Christmas Creek Groundwater Operating Strategy Water ... · Christmas Creek Groundwater Operating Strategy Page 7 of 94 CC-PH-HY-0003_Rev0. 1. INTRODUCTION The Cloudbreak mine (Cloudbreak)

Christmas Creek Groundwater Operating Strategy

Water Management

28/06/2013 CC-PH-HY -0003

• Fortescue The New Force in Iron Ore

Christmas Creek Groundwater Operating Strategy

CC-PH-HY -0003_Rev0

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Christmas Creek Groundwater Operating Strategy CC-PH-HY-0003

Revision Number REVO

28/06/2013 Status IFU -ISSUED FOR USE

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€fr 2f6/bl /3 Author Paul Ricketts A " i s· r(!i

Checked Jardin Barclay ~ lrl/6(13

Approved Bobak Willis-Jones '(SJ\,~ ) . 28/b/13 Signalure

PUBLIC USE (ACCESS TO D Yes Confidentiality

ALL) Publish on Extranet

1:8:1 No

Review Date

Revision History

Author Checker Approver Rev

Status Issued Date No.

P Ricketts J Barclay B Willis-Jones 0 IFU 28/06/2013

•11 Fortescue~

Christmas Creek Groundwater Operating Strategy Page 3 of 94

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TABLE OF CONTENTS

1. INTRODUCTION .............................................................................................................. 7

1.1 Background ......................................................................................................... 7

1.2 Approvals ............................................................................................................. 8

1.3 Document Scope ................................................................................................. 8

2. ADMINISTRATIVE REQUIREMENTS ........................................................................... 11

3. CHRISTMAS CREEK OPERATING PLAN .................................................................... 13

3.1 Project Development ........................................................................................ 13

3.2 Dewatering System ........................................................................................... 13

3.3 Conveyance System ......................................................................................... 14

3.3.1 Transfer and settlement ponds .............................................................. 14

3.3.2 Bulk flow and conveyance ..................................................................... 14

3.4 Water Supply System ....................................................................................... 14

3.4.1 Ore processing and tailings ................................................................... 15

3.4.2 Dust suppression................................................................................... 15

3.5 Injection System ................................................................................................ 15

3.5.1 Brackish injection .................................................................................. 15

3.5.2 Saline injection ...................................................................................... 15

3.6 Christmas Creek Village water system and potable water system .............. 16

3.7 Contingency Operations .................................................................................. 16

3.7.1 Alternative Water Supply ....................................................................... 16

3.7.2 Cloudbreak and Christmas Creek Connectivity ..................................... 16

3.7.3 Water supply optimisation ..................................................................... 16

3.7.4 Water level optimisation ........................................................................ 17

4. OPERATING RULES ..................................................................................................... 18

4.1 Mine water balance ........................................................................................... 18

4.2 Abstraction Licence Allocation ....................................................................... 19

4.3 Injection Licence Allocation ............................................................................. 19

5. WATER INFRASTRUCTURE MONITORING, CONTROL AND MAINTENANCE ........ 20

5.1 Monitoring and controls ................................................................................... 20


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5.1.1 Bulk pipelines and storage ponds ......................................................... 20

5.1.2 Leak detection ....................................................................................... 20

5.2 Maintenance schedule ...................................................................................... 20

6. DEWATERING/INJECTION SYSTEM MONITORING PROGRAM ............................... 21

7. ENVIRONMENTAL IMPACT MANAGEMENT .............................................................. 23

7.1 Potential environmental impacts ..................................................................... 23

7.1.1 Overall environmental management approach ..................................... 23

8. TRIGGER LEVELS AND CONTINGENCY PLANS ....................................................... 24

8.1 Project zoning ................................................................................................... 24

8.2 Two-tiered trigger level system ....................................................................... 24

8.3 Framework for selecting appropriate trigger values ..................................... 25

8.3.1 Groundwater level and EC triggers ....................................................... 25

8.3.2 Near-marsh water level assessment ..................................................... 25

8.4 Trigger Level Response ................................................................................... 29

8.5 Contingency plans ............................................................................................ 30

8.5.1 Insufficient brackish water ..................................................................... 30

8.5.2 Insufficient injection capacity ................................................................. 30

9. EFFICIENT WATER USE INITIATIVES ......................................................................... 31

10. MANAGEMENT COMMITMENTS SUMMARY .............................................................. 32

11. REFERENCES ............................................................................................................... 37

12. GLOSSARY .................................................................................................................... 38


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List of Tables

Table 1: Key regulatory issues addressed in the Operating Strategy ..................... 9

Table 2: Scope changes for this Operating Strategy ............................................... 10

Table 3: Administrative requirements ....................................................................... 11

Table 4: Reporting requirements ............................................................................... 11

Table 5: Summary site water balance ....................................................................... 18

Table 6: Groundwater abstraction licence details ................................................... 19

Table 7: Groundwater injection licence details ........................................................ 19

Table 8: Christmas Creek monitoring summary ...................................................... 21

Table 9: Near marsh bore assessment process ....................................................... 26

Table 10: Trigger level framework ............................................................................... 27

Table 11: Summary of licensee’s commitments ........................................................ 32

Table 12: Environmental Impact Management ........................................................... 33


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LIST OF FIGURES

Figure 1: Regional location plan .................................................................................... 39

Figure 2: Existing Christmas Creek water management infrastructure ......................... 41

Figure 3: Hydrogeological section ................................................................................. 43

Figure 4: Regional production bores .............................................................................. 45

Figure 5: Injection locations ........................................................................................... 47

Figure 6: Monitoring location plan .................................................................................. 49

Figure 7: Christmas Creek trigger level zones and bores .............................................. 51

LIST OF APPENDICES

Appendix 1: Groundwater abstraction licence

Appendix 2: Tenements

Appendix 3: No pit-region abstraction bore details

Appendix 4: Pit region abstraction bore setup

Appendix 5: Injection bore details

Appendix 6: Proposed abstraction rates at Christmas Creek

Appendix 7: Christmas Creek conceptual water balance

Appendix 8: Monitoring locations

Appendix 9: Project trigger levels

Appendix 10: Trigger reporting procedure


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1. INTRODUCTION

The Cloudbreak mine (Cloudbreak) and Christmas Creek mine (Christmas Creek) are located

on the southern slopes of the Chichester Range and north of the Fortescue Marsh. Collectively,

the two mine sites are referred to as the Chichester Operations. This Groundwater Operating

Strategy (OS) relates to Christmas Creek only, for further details on operations at Cloudbreak,

approximately 30 km west of Christmas Creek mine (Figure 1), see Cloudbreak Groundwater

Operating Strategy (FMG, 2012).

1.1 Background

The water quality in the Christmas Creek area (between the Fortescue Marsh and Chichester

Range) is variable due to the influence and mixing of both topographic-driven Chichester Range

brackish water and density driven Fortescue Marsh-saline water. Groundwater in the resource

area is generally brackish and becomes increasingly saline towards the Fortescue Marsh and

with depth, as shown in Figure 3. Based on the water quality distribution and beneficial use

considerations, two classes of groundwater quality are defined for the purpose of groundwater

management:

Brackish: ≤60001 milligrams per litre (mg/L), total dissolved solids (TDS), which occurs in shallow aquifer zones within the mineralised Marra Mamba Formation (MMF) and overlying Tertiary Detritals sediments located on the upper slopes of the Chichester Range.

Saline - hypersaline: ≥6000 mg/L to 150,000 mg/L TDS, where the lower limit applies to recharge areas, with an increase in salinity within all aquifers found further south and at greater depth. The aquifer within the Oakover Formation, which overlies the MMF to the south of the resource area, is entirely of saline quality (monitored up to 150,000 mg/L).

Dewatering and injection activities commenced at Christmas Creek in 2011. Groundwater is

abstracted under Department of Water (DoW) 5C licence GWL167593. This OS supersedes

the previous version dated 21 May 2012 and has been updated to document compliance,

monitoring and reporting requirements relating to the water management scheme as specified

by DoW (RIWI & Policy 5.08). Where applicable parallel licencing and statutory requirements

are also referenced (DEC (L8454/2010/1) and EPA (MS871)). It is the intention, that through

this OS, abstraction and injection volumes be aligned with MS871 (50 gigalitres per annum

(GL/a) of dewatering and up to 42.5 GL/a of groundwater injection).

To assist in managing the operational requirement of additional dewatering, the Christmas

Creek Water Management Scheme has been developed with the following objectives:

manage excess groundwater;

1 Up to 10,000 mg/L in certain end-use situations such as OPF use. 6,000 mg/l is approximately equal to 9,000 µs/cm, 10,000 mg/l is approximately equal to 14,000 µs/cm.


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minimise potential environmental impacts; and

conserve the groundwater resource.

The key component of this scheme is the disposal of abstracted water via injection into nearby

suitable aquifers.

Further updates to the OS will be in accordance with any approved changes required by the

DoW or as a result of a significant change to the development and operation of the Christmas

Creek water management scheme.

1.2 Approvals

Fortescue Metals Group Limited (Fortescue) has commenced operation of the Pilbara Iron Ore

and Infrastructure Project (the Project), which consists of several iron ore mines and associated

rail and port infrastructure in the Pilbara region of Western Australia (Figure 1). The primary

environmental approvals for the Project have been obtained for the following:

two iron ore mines in the eastern Pilbara (Christmas Creek and Mindy Mindy) and an east-west spur rail line connecting to the Stage A railway (approved under Ministerial Statement 707);

Christmas Creek iron ore mine (approved under Ministerial Statement 707 (MS707)); and

the water management scheme (approved under Ministerial Statement 871 (MS871).

1.3 Document Scope

This document outlines the planned operation of dewatering, injection and water supply

systems at the Christmas Creek Mine and the management systems that will be employed to

monitor and mitigate potential impacts. This OS is anticipated to be relevant for a period of 12

months from the date of approval.

Fortescue is required to produce a detailed OS due to the Project operating in an

environmentally sensitive area and its large water allocation. The OS has been prepared to

meet the requirements of Operational Policy 5.08 Use of Operating Strategies in the Water

Licensing Process (DoW, 2010) and ensure monitoring and compliance requirements specified

in Part IV and Part V approvals are addressed. The relevant issues highlighted in the DoW 2010

policy and Part IV and Part V approvals and the corresponding sections of this OS that address

each issue are outlined in Table 1. Scope changes from the previous revision of the OS are

presented in Table 2.


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Table 1: Key regulatory issues addressed in the Operating Strategy

Operating Strategy Key Regulatory Issues Addressed

1. Introduction Outlines the scope of operations including abstraction and injection volumes.

RIWI - Addresses administrative requirements (Section 1) of DoW Policy 5.08.

2. Administrative Requirements

Provides details of key personnel responsible for implementation of the operating strategy and the key reporting deliverables and frequencies.

RIWI - Addresses administrative requirements (Section 1) of DoW Policy 5.08.

Part IV - MS871 – Conditions 6.3, 6.4, 6.6, 7.3, 7.4, 7.6, and 10.4.

Part V - L8454/2010/1 – DEC CCWMS requirements.

3. Christmas Creek Operating Plan

Provides a high level outline of the water management scheme and key definitions.

RIWI - Addresses administrative requirements (Section 1) and Water source description (Section 2) of DoW Policy 5.08.


4. Operating rules Outlines how the water management scheme will be operating in order to comply with existing regulatory requirements and provides an overview of project development.

RIWI - Addresses the water source description (Section 2) and monitoring and reporting (Section 5) requirements of DoW Policy 5.08.

Part IV - MS871 – Conditions 6.1, 7.1, 8.1, and 10.1.

Information required for the Department of Environment and Conservation (DEC) to assess the works in accordance with Part V of the Environmental Protection Act 1986 (EP Act) are included in the Water Management Scheme Document (FMG2013).

5. Water Infrastructure Monitoring, Control and Maintenance

Sections 5 & 6 outline the monitoring and control measures which are in place to ensure continued operation and compliance of the system. Details are also provided of the locations, parameters and frequency of monitoring across the whole system.

RIWI - Addresses the identifying and managing impacts (section 3) and monitoring and reporting (Section 5) requirements of DoW Policy 5.08.

Part IV - MS871 – Conditions 6.2, 7.2.


6. Groundwater Monitoring Programme

7. Environmental Impact Management

Outlines the potential environmental risks associated with the project and mitigation measures which are in place to ensure compliance with regulatory guidelines.

RIWI - Addresses the identifying and managing impacts (Section 3) and environmental impact management (Section 6) requirements of DoW Policy 5.08.

Part IV - MS871 – Conditions 6.1, 7.1, 8.1, and 10.1.


8. Trigger levels and Contingency Plans

Outline the rational and logic for the monitoring network, the methodology for assessment and reporting procedure for exceedances. Contingency plans are also discussed to ensure impacts are mitigated.

RIWI - Addresses the monitoring and reporting (Section 5) and the contingency programme (Section 7) requirements of DoW Policy 5.08.

Part IV - MS871 – Conditions 6.1, 6.4, 7.1, 7.2, 7.4, 8.1, 10.1, and 10.4.


9. Efficient Water Use Initiatives

Water efficiency initiative, currently in place and proposed, are presented.

RIWI - Addresses the water use efficiency (Section 9) requirements of DoW Policy 5.08.

10. Management Commitments Summary

Summary of environmental commitments presented in this document.

Addresses the summary of licensee’s commitments (Section 12) of DoW Policy 5.08.

Part IV - MS871.



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Table 2: Scope changes for this Operating Strategy

Scope Change Description

Addition of Hillside East Hillside East is now covered by this OS and has been removed from the Cloudbreak Water Management Scheme Operating Strategy (FMG, 2012a).

Improvements to trigger network .

(Sections 7 and 9)

Shallow near-marsh bores have been assigned new Class 1 triggers to align with MS871 (see Section 8.3.2).

