Arenero Estrella Inc has $8K in proposed MSHA penalties and $0 outstanding across 3 contested dockets, plus health sampling and the full incident record.
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Fatalities
0
Total incidents
24
Years on record
1990–2013
Latest incident
Mar 2013
Compliance record
MSHA citations since 2000
59
citations
24
significant & substantial
$8,344
proposed penalties
$7,716
paid to date
92% of proposed penalties paid to date, a $628 gap.
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: 593 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Arenero Estrella Inc has $8K in proposed MSHA penalties and $0 outstanding across 3 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.
$8K
proposed penalties
$8K
current assessed
$8K
paid to date
$0
outstanding
57 assessments are final orders; 3 contested dockets.
Of $2K in penalties contested before the Commission, $1K was upheld in final decisions.
As of the most recent assessment on 2016-06-22.
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.
4citations taken to the federal commission · 7% of citations on record
Settled
4 · 100%
100%
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 Vacated and withdrawn citations, and settlements that removed the designation, count against.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 2 decided S&S contests · industry: 79%
30%
Penalty reduction in decided contests
$2K proposed, $1K 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 2014-01-17.
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.
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.
Metal and nonmetal contaminants (personal samples)
ⓘMany samples are screening measurements of substances with no applicable exposure limit; they are counted as samples but excluded from every over-limit figure. Over-limit shares use only limit-tested samples.
Last sampled: 2026-01-29
0%
of limit-tested samples over the exposure limit
9
samples
6
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz5
Respirable dust, <.1mg2
Aluminum oxide fumes1
Arsenic fumes1
Show the individual readings (23)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2026-01-29
Quartz, respirable, >1% Qtz
0.31
Laborer, Bullgang
2012-06-28
Quartz, respirable, >1% Qtz
0.18
1.26
0.14
Cleanup Man
2008-12-18
Quartz, respirable, >1% Qtz
0.31
1.17
0.26
Cleanup Man
2005-01-20
Respirable dust, <.1mg
0
Truck Driver
2005-01-20
Quartz, respirable, >1% Qtz
0.41
1.55
0.26
Cleanup Man
2003-10-29
Quartz, respirable, >1% Qtz
0.12
1.46
0.08
Cleanup Man
2003-08-27
Respirable dust, <.1mg
0
Cleanup Man
2001-11-01
Chromium, insoluble
0
1
0.00
Welder, etc.
2001-10-01
Magnesium oxide fumes
0
10
0.00
Welder, etc.
2001-10-01
Manganese fumes
0
5
0.00
Welder, etc.
2001-10-01
Aluminum oxide fumes
0.01
10
0.00
Welder, etc.
2001-10-01
Nickel fumes
0
1
0.00
Welder, etc.
2001-10-01
Titanium dioxide fumes
0
10
0.00
Welder, etc.
2001-10-01
Vanadium fumes
0
50
0.00
Welder, etc.
2001-10-01
Zinc oxide fumes
0
5
0.00
Welder, etc.
2001-10-01
Molybdenum fumes
0
10
0.00
Welder, etc.
2001-10-01
Arsenic fumes
0
500
0.00
Welder, etc.
2001-10-01
Beryllium fumes
0
2
0.00
Welder, etc.
2001-10-01
Cadmium oxide fumes
0
100
0.00
Welder, etc.
2001-10-01
Cobalt fumes
0
100
0.00
Welder, etc.
2001-10-01
Copper fumes
2.82
100
0.03
Welder, etc.
2001-10-01
Iron oxide fumes
0.06
10
0.01
Welder, etc.
2001-10-01
Lead fumes
0.61
150
0.00
Welder, etc.
Source: MSHA respirable dust, quartz, and noise sampling records, updated weekly. Metal/nonmetal contaminant figures come from MSHA's Personal Health Samples and Area Samples files (public record), updated weekly.
Arenero Estrella Inc recorded 0.00 reportable injury cases per 100 full-time workers in 2015.
Injury rate, 2015
ⓘ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.
0.00
total case rate
0.00
days-away rate
0.000
fatality rate
Below average. The US metal and nonmetal mining average was 2.26 and the all-US-mining average was 2.72 cases per 100 workers.
In Puerto Rico, metal and nonmetal mining averaged 1.98 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
2015 *
0.00
0.00
0.000
2014 *
0.00
0.00
0.000
2013 *
32.40
32.40
0.000
2008 *
4.52
4.52
0.000
2007 *
0.00
0.00
0.000
2006 *
3.93
3.93
0.000
2005 *
4.25
4.25
0.000
2004 *
0.00
0.00
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
Year
Employees
2026
7
2025
7
2016
9
2015
10
2014
25
2013
19
2012
10
2011
3
2010
5
2009
6
2008
24
2007
23
2006
26
2005
22
2004
20
2003
13
2002
16
2001
14
2000
12
Source: MSHA quarterly employment and production, updated weekly.
Arenero Estrella Inc sits in Bayamón Municipio, Puerto Rico, where the Census mining category is 0.0% 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.
