Mining Incidents

Horner's Rock Material,LLC: 32 MSHA citations Metal/Non-Metal

Horner's Rock Material,LLC · Surface
Theodosia, Ozark County, MO  ·  Active
MSHA Mine ID: 2302593

Horner's Rock Material,LLC has $4K in proposed MSHA penalties and $3K outstanding across 1 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
0
Years on record
Latest incident
Compliance record
MSHA citations since 2025
32
citations
5
significant & substantial
$3,971
proposed penalties
$604
paid to date
15% of proposed penalties paid to date, a $3,367 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2025
6
inspections on record
125
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: 125 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Horner's Rock Material,LLC has $4K in proposed MSHA penalties and $3K outstanding across 1 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.
$4K
proposed penalties
$4K
current assessed
$604
paid to date
$3K
outstanding
4 assessments are final orders; 1 contested dockets.
As of the most recent assessment on 2026-03-10.
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.
15.6%
significant & substantial
21.9%
high negligence or reckless
15.6%
reasonably likely or greater
31.2%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 21.9% low, 56.2% moderate, 21.9% high, 0.0% reckless.
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.
22 citations taken to the federal commission · 69% of citations on record
  • Still open 22 · 100%
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 2025-12-21.
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.
Docket Decision Judge Year Proposed / upheld
CENT 2026-0047 Decision pending
Source: FMSHRC civil penalty dockets and decisions (public record), updated weekly.
Ownership history
  1. Horner's Rock Material,LLC 2025 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 5
2025 4
Source: MSHA quarterly employment and production, updated weekly.

Horner's Rock Material,LLC sits in Ozark County, Missouri, where the Census mining category is 0.0% 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.
Ozark County, Missouri · Population 8,773
0.0%
Mining share of county employment
$42,329
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 2,081 0 0 0.0
2026 Q1 2,032 4 0 1968.5
2025 Q4 2,523 0 0 0.0
2025 Q3 2,160 19 2 8796.3
2025 Q2 305 0 0 0.0
2025 Q1 101 3 0 29703.0

No reportable incidents on file.

MSHA has no recorded reportable accidents for this mine in the current dataset. New reports appear here within a week of being filed.