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O-N Minerals (Chemstone Company) safety activity

MSHA violations, accident reports and inspections across the current mine portfolio.

2025-01-01 – 2026-10-28Database snapshot · 2026-10-28

Safety activity

  1. Non-Chargeable Accident Investigation

    inspectionRecord F02A6B1
    Plant #2 · 4400064

    2.0 on-site hours reported

  2. Regular Safety and Health Inspection

    inspectionRecord F009796
    Strasburg Quarry · 4400026

    30.0 on-site hours reported

  3. Regular Safety and Health Inspection

    inspectionRecord F009792
    Winchester Plant · 4400044

    45.0 on-site hours reported

  4. Safety defects; examination, correction and records.

    violationRecord 8284134
    Middletown Quarry · 4400049

    30 CFR 56.14100(b) · $151.00 proposed penalty

  5. Regular Safety and Health Inspection

    inspectionRecord F00978F
    Middletown Quarry · 4400049

    15.0 on-site hours reported

  6. Regular Safety and Health Inspection

    inspectionRecord F0249DB
    Rocky Point · 4400065

    23.0 on-site hours reported

  7. Regular Safety and Health Inspection

    inspectionRecord F0249DA
    Plant #2 · 4400064

    30.8 on-site hours reported

  8. Electrical conductors.

    violationRecord 8281943
    Winchester Plant · 4400044

    30 CFR 56.12004 · $151.00 proposed penalty

  9. Inspection and cover plates.

    violationRecord 8281942
    Winchester Plant · 4400044

    30 CFR 56.12032 · $151.00 proposed penalty

  10. Regular Safety and Health Inspection

    inspectionRecord F010E50
    Winchester Plant · 4400044

    42.5 on-site hours reported

  11. Regular Safety and Health Inspection

    inspectionRecord F00977F
    Middletown Quarry · 4400049

    18.0 on-site hours reported

  12. Construction and maintenance of guards.

    violationRecord 8281937
    Strasburg Quarry · 4400026

    30 CFR 56.14112(b) · $151.00 proposed penalty

  13. Regular Safety and Health Inspection

    inspectionRecord F010E4D
    Strasburg Quarry · 4400026

    24.0 on-site hours reported

  14. Handtools (nonpowered)

    accidentRecord 220260400031
    Plant #2 · 4400064

    No dys awy frm wrk,no rstr act

    Accident narrative

    EE states that while using a pocketknife to cut tape, the blade did not lock fully and folded into left hand resulting in a small cut. The EE was taken to urgent care which resulted in the application of 1 stitch.

  15. Regular Safety and Health Inspection

    inspectionRecord F00603F
    Plant #2 · 4400064

    10.5 on-site hours reported

  16. Regular Safety and Health Inspection

    inspectionRecord F00603E
    Rocky Point · 4400065

    14.5 on-site hours reported

  17. Slip or fall of person

    accidentRecord 220260120002
    Middletown Quarry · 4400049

    Days restricted activity only

    Accident narrative

    EE states that while pulling water hose to back to hose reel on water truck that the EE's foot hooked a frozen clump of material, causing a fall to the ground on EE's left side. EE was seen at urgent care and was issued restrictions due to limited mobility and pain in left shoulder and left thigh.

  18. Spot Inspection

    inspectionRecord F006037
    Strasburg Quarry · 4400026

    11.0 on-site hours reported

  19. Spot Inspection

    inspectionRecord F0293BE
    Middletown Quarry · 4400049

    10.5 on-site hours reported

  20. Insulation and fittings for power wires and cables.

    violationRecord 8281932
    Strasburg Quarry · 4400026

    30 CFR 56.12008 · $151.00 proposed penalty

  21. Regular Safety and Health Inspection

    inspectionRecord F00BC6F
    Strasburg Quarry · 4400026

    36.5 on-site hours reported

  22. Safety defects; examination, correction and records.

    violationRecord 8281924
    Winchester Plant · 4400044

    30 CFR 56.14100(b) · $151.00 proposed penalty

  23. Regular Safety and Health Inspection

    inspectionRecord F00BC6C
    Winchester Plant · 4400044

    55.8 on-site hours reported

  24. Regular Safety and Health Inspection

    inspectionRecord 4135559
    Plant #2 · 4400064

    21.0 on-site hours reported

  25. Regular Safety and Health Inspection

    inspectionRecord F00BC69
    Middletown Quarry · 4400049

    19.0 on-site hours reported

Sources and definitions

MSHA Violations (issue date), Accidents (accident date) and Inspections (begin date).

Violation titles use current CFR headings to identify the cited rule; they are not the inspector’s account of what happened.

Status is from the current MSHA Mines snapshot, not the selected reporting period. Closed records can retain their last reported controller/operator.

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.