Deep near-marsh bores no longer have a Class 1 trigger as the influence of saline injection is realised. Locations will still be monitored and assessed monthly to ensure water level variation is in line with predictions.

All new saline injection area monitoring bores have been assigned water level and (where applicable) quality triggers (previously, only a selection of saline injection area monitoring bores were included in the trigger network).

The Class 1 trigger for monitoring bores in the deep saline injection area have been amended to 2.2mbgl to allow greater operational flexibility. Deep monitoring bores are used to control flow rate into associated injection bores, probes are calibrated to automatically shut injection units down if water level in the adjacent monitoring bore reaches 2.2mbgl.

Zone A now extends from the northern fringe of Fortescue Marsh to the 410 m elevation contour to reflect the positioning of monitoring sites outlined in MS871.

Brackish injection bulk flow has now been assigned a Class 1 trigger of 9,000 µS/cm. This is to ensure the quality of brackish injection is monitored and controlled (Section 9).

Zone B monitoring bores screening the shallow aquifer (alluvium and Tertiary Detritals) have been assigned Class 1 water quality triggers, to increase brackish aquifer monitoring. (Section 9).

Addition of new injection pipeline sample points

A number of previously monitored samples points have now become redundant or no longer exist. Additional injection pipelines have also been constructed since the last OS. As a result, a new list of representative injection sample points has been compiled (Section 6).

Addition of pastoral bores Pastoral bores that are currently being monitored have been included (see Section 6).

Alignment of monitoring to licence requirements

Monitoring commitments have been aligned to ensure EPA, SEWPaC and DEC requirements relating to brackish and saline injection are adhered to (see Section 6 and 8).

Chemical sampling Bores sampled biannually for chemical analysis have been listed and analytes specified.


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2. ADMINISTRATIVE REQUIREMENTS

Christmas Creek currently operates under a Ground Water Licences (GWLs) to abstraction an

allocation of 48 GL/a (Appendix 1). Through the production of this document, Fortescue is

seeking approval under the Rights in Water and Irrigation Act 1914 (RIWI Act) to operate the

system at Christmas Creek, abstracting up to 50 GL/a from existing mining areas and injecting

up to 42.5 GL/a at locations to south of the mining area (saline), and to the Hillside East and

Spinifex Pigeon borefields (brackish).

The required administrative arrangements to ensure compliance with this OS are outlined below

in Table 3.

Table 3: Administrative requirements

Requirement Administrative Arrangement

Duration 12 months from the date of approval

Contact details of persons responsible for implementation of this document

Mining Services Manager, Utilities Department, Christmas Creek

Mr Wally Lombard

[email protected]

Definition of water year 1 August – 31 July

Reporting commitments See Table 4

Review As required

Reporting will be conducted as outlined in Table 4. The reports will be prepared in accordance

with the Operational Policy 5.08 in Use of Operating Strategies in the Water Licensing Process

(DoW, 2010).

Table 4: Reporting requirements

Frequency Content

Quarterly monthly monitoring data, including groundwater levels, water quality and abstraction and injection volumes;

groundwater trigger level compliance;

groundwater level contour plans; and

any proposed changes to groundwater management.

Annual2 a compilation and hydrogeological assessment of the quarterly report data;

an assessment of the borefield operation’s compliance with the Groundwater Licence (GWL) terms and conditions;

2 Fortescue’s Environment Team is also required to produce an Annual Environmental Report for the DEC and EPA by 31st March each year. This is to include an assessment of groundwater monitoring data and monthly monitoring/assessment of the near marsh bores (MS871) as described in Section 9.3.2 of this OS. Quarterly and annual aquifer review reports will be utilised to satisfy the requirements of this reporting.


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Frequency Content

an assessment of the borefield operation’s compliance with the OS commitments;

any proposed changes to groundwater management and the OS;

a description of the effectiveness and accuracy of the monitoring program (where appropriate); and

the submission of the report to the Department of Water annually within two months of the completion of the water year.

Triennial

The Triennial Aquifer Review will be submitted in place of the Annual Aquifer Review discussing the data for the previous three-year period in greater detail. This review will:

place more emphasis on historical trends and anomalies; and

to be submitted every three years to the Department of Water within two months of the completion of the relevant water year, with the next Triennial review due in 2013.

As required Trigger level exceedances will be reported to the DoW, EPA, SEWPaC and DEC as outlined in Section 9.

In addition to the external reporting requirements detailed in Table 4, Fortescue also completes

numerous internal assessments of hydrogeological data in relation to short term mining plans


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3. CHRISTMAS CREEK OPERATING PLAN

Groundwater is abstracted from dewatering borefields to enable dry pits, to provide water for

mine dust suppression, ore processing, civil works and potable water supply for the Mine

Village. Excess groundwater abstracted from the dewatering operation is injected into suitable

aquifers (managed aquifer recharge (MAR)), in accordance with the Operational Policy 1.01

Managed Aquifer Recharge in Western Australia (DoW, 2011).

3.1 Project Development

The location of existing water infrastructure is shown on Figure 2. A high level description of the

system is provided below. Water infrastructure has been and will be developed to meet the

needs of the business, the environment and stakeholders whilst aiming to maximise flexibility in

operations. Planned expansion of the dewatering and injection system over the next 12-18

months is outlined in the Christmas Creek Water Management Scheme (FMG 2013).

3.2 Dewatering System

The dewatering system includes up to three water streams: the brackish, the saline and sump

water. Separate systems exist for both brackish and saline dewatering systems. Dewatering

bores and interconnecting pipelines are located along mine pit perimeters and in some cases

within mine pits.

For the purpose of this OS groundwater abstraction bores are classified as:

General purpose water supply bores: bores establised for purpose of dust suppression and construction purposes (Appendix 3)

Potable water supply bores: bores established for purpose of potable water supply only (Appendix 3)

Pit dewatering bores; bores established for purpose of mine dewatering. These bores generally have a short life span.

This differentiation is adopted based on the short life of dewatering, whereby pit-region bores

can be ‘mined out’ (decommissioned) within about six months, rendering a list of pit-region

bores out of date before it is published. Fortescue’s pit-region dewatering methodology and set-

up is described in Appendix 4. The tenements from which water will be abstracted and used

are highlighted in Appendix 2.

The location of regional abstraction bores are shown on Figure 4. More detailed information on

the hydrogeology of the Christmas Creek area can be found in the Hydrogeological Assessment

for the Christmas Creek Water Management Scheme (FMG, 2010) produced as part of primary

approvals.


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3.3 Conveyance System

The conveyance system is designed to move water across the site from areas of abstraction

(dewatering system) to areas of injection (injection system) or use (water supply system). Water

is conveyed through separate brackish, saline and sump pipelines via ponds.

3.3.1 Transfer and settlement ponds

Transfer ponds and settlement ponds consist of water storage facilities for the purpose of

facilitating bulk flow transfer and/or settlement of suspended material. Separate facilities exist

for handling of brackish, saline and sump water.

3.3.2 Bulk flow and conveyance

Pipeline sizes and routes have been designed to:

optimise hydraulic performance in combination with pump duties;

meet connectivity requirements; and

comply with relevant regulatory approvals and licence requirements.

3.4 Water Supply System

Average predicted water demand throughout the next 12 month period is expected to be

relatively constant. Maximum annual water demand is estimated to be up to 15 GL/a (480 L/s).

Given the climatic variation within the Pilbara (directly related to dust suppression) and the

variable operational requirement, actual operational water demand is likely to range between 4

GL/a and 15 GL/a (for water balance purposes 7.5 GL/a has been used).

Water for mine use is principally derived from the dewatering operation. However, given

uncertainty of abstracted water quality a number of alternate supply sources have been

established, including:

Inter-mine transfer movement of surplus water between the Cloudbreak and Christmas

Creek mine sites to manage supply/demand at a Chichester scale. This will allow

Fortescue to minimise groundwater abstraction across operations.

Managed aquifer recharge (MAR): water previously injected into brackish injection borefields will be recovered by abstracting water from existing or newly constructed abstraction locations.

Other borefields: utilise existing production bores (not for active dewatering) across Christmas Creek to supplement water demand.


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3.4.1 Ore processing and tailings

A bulk flow conveyance line delivers water to process water ponds adjacent to the OPF for use

in ore processing operations. The transfer ponds receive raw water from the brackish

conveyance system and from the tails decant water.

Supernatant water from tailings is/will be collected using decant systems such as decant towers

and returned to the system via water infrastructure for reuse across the site.

3.4.2 Dust suppression

For dust suppression, water cart fill points are maintained across the Christmas Creek area.

These systems are supplied by the water conveyance system. A pump and standpipe assembly

is used to fill the water trucks.

3.5 Injection System

Excess groundwater abstracted from the dewatering operation is returned to compatible

aquifers by injection methods in accordance with the DoW’s Operational Policy in Managed

Aquifer Recharge (DoW, 2011). Injection systems consist of networks of injection bores and

interconnected pipelines. Water is injected to the bore via a downhole flow control valve, which

eliminates air from entering the bore. Details of bores used for injection are presented in

Appendix 5. The location of injection bores are displayed in Figures 5.

3.5.1 Brackish injection

Aquifer storage via injection is undertaken with brackish water in areas east and west of the

active mining area and typically targets the Marra Mamba Formation (MMF). There are currently

two areas identified for brackish injection: the Hillside East and Spinifex Pigeon injection

borefields.

3.5.2 Saline injection

Saline injection is undertaken between the southern limit of the resource area and the northern

limit of the Fortescue Marsh. The Oakover Formation is the target aquifer of the injection. The

Oakover Formation has high transmissivity due to the presence of calcretes and silcretes.

The saline network is being developed and expanded to meet the increasing injection

requirement, outlined in the Christmas Creek Water Management Scheme (FMG 2013).


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3.6 Christmas Creek Village water system and potable water system

At the camp, potable water supply is treated at the camp RO plant and is sourced from four

local bores CCCP01, CCCP02, CCCAP03 and CCCAP04. Currently, the water is stored in a

separate tank and fed across the mine via an independent distribution network.

At the mine, a water treatment facility is located adjacent to the process water tanks for

treatment of water for potable use. Potable water is stored in a separate tank and fed across the

mine via its own distribution network.

3.7 Contingency Operations

3.7.1 Alternative Water Supply

Moving forward, with continuing increase in salinity of water from the dewatering system,

additional options may be required to ensure suitable water supply to operations. These

options may include;

External borefield: consideration for a long term (life of mine) abstraction borefield remote to operations; or

Reverse osmosis (RO): On-site RO plant which will reduce the salinity of abstracted water for ongoing brackish supply.

3.7.2 Cloudbreak and Christmas Creek Connectivity

The integration of Christmas Creek and Cloudbreak water systems offers significant opportunity

to address optimisation of water management at the Chichester operations to meet both

operational and environmental objectives. This optimisation is delivered through operational

planning and review. Two key areas identified for optimisation are: conservation of the brackish

water resource and management of water levels.

3.7.3 Water supply optimisation

Operations and activities at Christmas Creek require low EC, brackish water. As dewatering

operations progress abstracted water is becoming increasingly saline. If the water management

strategy described above is unable to supply a sufficient source of brackish water for

operations, a series of contingency water supply programmes have been developed, including

the transfer of water between adjacent mine sites, see Section 3.7.1.


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3.7.4 Water level optimisation

The water management strategy utilises groundwater injection as the main destination for

excess water from operations. For compliance reasons (water level and volume limits), if

injection capacity is limited or reduced, the following contingency measures will be

implemented:

blend water within system to allow alternative use/disposal route;

transfer water between sites3;

review mine plan to reduce dewatering requirement; and

discuss with regulatory authorities potential to increase injection volume.

Both of Fortescue’s Chichester Range mines (Cloudbreak & Christmas Creek) are designed to

operate independently. However, the contingency to transfer water between sites will not only

improve operational flexibility but also allow increased environmental protection to the Marsh.

3 Primary approval for this activity is currently being sought. The distribution of saline water for injection purposes will not commence until all approvals are in place.


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4. OPERATING RULES

For the purpose of this document, operating rules describe:

The planned water balance in terms of volumes and water quality for the duration of the OS;

Abstraction licence allocation requirements; and

Injection licence allocation requirements.

Specific requirements with regards to the groundwater and infrastructure monitoring and maintenance requirements are detailed in Section 5 and Section 6, respectively.

4.1 Mine water balance

Bores are operated in accordance with the terms and conditions of the relevant 5C licence

(Section 2). Abstraction during the respective licence periods is undertaken within the

prescribed annual water entitlement. Proposed water abstraction and usage rates for Christmas

Creek mine are presented in Appendix 6 and a conceptual mine water balance is presented in

Appendix 7. A summary tabular water balance for the site is provided in Table 5.

Table 5: Summary site water balance

Water Year Date

Dewatering System Water Supply System Injection System

Abstraction Rate (ML/d)

Cumulative Volume (ML)

Consumption Rate (ML/d)


Injection Rate (ML/d)


20

13

Jul-3 126 34,000 21 10,368 105 23,631

201

4

Aug-13 112 3,368 21 625 91 2,743

Sep-13 113 6,743 21 1,250 92 5,493

Oct-13 103 9,818 21 1,875 82 7,943

Nov-13 103 12,893 21 2,500 82 10,393

Dec-13 103 15,968 21 3,125 82 12,843

Jan-14 163 20,843 21 3,750 142 17,093

Feb-14 163 25,718 21 4,375 142 21,343

Mar-14 163 30,593 21 5,000 142 25,593

Apr-14 163 35,468 21 5,625 142 29,843

May-14 163 40,343 21 6,250 142 34,093

Jun-14 163 45,218 21 6,875 142 38,343

Jul-14 159 50,000 21 7,500 139 42,500


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4.2 Abstraction Licence Allocation

Details for the Ground Well Licences (GWLs) are listed in Table 6 and a copy of the existing

licence is presented in Appendix 1.

