WAMBO COAL PTY LIMITED - Peabody Energy · Subsidence Monitoring Program – South Bates Extension...

WAMBO COAL PTY LIMITED

EXTRACTION PLAN

LONGWALLS 17 TO 20

SOUTH BATES EXTENSION UNDERGROUND MINE

APPENDIX HSUBSIDENCE MONITORING PROGRAM

WAMBO COAL PTY LIMITED SOUTH BATES EXTENSION UNDERGROUND MINE

SUBSIDENCE MONITORING PROGRAM

LONGWALLS 17 - 20

PREPARED BY WAMBO COAL PTY LIMITED

APRIL 2018 Project No. WAM-09-15 Document No. 00910227

Subsidence Monitoring Program – South Bates Extension Underground Mine Longwalls 17-20

SMP LW17-20 Rev A April 2018 Page i

DOCUMENT CONTROL

Document No. SMP LW17-20

Title Subsidence Monitoring Program for South Bates Extension Underground Mine Longwalls 17 to 20

General Description Monitoring program for subsidence effects for mining of Longwalls 17 to 20 at the South Bates Extension Underground Mine

Revisions

Rev No Date Description By Checked

A April 2018 Final for Submission WCPL M. Walker/P. Jaeger

The nominated Coordinator for this document is Technical Services Manager


SMP LW17-20 Rev A April 2018 Page ii

TABLE OF CONTENTS Section Page

1 INTRODUCTION 3

2 SCOPE 3

3 SUBSIDENCE EFFECTS MONITORING AND REPORTING 5 3.1 SUBSIDENCE MONITORING DETAILS 5 3.2 SURVEY ACCURACY AND FREQUENCY 5 3.3 SUBSIDENCE EFFECTS RECORDING AND REPORTING 5

4 MONITORING OF ENVIRONMENTAL CONSEQUENCES 7

5 ROLES AND RESPONSIBILITIES 14

6 REFERENCES 14

LIST OF TABLES

Table 1 Subsidence Effects Monitoring Program Summary

Table 2 Longwalls 17 to 20 Monitoring Program Summary Table 3 Subsidence Monitoring Program Responsibilities Summary

LIST OF FIGURES

Figure 1 Locations of Surface Water and Groundwater Monitoring Sites

Figure 2 Locations of Relevant Biodiversity Monitoring Sites

LIST OF ATTACHMENTS

Attachment 1 Existing and Proposed Subsidence Monitoring Lines

Attachment 2 Subsidence Impact Register


SMP LW17-20 Rev A April 2018 Page 3

1 INTRODUCTION The Wambo Coal Mine is an open cut and underground coal mining operation located approximately 15 kilometres (km) west of Singleton, near the village of Warkworth, New South Wales (NSW). The Wambo Coal Mine is owned and operated by Wambo Coal Pty Limited (WCPL), a subsidiary of Peabody Energy Australia Pty Limited. The South Bates Extension Underground Mine is a component of the approved Wambo Coal Mine. The South Bates Extension Underground Mine is scheduled to commence in Longwall 17 in September 2018 and involves extraction of coal by longwall mining methods from the Whybrow Seam within Coal Lease (CL) 397, Mining Lease (ML) 1594 and ML 1572. The potential environmental impacts of the existing Wambo Coal Mine (including the South Bates [Whybrow Seam] Underground Mine) were assessed in the Wambo Development Project Environmental Impact Statement (the Wambo Development Project EIS) (WCPL, 2003). Development Consent DA 305-7-2003 for the Wambo Coal Mine was granted on 4 February 2004 by the then NSW Minister for Urban Affairs and Planning under Part 4 of the NSW Environmental Planning and Assessment Act, 1979. An application to modify the Development Consent (DA 305-7-2003 MOD 17) to allow the development of the South Bates Extension Underground Mine (Longwalls 17 to 25) in the Whybrow Seam was approved in December 2017. The application was accompanied by the South Bates Extension Modification Environmental Assessment (WCPL, 2017). This Subsidence Monitoring Program forms a part of the Extraction Plan being developed for the approved Longwalls 17 to 20.

2 SCOPE Purpose: This Subsidence Monitoring Program for Longwalls 17 to 20 outlines the monitoring

program for subsidence effects for mining of Longwalls 17 to 20 at the South Bates Extension Underground Mine.

Scope: This Subsidence Monitoring Program covers the Longwalls 17 to 20 Application Area. This Subsidence Monitoring Program has been prepared in accordance with Condition 22C(g) of Schedule 4 of the Development Consent (DA 305-7-2003), as a component of the South Bates Extension Underground Mine Longwalls 17 to 20 Extraction Plan. Condition 22C(g) of Schedule 4 of the Development Consent (DA 305-7-2003) states:

22C. The Applicant must prepare and implement an Extraction Plan for the second workings within each seam to be mined to the satisfaction of the Secretary. Each Extraction Plan must:

...

(g) include the following to the satisfaction of DRG:

...

• a subsidence monitoring program to:

– provide data to assist with the management of the risks associated with subsidence;

– validate the subsidence predictions; and

– analyse the relationship between the subsidence effects and impacts under the plan and any ensuing environmental consequences;

…



This program has been prepared in consideration of the Draft Guidelines for the Preparation of Extraction Plans Required under Conditions of Development Consents, Project Approvals and Mining Lease Conditions for Underground Coal Mining (Version 5) (Department of Planning and Environment and NSW Trade & Investment – Division of Resources and Energy, 2015), which requires: • proposed subsidence monitoring activities (individually specified);

• information or subsidence parameters to be obtained from each monitoring activity;

• proposed locations and/or extents where each monitoring activity will be undertaken, in particular, the proposed layout and/or locations of instrumentation, monitoring points or inspections (including graphical plans);

• proposed timing, frequency and duration of each monitoring activity;

• proposed monitoring methods, technologies, industry standards or Codes of Practice to be applied in undertaking each monitoring activity;

• proposed measures and procedures for quality assurance and competence of personnel undertaking monitoring activities;

• proposed procedures to record monitoring results;

• proposed reporting of monitoring results;

• capacity of the program to detect early warning of deviations from the defined performance measures and associated performance indicators;

• summarise and consolidate the various monitoring programs presented in each of the key component plans; and

• figures showing the monitoring sites for each of the various monitoring programs. Proposed monitoring and reporting of subsidence effects for Longwalls 17 to 20 is described in Section 3. A summary of monitoring of subsidence impacts and environmental consequences is described in Section 4. This Subsidence Monitoring Program has been prepared by WCPL. The appointment of the team of suitably qualified and experienced experts (which includes representatives from WCPL) has been endorsed by the Secretary of the Department of Planning and Environment (DP&E).



