DAYTON MATERIALS has $76K in proposed MSHA penalties and $24K outstanding across 10 contested dockets, plus health sampling and the full incident record.
Watch this mine
Email me when a new MSHA incident is filed at DAYTON MATERIALS.
Fatalities
0
Total incidents
10
Years on record
2003–2026
Latest incident
Jun 2026
Compliance record
MSHA citations since 2000
178
citations
44
significant & substantial
$76,101
proposed penalties
$44,011
paid to date
58% of proposed penalties paid to date, a $32,090 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.
178 citations across 1,088 inspection hours.
Source: MSHA inspections data, updated weekly.
DAYTON MATERIALS has $76K in proposed MSHA penalties and $24K outstanding across 10 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.
$76K
proposed penalties
$68K
current assessed
$44K
paid to date
$24K
outstanding
147 assessments are final orders; 10 contested dockets.
Of $22K in penalties contested before the Commission, $14K was upheld in final decisions.
As of the most recent assessment on 2025-11-05.
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.
35citations taken to the federal commission · 20% of citations on record
Settled
6 · 17%
Vacated or withdrawn
1 · 3%
Still open
28 · 80%
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 Vacated and withdrawn citations, and settlements that removed the designation, count against.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 4 decided S&S contests · industry: 79%
21%
Penalty reduction in decided contests
$851 proposed, $673 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 2026-03-05.
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: 2018-11-06, 7 years ago
0%
of limit-tested samples over the exposure limit
13
samples
5
limit-tested
Most sampled contaminants
Respirable dust, <.1mg6
Quartz, respirable, >1% Qtz5
Unlisted Particulate, respirable, <1% Qtz2
Show the individual readings (13)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2018-11-06
Respirable dust, <.1mg
0
Front-end Loader Operator
2017-06-29
Respirable dust, <.1mg
0
Dry Screen Plant Operator
2014-04-16
Quartz, respirable, >1% Qtz
0.4
0.54
0.74
Laborer, Bullgang
2014-04-16
Quartz, respirable, >1% Qtz
0.24
0.54
0.44
Dry Screen Plant Operator
2010-05-04
Respirable dust, <.1mg
0
Front-end Loader Operator
2010-05-04
Respirable dust, <.1mg
0
Supervisor, Co. Official
2009-03-11
Unlisted Particulate, respirable, <1% Qtz
0.23
Crusher Oper/Worker
2009-03-11
Respirable dust, <.1mg
0
Front-end Loader Operator
2009-03-11
Respirable dust, <.1mg
0
Backhoe Operator
2009-03-11
Quartz, respirable, >1% Qtz
0.84
2.03
0.41
Laborer, Bullgang
2005-03-22
Quartz, respirable, >1% Qtz
0.97
1.94
0.50
Bulldozer Operator
2005-03-22
Unlisted Particulate, respirable, <1% Qtz
0.14
Front-end Loader Operator
2005-03-22
Quartz, respirable, >1% Qtz
0.99
2.98
0.33
Cleanup Man
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.
DAYTON MATERIALS recorded 3.68 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.
3.68
total case rate
3.68
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 *
3.68
3.68
0.000
2024 *
0.00
0.00
0.000
2023 *
13.01
4.34
0.000
2022 *
0.00
0.00
0.000
2021 *
0.00
0.00
0.000
2020 *
0.00
0.00
0.000
2019 *
0.00
0.00
0.000
2018 *
5.96
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
24
2025
24
2024
25
2023
20
2022
16
2021
14
2020
14
2019
14
2018
12
2017
14
2016
11
2015
10
2014
10
2013
8
2012
13
2011
8
2010
8
2009
12
2008
14
2007
17
2006
22
2005
22
2004
21
2003
16
2002
9
2001
9
2000
7
Source: MSHA quarterly employment and production, updated weekly.
DAYTON MATERIALS sits in Lyon County, Nevada, where the Census mining category is 2.2% 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.
Lyon County, Nevada · Population 60,630
2.2%
Mining share of county employment
$73,460
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
a newly hired laborer for the Dayton pit went to the pit supervisor and informed them that EE had hurt EEs wrist shoveling from the previous day. The employee said that EE was using a shovel to clean off a concrete pad that had build-up on it and the shovel lip caught crack in the concrete, which caused the shovel to stop moving abruptly, which is when EE said the pain occurred.
2025 · 1 incident
November 25, 2025NV · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerHANDLING OF MATERIALS
3D Concrete LLC · Caught in, under or between a moving and a stationary object
employee was helping step Eco blocks up for new crusher and got EE's left leg caught between two blocks and hurt both left knee and ankle.
2023 · 3 incidents
November 20, 2023NV · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanHANDLING OF MATERIALS
3D Concrete LLC · Caught in, under or between a moving and a stationary object
while employee was helping change screens the employee was loosening 2 bolts to release tension bar and it smashed their left thumb
July 7, 2023NV · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS
3D Concrete LLC · Caught in, under or between a moving and a stationary object
Contractor employee (Kimball Equipment) was reinstalling the wedge into the cone. It wasn't sitting all the way in and the employee reached down to feel why it wasn't. It dropped into place catching EE's left pinky finger, taking the tip of the finger off.
May 9, 2023NV · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerPOWERED HAULAGE
3D Concrete LLC · Caught in, under or between running or meshing objects
Miner was greasing belt take up/ bearings and roller while belt was running to identify which bearing was squealing and going bad. Miner removed guard to conduct greasing and while greasing the grease line got caught on belt and pulled miner's hand under roller between belt
2018 · 1 incident
August 29, 2018NV · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanPOWERED HAULAGE
Employee was doing clean up on the ground near crusher and conveyor when a rock rolled and bounced off the head end of the feed conveyor and struck employee in the back. The conveyor was lightly loaded at time. Contusion and hairline fracture to back.
2004 · 1 incident
April 1, 2004NV · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorMACHINERY
Dayton Materials LLC · Caught in, under or between a moving and a stationary object
While changing drive a bolt on the cedar rapids 6x20 2 deck wet screen-the plant was locked out tagged out the belt slipped and pinched ee middle finger on his left hand-he was wearing both gloves and safety glasses laceation on middle finger left hand.
WHILE ATTEMPTING TO TRACK THE OVERHEAD FEED BELT FOR THE WET PLANT, THE EMPLOYEE NOTICED A BUILD-UP ON THE FEED ROLLERS AND ATTEMPTED TO REMOVE THE BUILD-UP BY USING A LADDER OF THE SAFETY FEN CE TO SUPPORT HIMSELF WHILE USING A PUTTY KNIFE TO SCRAPE THE GUIDE PULLEY. CONVEYOR WAS RUNNING AND PULLED HIM IN.