Arcosa Diamond North #1884 has $1K 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
1
Years on record
2020
Latest incident
Feb 2020
Compliance record
MSHA citations since 2018
9
citations
0
significant & substantial
$1,188
proposed penalties
$1,188
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: 106 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Arcosa Diamond North #1884 has $1K 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.
$1K
proposed penalties
$1K
current assessed
$1K
paid to date
$0
outstanding
9 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2025-10-22.
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: 2024-01-25
0%
of limit-tested samples over the exposure limit
5
samples
5
limit-tested
Most sampled contaminants
Nuisance dust, total, <1% Qtz5
Show the individual readings (5)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2024-01-25
Nuisance dust, total, <1% Qtz
1.59
10
0.16
Front-end Loader Operator
2024-01-25
Nuisance dust, total, <1% Qtz
1.92
10
0.19
Rotary Bucket Ex. Operator
2019-06-19
Nuisance dust, total, <1% Qtz
2.83
10
0.28
Cont. Miner Operator
2019-06-19
Nuisance dust, total, <1% Qtz
0.52
10
0.05
Front-end Loader Operator
2019-06-19
Nuisance dust, total, <1% Qtz
0.21
10
0.02
Truck Driver
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
1
2025
1
2024
2
2023
2
2020
7
2019
10
2018
4
Source: MSHA quarterly employment and production, updated weekly.
Arcosa Diamond North #1884 sits in Blaine County, Oklahoma, where the Census mining category is 6.5% 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.
Blaine County, Oklahoma · Population 8,603
6.5%
Mining share of county employment
$59,304
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
405
0
0
0.0
2026 Q1
440
0
0
0.0
2025 Q4
440
2
0
4545.5
2025 Q3
464
0
0
0.0
2025 Q2
416
0
0
0.0
2025 Q1
440
0
0
0.0
2024 Q4
452
0
0
0.0
2024 Q3
435
0
0
0.0
Show 15 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
525
0
0
0.0
2024 Q1
656
1
0
1524.4
2023 Q4
688
0
0
0.0
2023 Q3
464
0
0
0.0
2020 Q4
396
0
0
0.0
2020 Q3
681
0
0
0.0
2020 Q2
1,566
1
0
638.6
2020 Q1
3,532
0
0
0.0
2019 Q4
4,312
2
0
463.8
2019 Q3
4,840
0
0
0.0
2019 Q2
5,000
0
0
0.0
2019 Q1
2,509
0
0
0.0
2018 Q4
3,700
0
0
0.0
2018 Q3
275
1
0
3636.4
2018 Q2
750
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
1 on file
2020 · 1 incident
February 19, 2020OK · Metal/Non-Metalmine manager, mine foreman, mine ownerHANDLING OF MATERIALS
On 02/19/2020 the EE lifted a 12 battery from office porch and felt a pop and pain in right elbow and shoulder. The EE was taken for medical treatment, x-rays were done and was diagnosed with a strain and returned to work. The EE had continuing discomfort but was unable to be seen due to COVID-19 restrictions. 04/01/2020 the EE was again seen and given injections.
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