Containment Solutions for Mining

Supporting Safe and Sustainable Extraction of Critical Minerals

As rare-earth and critical minerals become increasingly vital to the global economic growth and security, the need for safe, reliable, and sustainable extraction has never been greater. These resources underpin essential industries ranging from infrastructure and manufacturing to advanced technologies and the energy transition, making consistent supply dependent on operations that protect workers, surrounding communities, and the environment. EFI supports responsible mining through the design and installation of high-performance geomembrane systems engineered to safeguard soil and groundwater, control seepage, and enhance overall site safety. By integrating geomembranes into mine operations, producers can mitigate environmental risk, extend the life of critical assets, and maintain regulatory compliance while managing costs. In doing so, EFI helps mining companies meet today’s economic and production demands while demonstrating a long-term commitment to environmental stewardship and responsible resource development.

A modern wooden house with a metal roof in a field of tall grass, overlooking a lake with mountains in the background during twilight.
  • Scenic landscape with a lake, green rolling hills, and mountain range under cloudy sky.

    Tailings Impoundment

    · Line containment ponds and impoundments to prevent groundwater contamination.

    · Serve as part of composite liner systems (geomembrane + GCL).

    · Used in capping and closure systems to reduce infiltration post-mining.

  • Frac Pond of Gas Extraction

    Frac Ponds

    · Contain aggressive leaching solutions (e.g., sulfuric acid, cyanide).

    · Facilitate solution collection and recovery through drainage layers.

    · Withstand high compressive loads and elevated temperatures.

  • Evaporation Pond of rLithium Mining

    Evaporation Pond for Lithium Mining

    · Contain highly acidic or alkaline process waters used in metal extraction.

    · Ensure long-term chemical resistance and UV stability.

  • Modern wooden Waste Rock & Leachate Containment with stone steps leading up to it, situated in a mountainous landscape with snow-capped peaks in the background.

    Waste Rock & Leachate Containment

    · Prevent acid mine drainage (AMD) migration.

    · Direct runoff toward collection or treatment systems.

    · Reinforce embankments in waste rock piles.