Table 6: Groundwater abstraction licence details

Licence No Area Purpose Aquifer Allocation (GL/a) Expiry Date

GWL 167593 Christmas Creek

Dewatering and site usage

East Pilbara Hamersley -Fractured Rock

48 11 July 2013

This OS requests that the allocation under GWL167593 be increased to 50GL/a in line with

Ministerial statement 871.

4.3 Injection Licence Allocation

The injection of surplus brackish and saline groundwater at Christmas Creek is licensed by the

Department of Environment and Conservation (DEC). Details of the DEC groundwater injection

licence are presented in Table 7. This OS reflects a recent request that the allocation under

L8454/2010/1 be increased to 42.5 GL/a in line with Ministerial statement 871.

As part of Fortescue’s DEC licence commitments, selected monitoring bores in the brackish

(Zone C) and saline (Zone B) injection areas have been assigned relevant Class 1 and 2

triggers (see Section 7 and 9).

Table 7: Groundwater injection licence details

Licence no. Area Purpose Allocation (GL/a) Expiry date

L8454/2010/1 Christmas Creek

Injection of surplus groundwater

30 22 August 2015

Details of brackish and saline injection bores operated at Christmas Creek are outlined in

Appendix 5 and locations presented in Figure 5


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5. WATER INFRASTRUCTURE MONITORING, CONTROL AND MAINTENANCE

5.1 Monitoring and controls

Fortescue monitors abstraction, injection and water consumption via a network of flow meters at

abstraction and injection bores, sumps, pipelines, water-use points and transfer ponds.

Fortescue uses telemetry and automated data collection in conjunction with electromagnetic

flow meters and downhole water level sensors for critical infrastructure. The automated and

telemetry systems are currently being further developed to assist with operational control and

monitoring of all appropriate water systems. Initial development is anticipated to be complete

by June 2014.

5.1.1 Bulk pipelines and storage ponds

Valves are regularly installed along bulk lines to allow for isolation of sections should damage

occur, or for maintenance activities. Flow meters and pressure gauges in the transfer pipelines

provide the ability to assess leak detection. Flow meters located throughout the water delivery

and distribution network are installed in accordance with the DoW Guidelines for Water Meter

Installation (DoW, 2009).

5.1.2 Leak detection

Leak detection is undertaken via regular visual inspections of pipework, ponds and fittings.

Comparison of meter readings at various points between abstraction and consumption points

are used to identify losses from the system.

5.2 Maintenance schedule

The following maintenance schedules have been implemented:

All water storage facilities and water conveyance infrastructure are inspected daily by the maintenance personnel, checking for water leaks, controls and condition of containment dams4. Problems are rectified as they arise; and

flow meters on all bores are tested to accuracy and calibrated by in-situ validation, twice a year or as per manufacturer specifications

4 The frequency of inspections will be reviewed with the implementation of telemetry systems and completed as appropriate.


CC-PH-HY-0003_Rev0.

6. DEWATERING/INJECTION SYSTEM MONITORING PROGRAM

The Mining Services team are responsible for monitoring as outlined in Table 8. The locations of

monitoring sites are shown on Figure 6. Monitoring bore locations, not included on the trigger

network, are provided in Appendix 8.

In addition to the monitoring summary outlined in Table 8 additional near pit monitoring is

undertaken at frequencies ranging from daily to weekly to assess the success and ongoing

requirements for dewatering operations.

Table 8: Christmas Creek monitoring summary

Frequency Monitoring parameter Comments Monitoring locations

Injection Pipelines

Daily Visual inspection

As a DEC requirement, injection pipelines are visually inspected daily, monitored monthly for EC and flow rate, and sampled biannually.

Active10 injection pipeline infrastructure

Monthly Field electrical conductivity

See Appendix 8

Volumes

Biannual5

Chemical analysis.

Major ions: (Na, K, Ca, Mg, Cl, alkalinity, SO4 and NO3),

Metals: (Al, B, Fe, Cu, Zn, Ag, As, Cr, Pb, Cd, Hg, Ni, Sn, Se, Mn),

Electrical conductivity, field pH, lab pH, total dissolved solids and total suspended solids.

Abstraction & Injection Bores

Monthly

Field electrical conductivity Bore head works will be equipped with water quality measurement points Active

production/injection bores

Volumes Via bore meter data

Bore status (flow) If the bore is currently operational

Monitoring Bores

Monthly

Groundwater level monitoring For drawdown/mounding assessments

See Appendix 9

Field electrical conductivity At a designated measurement depth

Biannual5

Chemical analysis.

Major ions: (Na, K, Ca, Mg, Cl, alkalinity, SO4 and NO3),

Metals: (Al, B, Fe, Cu, Zn, Ag, As, Cr, Pb, Cd, Hg, Ni, Sn, Se, Mn),

Electrical conductivity, field pH,

As a DEC requirement and to assist in characterising hydrogeological conditions.

See Appendix 8

5 Biannual samples are collected nominally in February and August.


CC-PH-HY-0003_Rev0.

Frequency Monitoring parameter Comments Monitoring locations

lab pH, total dissolved solids and total suspended solids

Water Use Volumes

Monthly

Meter readings for each water use type

Sub-metering will be implemented where possible to assist in quantifying water use at individual locations across the mine site.

See Appendix 8

Sub-meter reading with monthly abstraction volumes

Monitoring bores/inactive production bores6

Fortnightly7 Groundwater level

Water levels monitored fortnightly at selected monitoring bores and inactive production bores to assist in hydrogeological understanding and numerical model calibration.

See Appendix 8

Pastoral bores

Monthly

Groundwater level Selected pastoral bores are monitored monthly to assist in hydrogeological understanding and ensure the water resource is maintained.

See Appendix 8 Field electrical conductivity

Contingency discharge monitoring

Varying times and frequencies

Field electrical conductivity As a DEC requirement in the event that reuse, injection, in pit disposal and temporary storage are not available or have been exhausted.

Refer to the Christmas Creek Pit Flood Response Plan. (Fortescue Metals Group, 2012b).

See Appendix 8

Nephelometric turbidity (NTU)

Flow meter readings

Groundwater levels are measured using a field groundwater probe. Salinity is measured using a

field electrical conductivity (EC) measurement probe that is lowered to a designated depth

within the screen interval. In some cases, automatic bore loggers are also deployed.

6Sampling and monitoring of monitoring bores and inactive production bores does not form a regulatory requirement but provides essential information to operate and optimise the dewatering system. The location of these key bores will change with expansion and development of pits and active areas of dewatering. 7 Frequency of monitoring will be determined by water level response and importance of pit region.


CC-PH-HY-0003_Rev0.

7. ENVIRONMENTAL IMPACT MANAGEMENT

The Christmas Creek Water Management Scheme is operated to prevent or minimise any

potential environmental impacts. Environmental values that may be affected by groundwater

abstraction activities are detailed in the following sections.

7.1 Potential environmental impacts

Fortescue has submitted an application to the Environmental Protection Authority (EPA) for the

Christmas Creek Water Management Scheme Environmental Review (FMG, 2011). The

document described the potential environmental impacts associated with the scheme and the

management measures to be implemented to mitigate these impacts.

The primary environmental issues likely to result from construction and operation of the

infrastructure comprise of vegetation clearing, dust and changes to hydrology. Other potential

impacts include vegetation impacts due to drawdown and mounding, and surface water flow

disturbance. A summary of the management and mitigation strategies which are to be applied

are described in Section 10.

7.1.1 Overall environmental management approach

The groundwater management infrastructure is located within Fortescue’s Chichester Range

operations area and will be managed in accordance with environmental management plans for

this area. Plans of particular relevance include the following8:

Chichester Operations Surface Water Management Plan (45-PL-EN-0015)

Chichester Operations Groundwater and Bore Management Plan (45-PL-EN-0005)

Groundwater Discharge Management Plan (45-PL-EN-0019)

Significant Flora and Vegetation Management Plan (45-PL-EN-0017)

Fortescue Marshes Management Plan (45-PL-EN-0009);

Weed Management Plan (45-PL-EN-0013);

Chichester Operations Fauna Management Plan (45-PL-EN-0007);

Chemical and Hydrocarbon Management Plan (45-PL-EN-0011);

Mine and Rail Dust Management Plan (45-PL-EN-0030);

Bushfire Management Plan (45-PL-EM-0001).

These and other management plans for the Christmas Creek area are available at

www.fmgl.com.au.

8 Environmental management plans are constantly being reviewed and updated. The management of operations will be based on the latest iteration of each document.


CC-PH-HY-0003_Rev0.

8. TRIGGER LEVELS AND CONTINGENCY PLANS

Fortescue has developed a system for assigning and managing an appropriate distribution of

monitoring points and associated trigger levels for groundwater levels and groundwater quality

(salinity). The system takes into consideration the spatial extent of the project, operational

activities, sensitive environmental receptors and beneficial water use. The distribution of trigger

monitoring bores is presented in Figure 7 and listed in Appendix 9. This section describes the

trigger level system and the responses that are initiated when trigger levels are exceeded.

8.1 Project zoning

Due to the significant spatial extent of the project, a system of zoning has been developed,

which takes in to consideration the hydrogeological complexity and different functional areas of

the project.

There are four zones (Figure 7):

Zone A: near-marsh region;

Zone B: saline injection region;

Zone C: brackish injection region; and

Zone D: phreatophytic vegetation region.

Zone A extends from the northern fringe of Fortescue Marsh up to the 410 mAHD topographic

elevation contour (three metres beyond the maximum marsh flooding level of 407 mAHD). Zone

B includes the saline injection area and the saline injection region of influence. Zone C includes

the brackish injection area and the brackish region of influence. Zone D includes selected

locations where suitable habitat for phreatophytic vegetation has been identified.

The following sections describe the application of a two-tiered trigger level system within the

four zones, a framework for assigning appropriate trigger levels, calculation of trigger level

values and response plans.

8.2 Two‐tiered trigger level system

A two-tiered trigger level system has been developed:

Class 1 trigger levels serve as an early warning for groundwater level and quality changes from a calculated baseline value. Refer to Appendix 10 for details of the internal trigger reporting process.

Class 2 trigger levels are aligned with groundwater level changes that may potentially impact upon the environment and future beneficial use of the aquifer.


CC-PH-HY-0003_Rev0.

Appropriate triggers are assigned to both the shallow aquifer (alluvium and Tertiary Detritals)

and to the deeper aquifers (Marra Mamba, Oakover and Wittenoom Formations).

8.3 Framework for selecting appropriate trigger values

The framework builds on the project zoning and the two-tier trigger value system which provides

a means for determining if Class 1 or Class 2 trigger levels are appropriate at each monitoring

point. This framework is presented in Table 10.

8.3.1 Groundwater level and EC triggers

The basis for assigning Class 2 trigger level values in each project zone takes into

consideration baseline conditions, estimates of uncertainty and impact assessments. Table 10

summarises the basis for each of the Class 2 trigger values assigned.

Class 1 groundwater level triggers are an early warning indication of change such that a Class 2

breach will be avoided.

The ‘baseline’ value from which EC triggers are assessed are based on data that is first ‘pre-

conditioned’ (checked for veracity), then assessed statistically (average, maximum, minimum,

etcetera). A baseline level is set based on the maximum value over the ‘pre-conditioned’ data

range. Groundwater quality trigger levels are established only for bores with a statistically valid

number of measurements.

8.3.2 Near‐marsh water level assessment

A monthly hydrogeological assessment of near-marsh monitoring bores is undertaken for both

Christmas Creek and Cloudbreak. This assessment includes a comparison of observed water

level against baseline data as well as individual bore trends against regional, non-abstraction-

and non-injection related groundwater trends. A number of techniques are adopted to complete

this assessment; one of these techniques is described below. Other assessment

methodologies may also be employed where appropriate and these procedures are reviewed

regularly.

Seasonal trend

Fortescue generates seasonal trends of all data in the near marsh zone to ensure individual

locations are not showing trends outside of the regional response. This process is described in

Table 9.

Christma

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Table 10: Trigger level framework

Zone Region Aquifer Groundwater level trigger

Water quality trigger Trigger Basis

Class 1 Class 2 Class 1

A Near-marsh Tertiary Detrital

Absolute change of ±0.65 m from

baseline having regard for season

variation

Change of ±1 m (±1.5 m for CCFMM01_S) from baseline having

regard for season variation

N/A9

Class 1 groundwater level trigger to provide early warning and to signal potential future Class 2 conditions

Class 2 groundwater level trigger as stipulated in Condition 7 of MS871 (Fortescue Marsh)

‘the proponent shall manage the injection of surplus water to ensure that groundwater levels do not rise more than 1.5 metres at MB1 and 1 metre at MB2, MB3 and MB4 from the baseline groundwater level.’

B Saline

injection

Tertiary Detrital

3 m below ground level

2.2 m below ground level

9,000 µS/cm (unless the baseline10 is higher than 6,000 µS/cm, then

50% increase from baseline)11


Class 2 groundwater level trigger as stipulated in Condition 8-1 of MS871 (groundwater mounding)

‘the proponent shall manage the injection of surplus water to ensure that mounding of the groundwater level within the impact zones but outside the exclusion area’.

Oakover Formation


N/A N/A

C Brackish injection

Tertiary Detrital



9,000 µS/cm (unless the baseline19 is higher than 6,000 µS/cm, then

50% increase from baseline)20


Class 2 groundwater level trigger as stipulated in Condition 6 of MS871 (groundwater mounding). See above.

Class 1 EC trigger assigned to ensure baseline aquifer water Marra Mamba

Formation 3 m below ground

level N/A

9 Baseline EC at the near Marsh monitoring locations is above 9,000 and hence no trigger to be applied. 10 Baseline EC based on pre-injection and/or pre-dewatering-impact time series data. 11 If baseline groundwater quality is greater than 9,000 µS/cm no trigger is applied.


CC-PH-HY-0003_Rev0.

