IN THE PROCESS OF CLEANING THE SILO, CONTRACTOR'S SUPERVISOR ENTERED THE SILO. A LEDGE OF HARDENED CEMENT ON WHICH HE WAS STANDING GAVE WAY CAUSING HIM TO FALL TO THE BOTTOM OF THE SILO. A RES ULTING AVALANCHE OF CEMENT CASCADED DOWN UPON HIM AND BURIED HIM.
Keystone Cement Company: 1 recorded fatality operator
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Top causes
- HANDLING OF MATERIALS 1 fatality · 24 non-fatal
- SLIP OR FALL OF PERSON 13 non-fatal
- HANDTOOLS (NONPOWERED) 11 non-fatal
- MACHINERY 7 non-fatal
- POWERED HAULAGE 7 non-fatal
- OTHER 3 non-fatal
Incident timeline
Mines on record
Fatalities under this operator
1 recordedWhere Keystone Cement Company stands on silica, penalties, and injury rate
MSHA's standard limits respirable silica to 50 micrograms per cubic metre, but MSHA publishes dust and quartz as separate files and never the silica figure itself. We derive it per sample, score it against the limit, and set the operator's injury rate against a benchmark built from the full MSHA operator record. With the 26-year penalty trail, contest posture, and fatality history. Delivered as a PDF with the underlying data as CSV.
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