Superfund Information Systems: Site Profile

Superfund Site:

MIDNITE MINE
WELLPINIT, WA

Cleanup Progress

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

Site-Wide Milestones

Milestone Date(s)
Preliminary Assessment/Site Investigation Completed 12/28/1988
Proposed to the National Priorities List 02/16/1999
Finalized on the National Priorities List 05/11/2000
Final Remedy Selected 09/29/2006
Remedial Action Started 11/26/2008
Construction Completed Not Yet Achieved
Deleted from National Priorities List Not Yet Achieved
Most Recent Five-Year Review 04/18/2014
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
Five-Year Review OU 00 - SITEWIDE 04/18/2014 00
Removal OU 01 - REMEDIAL 08/30/2004 03/24/2005 01
Combined Remedial Investigation/Feasibility Study OU 01 - REMEDIAL 09/28/1998 09/29/2006 01
Record of Decision OU 01 - REMEDIAL 09/29/2006 01
Remedial Design OU 01 - REMEDIAL 08/24/2011 11/02/2015 01
Remedial Design OU 01 - REMEDIAL 11/26/2008 08/24/2011 01
Remedial Action OU 01 - REMEDIAL 11/02/2015 01
Remedial Action OU 01 - REMEDIAL 11/26/2008 01

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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