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Mine Disasters in
the United States

El Dorado Limestone Company
El Dorado Mine Hoisting Accident

Shingle Springs, California
January 5, 1971
No. Killed - 4

USBM Final Investigation Report  PDF Format

From the Google News Archives:  External Link
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Four men were fatally injured when the cage they were riding plunged about 600 feet to the bottom of the shaft.  The direct cause of the accident was the breaking of the clutch-band anchor on the south drum, which disengaged the clutch and permitted the hoisting cable to unwind.

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