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: 238 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Portable Plant #5 has $8K 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.
$8K
proposed penalties
$8K
current assessed
$8K
paid to date
$0
outstanding
46 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-06-11.
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: 2026-06-11
0%
of limit-tested samples over the exposure limit
10
samples
2
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz5
Respirable dust, <.1mg4
Nuisance dust, respirable, <1% Qtz1
Show the individual readings (10)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2026-06-11
Quartz, respirable, >1% Qtz
0.13
Building Repair/Maint.
2026-06-11
Respirable dust, <.1mg
0
Front-end Loader Operator
2026-06-11
Quartz, respirable, >1% Qtz
0.39
1.56
0.25
Cleanup Man
2023-09-19
Respirable dust, <.1mg
0
Shovel Operator
2023-09-19
Respirable dust, <.1mg
0
Front-end Loader Operator
2023-09-19
Nuisance dust, respirable, <1% Qtz
0.21
10
0.02
Truck Driver
2021-09-29
Quartz, respirable, >1% Qtz
0.27
Crusher Oper/Worker
2021-09-29
Quartz, respirable, >1% Qtz
0.16
Truck Driver
2021-09-29
Respirable dust, <.1mg
0
Truck Driver
2021-09-29
Quartz, respirable, >1% Qtz
0.4
Backhoe 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.
Portable Plant #5 recorded 8.96 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.
8.96
total case rate
8.96
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 Kansas, metal and nonmetal mining averaged 1.88 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 *
8.96
8.96
0.000
2024 *
0.00
0.00
0.000
2023 *
8.31
8.31
0.000
2021 *
8.65
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
9
2025
11
2024
12
2023
12
2022
9
2021
10
2020
7
2019
6
2018
6
2017
7
2013
4
2012
7
Source: MSHA quarterly employment and production, updated weekly.
Portable Plant #5 sits in Riley County, Kansas, where the Census mining category is 0.1% 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.
Riley County, Kansas · Population 71,710
0.1%
Mining share of county employment
$59,560
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
5,353
4
1
747.2
2026 Q1
4,614
6
0
1300.4
2025 Q4
4,299
0
0
0.0
2025 Q3
5,687
3
0
527.5
2025 Q2
6,907
0
0
0.0
2025 Q1
5,429
1
0
184.2
2024 Q4
6,400
0
0
0.0
2024 Q3
7,250
0
0
0.0
Show 36 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
6,727
4
1
594.6
2024 Q1
6,001
5
1
833.2
2023 Q4
5,056
0
0
0.0
2023 Q3
5,752
1
0
173.9
2023 Q2
6,886
0
0
0.0
2023 Q1
6,379
4
2
627.1
2022 Q4
4,719
0
0
0.0
2022 Q3
4,122
0
0
0.0
2022 Q2
3,815
1
0
262.1
2022 Q1
3,812
5
1
1311.6
2021 Q4
7,618
0
0
0.0
2021 Q3
6,193
0
0
0.0
2021 Q2
5,058
0
0
0.0
2021 Q1
4,257
0
0
0.0
2020 Q4
4,638
4
1
862.4
2020 Q3
4,508
0
0
0.0
2020 Q2
3,521
0
0
0.0
2020 Q1
1,311
0
0
0.0
2019 Q4
2,769
1
0
361.1
2019 Q3
60
0
0
0.0
2019 Q2
3,720
1
0
268.8
2019 Q1
3,420
0
0
0.0
2018 Q4
3,982
0
0
0.0
2018 Q3
1,511
0
0
0.0
2018 Q2
1,867
0
0
0.0
2018 Q1
1,229
1
0
813.7
2017 Q4
3,800
0
0
0.0
2017 Q3
3,243
0
0
0.0
2017 Q2
3,927
0
0
0.0
2017 Q1
2,355
2
0
849.3
2013 Q3
49
2
0
40816.3
2013 Q2
31
0
0
0.0
2013 Q1
1,487
0
0
0.0
2012 Q4
1,813
0
0
0.0
2012 Q3
490
0
0
0.0
2012 Q2
1,464
1
0
683.1
No fatalities recorded at this mine.
Reportable incidents
6 on file
2025 · 1 incident
January 2, 2025KS · Metal/Non-Metalhaul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driverSLIP OR FALL OF PERSON
Employee was climbing a ladder to access a screening plant when the ladder moved. EE reached out to grab the chain to steady self and heard a pop in EE's shoulder.
Miner was in a skid loader on a designated route. A haul truck was headed toward the miner. It appeared that the haul truck driver did not notice the skid loader. Skid loader operator turned and was hit by the haul truck and spun out the skid loader, the skid loader operator hit their head when the skid loader came back down, hit their head again and also injured left shoulder.
2022 · 1 incident
September 19, 2022KS · Metal/Non-Metalhaul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driverSLIP OR FALL OF PERSON
Employee was getting out of a skid loader. EE's pant leg got caught on one of the latches as EE was getting out causing EE to fall and hit R knee. Went to K-Stat had x-rays, told EE to put ice on it and released EE with no restrictions.
Was loosening a high pressure hose on a piece of equipment and thought they had released the pressure on the hydraulics. When the hose was loosened it broke loose shooting hydraulic oil onto EE's hard hat and then on the right side of EE's neck. Checked self out and there wasn't any broken skin. Went to urgent care next day to be checked out.
Was operating a haul truck with an exhaust leak for a day and a half before EE realized what was going on. EE was put in a different truck and the mechanic was called to repair the truck. The accumulative affects hit EE on Thursday on the way into work and EE went to the emergency room.
2012 · 1 incident
May 22, 2012KS · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanHANDTOOLS (NONPOWERED)
Hit right middle finger with pry bar. Hand was up against a piece of machinery. 2 cm laceration to the top of right middle finger on MIP joint. 0.5 avulsion of skin on posterior MIP joint, no repair needed to this injury.
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