water management within that coal handling

UPDATED STATEMENT OF COMMITMENTS 9 IVANHOE COAL PTY LIMITED8 September 2006 Ivanhoe North Rehabilitation Project Report No. 667/07

R. W. CORKERY & CO. PTY. LIMITED

Page 7 of 7Objective Environmental Commitment7. Soil Resources

The topsoil layer from SMU 1 is to be stripped to a depth of 15cm, and fromSMU 2 to a depth of 10cm.

Soil will stripped andstockpiled in order tomaximise its potential foruse in rehabilitation of theProject Site.

Handling when the soils are wet is to be avoided.

Topsoil stockpiles, when required, will not exceed 2m in height and, wherepractical, be maintained as windrows in preference to larger structures.

The formed stockpile surfaces will be left with a generally even surface thatis as ‘rough’ as possible, in a micro-sense, to assist in runoff control andseed retention and germination.

Stockpiles are to bemanaged in such a wayas to minimise the loss ofbiological activity andviability for use inrehabilitation. Driving of machinery on the topsoil and subsoil stockpiles, as well as the

respread soil, is to be kept to an absolute minimum.

Silt-stop fencing or similar is to be placed immediately down-slope ofstockpiles where required, until stable vegetation cover is established.Batter slopes to be ripped along contour and contour drains establishedwhere required.

Stockpiles are to bemanaged to reduce thepotential for erosion andsedimentation. A cover of previously cleared vegetation or mulch is to be spread over the

soil prior to seeding to aide in the establishment and maintenance of avegetative cover.

8. Aboriginal HeritageThe workforce is to be instructed to immediately cease work in the vicinityof any suspected or identified site or artefact until such time as themanagement of the site/artefact has been discussed with a DECarchaeologist and a representative of the Bathurst Local Land AboriginalCouncil.

The workforce willeducated to theirobligations andresponsibilities under theNational Parks andWildlife Act of 1974.

Monitoring is to be undertaken in response to the identification of anAboriginal site or artefact with the method to be determined throughconsultation with the DEC.

Page 69: Ivanhoe Coal Pty Ltd...Ivanhoe Coal Pty Ltd (Ivanhoe Coal), a wholly owned subsidiary of Centennial Coal Pty Ltd, ... process and the role of water management within that coal handling

Ivanhoe North Rehabilitation Project

Appendix B

Environmental Protection Licence 13063

Page 70: Ivanhoe Coal Pty Ltd...Ivanhoe Coal Pty Ltd (Ivanhoe Coal), a wholly owned subsidiary of Centennial Coal Pty Ltd, ... process and the role of water management within that coal handling

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Ivanhoe North Rehabilitation Project

Appendix C

‘Blue Book’ Standard Calculation Sheets

Clean Water Dams Nos.1 - 4

Sediment Dam No.1

Sediment Dam No.2

Sediment Dam No.3

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Ivanhoe North Rehabilitation Project

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Ivanhoe North Rehabilitation Project

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Ivanhoe North Rehabilitation Project

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Ivanhoe North Rehabilitation Project

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Ivanhoe North Rehabilitation Project

Appendix D

‘Blue Book’ Standard Design Drawings

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Ivanhoe North Rehabilitation Project

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Ivanhoe North Rehabilitation Project

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Ivanhoe North Rehabilitation Project

Appendix E

Proposed Mitigation Works forHighway Culvert Discharge Erosion

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Ivanhoe North Rehabilitation Project

Recommendation for Erosion Mitigation WorksThe source of the scour problem is external to Ivanhoe North and not related to the mining orrehabilitation works. Therefore a more permanent solution to the scouring is recommended.GHD propose the following works be undertaken to prevent further scouring of the drainagepath:

Fill up the scour hole with material sourced on location and shape the drainage path to aneven slope.

Construct two small anchor trenches along the sides of the drainage path. Place heavyduty Bidim A64 geofabric in the channel, tucking it into the anchor trenches and backfilltrench to secure geofabric.

Place rip-rap scour protection along the drainage path from the point where the waterenters the Ivanhoe North site (if possible from the culvert headwall) to below the existingscour hole.

The following is a suggested rock grading for the rip-rap:

Equivalent Spherical Diameter % of Rock of Smaller Size

400mmDIA (2 x D50) 100%

200mmDIA (D50) 50%

60 - 80mmDIA (0.3-0.4xD50) 10-20%

Minimum layer thickness to be 2 x D50, i.e. 400 mm.