3 SUBSIDENCE EFFECTS MONITORING AND REPORTING

3.1 SUBSIDENCE MONITORING DETAILS Subsidence monitoring lines are monitored until negligible subsidence is detected. Discontinuance of survey of these lines will be totally at the discretion of the Principal Subsidence Engineer (NSW Division of Resources and Geosciences [DRG]). The monitoring lines for Longwalls 17 to 20 (Lines 8XL, CL17B and CL19B) will be installed as star pickets driven to refusal with a mark then punched into the top and labelled. The marks will be capped with a protective cover that will be removed during survey. Survey pegs shall generally be a minimum of 10 m and a maximum of 20 m apart. Surveys shall be carried out using either differential levelling to class LC accuracy or Trig heightening methods to an accuracy of class B as specified in the Inter-Governmental Committee on Surveying and Mapping Special Publication 1. LiDAR monitoring lines (Lines CL17A, CL18A, CL19A and CL20A) will be analysed by creating a surface profile along the line from 3 dimensional LiDAR data. The potential for survey error due to displacement of the data will be minimised through the use of fixed reference points outside the angle of draw. This data will be used to provide an estimate of the actual angle of draw to the limit of vertical subsidence data at the commencement ends. LiDAR analysis is considered the most suitable monitoring method given the terrain constrains the ability to use other survey methods. Details of any subsidence impacts observed will be recorded in the Subsidence Impact Register with visual observations documented in the Subsidence Impact Register Assessment Form (Attachment 2). Visual inspections will be undertaken in accordance with the inspection checklist provided in Attachment 2. The Subsidence Impact Register will be maintained as an electronic spread sheet on-site, with hard copies of assessment forms filed in a folder. The data collected under this monitoring program for Longwalls 17 to 20 will be provided to the Division of Resources and Geosciences in a timely fashion and a suitable format.

3.2 SURVEY ACCURACY AND FREQUENCY The prescribed accuracy, as defined by the Inter-Governmental Committee on the Survey and Mapping Special Publication 1 (ICSM SP1) and the required frequency of the surveys can be seen in Table 1.

3.3 SUBSIDENCE EFFECTS RECORDING AND REPORTING Subsidence survey data for the South Bates Extension Underground Mine will be stored by WCPL in a centralised database, with results from each survey clearly demarcated. Subsidence survey data will be provided to the Principal Subsidence Engineer (DRG) promptly following each survey. Subsidence effects will also be reported under the reporting framework of the Extraction Plan.



Table 1 Subsidence Effects Monitoring Program Summary

Survey Line Data Type Survey Accuracy Classification Survey Frequency Survey Status

Visual Inspections

As per the Subsidence Impact Register provided in

Attachment 2

N/A • Within 1 month of longwall extraction that may cause surface movement.

• 3 monthly or more frequent in areas of significance such as creeks, roads and buildings.

• As per monitoring program.

Line 8XL z (level and strain

distances)

ICSM Class B or LC • Twice prior to longwall extraction that will cause surface movement.

• After completion of each longwall block.

• Line to be installed and surveyed prior to commencement of mining.

Line CL17B z (level and strain

distances)




Line CL19B z (level and strain

distances)




Line CL17A Random x, y, z (LiDAR)

<150mm Vert (1 sigma)

• Prior to longwall extraction that will cause surface movement.


• Baseline data to be collected prior to commencement of mining.


















4 MONITORING OF ENVIRONMENTAL CONSEQUENCES The various monitoring programs presented in each of the management plans under the Extraction Plan are summarised in Table 2 and the location of environmental monitoring sites included in WCPL’s various environmental monitoring programs are presented in Figures 1 and 2. Figure 1 presents the location of surface water and groundwater monitoring sites. Figure 2 presents the location of biodiversity monitoring sites. As described in Table 2, visual observation of the Wollemi National Park escarpment will be undertaken as part of the BMP monitoring program. Details of any subsidence impacts observed will be recorded in the Subsidence Impact Register with visual observations documented in the Subsidence Impact Register Assessment Form as provided in Attachment 2. Visual inspections will be undertaken in accordance with the inspection checklist provided in Attachment 2. The Subsidence Impact Register will be maintained as an electronic spread sheet on-site, with hard copies of assessment forms filed in a folder.



Table 2 Longwalls 17 to 20 Monitoring Program Summary

Management Plan Monitoring Component Parameter Frequency

Water Management Plan Bed and bank stability. • Monitoring to distinguish between erosion from mine subsidence instability and erosion from other causes along North Wambo Creek Diversion and Stony Creek.

• In accordance with the SWMP.

Monitoring of surface water quality and flow monitoring sites.

• Monitoring of surface water flow and quality along North Wambo Creek Diversion, Stony Creek and Wollombi Brook in accordance with the SWMP.


Monitoring of groundwater level and quality.

• Monitoring of groundwater level and quality within the vicinity of the Wambo Coal Mine.

• In accordance with the GWMP.

Inflows to underground workings. • Dewatering volumes and underground water levels in accordance with the GWMP.


Diversion and subsidence monitoring program for the North Wambo Creek Diversion.

• As outlined in the SWMP, including: monitoring of Index of Diversion Condition; Landscape Function Analysis (LFA); riparian vegetation; aerial photography; long and cross-section surveys (extracted from LiDAR); and geomorphic condition and efficacy of subsidence management or rehabilitation works.


Visual inspection of the North Wambo Creek Diversion.

• Inspections for surface cracking and/or surface ponding.

• Daily inspections when extraction is occurring directly beneath North Wambo Creek Diversion.

Land Management Plan Fences. • Visual observation to record the condition of fences. • Prior to secondary extraction of Longwalls 17 to 20.

• Prior to secondary extraction within 100 m of any active WCPL fences (i.e. fences being used to hold stock or prevent public access) and undertaken at 50 m intervals until the active mining face is 100 m past the WCPL fence.

• Following completion of secondary extraction of Longwalls 17 to 20.



Table 2 (Continued) Longwalls 17 to 20 Monitoring Program Summary


Land Management Plan (Cont.)

Ground surface. • Visual observation to record the initial condition of the ground surface.

• Visual observations of the ground surface behind the longwall face to identify potential surface cracks.

• Prior to secondary extraction of Longwalls 17 to 20.

• Monthly inspections during secondary extraction of Longwalls 17 to 20, increased to weekly inspections during extraction within 100 m of the North Wambo Creek Diversion.

