73% of proposed penalties paid to date, a $176,817 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
342
inspections on record
18,119
inspection hours
9.9
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.
1,788 citations across 18,119 inspection hours.
Source: MSHA inspections data, updated weekly.
Penalty disposition
ⓘDifferences between proposed and paid penalties reflect both settlements and conference reductions and amounts still owed. Outstanding is the balance currently owed.
$665K
proposed penalties
$605K
current assessed
$488K
paid to date
$117K
outstanding
1,742 assessments are final orders; 20 contested dockets.
As of the most recent assessment on 2026-04-29.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
O-N Minerals (Michigan) Company · Caught in, under or between a moving and a stationary object
Supervisor pick-up was struck by haul truck, resulting in a fatality.
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The full compliance file on O-N Minerals (Michigan) Company
A dated report covering the 26-year penalty trail, line-item violation pattern, contest and
docket posture, rate-normalized peer benchmark, and full fatality history. Delivered as a PDF
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