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Appendix F

Surface Water Sample Locations

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Surface Water Sample Locations

Name Easting Northing Description

INW-2 223749.120 6308697.485 Historical monitoring location in the ‘spring’just north of the facilities area

SD-1 223431.567 6308413.829 Located on Stream 2, downstream ofdisturbed area

SD-2a 224142.439 6308868.293 Located on Stream 1, downstream of miningblocks Nth 03, Nth 04 & Nth 05

SD-2b 224155.869 6308737.296Located on Stream 1, downstream of miningblocks Nth 03, Nth 04 & Nth 05 next to thesite access road junction

SD-3 223988.328 6308777.578 Located downstream of Coal Crushing Area

CWD-1 224081.869 6308413.648 Located on Stream 1, upstream of the miningdisturbance area.

CWD-2 223798.398 6308455.421 Located on Stream 2, upstream of the miningdisturbance area.

CWD-3 223676.418 6308067.722 Located on Stream 3, upstream of the miningdisturbance area.

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Appendix G

Surface Water Monitoring Analytes

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Surface Water Monitoring AnalytesSite Quarterly Annually Discharge

Events

INW-2 pHECTotal oil & greaseSuspended solids

pH, EC, Total oil & grease.

TSS, TDS, Total hardness as CaCO3, HydroxideAlkalinity as CaCO3, Carbonate Alkalinity asCaCO3, Bicarbonate Alkalinity as CaCO3, TotalAlkalinity as CaCO3.

Calcium, Magnesium, Sodium, Potassium, Iron(filterable).

Bicarbonate, Carbonate, Sulfate as SO4 –Turbidimetric, Chloride, Nitrite as N, Nitrate as N,Nitrite + Nitrate as N, Total Phosphorus as P,Silica.

Aluminium (filterable), Antimony (filterable), Arsenic(filterable), Bismuth (filterable), Boron (filterable),Cadmium (filterable), Chromium (filterable), Cobalt(filterable), Copper (filterable), Lead (filterable),Manganese (filterable), Mercury (filterable), Nickel(filterable), Selenium (filterable), Strontium(filterable), Uranium (filterable), Zinc (filterable).

SD-1 pHECTotal oil & greaseSuspended solids

pH, EC, Total oil & grease.

TSS, TDS, Total hardness as CaCO3, HydroxideAlkalinity as CaCO3, Carbonate Alkalinity asCaCO3, Bicarbonate Alkalinity as CaCO3, TotalAlkalinity as CaCO3.

Calcium, Magnesium, Sodium, Potassium, Iron(filterable).

Bicarbonate, Carbonate, Sulfate as SO4 –Turbidimetric, Chloride, Nitrite as N, Nitrate as N,Nitrite + Nitrate as N, Total Phosphorus as P,Silica.

Aluminium (filterable), Antimony (filterable), Arsenic(filterable), Bismuth (filterable), Boron (filterable),Cadmium (filterable), Chromium (filterable), Cobalt(filterable), Copper (filterable), Lead (filterable),Manganese (filterable), Mercury (filterable), Nickel(filterable), Selenium (filterable), Strontium(filterable), Uranium (filterable), Zinc (filterable).

pHECTotal greaseSuspended solids

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Ivanhoe North Rehabilitation Project

Site Quarterly Annually DischargeEvents

SD-2 pHECTotal oil & greaseSuspended solids

pH, EC, Total oil & grease.

TSS, TDS, Total hardness as CaCO3, HydroxideAlkalinity as CaCO3, Carbonate Alkalinity asCaCO3, Bicarbonate Alkalinity as CaCO3, TotalAlkalinity as CaCO3.

Calcium, Magnesium, Sodium, Potassium, Iron(filterable).

Bicarbonate, Carbonate, Sulfate as SO4 –Turbidimetric, Chloride, Nitrite as N, Nitrate as N,Nitrite + Nitrate as N, Total Phosphorus as P,Silica.

Aluminium (filterable), Antimony (filterable), Arsenic(filterable), Bismuth (filterable), Boron (filterable),Cadmium (filterable), Chromium (filterable), Cobalt(filterable), Copper (filterable), Lead (filterable),Manganese (filterable), Mercury (filterable), Nickel(filterable), Selenium (filterable), Strontium(filterable), Uranium (filterable), Zinc (filterable).

pHECTotal greaseSuspended solids

SD-3 pHECTotal oil & greaseSuspended solids

pH, EC, Total oil & grease.

TSS, TDS, Total hardness as CaCO3, HydroxideAlkalinity as CaCO3, Carbonate Alkalinity asCaCO3, Bicarbonate Alkalinity as CaCO3, TotalAlkalinity as CaCO3.

