Clayton V Roberts: 9 reportable incidents controller
MSHA controller ID: C14469
Watch this controller
Email me when a new MSHA incident is filed at any mine Clayton V Roberts controls.
- Fatalities
- 0
- Total incidents
- 9
- Mines on record
- 2
- Years on record
- 1990–1995
Inspection activity
MSHA inspections since 2000
1
inspections on record
5
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: 5 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Health sampling
ⓘ
A sample is a point in time compliance measurement, not an individual exposure history. These figures describe MSHA sampling records and do not establish causation or personal dose.Respirable coal dust
ⓘ
Respirable coal dust and silica figures cover coal facilities. Dust compliance is measured against the current 1.5 mg/m3 standard; samples predating the 2014 standard are included, so compliance rates are a coarse historical signal.
Last sampled: 2002-12-23, 23 years ago
ⓘ
Respirable coal dust and silica figures cover coal facilities. Dust compliance is measured against the current 1.5 mg/m3 standard; samples predating the 2014 standard are included, so compliance rates are a coarse historical signal.91%
within 1.5 mg/m3
80
samples
8.04
dust max (mg/m3)
37 samples taken by MSHA inspectors, 43 by the operator.
Most-sampled occupations
- CONTINUOUS MINER OPERATOR29
- MOBILE BRIDGE OPERATOR11
- CUTTING MACHINE OPERATOR6
Silica (quartz)
Last sampled: 2002-04-17, 24 years ago15.4
silica avg (%)
10
samples
27.0
silica max (%)
Most-sampled occupations
- CONTINUOUS MINER OPERATOR4
Noise
ⓘ
The share counts noise samples whose measured dose exceeded the 90 dBA permissible exposure limit. It describes the sampled workplace, not what reached the miner's ear: hearing conservation programs and the hearing protection worn during the shift are recorded separately and are not reflected here.
Last sampled: 2002-04-11, 24 years ago
ⓘ
The share counts noise samples whose measured dose exceeded the 90 dBA permissible exposure limit. It describes the sampled workplace, not what reached the miner's ear: hearing conservation programs and the hearing protection worn during the shift are recorded separately and are not reflected here.20%
over PEL
10
samples
Most-sampled occupations
- ROOF BOLTER (SINGLE HEAD)3
- BELT MAN/CONVEYOR MAN2
- SCOOP CAR OPERATOR2
Source: MSHA respirable dust, quartz, and noise sampling records, updated weekly.
Top causes
- HANDLING OF MATERIALS 4 non-fatal
- FALL OF ROOF OR BACK 2 non-fatal
- HANDTOOLS (NONPOWERED) 1 non-fatal
- POWERED HAULAGE 1 non-fatal
- SLIP OR FALL OF PERSON 1 non-fatal
Incident timeline
1995
1
1991
5
1990
3
Operators under this controller
Mines on record
For insurers, brokers, and safety consultants
Where Clayton V Roberts 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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