Zone Region Aquifer Groundwater level trigger

Water quality trigger Trigger Basis

Class 1 Class 2 Class 1

Bulk flow N/A N/A 9,000 µS/cm

quality is maintained as required by DEC (L8454/2010/1).

D Phreatophytic vegetation12

Tertiary Detrital



50% increase from baseline19


Class 2 groundwater level defined to prevent environmental impact at areas where phreatophytic vegetation may be susceptible to drawdown.

Groundwater level where phreatophytic vegetation may be susceptible to drawdown of the groundwater level of more than 20 m from the ground surface. Ecoscape’s impact assessment for dewatering (Ecoscape, 2009). A 10% precautionary factor has been applied.

Class 1 E.C. trigger assigned to ensure baseline aquifer water quality is maintained as required by DEC (L8454/2010/1).

Marra Mamba Formation



50% increase from baseline19

Misc.

Roy Hill/Fortescue

tenement boundary

Tertiary Detrital

Change of ±1.25 m from seasonally varying water

levels

Change of ±1.5 m from seasonally

varying water levels

N/A


Class 2 groundwater level trigger as stipulated in Condition 10 of MS871 (Reinjection impacts to other mines)

‘The proponent shall manage the reinjection of surplus water to ensure that it does not cause a significant increase in dewatering requirements at other non-proponent approved mining operations.’

Marra Mamba

Formation

Change of ±1.25 m from

seasonally varying water

levels

Change of ±1.5 m from seasonally

varying water levels

12 Other assessment techniques such as projected canopy cover and remote sensing technology are being developed to help assess the impact to phreatophytic vegetation zones and compliment this groundwater monitoring data.


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8.4 Trigger Level Response

Due to the large volume of data being captured, Fortescue’s groundwater database (Envirosys)

has an automated tracking system to identify trigger level exceedances. Trigger level

exceedances will be reported quarterly to the DoW as part of the quarterly aquifer review

outlined in Table 4. The assigned trigger levels are presented in Appendix 9 and the locations of

the trigger monitoring bores are shown Figure 7.

Where a trigger level is exceeded, parameter(s) are re-measured to confirm the exceedance.

Where the reading is confirmed, Fortescue will implement the following where a:

Class 1 trigger level is exceeded;

initiate a hydrogeological assessment with the objective of determining the reason(s) for the divergence and if necessary increase monitoring frequency or extent;

if necessary, implement changes to the water management system; and

explore improvements in the trigger levels based on new data;

Class 2 trigger level is exceeded;

initiate a hydrogeological assessment with the objective of determining the reason(s) for the trigger level breach;

modify operational activities to ensure that the groundwater level and or salinity changes do not continue to breach the trigger value. This may include;

o reduce volumes of water piped to the affected area by redirecting water to other injection areas;

o redirect water from the appropriate transfer pond and other injection areas where drawdown exceeds the trigger in the phreatophytic zones (Zone D);

o redirect disposal to transfer and/or infiltration ponds;

o redirect disposal to void mine pits (where available); and

o implement the Captured Rainfall Emergency Discharge Procedure allowing the discharge of up to 20,000 kL/day (FMG, 2009).

For Class 2 triggers associated with the Zone A (near-marsh) monitoring bores (CCFMM01_S,

CCFMM02_S, CCFMM03_S, CCFMM04_S and CCFMM05_S), any exceedance will initiate a

thorough review of the vegetation health assessment and efforts will be made to maintain, or

improve, the divergent groundwater level. Should adverse vegetation health be detected, the

DEC will be informed.


CC-PH-HY-0003_Rev0.

The DoW will be notified within 72 hours and the matter will be reported in the annual

groundwater review. Appendix 10 further outlines Fortescue’s trigger reporting procedure and

protocol.

8.5 Contingency plans

Should unforseen demands and/or situations for the following events occur contingencies have

been developed to ensure that potential for impact to the environment is minimised.

8.5.1 Insufficient brackish water

If it is found that the brackish water supply from dewatering varies from the expected volume

and is insufficient to meet demand, the demand may be met by:

abstraction from current brackish injection borefields and/or existing exploratory bores;

movement of excess brackish water provided from/to Christmas Creek; and/or

approval may be sought for alternate sources such as external borefields.

8.5.2 Insufficient injection capacity

If it is found that either brackish or saline water injection capacity and/or licensed disposal

volume is insufficient for the volume abstracted, Fortescue’s contingency plans are as follows:

initiate a hydrogeological assessment with the objective of determining the reason(s) for the divergence;

movement of excess water between Cloudbreak and Christmas Creek13;

discuss with regulatory authorities potential to increase injection volume; and

if necessary, implement changes to operations to ensure volume of water for injection can be managed with existing injection infrastructure.

13 Primary approval is being sought to allow the transfer of saline water and injection at the adjacent site. The transfer and injection of brackish water is currently managed through the Hill Side East injection borefield.


CC-PH-HY-0003_Rev0.

9. EFFICIENT WATER USE INITIATIVES

A number of measures are utilised to reduce the demand on brackish water for dust

suppression at the mine site. These include:

the use of non-toxic, biodegradable dust suppression additives such as Rainstorm;

utilising lower-quality water for road dust suppression where possible;

the use of treated wastewater for dust suppression activities;

process water recycling (associated with crushing and screening);

ongoing investigations into further use of treated wastewater around the mine site; and

the use of low-flow taps, shower head and sprinkler systems.

The site water balance will be assessed by the Water Management Team on an annual basis

and together with the Mining Services Team. Any potential improvements to water efficiency will

be investigated and implemented where practical.


CC-PH-HY-0003_Rev0.

10. MANAGEMENT COMMITMENTS SUMMARY

Tables 11 and 12 highlight the environmental commitments that have been made by Fortescue

throughout the content of this document.

Table 11: Summary of licensee’s commitments

Section Subject Commitment Timing

2 Reporting

requirements

Fortescue will fulfil various reporting requirements to the

DoW on the operation of the System on a quarterly,

annual, triennial, and as required basis. See Section 4 for

details.

On a quarterly, annual,

triennial or as required

basis after System

commencement.

4.2

Compliance

with 5C

licence

Abstraction bores will be operated in accordance with the

terms and conditions of relevant 5C licences.

Abstraction levels during the relevant licence periods will

be within the respective prescribed annual water

entitlement.

Ongoing after

commencement.

5.2

Maintenance

of the

System

All water storage facilities and other water infrastructure

associated with the System are inspected weekly by

maintenance personnel checking for water leaks, controls

and condition of containment dams with problems rectified

as they arise.

Water meters on all bores are tested as per

manufacturer’s specifications to ensure accuracy.

Weekly or as per

manufacturer’s

instructions.

5

Operations

monitoring

program

Fortescue will fulfil various monitoring requirements on a

monthly or six monthly basis in respect of abstraction

bores, monitoring bores and water use volumes.

On a monthly or six

monthly basis after

commencement.

8 Groundwater

trigger levels

As part of groundwater monitoring, Fortescue will

implement a trigger system to initiate, where necessary,

changes to abstraction. See Section 8 for specific details.

Ongoing after

commencement.

8

Electrical

Conductivity

trigger levels

Trigger levels will be included for recently commissioned

bores within six months of commissioning.

Ongoing after

commencement.


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Table 12: Environmental Impact Management

Trigger Zone Environmental

Factor Operating Strategy Management

Objectives Existing Environment

Management Strategies / Proponent Commitments

Zo

ne

A –

Ne

ar

Ma

rsh

Groundwater

The proponent shall manage the injection of surplus water to ensure that groundwater levels do not rise more than 1.5 metres at MB1 and 1 metre at MB2, MB3 and MB4 from the baseline groundwater level having regard for seasonal variation.

There are two aquifers in the vicinity of the Fortescue Marsh, Shallow alluvium and the Wittenoom Dolomite at depth.


Class 2 groundwater level trigger as stipulated in Condition 7 of MS871 (Fortescue Marsh) to ensure protection of identified vegetation, flora, fauna and heritage areas.

Vegetation & Flora

Samphire and marsh communities, which are locally significant and are associated with the Fortescue Marsh PEC (P1).

Conservation and Natural Heritage

Areas

The Fortescue Marsh is listed on the Register of National Estate as an unusual type of wetland, its conservation significance to waterbirds and other cultural values, both indigenous and non-indigenous (DSEWPC 2010a).

In addition, the Fortescue Marsh has been identified as a ‘Nationally Important Wetland’ as it a good example of an extensive, inland floodplain system which is regularly inundated and is a unique wetland in Western Australia (DSEWPC 2010b).

Matters of National

Environmental Significance

Only one Migratory species of National Significance has been confirmed as being present in the Proposal area.

Zo

ne

B –

Sa

line

Inje

ctio

n

Groundwater

The proponent shall manage the injection of surplus water to ensure that groundwater level within the impacted zones but outside of the exclusion area does not result in groundwater levels rising within 2 meters of the surface.

The proponent shall manage groundwater abstraction and disposal (dewatering and injection) for the project in a manner that ensures:

1. There is no adverse impact on native vegetation communities attributable to the project outside

There are two aquifers in the vicinity of Zone B, shallow Alluvium and the Wittenoom Dolomite. The Nammuldi member of the Marra Mamba Iron formation is expected at depth but has not been intersected.



Class 1 EC trigger assigned to shallow aquifer to ensure baseline aquifer water quality is maintained.

Vegetation & Flora

Vegetation types mapped in Zone B are consider to be locally significant, including:

Mulga communities, which are potentially sheet flow

dependent;

Samphire and marsh communities, which are locally

significant and are associated with the Fortescue Marsh

PEC (P1).


CC-PH-HY-0003_Rev0.





Fauna

the predicted impact areas; and

2. Within the proposed impact area there is no mortality of keystone plant species or significant change sin habitat characteristics attributable to the project.

Two fauna habitat types – Mulga and Coolibah/River Red Gum communities have the potential to be affected by the Proposal. These habitat types are not restricted to the Proposal area and are generally widely represented throughout the region.

Zo

ne

C –

Bra

ckis

h In

ject

ion

Groundwater

See Zone B above.

There are two aquifers in the vicinity of Zone C shallow Alluvium and the Nammuldi member of the Marra Mamba Iron formation.



Class 1 EC trigger assigned to shallow aquifer to ensure baseline aquifer water quality is maintained.

Vegetation & Flora

Vegetation types mapped in Zone C are consider to be locally significant, including:


dependent;

Fauna


Zo

ne

D –

Ph

rea

toph

ytic

Ve

ge

tatio

n

Groundwater The proponent shall manage groundwater abstraction and disposal (dewatering and injection) for the project in a manner that ensures:

1. There is no adverse impact on native vegetation communities attributable to the project outside the predicted impact areas; and

2. Within the proposed impact area there is no mortality of keystone plant species or significant change sin habitat characteristics attributable to the project.

There are two aquifers in the vicinity of Zone D shallow Alluvium and the Nammuldi member of the Marra Mamba Iron formation.


Class 2 groundwater level defined to prevent environmental impact at areas where phreatophytic vegetation may be susceptible to drawdown.

Class 1 E.C. trigger assigned to ensure baseline aquifer water quality is maintained as required by DEC (L8454/2010/1).

Vegetation & Flora

Vegetation types mapped in Zone D area are consider to be locally significant, including:


dependent;

Potentially groundwater dependent species.

Fauna



CC-PH-HY-0003_Rev0.





Mis

c. –

Ro

yhill

B

ou

nda

ry

Groundwater

The proponent shall manage the reinjection of surplus water to ensure that it does not cause a significant increase in dewatering requirements at other non-proponent approved mining operations.

There are two aquifers in the vicinity of the boundary with Royhill, shallow Alluvium and the Nammuldi member of the Marra Mamba Iron formation.


Class 2 groundwater level trigger as stipulated in Condition 10 of MS871 (Reinjection impacts to other mines)


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11. REFERENCES

Department of Minerals and Energy, 1999, Guidelines on the safe design and operating

standards for tailings storage, Department of Minerals and Energy, Western Australia

Department of Water, 2009, Guidelines for water meter installation, Department of Water, Perth.

Department of Water, 2010, Operational policy 5.08 Use of operating strategies in the water

licensing process, DWPF 5.08, Department of Water, Perth.

Department of Water, 2011, Operational Policy 1.01 Managed aquifer recharge in Western

Australia. Department of Water, Perth

Ecoscape, 2009, Flora and vegetation impact assessment for dewatering at Fortescue

Cloudbreak mine (Revised), report prepared for Fortescue Metals Group Limited.

Fortescue Metals Group, 2010, Hydrogeological assessment for Christmas Creek water

management scheme, Document No. CC-RP-HY-004, Fortescue Metals Group, Perth.

Fortescue Metals Group, 2011, Christmas Creek Water Management Scheme Environmental

Review, CC-RP-EN-0011-Rev2, Fortescue Metals Group, Perth.

Fortescue Metals Group, 2012a, Cloudbreak Groundwater Operating Strategy, CB-PH-HY-

0009, Fortescue Metals Group, Perth.

Fortescue Metals Group, 2012b, Christmas Creek Pit flood Response Plan: Water

Management, Document No. CC-PL-WM-0001, Fortescue Metals Group, Perth.

Fortescue Metals Group, 2013, Christmas Creek Water Management Scheme, Part V Licence

L8454/2010/1 Supporting Document, CC-RP-EN-0052, 24 May 2013.


CC-PH-HY-0003_Rev0.

