Mining Incidents

Isabella Pearl Mine: 71 MSHA citations Metal/Non-Metal

Luning, Mineral County, NV  ·  Active
MSHA Mine ID: 2602812

Isabella Pearl Mine has $14K in proposed MSHA penalties and $151 outstanding across 3 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
17
Years on record
2019–2025
Latest incident
Sep 2025
Compliance record
MSHA citations since 2018
71
citations
6
significant & substantial
$13,935
proposed penalties
$12,129
paid to date
87% of proposed penalties paid to date, a $1,806 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2018
27
inspections on record
719
inspection hours
n/a
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: 719 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Isabella Pearl Mine has $14K in proposed MSHA penalties and $151 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.
$14K
proposed penalties
$12K
current assessed
$12K
paid to date
$151
outstanding
71 assessments are final orders; 3 contested dockets.
Of $3K in penalties contested before the Commission, $1K was upheld in final decisions.
As of the most recent assessment on 2026-04-30.
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.
8.5%
significant & substantial
8.5%
high negligence or reckless
8.5%
reasonably likely or greater
26.8%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 39.4% low, 52.1% moderate, 8.5% 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.
3 citations taken to the federal commission · 4% of citations on record
  • Settled 2 · 67%
  • Stood as issued 1 · 33%
50%
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%
61%
Penalty reduction in decided contests
$3K 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 2023-05-24.
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 2023-0247 Settlement Manning 2023 $1K → $328
WEST 2021-0055 Settlement Simonton 2021 $941 → $421
WEST 2019-0323 Default McCarthy 2019 $319 → $319
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: 2026-04-30
0%
of limit-tested samples over the exposure limit
7
samples
3
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg4
  • Quartz, respirable, >1% Qtz2
  • Lead, inorganic dust1
Show the individual readings (7)
Date Contaminant Concentration Limit Conc / limit Occupation
2026-04-30 Respirable dust, <.1mg 0 Front-end Loader Operator
2026-04-30 Quartz, respirable, >1% Qtz 0.23 0.96 0.24 Crusher Oper/Worker
2023-07-26 Lead, inorganic dust 4 150 0.03 Lab Technician
2021-05-03 Respirable dust, <.1mg 0 Crusher Oper/Worker
2021-05-03 Quartz, respirable, >1% Qtz 0.26 0.74 0.35 Crusher Oper/Worker
2018-08-09 Respirable dust, <.1mg 0 Front-end Loader Operator
2018-08-09 Respirable dust, <.1mg 0 Truck Driver

Area samples (mill and shop air)

Last sampled: 2023-07-26, 3 years ago
7
samples
Show the individual readings (7)
Date Contaminant Concentration Limit Conc / limit Area sampled
2023-07-26 LEAD (WIPE) 0 MP LABORATORY
2023-07-26 LEAD (WIPE) 0 MP LABORATORY
2023-07-26 LEAD (WIPE) 0 MP LABORATORY
2023-07-26 LEAD (WIPE) 0 MP LABORATORY
2023-07-26 LEAD (WIPE) 0 MP LABORATORY
2023-07-26 LEAD (WIPE) 0 MP LABORATORY
2023-07-26 LEAD (WIPE) 0 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.

Isabella Pearl Mine recorded 2.42 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.
2.42
total case rate
0.00
days-away rate
0.000
fatality rate
Above 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 Nevada, metal and nonmetal mining averaged 1.25 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 * 2.42 0.00 0.000
2024 * 0.00 0.00 0.000
2023 1.78 0.00 0.000
2022 0.00 0.00 0.000
2021 1.78 0.00 0.000
2020 1.43 0.00 0.000
2019 * 4.11 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. Walker Lane Minerals Corp 2018 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 71
2025 65
2024 61
2023 69
2022 64
2021 63
2020 55
2019 47
2018 24
Source: MSHA quarterly employment and production, updated weekly.

