O-N Minerals Portage Company LLC operator
Controlled by
Carmeuse Holding SA
MSHA operator ID: L17923
- Fatalities
- 0
- Total incidents
- 12
- Mines on record
- 1
- Years on record
- 2004–2026
Compliance record
MSHA citations since 2001
152
citations
34
significant & substantial
$34,283
proposed penalties
$33,897
paid to date
99% of proposed penalties paid to date, a $386 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2001
61
inspections on record
1,065
inspection hours
14.3
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.152 citations across 1,065 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.$34K
proposed penalties
$34K
current assessed
$34K
paid to date
$0
outstanding
151 assessments are final orders; 1 contested dockets.
As of the most recent assessment on 2026-02-12.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
Top causes
- HANDLING OF MATERIALS 4 non-fatal
- MACHINERY 2 non-fatal
- ELECTRICAL 1 non-fatal
- HANDTOOLS (NONPOWERED) 1 non-fatal
- NONPOWERED HAULAGE 1 non-fatal
- OTHER 1 non-fatal
Incident timeline
2026
1
2024
1
2016
3
2015
1
2014
1
2012
1
2009
1
2005
1
2004
2
Mines on record
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For insurers, brokers, and safety consultants
The full compliance file on O-N Minerals Portage Company LLC
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 with the underlying data as CSV.