Cliffs1. • Visual observations of cliffs1 for signs of recent rock fall and/or instability (high definition video/photos recorded via an unmanned aerial vehicle [UAV]).

• Prior to, and following completion of, secondary extraction of each of Longwalls 17 to 20.

Low lying areas. • Visual observations of low lying areas (i.e. the North Wambo Creek Diversion) to identify potential surface ponding.

• Following a significant rainfall event (i.e. 40 mm within 24 hours).2

Surface areas which required remediation.

• Visual observations of the ground surface to identify stabilisation of erosion and groundcover.

• Monthly inspections until stabilisation of erosion and groundcover is >60%.

Biodiversity Management Plan General monitoring of flora, fauna and aquatic ecosystems.

• Monitoring in accordance with the BMP. • In accordance with the BMP.

Subsidence impacts to Wollemi National Park escarpment.

• Visual observations of the Wollemi National Park escarpment for signs of recent rock fall and/or instability (high definition video/photos recorded via an UAV).

• Prior to secondary extraction of Longwalls 17 to 20 and following completion of each longwall in accordance with the LMP.

Heritage Management Plan Artefact scatters, isolated finds and PADs.

• Significant surface cracks and/or erosion in the vicinity of artefact scatters or isolated finds.

• In accordance with the HMP (prior to secondary extraction of Longwalls 17 to 20 and monthly during extraction of longwall panels in immediate proximity to a site).

Rock Shelters with PAD • Inspections to identify instances of block/rock fall, cracking, opening of bedding planes, exfoliation and/or overhang collapse at Wambo Site 507.

• Following completion of secondary extraction of Longwall 20.





Built Features Management Plan – WCPL Asset Management Plan

All built features. • Visual observations to record the general condition of WCPL assets including safety and serviceability.

• Prior to secondary extraction within 1,000 m of WCPL assets.

• Monthly inspection during secondary extraction of Longwalls 17 to 20.

Active service lines.3 • Visual observations to record the general condition of WCPL active service lines including safety and serviceability.

• Daily inspections commencing when secondary extraction is within 100 m of WCPL active service lines and undertaken until the active mining face is 100 m past the line.

Culverts. • Visual observations to record cracking of concrete culverts or grade reversal.

• Prior to secondary extraction within 100 m of culverts and undertaken at 50 m intervals until the active mining face is 100 m past the culverts.

Roads and tracks. • Visual observations to record condition of roads and tracks, including surface cracks, buckling and general safety.

• Prior to secondary extraction within 100 m of any WCPL asset and undertaken at 50 m intervals until the active mining face is 100 m past the WCPL asset.

Mine dewatering and water supply pipelines.

• Monitoring of pipeline integrity at fixed points.

• Monitoring to detect abnormal changes in flow.

• Daily inspections commencing when secondary extraction is within 100 m of WCPL pipelines and undertaken until the active mining face is 100 m past the pipeline.

• Continuous (SCADA) monitoring of pump and pipeline conditions.





Public Safety Management Plan

Fences. • Visual observation to record the condition of fences. • Prior to secondary extraction of Longwalls 17 to 20.

• Prior to secondary extraction within 100 m of any active WCPL fences (i.e. fences being used to hold stock or prevent public access) and undertaken at 50 m intervals until the active mining face is 100 m past the WCPL fence.

• Following completion of secondary extraction of Longwalls 17 to 20.

Warning signs. • Visual observation to record the initial condition of existing warning signs (e.g. legibility).

• Visual observations to record the condition of warning signs (e.g. legibility) during extraction of Longwalls 17 to 20.

• Prior to secondary extraction of Longwalls 17 to 20.

• Monthly inspections during secondary extraction of Longwalls 17 to 20.

Rehabilitation Management Plan (MOP)

Remediate subsidence areas. • Visual monitoring to identify any requirement for maintenance measures and/or remedial works.

• Monthly inspections until monitoring confirms stabilisations of erosion and groundcover is >60%.

Installed sediment control structures.

• Inspection of capacity, structural integrity and effectiveness in accordance with the ESCP.

• Monthly and/or following a significant rainfall event (i.e. 20 mm within 24 hours, midnight to midnight).

1 Cliffs include: the low level cliffs, intermediate level cliffs and cliffs associated with the Wollemi National Park escarpment located within the vicinity of Longwalls 17 to 20. 2 Inspection to occur once access is practicably available following the rainfall event. Inspections will not occur for subsequent rainfall events within 7 days of previous inspection. 3 Active service lines include all services required for mining at the Wambo Coal Mine (electricity supply, telecommunications, water supply and mine dewatering). 4 If no change is detected then this will be documented. If any adverse changes that threaten the stability of the tree are identified, then appropriate stabilisation works and/or salvage will be

considered and undertaken as required.

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WAM-09-15_SBX_EP_LW17-20_SMP_202B

Locations of Surface Water andGroundwater Monitoring Sites

Figure 1

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Kilometres

W A M B O C O A L M I N E±

LEGENDWCPL Owned LandMining and Coal Lease BoundaryExisting/Approved Surface Development AreaApproved Underground DevelopmentRemnant Woodland Enhancement Program (RWEP) AreaExtraction Plan Application AreaGroundwater Monitoring SiteSurface Water Quality Monitoring SiteSurface Water Flow Monitoring Site

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WAM-09-15_SBX_EP_LW17-20_SMP_201A

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W A M B O C O A L M I N E±

LEGENDWCPL Owned LandMining and Coal Lease BoundaryExisting/Approved Surface Development AreaApproved Underground DevelopmentRemnant Woodland Enhancement Program (RWEP) AreaExtraction Plan Application Area

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5 ROLES AND RESPONSIBILITIES Key responsibilities of WCPL personnel in relation to this Subsidence Monitoring Program are summarised in Table 3. Responsibilities may be delegated as required.

Table 3 Subsidence Monitoring Program Responsibilities Summary

Responsibility Task

General Manager • Ensure resources are available to WCPL personnel to facilitate the completion of responsibilities under this Subsidence Monitoring Program.

Mining Engineering Manager (Underground Mine Manager)

• Ensure this Subsidence Monitoring Program is implemented.

Technical Services Manager

• Ensure monitoring and reporting required in accordance with this Subsidence Monitoring Program is carried out within specified timeframes, are adequately checked and processed and are prepared to the required standard.

Environment and Community Manager

• Undertake environmental monitoring required in accordance with the Extraction Plan and ensure the Subsidence Impact Register is kept up to date and hard copies of the assessment forms are filed / stored correctly.

Underground Mining Engineer

• Become familiarised with environmental aspects which require monitoring in accordance with the Extraction Plan.

