Iron Mountain Mine


map showing spill location in northwest of Redding, California
Spill Location.
graph showing acidity of Iron Mountain water at -3.5 pH
  • LOCATION: Spring Creek, adjacent creeks, and Sacramento River, Shasta County.
  • DATE: Chronic, remediation in progress
  • INCIDENT SUMMARY: Acid mine drainage (AMD) from Iron Mountain Mine runs out of the mine site and into several creeks, reservoirs, and the Sacramento River, impacting many miles of streams and adjacent land. Salmon kills have been noted since 1899.
  • RESPONSIBLE PARTY: Aventis CropScience USA Inc., Stauffer Management Company, Atkemix Thirty Seven Inc.
  • NATURAL RESOURCE TRUSTEES: California Dept. of Fish and Wildlife; United States Fish and Wildlife Service; Bureau of Land Management; Bureau of Reclamation; National Oceanic and Atmospheric Administration.
  • RESOURCES IMPACTED: Instream habitat and wildlife (fish, macroinvertebrates); riparian habitat; fisheries (salmon).
  • SETTLEMENT DETAILS: The trustees settled the NRDA portion of the case for $9 million.
  • STATUS OF RESTORATION: Final Restoration Plan issued in April 2002; restoration projects are complete; see NOAA DARRP site (below) for details.

External Links


Patricia Bratcher
Phone: (530) 225-3845

Office of Spill Prevention and Response
Mailing: P.O. Box 944209, Sacramento, CA 94244-2090
(916) 375-8580 for OSPR Information

Report Oil Spills
(800) 852-7550 or (800) OILS-911

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