Superfund Information Systems: Site Profile

Superfund Site:

ANACONDA CO. SMELTER
ANACONDA, MT

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 08/01/1982
Proposed to the National Priorities List 12/30/1982
Finalized on the National Priorities List 09/08/1983
Remedial Investigation Started 07/01/1986
Remedy Selected 10/02/1987
Remedial Action Started 01/07/1988
Final Remedial Action Started 07/07/2016
Construction Completed Not Yet Achieved
Deleted from National Priorities List Not Yet Achieved
Most Recent Five-Year Review 09/25/2015
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
Administrative Order of Consent (EPA Performed) OU 00 - SITEWIDE 04/12/1984 00
Administrative Order of Consent (EPA Performed) OU 00 - SITEWIDE 10/22/1984 00
Administrative Order of Consent (EPA Performed) OU 00 - SITEWIDE 12/20/1985 00
Administrative Order of Consent (EPA Performed) OU 00 - SITEWIDE 06/09/1986 00
Administrative Order of Consent (EPA Performed) OU 00 - SITEWIDE 07/01/1986 00
Administrative Order of Consent (EPA Performed) OU 00 - SITEWIDE 07/29/1987 00
Administrative Order of Consent (EPA Performed) OU 00 - SITEWIDE 09/28/1988 00
Administrative Order of Consent (EPA Performed) OU 00 - SITEWIDE 09/20/1991 00
Administrative Order of Consent (EPA Performed) OU 00 - SITEWIDE 04/02/1992 00
Administrative Order of Consent (EPA Performed) OU 00 - SITEWIDE 07/08/1992 00
Administrative Order of Consent (EPA Performed) OU 00 - SITEWIDE 04/29/1994 00
Administrative Order of Consent (EPA Performed) OU 00 - SITEWIDE 01/13/1996 00
Consent Decree (EPA Performed) OU 00 - SITEWIDE 09/14/1988 00
Consent Decree (EPA Performed) OU 00 - SITEWIDE 12/10/1992 00
Consent Decree (EPA Performed) OU 00 - SITEWIDE 01/13/1997 00
Consent Decree (EPA Performed) OU 00 - SITEWIDE 01/24/2005 00
Consent Decree (EPA Performed) OU 00 - SITEWIDE 09/11/2013 00
Unilateral Administrative Order (EPA Performed) OU 00 - SITEWIDE 04/07/1994 00
Unilateral Administrative Order (EPA Performed) OU 00 - SITEWIDE 12/11/2000 00
Removal (EPA Performed) OU 00 - SITEWIDE 07/15/1986 09/13/1988 00
Removal (PRP Performed, EPA Oversight) OU 00 - SITEWIDE 09/23/1991 06/03/1994 00
Five-Year Review (EPA Performed) OU 00 - SITEWIDE 11/23/1994 00
Five-Year Review (EPA Performed) OU 00 - SITEWIDE 12/30/1999 00
Five-Year Review (EPA Performed) OU 00 - SITEWIDE 09/29/2005 00
Five-Year Review (EPA Performed) OU 00 - SITEWIDE 09/30/2010 00
Five-Year Review (EPA Performed) OU 00 - SITEWIDE 09/25/2015 00
Five-Year Review OU 00 - SITEWIDE Estimated Sep - Nov 2020 00
Unilateral Administrative Order (EPA Performed) OU 04 - WATER, WASTE AND SOILS 06/07/2002 04
Unilateral Administrative Order (EPA Performed) OU 04 - WATER, WASTE AND SOILS 09/09/2002 04
Unilateral Administrative Order (EPA Performed) OU 04 - WATER, WASTE AND SOILS 09/29/2003 04
Unilateral Administrative Order (EPA Performed) OU 04 - WATER, WASTE AND SOILS 10/20/2003 04
Unilateral Administrative Order (EPA Performed) OU 04 - WATER, WASTE AND SOILS 08/05/2005 04
Unilateral Administrative Order (EPA Performed) OU 04 - WATER, WASTE AND SOILS 06/05/2007 04
Unilateral Administrative Order (EPA Performed) OU 04 - WATER, WASTE AND SOILS 09/22/2008 04
Unilateral Administrative Order (EPA Performed) OU 04 - WATER, WASTE AND SOILS 09/09/2010 04
Unilateral Administrative Order (EPA Performed) OU 04 - WATER, WASTE AND SOILS 06/02/2011 04
Unilateral Administrative Order (EPA Performed) OU 04 - WATER, WASTE AND SOILS 09/25/2015 04
Unilateral Administrative Order (EPA Performed) OU 04 - WATER, WASTE AND SOILS 06/17/2016 04
Removal (EPA Performed) OU 04 - WATER, WASTE AND SOILS 03/31/1999 04/28/1999 04
Combined Remedial Investigation/Feasibility Study (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 09/30/1994 07/30/1996* 04
