Mining Incidents

Calaveras Cement Company: 221 reportable incidents operator

Controlled by Heidelberg Materials AG
MSHA operator ID: L09888

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Fatalities
0
Total incidents
221
Mines on record
3
Years on record
1983–1999

Top causes

Incident timeline

1999
18
1998
23
1997
16
1996
15
1995
14
1994
27
1993
18
1992
9
1991
29
1990
22
1989
11
1988
3
1987
2
1986
5
1985
3
1984
3
1983
3

Mines on record

For insurers, brokers, and safety consultants

Where Calaveras 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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