While inspecting equipment at the crusher a foreign object entered left eye. Taken to ER and material was removed.
Moss Mine: 129 MSHA citations Metal/Non-Metal
Moss Mine has $44K in proposed MSHA penalties and $755 outstanding across 4 contested dockets, plus health sampling and the full incident record.
Watch this mine
Email me when a new MSHA incident is filed at Moss Mine.
- Fatalities
- 0
- Total incidents
- 22
- Years on record
- 2013–2026
- Latest incident
- Jun 2026
ⓘ
This rate is recorded citations divided by MSHA inspection hours, per 100 hours. It reflects inspection effort, not mine size or production.Moss Mine has $44K in proposed MSHA penalties and $755 outstanding across 4 contested dockets.
ⓘ
Differences between proposed and paid penalties reflect both settlements and conference reductions and amounts still owed. Outstanding is the balance currently owed.ⓘ
Shares are computed over citations that carry the MSHA gravity and negligence coding; a small share of records are uncoded.ⓘ
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.- Settled 1 · 50%
- Stood as issued 1 · 50%
ⓘ
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 Vacated and withdrawn citations, and settlements that removed the designation, count against.ⓘ
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.| Docket | Decision | Judge | Year | Proposed / upheld |
|---|---|---|---|---|
| WEST 2025-0308 | Settlement | Paez | 2025 | $10K → $10K |
| WEST 2025-0332 | Settlement | Simonton | 2026 | $10K → $10K |
| WEST 2021-0288 | Settlement | Miller | 2022 | $8K → $3K |
| WEST 2025-0342 | Default | 2025 | $336 → $336 |
ⓘ
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: 2026-07-14
ⓘ
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.- Quartz, respirable, >1% Qtz266 over
- Respirable dust, <.1mg8
- Lead, inorganic dust3
- Nuisance dust, respirable, <1% Qtz1
Show the individual readings (38)
| Date | Contaminant | Concentration | Limit | Conc / limit | Occupation |
|---|---|---|---|---|---|
| 2026-07-14 | Quartz, respirable, >1% Qtz | 1.49 | 0.61 | 2.44 | Cleanup Man |
| 2025-06-05 | Quartz, respirable, >1% Qtz | 0.9 | 0.68 | 1.32 | Crusher Oper/Worker |
| 2023-10-24 | Quartz, respirable, >1% Qtz | 0.72 | 0.58 | 1.24 | Utility Man |
| 2023-07-04 | Quartz, respirable, >1% Qtz | 1.05 | 0.66 | 1.59 | Cleanup Man |
| 2023-07-04 | Quartz, respirable, >1% Qtz | 0.96 | 0.7 | 1.37 | Cleanup Man |
| 2022-07-07 | Quartz, respirable, >1% Qtz | 0.91 | 0.7 | 1.30 | Crusher Oper/Worker |
| 2025-10-28 | Quartz, respirable, >1% Qtz | 0.39 | 0.7 | 0.56 | Crusher Oper/Worker |
| 2025-10-28 | Quartz, respirable, >1% Qtz | 0.3 | 0.76 | 0.39 | Crusher Oper/Worker |
| 2025-07-22 | Quartz, respirable, >1% Qtz | 0.16 | Crusher Oper/Worker | ||
| 2025-07-22 | Quartz, respirable, >1% Qtz | 0.94 | 1.37 | 0.69 | Crusher Oper/Worker |
| 2025-06-05 | Respirable dust, <.1mg | 0 | Crusher Oper/Worker | ||
