CARPENTER SNOW CREEK MINING DISTRICT
NEIHART, MT
Cleanup Progress
On this page:
Cleaning up Superfund sites is a complex, multi-phase process. Learn more:Site Milestones
| Milestone | Date(s) |
|---|---|
| Initial Assessment Completed | 02/06/1996 |
| Proposed to the National Priorities List | 12/01/2000 |
| Finalized on the National Priorities List | 09/13/2001 |
| Remedial Investigation Started | 06/11/2003 |
| Remedy Selected | 04/06/2009 |
| Remedial Action Started | 04/23/2023 |
| Construction Completed | Not Yet Achieved |
| Deleted from National Priorities List | Not Yet Achieved |
| Most Recent Five-Year Review | Not Yet Achieved |
| Achieved Sitewide Ready for Anticipated Reuse | Not Yet Achieved |
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 | 02/03/2003 | 00 | |
| Consent Decree (EPA Performed) | OU 00 - SITEWIDE | 09/13/2019 | 00 | |
| Removal (EPA Performed) | OU 01 - TOWN OF NEIHART | 08/23/2004 | 10/05/2004 | 01 |
| Removal (EPA Performed) | OU 01 - TOWN OF NEIHART | 10/01/2019 | 02/20/2020 | 01 |
| Combined Remedial Investigation/Feasibility Study (EPA Performed) | OU 01 - TOWN OF NEIHART | 06/11/2003 | 04/06/2009 | 01 |
| Combined Remedial Investigation/Feasibility Study | OU 01 - TOWN OF NEIHART | Estimated Jun - Aug 2024 | Estimated Jun - Aug 2026 | 01 |
| Record of Decision (EPA Performed) | OU 01 - TOWN OF NEIHART | 04/06/2009 | 01 | |
| Remedial Design (EPA Performed) | OU 01 - TOWN OF NEIHART | 07/26/2007 | 01/11/2021 | 01 |
| Remedial Action (EPA Performed) | OU 01 - TOWN OF NEIHART | 04/23/2023 | 01 | |
| Removal (EPA Performed) | OU 02 - MINES AND WATERSHED | 09/12/2017 | 05/20/2019 | 02 |
| Removal (EPA Performed) | OU 02 - MINES AND WATERSHED | 09/13/2017 | 01/17/2018 | 02 |
| Combined Remedial Investigation/Feasibility Study (EPA Performed) | OU 02 - MINES AND WATERSHED | 09/07/2010 | 02 | |
| Combined Remedial Investigation/Feasibility Study (EPA Performed) | OU 02 - MINES AND WATERSHED | 05/28/2014 | 01/11/2021* | 02 |
| Remedial Design (EPA Performed) | OU 02 - MINES AND WATERSHED | 08/31/2015 | 01/11/2021* | 02 |
| Administrative Order of Consent (EPA Performed) | OU 03 - SILVER DYKE MINING COMPLEX | 07/06/2017 | 03 | |
| Removal (EPA Performed) | OU 03 - SILVER DYKE MINING COMPLEX | 09/03/2013 | 10/18/2014 | 03 |
| Removal (EPA Performed) | OU 03 - SILVER DYKE MINING COMPLEX | 09/11/2020 | 09/12/2021 | 03 |
| Removal (EPA Performed) | OU 03 - SILVER DYKE MINING COMPLEX | 09/11/2020 | 09/13/2021 | 03 |
| Removal (EPA Performed) | OU 03 - SILVER DYKE MINING COMPLEX | 07/11/2022 | 11/19/2022 | 03 |
| Removal (EPA Performed) | OU 03 - SILVER DYKE MINING COMPLEX | 05/12/2023 | Estimated Jun - Aug 2024 | 03 |
| Removal (EPA Performed) | OU 03 - SILVER DYKE MINING COMPLEX | 06/28/2023 | Estimated Sep - Nov 2024 | 03 |
| Combined Remedial Investigation/Feasibility Study (EPA Performed) | OU 03 - SILVER DYKE MINING COMPLEX | 07/16/2015 | 03 | |
| Combined Remedial Investigation/Feasibility Study | OU 04 - NEIHART SLOPE | Estimated Mar - May 2025 | 04 | |
| Combined Remedial Investigation/Feasibility Study | OU 05 - FLUVIAL DEPOSITS | Estimated Jun - Aug 2024 | 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.