U.S. EPA Contaminated Site Cleanup Information (CLU-IN)

U.S. Environmental Protection Agency
U.S. EPA Technology Innovation and Field Services Division
Characterization, Cleanup, and Revitalization of Mining Sites

Training and Events


  • CLU-IN Webinar Series on Mining Sites - OSRTI's Technology Innovation and Field Services Division launched a CLU-IN webinar series on treatment technologies at mining sites in June 2012. Topics include technology transfer, innovative and ecological approaches to dealing with mining waste, reuse and recovery technologies, and other related focus areas. The webinars are held on a quarterly basis and listed under Upcoming Internet Seminars (below). Archives of past webinars can be found under Archived Internet Seminars, Videos, and Courses.
  • Region 10 Workshops on Hardrock Mine Geochemistry and Hydrology - EPA's Region 10, Office of Research and Development (ORD), and Office of Superfund Remediation and Technology Innovation (OSRTI) hosted a three-part webinar series in February and March 2013 that focused on evaluating the potential for contaminant release from hardrock mine sites. Topics included water chemistry, potential sources of contamination from mine sites, and mitigation and reclamation practices to protect natural resources. Information on webinar archives and resources can be accessed below through Workshops on Hardrock Mine Geochemistry and Hydrology or downloaded (1pg, 222KB).

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Upcoming Internet Seminars | Upcoming Meetings | Archived Internet Seminars, Videos, and Courses

Upcoming Internet Seminars

  • Mining Remediation and Sustainability
    November 17, 2014 | 2:00PM-4:00PM EST
    More Information & Registration

    This webinar features three presentations delivered at the 2014 National Conference on Mining Influenced Waters (MIW). The session highlights EPA's efforts to identify lower-maintenance and innovative MIW treatment technologies, work being conducted by the International Network for Acid Prevention (INAP), and efforts undertaken by Barrick Gold Corporation to clean up and implement best industry practices at a mining-impacted river in the Dominican Republic.

    • EPA Report On Treatment Technologies For Mining-Influenced Water
      This presentation showcases information in a 2014 EPA reportAdobe PDF Logo on select MIW treatment technologies used or piloted as part of remediation efforts at mine sites. The report includes short descriptions of treatment technologies, information on the contaminants treated, pre-treatment requirements, long-term maintenance needs, performance, and costs. Technologies described are applicable to treatment of water from both coal and hardrock mine operations.

    • INAP: Partnering to Support Sustainable Mining
      This presentation will identify INAP and describe how this mining company network is partnering with other mining stakeholders to support sustainable mining. The presentation will include examples of how the Global Acid Rock Drainage (GARD) Guide (an international best practice guide for the prevention of acid-rock, neutral and saline drainage) has been applied in a multitude of climatic and geologic conditions, and will illustrate how INAP and its Global Alliance partners are building stakeholder capacity in developing regions.

    • Barrick Gold: Remediation and Sustainable Mining Efforts in the Dominican Republic
      Dramatic Improvements at Margajita River, Pueblo Viejo Gold Mine, Dominican Republic

      This presentation will describe Pueblo Viejo Dominicana and Barrick Gold Corporation's (operator) efforts to clean up the Margajita River and implement best industry practices at the Pueblo Viejo Gold Mine in the Dominican Republic, which was historically operated by a state-owned mining company. The presentation also will discuss impacts of the cleanup on local communities and Pueblo Viejo Dominicana Corporation's plans for the future of the site.
  • Water Treatment: Iron Mountain Mine and Bunker Hill Mining and Metallurgical Complex Superfund Sites
    December 17, 2014 | 1:00-3:00 EST
    More Information & Registration

    This webinar features three presentations on mining-influenced water (MIW) treatment delivered at the 2014 National Conference on Mining Influenced Waters. The session focuses on approaches to MIW treatment, operations and maintenance (O&M) challenges, and characterization and remediation of MIW treatment issues at two Superfund sites.

    • Iron Mountain Mine Superfund Site — Long Term O&M Challenges
      Nearly 100 years of mining at the Iron Mountain Mine Superfund Site in Shasta County, California resulted in extensive workings and fractured rock, creating pathways for air and water to oxidize the massive sulfide ore. This resulted in the development of MIW with pH as low as -3.6 and the release of tens of thousands of pounds of heavy metals per day into the surrounding drainages and water bodies, before remediation reduced metals loading by more than 97%. This presentation will discuss some of the long-term and unusual O&M issues at the site, which include mineral precipitate formation in MIW conveyance pipelines, accelerated deterioration of a urethane liner in an uncontaminated water diverter, loss of filtrate from a lined pit used to store high-density sludge, and deterioration of concrete ore chute plugs that are part of MIW collection systems.

