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Gray Rock Quarry: 1 reportable incident Metal/Non-Metal

Shasta County, CA  ·  Abandoned
MSHA Mine ID: 0404349

Gray Rock Quarry has had no fatalities among 1 reportable incident since 1983.

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Fatalities
0
Total incidents
1
Years on record
1983
Latest incident
Jul 1983
Ownership history
  1. Flintkote Cement Company 1979 to 1980
  2. Calaveras Cement Company 1980 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
1989 0
1988 13
1987 15
1986 15
1985 15
1984 16
1983 16
Source: MSHA quarterly employment and production, updated weekly; years before 2000 come from MSHA's archived Part 50 employment files.

Gray Rock Quarry sits in Shasta County, California, where the Census mining category is 0.1% of county employment.

Local economic context
ⓘ County figures come from the US Census Bureau's American Community Survey, 5-year pooled estimates, so the 2023 vintage covers 2019 through 2023. The Census category is 'mining, quarrying, and oil and gas extraction', which is broader than MSHA jurisdiction and includes oil and gas workers no mine employs. These figures describe the surrounding county, not this mine, and are not a factor in any specific incident.
Shasta County, California · Population 181,554
0.1%
Mining share of county employment
$71,931
Median household income
Source: US Census Bureau, American Community Survey 2023 5-year estimates.
No fatalities recorded at this mine.

Reportable incidents

1 on file

1983 · 1 incident

July 29, 1983 CA · Metal/Non-Metal driller, highwall operator, highwall drill operator MACHINERY
Calaveras Cement Company · Caught in, under or between (Not Elsewhere Classified)

INJURED WAS HOLDING A CENTRALIZING COUPLER ON THE KELLY BAR DRILL STEEL WHILE ANOTHER MINER WAS HOLDING THE HAMMER ON THE GROUND ANOTHER MINER WAS OPERATING THE ROCK DRILL AND WHEN THE KELLY B AR THREADS CAME IN CONTACT WITH THE FEMALE END OF THE HAMMER THE INJUREDS RIGHT MIDDLE FINGER WA