Mine Surveyor • Undertake all monitoring in accordance with this Subsidence Monitoring Program to the required standard within the specified timeframes and ensure data are adequately checked, processed and recorded.

6 REFERENCES

Department of Planning and Environment and NSW Trade & Investment – Division of Resources and Energy (2015) Guidelines for the Preparation of Extraction Plans Required under Conditions of Development Consents, Project Approvals and Mining Lease Conditions for Underground Coal Mining. Version 5. Draft.

Wambo Coal Pty Limited (2003) Wambo Development Project Environmental Impact Statement.


SMP LW17-20 Rev A April 2018

ATTACHMENT 1

EXISTING AND PROPOSED SUBSIDENCE MONITORING LINES

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.

7

2

8

A

E

x

t

e

r

n

a

l

L

e

a

s

e

B

o

u

n

d

a

r

y

4

2

A hdg

B hdg

A hdg

B hdg

5

7

9

3

4

5

30.0

30.0

123.2

123.2

120.0

131.6

A hdg

B hdg

MG11

6

2

30.0

30.0

3

130.9

120.0

MG11

MG12

A hdg

B hdg

F hdg

Longwall 11

Longwall 12

21.0

F hdg

Belt Road

Travel Road

83.3

32.0

32.0

32.0

22.3

123.2

34.2

3

1

.9

30.0

30.0

30.0

30.2

168.5

B hdg

4

A hdg

B hdg

TG11

A hdg

B hdg

A hdg

TG11

A hdg

B hdg

3

4

.1

150.0

150.0

150.0

150.0

6

2

2

.

3

150.0

150.0

150.0

8

150.0

150.0

10

TG11

170.0

170.0

11

A hdg

B hdg

70.0

70.0

12

TG11

150.0

150.0

13

A hdg

B hdg

150.0

150.0

TG11

B hdg

TG11

120.0

120.0

7

3

4

.1

120.0

120.0

8

3

4

.1

120.0

120.0

9

3

4

.1

10

120.0

11

3

4

.1

120.0

120.0

12

3

4

.1

120.0

120.0

13

3

4

.1

120.0

120.0

14

3

4

.1

120.0

120.0

15

3

4

.1

120.0

120.0

16

3

4

.1

120.0

120.0

17

3

4

.1

120.0

120.0

3

1

.9

5

120.0

120.0

3

1

.9

6

120.0

120.0

3

1

.9

7

120.0

120.0

3

1

.9

8

120.0

3

1

.9

11

120.0

120.0

3

1

.9

12

120.0

120.0

3

1

.9

13

120.0

120.0

3

1

.9

14

110.0

120.0

3

1

.9

16

A hdg

B hdg

MG11

A hdg

B hdg

MG11

A hdg

B hdg

MG11

A hdg

B hdg

MG11

A hdg

B hdg

MG11

A hdg

B hdg

MG11

A hdg

B hdg

120.0

MG12

A hdg

B hdg

A hdg

B hdg

A hdg

B hdg

B hdg

B hdg

B hdg

B hdg

B hdg

MG12

MG12

MG12

MG12

MG12

MG12

1

42.0

A hdg

F hdg

B hdg

1

21.0

75.6

100

200

300

400

500

600

700

800

900

1000

1100

1200

1300

1400

1600

1500

100

200

300

400

500

600

700

800

900

1000

1100

1200

1300

1400

1600

1700

1500

30.0

34.2

15.0

30.2

183.3

28.4

241.7

10.0

50.0

29.1

30.0

50.0

44.8

23.0

34.2

32.7

1

2

1

4

.

0

3

1

.

7

15.0

15.0

53.5

45.8

50.0

57.6

50.0

50.0

20.0

37.6

10.0

30.0

34.2

5.0

31.9

3

4

.

8

G hdg

F hdg

2 c/t R

ecovery R

oad

TG11

157.6

150.0

155.5

3

6

.

7

3

6

.

7

3

6

.

7

3

6

.

7

3

6

.

7

3

6

.

7

3

6

.

7

2

2

.

3

2

2

.

3

1

2

.

0

1

2

.

0

1

2

.

0

1

2

.

0

1

2

.

0 3

1

9

.

6

1

9

.

6

102.1

102.1

14

3

6

.

7

1

2

.

0

9a

32.0

38.4

70.0

50.0

70.0

131.6

32.0

8.0

INS

EA

M B

OR

EH

OLE

(T

G11-1

1-0

1)

520m

TG11-11-01

34.5

59.6

15

72.2

A hdg

21.0

30.0

30.0

30.0

15.0

21.0 21.0

21.0

45.5

46.4

42.0

1a

1

3

.0

TG

11-13-01

19.0

TG11-13-0

2

35.0

35.0

1

142.35

100.0

17

16

30.5

33.6

34.5

34.5

33.6

35.0

35.0

18

32.0

19

32.0

39.9

51.6

29.3

34.0

31.9

1644.7(S

TA

RT

)

22

66.0

7.7

18.8

18

34.5

142.35

100.0

85.7

20

32.0

85.7

19.0

9

8a

30.0

39.1

70.0

50.070.0

30.0

120.0

120.0

3

1

.9

10

89.4

9.5

21

32.0

89.4

76.6

76.6

8

.0

com

menced 17/02/2016

2 c/t R

ecovery R

oad

MG

11-21C

T-01 (P

RO

GR

ES

S)

M

G

11-21C

T-01 (P

RO

G

RE

SS

)

1

6

.0

17

90.6

30.0

3

1

.9

15

86.8

S

B

U

-

M

G

1

1

-

2

2

C

T

-

0

1

(

P

R

O

G

R

E

S

S

)

S

B

U

-

M

G

1

1

-

2

2

C

T

-

0

2

(

P

R

O

G

R

E

S

S

)

S

B

U

-

M

G

1

1

-

2

2

C

T

-

0

3

(

P

R

O

G

R

E

S

S

)

S

B

U

-M

G

1

1

-2

2

C

T

-0

4

(P

R

O

G

R

E

S

S

)

SB

U-M

G11-22C

T-05 (P

RO

GR

ES

S)

SB

U-M

G

11-22C

T-06 (P

RO

G

RE

SS

)

S

B

U

-

M

G

1

1

-

2

2

C

T

-

0

7

(

P

R

O

G

R

E

S

S

)

S

B

U

-

M

G

1

1

-

2

2

C

T

-

0

8

(

P

R

O

G

R

E

S

S

)

S

B

U

-

M

G

1

1

-

2

2

C

T

-

0

9

(

P

R

O

G

R

E

S

S

)

