Cantera La Montaña has $31K in proposed MSHA penalties and $562 outstanding across 0 contested dockets, plus health sampling and the full incident record.
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Fatalities
0
Total incidents
19
Years on record
2002–2012
Latest incident
May 2012
Compliance record
MSHA citations since 2000
152
citations
52
significant & substantial
$30,754
proposed penalties
$30,192
paid to date
98% of proposed penalties paid to date, a $562 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
148
inspections on record
1,289
inspection hours
11.8
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.
152 citations across 1,289 inspection hours.
Source: MSHA inspections data, updated weekly.
Cantera La Montaña has $31K in proposed MSHA penalties and $562 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.
$31K
proposed penalties
$31K
current assessed
$30K
paid to date
$562
outstanding
147 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-02-10.
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.
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: 2025-06-10
0%
of limit-tested samples over the exposure limit
9
samples
8
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz5
Nuisance dust, total, <1% Qtz3
Respirable dust, <.1mg1
Show the individual readings (9)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2025-06-10
Nuisance dust, total, <1% Qtz
0.28
10
0.03
Front-end Loader Operator
2025-03-27
Nuisance dust, total, <1% Qtz
0
10
0.00
Truck Driver
2025-03-27
Nuisance dust, total, <1% Qtz
0
10
0.00
Backhoe Operator
2009-11-19
Quartz, respirable, >1% Qtz
0.28
1.59
0.18
Cleanup Man
2005-05-04
Quartz, respirable, >1% Qtz
0.39
1.21
0.32
Front-end Loader Operator
2003-10-29
Respirable dust, <.1mg
0
Drill Helper
2003-10-29
Quartz, respirable, >1% Qtz
0.73
0.79
0.92
Cleanup Man
2002-05-22
Quartz, respirable, >1% Qtz
0.21
1.14
0.18
Cleanup Man
2002-05-22
Quartz, respirable, >1% Qtz
0.66
1.32
0.50
Backhoe Operator
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.
Cantera La Montaña recorded 0.00 reportable injury cases per 100 full-time workers in 2022.
Injury rate, 2022
ⓘ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 1.78 and the all-US-mining average was 2.12 cases per 100 workers.
In Puerto Rico, metal and nonmetal mining averaged 2.17 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
2022 *
0.00
0.00
0.000
2013 *
0.00
0.00
0.000
2012 *
13.71
13.71
0.000
2011 *
6.71
6.71
0.000
2010 *
6.12
0.00
0.000
2009 *
0.00
0.00
0.000
2008 *
0.00
0.00
0.000
2007 *
34.48
17.24
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
11
2025
11
2024
11
2023
12
2022
13
2021
11
2020
10
2019
10
2018
10
2017
8
2016
10
2015
11
2014
11
2013
15
2012
18
2011
19
2010
22
2009
21
2008
18
2007
19
2006
21
2005
17
2004
17
2003
14
2002
14
2001
10
2000
6
Source: MSHA quarterly employment and production, updated weekly.
Cantera La Montaña sits in Aguadilla 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.
