ALL STATUSES / OPERATOR PORTFOLIO

Imerys Perlite USA, Inc.

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

MSHA OPERATOR IDL14728

MINE PORTFOLIO

6 of 6 mines and facilities

2025-01-01 – 2026-10-17. All statuses records; production reporting is not required.

MineLocation / typeCoal · short tonsHours workedViolationsAccident recordsOn-site inspection hours
No Agua Mine & Mill2900248 · IntermittentTaos, NMSurface · MSHA: Perlite——10429.3
Superior Pit & Mill0201136 · ActivePinal, AZSurface · MSHA: Perlite——3012.5
Tucker Hill Mill3503433 · ActiveLake, ORFacility · MSHA: Perlite——12026.0
TUCKER HILL QUARRY3503432 · ActiveLake, ORSurface · MSHA: Perlite——11032.8
Antonito Plant0501883 · AbandonedConejos, COSurface · MSHA: Perlite——00—
Black Springs Mine4202215 · AbandonedBeaver, UTSurface · MSHA: Perlite——00—

LOCATION

Portfolio map

6 of 6 mines with usable MSHA coordinates. Select a marker to open a mine.

Mine coordinates

2025-01-01 – 2026-10-17Applies to production, safety and portfolio metrics. Silica samples have separate filters.

Violations

36

7 significant & substantial (S&S)

  1. 2025 Q14
  2. 2025 Q25
  3. 2025 Q30
  4. 2025 Q40
  5. 2026 Q19
  6. 2026 Q26
  7. 2026 Q311
  8. 2026 Q4 *1

Accident records

4

0 records classified as fatality

  1. 2025 Q12
  2. 2025 Q20
  3. 2025 Q30
  4. 2025 Q40
  5. 2026 Q10
  6. 2026 Q21
  7. 2026 Q31
  8. 2026 Q4 *0

Proposed penalties · USD

15,044.00

35 of 36 violations with amounts

  1. 2025 Q17,189
  2. 2025 Q2755
  3. 2025 Q3—
  4. 2025 Q4—
  5. 2026 Q11,385
  6. 2026 Q22,542
  7. 2026 Q33,173
  8. 2026 Q4 *—

On-site inspection hours

100.50

18 inspections · 18 with hours

  1. 2025 Q17.00
  2. 2025 Q214.75
  3. 2025 Q3—
  4. 2025 Q4—
  5. 2026 Q125.00
  6. 2026 Q211.50
  7. 2026 Q342.25
  8. 2026 Q4 *0.00
Quarterly safety data
QuarterViolationsS&SProposed USDAccident recordsFatality recordsInspectionsOn-site hours
2025-Q1437,189.002027.0
2025-Q250755.0000314.8
2025-Q300—000—
2025-Q400—000—
2026-Q1901,385.0000525.0
2026-Q2602,542.0010211.5
2026-Q31143,173.0010542.3
2026-Q4 *10—0010.0

Most cited CFR sections

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

Safety activity

  1. inspectionF050309
    TUCKER HILL QUARRY · 3503432

    Non-Injury Accident Investigation · 0.0 on-site hours

  2. violation5100588
    TUCKER HILL QUARRY · 3503432

    Description not reported

  3. inspectionF03DE53
    No Agua Mine & Mill · 2900248

    Verbal Hazard Complaint Inspections · 10.8 on-site hours

  4. inspectionF047365
    Superior Pit & Mill · 0201136

    Regular Safety and Health Inspection · 5.5 on-site hours

  5. accident220262310009
    No Agua Mine & Mill · 2900248

    HANDTOOLS (NONPOWERED) · DAYS AWAY FROM WORK ONLY

    Accident narrative

    The employee was using a chain fall hoist to horizontally move a separator along a beam. The separator repeatedly became bound, and during the binds jerked on the employee. After one of the binds in the chain, the employee reported feeling a burning in EE's right shoulder from the jerk of the chain. Employee was temporarily diagnosed with a rotator cuff injury.

  6. inspectionF03C88C
    Tucker Hill Mill · 3503433

    Regular Safety and Health Inspection · 13.0 on-site hours

  7. violation5160537
    Tucker Hill Mill · 3503433

    56.14112(b) · $151.00 proposed

  8. violation5160536
    Tucker Hill Mill · 3503433

    56.14112(b) · $151.00 proposed

  9. violation5160535
    Tucker Hill Mill · 3503433

    56.4100(b) · $177.00 proposed

  10. violation5160534
    Tucker Hill Mill · 3503433

    56.14200 · S&S · $883.00 proposed

  11. violation5160533
    Tucker Hill Mill · 3503433

    56.14207 · $151.00 proposed

  12. violation5160532
    Tucker Hill Mill · 3503433

    56.20014 · $151.00 proposed

  13. violation5160531
    Tucker Hill Mill · 3503433

    56.12032 · $151.00 proposed

  14. inspectionF03C88A
    TUCKER HILL QUARRY · 3503432

    Compliance Follow-up Inspection · 1.8 on-site hours

  15. violation5160527
    TUCKER HILL QUARRY · 3503432

    56.14101(a)(3) · S&S · $755.00 proposed

  16. violation5160526
    TUCKER HILL QUARRY · 3503432

    56.11001 · S&S · $226.00 proposed

  17. violation5160525
    TUCKER HILL QUARRY · 3503432

    56.4201(a)(1) · $151.00 proposed

  18. violation5160524
    TUCKER HILL QUARRY · 3503432

    56.9300(b) · S&S · $226.00 proposed

  19. inspectionF03C886
    TUCKER HILL QUARRY · 3503432

    Regular Safety and Health Inspection · 11.3 on-site hours

  20. accident220261760003
    No Agua Mine & Mill · 2900248

    SLIP OR FALL OF PERSON · DAYS RESTRICTED ACTIVITY ONLY

    Accident narrative

    Wash out

  21. inspectionF026ED9
    No Agua Mine & Mill · 2900248

    Compliance Follow-up Inspection · 1.3 on-site hours

  22. violation5173831
    No Agua Mine & Mill · 2900248

    56.20003(a) · $209.00 proposed

  23. violation5173830
    No Agua Mine & Mill · 2900248

    56.12032 · $697.00 proposed

  24. violation5173829
    No Agua Mine & Mill · 2900248

    56.12018 · $697.00 proposed

  25. inspectionF0247B5
    No Agua Mine & Mill · 2900248

    Regular Safety and Health Inspection · 10.3 on-site hours

Safety sources and definitions

MSHA Violations (issue date), Accidents (accident date), and Inspections (begin date). Snapshot 2026-10-17.

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.