S

B

U

-

M

G

1

1

-

2

2

C

T

-

1

0

(

P

R

O

G

R

E

S

S

)

S

B

U

-

M

G

1

1

-

2

2

C

T

-

1

1

(

P

R

O

G

R

E

S

S

)

S

B

U

-

M

G

1

1

-

2

2

C

T

-

1

2

(

P

R

O

G

R

E

S

S

)

S

B

U

-

M

G

1

1

-

2

2

C

T

-

1

3

(

P

R

O

G

R

E

S

S

)

S

B

U

-

M

G

1

1

-

2

2

C

T

-

1

4

(

P

R

O

G

R

E

S

S

)

S

B

U

-

M

G

1

1

-

2

2

C

T

-

1

5

(

P

R

O

G

R

E

S

S

)

S

B

U

-M

G

1

1

-2

2

C

T

-1

8

(P

R

O

G

R

E

S

S

) S

B

U

-

M

G

1

1

-

2

2

C

T

-

1

7

(

P

R

O

G

R

E

S

S

)

S

B

U

-

M

G

1

1

-

2

2

C

T

-

1

6

(

P

R

O

G

R

E

S

S

)

SBU-MG11-22CT-25 (PROGRESS)

36.3

1

136.9

136.9

96.0

96.0

47.7

23

36.3

33.2

34.6

73.5

32.0

32.0

36.3

1775.2(S

TA

RT

)

T

G

1

1

-1

4

-0

2

T

G

1

1

-

1

5

-

0

1TG11-15-02

TG

11-15-0

2

MG11-20-01



SBU-M

G11-21CT-07 (PROGRESS)


18.8

com

pleted 2/07/2016

MG11-20-02

M

G

11-20-01

MG11-20-02

T

G

1

1

-1

4

-0

2

T

G

1

1

-1

4

-0

2

M

G

1

1

-

2

2

-

2

7

M

G

1

1

-

2

2

-

2

8

B

r

a

n

c

h

A

M

G

1

1

-

2

2

-

2

8

M

G

1

1

-

2

2

-

2

8

M

G

1

1

-2

2

-2

9

MG

11-2-29 (B

ranch A

)

M

G11-2-29 (B

ranch B

)

MG

11-22-29

M

G

1

2

-

1

8

C

T

-

0

3

SBU-M

G12-1

8CT-0

2

S

B

U

-M

G

1

2

-1

8

C

T

-0

2

MG12-18CT-02

M

G

1

2

-

1

8

C

T

-

0

1

M

G

1

2

-

2

0

-

0

1

M

G

1

2

-

2

0

-

0

2

Open

Open

com

menced 4/08/2016

S

B

U

-M

G

1

1

-2

0

C

T

-0

3

S

B

U

-M

G

1

1

-2

0

C

T

-0

3

B

r

a

n

c

h

A

TG

11-8C

T-01

T

G

1

1

-

8

C

T

-

0

1

459m

T

G

1

1

-

8

C

T

-

0

2

T

G

1

1

-

8

C

T

-

0

2

5

9

1

m

T

G

11-17-01

TG

11-17-01

609m

TG

11-12-01

T

G

1

1

-1

2

-0

1

573m

T

G

1

1

-

0

4

-

0

1

T

G

1

1

-

0

4

-

0

1

3

7

5

m

LW

11-P

ER

-01 (B

R

AN

C

H

A

)

L

W

1

1

-

P

E

R

-

0

1

(

B

R

A

N

C

H

B

)

L

W

1

1

-

P

E

R

-

0

1

L

W

1

1

-

P

E

R

-

0

2

L

W

1

1

-

P

E

R

-

0

2

TG

11-13-05

T

G

1

1

-1

3

C

T

-0

5

T

G

1

1

-1

3

-0

3

T

G

1

1

-1

3

C

T

-0

3

T

G

1

1

-

1

4

C

T

-

0

3

TG

11-14C

T-03a

TG

11-14C

T-03b

T

G

1

1

-1

4

C

T

-0

3

c

T

G

1

1

-

1

5

C

T

-

0

5

T

G

1

1

-1

5

C

T

-0

5

T

G

1

1

-

1

5

-

0

3

T

G

1

1

-1

5

-0

3

TG11-15-04

TG11-1

5CT-0

6

M

G

1

1

-1

5

C

T

-0

1

MG

11-17-01

M

G

11-17-01

MG

11-17-01

T

G

1

1

-0

9

-0

1

T

G

1

1

-0

9

-0

1

4

5

9

m

com

pleted 17/12/2016

S

B

U

-

T

G

1

1

-

9

C

T

-

0

2

A

s

D

r

i

l

l

e

d

2

3

7

m

(

a

n

g

l

e

d

h

o

l

e

t

o

W

h

y

n

o

t

S

e

a

m

)

TG

11-2C

T-01

TG

11-2C

T-01

OPEN

B H

DG

SB

X M

AIN

S

TG17

MG17

MG18

MG19

MG21

100

200

300

400

500

600

700

800

900

1000

1100

1200

1300

1400

100

200

300

400

500

600

700

800

900

1000

1100

1200

1500

1300

1400

500

100

200

300

400

700

600

1000

800

900

1200

1100

1300

1400

1600

30.5

100

300

200

800

400

500

600

700

1000

900

1100

1200

1300

1400

1500

1600

1700

100

200

300

400

500

600

700

800

900

1000

1100

1200

1300

1400

1500

1600

12

15

13

3

15

3

6

23

45

6

7

89

10

11

16

14

2

1

7

5 4

6

8

9

14

10

11

12

13

14

16

1

2

45

8

9

10

11

12

13

14

15

16

123

45

6

9

10

11

12

13

15

16

SH

AF

T

7a

7

7a

7

7a

8

8a

6

C

H

D

G

3

5

.

1

3

22

.8

60

.7

25.0

25.0

4

5

25.025.0

25.0

6

25.0

30

.0

2

79.2

90.1

3

3

1

.9

120.0

120.0

5

4

30.0

120.0

120.0

A HDG

120.0

120.0

7

120.0

120.0

8

7

120.0

120.0

9

120.0

120.0

10

120.0

120.0

11

120.0

120.0

12

120.0

120.0

13

14

68.8

68.8

30

.0

15

30.0

16

41.0

41.0

SB

X M

AIN

S

B HDG

A HDG

B HDG

A HDG

B HDG

TG17

A HDG

B HDG

25.0

3

8

.

