Keystone Mining Company · Struck by falling object
LOOSE GROUND FELL FROM THE BACK & STRUCK EMPLOYEE ON THE HEAD WHILE DRILLING.
Keystone Mine: 6 reportable incidents Metal/Non-Metal
Keystone Mining Company
· Underground
Controlled by
Du Shane Kirk L
Inyo County,
CA
·
Abandoned
MSHA Mine ID: 0404390
MSHA record for Keystone Mine (mine ID 0404390). Fatalities, non-fatal incidents grouped by year, current operator and controller, and mine context.
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- Fatalities
- 0
- Total incidents
- 6
- Years on record
- 1985–1991
- Latest incident
- Mar 1991
Ownership history
- Keystone Mining Company 1980 to present
Source: MSHA controller and operator history, updated weekly.
Keystone Mine sits in Inyo County, California, where the Census mining category is 1.7% 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.Inyo County, California · Population 18,803
1.7%
Mining share of county employment
$72,432
Median household income
Source: US Census Bureau, American Community Survey 2023 5-year estimates.
No fatalities recorded at this mine.
Reportable incidents
6 on file1991 · 2 incidents
February 8, 1991
CA · Metal/Non-Metal
laborer, bull gang, parts runner, roustabout, roof trimmer/scaler
SLIP OR FALL OF PERSON
Keystone Mining Company · Fall from ladders
SLIPPED & FELL FROM LADDER THAT LEADS TO WORK PLACE.
1987 · 1 incident
Keystone Mining Company · Struck by... (Not Elsewhere Classified)
HOISTING BAGS O0 CONCRETE MIX. PIPE SLIPPED OFF HOISTING BRACKET HITTING MAN ON THE UPPER RIGHT ARM. CONTUSION TO ARM ABOVE THE ELBOW.
1986 · 1 incident
April 8, 1986
CA · Metal/Non-Metal
haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver
POWERED HAULAGE
Keystone Mining Company · Struck against a moving object
RETARDER QUIT W2RKING DRIVER GOT BRAKES HOT AND COULD NOT STOP TRIED PUTTING TRUCK INTO BANK AND TIPPED OVER
1985 · 2 incidents
November 18, 1985
CA · Metal/Non-Metal
maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech
HANDLING OF MATERIALS
Keystone Mining Company · Over-exertion in lifting objects
TRYING TO SLIDE3TRUCK MOTOR INTO POSITION TO INSTALL ACCESSORY PARTS.
July 18, 1985
CA · Metal/Non-Metal
maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech
POWERED HAULAGE
Keystone Mining Company · Struck against a moving object
EMPLOYEE HAD DRIVEN LOADED TRUCK ON SAME ROUTE AND WAS MECHANIC IN CHARGE OF NENVEHICLE.TRUCK EQUIPPED WITH JALOBS BRAKE RESTARTED STARTED DOWN HILL, DRIVER LOST CONTROL DUE TO EXCESSIVE SPEED WENT OFF ROAD AND TRUNED OVER.DRIVER CLIMBED OUT OF TRUCK AND WAS TAKEN TO DOCTOR BY I NAME AND I NAME.