Mining Incidents

OK and Hidden Treasure: 236 MSHA citations Metal/Non-Metal

Controlled by Horizon Corporation
Milford, Beaver County, UT  ·  Active
MSHA Mine ID: 4202431

OK and Hidden Treasure has $144K in proposed MSHA penalties and $8K outstanding across 4 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
19
Years on record
2014–2026
Latest incident
Feb 2026
Compliance record
MSHA citations since 2008
236
citations
63
significant & substantial
$143,507
proposed penalties
$135,570
paid to date
94% of proposed penalties paid to date, a $7,937 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2008
58
inspections on record
1,985
inspection hours
11.9
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.
236 citations across 1,985 inspection hours.
Source: MSHA inspections data, updated weekly.

OK and Hidden Treasure has $144K in proposed MSHA penalties and $8K outstanding across 4 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.
$144K
proposed penalties
$143K
current assessed
$136K
paid to date
$8K
outstanding
232 assessments are final orders; 4 contested dockets.
Of $6K in penalties contested before the Commission, $5K was upheld in final decisions.
As of the most recent assessment on 2026-04-15.
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.
27.0%
significant & substantial
7.7%
high negligence or reckless
27.0%
reasonably likely or greater
82.8%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 5.2% low, 87.1% moderate, 7.7% high, 0.0% reckless.
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.
7 citations taken to the federal commission · 3% of citations on record
  • Settled 6 · 86%
  • Stood as issued 1 · 14%
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 3 decided S&S contests · industry: 79%
6%
Penalty reduction in decided contests
$6K proposed, $5K 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 2015-09-16.
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.
Docket Decision Judge Year Proposed / upheld
WEST 2010-613M Settlement Pope II 2011 $4K → $4K
WEST 2015-0634 Settlement Manning 2016 $963 → $674
WEST 2015-0918 Settlement Lesnick 2016 $300 → $240
WEST 2010-614M Dismissal Pope II 2012 $285 → $285
Source: FMSHRC civil penalty dockets and decisions (public record), 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: 2026-04-16
24%
of limit-tested samples over the exposure limit
33
samples
17
limit-tested
Most sampled contaminants
  • Quartz, respirable, >1% Qtz144 over
  • Respirable dust, <.1mg8
  • Unlisted Particulate, respirable, <1% Qtz6
  • Arsenic dust1
Show the individual readings (54)
Date Contaminant Concentration Limit Conc / limit Occupation
2025-02-19 Quartz, respirable, >1% Qtz 1.92 1.79 1.07 Crusher Oper/Worker
2015-09-30 Quartz, respirable, >1% Qtz 0.88 0.83 1.06 Sampler, Dust
2015-08-25 Quartz, respirable, >1% Qtz 4.8 0.56 8.57 Sampler, Dust
2015-07-14 Quartz, respirable, >1% Qtz 6.66 0.89 7.48 Sampler, Dust