| 2025-03-27 | Respirable dust, <.1mg | 0 | Utility Man | ||
| 2025-03-27 | Quartz, respirable, >1% Qtz | 0.13 | Utility Man | ||
| 2024-04-28 | Quartz, respirable, >1% Qtz | 0.28 | 0.64 | 0.44 | Utility Man |
| 2024-04-28 | Quartz, respirable, >1% Qtz | 0.31 | 0.64 | 0.48 | Cleanup Man |
| 2024-04-28 | Quartz, respirable, >1% Qtz | 0.45 | 0.64 | 0.70 | Cleanup Man |
| 2023-11-21 | Respirable dust, <.1mg | 0 | Utility Man | ||
| 2023-11-21 | Nuisance dust, respirable, <1% Qtz | 0.14 | 10 | 0.01 | Utility Man |
| 2023-11-21 | Quartz, respirable, >1% Qtz | 0.14 | Utility Man | ||
| 2023-10-24 | Quartz, respirable, >1% Qtz | 0.19 | 1.01 | 0.19 | Electrician |
| 2023-10-24 | Quartz, respirable, >1% Qtz | 0.29 | 0.67 | 0.43 | Utility Man |
| 2023-07-13 | Respirable dust, <.1mg | 0 | Truck Driver | ||
| 2023-04-26 | Quartz, respirable, >1% Qtz | 0.72 | 1.85 | 0.39 | Mobile Crane Operator |
| 2023-04-26 | Quartz, respirable, >1% Qtz | 0.48 | 0.7 | 0.69 | Laborer, Bullgang |
| 2022-09-28 | Quartz, respirable, >1% Qtz | 0.48 | 0.59 | 0.81 | Welder, etc. |
| 2022-09-28 | Quartz, respirable, >1% Qtz | 0.38 | Mechanic | ||
| 2022-09-28 | Quartz, respirable, >1% Qtz | 2.54 | 2.94 | 0.86 | Mechanic |
| 2022-07-07 | Quartz, respirable, >1% Qtz | 0.42 | 0.98 | 0.43 | Sampler, Dust |
| 2019-09-04 | Respirable dust, <.1mg | 0 | Truck Driver | ||
| 2019-09-04 | Quartz, respirable, >1% Qtz | 0.43 | Shovel Operator | ||
| 2019-09-04 | Respirable dust, <.1mg | 0 | Bulldozer Operator | ||
| 2019-09-04 | Quartz, respirable, >1% Qtz | 0.3 | 0.61 | 0.49 | Drill Operator, Rotary |
| 2018-08-21 | Lead, inorganic dust | 0 | 150 | 0.00 | Lab Technician |
| 2018-08-21 | Lead, inorganic dust | 0 | 150 | 0.00 | Lab Technician |
| 2018-08-21 | Lead, inorganic dust | 16.42 | 150 | 0.11 | Lab Technician |
| 2018-04-30 | Quartz, respirable, >1% Qtz | 0.25 | 0.76 | 0.33 | Lab Technician |
| 2018-04-30 | Respirable dust, <.1mg | 0 | Supervisor, Co. Official | ||
| 2017-01-18 | Respirable dust, <.1mg | 0 | Electrician |
Moss Mine recorded 0.00 reportable injury cases per 100 full-time workers in 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.| Year | total case rate | days-away | fatal |
|---|---|---|---|
| 2025 | 0.00 | 0.00 | 0.000 |
| 2024 | 0.00 | 0.00 | 0.000 |
| 2023 | 0.91 | 0.00 | 0.000 |
| 2022 | 1.36 | 1.36 | 0.000 |
| 2021 | 0.00 | 0.00 | 0.000 |
| 2020 | 0.00 | 0.00 | 0.000 |
| 2019 | 1.14 | 1.14 | 0.000 |
| 2018 | 1.33 | 0.00 | 0.000 |
- Harrison Mining 1987 to 2013
- Golden Vertex Corp 2013 to present
- Golden Vertex LLC 2025 to 2025
| Year | Employees |
|---|---|
| 2026 | 88 |
| 2025 | 69 |
| 2024 | 78 |
| 2023 | 104 |
| 2022 | 64 |
| 2021 | 97 |
| 2020 | 83 |
| 2019 | 80 |
| 2018 | 64 |
| 2017 | 20 |
| 2016 | 4 |
| 2014 | 15 |
| 2013 | 19 |
Moss Mine sits in Mohave County, Arizona, where the Census mining category is 0.7% of county employment.