    • Characterization and Remediation of Iron(III) Oxide-Rich Scale in a Pipeline Carrying Acid Mine Drainage at Iron Mountain Mine, California, U.S.A.
      A pipeline carrying acid mine drainage (AMD) to the treatment plant at the Iron Mountain Mine Superfund Site (California, U.S.A.) has developed substantial scaling over the past several years, resulting in spillage of AMD and requiring frequent and costly clean-out. This presentation will discuss some of the research being conducted by USGS at this site on these issues. The objectives of the work are to characterize the pipe scale composition, identify biogeochemical processes leading to its formation, and identify possible strategies to prevent or retard its formation in the pipeline.

    • Tackling AMD, Mining Impacted Groundwater, Private Mine Ownership in a Superfund Site that Spans the Panhandle
      Historic disposal practices at the Bunker Hill Mining and Metallurgical Complex Superfund Site led to the mining-related hazardous substances being dispersed in nearly every aspect of the environment. EPA and the Idaho Department of Environmental Quality has undertaken cleanup actions to address exposure to lead and other heavy metals, and excellent progress has been made from both aesthetic and risk reduction standpoints. However, significant loading of dissolved metals continues to occur and many more years of work are necessary to fully achieve the cleanup goals for human health and water quality standards. This presentation will provide a brief history of the site, including EPA ownership and management of the water treatment plant, provide an in-depth look at the 2MGD+ Acid Mine Drainage water quality (a groundwater collection system currently being designed), and discuss recent optimization study and value engineering exercises that were pursued to ensure the most cost effective remedial action.

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Upcoming Meetings

  • SETAC North America 35th Annual Meeting
    November 9-13, 2014 | Vancouver, BC, Canada

    The SETAC North America 35th Annual Meeting is a 5-day event featuring a variety of training, networking, and learning opportunities. More than 2,300 scientists, assessors, regulators, and managers will gather to share and discuss emerging research, regulatory developments, and the latest methodologies in environmental toxicology and chemistry. The meeting draws a diverse group of scientists from academia, business, and government representing more than 40 countries. The daily program consists of more than 1,800 presentations in 88 poster and platform sessions. Session tracks cover topics such as aquatic toxicology and ecology, integrated environmental assessment and management, linking science and social issues, environmental or analytical chemistry, regulatory directions, remediation and restoration, and terrestrial or wildlife toxicology and ecology. Special symposia will tackle emerging issues or regional topics of interest. Click here to register.

  • 10th ICARD & IMWA Annual Conference
    April 21-24, 2015 | Santiago, Chile

    The 10th International Conference on Acid Rock Drainage (ICARD) and the International Mine Water Association (IMWA) Annual Conference will be held as a single conference in Santiago, Chile in 2015. The conference will be a unique opportunity to gather the newly-formed local and South American acid drainage and mine water community. Conference themes include geomicrobiology; biogeochemical cycles and biomining; applied mineralogy and geoenvironmental units; prediction of drainage flow; prediction of drainage chemistry; mine water and drainage collection and treatment; dry covers; scaling from laboratory to field studies; reliable mine water operation; mine water management for closure; mine water geochemistry. Registration is open and can be completed at http://www.icard2015.com/english/registration.

  • 2015 Joint National Conference of ASMR and ARRI
    June 6-11, 2015 | Lexington, KY

    The 32nd Annual Meeting of American Society of Mining & Reclamation (AMSR) and the 9th Annual Meeting of the Appalachian Regional Reforestation Initiative (ARRI) will be held jointly from June 6 to 11, 2015. Stay tuned for more details. A call for abstracts has recently been issued for the conference with a December 1, 2014 submission deadine.

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Archived Internet Seminars, Videos, and Courses

 CLU-IN Mining Sites Webinar Series

 Workshops on Hardrock Mine Geochemistry and Hydrology

EPA's Region 10, ORD, and OSRTI hosted a three-part workshop series on hardrock mine geochemistry and hydrology. The goals included enhancing participants' understanding of the key issues regarding water chemistry predictions, identifying potential sources of contamination from mine sites, and describing practices to mitigate or reclaim facilities to protect natural resources. Presenters included experts from EPA Headquarters, Regions, and ORD; the U.S. Geological Survey; and the U.S. Forest Service. The workshops were open to all agencies, tribes, consultants, and the general public, and are now archived and available for streaming. Supplementary materials and resources provided by the instructors are also available for download below.

Workshop 1 - Evaluating Water Chemistry Predictions at Hardrock Mine Sites

   » Detailed presentation descriptions and full archive


Workshop 2 - Mining Influenced Waters - Pathways for Off-Site Releases

   » Detailed presentation descriptions and full archive

Workshop 3 - Sampling, Monitoring and Remediation at Mine Sites

   » Detailed presentation descriptions and full archive


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