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.
38 citations across 1,158 inspection hours.
Source: MSHA inspections data, updated weekly.
Mammoth Colliery has $3K 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.
$3K
proposed penalties
$3K
current assessed
$3K
paid to date
$0
outstanding
38 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2007-04-09.
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.
MSHA sampling at Mammoth Colliery shows 99% of 80 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: 2006-04-11, 20 years ago
99%
within 1.5 mg/m3
80
samples
7.18
dust max (mg/m3)
66 samples taken by MSHA inspectors, 14 by the operator.
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.
Mammoth Colliery recorded 6.10 reportable injury cases per 100 full-time workers in 2005.
Injury rate, 2005
ⓘ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.
6.10
total case rate
6.10
days-away rate
0.000
fatality rate
Above average. The US coal mining average was 5.11 and the all-US-mining average was 4.21 cases per 100 workers.
In Pennsylvania, coal mining averaged 5.95 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
2005 *
6.10
6.10
0.000
2004 *
0.00
0.00
0.000
2003 *
0.00
0.00
0.000
2002 *
0.00
0.00
0.000
2001 *
4.11
4.11
0.000
2000 *
5.35
5.35
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)
2007
0
2006
10
2,981
2005
14
55,385
2004
18
58,355
2003
23
60,455
2002
22
79,998
2001
21
90,411
2000
18
86,515
Source: MSHA quarterly employment and production, updated weekly.
Mammoth Colliery sits in Schuylkill County, Pennsylvania, where the Census mining category is 1.1% 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.
Schuylkill County, Pennsylvania · Population 143,259
1.1%
Mining share of county employment
$66,901
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
2007 Q4
0
0
0
2007 Q3
0
0
0
2007 Q2
0
2
0
2007 Q1
0
0
0
2006 Q4
0
0
0
2006 Q3
4,651
0
0
0.0
2006 Q2
7,359
5
3
679.4
2006 Q1
6,805
0
0
0.0
Show 24 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2005 Q4
6,995
1
0
143.0
2005 Q3
7,436
0
0
0.0
2005 Q2
8,279
0
0
0.0
2005 Q1
10,091
1
0
99.1
2004 Q4
6,640
0
0
0.0
2004 Q3
7,170
2
1
278.9
2004 Q2
5,857
3
0
512.2
2004 Q1
14,703
0
0
0.0
2003 Q4
12,709
4
1
314.7
2003 Q3
12,342
0
0
0.0
2003 Q2
12,004
3
2
249.9
2003 Q1
12,721
0
0
0.0
2002 Q4
12,824
2
0
156.0
2002 Q3
12,454
0
0
0.0
2002 Q2
12,495
4
1
320.1
2002 Q1
12,692
1
0
78.8
2001 Q4
13,178
1
1
75.9
2001 Q3
10,688
0
0
0.0
2001 Q2
10,936
4
0
365.8
2001 Q1
13,839
1
1
72.3
2000 Q4
9,995
1
0
100.1
2000 Q3
9,072
0
0
0.0
2000 Q2
8,181
3
1
366.7
2000 Q1
10,143
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
9 on file
2005 · 1 incident
April 6, 2005PA · Coallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanHANDLING OF MATERIALS
Blaschak Coal Corp · Caught in, under or between two or more moving objects
WHILE EMPLOYEE WAS PICKING ROCK IN CLEANING PLANT, A ROCK ROLLED OFF THE UPPER PORTION OF PICKING TABLE AND PINCHED HIS RIGHT HAND BETWEEN TWO ROCKS. EMPLOYEE ORIGINALLY REPORTED NO MEDICAL TREATMENT NEEDED. HE LATER SOUGHT TREATMENT.
2001 · 1 incident
November 29, 2001PA · Coalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techSLIP OR FALL OF PERSON
EMPLOYEE WAS DISMOUNTING THE D-6 BULLDOZER FROM THE TRACK TO THE BLADE WHEN HE SLIPPED. BOTH TRACK AND BLADE ARM HAD WET SILT DEPOSITS ON THEM. HE RETURNED TO WORK THE NEXT DAY AND WORKED UNTI L 6/14/00. CALLED IN ON 6/15/00 AND SAID HE WOULD BE OUT OF WORK BECAUSE HIS BACK HURT. HE HAS NOT RETURNED.
UNLOADING FLAT 6ED TRUCK OF PIPE-WHILE BARRING TO ROLL LENGTH OF PIPE OFF TRUCK-SLIPPED & FELL OFF TRUCK STRIKING RIGHT ELBOW & LOWER RIGHT LEG ON GROUND.