ⓘ
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.ⓘ
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.| Quarter | Hours worked | Citations | S&S | Per 1M hrs |
|---|---|---|---|---|
| 2026 Q2 | 37,386 | 0 | 0 | 0.0 |
| 2026 Q1 | 43,630 | 1 | 0 | 22.9 |
| 2025 Q4 | 37,270 | 6 | 1 | 161.0 |
| 2025 Q3 | 34,762 | 0 | 0 | 0.0 |
| 2025 Q2 | 22,526 | 2 | 0 | 88.8 |
| 2025 Q1 | 15,928 | 7 | 1 | 439.5 |
| 2024 Q4 | 11,787 | 2 | 0 | 169.7 |
| 2024 Q3 | 33,866 | 0 | 0 | 0.0 |
Show 38 earlier quarters Hide earlier quarters
| Quarter | Hours worked | Citations | S&S | Per 1M hrs |
|---|---|---|---|---|
| 2024 Q2 | 41,854 | 10 | 3 | 238.9 |
| 2024 Q1 | 41,814 | 0 | 0 | 0.0 |
| 2023 Q4 | 62,051 | 5 | 2 | 80.6 |
| 2023 Q3 | 45,944 | 5 | 1 | 108.8 |
| 2023 Q2 | 71,193 | 8 | 4 | 112.4 |
| 2023 Q1 | 39,438 | 0 | 0 | 0.0 |
| 2022 Q4 | 47,853 | 4 | 0 | 83.6 |
| 2022 Q3 | 41,404 | 2 | 0 | 48.3 |
| 2022 Q2 | 20,473 | 0 | 0 | 0.0 |
| 2022 Q1 | 37,078 | 0 | 0 | 0.0 |
| 2021 Q4 | 80,073 | 0 | 0 | 0.0 |
| 2021 Q3 | 43,388 | 0 | 0 | 0.0 |
| 2021 Q2 | 37,079 | 2 | 0 | 53.9 |
| 2021 Q1 | 46,221 | 0 | 0 | 0.0 |
| 2020 Q4 | 51,074 | 0 | 0 | 0.0 |
| 2020 Q3 | 33,615 | 1 | 0 | 29.7 |
| 2020 Q2 | 40,556 | 5 | 0 | 123.3 |
| 2020 Q1 | 41,677 | 4 | 2 | 96.0 |
| 2019 Q4 | 47,699 | 3 | 0 | 62.9 |
| 2019 Q3 | 40,528 | 2 | 1 | 49.3 |
| 2019 Q2 | 44,996 | 0 | 0 | 0.0 |
| 2019 Q1 | 41,791 | 0 | 0 | 0.0 |
| 2018 Q4 | 47,439 | 0 | 0 | 0.0 |
| 2018 Q3 | 45,565 | 2 | 2 | 43.9 |
| 2018 Q2 | 32,619 | 0 | 0 | 0.0 |
| 2018 Q1 | 24,960 | 0 | 0 | 0.0 |
| 2017 Q4 | 13,718 | 1 | 0 | 72.9 |
| 2017 Q3 | 7,040 | 0 | 0 | 0.0 |
| 2017 Q2 | 4,422 | 0 | 0 | 0.0 |
| 2017 Q1 | 2,608 | 2 | 0 | 766.9 |
| 2016 Q4 | 1,820 | 0 | 0 | 0.0 |
| 2014 Q4 | 6,991 | 0 | 0 | 0.0 |
| 2014 Q3 | 8,414 | 1 | 0 | 118.8 |
| 2014 Q2 | 8,647 | 0 | 0 | 0.0 |
| 2014 Q1 | 10,723 | 1 | 0 | 93.3 |
| 2013 Q4 | 13,434 | 0 | 0 | 0.0 |
| 2013 Q3 | 11,798 | 0 | 0 | 0.0 |
| 2013 Q2 | 3,992 | 0 | 0 | 0.0 |
Reportable incidents
22 on file2026 · 2 incidents
EE was troubleshooting a motor on the autosampler. While attempting to actuate the brake, wires arced, causing an arc flash.