12. GLOSSARY

Acronym Description

mbgl Metres Below Ground Level

DEC Department of Environment and Conservation

DoW Department of Water

EC Electrical Conductivity

EPA Environmental Protection Authority

EP Act Environmental Protection Act 1986

Fortescue Fortescue Metals Group Limited

GL/a Gigalitres Per Annum

GDP Ground Disturbance Permit

GWL Groundwater Licence

ha Hectare

HDPE Heavy Density Polyethylene

kL Kilolitre

km Kilometres

L/s Litres Per Second

m Metres

mm Millimetres

MMF Marra Mamba Formation

mg/L Milligrams per Litre

ND Nominal diameter (measured in Millimetres)

μS/cm Microsiemens per Centimetre

Operating Strategy Christmas Groundwater Operating Strategy

OPF Ore Processing Facility

PN Pressure Nomination (measured in Bar at 20oC)

PVC Polyvinyl Chloride

The Project Pilbara Iron Ore and Infrastructure Project

RO Reverse Osmosis

RIWI Act Rights in Water and Irrigation Act 1914

SP Settlement Pond

The System Cloudbreak Dewatering and Injection

TDS Total Dissolved Solids

TN Turkey Nest

TP Transfer Pond


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Figure 1: Regional location plan


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0.5

°

-23.5 °

-21.5 °

Fortescue Marshes

Christmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekFortescue Marshes

DE

GR

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ER

ST

RE

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Y R

IVE

R E

AS

T

RIDLE

Y RIV

ER

TU

RN

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CO

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GA

N R

IVE

R

PEAR CREEK

SHAW

RIVE

R

TURNER RIVER EAST

WA

RR

ALO

NG

CR

EEK

MCPH

EE CR

EEK

TALG

A R

IVE

R

MI R

ALG

A C

RE

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CAMEL CREEK

YANDICO

OG

INA C

REEK

YULE RIVER

SANDY CREEKYILGALONG C

REEK

SH

ER

LOC

K R

IVE

R

PIL

BA

DD

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WE

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ER

WALL

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D

NULLAGINE RIVER

FO

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IVE

R (

SO

UT

HE

RN

BR

AN

CH

)

ST

OC

K R

OU

TE C

RE

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BE

LLAR

Y C

RE

EK

TUREE CREEK

WEELI WOLLI CREEK

TUREE CREEK EAST BRANCHFORTESCUE RIVER

WESTERN C

REEKSPEARHOLE CREEK

KIRENIA CREEK

WA

RR

AW

AN

DA

CR

EE

K

OAKOVER RIVER

ANGELO RIVER

TA

BB

A T

AB

BA

CR

EE

K

PE

AW

AH

RIV

ER

TUR

NER

RIV

ER

EA

ST BR

ANC

H

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NEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMANNEWMAN

PARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOOPARABURDOO

PORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLANDPORT HEDLAND

TOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICETOM PRICE

NULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINENULLAGINE

MOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHYMOUNT GOLDSWORTHY

AUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEAUSKI ROADHOUSEChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas CreekChristmas Creek

BHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP YandiBHP Yandi

HI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI YandicooginaHI Yandicoogina

Mining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area CMining Area C

West AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest AngelasWest Angelas

MarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandooMarandoo

YarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrieYarrie

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ChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannarChannar

JimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebarJimblebar

LocationMap

Kalgoorlie

PERTH

ProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProjectProject"Port Hedland

Fortescue Metals Group LtdFortescue Metals Group Ltd

Confidentiality: 1

Scale: 1:1750000

Revision: 6

Date: 24/02/2011

Regional Project Location

Author: MYC

Projection: Longitude / Latitude (WGS 84)

Drawn By: HW

Doc No: CC_MP_HY_0061

0 25

kilometres

50

Mine SitesFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF

Towns.................................................

FMG Railway

Roads

Major Creek/Drainage

Other Railways

[This page has been left blank intentionally]


CC-PH-HY-0003_Rev0.

Figure 2: Existing Christmas Creek water management infrastructure


CC-PH-HY-0003_Rev0.


")

")

")

")

")

")

")

")

")

")

")

")

")

")

")

#*

#*#*#* #*#*

#*#*#*#* #*#*#*#*#* #*

#*#*#* #*#*#*

#*#*#*

#*

#

#

###

### # #

##

#

#

##

#

# #

#

##

#

##

#

#

####

#

Roy

Hill

ten

emen

t bou

ndar

y

Spinifex Pigeon injection borefield

Fortescue Marsh

Hillside East brackish

injection borefield

Future Connection to Cloudbreak

760,000

760,000

770,000

770,000

780,000

780,000

790,000

790,000

800,000

800,000

7,5

00,0

00

7,5

00,0

00

7,5

10,0

00

7,5

10,0

00

7,5

20,0

00

7,5

20,0

00

7,5

30,0

00

7,5

30,0

00

0 1,750 3,500 5,250 7,000

metres

±LEGEND#* Existing brackish injection bores

# Existing saline injection bores

Active Production Bore

Existing brackish settlement pond

Existing saline settlement pond

Existing brackish transfer pond

Existing saline transfer pond

") Existing turkeys nests

Existing brackish conveyance corridor

Existing saline conveyance corridor

Abstraction region

CC2 mine plan

CC1 mine plan

Roy Hill tenement boundary

Fortescue Marsh

Life of mine resource outline

M Short

Water Management

Christmas CreekExisting water infrastructure

0

Projection: GDA 1994 MGA Zone 50

Date: 13/06/2013

Doc Name: Figure 2 - Exisiting Infrastructure

Size: A3L

Scale:1:120,000

Drawn By:

Requested By:

Confidentiality: 1

Revision:


CC-PH-HY-0003_Rev0.

Figure 3: Hydrogeological section


CC-PH-HY-0003_Rev0.


NNE SSW

Horizontal distance (m)

Ver

tical

sca

le (

m)

Ore ZoneHardcap

Alluvium/Colluvium

Oakover Formation

Wittenoom Formation

Jeerinah Formation

Marra Mamba Formation

clay

Episodic rainfall recharge

in catchment

0 2000 4000 6000 8000

Episodic catchment rainfall & flood events

Evapotranspiration

0.5 GL/yr

260 GL/yr260 GL/yr

Project-scale flux estimate260 GL/yrBrackish groundwater

Saliine groundwater

Fortescue Marsh

Groundwater table

0

50

100

Christmas Creek conceptual hydrogeology

Evaporative concentration and salinisationof groundwater due to the upper Fortescue Marsh catchments' internal drainage

0.08 GL/yr

1

1

2

Footnotes:1 Annual groundwater discharge to the marsh and recharge from marsh flooding (average rates along the marsh edge, south of the Christmas Creek pits [about 36km strike length], calculated from a calibration numerical model with a simulation period from January 2007 to June 2011)2 Based on Worley Parsons (2012): Christmas Creek Life of Mine Expansion - Fortescue Marsh Catchment Water Balance Study. Average inflow based on a water balance from 1984 to 2011. Other time periods will yield different average inflows.

[This page has been left black intentionally]


CC-PH-HY-0003_Rev0.

Figure 4: Regional production bores


CC-PH-HY-0003_Rev0.


SPI01 to SPI06

HEI01 to HEI05

CCP24

CCP23CCP17

CCP16CCP10

CCP09

CCP08

CCP07

CCE18

CCE16CCE14

CCE12

CCE10

CCE05

CCE04

CCE02

CCE01

CCP22CCE13

WS20P3WS19P3

WS19P2

CCE02T

WS21P3

WS21P1

WS20P1&2

CCE41T

CCE19T

CCCP02CCCP01

CCP08-d

Wild Bore

Thor Bore

Meagan Bore

6 Mile Bore

Francos Bore

10 Mile Bore

Charlton Bore

Warri Outcamp Well

CCCAP03&4

760,000

760,000

770,000

770,000

780,000

780,000

790,000

790,000

800,000

800,000

7,5

00,0

00

7,5

00,0

00

7,5

10,0

00

7,5

10,0

00

7,5

20,0

00

7,5

20,0

00

0 1,700 3,400 5,100 6,800

metres

±LEGEND

Production bore

Water conveyance infrastructure


Fortescue Marsh


M Short

Water Management

Christmas CreekChristmas Creek Production Bores

0


Date: 14/06/2013

Doc Name: Figure 4 - Production Bore Non Pit Region

Size: A3L

Scale:1:120,000

Drawn By:

Requested By:

Confidentiality: 1

Revision:


CC-PH-HY-0003_Rev0.

Figure 5: Injection locations


CC-PH-HY-0003_Rev0.


#*#*

#*#*

#*#* #*#*#*#*

#*

#*

#*

#* #*#*

#*#*

#*

#* #*#*

#*#*

#* #*

#* #* #* #*

#*

#*

#*

#*#*

#* #*

#*

#*

#*#*#*

#*#*#* #* #*

#*#*

#*

#*

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#*

#*

#*#*

#*

#*

#*

#*

#*#*

#*

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#*#*#*#*

#*

#*

#*#*#*#*#*

#*#*

#*#*#*

#*#*

#*

#*#*

Fortescue Marsh

HEI04 E:773378 N:7523169.6

HSB62 E:770969 N:7523234.6

HSB60 E:769616.4 N:7523186

HSB53 E:766796.5 N:7523481

HSB49 E:765209.8 N:7523799

HSB48 E:764809.2 N:7523563

HEMB05_S E:774490 N:7523249

HEI05 E:774510.7 N:7523245.6

HEI03 E:773046.7 N:7523357.6

HSB59 E:769203.6 N:7523572.7

HSB58 E:768801.8 N:7523483.2

HSB56 E:768001.5 N:7523261.7

HSB52 E:766403.5 N:7523613.2

HSB45 E:763582.8 N:7524086.2

HSB43 E:762818.3 N:7523979.3

SPM04 E:791981 N:7518776

SPI02 E:792475.8 N:7518417

CCSP0008 E:792132 N:7517759

SPI04 E:791989.8 N:7518758.5

SAI05

SAI04

SAI03

SAI02

SAI01

SAI22

SAI21

SAI23

SAI08

SAI09

SAI10

SAI07

SAI06

SAI11

SAI12

SAI13SAI14SAi15

SAI17SAI16

SAI18SAI20

SAI19

SAI20b

SAI16aSAI15a

SAI14aSAI13a SAI12a

SAI12b

SAI01A

SAI04A

760,000

760,000

770,000

770,000

780,000

780,000

790,000

790,000

7,5

10,0

00

7,5

10,0

00

7,5

20,0

00

7,5

20,0

00

0 1,200 2,400 3,600 4,800

metres

±LEGEND#* Saline injection bore

#* Brackish injection bore

Existing brackish conveyance corridor

Existing saline conveyance corridor


Fortescue Marsh

M Short

Water Management

Christmas CreekInjection Bores

0


Date: 28/06/2013

Doc Name: Figure 5 - Injection Locations

Size: A3L

Scale: 1:85,000

Drawn By:

Requested By:

Confidentiality: 1

Revision:


CC-PH-HY-0003_Rev0.

Figure 6: Monitoring location plan


CC-PH-HY-0003_Rev0.


!(

!(

!(

!(

!(

!(

!(

!(

!(

!(!(

!(

!(

!(!(

!(!(!(!(!(!(!(!(

!(!(!(

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!(

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!(

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!( !(!(

!(!(

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!(

!(

!(

!(

!( !(

!(

!(

!(

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!(

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!(

!(

!(

!(

!(!(

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!(!(

!(!(

!(

!(

!(

!(!(

!(!(!(

!(!(

!(

!(

!(

!(

!(

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!(

!(

!(

!(!(!(!(

!(

!(

!(

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!(

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!(

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!(!(

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!(

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!(

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!(

!(

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!(

!(

!(

!(

!(

!(

!(

!(

760,000

760,000

765,000

765,000

770,000

770,000

775,000

775,000

780,000

780,000

785,000

785,000

790,000

790,000

795,000

795,000

800,000

800,000

7,5

00,0

00

7,5

00,0

00

7,5

05,0

00

7,5

05,0

00

7,5

10,0

00

7,5

10,0

00

7,5

15,0

00

7,5

15,0

00

7,5

20,0

00

7,5

20,0

00

7,5

25,0

00

7,5

25,0

00

0 1,700 3,400 5,100 6,800

metres

±LEGEND!( Contingency discharge (flow meter)

!( Pastoral bore (bore)

!( Reinjection sample point (flow meter)

!( Chemical analysis (bore)

!( Model calibration (bore)

!( Bulk flow (flow meter)

!( Trigger network


Fortescue Marsh

Life of mine resource outline M Short

Water Management

Christmas CreekMonitoring Locations

0


Date: 13/06/2013

Doc Name: Figure 6 Monitoring locations

Size: A3L

Scale:1:115,000

Drawn By:

Requested By:

Confidentiality: 1

Revision:


CC-PH-HY-0003_Rev0.

Figure 7: Christmas Creek trigger level zones and bores


CC-PH-HY-0003_Rev0.


#*

#*

#*

#*

SPM10

SPM09SPM08

SPM07

SPM06

SPM01

SAM01

SAM03

SAM05

SAM06

SAM12

SAM16

SAM17

SAM19

SAM21

SAM22

SAM23

SAM24

SAM25

SAM26

SAM27SAM28

SAM29

SAM30

SAM32

SAM33

SAM34

SAM35

SAM48

SCX01

SCX06

SPM05

HEMB01

HEMB02

HEMB04HEMB05

HSMB24

HSMB25

HSMB26

HSMB27

HSMB28

HSMB29

CCFMM01

CCFMM02

CCFMM03

CCFMM04

CCFMM05

SCX05_S

SCX03_D

CCF07B_S

CCF03B_S

CCE10MB_I

CCE02MB_I

CCSP0001

CCSP008

CCSP0011

SAM38

SAM39

SAM40SAM41

SAM42

SAM44

SAM45

SAM46

SAM47

SAM49

SPM03CCSP0015

760,000

760,000

765,000

765,000

770,000

770,000

775,000

775,000

780,000

780,000

785,000

785,000

790,000

790,000

795,000

795,000

800,000

800,000

7,5

00,0

00

7,5

00,0

00

7,5

05,0

00

7,5

05,0

00

7,5

10,0

00

7,5

10,0

00

7,5

15,0

00

7,5

15,0

00

7,5

20,0

00

7,5

20,0

00

7,5

25,0

00

7,5

25,0

00

0 1,700 3,400 5,100 6,800

metres

±LEGEND

Zone A

Zone B

Zone C

Zone D

Misc

#* Sample Point

Mine plan

Fortescue Marsh

Zone_A_polygon

Saline_polygon

Brackish_polygon

Phreatophytic vegetation region

Roy Hill tenement boundaryM Short

Water Management

Christmas CreekProject Trigger Zones

0


Date: 13/06/2013

Doc Name: Triggers June 2013

Size: A3L

Scale:1:115,000

Drawn By:

Requested By:

Confidentiality: 1

Revision:


CC-PH-HY-0003_Rev0.

