Glencore Xstrata Westside Story Mine Closure and Rehabilitation Neil Rae Operations Manager September 201
Glencore - Australian Coal assets
Location
Site Description 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 4
Aerial progress photographs 1999 200 5
Aerial progress photographs 2007 2010 6
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 South Pit Minimise carbonaceous material on the surface Sequence overburden removal and de-coaling to meet these objectives 7
Integration of Mining sequence and rehabilitation Dump progression against East highwall Coaling direction South Pit / Future Final Void Snap shot in Sept 2011 8
Final Void Rehabilitation - Shaping Final Void Shaping - Bulk shaping completed 1 week after coaling completed 9
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) 10
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 11
Westside Mine Rationalisation and Mine Closure 12
Rehabilitation 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
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; 14
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. 15
Mine Closure and Rehabilitation Closure Criteria Development 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. 16
Westside Mine Domains 17
Signed-off Closure criteria Criteria are broad, straight forward and relatively easy to assess. 18
Signed-off Closure criteria 19
Signed-off Closure criteria 20
Biodiversity monitoring North Pit Rehabilitation 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. 0 native flora species present 2 native fauna species present 21
Rehabilitation Sign off The Dept Resources and Energy has provided confirmation that the North Pit Rehabilitation area is progressing satisfactorily towards the agreed closure criteria.
Biodiversity monitoring South Pit Rehabilitation High levels of species diversity (over 4 native species present) High level of regeneration and recruitment Over 40 fauna species recorded Three threatened fauna species identified 2
Rehabilitation South Pit Rehabilitation, near Dam E - Progression 24
Westside Mine - Aerial view June 201 25
Westside Story Video Westside s Life of Mine Rehabilitation 26