Superfund Information Systems: Site Profile

Superfund Site:

BASIN MINING AREA
BASIN, MT

Cleanup Progress

On this page:

Cleaning up Superfund sites is a complex, multi-phase process. Learn more:

Site-Wide Milestones

Milestone Date(s)
Preliminary Assessment/Site Investigation Completed 11/10/1989
Proposed to the National Priorities List 07/22/1999
Finalized on the National Priorities List 10/22/1999
Remedy Selected 03/30/2001
Remedial Action Started 06/24/2002
Construction Completed Not Yet Achieved
Deleted from National Priorities List Not Yet Achieved
Most Recent Five-Year Review 09/22/2018
Site Ready for Reuse and Redevelopment Not Yet Achieved

Top of Page


Cleanup Schedule by Operable Unit

During cleanup, a site can be divided into a number of distinct areas depending on its complexity. These areas, called operable units (OUs), may address geographic areas, specific problems, or areas where a specific action is required. Examples of typical operable units include construction of a groundwater pump and treatment system or construction of a cap over a landfill.

Milestone OU Start Date Completion Date OU ID
Five-Year Review OU 00 - SITEWIDE 05/28/2008 00
Five-Year Review OU 00 - SITEWIDE 06/27/2013 00
Five-Year Review OU 00 - SITEWIDE 09/22/2018 00
Removal OU 01 - TOWN OF BASIN 05/29/2000 10/12/2006 01
Removal OU 01 - TOWN OF BASIN 07/27/2001 11/13/2001 01
Combined Remedial Investigation/Feasibility Study OU 01 - TOWN OF BASIN 09/28/1999 03/30/2001 01
Record of Decision OU 01 - TOWN OF BASIN 03/30/2001 01
Remedial Design OU 01 - TOWN OF BASIN 01/29/2001 09/28/2001 01
Remedial Action OU 01 - TOWN OF BASIN 06/24/2002 12/16/2004 01
Combined Remedial Investigation/Feasibility Study OU 02 - BASIN WATERSHED 09/28/1999 02
Removal OU 03 - LUTTRELL REPOSITORY 06/21/2000 10/12/2006 03
Removal OU 04 - BUCKEYE/ENTERPRISE MINES 05/29/2000 10/12/2006 04
Removal OU 05 - CRYSTAL MINE 06/20/2002 10/12/2006 05
Removal OU 05 - CRYSTAL MINE 08/11/2014 09/15/2014 05
Combined Remedial Investigation/Feasibility Study OU 05 - CRYSTAL MINE 05/27/2010 04/24/2015 05
Record of Decision OU 05 - CRYSTAL MINE 04/24/2015 05
Remedial Design OU 05 - CRYSTAL MINE 09/27/2014 11/09/2016 05
Removal OU 06 - BULLION MINE 05/15/2001 10/12/2006 06
Removal OU 06 - BULLION MINE 09/11/2014 11/15/2015 06
Combined Remedial Investigation/Feasibility Study OU 06 - BULLION MINE 06/24/2010 04/24/2015 06
Record of Decision OU 06 - BULLION MINE 04/24/2015 06
Remedial Design OU 06 - BULLION MINE 09/27/2014 11/09/2016 06

DISCLAIMER: The data on this page are derived from the Superfund Enterprise Management System and are solely for informational purposes. The data cannot be relied upon to create any substantive or procedural rights or requirements enforceable by any party in litigation with any member of the public, states, tribes, the United States or any federal agency. EPA reserves the right to change these data at any time without public notice.

Top of Page