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: 890 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
MONA PIT has $20K 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.
$20K
proposed penalties
$20K
current assessed
$20K
paid to date
$0
outstanding
96 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2025-12-09.
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.
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: 2025-04-23
0%
of limit-tested samples over the exposure limit
26
samples
12
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz13
Respirable dust, <.1mg13
Show the individual readings (26)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2025-04-23
Quartz, respirable, >1% Qtz
0.33
0.85
0.39
Laborer, Bullgang
2025-04-23
Quartz, respirable, >1% Qtz
0.57
1.1
0.52
Front-end Loader Operator
2025-04-23
Quartz, respirable, >1% Qtz
0.16
Crusher Oper/Worker
2025-04-23
Respirable dust, <.1mg
0
Front-end Loader Operator
2021-01-11
Quartz, respirable, >1% Qtz
0.42
0.55
0.76
Laborer, Bullgang
2021-01-11
Respirable dust, <.1mg
0
Front-end Loader Operator
2018-01-10
Respirable dust, <.1mg
0
Crusher Oper/Worker
2018-01-10
Respirable dust, <.1mg
0
Front-end Loader Operator
2014-04-09
Quartz, respirable, >1% Qtz
0.22
0.62
0.35
Laborer, Bullgang
2014-04-09
Respirable dust, <.1mg
0
Front-end Loader Operator
2010-04-27
Respirable dust, <.1mg
0
Bulldozer Operator
2010-04-27
Respirable dust, <.1mg
0
Front-end Loader Operator
2010-04-27
Quartz, respirable, >1% Qtz
0.15
0.66
0.23
Front-end Loader Operator
2010-04-27
Respirable dust, <.1mg
0
Laborer, Bullgang
2009-09-29
Quartz, respirable, >1% Qtz
0.38
0.57
0.67
Laborer, Bullgang
2009-09-29
Respirable dust, <.1mg
0
Front-end Loader Operator
2009-09-29
Respirable dust, <.1mg
0
Bulldozer Operator
2009-09-29
Respirable dust, <.1mg
0
Front-end Loader Operator
2006-04-13
Respirable dust, <.1mg
0
Bulldozer Operator
2006-04-13
Respirable dust, <.1mg
0
Crusher Oper/Worker
2006-04-13
Quartz, respirable, >1% Qtz
0.27
0.54
0.50
Cleanup Man
2000-10-25
Quartz, respirable, >1% Qtz
0.15
0.87
0.17
Supervisor, Co. Official
2000-10-25
Quartz, respirable, >1% Qtz
0.43
0.57
0.75
Laborer, Bullgang
2000-10-25
Quartz, respirable, >1% Qtz
0.17
0.65
0.26
Front-end Loader Operator
2000-10-25
Quartz, respirable, >1% Qtz
0.15
0.85
0.18
Dry Screen Plant Operator
2000-10-25
Quartz, respirable, >1% Qtz
0.14
0.82
0.17
Front-end Loader Operator
Area samples (mill and shop air)
Last sampled: 2010-04-27, 16 years ago
1
samples
Show the individual readings (1)
Date
Contaminant
Concentration
Limit
Conc / limit
Area sampled
2010-04-27
Unlisted Particulate, total, <1% Qtz
0
SF Active Mining
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.
MONA PIT recorded 0.00 reportable injury cases per 100 full-time workers in 2025.
Injury rate, 2025
ⓘ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 1.65 and the all-US-mining average was 1.97 cases per 100 workers.
In Utah, metal and nonmetal mining averaged 1.89 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
2025 *
0.00
0.00
0.000
2024 *
6.74
0.00
0.000
2023 *
0.00
0.00
0.000
2022 *
5.33
0.00
0.000
2021 *
0.00
0.00
0.000
2020 *
0.00
0.00
0.000
2006 *
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
14
2025
12
2024
12
2023
10
2022
13
2021
10
2020
9
2019
8
2018
7
2017
6
2016
4
2014
4
2013
4
2012
5
2011
6
2010
7
2009
7
2008
8
2007
9
2006
8
2005
7
2004
5
2003
5
2002
4
2001
5
2000
4
Source: MSHA quarterly employment and production, updated weekly.