Appendix 1: Groundwater abstraction licence


CC-PH-HY-0003_Rev0.


Government of Western Australia Department of Water

Sean McGunnigle

~~~~TIW~~ ~

BY:--------------------

Project: C..C Sub-Project/Facility:

-.--~~

Our ref7ookifW=~S'I'CCJ'11 our water needs

WRD158510

Enquiries: Kevin Hopkinson Telephone: (08) 9144 0214

Fortescue Metals Group Limited Level2 87 Adelaide Terrace EAST PERTH WA 6004

Doc Type: POW @ s17 s26d s45c !.38 [)e (Wks App) DeC (lie) DeC (Re a)

Application: YES Approval : CC -eN- OOs:t,- y S othe :.lfM~ed erwt- t G. 1 ~<93(6) tt-f ur~s

Dear Mr. McGunnigle,

Re: Fortescue Metals Group Limited (FMG) Licence: GWL 167593(5) Expiry: 11th July, 2013 Property: Christmas Creek

I refer to your application for a 5C Licence to amend (GWL 167593-04) the taking of Water which was received by the Department of Water on the 29th March, 2012 requesting to increase the licensed allocation to 48GL from the East Pilbara Hamersley Fractured Rock Aquifer for dewatering, dust suppression, processing, and camp purpose as part of the Christmas Creek Operations.

It was noted during assessment that there are registered sites of Aboriginal Heritage Significance in close proximity to the designated exploration areas. Please be advised that it is Fortescue Metals Group Limited's responsibility to ensure appropriate consultation with any affected Traditional Owners and adequate referral to the Department of Indigenous Affairs (DIA) is made, to ensure full compliance with the Aboriginal Heritage Act 1972.

There is Priority 1 flora and endangered Fauna located within the project area. Additionally, the project area is within an Environmentally Sensitive Area. If you have any queries, please contact the Department of Environment and Conservation on (08) 9182 2000 for further information

Please find enclosed your Licence to Take Water, issued under section 5C of the Rights in Water and Irrigation Act 1914. This licence entitles you to take water, subject to certain terms, conditions or restrictions. It does not absolve the licensee from responsibility for compliance with the requirements of all Commonwealth and State legislation.

It is important that you read the conditions of your licence carefully. If you do not understand your licence, please contact the Department as soon as possible, as there are penalties for failing to comply with all of your licence conditions . Under Section 26GG(2) of the Rights in Water and Irrigation Act 1914, you have a right to apply to the State Administrative Tribunal for a review of the decision to issue a Licence to Take Water. You have 28 days from the date you received this letter to request that the decision be reviewed .

For further information please contact the State Administrative Tribunal:

State Administrative Tribunal 12 St Georges Terrace PERTH WA 6000

Pilbara Region Lot 4608 Cherratta Road KIE

Karratha Western Australia 6714

PO Box 836 Karratha Western Australia 6714

Telephone (08) 9144 0200 Facsimile (08) 9144 2610

www.water.wa.gov.au

wa.gov.au ! !il

GPO Box U1991 PERTH WA 6845

Telephone: (08) 9219 3111 Toll-free: 1300 306 017 Facsimile: (08) 9202 1180 www.sat.justice.wa.gov.au

Under section 21 of the State Administrative Tribunal Act 2004, you have a right to request a written statement of reasons for the decision to issue a Licence to Take Water. This request must be made, in writing, to the Department of Water within 28 days after the day on which you received this letter.

If you wish to continue taking water after this Licence to Take Water expires, it is your responsibility to apply to the Department of Water for its renewal. If this licence expires and you have not applied to renew it, then the taking of water must cease, or you will be in breach of the Rights in Water and Irrigation Act 1914. It is suggested that an application for renewal be made at least one month in advance of the Licence to Take Water expiry date.

You may apply to amend or transfer the Licence to Take Water at any time. The Department may also amend, suspend or cancel this licence in certain circumstances.

An extract of this licence has been placed in the public register and is available for viewing by appointment at Department of Water offices.

If you have any queries relating to the above matter, please contact Kevin Hopkinson on telephone number (08) 9144 0214.

Yours faithfully

~/~: Dr. Hamid Mohsenzadeh Regional Manager Department of Water Pilbara Region

13 July 2012

File No: RF167-07 Government of Western Australia Department of Water

LICENCE TO TAKE WATER

Page 1 of2

Instrument No. GWL167593(5)

Granted by the Minister under section 5C of the Rights in Water and Irrigation Act 1914

Licensee(s)

Description ofWater Resource

Location of Water Source

Authorised Activities

Duration of Licence

Fortescue Metals Group Ltd

Pilbara Hamersley - Fractured Rock

Annual Water 48000000 kL Entitlement

E46/611, E46/612, M46/320, M46/321, M46/322, M46/328, M46/329, M46/333, M46/334, M46/336, M46/340, M46/341, M46/349, M46/350, M46/414, M46/415, M46/420

Taking of water for

Dewatering for mining purposes

Dust suppression for earthworks and construction putposes

Earthwork and construction putposes

General campsite putposes

Mineral ore processing and other mining putposes

Railway construction and maintenance

From 12 July 2012 to 11 July 2013

Location of Activity

M46/320, M46/321, M46/322, M46/323, M46/324, M46/325, M46/326, M46/327, M46/328, M46/329, M46/330, M46/331, M46/332, M46/333, M46/334, M46/335, M46/336, M46/337, M46/338, M46/340, M46/341, M46/342, M46/343, M46/344, M46/402, M46/403, M46/405, M46/406, M46/407, M46/408, M46/409, M46/412, M46/413, M46/414, M46/415, M46/416, M46/417, M46/418, M46/419, M46/420, M46/421, M46/423, M46/424

This Licence is subject to the following terms, conditions and restrictions:

1 Approval by the Department of Water is to be obtained prior to the construction of additional and replacement wells and the modification or refurbishment of existing wells.

2 That should the licensee's draw adversely affect the aquifer or other users in the area, the Department of Water may reduce the amount that may be drawn.

3 That should the drawing of water from the bore adversely affect the aquifer, and/or other users, the Department of Water shall direct the licensee to effect necessary action to make good the supply to affected users.

4 That should the licensee's draw adversely affect other authorised users or environmental values, the licensee shall be required to make good the supply or value to the satisfaction of the Department ofWater.

5 The licensee shall submit to the Department of Water an annual report by 30th September each year and a triennial report by 30th September 2012 containing the information as required by Operational policy 5.12 'Hydrogeological Reporting associated with a groundwater well licence'.

6 Quarterly technical reports are to be submitted to the Department of Water for assessment by 31st March, 30th June, 30th September (combined into AAR/T AR) and 31st December each year.

This Licence is granted subject to the Rights in Water and Irrigation Regulations 2000

File No: RF167-07 Government of Western Australia Department of Water

LICENCE TO TAKE WATER

Page 2 of2

Instrument No. GWL167593(5)

Granted by the Minister under section 5C of the Rights in Water and Irrigation Act 1914

This Licence is subject to the following terms, conditions and restrictions:

7 The licensee must install a cumulative water meter of a type approved under the Rights in Water and Irrigation (Approved Meters) Order 2009 to each water draw point under this licence.

8 The meter(s) must be installed in accordance with the provisions of the document entitled "Guidelines for Water Meter Installation 2009" before any water is taken under this licence.

9 The annual water year for water taken under this licence is defined as 12:00 pm at 31 July to 12:00 pm at 31 July twelve months later.

10 The licensee shall comply with the 'Christmas Creek Groundwater Operating Strategy (Rev 5- dated 14th May 2012)' as prepared by Fortescue Metals Group Limited and approved by the Department of Water on 30 May 2012, including any modifications to the 'Christmas Creek Groundwater Operating Strategy (Rev 5- dated 14th May 2012)' as approved during the term of the licence.

11 Should the monitoring at any time indicate a need for prompt action to prevent or reduce the effect of the licensee's draw on the underground resource, the licensee shall immediately report this to the Department of Water and advise the corrective measures proposed.

End of terms, conditions and restrictions

This Licence is granted subject to the Rights in Water and Irrigation Regulations 2000


CC-PH-HY-0003_Rev0.

Appendix 2: Tenements


CC-PH-HY-0003_Rev0.



CC-PH-HY-0003_Rev0.

Tenements – Abstraction Tenements – Water use Tenements – Injection

L46/99

M46/320

M46/321

M46/322

M46/323

M46/324

M46/325

M46/326

M46/327

M46/328

M46/329

M46/330

M46/331

M46/332

M46/333

M46/334

M46/335

M46/336

M46/337

M46/338

M46/339

M46/340

M46/341

M46/342

M46/343

M46/344

M46/345

M46/346

M46/347

M46/348

M46/349

M46/350

M46/351

M46/352

M46/402

M46/403

M46/405

M46/406

M46/412

M46/413

M46/414

M46/415

M46/416

M46/417

M46/418

M46/419

M46/420

M46/421

M46/422

M46/423

M46/424

L46/99

M46/320

M46/321

M46/322

M46/323

M46/324

M46/325

M46/326

M46/327

M46/328

M46/329

M46/330

M46/331

M46/332

M46/333

M46/334

M46/335

M46/336

M46/337

M46/338

M46/339

M46/340

M46/341

M46/342

M46/343

M46/344

M46/345

M46/346

M46/347

M46/348

M46/349

M46/350

M46/351

M46/352

M46/402

M46/403

M46/405

M46/406

M46/412

M46/413

M46/414

M46/415

M46/416

M46/417

M46/418

M46/419

M46/420

M46/421

M46/422

M46/423

M46/424

L46/99

M46/320

M46/321

M46/344

M46/345

M46/349

M46/350

M46/402

M46/403

M46/406

M46/412

M46/413

M46/414

M46/415

M46/416

M46/417

M46/423

M46/424


CC-PH-HY-0003_Rev0.



CC-PH-HY-0003_Rev0.

Appendix 3: No pit-region abstraction bore details


CC-PH-HY-0003_Rev0.



CC-PH-HY-0003_Rev0.

Bore Name Date Drilled GDA94, Zone 50 Tenement Casing Diameter (ND, mm)

Total Bore

Depth (m)

Maximum Pumping Rate

Easting Northing kL/day L/s

CCCP01 30-Aug-08 776,025 7,523,984 M46/320 200 mm PVC PN12 42 2000 23.1

CCCP02 01-Sep-08 776,803 7,524,202 M46/320 200 mm PVC PN12 47.4 2000 23.1

CCE01 08-Aug-09 772,734 7,522,410 M46/415 200 mm PVC PN12 78 1728 20

CCE02 09-Aug-09 772,659 7,519,894 E46/612 200 mm PVC PN12 78 2160 25