3

25.0

25.0

8

25.0

25.0

9

25.0

25.0

10

25.0

25.0

11

25.0

25.0

12

25.0

25.0

13

25.0

25.0

14

25.0

25.0

15

25.0

7

A HDG

B HDG

F HDG

41.9

32

.7

55.0

10

1

36.0

65.9

37.8

79.2

2

3

8

.

3

92.3

3

120.0

4

120.0

3

8

.

3

80.1

5

3

8

.

3

6

67.0

36

.0

80.0

80.0

36

.0

93.0

6a

79.9

3

8

.

3

16

120.0

120.0

8

3

8

.

3

120.0

120.0 120.0

9

3

8

.

3

120.0120.0

A HDG

3

8

.

3

11

120.0

12

3

8

.

3

120.0

120.0

3

8

.

3

120.0

120.0

13

120.0

3

8

.

3

14

120.0

3

8

.3

79.7

18.919.9 22.1

98.6

85.542.0

42.0

36.0

15

12

7.7

12

7.7

127.7

12

7.7

41.0

1

A HDG

B HDG

MG17

55.2

B HDG

MG17

A HDG

B HDG

25.0

16

25.068.1

25.0

17

25.0

25.0

18

25.0

13.8

32

.7

32

.0

32

.0

12

7.7

12

7.7

127.7

12

7.7

42.0

1

42.0

Longwall 17

Longwall 18

68.1

55.0

28.0

3

7

.2

1

40.7

A H

DG

22.3

32

.0

3

0

.

0

36

.1

30

.7

30

.7

32

.7

32

.7

32

.7

78.7

78

.7

78

.7

11

1.3

11

1.3

32

.0

11

1.3

32

.0

36

.7

32

.0

36

.7

36

.7

117.3

105.4

105.4

105.4

B H

DG1

17.3

117.3

C H

DG

32

.0

A H

DG

35

.7

32

.0

32

.0

35

.7

35

.7

C H

DG

A H

DG

B H

DG

32

.0

11

7.3

11

7.3

11

7.3

36

.7

32

.0

36

.7

36.7

12

7.7

127.7

12

7.7

120.0

120.0

130.9

120.0

1

6

.

5

8

.

9

56

.9

33

.2

47.4

38

.5

25.0

8

.

9

3

5

.

1

2

1

27

.5

1

25.0

30.7

25.0

35.0

3

7

.

2

LW

17 Install R

d

14

75

.8

(S

ta

rt)

LW

17 P

erim

ete

r R

d

17

120.0

95.0

32.0

31.7

127.7

95.0

32.0

35.7

127.7

3

8

.

3

25.0

25.0

LW

18 Install R

d

18

14

94

.7

(S

ta

rt)

LW

18 P

erim

eter R

d

LW

19 Install R

d

16

65

.8

(S

ta

rt)

LW

19 P

erim

eter R

d

3

7

.2

3

7

.

2

3

7

.

2

3

7

.

2

3

7

.

2

3

7

.2

3

7

.

2

3

7

.

2

3

7

.

2

3

7

.

2

35

.0

35

.0

35

.0

35

.0

35

.0

35

.0

120.0

120.0

120.0

120.0

120.0

120.0

120.0

120.0

80.1

67.3

120.0

120.0

120.0

120.0

120.0

120.0

120.0

120.0

120.0

120.0

120.0

120.0120.0

104.2

117.0

80.0

80.0

79.9

92.6

104.1

104.1

41.0

41.0

41.0

25.0

19

25.0

20

25.0

25.025.0

21

MG20

25.0

22

25.0

25.0

23

25.0

25.0

25

25.0

A HDG

26

25.0

25.025.0

25.0

24

25.0

36

.0

17

Longwall 19

Longwall 20

TG17TG17TG17TG17TG17

TG17

MG17MG17MG17

MG17

MG17

A HDG

B HDG

F HDG

MG18MG18MG18

MG18

MG18MG18MG18

3

7

.

2

3

8

.

3

3

8

.

3

3

8

.

3

3

8

.

3

3

8

.

3

3

8

.

3

3

8

.

3

3

8

.

3

3

8

.

3

3

8

.

3

3

8

.

3

36

.0

36

.0

36

.0

36

.0

LW

20 Install R

d

16

86

.5

(S

ta

rt)

LW

20 P

erim

eter R

d

95.0

32.0

31.7

127.7

95.0

32.0

35.7

127.7

95.0

32.0

31.7

127.7

95.0

32.0

35.7

127.7

3

3

.

0

Longwall 21

LW

21 Install R

d

17

07

.7

(S

ta

rt)

LW

21 P

erim

eter R

d

31

.0

A HDG

B HDG

F HDG

B HDG

F HDG

3

3

.0

55.9

67.2

67.2

40.0

28.7

31.4

27.8

40.9

12

7.7

12

7.7

12

7.7

12

7.7

1

41.0

127.7

12

7.7

12

7.7

127.7

1

39.0

127.7

12

7.7

12

7.7

127.7

1

17

18

3

3

.

0

3

3

.

0

3

3

.

0

3

3

.

0

3

3

.

0

3

3

.

0

3

3

.

0

3

3

.

0

3

3

.

0

3

7

.

2

3

3

.

0

3

3

.

0

3

3

.

0

31

.0

31

.0

MG19MG19MG19MG19

MG19MG19

MG19

MG20MG20MG20

MG20MG20MG20MG20MG20

4

0

.8

2

1

.

8

1

0

5

.

0

4

0

.8

34.9

61.3

1b

A HDG

B HDG

F HDG

3

3

.

0

55.15

67.9

67.9

40.7

28.0

30.7

32.0

17

18

19

3

7

.

2

3

7

.

2

3

7

.2

3

7

.

2

3

7

.

2

3

7

.

2

3

7

.

2

3

7

.2

3

7

.

2

3

7

.2

3

7

.

2

3

7

.

2

3

7

.

2

35.0

35.0

35.0

35.0

MG21

MG21

MG21MG21MG21

MG21MG21MG21

MG21

120.0

SB

X M

AIN

S

SB

X M

AIN

S

SB

X M

AIN

SS

BX

M

AIN

S

4

5

.

