ASARCO Ray Mine and Hayden Smelter

State TrusteeState of Arizona
AO Bureau

Also Known As

Incident Type




Case Status



Mineral Creek and Gila River


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

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Case Description

The ASARCO Ray Mine/Hayden Smelter Complex near Hayden, AZ released of hazardous substances into Mineral Creek and eventually the Gila River. In addition, multiple groundwater wells down-gradient of the Ray Mine were found to be highly contaminated by a common leachate solution which was attributed to releases by ASARCO into shallow groundwater along Mineral Creek. Numerous spills of mine wastes also occurred at the Hayden Smelter facility, located approximately 20 miles southeast of the Ray Mine in the Town of Hayden. During bankruptcy proceedings the natural resources trustees, including the State of Arizona and the Department of the Interior-U.S. Fish and Wildlife Service, determined that resources under the jurisdiction of these agencies were likely injured.

Case Documents

 Document TypeDocument NameDocument Date


 Factsheet Riparian Area Improvements 02/01/2012


 MOA/MOU Trustees Agreement 07/30/2010


 Settlement Agreement Settlement Agreement 03/30/2009


 Restoration Plan and Environmental Assessment Restoration Plan and Environmental Assessment 12/20/2012

Map View

Case Contact

Arizona Ecological Services Field Office

Phoenix, AZ | (602) 242-0210 |

Case Trustees

AO Bureau
State TrusteeState of Arizona

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