Aguadilla Municipio, Puerto Rico · Population 54,486
0.0%
Mining share of county employment
$19,826
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
3,493
0
0
0.0
2026 Q1
3,719
1
0
268.9
2025 Q4
4,446
0
0
0.0
2025 Q3
4,523
0
0
0.0
2025 Q2
4,310
2
0
464.0
2025 Q1
4,262
2
1
469.3
2024 Q4
4,957
0
0
0.0
2024 Q3
5,451
3
0
550.4
Show 97 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
5,136
0
0
0.0
2023 Q4
4,401
0
0
0.0
2023 Q3
3,929
6
2
1527.1
2023 Q2
5,868
0
0
0.0
2023 Q1
5,622
3
0
533.6
2022 Q4
4,810
0
0
0.0
2022 Q3
5,851
1
0
170.9
2022 Q2
5,623
0
0
0.0
2022 Q1
6,026
1
0
165.9
2021 Q4
4,742
0
0
0.0
2021 Q3
4,938
0
0
0.0
2021 Q2
4,362
3
1
687.8
2021 Q1
4,356
4
1
918.3
2020 Q4
3,144
0
0
0.0
2020 Q3
4,003
2
1
499.6
2020 Q2
1,498
0
0
0.0
2020 Q1
3,611
2
0
553.9
2019 Q4
4,776
1
1
209.4
2019 Q3
3,171
2
0
630.7
2019 Q2
4,065
0
0
0.0
2019 Q1
4,180
3
0
717.7
2018 Q4
3,732
0
0
0.0
2018 Q3
4,065
0
0
0.0
2018 Q2
4,110
4
1
973.2
2018 Q1
3,912
3
1
766.9
2017 Q4
2,320
0
0
0.0
2017 Q3
2,038
0
0
0.0
2017 Q2
3,599
3
1
833.6
2017 Q1
4,446
4
1
899.7
2016 Q4
3,907
0
0
0.0
2016 Q3
4,628
3
1
648.2
2016 Q2
4,763
0
0
0.0
2016 Q1
4,863
6
1
1233.8
2015 Q4
4,840
0
0
0.0
2015 Q3
4,683
1
0
213.5
2015 Q2
4,147
0
0
0.0
2015 Q1
5,187
1
0
192.8
2014 Q4
4,262
0
0
0.0
2014 Q3
4,609
3
1
650.9
2014 Q2
4,523
1
0
221.1
2014 Q1
4,627
0
0
0.0
2013 Q4
4,382
1
0
228.2
2013 Q3
4,946
0
0
0.0
2013 Q2
5,338
1
0
187.3
2013 Q1
7,457
5
1
670.5
2012 Q4
8,063
0
0
0.0
2012 Q3
6,753
0
0
0.0
2012 Q2
6,934
7
3
1009.5
2012 Q1
7,423
1
0
134.7
2011 Q4
7,100
0
0
0.0
2011 Q3
8,415
0
0
0.0
2011 Q2
6,603
2
0
302.9
2011 Q1
7,672
3
1
391.0
2010 Q4
7,178
0
0
0.0
2010 Q3
7,517
1
0
133.0
2010 Q2
8,994
0
0
0.0
2010 Q1
9,005
0
0
0.0
2009 Q4
9,235
3
2
324.9
2009 Q3
8,914
3
3
336.5
2009 Q2
7,732
0
0
0.0
2009 Q1
8,570
0
0
0.0
2008 Q4
6,539
3
2
458.8
2008 Q3
7,532
0
0
0.0
2008 Q2
8,485
4
1
471.4
2008 Q1
7,438
2
0
268.9
2007 Q4
7,780
0
0
0.0
2007 Q3
7,704
0
0
0.0
2007 Q2
8,924
0
0
0.0
2007 Q1
10,394
2
1
192.4
2006 Q4
9,355
0
0
0.0
2006 Q3
8,563
0
0
0.0
2006 Q2
9,697
2
1
206.2
2006 Q1
9,696
0
0
0.0
2005 Q4
8,079
3
1
371.3
2005 Q3
7,585
1
0
131.8
2005 Q2
8,223
1
0
121.6
2005 Q1
8,237
0
0
0.0
2004 Q4
8,505
0
0
0.0
2004 Q3
8,720
0
0
0.0
2004 Q2
8,683
1
1
115.2
2004 Q1
5,608
0
0
0.0
2003 Q4
5,284
2
2
378.5
2003 Q3
6,080
3
3
493.4
2003 Q2
6,720
0
0
0.0
2003 Q1
5,000
4
2
800.0
2002 Q4
4,798
0
0
0.0
2002 Q3
5,664
0
0
0.0
2002 Q2
3,848
1
0
259.9
2002 Q1
5,321
6
3
1127.6
2001 Q4
4,240
0
0
0.0
2001 Q3
5,000
3
0
600.0
2001 Q2
3,772
4
3
1060.4
2001 Q1
2,889
2
2
692.3
2000 Q4
3,095
0
0
0.0
2000 Q3
3,010
3
3
996.7
2000 Q2
2,430
0
0
0.0
2000 Q1
450
3
1
6666.7
No fatalities recorded at this mine.
