Division of Spill Prevention and Response

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Fort Knox Gold Mine Cyanide Water Spill



Incident Description

Incident Location Map

Location Fort Knox Gold Mine, Fairbanks, Alaska.
Product/Quantity The process water spill occurred within the ore processing facility. Fort Knox estimates the amount spilled at 305,300 gallons. Approximately 270,000 to 275,000 gallons remained within the building, while the remaining 30,000 to 35,000 gallons spilled onto the gravel roadway and parking area.
Cause Failure of the automated process control system.
Time/Date of Incident The spill occurred at approximately 8:30 PM on May 4, 2010. Fort Knox Gold Mine notified ADEC via the Alaska State Troopers at approximately 9:49 PM on May 4, 2010.
Situation Reports
10/04/2010 (PDF 34K) -- FINAL

05/05/2010 (PDF 193K)

 

 

Photos
May 5, 2010      
CIC plume path along CIC access road. CIC plume path and CIP tailings release. CIC solution pathway downgradient of scour channel.  
CIC plume path along CIC access road. CIC plume path and CIP tailings release. CIC solution pathway downgradient of scour channel.  
CIC solution pathway upgradient of scour channel. Sump in parking area with CIC solution.    
CIC solution pathway upgradient of scour channel. Sump in parking area with CIC solution.    
CIC solution scour channel to CIP tailings impoundment. Contaminated soil stockpile. Impacted pad area.  
CIC solution scour channel to CIP tailings impoundment. Contaminated soil stockpile. Impacted pad area.  
For more information

John Ebel, ADEC, (907) 451-2175