LIBERTY STONE & AGGREGATES-CLINTON 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
10
Years on record
2018–2024
Latest incident
Mar 2024
Compliance record
MSHA citations since 2018
20
citations
4
significant & substantial
$2,915
proposed penalties
$2,915
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: 204 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Imminent-danger orders
ⓘA Section 107(a) order removes miners from an area when an inspector finds an imminent danger. Each order is lifted once the condition is corrected, so this counts orders issued, not orders now in effect.
1
Section 107(a) orders
Most recent order: 2025-09-17.
On record since 2025.
Source: MSHA imminent-danger order records, updated weekly.
LIBERTY STONE & AGGREGATES-CLINTON 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
19 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2025-09-17.
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: 2025-09-17
0%
of limit-tested samples over the exposure limit
11
samples
1
limit-tested
Most sampled contaminants
Respirable dust, <.1mg8
Quartz, respirable, >1% Qtz2
Unlisted Particulate, respirable, <1% Qtz1
Show the individual readings (11)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2025-09-17
Respirable dust, <.1mg
0
Bulldozer Operator
2025-09-17
Respirable dust, <.1mg
0
Front-end Loader Operator
2022-12-20
Quartz, respirable, >1% Qtz
0.13
Truck Driver
2022-12-20
Respirable dust, <.1mg
0
Rotary Bucket Ex. Operator
2021-10-14
Respirable dust, <.1mg
0
Rotary Bucket Ex. Operator
2021-10-14
Respirable dust, <.1mg
0
Utility Man
2021-10-14
Unlisted Particulate, respirable, <1% Qtz
0.58
Front-end Loader Operator
2020-07-16
Respirable dust, <.1mg
0
Bulldozer Operator
2020-07-16
Respirable dust, <.1mg
0
Dry Screen Plant Operator
2020-07-16
Quartz, respirable, >1% Qtz
0.12
0.39
0.31
Backhoe Operator
2020-07-16
Respirable dust, <.1mg
0
Utility 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.
LIBERTY STONE & AGGREGATES-CLINTON 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
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 New Jersey, metal and nonmetal mining averaged 2.59 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 *
12.00
12.00
0.000
2023 *
6.62
0.00
0.000
2022 *
13.61
6.80
0.000
2021 *
0.00
0.00
0.000
2020 *
17.05
17.05
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
2025
15
2024
18
2023
15
2022
16
2021
16
2020
17
2019
9
2018
11
2017
12
Source: MSHA quarterly employment and production, updated weekly.
LIBERTY STONE & AGGREGATES-CLINTON sits in Hunterdon County, New Jersey, 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.
Hunterdon County, New Jersey · Population 129,448
0.2%
Mining share of county employment
$139,453
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
2025 Q4
6,970
0
0
0.0
2025 Q3
5,636
2
1
354.9
2025 Q2
7,609
0
0
0.0
2025 Q1
9,424
1
0
106.1
2024 Q4
10,000
0
0
0.0
2024 Q3
8,816
0
0
0.0
2024 Q2
8,693
1
0
115.0
2024 Q1
5,833
2
1
342.9
Show 25 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2023 Q4
6,338
0
0
0.0
2023 Q3
7,225
0
0
0.0
2023 Q2
8,118
2
0
246.4
2023 Q1
8,526
0
0
0.0
2022 Q4
8,399
1
0
119.1
2022 Q3
9,238
0
0
0.0
2022 Q2
6,943
0
0
0.0
2022 Q1
4,820
0
0
0.0
2021 Q4
4,843
2
0
413.0
2021 Q3
5,341
0
0
0.0
2021 Q2
6,166
1
0
162.2
2021 Q1
5,112
0
0
0.0
2020 Q4
6,422
1
0
155.7
2020 Q3
5,161
1
0
193.8
2020 Q2
7,116
0
0
0.0
2020 Q1
4,757
0
0
0.0
2019 Q4
3,901
0
0
0.0
2019 Q3
4,303
5
2
1162.0
2019 Q2
4,456
0
0
0.0
2019 Q1
3,920
0
0
0.0
2018 Q4
3,909
0
0
0.0
2018 Q3
4,507
1
0
221.9
2018 Q2
3,998
0
0
0.0
2018 Q1
3,284
0
0
0.0
2017 Q4
4,099
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
10 on file
2024 · 2 incidents
March 14, 2024NJ · Metal/Non-Metalhaul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driverHANDLING OF MATERIALS