Glencore XstrataWestside StoryMine Closure and RehabilitationNeil Rae Operations ManagerSeptember 2013

3Glencore - Australian Coal assets

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Westside Mine Location

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• Located near Newcastle, North West of Lake Macquarie• Mine Life – Coaling from 1992 to 2012• Mine type – Contract open cut operation• Equipment - Truck and Shovel operation with Dozer push • Annual ROM Production - <1Mtpa• Market – Domestic thermal coal• Great Northern and Fassifern seams extracted

Westside Mine

Site Description

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Westside Mine

Aerial progress photographs

1999 2003

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Westside Mine

Aerial progress photographs

2007 2010

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Westside Mine

Integration of Mining sequence and rehabilitation

Key Drivers

• No Highwalls to be left on site

• Minimise time between finish of mining and finish of bulk shape

• Minimise carbonaceousmaterial on the surface• Sequence overburden removal and de-coaling to meet

these objectives

South Pit

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Westside Mine

Integration of Mining sequence and rehabilitation

Coaling direction

Dump progression against East highwall

South Pit / Future Final VoidSnap shot in Sept 2011

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Westside Mine

Final Void Rehabilitation - Shaping

Final Void Shaping- Bulk shaping completed 1 week after coaling completed

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Westside Mine

Integration of Mining sequence and rehabilitation

Final Void- Mining Completed Feb 2012 (1 x D11 on bulk shape)- Rehab completed April 2012 (1 x D6 rip/contour drains, 1 x 20t digger, 1 x 20t truck)

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Westside Mine

Rehabilitation Methodology

•Bulk shape

•Spread topsoil

•Contour drains

•Spread bulk ameliorants (Gypsum)

•Rip on contour

•Gather rocks into mounds

•Seed Preparation/mixing

•Seed/Fertiliser broadcasting

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Westside Mine

Rationalisation and Mine Closure

3Rehabilitation Status

Comments:• December 2012 Rehabilitation

• Haul road width reduction to minimise dirty storm water run-off

• Bunds removed, drains constructed and revegetated with couch grass

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Westside Mine

Mine Closure activities

• Conceptual Mine Closure Plan;

• Annual E & C Broad Brush Risk Assessments/reviews;

• Pre Feasibility Constraints and Opportunities Analysis;

• Contamination Assessments;

• Kepner Tregoe Analysis of indentified land use options for each domain;

• OCAL Reject Emplacement Strategy;

• Final Void Management Plan;

• Closure cost reviews;

• Mine Closure Consultation Strategy;

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Westside Mine

Mine Closure activities (continued)

• Mine Closure Project Schedule;

• Site geotechnical analysis including slope stability;

• Mine Closure Risk Assessment;

• Final Land Use Strategy;

• Closure Criteria Development and sign-off;

• Mine Closure MOP;

• Westside Closure Project execution plan (Bucket list);

• Small workforce, redundancies/retention option, re-employment within the industry;

• Ongoing Land/Water Management and rehabilitation monitoring.

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• Closure criteria were developed using more than 10 years of biodiversity and

rehabilitation monitoring for inclusion in the Mine Closure MOP

• Each mine closure domain has its own criteria based on proposed final land use

• Closure criteria were approved by the Department of Resources and Energy.

Mine Closure and Rehabilitation

Closure Criteria Development

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Westside Mine

Westside Mine Domains

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Westside Mine

Signed-off Closure criteria

• Criteria are broad, straight forward and relatively easy to assess.

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Westside Mine

Signed-off Closure criteria

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Westside Mine

Signed-off Closure criteria

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North Pit Rehabilitation

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• Second generation tree seedlings are present

• More than 75% of trees are healthy and growing

• No treeless areas greater than 0.5 ha are present

• Monitoring demonstrates considerable soil profile development

• 70% of nest boxes in Northern Rehabilitation occupied by native arboreal mammals.

• 30 native flora species present • 32 native fauna species present

Biodiversity monitoring

3Rehabilitation Sign off

• The Dept Resources and Energy has provided confirmation that the North Pit Rehabilitation area is progressing satisfactorily towards the agreed closure criteria.

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• High levels of species

diversity (over 34 native

species present)

• High level of regeneration

and recruitment

• Over 40 fauna species

recorded

• Three threatened fauna

species identified

Biodiversity monitoring

South Pit Rehabilitation

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Rehabilitation

South Pit Rehabilitation, near Dam E - Progression

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Westside Mine - Aerial view June 2013

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Westside Story Video

Westside’s Life of Mine Rehabilitation