2

120.0

104.2

117.3

120.0

120.0

120.0

120.0

120.0

120.0

80.1

67.080.0

80.0

79.9

93.0

120.0

120.0

120.0

120.0120.0

120.0

120.0

120.0

120.0

120.0

120.0

120.0

120.0

124.7

132.2

20.6

20.4

20.6

41.0

41.0

41.0

104.2

115.5

120.0

120.0

120.0

92.6

120.0

120.0

80.0

68.7

80.0

80.0

79.9

91.2

120.0

120.0

120.0

120.0

120.0

120.0

120.0

120.0

120.0

120.0

120.0

120.0

120.0

120.0

120.0

120.0

25.419.2

21.219.8

39.0

39.0

35.3

35.0

104.2

117.0

120.0

120.0

120.0

120.0

120.0

120.0

120.0

120.0

80.1

67.3

80.0

80.0

79.9

120.0

120.0

120.0

120.0120.0

120.0

120.0

120.0

120.0

120.0

120.0

120.0

120.0

120.0

46.634.4

120.0

120.0

127.9

115.2

38.0

38.0

20

.0

20.0

65.9

1b

30.0

30

.0

65.9 30.0

15.0

MG17

TG17

Step over 0.7m

to

create w

alkside

Step over 0.7m

to

create w

alkside

Step over 0.7m

to

create w

alkside

Step over 0.7m

to

create w

alkside

105.4

105.4

105.4

15.0

68.1

83.15

48.0

82.9

67.9

82.9

5.0

Geotechnical R

ecom

mendation

Required

5.0

30.0

30.0

30.0

30.0

30.0

30.0

30.0

30.0

30.0

30.0

33

3 3

33

33

30

.0

5.0

T

G

1

1

-

0

4

-

0

1

sum

p

1a

Application A

rea

Applicatio

n Are

a

3

A hdg

B hdg

2

31.3

120.0

MG16

A hdg

B hdg

2

41.3MG15

A hdg

B hdg

90.0

MG14

2

37.7

A hdg

B hdg

C hdg

A hdg

B hdg

C hdg

S5 M

ains

S5 M

ains

LONGWALL 16

100

200

300

400

500

600

700

800

900

LONGWALL 15

100

200

300

400

500

600

700

800

900

1000

1100

32.0

42.0

42.0

42

.0

38

.4

32.6

1

32.7

32.7

32.7

44.3

25.0

25.0

25.0

25.025.0

25.0

25.0

25.0

25.025.0

25.0

25.0

47.9

60.5

45.2

65.0

38.4

38.4

4

0

.9

10

11

12

13

14

15

16

18

19

12.0

32.0

32.0

25.0

25.025.0

25.0

54.8

90.0

163.7

150.0

4

4

0

.

1

120.0

120.0

5

4

0

.

1

120.0

120.0

6

4

0

.

1

120.0

120.0

7

4

0

.

1

MG14

MG14

MG14

MG14

MG15

MG15MG15

MG15

4

120.0

120.0

5

120.0

6

120.0

120.0

7

120.0

3

3

.

3

90.0

68.4

32.0

1

4

4

.7

1

3

4

.1

32.6

60.5

48.9

MG16

MG16

MG16

8

F hdg

109.1

25.0

25.0

F hdg

18.7

109.1

25.025.0

100.9

100.9

100.9

101.2

101.2

101.2

98.7

98.7

98.7

93.7

93.7

93

.7

A hdg

B hdg

32.0

32.0

32.0

17

32.7

32.7

32.7

1

5

.

0

7.7

32

.7

33.4

32

.0

93.1

93.1

3

37.7

28.1

42.1

51.0

MG14

1

0

32

.7

16.0

1

0

1

0

10.0

15.0

10.0

15.0

11

12

39.4

9

4

0

.

1

1

5

.

0

4

0

.

1

1

5

.

0

132.0

132.0

158.3

158.3

43.7

30.0

13

8

B hdg

B hdg

B hdg

B hdg

A hdg

B hdg

A hdg

B hdg

A hdg

B hdg

A hdg

B hdg

A hdg

B hdg

A hdg

B hdg

A hdg

B hdg

90.0

90.0

120.0

135.0

3

4

5

6

7

8

9

10

11

4

4

.

0

4

4

.

0

4

4

.

0

4

4

.

0

4

4

.

0

4

4

.

0

4

4

.

0

120.0

120.0

120.0

120.0

120.0

120.0

120.0

120.0

120.0

120.0

120.0

120.0

10

4

0

.

11

5

.

0

41.5

39.4

41.5

12

38.5

LW

15

Install R

d

LW

15 P

erim

eter R

d

13

1105.4(S

tart)

77.3

77.3

36.4

14

1

0

.

0

15.0

15

.0

1

5

.

0

15.0

14.0

15.5

120.0

10.0

31.3

31.3

10a

39.4

82.7

39.4

39.4

A hdg

53.3

53.3

1

5

.

0

1

5

.

0

1

5

.0

3

3

.

3

3

3

.

3

1

0

.0

131.4

120.0

88.6

1

0

.0

1

0

.

0

1

0

.0

85.3

20.0

100.0

20.0

100.0

20.0

20.0

120.0

108.6

com

menced 08/02/2018

31.3

9

31.3

90.0

10

72.9

3

6

.

1

227.7

37.4

36.0

11

12

LW

16 Install R

d

LW

16 P

erim

eter R

d

955.7 (S

tart)

50.0

17.7

39.4

39.415.0

10.0

227.7

39.4

9

0

°

A hdg

B hdg

CL11B

CL11B

1

CL12A PRO (LiDAR)

7X

L

7X

L1

7X

L68

7X

L5

7X

L10

7X

L15

7X

L20

7X

L25

7X

L30

7X

L35

7X

L40

7X

L45

7X

L50

7X

L55

7X

L60

7X

L65

7X

L

CL11B

10

CL11B

20

CL11B

30

CL11B

40

CL11B

50

CL11B

53

CL11B

7X

L70

7X

L75

PR

OP

OS

ED

8X

L

7X

L

PROPOSED CL17B

PROPOSED CL19B

PROPOSED CL21B

D

L

1

1

P

R

O

(

L

i

D

A

R

)

CL11A PRO (LiDAR)

CL17A PRO (LiDAR)

CL18A PRO (LiDAR)

CL19A PRO (LiDAR)

CL20A PRO (LiDAR)

CL21A PRO (LiDAR)

8X

L1

8X

L10

8X

L20

8X

L30

8X

L40

8X

L50

8X

L60

8X

L70

8X

L80

8X

L90

8X

L100

8X

L110

8X

L120

8X

L130

8X

L136

CL17B

1

CL17B

10

CL17B

20

CL17B

30

CL17B

40

CL17B

50

CL17B

55

CL19B

1

CL19B

10

CL19B

20

CL19B

30

CL19B

40

CL19B

50

CL19B

55

CL21B

1

CL21B

10

CL21B

20

CL21B

30

CL21B

40

CL21B

50

CL21B

58

0

All measurements are in metres

250 500 750 1000 1250

S

W NE

T

G

1

1

P

O

R

T

A

L

S

S

B

U

W

A

T

E

R

T

A

N

K

M

G

1

1

P

O

R

T

A

L

S

T

XS

h

e

d

F

A

N

S

S

U

M

P

S

T

E

E

P

G

R

A

D

E

S

G

R

A

D

E

1

I

N

5

.

