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: 923 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Imminent-danger orders
ⓘA Section 107(a) order removes miners from an area when an inspector finds an imminent danger. Each order is lifted once the condition is corrected, so this counts orders issued, not orders now in effect.
1
Section 107(a) orders
Most recent order: 2011-01-12.
On record since 2011.
Source: MSHA imminent-danger order records, updated weekly.
Tn mine 20 has $48K in proposed MSHA penalties and $7K outstanding across 15 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.
$48K
proposed penalties
$34K
current assessed
$27K
paid to date
$7K
outstanding
93 assessments are final orders; 15 contested dockets.
Of $45K in penalties contested before the Commission, $25K was upheld in final decisions.
As of the most recent assessment on 2015-01-26.
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.
Source: MSHA violations gravity and negligence coding, updated weekly.
When citations were contested
ⓘContesting a citation before the Federal Mine Safety and Health Review Commission is a lawful right. These figures state the public outcomes of that process, from MSHA's Contested Violations file.
48citations taken to the federal commission · 48% of citations on record
Settled
42 · 88%
Stood as issued
4 · 8%
Vacated or withdrawn
2 · 4%
66%
S&S designation survived the contest
ⓘCounts a Significant & Substantial citation as surviving when a settlement or judge's decision kept the designation, or the contest was dismissed or defaulted so the citation stands as issued. Vacated and withdrawn citations, and settlements that removed the designation, count against.
of 38 decided S&S contests · industry: 79%
44%
Penalty reduction in decided contests
$45K proposed, $25K after decisions · industry: 39%
Source: MSHA Contested Violations file (public record), updated weekly. A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record. Latest contest filed 2015-01-30.
Contested penalties
ⓘA reduction or dismissal at the Commission is a lawful outcome of contesting a proposed penalty. Figures are the proposed amount and the amount upheld in the docket's decision.
Largest penalties this mine contested before the Federal Mine Safety and Health Review Commission, with the outcome on record.
MSHA sampling at Tn mine 20 shows 100% of 37 respirable coal dust samples met the 1.5 mg/m3 standard.
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: 2015-09-19, 10 years ago
100%
within 1.5 mg/m3
37
samples
0.82
dust max (mg/m3)
0
over MSHA ECV
ⓘThe excessive concentration value (ECV) is MSHA's own per-sample enforcement threshold, which builds in measurement uncertainty; a sample over its ECV can trigger a citation. The count covers only samples MSHA assigned an ECV.
34 samples taken by MSHA inspectors, 3 by the operator.
Most-sampled occupations
BULLDOZER OPERATOR13
REFUSE TRUCK DRIVER/BACKFILL TRUCK DRIVE11
HIGHLIFT OPERATOR/FRONT END LOADER6
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.
Health sampling trend
ⓘ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 by year
ⓘ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.
Tn mine 20 recorded 9.64 reportable injury cases per 100 full-time workers in 2011.
Injury rate, 2011
ⓘThis rate is reportable injury cases per 100 full-time-equivalent workers per year, computed as 200,000 times cases divided by MSHA operator-reported employee-hours. Cases are injuries MSHA graded degree 01 through 07; accident-only events that hurt no one are excluded, and so are contractor injuries, whose hours do not attach to a single mine. Rates begin in 2000, when quarterly employment reporting starts, and are withheld below 20,000 hours in a year.
9.64
total case rate
4.82
days-away rate
0.000
fatality rate
Above average. The US coal mining average was 3.83 and the all-US-mining average was 3.08 cases per 100 workers.
In Tennessee, coal mining averaged 4.18 cases per 100 workers that year.
Under 100,000 employee-hours were reported that year, so a single case moves the rate by two or more. Read the figure as approximate.
Year
total case rate
days-away
fatal
2011 *
9.64
4.82
0.000
2010 *
2.26
0.00
0.000
2009 *
17.02
11.35
0.000
* Fewer than 100,000 employee-hours that year; the rate is less stable.
Source: injury cases from MSHA accident and injury records; employee-hours from MSHA quarterly employment reports. Rate is cases per 100 full-time-equivalent workers, operator employees only.
Source: MSHA controller and operator history, updated weekly.
Workforce and production
ⓘCoal production is reported quarterly and lags the current period; the most recent quarters may be incomplete.
Year
Employees
Coal produced (tons)
2016
0
2015
1
2014
5
259
2013
1
2012
0
2011
16
32,080
2010
33
98,739
2009
17
74,399
2008
4
16,131
Source: MSHA quarterly employment and production, updated weekly.
Tn mine 20 sits in Campbell County, Tennessee, where the Census mining category is 0.6% 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.
Campbell County, Tennessee · Population 39,568
0.6%
Mining share of county employment
$50,260
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, when MSHA's quarterly employment data starts; earlier incidents are counted but cannot be rate-adjusted. 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
2016 Q3
0
0
0
2016 Q2
0
0
0
2016 Q1
0
0
0
2015 Q4
0
0
0
2015 Q3
0
0
0
2015 Q2
0
0
0
2015 Q1
120
5
0
41666.7
2014 Q4
0
0
0
Show 23 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2014 Q3
0
0
0
2014 Q2
5,144
7
2
1360.8
2014 Q1
0
1
0
2013 Q4
0
0
0
2013 Q1
159
0
0
0.0
2012 Q4
0
0
0
2012 Q3
0
8
0
2012 Q1
0
0
0
2011 Q4
1,147
1
0
871.8
2011 Q3
2,106
0
0
0.0
2011 Q2
17,209
1
1
58.1
2011 Q1
21,050
16
7
760.1
2010 Q4
21,824
4
4
183.3
2010 Q3
20,401
3
1
147.1
2010 Q2
25,747
17
3
660.3
2010 Q1
20,377
7
4
343.5
2009 Q4
16,109
4
4
248.3
2009 Q3
641
6
2
9360.4
2009 Q2
4,040
0
0
0.0
2009 Q1
14,464
2
2
138.3
2008 Q4
6,491
0
0
0.0
2008 Q3
719
5
3
6954.1
2008 Q2
632
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
6 on file
2011 · 2 incidents
April 19, 2011TN · Coalhaul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driverSLIP OR FALL OF PERSON
Terex 33-09 back-up shorted at radio and caused fire in cab, operator stopped truck and tried to extinguish in an excited state he turned wrong and twisted knee (left).
October 26, 2009TN · Coalwater truck operatorOTHER