Reportable incidents
19 on file
2012 · 2 incidents
May 1, 2012PR · Metal/Non-Metalprep plant foreman, supervisor, mill plant supervisor, kiln supervisorHANDLING OF MATERIALS
Cantera La Cadena Inc · Caught in, under or between a moving and a stationary object
El empleado se encontraba linprando le correa de la procesadora, se pillo el dedo indice de la mano izguierda con una piedra. Al momento de la limpieza la planta encontraba apagada. (The employee was cleaning the processing plant belt; he got his left hand index finger with a rock. When cleaning, the plant is shut off).
March 26, 2012PR · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techOTHER
Dolor agudo en la mano derecha que le coge los de dos indice y pulgar con adormecimiento e hinchazon. (Acute pain on the right hand that reaches the index and thumb fingers with numbness and swelling).
2011 · 1 incident
October 25, 2011PR · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techSLIP OR FALL OF PERSON
The miner was cutting steel plates. When he moved a steel plate it slipped and pinched his right hand index finger causing a contusion to the finger.
2007 · 6 incidents
December 12, 2007PR · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS
While he was tightening a bolt, he added a tube to the extension handle to add strength. The handle slipped and hit him on the small finger of the right hand.
EE was polishing a bank of D-9 equipment with a polisher and got particles of metal in his right eye. At the time of the incident, he had not put on his security glasses.
August 1, 2007PR · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS
While cleaning the area of the conveyor that was clogged, he felt a sharp pain on the bottom part of the back like a tear in the muscle. He was bent over for a long time.
March 7, 2007PR · Metal/Non-Metaldrill operatorOTHER
He was uncovering the grinder that was covered with rock. He was trying to break a rock with a small metal bar. When he put the bar towards the back of the grinder, the bar hit him under the left cheekbone causing a small wound. At the time of the accident, He was not wearing safety glasses.
March 25, 2006PR · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techSLIP OR FALL OF PERSON
THE MAINTENANCE WORKER WAS ON SOME STAIRS WHEN HE SLIPPED ON SOME HOT PIPES THAT THEY WERE WELDING TOGETHER. APPARENTLY HE FELL & THAT'S HOW HE GOT HIS INJURIES.
2005 · 2 incidents
June 10, 2005PR · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDTOOLS (NONPOWERED)
While trying to stop an oil leak he made a plug by using a handkerchief. He used a screwdriver to put more pressure on the handkerchief when it (the screwdriver) slipped producing a small wound on the left hand.
February 5, 2005PR · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS
They were hauling a tooth (on a piece of equipment) which was tied with a linked chain, while tightening (the grip) one of the links came apart and caused the chain to tangle around ee's left thigh and body.
June 25, 2004PR · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS
EMPLOYEE WAS LOOSENING A SCREW WHILE ADJUSTING THE TENSION ON THE JAW(OF THE CRUSHER). THIS SCREW SEPARATED FROM THE PIECE WHICH HOLDS THE SPRING IN PLACE HITTING HIM & CAUSED A LACERATION WITH CONTUSION ON THE RT.THIGH/LEG.
March 8, 2004PR · Metal/Non-Metalwelder (shop)MACHINERY
EE WAS WELDING A PIECE OF IRON. THERE WAS A GUST OF WIND AND A PARTICULATE (PARTICLE OF DUST)ENTERED RIGHT EYE. THIS PARTICLE PASSED THROUGH THE BACK OF WELDING MASK
EE HAD BEEN WORKING WITH A HEAVY SHOVEL IN THE TRUCK BED WHEN THE STICK PART OF THE SHOVEL CAME APART AND RESULTED IN HIS SLIPPING AND FALLING ON HIS RIGHT HAND.
2002 · 1 incident
October 21, 2002PR · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorSLIP OR FALL OF PERSON