Moundhouse Aggregate Pit has $3K in proposed MSHA penalties and $0 outstanding across 0 contested dockets, plus health sampling and the full incident record.
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Fatalities
0
Total incidents
2
Years on record
2022–2024
Latest incident
Feb 2024
Compliance record
MSHA citations since 2018
16
citations
2
significant & substantial
$2,559
proposed penalties
$2,559
paid to date
100% of proposed penalties paid to date, a $0 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.
Rate withheld: 127 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Moundhouse Aggregate Pit has $3K 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.
$3K
proposed penalties
$3K
current assessed
$3K
paid to date
$0
outstanding
16 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2025-12-10.
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: 2018-11-14, 7 years ago
1
samples
0
limit-tested
Most sampled contaminants
Respirable dust, <.1mg1
Show the individual readings (1)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2018-11-14
Respirable dust, <.1mg
0
Front-end Loader 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.
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year
Employees
2026
6
2025
7
2024
5
2023
4
2022
4
2021
2
2020
2
2019
2
2018
2
2017
1
Source: MSHA quarterly employment and production, updated weekly.
Moundhouse Aggregate Pit 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
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2026 Q2
1,870
0
0
0.0
2026 Q1
1,929
0
0
0.0
2025 Q4
3,463
8
0
2310.1
2025 Q3
3,167
0
0
0.0
2025 Q2
7,852
0
0
0.0
2025 Q1
2,232
0
0
0.0
2024 Q4
3,399
0
0
0.0
2024 Q3
3,881
0
0
0.0
Show 30 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
3,071
0
0
0.0
2024 Q1
3,598
0
0
0.0
2023 Q4
3,030
0
0
0.0
2023 Q3
3,508
0
0
0.0
2023 Q2
2,887
0
0
0.0
2023 Q1
1,280
0
0
0.0
2022 Q4
2,159
0
0
0.0
2022 Q3
2,246
1
1
445.2
2022 Q2
1,873
0
0
0.0
2022 Q1
1,465
0
0
0.0
2021 Q4
985
0
0
0.0
2021 Q3
1,218
2
0
1642.0
2021 Q2
1,075
0
0
0.0
2021 Q1
1,032
1
0
969.0
2020 Q4
968
0
0
0.0
2020 Q3
1,862
0
0
0.0
2020 Q2
1,529
0
0
0.0
2020 Q1
988
1
0
1012.1
2019 Q4
796
0
0
0.0
2019 Q3
1,055
0
0
0.0
2019 Q2
1,052
2
1
1901.1
2019 Q1
1,136
0
0
0.0
2018 Q4
1,068
1
0
936.3
2018 Q3
1,080
0
0
0.0
2018 Q2
1,396
0
0
0.0
2018 Q1
1,023
0
0
0.0
2017 Q4
573
0
0
0.0
2017 Q3
515
0
0
0.0
2017 Q2
537
0
0
0.0
2017 Q1
507
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
2 on file
2024 · 1 incident
February 15, 2024NV · Metal/Non-Metalhaul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driverHANDLING OF MATERIALS
V & T Rock Inc. · Caught in, under or between a moving and a stationary object
Driver is not an employee of the mine. Driver is a customer. They got out of their truck to inspect what was going on with the tailgate and if it latched. The tailgate was not latched and the driver pulled up on tailgate. The tailgate slammed shut and cut the tip of the driver's finger.
2022 · 1 incident
July 29, 2022NV · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorSLIP OR FALL OF PERSON