Sunday, February 19, 2017

Abandoned Mine Lands Investigation
and Restoration Services 

Agencies and environmental managers are faced with the growing challenge of dealing with active, abandoned, and inactive mining operations, which are impacting the land that they manage. CES has extensive experience in providing a variety of regulatory driven investigations including: Preliminary Assessments (PAs), Site Inspections (SIs), Engineering Evaluations/Cost Analysis (EECAs), Remedial Investigation/Feasibility Studies (RIFS), and Removal/ Remedial Design, Implementation, and Closure. CES is focused on providing the following services for abandoned mine lands:

Azurite Mine Tailings

Project Summary - Azurite Mine - CERCLA Removal Action Project

The Azurite Mine is an abandoned gold mine in a remote area in the North Cascades of Washington State. Since 2004, CES has been working for Region 6 of the Forest Service on this CERCLA project, including the Site Inspection, Reprocessing Study, Removal Design, and Removal Action implementation. The Removal Action began in July 2011 under a design-build contract structure with CES, and was completed at the end of September 2011. The repository was constructed on a 2.5:1 slope, and the liner consisted of a traditional HDPE liner and other geomembranes, along with a geogrid and a talus rock cover to blend in with the surrounding area. All borrow material was generated onsite because hauling material to the site was impractical. There will also be ongoing semi-annual inspections to monitor the constructed repository, revegetation, and to collect aquatic samples to assess the success of the Removal Action.