Click Here to visit the ITRC Homepage
Click Here to visit the Mining Waste Home Page
Click Here for Tech-Reg Guidance Page
Click Here for Decision Tree
Click Here for Technology Overviews
Click Here for Case Studies
Click Here for Regulatory Issues
Click Here for Other Resources
Click Here for Additional Resources
Click Here for Appendices
Click Here to Contact UsClick Here to Contact Us
Click Here for Site Map


Case Study as part of a Web-based Technical and Regulatory Guidance

Sunshine Mine
Shoshone County, Idaho

1. Site Information
1.1 Contacts
Vance Weems
Ionic Water Technologies
Telephone: 775-321-8101
E-mail: vweems@iwtaechnologies.com

Timothy Tsukamoto, Ph.D.
Telephone: 775-321-8101
E-mail: ttsukamoto@iwtechnologies.com

1.2 Name, Location, and Description
The Sunshine Mine is an underground silver mine located between the towns of Kellogg and Osburn, in Shoshone County, Idaho. The Sunshine Mine is in the Coeur D'Alene mining district of the Idaho panhandle.

Image-Sunshine Mine Figure 1-1
Figure 1-1. Sunshine Mine location. Created with ArcGIS Desktop Version: 9.3.1.

2. Remedial Action and Technologies
At the Sunshine Mine, the primary impacts are from iron and manganese. Affected media include surface stream water (e.g., stream, rivers, runoff, drainage) and surface pool water (e.g., lakes, ponds, and pools). Reclamation of the site falls under the provisions of the Clean Water Act (CWA). Site cleanup goals are based on the mitigation of human health risk and mitigation of ecological risk. The primary treatment technology in place at the Sunshine Mine is chemical precipitation, including manganese removal from mining-influenced water (MIW) through lime neutralization and oxidation with the rotating-cylinder treatment system (RCTS) system. The RCTS was first tested in a pilot scale for manganese removal from water due to mine dewatering operations but is now a full-scale operation. Chemical precipitation has been operating since May 2007 and is expected to be in operation for as long as mine dewatering continues. The quantity of affected water being remediated is approximately 230–920 gallons per minute.

3. Performance
Performance criteria consist of manganese removal from solution through lime neutralization and oxidation with the RCTS system. The performance applicable standards are CWA removal of manganese. It was discovered that the RCTS was effective at oxidizing and precipitating manganese with limited concentrations of iron. A single RCTS-60HS (600-gal capacity) unit was effective in reducing manganese concentrations from 30 to 0.05 mg/L with less than 3 minutes residence time in the system (with a flow rate of about 230 gallons per minute).

4. Costs
Cost of activities at these site are reported as a total:

5. Regulatory Challenges
None encountered.

6. Stakeholder Challenges
No information available.

7. Other Challenges and Lessons Learned
None reported.

8. References
No information available.

Image-spacer
This Web site is owned by ITRC • www.itrcweb.org
50 F Street St., NW • Suite 350 • Washington, DC 20001 • P: 202-266-4920 • F: 202-266-4937 • Sponsored by Environmental Council of the States

Disclaimer, Privacy, and Usage Policies

Click Here to Register for Free IBT Training on Document Click Here to visit the ITRC website Click Here to Go Back to the Previous Page Click Here to Visit Contaminated Dediments Team Public Page Click Here to Return to Title Page Click Here for a Printer Friendly Version of This Page