Superfund Information Systems: Site Profile

Superfund Site:

BONITA PEAK MINING DISTRICT
UNINCORPORATED, CO

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 03/26/1998
Proposed to the National Priorities List 04/07/2016
Finalized on the National Priorities List 09/09/2016
Remedial Investigation Started 05/19/2016
Remedy Selected 05/20/2019
Remedial Action Started 09/20/2019
Construction Completed Not Yet Achieved
Deleted from National Priorities List Not Yet Achieved
Most Recent Five-Year Review Not Yet Achieved
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 09/13/2019 00
Removal (EPA Performed) OU 00 - SITEWIDE 01/12/2017 00
Removal (EPA Performed) OU 00 - SITEWIDE 07/16/2017 Estimated Jun - Aug 2021 00
Combined Remedial Investigation/Feasibility Study (EPA Performed) OU 01 - OU1 SITEWIDE - REMEDIAL 05/19/2016 01
Combined Remedial Investigation/Feasibility Study (EPA Performed) OU 01 - OU1 SITEWIDE - REMEDIAL 09/20/2019 Estimated Dec 2020 - Feb 2021 01
Record of Decision (EPA Performed) OU 01 - OU1 SITEWIDE - REMEDIAL 05/20/2019 01
Record of Decision OU 01 - OU1 SITEWIDE - REMEDIAL Estimated Dec 2020 - Feb 2021 01
Remedial Design (EPA Performed) OU 01 - OU1 SITEWIDE - REMEDIAL 06/01/2020 Estimated Jun - Aug 2021 01
Remedial Action (EPA Performed) OU 01 - OU1 SITEWIDE - REMEDIAL 09/20/2019 01
Remedial Action OU 01 - OU1 SITEWIDE - REMEDIAL Estimated Dec 2020 - Feb 2021 01
Administrative Order of Consent (EPA Performed) OU 02 - OU2 MAYFLOWER 05/10/2017 02
Remedial Investigation (PRP Performed, EPA Oversight) OU 02 - OU2 MAYFLOWER 05/10/2017 02
Unilateral Administrative Order (EPA Performed) OU 03 - OU3 BONITA PEAK GROUNDWATER SYSTEM 03/15/2018 03
Remedial Investigation (PRP Performed, EPA Oversight) OU 03 - OU3 BONITA PEAK GROUNDWATER SYSTEM 04/11/2018 07/26/2019* 03
Remedial Investigation (EPA Performed) OU 03 - OU3 BONITA PEAK GROUNDWATER SYSTEM 07/26/2019* 03
Combined Remedial Investigation/Feasibility Study (EPA Performed) OU 03 - OU3 BONITA PEAK GROUNDWATER SYSTEM 04/09/2019 Estimated Sep - Nov 2020 03
Administrative Order of Consent (EPA Performed) OU 04 - OU4 BEN FRANKLIN MINE 08/15/2019 04
Removal (PRP Performed, EPA Oversight) OU 04 - OU4 BEN FRANKLIN MINE 09/14/2019 Estimated Mar - May 2021 04
Removal OU 05 - OU5 LONDON MINE Estimated Sep - Nov 2020 Estimated Sep - Nov 2021 05

*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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