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Mariana Copper One 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. Slip or fall of person

    accidentRecord 220262150018
    Lisbon Valley Mining Co · 4202406

    Days restricted activity only

    Accident narrative

    The leach pad operator was loading tools off the loading dock of the aeration building into the back of the truck, when they went to step down onto the truck step their foot slipped on the step of the pickup and they fell on their right elbow and buttock on the ground. They refused to go to the Dr. until today (7/31/26).

  2. Electrical

    accidentRecord 220261680021
    Lisbon Valley Mining Co · 4202406

    Dys awy frm wrk & restrctd act

    Accident narrative

    After disconnecting the line fuses, the electrician was attaching a wire in a 120 - 240 transformer, when EE went to tighten the nut with a ratchet an arch flash occurred causing superficial burns.

  3. Regular Safety and Health Inspection

    inspectionRecord F03AC09
    Lisbon Valley Mining Co · 4202406

    32.0 on-site hours reported

  4. Compliance Follow-up Inspection

    inspectionRecord F0211ED
    Lisbon Valley Mining Co · 4202406

    21.5 on-site hours reported

  5. Handtools (nonpowered)

    accidentRecord 220260400043
    Lisbon Valley Mining Co · 4202406

    Dys awy frm wrk & restrctd act

    Accident narrative

    While removing old teeth off a bucket from a loader the technician was striking the old tooth with a hammer and a chunk of the tooth broke off and struck the bicep of the right arm.

  6. Regular Safety and Health Inspection

    inspectionRecord F008083
    Lisbon Valley Mining Co · 4202406

    16.3 on-site hours reported

  7. Special Emphasis Programs

    inspectionRecord F00AC7A
    Lisbon Valley Mining Co · 4202406

    1.0 on-site hours reported

  8. Regular Safety and Health Inspection

    inspectionRecord F00AC74
    Lisbon Valley Mining Co · 4202406

    21.0 on-site hours reported

  9. Handling of materials

    accidentRecord 220251010004
    Lisbon Valley Mining Co · 4202406

    Days away from work only

    Accident narrative

    Employee was leveling and digging trench on the leach pad and the tops of the hands turned red and were dry and appeared to be a sunburn. After being seen EE had a reaction to the process solutions on EE's hands.

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.