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Formosa Mine: Douglas County, Oregon
The Formosa Mine Superfund Site is located on Silver Butte, about 10 miles south of the town of Riddle, in Douglas County,Oregon. The site was added to the National Priorities List (NPL) in 2007.
The acid rock drainage flowing from the mine has severely degraded 13 miles of Middle Creek and the South Fork of Middle Creek, affecting macroinvertebrates, resident fish, coastal steelhead trout, and Oregon coastal coho salmon. EPA is completing complete a remedial investigation and feasibility study that will lead to a final cleanup plan for the site.
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The Data Summary Report (PDF) (413 pp. 15.25MB) summarizes existing information about the site. Note: This file is large and may take over thirty (30) minutes to download on a 56K modem connection.
The Sampling Plan (PDF) (318 pp. 18.3MB) documents the information that needs to be collected in order to complete this project. Note: This file is large and may take over thirty (30) minutes to download on a 56K modem connection.
The Community Involvement Plan (PDF) (6 pp. 72K) summarizes what we will do to make sure that we can hear and respond to your concerns and questions about the site and future proposed cleanup plans.
A diversion system at the site is being maintained cooperatively between EPA, the Oregon Department of Ecology, and the Bureau of Land Management to keep contaminated water away from the creek.
Photo Gallery
Acid Mine Drainage from the Formosa Mine has killed all life in the south fork of Middle Creek. |
Officials from EPA, BLM, ODEQ and Douglas County reflect on what is needed to clean up the site. |
A water diversion system has been attempted to keep some of the contamination from the south fork of Middle Creek |
Documents
Fact Sheets
Contact Information:
[ Main Cleanup | Brownfields ]
[ Superfund | FOIA | Records Center ]
Point of contact: Debra Sherbina
E-Mail: sherbina.debra@epa.gov
Phone Number: (206) 553-0247
Last Updated: 09/17/2009
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