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: 117 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Thacker Pass has $1K 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.
$1K
proposed penalties
$1K
current assessed
$1K
paid to date
$0
outstanding
8 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2025-02-06.
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: 2026-07-20
0%
of limit-tested samples over the exposure limit
3
samples
1
limit-tested
Most sampled contaminants
Respirable dust, <.1mg2
Quartz, respirable, >1% Qtz1
Show the individual readings (3)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2026-07-20
Quartz, respirable, >1% Qtz
0.16
0.95
0.17
Rotary Bucket Ex. Operator
2026-07-20
Respirable dust, <.1mg
0
Truck Driver
2026-07-20
Respirable dust, <.1mg
0
Road Grader 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.
Thacker Pass 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
No reportable injury cases in any year shown. Employee-hours were reported in each of those years, so these are true zeros rather than missing data. Citations, listed in the compliance record above, are inspector-found violations and are counted separately from worker injuries.
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 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 *
0.00
0.00
0.000
2024 *
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
3
2025
21
2024
27
2023
2
2016
3
2015
2
2014
3
Source: MSHA quarterly employment and production, updated weekly.
Thacker Pass sits in Humboldt County, Nevada, where the Census mining category is 20.1% 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.
Humboldt County, Nevada · Population 17,299
20.1%
Mining share of county employment
$79,946
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
970
0
0
0.0
2026 Q1
2,671
0
0
0.0
2025 Q4
14,942
0
0
0.0
2025 Q3
12,280
0
0
0.0
2025 Q2
10,920
0
0
0.0
2025 Q1
10,920
4
0
366.3
2024 Q4
12,887
0
0
0.0
2024 Q3
4,533
2
0
441.2
Show 11 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
39,844
0
0
0.0
2024 Q1
29,453
0
0
0.0
2023 Q3
1,144
0
0
0.0
2023 Q2
640
0
0
0.0
2016 Q2
10
0
0
0.0
2016 Q1
15
0
0
0.0
2015 Q4
8
0
0
0.0
2015 Q3
8
0
0
0.0
2015 Q2
8
0
0
0.0
2015 Q1
19
1
0
52631.6
2014 Q4
42
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
3 on file
2026 · 1 incident
July 21, 2026NV · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techMACHINERY
Lithium Nevada Corp. · Caught in, under or between a moving and a stationary object
During a torquing operation, a RAD torque machine was inadvertently activated while the employee's left hand was on the reaction arm. The resulting movement of the reaction arm pinched the employee's left index finger against a steel structure, causing a finger fracture and requiring stitches.
Person slipped while exiting the fuel truck, hitting their left elbow on the step. Reported the incident, but continued to work. about two weeks later started having issues and pain in the left arm. EE's condition continued to get worse and started to affect EE's right arm as well. On March 18th a doctor directed EE, EE could not return to work.
2024 · 1 incident
September 27, 2024NV · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerOTHER
Miner called the supervisor saying EE did not feel good. 911 was called, and miner was put on an ambulance. The EMT's were fairly sure EE was having a heart attack.