Bunker Hill Mining & Metalurgical Complex NPL Site

State TrusteeFederal TrusteeAO Bureau

Also Known As

Coeur d'Alene River Basin

Incident Type




Case Status



Coeur d'Alene River Basin


Contaminants of Concern Include

Affected DOI Resources Include

Migratory Birds, Threatened and Endangered Species

Financial Summary

Restoration Funds Collected:


*Restoration Funds Allocated:


*Restoration Funds Remaining:


* Restoration Funds can contain multiple settlements/projects. All collections are placed in interest bearing accounts. For detailed information on individual settlements/ projects please visit: NRDAR Status Report

Case Description

For over 100 years, the Coeur d’Alene River Basin (Basin) was one of the most productive silver, lead, and zinc mining areas in the United States, producing 7.3 million metric tons of lead and 2.9 million metric tons of zinc between 1883 and 1997. The majority of mining and mineral processing in the Basin occurred along the South Fork of the Coeur d’Alene River and its tributaries. The wastes generated by these operations contain metals, including lead, zinc, cadmium, and arsenic.

For most of the 20th century, these wastes were discharged directly into the river and tributaries or were deposited on lands and migrated into ground and surface waters. Mining products and wastes containing metals were also transported by train and other vehicles that spilled and tracked metals along travel routes in the Basin. Mining-related wastes were also taken from the mine and mill properties or hauled out of the floodplain areas for use in other applications throughout the Basin, including without limitation ballast for railroad lines, materials for street and road surfacing, and concrete aggregate. As a result, mining-related waste rock, tailings, mine drainage, and contaminated floodplain deposits are continuing sources of metals contamination in the Coeur d'Alene Basin. Tailings and contaminated sediments continue to be deposited in the Coeur d’Alene River channel, levees, and floodplain, as well as in lakes and wetlands adjacent to the river, and in Coeur d’Alene Lake. As a result, extremely elevated metals concentrations exist in soil, sediments, and waters throughout the Basin.

In 1983, the U.S. Environmental Protection Agency (USEPA) listed the Bunker Hill Mining and Metallurgical Complex Superfund facility on the National Priorities List (NPL) in response to human health risks associated with mining-related metals contamination in the 21 square-mile area around the former Bunker Hill smelter.

Credit: USFWS

Case Documents

 Document TypeDocument NameDocument Date


 Study Report Injury Assessment and Injury Determination 09/01/2000


 Consent Decree Consent Decree (amended ASARCO) 03/13/2009
 Consent Decree Consent Decree (amended) 03/13/2009
 Consent Decree Consent Decree (Atlantic-Richfield) 01/13/2011
 Consent Decree Consent Decree (Douglas Mining) 12/22/2010
 Consent Decree Consent Decree (Lookout Mountain Mining) 03/22/2011
 Consent Decree Consent Decree (Mascot Mines) 04/12/2010
 Consent Decree Consent Decree (Sunshine Mining) 01/22/2001
 Consent Decree Consent Decree (United Resources) 04/12/2010
 Consent Decree Consent Decree (Zanetti Brothers) 09/23/2010
 Consent Decree Consent Decree-Alice Consolidated 01/19/2012
 Consent Decree Consent Decree-Hecla Ltd. 06/11/2011


 Restoration Implementation Report 2007-2008 Restoration Activities 10/01/2009
 Restoration Monitoring Report 2012 Accomplishments  
 Restoration Plan Final Coeur d'Alene Basin Restoration Plan 05/01/2018
 Restoration Plan and Environmental Assessment Interim Restoration Plan 04/01/2007

Map View

Case Contact

Idaho Fish and Wildlife Office

Boise, ID | (208) 378-5243 | http://www.fws.gov/Idaho/

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