ALL STATUSES / OPERATOR PORTFOLIO

Unimin Corp

Membership and operating status are from the latest MSHA Mines snapshot. Open a mine for its ownership history.

MSHA OPERATOR IDL00645

MINE PORTFOLIO

16 of 16 mines and facilities

2025-01-01 – 2026-10-13. All statuses records; production reporting is not required.

MineLocation / typeCoal · short tonsHours workedViolationsAccident recordsOn-site inspection hours
CAMDEN PLANT4000792 · AbandonedBenton, TNSurface · MSHA: Construction Sand and Gravel——00—
Carroll County Operations4001286 · AbandonedCarroll, TNSurface · MSHA: Common Clays NEC——00—
Downtown Clay Operation3101077 · AbandonedMitchell, NCFacility · MSHA: Common Clays NEC——00—
Festus Plant2300704 · AbandonedJefferson, MOSurface · MSHA: Crushed, Broken Sandstone——00—
Hamilton Mill4500779 · AbandonedSkagit, WASurface · MSHA: Olivine——00—
Kasota Plant2102836 · AbandonedLe Sueur, MNSurface · MSHA: Crushed, Broken Sandstone——00—
PLANT #13100678 · AbandonedYancey, NCSurface · MSHA: Olivine——00—
Plant 23101416 · AbandonedMitchell, NCFacility · MSHA: Olivine——00—
Schoolhouse Research & Development3102001 · AbandonedAvery, NCSurface · MSHA: Feldspar——00—
Sledge Mine2200630 · AbandonedQuitman, MSSurface · MSHA: Fire Clay——00—
Unimin Analytical Services Laboratory1102816 · AbandonedLa Salle, ILFacility · MSHA: Crushed, Broken Sandstone——00—
Unimin Corp-Jordan Pit And Plant2102404 · AbandonedScott, MNSurface · MSHA: Crushed, Broken Sandstone——00—
Unimin Mine & Mill2300786 · AbandonedJefferson, MOUnderground · MSHA: Crushed, Broken Sandstone——00—
VanHorn4101295 · AbandonedHudspeth, TXSurface · MSHA: Talc——00—
Voca Plant4103929 · AbandonedMcculloch, TXSurface · MSHA: Construction Sand and Gravel——00—
Weakley County Mines4002513 · AbandonedWeakley, TNSurface · MSHA: Common Clays NEC——00—

LOCATION

Portfolio map

8 of 16 mines with usable MSHA coordinates. Select a marker to open a mine.

Mine coordinates

2025-01-01 – 2026-10-13Applies to production, safety and portfolio metrics. Silica samples have separate filters.

Violations

0

0 significant & substantial (S&S)

  1. 2025 Q10
  2. 2025 Q20
  3. 2025 Q30
  4. 2025 Q40
  5. 2026 Q10
  6. 2026 Q20
  7. 2026 Q30
  8. 2026 Q4 *0

Accident records

0

0 records classified as fatality

  1. 2025 Q10
  2. 2025 Q20
  3. 2025 Q30
  4. 2025 Q40
  5. 2026 Q10
  6. 2026 Q20
  7. 2026 Q30
  8. 2026 Q4 *0

Proposed penalties · USD

—

0 of 0 violations with amounts

  1. 2025 Q1—
  2. 2025 Q2—
  3. 2025 Q3—
  4. 2025 Q4—
  5. 2026 Q1—
  6. 2026 Q2—
  7. 2026 Q3—
  8. 2026 Q4 *—

On-site inspection hours

—

0 inspections · 0 with hours

  1. 2025 Q1—
  2. 2025 Q2—
  3. 2025 Q3—
  4. 2025 Q4—
  5. 2026 Q1—
  6. 2026 Q2—
  7. 2026 Q3—
  8. 2026 Q4 *—
Quarterly safety data
QuarterViolationsS&SProposed USDAccident recordsFatality recordsInspectionsOn-site hours
2025-Q100—000—
2025-Q200—000—
2025-Q300—000—
2025-Q400—000—
2026-Q100—000—
2026-Q200—000—
2026-Q300—000—
2026-Q4 *00—000—

Most cited CFR sections

All violations issued in the selected period. Counts combine subsections.

SectionViolationsS&S

No violation records in this period.

Safety activity

    No matching records in this period.

    Safety sources and definitions

    MSHA Violations (issue date), Accidents (accident date), and Inspections (begin date). Snapshot 2026-10-13.

    Counts describe published rows, including contractor records; accident records are not distinct incidents or numbers of people injured.

    Zero means no matching records in the imported sources, not proof of no events. Historical coverage differs by source; absence before a source begins reporting is not a zero incident rate. Invalid or absent dates and records after the snapshot are excluded.

    S&S means SIG_SUB=Y. Fatality records use DEGREE_INJURY_CD=01. Proposed penalties are not final assessed or paid amounts; missing dollar values are omitted.

    Inspection hours are SUM_TOTAL_ON_SITE_HOURS attributed to the inspection start date, without supervisor/trainee hours. Missing hours are omitted; a started inspection may still be open.

    Portfolio totals use current mine membership, including events before the current owner or operator's tenure.

    CFR headings link to the current Title 30 index; they are not historical legal determinations.

    SELECTED PORTFOLIO

    1 linked controller.

    Relationships reflect the selected mine status and current MSHA controller/operator fields.