BLACK BUTTE MINE
COTTAGE GROVE, OR
Health & Environment
On this page:
What Are the Risks at the Site?
Black Butte Mine is a significant contributor of mercury and other toxic metals to sediment and fish tissue in downstream waterbodies. Mercury and other toxic metals are present in mine tailings and mercury furnace wastes, soils, sediments and in the surface water. Significant transport of mercury and other toxic metals downstream occurs during periods of higher stream flow during and following rainfall events.
The greatest health risk to people is through ingesting or touching contaminants in soil, sediment, groundwater or surface water, or through ingestion of contaminated fish. In the short term, exposure pathways that could result in unacceptable risks are being controlled.
The Oregon Health Authority issued a fish advisory and completed a public health assessment for the site: Black Butte Mine Environmental Health Assessment
Black Butte Mine is a source of mercury, arsenic, and other toxic metals to sediment and fish tissue in downstream waterbodies. Mercury and other toxic metals are present in mine tailings and mercury furnace wastes, soils, sediments and in the surface water. Significant transport of mercury and other toxic metals downstream occurs during periods of higher stream flow during and following rainfall events.
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.
|Status at this
|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||Insufficient Data||
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.
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 may be eligible for additional redevelopment.