Bayamón Municipio, Puerto Rico · Population 183,456
0.0%
Mining share of county employment
$30,729
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
2026 Q2
3,817
0
0
0.0
2026 Q1
3,234
0
0
0.0
2025 Q4
3,120
0
0
0.0
2016 Q3
2,549
0
0
0.0
2016 Q1
6,691
0
0
0.0
2015 Q4
5,030
0
0
0.0
2015 Q3
5,500
1
1
181.8
2015 Q2
4,786
0
0
0.0
Show 61 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2015 Q1
6,174
1
0
162.0
2014 Q4
6,675
0
0
0.0
2014 Q3
5,635
0
0
0.0
2014 Q2
4,084
0
0
0.0
2014 Q1
4,204
2
0
475.7
2013 Q4
7,438
0
0
0.0
2013 Q3
8,796
1
0
113.7
2013 Q2
3,679
4
1
1087.3
2013 Q1
4,775
0
0
0.0
2012 Q4
6,247
2
0
320.2
2012 Q3
6,813
0
0
0.0
2012 Q2
4,072
2
1
491.2
2012 Q1
786
0
0
0.0
2011 Q4
1,488
0
0
0.0
2011 Q3
1,360
0
0
0.0
2011 Q2
1,380
0
0
0.0
2011 Q1
1,427
0
0
0.0
2010 Q4
1,317
0
0
0.0
2010 Q3
3,405
4
1
1174.7
2010 Q2
1,077
0
0
0.0
2010 Q1
1,054
1
0
948.8
2009 Q4
1,293
0
0
0.0
2009 Q3
2,188
1
0
457.0
2009 Q2
2,430
0
0
0.0
2009 Q1
4,925
0
0
0.0
2008 Q4
9,904
2
2
201.9
2008 Q3
8,880
3
1
337.8
2008 Q2
13,523
0
0
0.0
2008 Q1
11,924
0
0
0.0
2007 Q4
11,163
1
0
89.6
2007 Q3
11,942
2
0
167.5
2007 Q2
12,851
0
0
0.0
2007 Q1
13,847
1
1
72.2
2006 Q4
13,990
0
0
0.0
2006 Q3
11,921
0
0
0.0
2006 Q2
12,186
0
0
0.0
2006 Q1
12,830
3
0
233.8
2005 Q4
11,504
0
0
0.0
2005 Q3
12,503
0
0
0.0
2005 Q2
12,425
1
0
80.5
2005 Q1
10,675
3
1
281.0
2004 Q4
10,312
0
0
0.0
2004 Q3
10,671
0
0
0.0
2004 Q2
11,665
5
5
428.6
2004 Q1
10,176
0
0
0.0
2003 Q4
7,414
0
0
0.0
2003 Q3
5,292
1
0
189.0
2003 Q2
7,037
0
0
0.0
2003 Q1
6,942
1
1
144.1
2002 Q4
6,763
0
0
0.0
2002 Q3
7,515
0
0
0.0
2002 Q2
6,957
2
1
287.5
2002 Q1
6,405
0
0
0.0
2001 Q4
5,807
5
4
861.0
2001 Q3
3,278
0
0
0.0
2001 Q2
6,393
5
2
782.1
2001 Q1
6,791
0
0
0.0
2000 Q4
5,953
2
1
336.0
2000 Q3
6,689
0
0
0.0
2000 Q2
6,133
0
0
0.0
2000 Q1
6,441
1
0
155.3
No fatalities recorded at this mine.
Reportable incidents
24 on file
2013 · 4 incidents
March 11, 2013PR · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanFALLING/SLIDING/ROLLING MATERIALS
The choke broke and the bucket is down and hurt the left leg.
February 11, 2013PR · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorSLIP OR FALL OF PERSON
The EE injured his hand with the end of the hammer while cleaning the return rollers of the converyor.
2006 · 1 incident
September 5, 2006PR · Metal/Non-Metalhaul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driverSLIP OR FALL OF PERSON
EMPLOYEE WAS GOING TO REMOVE A TREE BRANCH FROM A STOCK PILE, WHEN HE ACCIDENTALLY PUT HIS HAND ON THE CONVEYOR DRIVE MOTOR GRASPING HIS GLOVE AND PUNCTURE HIS RIGHT FINGERNAIL.
1997 · 1 incident
August 25, 1997PR · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanMACHINERY
EMPLOYEE WAS ADJUSTING THE SYMONS CRUSHER BY PULLING IT WITH A CHAIN. THE CRUSHER BOWL GOT JAMMED AND THEY PULLED IT WITH A LARGER LOADER BREAKING THE CHAIN. CONSEQUENTLY, THE CHAIN FLEW AND H IT HIS RIGHT LEG.
THE TRUCK DRIVER WAS FULLY FAMILIAR WITH THE UNIT IN SUCH A WAY THAT HE WAS OVER CONFIDENT & SHIFTED THE TRUCK UPHILL CAUSING IT TO MISS THE GEAR & SPEED DOWN THE HILL
February 16, 1995PR · Metal/Non-Metaloutside foreman, leadmanMACHINERY
WHILE DRIVING A DUMP TRUCK, USING THE SEATBELT, THE ROAD WAS WET THE TRUCK SLIP AND FLIP OVER. THE DRIVER WAS USING THE SEATBELT BUT HE GOT HIT ON THE RIGHT LEG. THE DRIVER DIDN'T HAVE ANY FRA CTURE BUT HE WAS REPORT TO THE FS.D.E.
1991 · 2 incidents
October 30, 1991PR · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorHANDLING OF MATERIALS
October 29, 1991PR · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanHANDTOOLS (NONPOWERED)
Arenero Estrella Inc · Caught in, under or between a moving and a stationary object
HANDYMAN HELPING THE DOWN EQUIPMENT ON A PLATFORM SMASHED ONE OF HIS FINGERS WITH THE HANDLE OF A LOAD BINDER WHEN HE TIGHTENED ONE OF THE CHAINS.
1990 · 1 incident
September 10, 1990PR · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techSLIP OR FALL OF PERSON