Performance Measures
EPA uses performance measures to track environmental results at Superfund sites. If you have any questions or concerns about the measures at this site, please contact the site team members listed under Site Contacts.
Read more about Superfund Remedial Performance Measures.
| Performance Measure |
Status at this Superfund Site |
What does this mean? |
|---|---|---|
| Human Exposure Under Control | No | Yes means assessments indicate that across the entire site:
No means an unsafe level of contamination has been detected at the site and a reasonable expectation exists that people could be exposed. Insufficient data means that, due to uncertainty regarding exposures, one cannot draw conclusions as to whether human exposures are controlled, typically because:
|
| Groundwater Migration Under Control | Yes |
Yes means EPA reviewed all information on known and reasonably expected groundwater contamination. EPA concluded the migration of contaminated groundwater is stabilized and there is no unacceptable discharge to surface water. EPA will conduct monitoring to confirm that affected groundwater remains in the original area of contamination. No means EPA has reviewed all information on known and reasonably expected groundwater contamination, and the migration of contaminated groundwater is not stabilized. Insufficient data means that due to uncertainty regarding contaminated groundwater migration, EPA cannot draw conclusions as to whether the migration of contaminated groundwater is stabilized. |
| Construction Complete | No |
Yes means the physical construction of the cleanup is complete for the entire site. No means either physical construction is not complete or actions are still needed to address contamination. |
| Sitewide Ready for Anticipated Use | No | Yes means:
No means that one or more of these three criteria have not been met. However, a site listed as no may still have redevelopment occurring on portions of the site and additional redevelopment may be possible. Important Note: Sitewide Ready for Anticipated Use (SWRAU) is an internal performance measure and is not a reporting of site-specific risk. The determination that a site is SWRAU is based on the information available at the time the determination is made. That determination may revert if site conditions change, or if new or additional information is discovered regarding the contamination at the site. |
*As of September 2022, the Silver Bow CreekButte Area Superfund Site is considered "Current Human Exposure Not Under Control." This large Site includes approximately 26 miles of stream and streamside habitat, the urban centers of Butte and Walkerville, rural areas outside of Butte, the Berkeley Pit and the underground mine workings of the historic Butte Mining District, and the treatment settling lagoons at the Warm Springs Ponds. The main contaminants of concern are heavy metals and arsenic. The remedial design and remedial action consent decree was recently finalized for the Butte Priority Soils Operable Unit 8 to address this high priority area. EPA started a Remedial Investigation for the West Side Soils Operable Unit 13 in June of 2018 and is currently drafting the Remedial Investigation Report and the supporting documents of the Feasibility Study Report. EPA has an extensive community outreach program which includes providing the community with information on how to reduce exposures to potentially contaminated sources.