Land and biodiversity management
Energy use, greenhouse gas emissions and climate change
Air quality, noise and vibration management
Mine closure planning
For our performance see our Sustainability Report.
for the environment is a core part of MMG’s business strategy - we are
committed to minimising our environmental footprint and our use of
Our environmental management approach is based
on the on the principles of plan, do, check, act and aligns to the
principles of ISO14001. Our approach involves identification, assessment
and control of material risks across all phases of our business, from
exploration to through to development, operation and then closure. We
work in partnership with our stakeholders to understand the challenges
and opportunities of our activities, and how best to manage them.
MMG Environment Standard defines MMG’s minimum requirements and
provides the basis for sustainable environmental management through its
deployment at our operations. These requirements are audited as part of
an integrated assurance process.
Through the application of the
MMG Operating Model, our operations focus on essential environmental
delivery work, supported by functional excellence that drives continual
improvement of our management processes.
is used across every part of the mining lifecycle. We seek to manage
our water resources responsibly to maintain the health of local
ecosystems and to preserve sustainable regional water quality and
Each of our operations and projects face different water
challenges. Some are located in water-scarce environments. Others need
to manage surplus water or the quality of water we use and discharge to
the environment. Through annual reviews of water balance models and
water management plans we continuously improve our management of
material water risk events to achieve positive environmental, social
and production outcomes.
Where possible, our operations aim to
improve our water use efficiency and to maximise water recycling. We
report our water inputs, outputs and diversions in line with the
Minerals Council of Australia (MCA) Water Accounting Framework.
monitor the concentrations of heavy metals and other contaminants in
water at our operations. We use water retention and treatment processes
to maintain the concentration of contaminants in discharged water within
acceptable water quality limits. We also monitor water quality and
other indicators of ecosystem health in our receiving environments.
Water sampling at Rosebery, Tasmania.
mining and processing operations generate mineral waste (such as
tailings and waste rock) and non-mineral wastes (such as oils and
general refuse). Understanding the characteristics of the waste streams,
and planning and managing accordingly, assists us to mitigate any
potential long-term environmental impacts and also minimise operating
costs. Effective waste management programs also help us manage water
quality and successfully rehabilitate land.
Our Waste Management
Plans address design and location considerations for new storage and
disposal facilities, and operational management and monitoring, to
minimise long-term impacts, including those related to acid and
metalliferous drainage (AMD).
We are striving to integrate mineral
waste management within life-of-asset planning, to manage our waste
facilities in a way that is consistent with final landform designs. This
will promote beneficial post-mining land uses and reduce post-mining
rehabilitation and closure costs.
Vegetation growing on Century’s South West Rock Dump.
owns, leases and manages large areas of land for its exploration and
operational activities. To effectively manage this land, its flora and
fauna, we consult and work with local stakeholders to understand the
land’s ecological and community values, and to communicate plans for our
We aim to avoid or minimise our impacts on the
landscape and ecosystems. Where they are unavoidable, we invest to
balance the impacts with rehabilitation measures and biodiversity offset
Progressive rehabilitation at Sepon.
our ongoing efforts to improve asset utilisation, business efficiency
and operating costs, we optimise the efficient use of energy and
minimise greenhouse gas emissions.
Accessing a secure supply of
energy is necessary for our continued growth. Increased demand for
energy, local power generation and transmission supply issues, and
political and regulatory uncertainties are among the factors that
influence our energy use. MMG is addressing these risks by improving
the energy efficiency of our operations, negotiating long-term contracts
with energy providers and using diverse power sources.
Renewable energy (hydropower) is the predominant form of purchased electricity used at Sepon, Kinsevere and Rosebery.
report our energy use and greenhouse gas emissions in accordance with
the World Resources Institute/World Business Council for Sustainable
Development Greenhouse Gas Protocol, the Australian Government’s
National Greenhouse and Energy Reporting Act 2007, and our International
Council on Mining and Metals’ (ICMM) membership.
We engage with
our stakeholders on climate change issues through relevant industry
associations such as the Minerals Council of Australia (MCA) and the
ICMM. As an ICMM and MCA member, we support the Councils’ work with
governments and other stakeholders to develop simple and effective
climate change policy and regulation.
identify the major sources of air, noise and vibration emissions
related to our activities and assess their potential impacts on the
environment and local communities. We routinely monitor these emissions
and manage them through the design and implementation of emission
are committed to minimising the legacy impacts of our operations on the
environment and local communities. Through our mine closure planning
and execution process we address risks related to public health and
safety, post-closure environmental impacts, and potentially adverse
socio-economic impacts. We adopt a life-of-asset approach to closure
planning that includes technical assessment, forecasting, and
consultation with relevant stakeholders. Plans tailored for each stage
of closure development focus our business resources on operations
closest to the end of their life cycles.
Find out more about Century mine’s closure.
Closure works at Century include aerial seeding (foreground) and bulk sample waste rock dump relocation earthworks (background).