2026-04-16 Quartz, respirable, >1% Qtz 0.23 Crusher Oper/Worker
2026-04-16 Respirable dust, <.1mg 0 Front-end Loader Operator
2026-04-16 Quartz, respirable, >1% Qtz 0.35 1.54 0.23 Crusher Oper/Worker
2025-02-19 Quartz, respirable, >1% Qtz 0.8 0.99 0.81 Sampler, Dust
2025-02-19 Quartz, respirable, >1% Qtz 0.46 1.47 0.31 Laborer, Bullgang
2025-02-19 Quartz, respirable, >1% Qtz 0.21 1.19 0.18 Crusher Oper/Worker
2025-02-19 Quartz, respirable, >1% Qtz 0.74 1.89 0.39 Crusher Oper/Worker
2018-10-16 Respirable dust, <.1mg 0 Truck Driver
2018-10-16 Respirable dust, <.1mg 0 Shovel Operator
2018-10-16 Respirable dust, <.1mg 0 Tractor Operator
2018-04-25 Beryllium dust 0 2 0.00 Utility Man
2018-04-25 Arsenic dust 0 500 0.00 Utility Man
2018-04-25 Cadmium dust & salts 0 200 0.00 Utility Man
2018-04-25 Chromium, soluble 3.02 500 0.01 Utility Man
2018-04-25 Cobalt dust 0 100 0.00 Utility Man
2018-04-25 Copper dust and mist 0.07 1 0.07 Utility Man
2018-04-25 Lead, inorganic dust 0 150 0.00 Utility Man
2018-04-25 Manganese dust 0 5 0.00 Utility Man
2018-04-25 Molybdenum dust 0 10 0.00 Utility Man
2018-04-25 Nickel dust & salts 0 1 0.00 Utility Man
2018-04-25 Vanadium dust 0 500 0.00 Utility Man
2016-02-09 Unlisted Particulate, respirable, <1% Qtz 0.18 Flotation/Concentrator Oper.
2016-02-09 Quartz, respirable, >1% Qtz 0.34 2.22 0.15 Sampler, Dust
2016-02-09 Unlisted Particulate, respirable, <1% Qtz 0.22 Flotation/Concentrator Oper.
2015-07-14 Respirable dust, <.1mg 0 Flotation/Concentrator Oper.
2015-07-14 Respirable dust, <.1mg 0 Front-end Loader Operator
2015-07-14 Quartz, respirable, >1% Qtz 0.31 1.97 0.16 Sampler, Dust
2013-01-06 Quartz, respirable, >1% Qtz 0.47 1.45 0.32 Drill Operator, Rotary
2013-01-06 Quartz, respirable, >1% Qtz 0.24 1.41 0.17 Drill Operator, Rotary
2013-01-06 Unlisted Particulate, respirable, <1% Qtz 0.52 Laborer, Bullgang
2013-01-06 Unlisted Particulate, respirable, <1% Qtz 0.72 Flotation/Concentrator Oper.
2013-01-04 Chromium, insoluble 0 1 0.00 Welder, etc.
2013-01-04 Cadmium oxide fumes 0 100 0.00 Welder, etc.
2013-01-04 Beryllium fumes 0 2 0.00 Welder, etc.
2013-01-04 Arsenic fumes 0 500 0.00 Welder, etc.
2013-01-04 Respirable dust, <.1mg 0 Truck Driver
2013-01-04 Respirable dust, <.1mg 0 Front-end Loader Operator
2013-01-04 Cristobalite, respirable 0 Sampler, Dust
2013-01-04 Unlisted Particulate, respirable, <1% Qtz 0.27 Sampler, Dust
2013-01-04 Iron oxide fumes 0.21 10 0.02 Welder, etc.
2013-01-04 Molybdenum fumes 0 10 0.00 Welder, etc.
2013-01-04 Nickel fumes 0 1 0.00 Welder, etc.
2013-01-04 Vanadium fumes 0 50 0.00 Welder, etc.
2013-01-04 Zinc oxide fumes 0 5 0.00 Welder, etc.
2013-01-04 Manganese fumes 0.02 5 0.00 Welder, etc.
2013-01-04 Magnesium oxide fumes 0 10 0.00 Welder, etc.
2013-01-04 Lead fumes 0 150 0.00 Welder, etc.
2013-01-04 Copper fumes 2.05 100 0.02 Welder, etc.
2013-01-04 Unlisted Particulate, respirable, <1% Qtz 0.37 Sampler, Dust
2013-01-04 Cobalt fumes 0 100 0.00 Welder, etc.

