Anaconda - What’s happening at the Site?

Below is a brief overview of what is currently planned to happen at the Anaconda Copper Mine Site (ACMS) over the next three months. Following that, are highlights of what has been accomplished at the site over the past three months.

If you would like to see additional information added to this page or have any other suggestions, please email the NDEP ACMS team at acms[at]ndep.nv.gov.

This page is updated quarterly, or more often for specific accomplishments or activities. This page was last updated: September 22, 2021.

What will be happening in the next three months:

September:

09/15: ARC submitted to NDEP the Final OU-7 HHRA-SLERA Report. The Final Report contains the results of human health and ecological risk characterizations associated with this OU. ARC is required to address the comments and direction before the Final OU-7 HHRA/SLERA will be approved.

October:

ARC is scheduled to submit the Draft OU-1 (Site-Wide Groundwater) HHRA Report. This draft report will contain the results of human health and ecological risk characterizations associated with this OU. This is a major deliverable that requires a 45-day stakeholder review and comment period.

ARC is scheduled to submit the Draft OU-2 (Yerington Mine Pit Lake) SLERA Report. This draft report will contain the results of potential human health and ecological risk characterizations associated with this OU. This is a major deliverable that requires a 45-day stakeholder review and comment period.

November:

ARC is scheduled to submit the Draft Combined OU-4b, 5, and 6 HHRA/SLERA Report. This draft report will contain the results of potential human health and ecological risk characterizations associated with this OU. This is a major deliverable that requires a 45-day stakeholder review and comment period.

September – November:

There will be ongoing construction at the ACMS associated with regrading and capping of the OU-8 Arimetco Heap Leach Pads (HLPs) in accordance with the ROD 1/1A remedy.

What was accomplished in the previous three months:

August:

08/05: ARC submitted a Final OU-2 Pit Lake Surface Water Construction Screening Assessment. This document was not on the official schedule of deliverables for technical review. ARC determined that it was necessary to secure a reliable, alternate source of water for construction dust control and other ancillary construction purposes. The document submitted by ARC was not intended to duplicate or supersede the upcoming draft OU-2 SLERA for the Yerington Pit Lake. While not an official deliverable, NDEP made the OU-2 surface water screening assessment document available for stakeholder review and comment. The document was approved for posting on the Anaconda SharePoint site on August 6, 2021, with the comment period ending September 7, 2021.

June – July:

There were no major document deliverables submitted during June and July 2021. In June 2021, construction activities associated with the Arimetco OU-8 Heap Leach Pads (HLPs) regrading and capping project was initiated.

ACMS Schedule 

Chart depicting the Anaconda 12-Year Closure Schedule
Click on schedule to enlarge

 

Map of Closure Phases

Map of Closure Phases

 

Closure Schedule

 

 

Closure Schedule

 

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