Calcium, Magnesium, Sodium, Potassium, Iron(filterable).

Bicarbonate, Carbonate, Sulfate as SO4 –Turbidimetric, Chloride, Nitrite as N, Nitrate as N,Nitrite + Nitrate as N, Total Phosphorus as P,Silica.

Aluminium (filterable), Antimony (filterable), Arsenic(filterable), Bismuth (filterable), Boron (filterable),Cadmium (filterable), Chromium (filterable), Cobalt(filterable), Copper (filterable), Lead (filterable),Manganese (filterable), Mercury (filterable), Nickel(filterable), Selenium (filterable), Strontium(filterable), Uranium (filterable), Zinc (filterable).

pHECTotal greaseSuspended solids

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Discharge VolumePart M6 of EPL-13063 requires the monitoring of the volume of liquids discharged to water orapplied to the area on a daily basis in kilolitres per day by means of calculation (volume flowrate or pump capacity multiplied by operating time.

Ivanhoe North monitors flows from SD-1, SD-2a&b (future) and SD-3 and report on thevolume of water discharged from these dams.

Quality Criteria ObjectivespH 6.5 – 8.5;

Electrical conductivity <1 500 s/cm;

Total grease <10mg/L; and

Suspended solids <50mg/L.

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Appendix H

SWMP Document History

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Ivanhoe North Rehabilitation Project

Document History

This Document

Details Ivanhoe North Rehabilitation Project Revised Surface Water Management Plan - REVISION 3

Status Issued for implementation in July 2010

Revision Table

Details of Revision Reviewer Authorised by Date CirculationSWMPRevision

Document Title Revision to:

1 Ivanhoe North Rehabilitation ProjectSite Water Management PlanDoc Ref No. INRP-SWMP-66708aORIGINAL

Original SWMPDocument

Barry McMahonProject Environmental

Coordinator

Neil LarcombeManager of Mining

Engineering

Jun 08

2 Ivanhoe North Rehabilitation ProjectSite Water Management PlanDoc Ref No. INRP-SWMP-66708aREVISION 2

Sections Only

Barry McMahonProject Environmental

Coordinator

Neil LarcombeManager of Mining

Engineering

Feb 09

3 Ivanhoe North Rehabilitation ProjectRevised Surface Water Management PlanREVISION 3

Whole DocumentRob Hunt

Environment &Community Coordinator

Neil LarcombeCentennial SiteRepresentative

Jun 10

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Appendix I

References and Associated Documents

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List of References and Associated Documents

Legislation, Licences and other ApprovalsProtection of the Environment Operations Act 1997 (NSW) (POEO Act), Department ofEnvironment, Climate Change and Water (DECCW).

Environmental Planning and Assessment Act 1979 (NSW) (EP&A Act), Department ofPlanning (DoP).

Water Management Act 2000 (NSW) (WMA), Office of Water (OW).

Water Act 1912 (NSW), Office of Water (OW).

Dams Safety Act 1978 (NSW), Dams Safety Committee.

Coal Mines Health and Safety Act 2002 (CMHS Act), Department of Industry andInvestment (DII).

Occupational Health and Safety Act 2000 (OHS Act), WorkCover Authority.

Project Approval PA 05_0103, Department of Planning (DoP) (11 April 2007). SeeAppendix A.

Environment Protection Licence Number 13063 (EPL 13063), 24 April 2009, DECCW.

GuidelinesANZECC/ARMCANZ Australian and New Zealand Guidelines for Fresh and Marine WaterQuality, 2000, Department of Environment, Water, Heritage and the Arts (DEWHA).

Water Quality - Sampling. Guidance on the Design of Sampling Programs, SamplingTechniques and the Preservation and Handling of Samples, AS/NZS 5667, 1998,DEWHA.

Australian Rainfall and Runoff: A Guide to Flood Estimation - Volumes 1 and 2, 1998,Institute of Engineers.

Approved Methods for the Sampling and Analysis of Water Pollutants in New SouthWales, 2004, DECCW.

Landcom 2004b, Managing Urban Stormwater: Soils and Construction Volume 1, 4th

Edition March 2004, NSW.

Department of Environment and Climate Change, 2008 Managing Urban StormwaterVolume 2E Mines and Quarries.

ReportsGSS Environmental, Ivanhoe North Rehabilitation Project – Surface Water Assessment,Report No. 667/03 (January 2006).

RW Corkery & Co. Pty. Ltd., Ivanhoe North Rehabilitation Project – Site WaterManagement Plan, Report No. INRP-SWMP-66708a, Revision 2 (February 2009).

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