MSHA record for Portable #3 (mine ID 3401766). Fatalities, non-fatal incidents grouped by year, current operator and controller, and mine context.
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Fatalities
0
Total incidents
1
Years on record
2022
Latest incident
Jun 2022
Inspection activity
MSHA inspections since 2018
9
inspections on record
55
inspection hours
n/a
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: 55 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, 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: 2023-02-15, 3 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
2023-02-15
Respirable dust, <.1mg
0
Dry Screen Plant 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
2
2025
2
2024
2
2023
2
2022
2
2021
1
2020
2
2019
2
2018
2
2000
0
Source: MSHA quarterly employment and production, updated weekly.
Portable #3 sits in Ottawa County, Oklahoma, where the Census mining category is 0.5% 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.
Ottawa County, Oklahoma · Population 30,360
0.5%
Mining share of county employment
$48,656
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
606
0
0
0.0
2026 Q1
164
0
0
0.0
2025 Q4
1
0
0
0.0
2025 Q3
92
0
0
0.0
2025 Q2
17
0
0
0.0
2025 Q1
1
0
0
0.0
2024 Q4
11
0
0
0.0
2024 Q3
115
0
0
0.0
Show 27 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
60
0
0
0.0
2024 Q1
255
0
0
0.0
2023 Q4
38
0
0
0.0
2023 Q3
1
0
0
0.0
2023 Q2
172
0
0
0.0
2023 Q1
149
0
0
0.0
2022 Q4
450
0
0
0.0
2022 Q3
9
0
0
0.0
2022 Q2
166
0
0
0.0
2022 Q1
21
0
0
0.0
2021 Q4
1
0
0
0.0
2021 Q3
31
0
0
0.0
2021 Q2
1
0
0
0.0
2021 Q1
1
0
0
0.0
2020 Q4
1
0
0
0.0
2020 Q3
201
0
0
0.0
2020 Q2
1
0
0
0.0
2020 Q1
7
0
0
0.0
2019 Q4
1
0
0
0.0
2019 Q3
453
0
0
0.0
2019 Q2
142
0
0
0.0
2019 Q1
259
0
0
0.0
2018 Q4
65
0
0
0.0
2018 Q3
61
0
0
0.0
2018 Q2
590
0
0
0.0
2018 Q1
13
0
0
0.0
2000 Q1
0
0
0
No fatalities recorded at this mine.
Reportable incidents
1 on file
2022 · 1 incident
June 24, 2022OK · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS
Diesel fuel spilled on the portable plant because someone left the handles open. When employee stepped on the rail of the plant, boot slipped on the rail causing them to fall striking the plant rail on right shin.
Related mines
Other mines operated by Wlliams Diversified Materials, Inc.