Superfund Information Systems: Site Profile

Superfund Site:

ROCKY FLATS PLANT (USDOE)
GOLDEN, CO

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 12/01/1985
Proposed to the National Priorities List 10/15/1984
Finalized on the National Priorities List 10/04/1989
Remedy Selected 09/29/1994
Final Remedy Selected 09/29/2006
Remedial Action Started 01/15/1990
Construction Completed 09/29/2006
Deleted from National Priorities List Not Yet Achieved
Most Recent Five-Year Review 08/02/2017
Site Ready for Reuse and Redevelopment 04/02/2007

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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
Five-Year Review OU 00 - SITEWIDE 07/30/2012 00
Five-Year Review OU 00 - SITEWIDE 08/02/2017 00
Five-Year Review OU 00 - SITEWIDE 09/14/2007 00
Five-Year Review OU 00 - SITEWIDE 09/26/2002 00
Partial NPL Deletion OU 00 - SITEWIDE 05/25/2007 00
Removal OU 01 - CENTRAL OU 01/01/1998 09/30/1998 01
Removal OU 01 - CENTRAL OU 01/11/1999 06/18/2004 01
Removal OU 01 - CENTRAL OU 01/11/1999 10/30/2004 01
Removal OU 01 - CENTRAL OU 01/17/1996 04/15/1996 01
Removal OU 01 - CENTRAL OU 01/18/2001 02/28/2005 01
Removal OU 01 - CENTRAL OU 02/06/1998 01/03/2000 01
Removal OU 01 - CENTRAL OU 02/14/2005 02/25/2005 01
Removal OU 01 - CENTRAL OU 03/29/2001 08/12/2005 01
Removal OU 01 - CENTRAL OU 04/25/1996 09/23/1996 01
Removal OU 01 - CENTRAL OU 08/07/1997 06/04/1998 01
Removal OU 01 - CENTRAL OU 10/01/1999 03/14/2001 01
Removal OU 01 - CENTRAL OU 10/01/1999 04/01/2000 01
Removal OU 01 - CENTRAL OU 10/01/1999 06/16/2000 01
Removal OU 01 - CENTRAL OU 10/01/1999 09/14/2000 01
Removal OU 01 - CENTRAL OU 10/01/1999 09/22/2000 01
Removal OU 01 - CENTRAL OU 10/01/2000 09/28/2001 01
Removal OU 01 - CENTRAL OU 10/01/2001 09/20/2002 01
Removal OU 01 - CENTRAL OU 10/20/1995 08/16/1996 01
Removal OU 01 - CENTRAL OU 10/30/1998 06/23/1999 01
Removal OU 01 - CENTRAL OU 11/01/1996 09/30/1997 01
Removal OU 01 - CENTRAL OU 11/05/1999 06/27/2005 01
Remedial Investigation OU 01 - CENTRAL OU 02/06/1990 06/01/1994 01
Remedial Investigation OU 01 - CENTRAL OU 04/05/1991 04/01/1996 01
Remedial Investigation OU 01 - CENTRAL OU 05/27/1992 09/20/1995 01
Remedial Investigation OU 01 - CENTRAL OU 06/08/1990 09/29/1995 01
Remedial Investigation OU 01 - CENTRAL OU 07/30/1986 12/31/1987 01
Remedial Investigation OU 01 - CENTRAL OU 07/31/1986 07/01/1987 01
Remedial Investigation OU 01 - CENTRAL OU 08/13/1987 03/01/1988 01
Remedial Investigation OU 01 - CENTRAL OU 09/24/1991 10/31/1994 01
Feasibility Study OU 01 - CENTRAL OU 02/06/1990 02/01/1995 01
Feasibility Study OU 01 - CENTRAL OU 08/13/1987 03/01/1988 01
Feasibility Study OU 01 - CENTRAL OU 10/01/1994 09/29/1995 01
Record of Decision OU 01 - CENTRAL OU 03/12/1997 01
Record of Decision OU 01 - CENTRAL OU 09/13/1995 01
Record of Decision OU 01 - CENTRAL OU 09/29/1994 01
Record of Decision OU 01 - CENTRAL OU 09/29/1995 01
Record of Decision OU 01 - CENTRAL OU 09/29/2006 01
Record of Decision Amendment OU 01 - CENTRAL OU 09/19/2011 01
Remedial Design OU 01 - CENTRAL OU 01/15/1990 02/22/1991 01
Remedial Action OU 01 - CENTRAL OU 01/15/1990 09/30/1992 01
Remedial Action OU 01 - CENTRAL OU 05/13/2005 04/24/2006 01
Remedial Action OU 01 - CENTRAL OU 09/16/2004 05/15/2006 01
Removal OU 02 - PERIPHERAL 02/04/1999 09/23/1999 02
Removal OU 02 - PERIPHERAL 03/21/1997 09/30/1997 02
Removal OU 02 - PERIPHERAL 06/03/1996 09/20/1996 02
Removal OU 02 - PERIPHERAL 07/13/1999 09/22/1999 02
Removal OU 02 - PERIPHERAL 07/17/1998 09/30/1998 02
Removal OU 02 - PERIPHERAL 07/23/1997 01/31/1999 02
Removal OU 02 - PERIPHERAL 10/09/2002 12/04/2003 02
Remedial Investigation OU 03 - OFFSITE AREAS 07/10/1991 06/03/1997 03
Record of Decision OU 03 - OFFSITE AREAS 06/03/1997 03

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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