Area samples (mill and shop air)

Last sampled: 2015-09-30, 10 years ago
1
samples
Show the individual readings (1)
Date Contaminant Concentration Limit Conc / limit Area sampled
2015-09-30 Quartz, respirable, >1% Qtz 0.17 MP LABORATORY
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.

OK and Hidden Treasure recorded 0.86 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.
0.86
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 1.92 cases per 100 workers that year.
Year total case rate days-away fatal
2025 0.86 0.00 0.000
2024 5.83 2.92 0.000
2023 * 9.48 0.00 0.000
2020 * 6.07 6.07 0.000
2019 * 0.00 0.00 0.000
2018 9.88 1.23 0.000
2017 0.00 0.00 0.000
2016 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.
Ownership history
  1. Western Utah Copper Company 2006 to 2011
  2. CS Mining, LLC 2011 to 2017
  3. Milford Mining Company Utah, LLC 2017 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 102
2025 103
2024 64
2023 11
2022 9
2021 8
2020 16
2019 50
2018 97
2017 78
2016 107
2015 189
2014 165
2013 168
2012 139
2010 31
2009 68
2008 8
Source: MSHA quarterly employment and production, updated weekly.

OK and Hidden Treasure sits in Beaver County, Utah, where the Census mining category is 0.8% 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.
Beaver County, Utah · Population 7,172
0.8%
Mining share of county employment
$85,603
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 56,651 11 0 194.2
2026 Q1 59,499 0 0 0.0
2025 Q4 64,627 9 0 139.3
2025 Q3 63,062 10 4 158.6
2025 Q2 58,507 10 3 170.9
2025 Q1 46,818 35 15 747.6
2024 Q4 46,195 3 3 64.9
2024 Q3 42,131 1 1 23.7
Show 57 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 30,267 1 0 33.0
2024 Q1 18,599 0 0 0.0
2023 Q4 10,839 3 0 276.8
2023 Q3 5,015 3 0 598.2
2023 Q2 2,312 1 0 432.5
2023 Q1 2,932 3 0 1023.2
2022 Q4 4,139 0 0 0.0
2022 Q3 4,980 0 0 0.0
2022 Q2 4,933 0 0 0.0
2022 Q1 4,161 0 0 0.0
2021 Q4 4,547 0 0 0.0
2021 Q3 3,779 0 0 0.0
2021 Q2 4,105 0 0 0.0
2021 Q1 3,911 0 0 0.0
2020 Q4 4,705 0 0 0.0
2020 Q3 4,104 0 0 0.0
2020 Q2 9,044 1 0 110.6
2020 Q1 15,092 0 0 0.0
2019 Q4 11,900 2 0 168.1
2019 Q3 14,670 0 0 0.0
2019 Q2 19,092 9 2 471.4
2019 Q1 43,585 13 1 298.3
2018 Q4 40,903 0 0 0.0
2018 Q3 51,349 0 0 0.0
2018 Q2 37,228 15 4 402.9
2018 Q1 32,533 0 0 0.0
2017 Q4 43,327 3 1 69.2
2017 Q3 39,197 0 0 0.0
2017 Q2 46,272 1 0 21.6
2017 Q1 33,227 0 0 0.0
2016 Q4 22,437 0 0 0.0
2016 Q3 14,855 0 0 0.0
2016 Q2 66,506 0 0 0.0
2016 Q1 99,384 7 4 70.4
2015 Q4 127,446 0 0 0.0
2015 Q3 109,208 2 0 18.3
2015 Q2 90,812 0 0 0.0
2015 Q1 104,048 5 2 48.1
2014 Q4 84,391 0 0 0.0
2014 Q3 92,078 13 2 141.2
2014 Q2 76,226 0 0 0.0
2014 Q1 84,799 1 0 11.8
2013 Q4 76,062 1 1 13.1
2013 Q3 89,998 0 0 0.0
2013 Q2 80,022 0 0 0.0
2013 Q1 87,328 0 0 0.0
2012 Q4 67,576 7 2 103.6
2010 Q3 2,112 0 0 0.0
2010 Q1 28,518 0 0 0.0
2009 Q4 45,576 7 3 153.6
2009 Q3 67,272 0 0 0.0
2009 Q2 53,394 0 0 0.0
2009 Q1 15,133 0 0 0.0
2008 Q4 7,260 0 0 0.0
2008 Q3 3,640 0 0 0.0
2008 Q2 3,650 0 0 0.0
2008 Q1 3,629 7 1 1928.9
No fatalities recorded at this mine.

Reportable incidents

19 on file

2026 · 1 incident

February 3, 2026 UT · Metal/Non-Metal water truck operator POWERED HAULAGE
Milford Mining Company Utah, LLC · Fall from machine

A water truck air hose burst & the brakes locked on while going down a dirt road, incline 5.35%. The driver thought the brakes weren't working. EE tried the foot pedal & air actuator & gearing down. Once in neutral EE could not get it back in gear. EE steered the truck off road and jumped while going around 15-20 mph. Driver strained EE's hamstring.

2025 · 1 incident

December 12, 2025 UT · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Milford Mining Company Utah, LLC · Struck against stationary object

Two workers were attempting to get a coupler off a plastic pipe. One worker's hands slipped as they tried to turn the coupler and their left ring finger hit a pipeline component or the pipe wrench causing two cuts to this finger. Sutures were applied.

2024 · 4 incidents

September 10, 2024 UT · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Milford Mining Company Utah, LLC · Over-exertion (Not Elsewhere Classified)

On 9/24/24 EE reported hand was hurting. Right palm under EE's middle finger looking faintly bruised. EE stated was not positive but thought it was from using the impact wrench working on the tails feed system. On 9/24/24 EE asked to go into the doctor for an evaluation. We did not receive a release until end of day 9/25/24 stating Ee needed to be on light duty.

July 4, 2024 UT · Metal/Non-Metal quality control technician, laboratory technician, laboratory assistant MACHINERY
Milford Mining Company Utah, LLC · Struck by flying object

While preparing a cathode sample for analysis using the lathe when a piece of copper flew off and cut the technicians lip. Tech was taken to the hospital and received one suture to close the cut up.