CCE02T 22-Mar-05 782,204 7,520,769 M46/328 155 mm PVC PN12 82 346 4

CCE04 19-Jul-09 777,617 7,521,608 M46/322 200 mm PVC PN12 70 432 5

CCE05 27-Aug-09 779,207 7,522,202 M46/322 200 mm PVC PN12 78 1037 12

CCE10 24-Aug-09 781,134 7,515,812 E46/612 200 mm PVC PN12 85 2592 30

CCE12 26-Aug-09 784,800 7,519,819 E46/334 200 mm PVC PN12 90 2592 30

CCE13 15-Aug-09 787,424 7,519,229 M46/336 200 mm PVC PN12 80 864 10

CCE14 19-Aug-09 789,204 7,517,564 M46/341 200 mm PVC PN12 126 1728 20

CCE16 05-Sep-09 794,336 7,517,807 M46/350 200 mm PVC PN12 57 1296 15

CCE18 02-Sep-09 792,278 7,510,766 E46/611 200 mm PVC PN12 80 2592 30

CCE19T 29-Mar-05 787,410 7,518,529 M46/336 155 mm PVC PN12 66 432 5.0

CCE41T 24-Mar-05 794,037 7,519,273 M46/349 155 mm PVC PN12 70 605 7.0

CCP07 26-Aug-08 782,380 7,522,812 M46/329 200 mm PVC PN12 65.1 2000 23.1

CCP08 06-Sep-08 782,395 7,522,312 M46/329 200 mm PVC PN12 71.8 2000 23.1

CCP09 09-Sep-08 782,389 7,521,908 M46/329 200 mm PVC PN12 72 2000 23.1

CCP10 13-Sep-08 782,387 7,521,485 M46/329 200 mm PVC PN12 71 2000 23.1

CCP16 04-Sep-08 785,609 7,520,783 M46/333 200 mm PVC PN12 59.5 3024 35.0

CCP17 17-Sep-08 782,367 7,519,909 M46/328 200 mm PVC PN12 78 2419 28.0

CCP22 13-Sep-08 789,215 7,519,204 M46/340 200 mm PVC PN12 64 1728 20.0

CCP23 22-Sep-08 789,210 7,518,880 M46/340 200 mm PVC PN12 60 3024 35.0

CCP24 18-Feb-09 789,207 7,518,611 M46/341 200 mm PVC PN12 70.5 3024 35.0

Charlton Bore 08-Dec-06 782,868 7,523,207 M46/329

155 mm PVC PN12 85 1728 20.0


CC-PH-HY-0003_Rev0.

Bore Name Date Drilled GDA94, Zone 50 Tenement Casing Diameter (ND, mm)

Total Bore

Depth (m)

Maximum Pumping Rate

Easting Northing kL/day L/s

Francos Bore ~1 Oct 06 769,253 7,524,413 M46/414

155 mm PVC PN12 70 800 9.3

HEI01 14-Feb-11 772,078 7,523,831 M46/415 300 mm steel & open hole

54.5 1296 15

HEI02 13-Feb-11 772,543 7,523,536 M46/416 300 mm steel & open hole

60.5 1296 15

HEI03 24-Apr-11 773,047 7,523,358 M46/416 300 mm steel & open hole

58 1296 15


61 1296 15


62 1296 15

Thor Bore ~1 Jun 06 794,453 7,517,621 M46/350 155 mm PVC PN9 41 200 2.3

SPI01 23-Sept-11 792,758 7,518,365 M46/344 300 mm steel & open hole

69 1296 15


67 1296 15


69 1296 15

SPI04 16-Aug-11 791,990 7,518,759 M46/345 300 mm steel & open hole

52 1296 15


64 1296 15


70 1296 15

Wild Bore ~1 Jun 06 795,604 7,519,278 M46/349 155 mm PVC PN12 71 180 2.1

WS19P2 21-Aug-08 770,249 7,524,371 M46/414 200 mm PVC PN12 73.5 1037 12.0

WS19P3 15-Aug-08 769,989 7,523,986 M46/414 200 mm PVC PN12 76 1296 15.0

WS20P1 15-Aug-08 776,170 7,523,732 M46/320 200 mm PVC PN12 66 1296 15.0

WS20P2 15-Aug-08 776,514 7,523,852 M46/320 200 mm PVC PN12 66 1296 15.0

WS20P3 15-Aug-08 775,633 7,523,526 M46/321 200 mm PVC PN12 66 1296 15.0

WS21P1 03-Aug-08 781,565 7,518,964 M46/420 200 mm PVC PN12 60 520 6.0

WS21P3 15-Aug-08 781,523 7,518,416 M46/420 200 mm PVC PN12 90 1382 16.0


CC-PH-HY-0003_Rev0.

Appendix 4: Pit region abstraction bore setup


CC-PH-HY-0003_Rev0.



CC-PH-HY-0003_Rev0.

Infrastructure Key Characteristics Comment

End-of-strip pit perimeter bores

Typically up to 110 m depth. ND = 200, 300 or 350mm. Typically screened from the watertable to about 15 m below the base of ore.

Installed prior to below-watertable mining. Typically mine out (decommissioned) in a timeframe of about six months.

Strip-edge dewatering points In-pit abstraction

bores

Typically up to 40 m depth. ND = 200, 300 or 350 mm. Typically screened from the top hardcap to about 15 m below the base of ore.

Resistant to blasting if sufficient distance is maintained from the edge of the blasting front

In-pit sumps

Excavated with existing mining fleet. Typically up to 5 m deep. Suction pump use to abstract sump water to settlement pond.

The excavation of sumps is the responsibility of the mining contractor

Strip-edge abstraction bores

Typically up to 110 metres depth. ND = 200, 300 or 350mm. Typically screened from the watertable to about 15 m below the base of ore.

Installed prior to below-watertable mining. Typically have a longer active abstraction period compared to end-of-strip perimeter bores.

Connecting pipeline

Brackish Typically >=ND110 mm HDPE poly-welded pipelines. Typical pressure rating range is from pressure nomination (PN) of 6.3 bar at 20oC (PN6.3) to PN12.5

The bulk of initial-mining connecting pipeline

Saline May be installed at a later stage if/when saline up coning is evident

Sump Separated due to its extra requirement of sediment-settling prior to injection

Settlement ponds Sump/brackish Typically 160 x 100 m

May also be used to break the pressure of non-sump abstraction Saline

Mining strip Typically 150 m wide and 700 m long. Surface miners require that at least two ore strips be open at one time (within the one mining region).

Various strip orientations


CC-PH-HY-0003_Rev0.



CC-PH-HY-0003_Rev0.

Appendix 5: Injection bore details


CC-PH-HY-0003_Rev0.



CC-PH-HY-0003_Rev0.

Bore name

MGA94 Zone 50

Tenement Casing diameter

(nominal) Total bore depth (m)

Open hole

interval (mbgl)

Easting Northing H

ills

ide

Ea

st

Ex

ten

sio

n HEI01 772,078 7,523,831 M46/415

300 mm steel &

open hole

54.5 31 - 52

HEI02 772,543 7,523,536 M46/416 60.5 45 - 59

HEI03 773,047 7,523,358 M46/416 58 46 - 70

HEI04 773,378 7,523,170 M46/416 61 40 - 58

HEI05 774,511 7,523,246 M46/416 62 47 - 64

Hill

sid

e E

as

t

HSB42 762,808 7,524,817 M46/403

300 mm steel &

open hole

60 30 - 60

HSB43 762,818 7,523,979 M46/406 60 30 - 60

HSB44 763,187 7,524,369 M46/403 60 30 - 60

HSB45 763582 7524,086 M46/403 60 30 - 60

HSB46 764,425 7,524,090 M46/412 60 30 - 60

HSB47 764,832 7,523,992 M46/412 60 30 - 60

HSB48 764,809 7,523,563 M46/412 60 30 - 60

HSB49 765,209 7,523,799 M46/412 60 30 - 60

HSB50 765,614 7,523,980 M46/412 60 30 - 60

HSB51 765,583 7,523,559 M46/412 60 30 - 60

HSB52 766,403 7,523,613 M46/412 60 30 - 60

HSB53 766,796 7,523,481 M46/413 60 30 - 60

HSB54 767,195 7,523,247 M46/413 72 48 - 72

HSB56 768,001 7,523,262 M46/413 66 42 - 66

HSB57 768,499 7,523,477 M46/413 64 46 - 64

HSB58 768,801 7,523,483 M46/413 69 54 - 69

HSB59 769,203 7,523,573 M46/414 66 36 - 66

HSB60 769,616 7,523,186 M46/414 65 42 - 65

HSB61 770,004 7,523,545 M46/414 77 42 - 77

HSB62 770,969 7,523,235 M46/414 76 48 - 76


CC-PH-HY-0003_Rev0.

Bore name

MGA94 Zone 50



Open hole

interval (mbgl)

Easting Northing

HSB63 771,247 7,523,519 M46/414 72 42 - 72

Sp

inif

ex P

ige

on

SPI01 792,758 7,518,365 M46/344

300 mm steel &

open hole

69 53 -69

SPI02 792,476 7,518,417 M46/345 67 51 - 67

SPI03 792,217 7,518,554 M46/345 69 45 - 69

SPI04 791,990 7,518,759 M46/345 52 34 - 52

SPI05 791,835 7,518,953 M46/345 64 52 - 64

SPI06 791,416 7,519,204 M46/345 70 52 - 70

Sal

ine

SAI01 776,041 7,518,262 L49/99

300 mm steel &

open hole

70 49 - 70

SAI01A 782,895 7,515,538 L49/99 80 52 - 80

SAI02 780,795 7,516,788 L49/99 70 47 - 70

SAI03A 781,438 7,516,373 L49/99 69 46 - 69

SAI04 782,195 7,515,947 L49/99 77 40 - 77

SAI04A 777,722 7,518,352 L49/99 76 40 - 76

SAI05 783,665 7,515,128 L49/99 69 46 - 69

SAI06 784,097 7,514,831 L49/99 69 35 – 69

SAI07 784,961 7,514,075 L49/99 46 34 - 46

SAI08 785,318 7,513,638 L49/99 57 33 - 57

SAI09 785,680 7,513,212 L49/99 65 39 - 65

SAI10 786,033 7,512,760 L49/99 41 29 - 41

SAI11 775,195 7,518,540 L49/99 68 40 - 68

SAI12 773,596 7,518,891 L49/99 74 43 - 74

SAI12a 773,912 7,518,807 L49/99 68 40 - 68

SAI12b 773,189 7,518,979 L49/99 68 40 - 68

SAI13 772,086 7,519,252 L49/99 65 44 - 65

SAI13a 772,428 7,519,136 L49/99 68 40 - 68


CC-PH-HY-0003_Rev0.

Bore name

MGA94 Zone 50



Open hole

interval (mbgl)

Easting Northing

SAI14 771,539 7,519,383 L49/99 66 46 - 66

SAI14a 771,850 7,519,270 L49/99 68 40 - 68

SAI15 770,711 7,519,532 L49/99 72 40 - 72

SAI15a 770,954 7,519,438 L49/99 68 40 - 68

SAI16 769,265 7,519,746 L49/99 67 46 - 67

SAI16a 769,731 7,519,636 L49/99 68 40 - 68

SAI16b 768,972 7,519,754 L49/99 68 40 - 68

SAI17 768,586 7,519,902 L49/99 75 37 - 75

SAI17b TO BE SURVEYED L49/99 68 40 - 68

SAI18 767872 7,520,108 L49/99 66 40 - 66

SAI18a TO BE SURVEYED L49/99 68 40 - 68

SAI19 767,138 7,520,233 L49/99 64 42 - 64

SAI20 766,732 7,520,308 L49/99 68 40 - 68

SAI20a TO BE SURVEYED L49/99 68 40 - 68

SAI20b 766,482 7,520,528 L49/99 68 40 - 68

SAI21 779,596 7,516,456 L49/99 68 40 - 68

SAI22 778,552 7,516,951 L49/99 68 40 - 68

SAI23 77,410 7,517,531 L49/99 68 40 - 68


CC-PH-HY-0003_Rev0.



CC-PH-HY-0003_Rev0.

Appendix 6: Proposed abstraction rates at Christmas Creek


CC-PH-HY-0003_Rev0.



CC-PH-HY-0003_Rev0.

Source Use Estimate volume

(kL/year)

CCCP01 CCCP02

CCCAP03

CCCAP04 Accommodation

Village 500,000

Pit-region bores & sumps

CCE12

CCE18

CCE02

CCE10

WS20P1

WS20P2

WS20P3

CCE04

CCE05

CCE02T

CCP17

CCP07

CCP08

CCP09

CCP10

Charlton Bore

CCP16

CCE13

CCE19T

CCP22

CCP23

CCE14

CCP24

CCE41T

Wild Bore

CCE16

Thor Bore

WS19P2

WS19P3

CCE01

WS21P1

WS21P3

HEI01

HEI02

HEI03

HEI04

HEI05

SPI01

SPI02

SPI03

SPI04

SPI05

SPI06

Dust Suppression

&

Construction

Up to 50,000,000


CC-PH-HY-0003_Rev0.



CC-PH-HY-0003_Rev0.

Appendix 7: Christmas Creek conceptual water balance


CC-PH-HY-0003_Rev0.



CC-PH-HY-0003_Rev0.

Rport

CHRISTMAS CREEK CONCEPTUAL SCHEMATIC ANNUAL MINE WATER BALANCE JULY 2013- JULY 2014

I

I I

I I

- -

-

Cloudbreak minesite

•1·2 GL

r

Hill-si-de East borefield

I 13L

I I Abstraction locatio()

~I -=::::: tnjeotion location

Water use/destination

Flinders Pits

12 GL - - -

DEWATERING ABSTRACTION

Wlndlch Pits

-

25GL

Ore Proeess1ng Facility"

SGL

I Saline injection

4 1.5G4

Young Pits I 12.5GL

- - - -

Oust suppression Change in storage, seepage & evaporation

I 2 GL 0.5GL

Camp bores Accommodation ~ village

L_ _ _::;O·.:;.S .::.GL::.J 0.5 Gl

• includes office & workshop use in the ere processing facility

I

I I I

- I

Splnifex borefleld

OGL


CC-PH-HY-0003_Rev0.

CATEGORY AREA (RATE) ML/d Jul-13 Aug-13 Sep-13 Oct-13 Nov-13 Dec-13 Jan-14 Feb-14 Mar-14 Apr-14 May-14 Jun-14 Jul-14

DE

WA

TE

RIN

G (

ML

/Da

y) Flinders 60 40 40 30 30 30 30 30 30 30 30 30 27

Windich 65 71 72 72 72 72 72 72 72 72 72 72 72

Young 0 0 0 0 0 0 60 60 60 60 60 60 60

Camp supply 1 1 1 1 1 1 1 1 1 1 1 1 1

Total (ML/d) 126 112 113 103 103 103 163 163 163 163 163 163 159

Monthly Total (ML/m) 3,780 3,368 3,375 3,075 3,075 3,075 4,875 4,875 4,875 4,875 4,875 4,875 4,782

Cumulative Total (ML) 34,000 3,368 6,743 9,818 12,893 15,968 20,843 25,718 30,593 35,468 40,343 45,218 50,000

