Repurposing closure cost estimation tools: a Gold Fields case study of the benefit of integration

Author(s): 
R Getty (SRK Consulting), D Caporn (Gold Fields Ltd), D Kyan (SRK Consulting), J Beltran (SRK Consulting)
Date: 
Thursday, September 5, 2019
First presented: 
Mine Closure 2019
Type: 
Published paper
Category: 
Environmental/Social
 
Closure cost estimation tools such as the publicly available Standardized Reclamation Cost Estimator (SRCE) are widely used to determine closure cost estimates for a wide variety of purposes. The SRCE was developed to provide a robust, defensible calculator for mine closure financial assurance by the State of Nevada, USA, and has been used internationally for financial assurance (FA) cost estimates, Life of Mine (LOM) and Provision for Environmental Rehabilitation (PER) and for internal closure cost estimates. 
 
Minimising the liability of closure costs is increasingly important for mine planners, as experience dealing with mature mine sites has led to a better understanding of the magnitude of actual closure costs, and as company management seeks to reduce ongoing liabilities associated with unrehabilitated land. In this context, Gold Fields has been working with the added functionality of the SRCE v2.0 in relation to its St Ives operations to repurpose use of the closure cost model to facilitate real time planning and management of mine closure. Specifically, the flexibility of the SRCE has been used at St Ives to analyse closure options. This has provided benefits by reducing long-term closure costs by adapting short-term mine plans to accommodate the extended view of the mine life.

Feature Author

Jason Beltran

Jason Beltran has over 14 years’ experience in the GIS industry. His expertise in GIS project management includes implementing procedures for digital map creation and best practices in GPS field mapping. He currently manages all GIS data within SRK, developing systems using ESRI’s ArcGIS Server technology to publish and share digital mapping data across the organisation. Since joining SRK, Jason has worked on projects that require map production for publicly released reports, providing technical GIS support and database administration for smaller junior miners. He also specialises in closure cost estimations utilising the closure cost modelling Standardised Reclamation Cost Estimate (SRCE) model. In addition,m Jason has experience in design of geological maps, and has worked on various mapping projects that require the use of analytical GIS, such as viewshed analysis and floodplain mapping.

Senior Consultant (GIS)
BSc (Geographical Information Systems)
SRK Perth
Rebecca Getty

Rebecca is an environmental management professional with over 10 years’ experience in the mining industry. Her experience as an environmental advisor includes mine closure, environmental management plans and environmental approvals. She commenced her career as an exploration geologist, responsible for supervising drill programs and preparing technical and statutory reports.  She has designed, implemented and managed exploration programs for greenfields, mine definition and multi-stage projects in Australia and Canada. Rebecca’s experience in technical reporting includes authoring and co-authoring of reports across scoping, pre-feasibility and feasibility study levels according to international reporting guidelines, JORC Code and NI 43-101. Rebecca has strong project management and risk assessment skills.

Senior Consultant (Environmental and Mine Closure)
BSc (Hons) Geology, MAusIMM, MAIG
SRK Perth
Danielle Kyan

Danielle Kyan has over 13 years’ experience working as a consultant to the mining industry.  She specialises in closure cost estimations (utilising closure cost modelling including the Standardized Reclamation Cost Estimate (SRCE) model), GIS compilation, data management and data interrogation across a range of commodities.  Danielle’s project management experience in closure cost estimation allows her to understand client requirements, address problems as they develop, and communicate effectively with clients to ensure the cost model aligns with the closure plan and client expectations. Danielle has experience in project management, closure planning, image processing, graphic design, research, data management and GIS, and is proficient in both MapInfo and ArcGIS platforms.

Senior Consultant (Environment)
BAppSc Hons (Geology), MAusIMM
SRK Brisbane
SRK North America