Superfund Information Systems: Site Profile

Superfund Site:

GILT EDGE MINE
LEAD, SD

Cleanup Progress

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

Site Milestones

Milestone Date(s)
Initial Assessment Completed 09/29/2000
Proposed to the National Priorities List 05/11/2000
Finalized on the National Priorities List 12/01/2000
Remedial Investigation Started 09/27/1999
Remedy Selected 04/23/2001
Remedial Action Started 07/17/2001
Construction Completed Not Yet Achieved
Deleted from National Priorities List Not Yet Achieved
Most Recent Five-Year Review 06/20/2017
Site Ready for Reuse and Redevelopment Not Yet Achieved

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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
Consent Decree (EPA Performed) OU 00 - SITEWIDE 02/08/2010 00
Consent Decree (EPA Performed) OU 00 - SITEWIDE 09/27/2010 00
Consent Decree (EPA Performed) OU 00 - SITEWIDE 10/10/2012 00
Consent Decree (EPA Performed) OU 00 - SITEWIDE 09/19/2016 00
Removal (EPA Performed) OU 00 - SITEWIDE 09/01/2000 12/11/2001 00
Removal (EPA Performed) OU 00 - SITEWIDE 08/19/2002 02/19/2003 00
Five-Year Review (EPA Performed) OU 00 - SITEWIDE 04/10/2007 00
Five-Year Review (EPA Performed) OU 00 - SITEWIDE 06/21/2012 00
Five-Year Review (EPA Performed) OU 00 - SITEWIDE 06/20/2017 00
Combined Remedial Investigation/Feasibility Study (EPA Performed) OU 01 - SURFACE 09/27/1999 09/29/2008 01
Record of Decision (EPA Performed) OU 01 - SURFACE 09/29/2008 01
Explanation of Significant Differences (EPA Performed) OU 01 - SURFACE 09/30/2014 01
Remedial Design (EPA Performed) OU 01 - SURFACE 12/15/2008 09/26/2014 01
Remedial Action (EPA Performed) OU 01 - SURFACE 02/10/2015 01
Administrative Order of Consent (EPA Performed) OU 02 - WATER TREATMENT 02/09/2018 02
Combined Remedial Investigation/Feasibility Study (EPA Performed) OU 02 - WATER TREATMENT 09/25/2000 11/30/2001 02
Combined Remedial Investigation/Feasibility Study (EPA Performed) OU 02 - WATER TREATMENT 04/26/2012 02
Combined Remedial Investigation/Feasibility Study (PRP Performed, EPA Oversight) OU 02 - WATER TREATMENT 02/09/2018 02
Record of Decision (EPA Performed) OU 02 - WATER TREATMENT 04/23/2001 02
Record of Decision (EPA Performed) OU 02 - WATER TREATMENT 11/30/2001 02
Remedial Design (EPA Performed) OU 02 - WATER TREATMENT 01/30/2002 08/27/2004 02
Remedial Design (EPA Performed) OU 02 - WATER TREATMENT 09/16/2009 03/31/2010 02
Remedial Action (EPA Performed) OU 02 - WATER TREATMENT 07/17/2001 10/17/2002* 02
Remedial Action (EPA Performed) OU 02 - WATER TREATMENT 04/18/2002 02
Long-Term Response Action (State Performed) OU 02 - WATER TREATMENT 05/30/2002 05/30/2002 02
Combined Remedial Investigation/Feasibility Study (EPA Performed) OU 03 - RUBY DUMP/CAP CLOSURE 09/25/2000 08/30/2001 03
Record of Decision (EPA Performed) OU 03 - RUBY DUMP/CAP CLOSURE 08/30/2001 03
Remedial Design (EPA Performed) OU 03 - RUBY DUMP/CAP CLOSURE 09/24/2001 03/27/2002 03
Remedial Action (EPA Performed) OU 03 - RUBY DUMP/CAP CLOSURE 09/24/2001 06/30/2002* 03
Remedial Action (EPA Performed) OU 03 - RUBY DUMP/CAP CLOSURE 04/11/2003* 08/23/2012 03
Long-Term Response Action (EPA Performed) OU 03 - RUBY DUMP/CAP CLOSURE 02/20/2004 09/21/2006 03

*NOTE: This date may not reflect the actual start or actual completion of the milestone. Either the lead for this activity changed, the project was phased, or the project did not fit the normal definitions of activities tracked in this table.

NOTE: Dates and estimated dates will not display for all milestones. Estimated dates only display for milestones planned within the next three fiscal years. Estimated dates and start dates will not display for the following enforcement milestones: Administrative Order of Consent, Consent Decree and Unilateral Administrative Order. Start dates will not display for the following document milestones: Five-Year Review, Record of Decision, Record of Decision Amendment, Explanation of Significant Differences and Partial NPL Deletion.

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.

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