4

F

u

e

l

B

a

y

S

o

u

th

B

a

te

s

U

G

In

-

P

it

D

R

A

I

N

D

U

S

T

S

T

O

N

E

IG

L

O

O

GA

TE

9

G

R

A

D

E

1

I

N

2

.

9

G

R

A

D

E

1

I

N

5

.

5

D

R

A

I

N

G

A

T

E

E

d

g

e

o

f H

a

r

d

B

e

n

c

h

E

d

g

e

o

f

H

a

r

d

B

e

n

c

h

E

d

g

e

o

f

H

a

r

d

B

e

n

c

h

D

R

A

I

N

D

R

A

I

N

D

R

A

IN

IG

LO

O

T

X

S

H

E

D

T

X

S

H

E

D

C

A

U

S

E

W

A

Y

Stony

Creek C

rib

R

o

o

m

M

G

1

2

P

O

R

T

A

L

S

F

ire

S

ta

tio

n

B

U

R

IE

D

D

R

A

IN

A

G

E

P

IP

E

(2

X

7

0

0

m

m

ID

)

N

W

R

E

P

E

A

T

E

R

NorthW

ambo Creek

P

E

R

I

M

E

T

E

R

T

R

A

I

L

R

O

A

D

T

R

A

I

L

P

E

R

I

M

E

T

E

R

RO

AD

I

G

L

O

O

IG

L

O

O

S

2

C

O

N

V

E

Y

O

R

H

IG

H

W

A

L

L

M

E

S

H

B

A

S

E

O

F

M

IN

O

R

C

L

IF

F

S

B

A

S

E

O

F

M

A

J

O

R

C

L

I

F

F

S

B

A

S

E

O

F M

IN

O

R

C

LIF

FS

BA

SE

O

F

BA

SE

O

F E

SC

AR

PM

EN

T

HIG

HW

ALL C

RE

ST

GA

TE

6

IG

L

O

O

IG

L

O

O

T

X

S

h

e

d

S

B

X

P

O

R

T

A

L

E

S

C

A

R

P

M

E

N

T

Application Area

Full Extraction BoundaryCurrent Open Cut Extraction

Approval Area

Underground Workings

Wollemi - Homestead

(Whybrow Seam)

Revision No.

Drawing No.

CheckedDrawnScale:DateSheet Size

Approved

WAMBO COAL PTY LIMITED

Prepared by NWU Survey Ph: 02 65 702318

ABN 13 000 668 057

Jerry's Plains Rd, WarkworthVia Singleton, NSW, 2330

Phone: 02 65 702200Fax: 02 65 702290

South Bates Underground Mine (Whybrow Seam)

Extraction Plan - Longwalls 17 to 20

Plan 7 - Proposed and Existing Subsidence Monitoring

A 31/03/2018 MJW MB,PJ

(Whybrow/Wambo Seam)

Wambo Opencut Void

3

0

4

0

5m Contours (AHD)

For LW17 to LW20 Submission

Monitoring Marks

Existing Subsidence

Depth of Cover

7XL95

9

0


South Bates Whybrow

Underground Proposed Workings

South Bates Whybrow

Monitoring Marks for

Proposed Subsidence

1XL95

South Bates Underground

Monitoring LiDAR

Proposed Subsidence

Profile Locations

(South Bates UG)

Contours


South Bates Wambo


SMP LW17-20 Rev A April 2018

ATTACHMENT 2

SUBSIDENCE IMPACT REGISTER


SMP LW17-20 Rev A April 2018 Page A2-1

Table A2-1 Example Subsidence Impact Register (Electronic Version Maintained On-Site)

Impact Register Number1

Impact Description

Does Impact Exceed the Performance

Measure/Indicators?

(Yes/No/ Not Applicable)

Management Measures Implemented

Were Management

Measures Effective?

(Yes/No)

Notes:

1: Fill out all details in the Assessment Form and record the register number here.



SUBSIDENCE IMPACT REGISTER ASSESSMENT FORM

Date and Time

Observer (Name and position)

Register Number (i.e. Number 1, 2, etc.)

Longwall Number

Longwall Chainage

Area Inspected Examples: location of crack, include GPS co-ordinates and a sketch

INSPECTION ITEM CHECKED COMMENTS (Examples: nature and extent of impact, any relevant

information, attach photographs)

Surface Cracking

Surface Humps (compression)

Surface Ponding

Access Tracks/Serviceability of built features

Warning Signage

Powerline – poles, insulators, conductors, conductor clearance

Other

Actions Required

Management or Contingency Measures Implemented

Effectiveness of Management or Contingency Measures

WCPL Key Personnel Notified (include date of email)

Technical Services Manager __/__/____

Environment and Community Manager __/__/____



SUBSIDENCE INSPECTION CHECKLIST WHERE TO INSPECT • 500 metres behind and 100 metres in front of the current longwall face position. EXTENT OF INSPECTION • Include the area of active subsidence based on the 26.5 degree angle of draw. WHAT TO LOOK FOR • Surface Cracking: inspect edges of extraction void and travelling abutments.

• Surface Humps: inspect near centre of extracted panels and travelling abutment.

• Surface Ponding: inspect low lying areas for evidence of increased/new ponding.

• Access Tracks: inspect for step change in land surface and changes in access for serviceability.

• Warning Signage: inspect condition and legibility of relevant warning signage.

• Powerlines: inspect for changes of conductor clearance and power pole condition.

• Check the serviceability of built features (e.g. fences, buildings, dams and access tracks).

• Note any flooding hazards for access tracks.

• Carry out any inspections required in accordance with the Built Features Management Plan for Longwalls 17 to 20.

ACTIONS IF AN IMPACT IS IDENTIFIED 1. Employ additional subsidence warning signs if necessary.

2. Notify Key Personnel (including asset owner if relevant [e.g. if asset is not a WCPL-owned asset]).

3. Assess impact against requirements of the relevant TARP and implement actions as required.

4. Record implemented actions in the Subsidence Impact Register Assessment Form.

5. Notify the Principal Subsidence Engineer (DRG).

6. Notify other stakeholders as required (e.g. DP&E, DRG etc.).

WAMBO COAL PTY LIMITED - Peabody Energy · Subsidence Monitoring Program – South Bates Extension...

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