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: 450 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Hunter Stone 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
22 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-05-19.
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: 2024-12-18
6
samples
0
limit-tested
Most sampled contaminants
Respirable dust, <.1mg4
Quartz, respirable, >1% Qtz2
Show the individual readings (6)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2024-12-18
Quartz, respirable, >1% Qtz
0.15
Laborer, Bullgang
2024-12-18
Respirable dust, <.1mg
0
Laborer, Bullgang
2024-12-18
Respirable dust, <.1mg
0
Truck Driver
2020-12-16
Quartz, respirable, >1% Qtz
0.24
Crusher Oper/Worker
2020-12-16
Respirable dust, <.1mg
0
Scraper Operator
2020-12-16
Respirable dust, <.1mg
0
Laborer, Bullgang
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.
Hunter Stone recorded 3.06 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.
3.06
total case rate
0.00
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 Texas, metal and nonmetal mining averaged 1.17 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 *
3.06
0.00
0.000
2024 *
2.50
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
2020
0.00
0.00
0.000
2019 *
0.00
0.00
0.000
2018 *
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
32
2025
32
2024
35
2023
43
2022
40
2021
43
2020
41
2019
30
2018
26
2017
24
Source: MSHA quarterly employment and production, updated weekly.
Hunter Stone sits in Comal County, Texas, where the Census mining category is 1.0% 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.
Comal County, Texas · Population 174,552
1.0%
Mining share of county employment
$99,015
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
17,906
1
0
55.8
2026 Q1
16,084
0
0
0.0
2025 Q4
14,639
0
0
0.0
2025 Q3
14,619
0
0
0.0
2025 Q2
19,497
0
0
0.0
2025 Q1
16,564
0
0
0.0
2024 Q4
18,343
1
0
54.5
2024 Q3
14,640
0
0
0.0
Show 30 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
23,885
0
0
0.0
2024 Q1
23,268
5
0
214.9
2023 Q4
26,896
0
0
0.0
2023 Q3
31,287
0
0
0.0
2023 Q2
31,777
0
0
0.0
2023 Q1
31,485
0
0
0.0
2022 Q4
31,270
0
0
0.0
2022 Q3
31,572
0
0
0.0
2022 Q2
28,927
0
0
0.0
2022 Q1
25,430
0
0
0.0
2021 Q4
35,992
2
0
55.6
2021 Q3
32,329
0
0
0.0
2021 Q2
28,611
1
0
35.0
2021 Q1
23,565
0
0
0.0
2020 Q4
31,465
2
0
63.6
2020 Q3
28,517
0
0
0.0
2020 Q2
26,164
0
0
0.0
2020 Q1
25,822
0
0
0.0
2019 Q4
24,641
0
0
0.0
2019 Q3
15,417
0
0
0.0
2019 Q2
14,540
0
0
0.0
2019 Q1
19,276
2
1
103.8
2018 Q4
15,614
0
0
0.0
2018 Q3
16,238
1
0
61.6
2018 Q2
19,466
0
0
0.0
2018 Q1
15,303
1
0
65.3
2017 Q4
16,046
0
0
0.0
2017 Q3
18,982
0
0
0.0
2017 Q2
13,177
2
0
151.8
2017 Q1
3,310
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
2 on file
2025 · 1 incident
August 18, 2025TX · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techMACHINERY