MONA PIT sits in Juab County, Utah, where the Census mining category is 1.2% 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.
Juab County, Utah · Population 12,273
1.2%
Mining share of county employment
$89,803
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
7,694
0
0
0.0
2026 Q1
6,920
0
0
0.0
2025 Q4
9,467
4
1
422.5
2025 Q3
7,538
0
0
0.0
2025 Q2
7,570
3
1
396.3
2025 Q1
7,454
0
0
0.0
2024 Q4
8,104
4
0
493.6
2024 Q3
7,396
2
0
270.4
Show 91 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
8,888
0
0
0.0
2024 Q1
5,265
1
0
189.9
2023 Q4
8,116
0
0
0.0
2023 Q3
8,720
0
0
0.0
2023 Q2
5,641
3
0
531.8
2023 Q1
5,724
0
0
0.0
2022 Q4
8,682
4
0
460.7
2022 Q3
9,874
0
0
0.0
2022 Q2
8,609
4
0
464.6
2022 Q1
10,385
2
0
192.6
2021 Q4
8,480
0
0
0.0
2021 Q3
7,015
0
0
0.0
2021 Q2
6,206
4
0
644.5
2021 Q1
4,579
4
2
873.6
2020 Q4
5,112
0
0
0.0
2020 Q3
5,784
1
1
172.9
2020 Q2
5,334
0
0
0.0
2020 Q1
3,939
4
1
1015.5
2019 Q4
5,385
0
0
0.0
2019 Q3
4,839
0
0
0.0
2019 Q2
4,602
0
0
0.0
2019 Q1
2,710
3
0
1107.0
2018 Q4
4,596
0
0
0.0
2018 Q3
4,379
0
0
0.0
2018 Q2
3,507
2
1
570.3
2018 Q1
2,035
0
0
0.0
2017 Q4
3,286
0
0
0.0
2017 Q3
4,068
0
0
0.0
2017 Q2
4,246
4
0
942.1
2017 Q1
2,048
3
0
1464.8
2016 Q4
2,791
0
0
0.0
2014 Q4
1,629
0
0
0.0
2014 Q3
2,306
0
0
0.0
2014 Q2
2,950
0
0
0.0
2014 Q1
1,615
0
0
0.0
2013 Q4
2,216
0
0
0.0
2013 Q3
856
0
0
0.0
2013 Q2
2,491
0
0
0.0
2013 Q1
1,103
0
0
0.0
2012 Q4
2,356
0
0
0.0
2012 Q3
2,918
0
0
0.0
2012 Q2
2,447
5
2
2043.3
2012 Q1
2,011
0
0
0.0
2011 Q4
2,665
2
1
750.5
2011 Q3
3,094
1
0
323.2
2011 Q2
2,943
0
0
0.0
2011 Q1
1,284
0
0
0.0
2010 Q4
2,377
0
0
0.0
2010 Q3
3,213
0
0
0.0
2010 Q2
3,263
2
0
612.9
2010 Q1
1,635
1
0
611.6
2009 Q4
2,788
0
0
0.0
2009 Q3
3,486
3
1
860.6
2009 Q2
3,613
0
0
0.0
2009 Q1
2,624
0
0
0.0
2008 Q4
3,792
0
0
0.0
2008 Q3
5,028
0
0
0.0
2008 Q2
5,363
0
0
0.0
2008 Q1
5,149
0
0
0.0
2007 Q4
4,711
0
0
0.0
2007 Q3
4,802
2
1
416.5
2007 Q2
6,307
0
0
0.0
2007 Q1
4,006
0
0
0.0
2006 Q4
5,319
2
0
376.0
2006 Q3
5,960
0
0
0.0
2006 Q2
5,780
2
0
346.0
2006 Q1
6,928
0
0
0.0
2005 Q4
5,581
1
0
179.2
2005 Q3
5,340
0
0
0.0
2005 Q2
5,037
2
0
397.1
2005 Q1
3,628
0
0
0.0
2004 Q4
4,070
0
0
0.0
2004 Q3
3,619
0
0
0.0
2004 Q2
3,412
4
2
1172.3
2004 Q1
2,716
0
0
0.0
2003 Q4
2,444
0
0
0.0
2003 Q3
2,574
0
0
0.0
2003 Q2
3,044
0
0
0.0
2003 Q1
2,502
0
0
0.0
2002 Q4
2,813
0
0
0.0
2002 Q3
2,745
0
0
0.0
2002 Q2
3,201
1
0
312.4
2002 Q1
2,273
0
0
0.0
2001 Q4
3,070
2
0
651.5
2001 Q3
3,112
0
0
0.0
2001 Q2
3,299
0
0
0.0
2001 Q1
2,653
0
0
0.0
2000 Q4
3,141
0
0
0.0