Combined Remedial Investigation/Feasibility Study (EPA Performed) OU 04 - WATER, WASTE AND SOILS 07/30/1996* 09/29/1998 04
Record of Decision (EPA Performed) OU 04 - WATER, WASTE AND SOILS 09/29/1998 04
Record of Decision Amendment (EPA Performed) OU 04 - WATER, WASTE AND SOILS 09/29/2011 04
Record of Decision Amendment OU 04 - WATER, WASTE AND SOILS Estimated Dec 2019 - Feb 2020 04
Remedial Design (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 09/30/1999 09/29/2000 04
Remedial Design (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 06/29/2000 03/11/2008 04
Remedial Design (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 06/29/2000 05/15/2003 04
Remedial Design (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 06/29/2000 05/29/2002 04
Remedial Design (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 06/29/2000 07/24/2008 04
Remedial Design (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 06/29/2000 08/09/2002 04
Remedial Design (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 06/29/2000 09/29/2000 04
Remedial Design (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 06/29/2000 10/12/2007 04
Remedial Design (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 06/29/2000 12/19/2007 04
Remedial Design (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 06/30/2000 06/15/2005 04
Remedial Design (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 06/30/2000 09/11/2003 04
Remedial Design (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 06/30/2000 10/01/2014 04
Remedial Design (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 06/30/2000 10/15/2003 04
Remedial Action (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 12/20/2000 09/24/2003 04
Remedial Action (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 12/20/2000 09/29/2005 04
Remedial Action (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 07/12/2002 09/27/2006 04
Remedial Action (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 09/27/2002 09/27/2006 04
Remedial Action (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 09/27/2002 09/29/2005 04
Remedial Action (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 05/15/2003 09/27/2006 04
Remedial Action (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 09/30/2003 04
Remedial Action (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 11/06/2003 09/29/2004 04
Remedial Action (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 08/26/2005 09/25/2008 04
Remedial Action (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 06/28/2007 09/30/2013 04
Remedial Action (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 08/21/2008 04
Remedial Action (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 09/30/2008 09/22/2015 04
Remedial Action (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 09/28/2010 09/22/2015 04
Remedial Action (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 09/28/2010 09/30/2013 04
Remedial Action (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 07/29/2011 09/18/2014 04
Remedial Action (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 11/17/2015 Estimated Jun - Aug 2020 04
Remedial Action (PRP Performed, EPA Oversight) OU 04 - WATER, WASTE AND SOILS 07/07/2016 04
Removal (PRP Performed, EPA Oversight) OU 07 - OLD WORKS/EAST ANACONDA 04/02/1992 11/04/1992 07
Combined Remedial Investigation/Feasibility Study (PRP Performed, EPA Oversight) OU 07 - OLD WORKS/EAST ANACONDA 09/28/1992 03/08/1994 07
Record of Decision (EPA Performed) OU 07 - OLD WORKS/EAST ANACONDA 03/08/1994 07
Explanation of Significant Differences (EPA Performed) OU 07 - OLD WORKS/EAST ANACONDA 11/06/1995 07
Remedial Design (PRP Performed, EPA Oversight) OU 07 - OLD WORKS/EAST ANACONDA 04/07/1994 10/29/2004 07
