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: 351 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Duncan Plant has $15K in proposed MSHA penalties and $1K 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.
$15K
proposed penalties
$15K
current assessed
$13K
paid to date
$1K
outstanding
30 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-06-09.
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: 2026-06-10
7
samples
0
limit-tested
Most sampled contaminants
Respirable dust, <.1mg7
Show the individual readings (7)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2026-06-10
Respirable dust, <.1mg
0
Front-end Loader Operator
2026-06-10
Respirable dust, <.1mg
0
Washer Operator
2024-08-15
Respirable dust, <.1mg
0
Supervisor, Co. Official
2024-08-15
Respirable dust, <.1mg
0
Front-end Loader Operator
2022-05-19
Respirable dust, <.1mg
0
Front-end Loader Operator
2022-05-19
Respirable dust, <.1mg
0
Front-end Loader Operator
2017-10-24
Respirable dust, <.1mg
0
Washer 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.
Duncan Plant recorded 9.99 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.
9.99
total case rate
4.99
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 *
9.99
4.99
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
2020 *
0.00
0.00
0.000
2019 *
3.88
3.88
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
15
2025
18
2024
21
2023
26
2022
15
2021
14
2020
17
2019
15
2018
14
2017
12
2016
10
Source: MSHA quarterly employment and production, updated weekly.
Duncan Plant sits in Colorado County, Texas, where the Census mining category is 3.2% 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.
Colorado County, Texas · Population 20,736
3.2%
Mining share of county employment
$68,554
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
9,160
1
0
109.2
2026 Q1
11,547
2
0
173.2
2025 Q4
10,040
0
0
0.0
2025 Q3
9,365
0
0
0.0
2025 Q2
10,276
4
3
389.3
2025 Q1
10,376
0
0
0.0
2024 Q4
10,613
1
0
94.2
2024 Q3
9,469
2
0
211.2
Show 33 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
10,351
0
0
0.0
2024 Q1
11,343
3
0
264.5
2023 Q4
10,690
0
0
0.0
2023 Q3
10,550
2
0
189.6
2023 Q2
11,377
0
0
0.0
2023 Q1
12,443
1
0
80.4
2022 Q4
12,504
0
0
0.0
2022 Q3
12,802
0
0
0.0
2022 Q2
14,357
0
0
0.0
2022 Q1
9,926
0
0
0.0
2021 Q4
9,080
1
0
110.1
2021 Q3
6,955
0
0
0.0
2021 Q2
11,659
1
0
85.8
2021 Q1
13,556
0
0
0.0
2020 Q4
14,185
1
0
70.5
2020 Q3
12,191
0
0
0.0
2020 Q2
12,588
0
0
0.0
2020 Q1
14,114
0
0
0.0
2019 Q4
12,916
1
0
77.4
2019 Q3
13,164
0
0
0.0
2019 Q2
13,103
0
0
0.0
2019 Q1
12,362
1
0
80.9
2018 Q4
11,615
0
0
0.0
2018 Q3
9,263
1
0
108.0
2018 Q2
11,167
0
0
0.0
2018 Q1
9,519
0
0
0.0
2017 Q4
8,149
2
0
245.4
2017 Q3
8,936
0
0
0.0
2017 Q2
8,273
0
0
0.0
2017 Q1
7,974
1
0
125.4
2016 Q4
7,700
0
0
0.0
2016 Q3
7,548
1
0
132.5
2016 Q2
6,876
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
4 on file
2025 · 2 incidents
November 13, 2025TX · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanHANDTOOLS (NONPOWERED)
Employee was assisting with repairs to the dredge using a cutting tool and torch to remove a bolt. Bolt head was struck with sledgehammer causing bolt to shear and fragment penetrating employee in lower abdomen. Employee was taken to ER and transferred to another hospital where employee is currently having emergency surgery
September 27, 2025TX · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDTOOLS (NONPOWERED)
Employees were working on replacing some pipe on the dredge and while using a pry bar to pry a gasket off, the bar slipped and hit the miner in the face causing a laceration right under the left eye which required a total of 12 stitches.
2023 · 1 incident
August 18, 2023TX · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanPOWERED HAULAGE
Two contractors were working on a chute job on one of our sites and the main contractor was in the telehandler and their EE was working on the catwalk when the operator dropped EE's water bottle and when reached to get it, lowered the boom. Causing their EE to be pinched in between the back of the forks and the stationary I-beam
2019 · 1 incident
April 2, 2019TX · Metal/Non-Metalmine manager, mine foreman, mine ownerHANDLING OF MATERIALS
The EE was moving the swing cable to gain slack and make a connection to the anchor point, they tripped on uneven ground. The cable was in hands, waist level when they tripped. EE dropped it and caught themselves with their hands.The EE felt immediate pain in right shoulder. EE was taken to the doctor and prescribed pain medicine, muscle relaxers, and physical therapy.