May 24, 2024 UT · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Milford Mining Company Utah, LLC · Fall to lower level, (Not Elsewhere Classified)

Employee was washing down under CCD's. Employee was spraying down material to the sump area and was standing on a pipe when employee slipped off and twisted left knee. Employee went home for the remainder of that day and the following due to the knee being sore.

January 15, 2024 UT · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Milford Mining Company Utah, LLC · Over-exertion (Not Elsewhere Classified)

Employee had parked the forklift and exited the forklift. EE started walking down a slight incline and slipped on ice causing EE to do a front/back split with EE's legs. this caused a strain to EE's right groin area, creating a lot of pain.

2023 · 1 incident

October 3, 2023 UT · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Milford Mining Company Utah, LLC · Rubbed or abraded

Employee was cleaning off a 25' tape measure & trying to get it to roll back up. The tape measure was getting stuck when rolling back up. The tape measure suddenly started to roll up & cut vertically across the top pad of the right thumb. EE cleaned & bandaged their thumb & went back to work. Later they went to the ER received 5 sutures.

2020 · 1 incident

March 31, 2020 UT · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator SLIP OR FALL OF PERSON
Milford Mining Company Utah, LLC · Fall to the walkway or working surface

Stepped back during conversation with co-worker. Tripped on batteries. Tried to regain footing but rolled ankle. Broke right fibula, cracked right tibia and partially dislocated ankle.

2018 · 8 incidents

October 8, 2018 UT · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Milford Mining Company Utah, LLC · Struck by... (Not Elsewhere Classified)

Moving a hose clamp without gloves, working alone, and wet conditions existed.

June 6, 2018 UT · Metal/Non-Metal ball/rod/pebble/hand/limestone/dry mill operator, roller operator HANDTOOLS (NONPOWERED)
Milford Mining Company Utah, LLC · Caught in, under or between a moving and a stationary object

Victim was finishing putting pipe on ball mill discharge sump. The victim was prying on flow meter with pry bar to finish bolting gasket. Pry bar came loose and smashed finger between it and guard.

May 27, 2018 UT · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman SLIP OR FALL OF PERSON
Milford Mining Company Utah, LLC · Over-exertion (Not Elsewhere Classified)

Victim was shoveling and lifted the bucket of dirt. The walk way had loose gravel and the victim slipped and twisted their back.

May 18, 2018 UT · Metal/Non-Metal driller, highwall operator, highwall drill operator MACHINERY
Milford Mining Company Utah, LLC · Caught in, under or between a moving and a stationary object

Victim was trying to tighten a hydrolic hose. EE stepped up to arm of rod handler, rested EE's hand on the black of the cylinder while it was separated. There was miscommunication about what to lower. The whole cylinder got lowered instead of the tram. Top block smashed EE's resting hand.

May 17, 2018 UT · Metal/Non-Metal electrician, lineman HANDLING OF MATERIALS
Milford Mining Company Utah, LLC · Caught in, under or between a moving and a stationary object

Individual was placing a sump pump near ball mill 4, placed hand in a pinch point. Resulted in smashing left index finger.

May 11, 2018 UT · Metal/Non-Metal assayer, geologist, metallurgist, engineer, engineer management MACHINERY
Milford Mining Company Utah, LLC · Struck by... (Not Elsewhere Classified)

Individual did an improper release of a drone, resulting in a laceration from propeller on the tip of right thumb.

April 11, 2018 UT · Metal/Non-Metal quality control technician, laboratory technician, laboratory assistant HANDLING OF MATERIALS
Milford Mining Company Utah, LLC · Struck against stationary object

Individual was washing a beaker that had a chip in the top. Resulted in a laceration on hand between thumb and index finger.

2015 · 2 incidents

November 12, 2015 UT · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
CS Mining, LLC · Struck by... (Not Elsewhere Classified)

Employee was attempting to cut rubber conveyor belt with a razor knife when his hand slipped causing a laceration to the palm of his right hand. The employee was wearing leather work gloves.

May 20, 2015 UT · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
CS Mining, LLC · Struck by... (Not Elsewhere Classified)

Employee was grinding plate metal when the grinder kicked and cut his leg right above the knee (right)

2014 · 1 incident

May 22, 2014 UT · Metal/Non-Metal outside foreman, leadman SLIP OR FALL OF PERSON
CS Mining, LLC · Fall to the walkway or working surface

Walking from point A to point B, and tripped on blast cord that was covered in dust.