Ruby Hill Mining Company, LLC. · Struck by falling object
IE was finishing tying in a round. Loose material fell from the face, striking them on the hard hat.
Archimedes Underground Mine: 13 MSHA citations Metal/Non-Metal
Archimedes Underground Mine has had no fatalities among 4 reportable incidents since 2026. MSHA has proposed $15K in penalties since 2025, with $302 outstanding.
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- Fatalities
- 0
- Total incidents
- 4
- Years on record
- 2026
- Latest incident
- Sep 2026
Compliance record
MSHA citations since 2025
13
citations
0
significant & substantial
$15,098
proposed penalties
$14,796
paid to date
98% of proposed penalties paid to date, a $302 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2025
6
inspections on record
113
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: 113 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Archimedes Underground Mine has $15K in proposed MSHA penalties and $302 outstanding across 1 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.$15K
proposed penalties
$15K
current assessed
$15K
paid to date
$302
outstanding
11 assessments are final orders; 1 contested dockets.
Of $504 in penalties contested before the Commission, $0 was upheld in final decisions.
As of the most recent assessment on 2026-07-29.
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.0.0%
significant & substantial
0.0%
high negligence or reckless
0.0%
reasonably likely or greater
15.4%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 38.5% low, 61.5% moderate, 0.0% 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.
1
citations taken to the federal commission · 8% of citations on record
- Vacated or withdrawn 1 · 100%
100%
Penalty reduction in decided contests
$504 proposed, $0 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 2026-01-27.
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 2026-0091 | Withdrawal | Simonton | 2026 | $504 → $0 |
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: 2026-05-20
ⓘ
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.0%
of limit-tested samples over the exposure limit
5
samples
5
limit-tested
Most sampled contaminants
- Quartz, respirable, >1% Qtz5
Show the individual readings (5)
| Date | Contaminant | Concentration | Limit | Conc / limit | Occupation |
|---|---|---|---|---|---|
| 2026-05-20 | Quartz, respirable, >1% Qtz | 0.28 | 0.66 | 0.42 | Truck Driver |
| 2026-05-20 | Quartz, respirable, >1% Qtz | 0.42 | 0.88 | 0.48 | Truck Driver |
| 2026-05-20 | Quartz, respirable, >1% Qtz | 0.51 | 1.52 | 0.34 | Roof Bolter, Rock |
| 2026-05-20 | Quartz, respirable, >1% Qtz | 0.34 | 0.89 | 0.38 | Mucking Mach. Operator |
| 2026-05-20 | Quartz, respirable, >1% Qtz | 0.52 | 0.72 | 0.72 | Mucking Mach. 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.
Ownership history
- Ruby Hill Mining Company, LLC. 2025 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
| Year | Employees |
|---|---|
| 2026 | 6 |
| 2025 | 6 |
Source: MSHA quarterly employment and production, updated weekly; years before 2000 come from MSHA's archived Part 50 employment files.
Archimedes Underground Mine sits in Eureka County, Nevada, where the Census mining category is 30.5% 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.Eureka County, Nevada · Population 1,660
30.5%
Mining share of county employment
$73,095
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; earlier incidents are counted but not rate-adjusted, though reported hours reach back to 1983. 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 | 1,050 | 1 | 0 | 952.4 |
| 2026 Q1 | 245 | 0 | 0 | 0.0 |
| 2025 Q4 | 704 | 0 | 0 | 0.0 |
| 2025 Q3 | 88 | 0 | 0 | 0.0 |
No fatalities recorded at this mine.
Reportable incidents
4 on file2026 · 4 incidents
August 18, 2026
NV · Metal/Non-Metal
laborer, bull gang, parts runner, roustabout, roof trimmer/scaler
HANDLING OF MATERIALS
Ruby Hill Mining Company, LLC. · Struck by... (Not Elsewhere Classified)
Helper disconnect the water hose at the centrifuge by releasing the camlock fitting. Helper released the camlock, the fitting separated unexpectedly and struck the injured person on the chin, causing a minor laceration.
July 21, 2026
NV · Metal/Non-Metal
laborer, bull gang, parts runner, roustabout, roof trimmer/scaler
OTHER
Ruby Hill Mining Company, LLC. · Unclassified, insufficient data
On the morning of July 21, 2026 at 11:01 the IP was found unresponsive on the deck of DDS-09. Emergency response team was called, IP was transported to hospital for evaluation
Ruby Hill Mining Company, LLC. · Struck by falling object
IE was transporting a concrete block with a forklift and chain when the chain slipped, causing the suspended block to fall onto the employee's right foot.