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Environmental Stewardship: Aggregate Performance

Through TSM, mining operations have access to best practices in tailings management and biodiversity conservation management and are evaluated on their performance in these areas. TSM helps to ensure that mining operations manage their tailings facilities responsibly to protect human safety and the environment. Mining facilities must also adopt management systems and set targets to limit impacts to local biodiversity and are encouraged to collaborate with local conservation groups to improve outcomes.

Tailings Management

Percentage of Facilities at a Level A or Higher – 2006, 2017 and 2018
Level A Level AA Level AAA
Tailings management policy and commitment

2006

2017

2018

Tailings management system

2006

2017

2018

Assigned accountability and responsibility

2006

2017

2018

Annual tailings management review

2006

2017

2018

Operation, maintenance and surveillance (OMS) manual

2006

2017

2018

100%

90%

80%

70%

60%

50%

40%

30%

20%

10%

0%

To achieve a Level A, TSM requires a facility to implement a system for responsible tailings management. This includes assigning executive-level accountability and responsibility for tailings management and developing and maintaining an operation, maintenance and surveillance (OMS) manual. A facility must also evaluate the performance and adequacy of their tailings management system annually. The protocol is based on MAC’s three tailings management guides.

Following the tailings incident at the Mount Polley Mine in August 2014, MAC initiated internal and external reviews of its TSM Tailings Management Protocol and guides. Both reviews confirmed their strength, but identified opportunities to incorporate proven and emerging best practices for tailings management. A revised protocol and Guide to the Management of Tailings Facilities were released in 2017. A summary of the revisions can be found in the 2017 TSM Progress Report.

Biodiversity Conservation Management

Percentage of Facilities at a Level A or Higher – 2013, 2017 and 2018
Level A Level AA Level AAA
Commitment, accountability and communications

2013

2017

2018

Conservation planning and implementation

2013

2017

2018

Reporting

2013

2017

2018

100%

90%

80%

70%

60%

50%

40%

30%

20%

10%

0%

To achieve a Level A, TSM requires facilities to establish formal commitments to manage biodiversity at their sites and ensure that action plans for significant biodiversity aspects are implemented. Facilities must also implement biodiversity reporting systems to inform decision-making and communicate their performance publicly.

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