Remedial Design (PRP Performed, EPA Oversight) OU 07 - OLD WORKS/EAST ANACONDA 05/03/1994 05/19/1994 07
Remedial Design (PRP Performed, EPA Oversight) OU 07 - OLD WORKS/EAST ANACONDA 05/03/1994 09/29/2000 07
Remedial Action (PRP Performed, EPA Oversight) OU 07 - OLD WORKS/EAST ANACONDA 05/19/1994 06/29/2000 07
Remedial Action (PRP Performed, EPA Oversight) OU 07 - OLD WORKS/EAST ANACONDA 05/19/1994 09/28/2001 07
Remedial Action (PRP Performed, EPA Oversight) OU 07 - OLD WORKS/EAST ANACONDA 09/29/2000 09/18/2014 07
Remedial Action (PRP Performed, EPA Oversight) OU 07 - OLD WORKS/EAST ANACONDA 10/29/2004 09/29/2005 07
Remedial Action (EPA Performed) OU 07 - OLD WORKS/EAST ANACONDA 04/02/2009 01/28/2010 07
Operation and Maintenance (PRP Performed, EPA Oversight) OU 07 - OLD WORKS/EAST ANACONDA 09/18/2014 07
Removal (PRP Performed, EPA Oversight) OU 09 - BERYLLIUM REMOVAL 07/08/1992 09/30/1996 09
Combined Remedial Investigation/Feasibility Study (EPA Performed) OU 11 - FLUE DUST 07/06/1988 09/28/1988* 11
Record of Decision (EPA Performed) OU 11 - FLUE DUST 09/23/1991 11
Remedial Design (PRP Performed, EPA Oversight) OU 11 - FLUE DUST 02/19/1992 06/10/1993 11
Remedial Action (PRP Performed, EPA Oversight) OU 11 - FLUE DUST 06/10/1993 09/30/1996 11
Operation and Maintenance (PRP Performed, EPA Oversight) OU 11 - FLUE DUST 09/30/1996 Estimated Dec 2019 - Feb 2020 11
Partial NPL Deletion OU 11 - FLUE DUST Estimated Sep - Nov 2019 11
Removal (PRP Performed, EPA Oversight) OU 12 - ARBITER REMOVAL 07/08/1992 09/30/1996 12
Combined Remedial Investigation/Feasibility Study (EPA Performed) OU 14 - SMELTER HILL 07/06/1988 09/28/1988* 14
Combined Remedial Investigation/Feasibility Study (PRP Performed, EPA Oversight) OU 15 - MILL CREEK 07/01/1986 10/02/1987 15
Record of Decision (EPA Performed) OU 15 - MILL CREEK 10/02/1987 15
Record of Decision Amendment (EPA Performed) OU 15 - MILL CREEK 01/06/1988 15
Remedial Design (PRP Performed, EPA Oversight) OU 15 - MILL CREEK 01/07/1988 01/07/1988 15
Remedial Action (PRP Performed, EPA Oversight) OU 15 - MILL CREEK 01/07/1988 12/01/1988 15
Partial NPL Deletion OU 15 - MILL CREEK Estimated Sep - Nov 2019 15
Unilateral Administrative Order (EPA Performed) OU 16 - COMMUNITY SOILS 08/14/2002 16
Unilateral Administrative Order (EPA Performed) OU 16 - COMMUNITY SOILS 09/29/2003 16
Unilateral Administrative Order (EPA Performed) OU 16 - COMMUNITY SOILS 09/24/2015 16
Combined Remedial Investigation/Feasibility Study (PRP Performed, EPA Oversight) OU 16 - COMMUNITY SOILS 09/30/1994 09/30/1996 16
Record of Decision (EPA Performed) OU 16 - COMMUNITY SOILS 09/30/1996 16
Record of Decision Amendment (EPA Performed) OU 16 - COMMUNITY SOILS 09/30/2013 16
Explanation of Significant Differences (EPA Performed) OU 16 - COMMUNITY SOILS 06/19/2017 16
Remedial Design (PRP Performed, EPA Oversight) OU 16 - COMMUNITY SOILS 09/19/1997 08/02/2002 16
Remedial Design (PRP Performed, EPA Oversight) OU 16 - COMMUNITY SOILS 09/19/1997 10/31/2005 16
Remedial Design (PRP Performed, EPA Oversight) OU 16 - COMMUNITY SOILS 06/30/2000 09/24/2003 16
Remedial Design (PRP Performed, EPA Oversight) OU 16 - COMMUNITY SOILS 10/01/2014 08/31/2015 16
Remedial Action (PRP Performed, EPA Oversight) OU 16 - COMMUNITY SOILS 09/27/2002 09/22/2015 16
Remedial Action (PRP Performed, EPA Oversight) OU 16 - COMMUNITY SOILS 09/30/2003 09/30/2013 16
Remedial Action (PRP Performed, EPA Oversight) OU 16 - COMMUNITY SOILS 05/12/2006 09/22/2015 16
Remedial Action (EPA Performed) OU 16 - COMMUNITY SOILS 03/09/2011 07/03/2012 16
Remedial Action (PRP Performed, EPA Oversight) OU 16 - COMMUNITY SOILS 11/17/2015 16

*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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