INJ

EC

TIO

N (

ML

/Da

y) Hillside East 11 0 0 0 0 0 0 0 0 0 11 11 11

Spinifex 0 0 0 0 0 0 0 0 0 0 0 0 0

Saline Injection 94 91 92 82 82 82 142 142 142 142 131 131 128

Total (ML/d) 105 91 92 82 82 82 142 142 142 142 142 142 139

Monthly Total (ML/m) 3,149 2,743 2,750 2,450 2,450 2,450 4,250 4,250 4,250 4,250 4,250 4,250 4,157

Cumulative Total (ML) 23,631 2,743 5,493 7,943 10,393 12,843 17,093 21,343 25,593 29,843 34,093 38,343 42,500

SIT

E U

SE

(M

L/D

ay

)

CC OPF 16 15 15 15 15 15 15 15 15 15 15 15 15

Dust Suppression & Camp Supply

5 5 5 5 5 5 5 5 5 5 5 5 5

Seepage/Storage/Evaporation 1 1 1 1 1 1 1 1 1 1 1 1 1

Total (ML/d) 21 21 21 21 21 21 21 21 21 21 21 21 21

Monthly Total (ML/m) 631 625 625 625 625 625 625 625 625 625 625 625 625

Cumulative Total (ML) 10,368 625 1,250 1,875 2,500 3,125 3,750 4,375 5,000 5,625 6,250 6,875 7,500


CC-PH-HY-0003_Rev0.

Rport

Appendix 8: Monitoring locations


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CC-PH-HY-0003_Rev0.

Sample point Sample point type Easting (m) Northing (m)

CCSP0001 (Hillside East)

Reinjection discharge pipeline

775,392 7,523,460

CCSP0008 (Spinifex Pigeon) 792,132 7,517,759

CCSP0011 (saline injection - direct) 779,560 7,519,662

CCSP0015 (saline injection - Crank TP outflow) 776,123 7,518,386

CCF01B_S

Monitoring bore (chemical analysis)

786,016 7,515,638

CCF03B_S 792,255 7,510,749

CCFMM01_D 764,360 7,519,791

CCFMM01_S 764,360 7,519,791

CCFMM02_D 770,340 7,518,161

CCFMM02_S 770,340 7,518,161

CCFMM03_D 777,000 7,514,851

CCFMM03_S 777,000 7,514,851

CCFMM04_D 785,610 7,510,127

CCFMM04_S 785,610 7,510,127

CCFMM05_D 794,939 7,504,202

CCFMM05_S 794,939 7,504,202

HSMB29_D 771,257 7,523,532

HSMB29_S 771,257 7,523,532

SAM02_D 785,673 7,513,186

SAM02_S 785,673 7,513,186

SAM07_D 783,697 7,515,171

SAM07_S 783,697 7,515,171

SAM13_D 778,927 7,517,701

SAM13_S 778,927 7,517,701

SCX01_S 769,599 7,520,601

SCX03_S 769,596 7,523,206

SCX04_S 771,221 7,522,594

SXC05_D 774,400 7,520,100

SCX05_S 774,400 7,520,100

SCX06(All) 765,200 7,521,790

SCX06_D 765,200 7,521,790


CC-PH-HY-0003_Rev0.


SXC06_S 765,200 7,521,790

SPM01_D 792,770 7,518,354

SPM01_S 792,770 7,518,354

CCFM0001 (Hillside East)

Flow meter (water use volumes)

772,613 7,522,566

CCFM0003 (OPF TN) 780,201 7,520,207

CCFM0006 (Codgers inflow) TO BE SURVEYED

CCFM0007 (Rubys TN standpipe) 775,994 7,523,653

CCFM0008 (Erin TN standpipe) 783,075 7,522,622

CCFM0009 (CC construction) 771,791 7,523,888

CCFM0010 (Caspian TN standpipe) 783,866 7,524,470

CCFM0011 (Caspian TN standpipe) 783,847 7,524,428

CCFM0012 (Ollie TN standpipe) 779,603 7,524,410

CCFM0013 (Ollie TN standpipe) 779,621 7,524,460

CCFM0014 (U Road standpipe) 789,454 7,516,652

CCFM0015 (Batn TN standpipe) 781,552 7,519,007

CCFM0016 (Baltic TN standpipe) 779,314 7,522,344

CCFM0017 (Elvis TN standpipe) 781,919 7,520,890

CCFM0018 (Elvis TN standpipe) 781,898 7,520,941

CCFM0019 (Flinders SP outflow) 779,781 7,521,144

CCFM0020 (Flinders SP inflow) 779,813 7,521,148

CCFM0021 (Charlton standpipe) 782,891 7,523,242

CCFM0022 (OPF standpipe) 780,190 7,520,179

CCFM0023 (Eyre standpipe) 793,501 7,520,835

CCFM0024 (Airport construction) 790,471 7,517,062

CCFM0025 (Codgers outflow) 776,325 7,523,361

CCFM0026 (M16 TN standpipe) 794,230 7,519,927

CCFM0032 (Crank inflow - north) TO BE SURVEYED

CCFM0033 (Crank inflow - south) TO BE SURVEYED

CCE04MB_S Monitoring bore (model calibration)14 777,634 7,521,609

14 Location and frequency of monitoring for model calibration purposes will change with development of dewatering activities and numerical model certainty.


CC-PH-HY-0003_Rev0.


CCE05MB_S 779,195 7,522,191

CCM03_S 782,397 7,521,482

FLM05 780,061 7,523,158

FLM07_S 780,806 7,523,847

FLM08_S 778,802 7,523,917

FLM09_S 779,822 7,524,533

FLM10 779,675 7,524,189

FLM11 780,122 7,524,146

FLMi05 779,732 7,524,028

WDM02_D 784,501 7,520,641

WDM02_S 784,501 7,520,641

WDM03_D 783,197 7,520,146

WDM03_S 783,197 7,520,146

WDM04 785,402 7,521,244

WDM05 785,402 7,521,244

WDM06 785,786 7,522,034

WDM07 786,251 7,521,894

WDM08 786,175 7,522,571

WDP05 Inactive production bore (model

calibration)23

784,004 7,521,302

22 Mile Bore

Pastoral bore

781,847 7,517,729

Ricks Bore 786,346 7,515,164

Christmas Creek Bore 792,842 7,510,792

Gorge Bore 794,456 7,518,190

DPP11

Contingency discharge site

772,347 7,523,656

CCDP01 787,761 7,516,295

CCDP02 785,411 7,517,866

CCDP03 795,822 7,519,134


CC-PH-HY-0003_Rev0.



CC-PH-HY-0003_Rev0.

Appendix 9: Project trigger levels


CC-PH-HY-0003_Rev0.



CC-PH-HY-0003_Rev0.

Rport

Zone Monitoring Bore

Easting Northing Bore depth

Trigger target aquifer ³

Groundwater level trigger Groundwater quality trigger

(mE) (mN) (mbgl) Baseline groundwater

level (mAHD) Class 1 trigger (+/- m) Class 2 trigger (+/- m) Baseline EC (µS/cm)

Class 1 trigger (µS/cm) 2

Zone A CCFMM01_S 764360 7519791 18.2 Tertiary Detritals 405.2 - 406 0.65^ 1.5^ 118,320 -

Zone A CCFMM02_S 770340 7518157 13.7 Tertiary Detritals 404.8 - 405.2 0.65^ 1^ 69,442 -








(mE) (mN) (mbgl) Baseline groundwater level

(mbgl) Class 1 trigger (mbgl) Class 2 trigger (mbgl) Baseline EC (µS/cm)


Zone B CCE02MB_I 772649 7519912 64.0 Oakover Fmn. 8.71 2.2 1 - 181,473 -

Zone B CCE02MB_S 772649 7519912 27.0 Tertiary Detritals 7.19 3 1 2.2 1 19,841 -

Zone B CCE10MB_I 781132 7515791 64.0 Oakover Fmn. 9.85 2.2 1 - 137,000 -

Zone B CCE10MB_S 781132 7515791 36.0 Tertiary Detritals 10.43 3 1 2.2 1 37,926 -

Zone B SAM01_D 786064 7512762 37.0 Oakover Fmn. 7.01 2.2 1 - 37,320 -


Zone B SAM03_S 785346 7513627 21.8 Tertiary Detritals 7.15 3 1 2.2 1 41,851 -























CC-PH-HY-0003_Rev0.
















Zone B SAM29_S 767874 7520085 16.0 Tertiary Detritals 6.68 3 1 2.2 1 8,181 12,272





















Zone B SAM44_D 769702 7519675 64.0 Oakover Fmn. 3.47 2.2 1 - 127800 -

Zone B SAM44_S 769702 7519675 24.0 Tertiary Detritals 3.47 3 1 2.2 1 92500 -

Zone B SAM45_D 768944 7519799 68.0 Oakover Fmn. 3.06 2.2 1 - 136800 -

Zone B SAM45_S 768944 7519799 22.0 Tertiary Detritals 3.6 3 1 2.2 1 89700 -

Zone B SAM46_D 768301 7519991 53.3 Oakover Fmn. * 2.2 1 - * -

Zone B SAM46_S 768301 7519991 0.0 Tertiary Detritals * 3 1 2.2 1 * -

Zone B SAM47_D 767562 7520114 #N/A Oakover Fmn. * 2.2 1 - * -

Zone B SAM47_S 767562 7520114 #N/A Tertiary Detritals * 3 1 2.2 1 * -


CC-PH-HY-0003_Rev0.












Zone B SCX01_S 769599 7520601 49.0 Oakover Fmn. 5.03 3 1 2.2 1 74,660 -

Zone B SCX06_D 765200 7521790 85.0 Marra Mamba Fn. 8.04 2.2 1 - 133,597 -

Zone B SCX06_S 765200 7521790 72.0 Oakover Fmn. 5.46 3 1 2.2 1 80,064 -

Zone C HEMB01_D 772070 7523841 31.6 Marra Mamba Fn. 15.57 3 1 - 4,615 9,000

Zone C HEMB01_S 772070 7523841 28.9 Tertiary Detritals 15.56 3 1 2.2 1 2,232 9,000





Zone C HEMB05_D 774490 7523249 61.1 Marra Mamba Fn. 17.2 3 1 - 9,656 -


Zone C HSMB24_D 762820 7524818 66.2 Marra Mamba Fn. 20.57 3 1 - 8,386 12,579

Zone C HSMB24_S 762820 7524818 0.0 Tertiary Detritals 20.78 3 1 2.2 1 1,086 9,000




Zone C HSMB26_S 764799 7523552 0.0 Tertiary Alluvium 13.05 3 1 2.2 1 1,376 9,000



Zone C HSMB28_D 767997 7523252 60.0 Marra Mamba Fn. 15.61 3 1 - 10,846 -


Zone C HSMB29_D 771257 7523532 60.0 Marra Mamba Fn. 17.98 3 1 - 16,142 -


Zone C SCX03_D 769596 7523206 61.0 Marra Mamba Fn. 16.26 3 1 - 3,737 9,000

Zone C SCX03_S 769596 7523206 31.0 Tertiary Detritals 16.27 3 1 2.2 1 772 9,000

Zone C SPM01_D 792770 7518354 64.4 Marra Mamba Fn. 22.26 3 1 - 7,436 11,154

Zone C SPM01_S 792770 7518354 50.3 Tertiary Detritals 23.26 3 1 2.2 1 7,057 10,586

Zone C SPM03 792211 7518568 62.6 Marra Mamba Fn. 23.11 3 1 - 1,760 9,000

Zone C SPM05 791825 7518967 52.1 Marra Mamba Fn. 26.67 3 1 - 6,117 9,176

Zone C SPM06_D 791403 7519218 57.6 Marra Mamba Fn. 27.56 3 1 - 6,796 10,194

Zone C SPM06_S 791403 7519218 30.3 Tertiary Detritals 27.91 3 1 2.2 1 1,621 9,000

Zone D CCF03B_S 792255 7510749 0.0 Tertiary Detritals 14.16 16 18 4,474 9,000

Zone D CCF07B_S 782008 7517828 0.0 Tertiary Detritals 14.11 16 18 4,388 9,000


CC-PH-HY-0003_Rev0.








Zone D SCX05_S 774400 7520100 30.3 Tertiary Detritals 7.55 16 18 6,349 9,524

Misc SPM07_D 794830 7514727 63.3 Marra Mamba Fn. 21.04 1.25 1.5 2,156 9,000



Misc SPM10_D 794793 7512103 70.4 Tertiary Detritals 15.79 1.25 1.5 45,874 -

Other CCSP0001 (Hillside East) 775392 7523460 N/A Re-injection Pipeline - - - - 9000

Other CCSP008 (Spinifex Pigeon) 792132 7517759 N/A Re-injection Pipeline - - - - 9000

Other CCSP0011 (Saline injection - direct) 779560 7519662 N/A Re-injection Pipeline - - - - -

Other (CCSP0015 (Saline injection - Crank

TP) 776123 7518386 N/A Re-injection Pipeline - - - - -

1 Where groundwater baseline depth is 3m (Class 1 trigger ) or 2.2m (Class 2 trigger) or less then trigger is set at 20% increase in groundwater levels.

2 If baseline is higher than 9000 µS/cm then no trigger set as water resource is not naturally brackish. Trigger is set at a 50% increase from baseline or 9,000 us/cm, whichever is greatest.

3 Target aquifer for trigger but bore may be screened over other aquifers.

4 Phreatophytic class 1 EC trigger 50% above baseline EC

^ Absolute value change in water level with consideration for seasonally dynamic varying groundwater levels (as outlined in API Part 4 approval). Divergences from seasonally-dynamic levels are assessed from ongoing hydrogeological assessments of the Fortescue Marsh and Fortescue Marsh surrounds.

* Recently commissioned or proposed bores without baseline values or confirmed locations. A baseline value will be calculated after bores have been running for a 6 month period.


CC-PH-HY-0003_Rev0.

Rport

Appendix 10: Trigger reporting procedure


CC-PH-HY-0003_Rev0.


Operating Strategy Trigger NetworkPERTH HYDRO

Class 1 Trigger Class 2 Trigger

Reported to DoW within 72 hours

PERTH ENVIRO

Reported to EPA & SEWPaC within 7 days

PERTH ENVIRO

Report emailed and filed internallyPERTH HYDRO

Report entered into BMS

PERTH ENVIRO

Reported in Groundwater

Monitoring ReviewPERTH HYDRO

Monitoring & Sampling

MINING SERVICES

Internal data QA/QC

MINING SERVICES

Data Upload to Envirosys

MINING SERVICES

Potential trigger exceedance identified

PERTH HYDRO

Data cross checked and validated

MINING SERVICES

Data Error Trigger exceedance

Database Correction

MINING SERVICES

Bore resampledMINING SERVICES

Trigger exceedanceNo trigger exceedance

End

Investigation undertaken & report compiled

PERTH HYDRO

Documents

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