Lone Mountain Pit has $47K in proposed MSHA penalties and $8K outstanding across 6 contested dockets, plus health sampling and the full incident record.
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Fatalities
0
Total incidents
8
Years on record
1987–2025
Latest incident
Oct 2025
Compliance record
MSHA citations since 2001
120
citations
20
significant & substantial
$47,371
proposed penalties
$32,105
paid to date
68% of proposed penalties paid to date, a $15,266 gap.
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.
120 citations across 1,232 inspection hours.
Source: MSHA inspections data, updated weekly.
Lone Mountain Pit has $47K in proposed MSHA penalties and $8K outstanding across 6 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.
$47K
proposed penalties
$40K
current assessed
$32K
paid to date
$8K
outstanding
116 assessments are final orders; 6 contested dockets.
Of $25K in penalties contested before the Commission, $17K was upheld in final decisions.
As of the most recent assessment on 2026-03-24.
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.
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.
7citations taken to the federal commission · 6% of citations on record
Settled
2 · 29%
Vacated or withdrawn
3 · 43%
Still open
2 · 29%
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 Vacated and withdrawn citations, and settlements that removed the designation, count against.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 1 decided S&S contests · industry: 79%
17%
Penalty reduction in decided contests
$3K proposed, $2K 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 2026-07-14.
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.
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: 2026-08-27
0%
of limit-tested samples over the exposure limit
18
samples
5
limit-tested
Most sampled contaminants
Unlisted Particulate, respirable, <1% Qtz8
Respirable dust, <.1mg5
Quartz, respirable, >1% Qtz3
Nuisance dust, respirable, <1% Qtz2
Show the individual readings (18)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2026-08-27
Respirable dust, <.1mg
0
Front-end Loader Operator
2026-08-27
Respirable dust, <.1mg
0
Front-end Loader Operator
2023-05-24
Nuisance dust, respirable, <1% Qtz
0.14
10
0.01
Laborer, Bullgang
2023-05-24
Nuisance dust, respirable, <1% Qtz
0.19
10
0.02
Dry Screen Plant Operator
2019-08-22
Unlisted Particulate, respirable, <1% Qtz
0.29
Dry Screen Plant Operator
2019-08-22
Unlisted Particulate, respirable, <1% Qtz
0.38
Front-end Loader Operator
2016-02-10
Quartz, respirable, >1% Qtz
0.46
2.78
0.17
Dry Screen Plant Operator
2013-08-26
Respirable dust, <.1mg
0
Front-end Loader Operator
2013-08-26
Unlisted Particulate, respirable, <1% Qtz
0.16
Cleanup Man
2009-12-02
Unlisted Particulate, respirable, <1% Qtz
0.74
Front-end Loader Operator
2009-12-02
Unlisted Particulate, respirable, <1% Qtz
0.48
Dry Screen Plant Operator
2007-06-28
Quartz, respirable, >1% Qtz
0.82
2.74
0.30
Cleanup Man
2007-06-28
Unlisted Particulate, respirable, <1% Qtz
0.32
Mechanic
2006-01-05
Respirable dust, <.1mg
0
Cleanup Man
2006-01-05
Respirable dust, <.1mg
0
Front-end Loader Operator
2001-07-18
Unlisted Particulate, respirable, <1% Qtz
0.13
Supervisor, Co. Official
2001-07-18
Unlisted Particulate, respirable, <1% Qtz
0.13
Front-end Loader Operator
2001-07-18
Quartz, respirable, >1% Qtz
0.33
2.38
0.14
Dry Screen Plant Operator
Area samples (mill and shop air)
Last sampled: 2016-02-10, 10 years ago
1
samples
Show the individual readings (1)
Date
Contaminant
Concentration
Limit
Conc / limit
Area sampled
2016-02-10
Fibers, >5um
0
SF ORE PROCESSING
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.
Lone Mountain Pit recorded 12.77 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.
12.77
total case rate
12.77
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 *
12.77
12.77
0.000
2024 *
0.00
0.00
0.000
2023 *
0.00
0.00
0.000
2022 *
0.00
0.00
0.000
2021 *
0.00
0.00
0.000
2019 *
0.00
0.00
0.000
2009 *
0.00
0.00
0.000
2008 *
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
14
2025
15
2024
17
2023
18
2022
14
2021
13
2020
9
2019
13
2018
8
2017
8
2016
6
2015
6
2014
7
2013
8
2012
7
2011
6
2010
6
2009
10
2008
10
2007
13
2006
19
2005
22
2004
11
2003
11
2002
12
2001
9
2000
9
Source: MSHA quarterly employment and production, updated weekly.
Lone Mountain Pit sits in Clark County, Nevada, where the Census mining category is 0.2% 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.
Clark County, Nevada · Population 2,293,764
0.2%
Mining share of county employment
$73,845
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
Customer was using 773 haul trucks to be loaded with boulders from LVP pit to be taken off site. During execution the trail haul truck lost brakes on a downhill slope between 6-10 degree decline. The trail truck struck the lead truck pushing it under LVP dozer trap. 911 called immediately and flight for life was dispatched. Front miner has broken ribs and back.
March 25, 2025NV · Metal/Non-Metalwater truck operatorPOWERED HAULAGE
The operator was watering a road with a CAT 621G water pull. The operator was driving approximately 10 miles per hour when they drove into the equipment parking V-ditch. The operator stated that they knew it was there, but didn't notice it due to an optical illusion. The impact bounced them in the seat straining their lower back. The operator was having a hard time breathing.
2002 · 1 incident
July 30, 2002NV · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorPOWERED HAULAGE
EE WAS ON THE CONVEYER CHECKING THE MOTOR DO TO A KICKOUT ON THE BREAKER. AFTER CHECKING THE MOTOR HE STARTED TO WALK DOWN THE CONVEYER TO GET OFF WHEN THE CONVEYER KICKED ON. HE FELL ONTO THE CONVEYER BELT, TRAVELING HALFWAY DOWN THE CONVEYER WHEN HE ROLLED OFF THE CONVEYER AND HITTING THE RIGHT SIDE OF HIS FACE ON THE FRAME OF THE CONVEYER, FRACTURING JAW DAMAGING EYE.
2001 · 1 incident
June 29, 2001NV · Metal/Non-Metalblaster, shooter, shotfirer, explosive worker, powder gang/monkeyHANDLING OF MATERIALS
WHILE INSTALLING A GEAR SHAFT IN THE PUG MILL EMPLOYEE STARINED HIS LEFT HAND. GEAR SHAFT WEIGHT IS APPROX 100 POUNDS.
March 10, 1994NV · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorSLIP OR FALL OF PERSON
EMPLOYEE WAS LIFTING A PIECE OF PIPE OUT OF WASHPLANT PAN. PIPE WEIGHT APPROX 100 LBS . INJURED TWISTED WHILE LIFTING PIPE & FELL TO THE GROUND.HE WAS ADMITTED TO THE HOSPITAL.
1991 · 1 incident
May 30, 1991NV · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanPOWERED HAULAGE
I WAS BRUSHING 5T RAIN MINE SITE, THE HAUL WAS ABOUT 2 MILES, AT APPROX. 330 I GOT A LOAD, STARTED DOWN TO THE BRUSH DUMP, THE HAUL LOADS WALL IN BAD SHAPE I GOT DOWN 1 1/2 MILES AND HIT SEVE HOLES IN THE R2AD THAT WHEN THE PAIN STARTED IN MY LOWER BACK.