Otterville Quarry has $46K in proposed MSHA penalties and $1K outstanding across 3 contested dockets, plus health sampling and the full incident record.
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Fatalities
0
Total incidents
1
Years on record
2017
Latest incident
Jul 2017
Compliance record
MSHA citations since 2016
86
citations
20
significant & substantial
$46,244
proposed penalties
$30,962
paid to date
67% of proposed penalties paid to date, a $15,282 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: 455 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Imminent-danger orders
ⓘA Section 107(a) order removes miners from an area when an inspector finds an imminent danger. Each order is lifted once the condition is corrected, so this counts orders issued, not orders now in effect.
1
Section 107(a) orders
Most recent order: 2024-12-04.
On record since 2024.
Source: MSHA imminent-danger order records, updated weekly.
Otterville Quarry has $46K in proposed MSHA penalties and $1K outstanding across 3 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.
$46K
proposed penalties
$32K
current assessed
$31K
paid to date
$1K
outstanding
83 assessments are final orders; 3 contested dockets.
Of $22K in penalties contested before the Commission, $8K was upheld in final decisions.
As of the most recent assessment on 2026-07-13.
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.
When citations were contested
ⓘContesting a citation before the Federal Mine Safety and Health Review Commission is a lawful right. These figures state the public outcomes of that process, from MSHA's Contested Violations file.
4citations taken to the federal commission · 5% of citations on record
Settled
4 · 100%
0%
S&S designation survived the contest
ⓘCounts a Significant & Substantial citation as surviving when a settlement or judge's decision kept the designation, or the contest was dismissed or defaulted so the citation stands as issued. Vacated and withdrawn citations, and settlements that removed the designation, count against.
of 4 decided S&S contests · industry: 79%
63%
Penalty reduction in decided contests
$22K proposed, $8K after decisions · industry: 39%
Source: MSHA Contested Violations file (public record), updated weekly. A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record. Latest contest filed 2022-08-14.
Contested penalties
ⓘA reduction or dismissal at the Commission is a lawful outcome of contesting a proposed penalty. Figures are the proposed amount and the amount upheld in the docket's decision.
Largest penalties this mine contested before the Federal Mine Safety and Health Review Commission, with the outcome on record.
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: 2024-08-27
0%
of limit-tested samples over the exposure limit
12
samples
3
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz5
Respirable dust, <.1mg5
Nuisance dust, respirable, <1% Qtz2
Show the individual readings (12)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2024-08-27
Quartz, respirable, >1% Qtz
0.29
Cleanup Man
2024-08-27
Quartz, respirable, >1% Qtz
0.29
1.19
0.24
Front-end Loader Operator
2024-08-27
Nuisance dust, respirable, <1% Qtz
0.14
10
0.01
Supervisor, Co. Official
2024-08-27
Quartz, respirable, >1% Qtz
0.38
Mechanic
2022-12-06
Respirable dust, <.1mg
0
Front-end Loader Operator
2022-12-06
Respirable dust, <.1mg
0
Crusher Oper/Worker
2022-12-06
Respirable dust, <.1mg
0
Front-end Loader Operator
2019-11-19
Quartz, respirable, >1% Qtz
0.29
Supervisor, Co. Official
2019-11-19
Quartz, respirable, >1% Qtz
0.23
Backhoe Operator
2019-11-19
Respirable dust, <.1mg
0
Cleanup Man
2018-08-22
Nuisance dust, respirable, <1% Qtz
0.13
10
0.01
Truck Driver
2018-08-22
Respirable dust, <.1mg
0
Bulldozer 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
12
2025
11
2024
12
2023
8
2022
13
2021
10
2020
11
2019
12
2018
7
2017
7
2016
7
Source: MSHA quarterly employment and production, updated weekly.
Otterville Quarry sits in Cooper County, Missouri, 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.
Cooper County, Missouri · Population 16,835
0.1%
Mining share of county employment
$67,548
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