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Monarch Mountain Minerals & Aggregates, LLC safety activity

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

2025-01-01 – 2026-10-31Database snapshot · 2026-10-31

Safety activity

  1. Regular Safety and Health Inspection

    inspectionRecord F04623F
    Aquilla · 4105521

    12.8 on-site hours reported

  2. Blocking equipment in a raised position.

    violationRecord 5251020
    Aquilla · 4105521

    30 CFR 56.14211(c) · Significant and substantial (S&S)

  3. Identification of power switches.

    violationRecord 5251019
    Aquilla · 4105521

    30 CFR 56.12018

  4. Housekeeping.

    violationRecord 5251018
    Aquilla · 4105521

    30 CFR 56.20003(a)

  5. First-aid materials.

    violationRecord 5251017
    Aquilla · 4105521

    30 CFR 56.15001

  6. 103 (g) Written Notification Hazard Complaint Inspectio

    inspectionRecord F04623E
    Aquilla · 4105521

    3.3 on-site hours reported

  7. Regular Safety and Health Inspection

    inspectionRecord 6943681
    DENM · 0505193

    6.3 on-site hours reported

  8. Electrical conductors.

    violationRecord 5213482
    DENM · 0505193

    30 CFR 56.12004

  9. Protection for openings around travelways.

    violationRecord 5213481
    DENM · 0505193

    30 CFR 56.11012

  10. Identification of power switches.

    violationRecord 5213480
    DENM · 0505193

    30 CFR 56.12018

  11. Handling of materials

    accidentRecord 220262320014
    Aquilla · 4105521

    Days away from work only

    Accident narrative

    EE was helping remove a stuck skid steer bucket. When the bucket dislodged it fell onto the EEs leg causing it to break.

  12. Compliance Follow-up Inspection

    inspectionRecord F046223
    Aquilla · 4105521

    4.0 on-site hours reported

  13. Warning signs.

    violationRecord 5176934
    Aquilla · 4105521

    30 CFR 56.4101 · $151.00 proposed penalty

  14. Brakes.

    violationRecord 5176933
    Aquilla · 4105521

    30 CFR 56.14101(a)(2) · Significant and substantial (S&S) · $267.00 proposed penalty

  15. Safe access.

    violationRecord 5176932
    Aquilla · 4105521

    30 CFR 56.11001 · $151.00 proposed penalty

  16. Regular Safety and Health Inspection

    inspectionRecord F04621F
    Aquilla · 4105521

    9.3 on-site hours reported

  17. Regular Safety and Health Inspection

    inspectionRecord F037D82
    Glass Mountain Pumice · 0404165

    11.0 on-site hours reported

  18. Training plans.

    violationRecord 5172699
    HOUM2 - Altair · 4105598

    30 CFR 46.3(b)(4) · $151.00 proposed penalty

  19. Training plans.

    violationRecord 5172698
    HOUM2 - Altair · 4105598

    30 CFR 46.3(b)(2) · $151.00 proposed penalty

  20. Records of training.

    violationRecord 5172697
    HOUM2 - Altair · 4105598

    30 CFR 46.9(a) · $151.00 proposed penalty

  21. Regular Safety and Health Inspection

    inspectionRecord F037100
    HOUM2 - Altair · 4105598

    15.5 on-site hours reported

  22. Dropping materials from overhead.

    violationRecord 5172696
    HOUM2 - Altair · 4105598

    30 CFR 56.16010 · $151.00 proposed penalty

  23. Compliance Follow-up Inspection

    inspectionRecord F0247AF
    CERRITO PELADO · 2900936

    0.5 on-site hours reported

  24. Examination of working places.

    violationRecord 5103817
    LASM-2095 · 2602873

    30 CFR 56.18002(a) · $2,133.00 proposed penalty

  25. Regular Safety and Health Inspection

    inspectionRecord F03889D
    LASM-2095 · 2602873

    14.0 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.