← Madden Materials Knowlton Plant

Madden Materials Knowlton Plant safety activity

MSHA violations, accident reports and inspections.

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

Safety activity

  1. Regular Safety and Health Inspection

    inspectionRecord F043C84

    14.0 on-site hours reported

  2. Slip or fall of person

    accidentRecord 220261030017

    Days away from work only

    Accident narrative

    Employee slipped carrying 2 gallon can of oil at the topsoil screener and sprained ankle

  3. Machinery

    accidentRecord 220260220015

    Days restricted activity only

    Accident narrative

    On 1/6 Miner reported soreness to shoulder from welding on 1/4 for an extended period of time in an awkward position inside primary screen deck. Miner was treated conservatively with ice and stretching and continued work duties. On 1/14 incident became reportable when medical evaluation prescribed physical therapy.

  4. Examination of working places.

    violationRecord 9994712

    30 CFR 56.18002(a)(1) · $151.00 proposed penalty

  5. Regular Safety and Health Inspection

    inspectionRecord F01D5A2

    8.3 on-site hours reported

  6. Housekeeping.

    violationRecord 9994711

    30 CFR 56.20003(a) · Significant and substantial (S&S) · $959.00 proposed penalty

  7. Spot Inspection

    inspectionRecord F01B1C1

    13.0 on-site hours reported

  8. Regular Safety and Health Inspection

    inspectionRecord F01B0C5

    13.0 on-site hours reported

  9. Housekeeping.

    violationRecord 9994953

    30 CFR 56.20003(a) · $209.00 proposed penalty

  10. Housekeeping.

    violationRecord 9994952

    30 CFR 56.20003(a) · $209.00 proposed penalty

  11. Barricades and warning signs.

    violationRecord 9994951

    30 CFR 56.20011 · $209.00 proposed penalty

  12. Testing grounding systems.

    violationRecord 9994950

    30 CFR 56.12028 · $697.00 proposed penalty

  13. Horns and backup alarms.

    violationRecord 9994949

    30 CFR 56.14132 · $209.00 proposed penalty

  14. Safe access.

    violationRecord 9994948

    30 CFR 56.11001 · $209.00 proposed penalty

  15. Compliance Follow-up Inspection

    inspectionRecord F01B0AA

    0.5 on-site hours reported

  16. Safe access.

    violationRecord 9994855

    30 CFR 56.11001 · $209.00 proposed penalty

  17. Regular Safety and Health Inspection

    inspectionRecord F01B0A7

    1.5 on-site hours reported

  18. Housekeeping.

    violationRecord 9994854

    30 CFR 56.20003(a) · $209.00 proposed penalty

  19. Protection for openings around travelways.

    violationRecord 9994853

    30 CFR 56.11012 · $697.00 proposed penalty

  20. Moving machine parts.

    violationRecord 9994852

    30 CFR 56.14107(a) · $313.00 proposed penalty

  21. Inspection and cover plates.

    violationRecord 9994851

    30 CFR 56.12032 · $697.00 proposed penalty

  22. Identification of power switches.

    violationRecord 9994850

    30 CFR 56.12018 · $697.00 proposed penalty

  23. Berms or guardrails.

    violationRecord 9994849

    30 CFR 56.9300(a) · $697.00 proposed penalty

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.

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.