Mining Incidents

BORON OPERATIONS UNDERGROUND MIN: 1 MSHA citation Metal/Non-Metal

U S Borax Inc · Underground
Controlled by Rio Tinto Group
kern, Kern County, CA  ·  Abandoned
MSHA Mine ID: 0405366

BORON OPERATIONS UNDERGROUND MIN has no reportable incidents on file with MSHA. MSHA has proposed $55 in penalties since 2001.

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Fatalities
0
Total incidents
0
Years on record
—
Latest incident
—
Compliance record
MSHA citations since 2001
1
citations
0
significant & substantial
$55
proposed penalties
$55
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
2
inspections on record
53
inspection hours
n/a
citations per 100 inspection hours
ⓘ This rate is recorded citations divided by MSHA inspection hours, per 100 hours. It reflects inspection effort, not mine size or production.
Rate withheld: 53 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

BORON OPERATIONS UNDERGROUND MIN has $55 in proposed MSHA penalties and $0 outstanding across 0 contested dockets.

Penalty disposition
ⓘ Differences between proposed and paid penalties reflect both settlements and conference reductions and amounts still owed. Outstanding is the balance currently owed.
$55
proposed penalties
$55
current assessed
$55
paid to date
$0
outstanding
1 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2001-01-17.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
Violation severity profile
ⓘ Shares are computed over citations that carry the MSHA gravity and negligence coding; a small share of records are uncoded.
0.0%
significant & substantial
0.0%
high negligence or reckless
0.0%
reasonably likely or greater
0.0%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 100.0% low, 0.0% moderate, 0.0% high, 0.0% reckless.
Source: MSHA violations gravity and negligence coding, updated weekly.
Ownership history
  1. U S Borax Inc 1999 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2001 5
2000 2
1999 0
Source: MSHA quarterly employment and production, updated weekly; years before 2000 come from MSHA's archived Part 50 employment files.

BORON OPERATIONS UNDERGROUND MIN sits in Kern County, California, where the Census mining category is 2.3% 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.
Kern County, California · Population 910,433
2.3%
Mining share of county employment
$67,660
Median household income
Source: US Census Bureau, American Community Survey 2023 5-year estimates.
Quarterly safety rates
ⓘ Citations per million reported employee-hours. Rates begin in 2000; earlier incidents are counted but not rate-adjusted, though reported hours reach back to 1983. Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.
Citations per million employee-hours, as reported to MSHA
Quarter Hours worked Citations S&S Per 1M hrs
2001 Q2 0 0 0
2001 Q1 115 0 0 0.0
2000 Q4 123 0 0 0.0
2000 Q3 21 0 0 0.0
2000 Q2 0 0 0
2000 Q1 0 0 0

No reportable incidents on file.

MSHA has no recorded reportable accidents for this mine in the current dataset. New reports appear here within a week of being filed.