Indonesia Approves Updated Environmental Plan for Sumatra Zinc Mine
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Indonesia's environment ministry has approved an updated environmental impact assessment for a zinc and lead mine in North Sumatra. The new plan removes a proposal for a permanent waste dam and instead proposes using a cemented paste backfill method to manage waste underground. This approval follows a 2024 Supreme Court ruling that forced the ministry to rescind its earlier approval.
Facts First
- Indonesia's environment ministry approved a new environmental plan for a zinc and lead mine in North Sumatra
- The updated plan removes a proposal for a permanent tailings dam located in an earthquake-prone region
- The new plan proposes using cemented paste backfill to mix waste with cement and inject it underground
- The approval follows a Supreme Court ruling in 2024 that forced the ministry to rescind its earlier approval
What Happened
The environment ministry issued a new approval for the zinc and lead mine in the Dairi district of North Sumatra province. The approval is for an updated environmental impact assessment (Amdal) produced by PT Dairi Prima Mineral (DPM). The updated Amdal removes a previous proposal to hold mining waste sludge behind a permanent dam. It instead proposes a process called cemented paste backfill, which involves mixing mining waste with cement and water and injecting it into mined-out voids underground. This new approval follows a 2024 ruling by Indonesia's Supreme Court that forced the ministry to rescind its earlier approval for the mine.
Why this Matters to You
If you live in or near the earthquake-prone Dairi district, the change in waste management plan could affect your local environment and safety. The removal of a permanent surface dam may reduce the risk of a catastrophic dam failure, especially in a seismically active area. However, the long-term environmental impact of the new underground injection method is not yet fully known, and you may want to monitor how it is implemented.
What's Next
The mine operator, PT Dairi Prima Mineral, is likely to proceed with implementing the cemented paste backfill waste management system as outlined in the approved Amdal. Local residents and environmental groups may continue to scrutinize the project's operations, given the region's seismic activity and the history of legal challenges to the mine's approval.