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Jump to Overview DEPARTMENT OF LABOR MINE SAFETY AND HEALTH ADMINISTRATION Metal and Nonmetal Mine Safety and Health REPORT OF INVESTIGATION Surface Metal Mine ( Lead and Zinc ) Fatal Falling Material Accident December 15, 2006 Teck Cominco Alaska Inc Red Dog Mine Kotzebue, Northwest Arctic County, Alaska Mine ID No. 50-01545 Investigator James E. Dejarnatt Mine Safety and Health Inspector Originating Office Mine Safety and Health Administration Western District 2060 Peabody Road, Suite 610 Vacaville, CA 95687 Arthur L. Ellis, District Manager OVERVIEW
Jeffrey Huber, geologist, age 51, was fatally injured on December 15, 2006, when he was struck by a large piece of frozen, conglomerated material that rolled from the top of a muckpile. The victim was examining the muckpile face to determine the location of the ore-waste contact point. The accident occurred because management failed to establish procedures requiring muckpiles to be trimmed before persons performed any work at the muckpile faces. GENERAL INFORMATION
Red Dog Mine, a surface lead and zinc mine, operated by Teck Cominco Alaska Inc., was located in Kotzebue, Norwest Arctic County, Alaska. The principal operating officials were David Thompson, president, and Doug Horswill, vice president. The mine was normally operated two 12 hour shifts a day, 7 days per week. Total employment was 360 persons. Lead and zinc ore was drilled, blasted, and removed from a multiple bench pit. The ore was crushed and conveyed to the mill grinding and sulphide flotation circuit to produce zinc and lead concentrates. The concentrate was trucked to a port. The finished products were shipped and sold to commercial industries. The last regular inspection at this operation was completed on November 2, 2006. DESCRIPTION OF ACCIDENT
On the day of the accident, Jeffrey Huber (victim) began his normal shift at 6:00 a.m. About 7:10 a.m., he reported to the mine office for the daily staff meeting. At approximately 8:30 a.m., Huber drove a pickup truck to the 750-28 level muckpile in the pit to examine the muckpile face and identify the ore-waste contact points. Before entering the muckpile area, he made radio contact with Josh Rutman, front-end loader operator, who backed away about 75 feet before he resumed removing material. Huber commenced his muckpile examinations and each time he entered the muckpile area, he first contacted Rutman on the radio. This activity proceeded without incident until about 10:50 a.m. At that time, Rutman had moved his loader to another location while Huber again examined the face of the muckpile. Rutman looked to his left while backing out of the face and saw Huber pinned under frozen material. He immediately called for medical assistance. Mine personnel responded, treated the victim, and transported him to the site medical clinic where he was pronounced dead by the resident physician assistant. The cause of death was attributed to multiple trauma. INVESTIGATION OF ACCIDENT
MSHA was notified of the accident at 11:22 a.m., on December 15, 2006, by a telephone call from John Knapp, general manager, to MSHA's emergency hotline. Rodney Gust, mine safety and health specialist, was notified and an investigation was started the same day. An order was issued to ensure the safety of the miners under the provisions of Section 103(k) of the Mine Act. MSHA's accident investigator traveled to the mine, conducted a physical inspection of the accident scene, interviewed employees, and reviewed conditions and work procedures relevant to the accident. MSHA conducted the investigation with the assistance of mine management, employees, and the miners' representative. DISCUSSION
Location The accident occurred in the pit at the 750-28 level muckpile. Muckpile Face The muckpile was approximately 19 feet high and 150 feet wide. It was composed of frozen, conglomerated material that had been blasted on November 25th. The bench area was level and frozen. Light plants were provided for additional visibility. The material that struck the victim was about 6 ½ feet long x 6 ½ feet wide x 3 ½ feet thick and weighed approximately 4 tons. Muckpile Examination Procedures After each blast, a geologist would examine the top of the muck pile and position stakes to delineate the ore-waste contact point. The crew would muck the blasted rock until a stake was encountered, then the front-end loader operator would call for the geologist to examine the muckpile face to ensure ore was loaded rather than waste rock. The past practice was that the geologist would walk to the toe of the face and visually examine the material and inform the loader operator regarding the location of the ore. Weather Conditions The weather on the day of the accident was clear with a slight wind and a temperature of -4 degrees Fahrenheit. The temperature caused the blasted material to freeze together. This resulted in the formation of a large mass of conglomerated material that was positioned near the top of the face. Training and Experience Jeffrey Huber had 10 years and 10 months of total mining experience. He had worked 2 yrs and 10 months at this mine as a geologist and during this period his duties included examining muckpile face areas. He had received training in accordance with 30 CFR, Part 48. ROOT CAUSE ANALYSIS
A root cause analysis was conducted and the following root cause was identified: Root Cause: Management policies and controls were inadequate. There were no procedures requiring muckpiles to be trimmed to prevent hazards to persons and ensure that miners could safely examine muckpiles while standing near the face. Management failed to identify the blasted chunks of frozen material near the top of the muck pile as a potential hazard. Corrective Action: Management should establish formalized policies and procedures that require muckpiles to be trimmed to prevent hazards to persons and ensure that examinations of muckpiles can be conducted safely. CONCLUSION
The accident occurred because the muckpile face was not trimmed to prevent hazards to persons required to work or travel in that area. ENFORCEMENT ACTION
Order No. 6392146: was issued on December 15, 2006, under the provisions of Section 103(k) of the Mine Act:
Citation No.6392148: was issued on February12, 2007, under the provisions of Section 104(a) of the Mine Act for a violation of 30 CFR 56.9314:
Related Fatal Alert Bulletin: APPENDIX A
Persons Participating in the Investigation Teck Cominco Alaska Inc
Steve Rhodes .......... reliability general foreman Warren Draper .......... mine general foreman Robert Nelson .......... safety and training Officer Ray Martin .......... miner's representative
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