2025 · 2 incidents
Employee was attempting to remove an old tooth from a 988K CAT loader. Employee struck the tooth of the 988K with a hammer causing a sliver of metal to enter the employee's leg.
Employee was attempting to remove an old tooth from a 988K CAT loader. Employee struck the tooth of the 988K with a hammer causing a sliver of metal to enter the employee's leg.
2024 · 2 incidents
A loader operator was loading waste in the pit, when the bucket contacted a hard toe in the dig face that jarred the loader and the operator's back. The operator was taken to the hospital for evaluation and was diagnosed with trauma to their lumbar region.
A fuel and lube technician was dismounting a dozer. They were using 3-points of contact and as they placed their right foot on the ground, they felt a pain in their right knee and their knee gave out. The ground conditions were good.
2023 · 1 incident
Employee was working between cones one and two on the ground level on the ladder for CV1 zero speed on the belt. As EE was dismounting the ladder, EE snagged EE's harness on a Unistrut and continued down the ladder unaware EE has sustained a laceration.
2022 · 2 incidents
Employee was using a utility knife to cut a heavy hose. EE was cutting away from EE's body when the knife slipped and caught EE's right thumb. The laceration resulted in stitches.
EE fell while staking out ore control on rocks. EE slightly scratched lower left leg from the rock. EE stated when EE reported the incident to mine personnel on 6/22/22 that the scratch did not break the skin & EE didn't perform first-aid to clean wound. Miner sought medical treatment on 6/22/22 where EE was treated for a staph infection & MRSA. Miner is back to full duty as of 7/1
2020 · 3 incidents
Employee was raising mast on light plant when the cable broke inside the mast itself and employee jumped out of the way, banging left shin on the outrigger of the light plant causing a 1 inch laceration requiring one staple to close.
Employee was replacing a ripper tooth on a dozer and while striking the tooth to loosen it, a shard came off and entered EE's left leg just below the knee. It severed a vein and it required medical treatment to repair it.
Employee dropped a heel plate onto tip of right ring finger crushing the distal joint tissue.
2019 · 6 incidents
While entering the drill cab from the drill deck Employee slipped on the deck and landed on the door jam with their chest. Employee fractured #11 rib and was placed on modified duty.
After locking out the CV7 grasshopper. Employee climbed into the tail pulley area to start cleaning out the dirt. when there was a shift in the material and their leg got caught in a pinch point.
Mechanic was grinding off a stripped bolt when grinder jumped and struck left wrist causing a 1 - 1 1/2 inch cut which required sutures to close.
Employee slipped while dismounting a 10-wheel water truck and fell to ground fracturing a bone in EE's right wrist.
First hot day of season, an Oiler was changing filters on truck when they started feeling dizzy. Seen at ER where they were given 2 bags IV fluid for dehydration and released.
Truck driver strained back muscle while rolling rock out of the way.
2018 · 3 incidents
Employee was working on a blast pattern loading holes with 50 lb. bagged ANFO. Employee reported feeling like EE had thrown back out and upon subsequent medical evaluation, it was discovered EE had a mild compression fracture of the T-12 vertebrae.
Technician had unloaded engine with service truck crane and placed it on the ground. Was disconnecting hooks from engine. Had left hand on lifting hook and needed to reduce tension to release hook. Meant to push the hoist down button on crane control but hit the boom out increasing hook tension, pinching finger.
Worker was cutting the banding off the drip hose when the knife slipped and cut left forearm.
2013 · 1 incident
Experienced muscle cramps, vomiting, dehydration No loss of consciousness. Taking lisinopril for high blood pressure.