Isabella Pearl Mine sits in Mineral County, Nevada, where the Census mining category is 6.2% 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.
Mineral County, Nevada · Population 4,557
6.2%
Mining share of county employment
$50,584
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 29,122 6 0 206.0
2026 Q1 29,722 5 0 168.2
2025 Q4 8,879 0 0 0.0
2025 Q3 22,696 0 0 0.0
2025 Q2 26,528 2 0 75.4
2025 Q1 24,689 0 0 0.0
2024 Q4 25,046 2 0 79.9
2024 Q3 23,124 1 0 43.2
Show 24 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 24,702 0 0 0.0
2024 Q1 23,125 0 0 0.0
2023 Q4 27,990 2 0 71.5
2023 Q3 28,316 0 0 0.0
2023 Q2 26,762 0 0 0.0
2023 Q1 29,031 2 0 68.9
2022 Q4 24,409 0 0 0.0
2022 Q3 26,551 0 0 0.0
2022 Q2 25,855 5 1 193.4
2022 Q1 27,405 0 0 0.0
2021 Q4 27,296 5 1 183.2
2021 Q3 25,405 0 0 0.0
2021 Q2 30,740 0 0 0.0
2021 Q1 28,808 2 0 69.4
2020 Q4 39,754 0 0 0.0
2020 Q3 30,709 7 1 227.9
2020 Q2 36,611 0 0 0.0
2020 Q1 32,589 0 0 0.0
2019 Q4 29,503 1 0 33.9
2019 Q3 27,020 0 0 0.0
2019 Q2 24,074 0 0 0.0
2019 Q1 16,668 5 1 300.0
2018 Q4 11,099 0 0 0.0
2018 Q3 8,551 1 0 116.9
No fatalities recorded at this mine.

Reportable incidents

17 on file

2025 · 3 incidents

September 26, 2025 NV · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Walker Lane Minerals Corp · Caught in, under or between a moving and a stationary object

While positioning a drill shock sub to attach it to the drill head of a ZT44 drill, employee sustained a crushing injury to three of their left hand fingers. This was caused when the drill steel wrench closed on the employees fingers.

August 20, 2025 NV · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer OTHER
Walker Lane Minerals Corp · Unclassified, insufficient data

Haul Truck Operator mounted "Volvo R100 #17106 Truck. Appears to have had some sort of medical episode and was found deceased in cab of HT. Operator had not started equipment of Pre-Operational Check. Pending Autopsy of HT Operator.

June 20, 2025 NV · Metal/Non-Metal crusher attendant/operator, pan feeder operator/worker SLIP OR FALL OF PERSON
Walker Lane Minerals Corp · Fall from ladders

Employee was pressure washing the underside of the cone crusher. EE was utilizing a 5' ladder, the ladder shifted as EE was descending the ladder causing EE to lose EE's balance falling backwards off the ladder landing on EE's back. EE's left leg became entangled between the rungs of the ladder. Employee had a back contusion.

2024 · 1 incident

April 18, 2024 NV · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator POWERED HAULAGE
Walker Lane Minerals Corp · Struck against a moving object

A loader operator was loading haul trucks, when their bucket contacted a hard toe causing the machine to shake. This in turn caused discomfort in the operator's lower back.

2023 · 5 incidents

May 30, 2023 NV · Metal/Non-Metal miner, prospector, nec HANDTOOLS (NONPOWERED)
Walker Lane Minerals Corp · Struck by flying object

Employee was using 2 wrenches to tighten a bolt on a strip vessel. One of the wrenches slipped of the bolt and struck the employee on the upper lip. This caused a 1/4" laceration.

May 16, 2023 NV · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer POWERED HAULAGE
Walker Lane Minerals Corp · Struck against a moving object

Worker went to doctor with reaggravation from previous injury on 2/22/2023. Worker sought medical treatment on 5/16/2023 when off and contacted Manager with a note for restricted duties. Worker had previously been cleared for full duties from the 2/22/2023 injury.

May 13, 2023 NV · Metal/Non-Metal drill helper HANDTOOLS (NONPOWERED)
Walker Lane Minerals Corp · Caught in, under or between a moving and a stationary object

The employee swung a hammer, missed the target, and the momentum carried the swing beyond the target to the drill mast. The handle hit the mast cutting/pinching the employee's right index finger. The employee received three stitches at the emergency room, and the doctor cleared the employee for full duty.

