Imerys Wollastonite USA, LLC operator
Controlled by
Imerys S A
MSHA operator ID: 0157233
- Fatalities
- 0
- Total incidents
- 8
- Mines on record
- 1
- Years on record
- 2022–2026
Compliance record
MSHA citations since 2019
381
citations
77
significant & substantial
$312,952
proposed penalties
$267,073
paid to date
85% of proposed penalties paid to date, a $45,879 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2018
34
inspections on record
2,094
inspection hours
18.2
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.381 citations across 2,094 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.$313K
proposed penalties
$267K
current assessed
$267K
paid to date
$0
outstanding
339 assessments are final orders; 2 contested dockets.
As of the most recent assessment on 2026-03-12.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
Top causes
- SLIP OR FALL OF PERSON 4 non-fatal
- HANDLING OF MATERIALS 3 non-fatal
- DISORDERS (REPEATED TRAUMA) 1 non-fatal
Incident timeline
2026
3
2025
1
2024
2
2023
1
2022
1
Mines on record
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The full compliance file on Imerys Wollastonite USA, 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.