2000 Q3
2,001
0
0
0.0
2000 Q2
3,790
5
2
1319.3
2000 Q1
2,888
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
9 on file
2024 · 1 incident
July 1, 2024UT · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanHANDLING OF MATERIALS
EE was hosing out bottom pan of sand screen using fire hose standing on A frame ladder. ladder came out from under them causing them to fall and strike left shin on ladder. left shin received stitches
2022 · 1 incident
August 8, 2022UT · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorHANDTOOLS (NONPOWERED)
While changing a cone liner employee went around the hand rail to bar the ring gear. He slipped and fell 10 feet, landed on his feet and broke 1 leg and cracked the heel on his other leg.
Westroc, Inc. · Struck by... (Not Elsewhere Classified)
Employee was pushing cone motor to tighten the v-belt with a porta-power. As it got tight the ram jumped out. EE used hand to stop it from hitting me in another place.
May 27, 2005UT · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorSTRIKING OR BUMPING
Employee started up the ladder to the screen deck, caught his forehead on the overflow pipe that comes from the screw to the sump tank, causing whiplash.
2004 · 1 incident
September 29, 2004UT · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS
Westroc, Inc. · Caught in, under or between (Not Elsewhere Classified)
Employee was changing out the seat in the dozer and it smashed the fingers on his right hand when he dropped his end.
2003 · 1 incident
July 9, 2003UT · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techMACHINERY
EE WAS CHANGING SEGMENTS ON A LOADER BUCKET AND CUT THE INDEX FINGER OF HIS RIGHT HAND ON A BOLT HEAD THAT HAD BEEN FILED TO SHARP EDGE FROM WEAR.
1999 · 2 incidents
October 8, 1999UT · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorHANDTOOLS (NONPOWERED)
Westroc, Inc. · Struck by... (Not Elsewhere Classified)
PUTTING A BEARING ON THE TAIL PULLEY CONE UNDER BELT WITH A 8 LB HAMMER. HE MISSED BEARING HITTING HIS FINGER BETWEEN THE HAMMER HANDLE AND THE FRAME ON THE CONE.
April 29, 1999UT · Metal/Non-Metalbeltman, conveyor man, conveyor belt worker, mobile bridge carrierman, feeder operator, conveyor riderPOWERED HAULAGE
Westroc, Inc. · Caught in, under or between (Not Elsewhere Classified)
WHILE ADJUSTING FEEDER TRAY THE SUSPENDING BOLT BROKE MAKING EE LOST HIS BALANCE & HAVEING LEFT HAND SLIDE IN BETWEEN THE FEEDER TRAY & THE TRAPPLATE CRUSHING FINGERS #3 & #4 FINGERS ON LEFT HAND