April 18, 2023 NV · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver POWERED HAULAGE
Walker Lane Minerals Corp · Struck against a moving object

Haul truck experienced neck pain when getting loaded with ore. The injury was Tuesday but was first aid care. Employee went to the hospital on Wednesday and was given 2 days off work but ended up being Restricted work for two days of Thursday and Monday.

February 22, 2023 NV · Metal/Non-Metal utility man, shift tech, service/dump truck operator POWERED HAULAGE
Walker Lane Minerals Corp · Struck against a moving object

A haul truck operator was dumping a load at the crusher, and when the operator was lowering the truck bed, it caused a rocking motion which jarred the employee's back. Initially, first aid only. EE put on restrictions on 03/01/2023 making this reportable.

2021 · 2 incidents

June 15, 2021 NV · Metal/Non-Metal prep plant foreman, supervisor, mill plant supervisor, kiln supervisor HANDLING OF MATERIALS
Walker Lane Minerals Corp · Over-exertion in lifting objects

In the process of moving a length of 4 inch HDPE pipe, the employee lifted the pipe over EE's head and walked forward, employee lowered the pipe to the ground. An hour later the employee felt a pop and pain in the stomach and groin area.

February 11, 2021 NV · Metal/Non-Metal greaser, grease man, oiler, lube man, dragline oiler HANDTOOLS (NONPOWERED)
Walker Lane Minerals Corp · Struck by flying object

2 Employees were in the process of replacing a Lip Protector on a CAT 992 Loader. During the Process one employee grabbed a hammer and struck the tip of a tooth, to help engage the tooth. The tooth chipped and a piece of metal struck the employee on the left cheek imbedding metal in cheek.

2020 · 3 incidents

August 25, 2020 NV · Metal/Non-Metal belt foreman, maintenance foreman, maintenance supervisor POWERED HAULAGE
Walker Lane Minerals Corp · Caught in, under or between running or meshing objects

Attempting to clear a blockage of AN from the bed auger utilizing a pressure washer. The first maintenance worker asked the driver of the truck to test the auger, the second maintenance worker had opened the auger inspection door and reached inside as the driver started the auger. Resulting in Amputation to the Index & Middle Fingers from the second knuckle on the left hand.

July 6, 2020 NV · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver POWERED HAULAGE
Walker Lane Minerals Corp · Struck against a moving object

An operator of a CAT 777D Haul Truck was parked to be loaded by a CAT 992G Loader. The first bucket of material contained a large rock. When the bucket was loaded into the haul truck, the large rock caused the truck to shake. This caused the haul truck operator to experience neck pain.

May 24, 2020 NV · Metal/Non-Metal quality control technician, laboratory technician, laboratory assistant HANDLING OF MATERIALS
Walker Lane Minerals Corp · Over-exertion in lifting objects

While in the process of lifting a bag of silica sand for transfer into a bucket, a lab tech felt a sharp pain in right shoulder when they lifted the bag of sand.

2019 · 3 incidents

October 28, 2019 NV · Metal/Non-Metal miner, prospector, nec HANDLING OF MATERIALS
Walker Lane Minerals Corp · Over-exertion (Not Elsewhere Classified)

Worker states EE was gathering wear iron on the lower waste dump to stack onto wooden pallets. Worker states as EE attempted to move the fourth piece of wear iron it slipped out of EE's hands. The worker states EE attempted to catch the piece of iron with EE's left knee and felt a slight pinch in EE's lower back and pain in EE's knee.

May 31, 2019 NV · Metal/Non-Metal barge/boat/dredge/towbarge/towboat/leach operator, riverman, deck hand HANDTOOLS (NONPOWERED)
Walker Lane Minerals Corp · Struck by... (Not Elsewhere Classified)

Employee was in the process of cutting drip line on leach pad with a razor knife, while cutting the plastic line the knife slipped, making contact with the left forearm, causing a laceration to the forearm,requiring stiches to close.

April 19, 2019 NV · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator SLIP OR FALL OF PERSON
Walker Lane Minerals Corp · Fall onto or against objects

ADR operation tripped on a siding frame as EE walked into the plant falling forward, making contact with exposed edge of metal siding with right wrist, resulting in a laceration to the wrist. Laceration required 7 stiches.