ACTIVE / OPERATOR PORTFOLIO

Martin Marietta

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

MSHA OPERATOR ID0106945

MINE PORTFOLIO

1 of 1 mines and facilities

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

MineLocation / typeCoal · short tonsHours workedViolationsAccident recordsOn-site inspection hours
Gleason Mills & Mines4000195 · ActiveWeakley, TNSurface · MSHA: Common Clays NEC——7261.3

LOCATION

Mine location

1 of 1 mine 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

7

1 significant & substantial (S&S)

  1. 2025 Q11
  2. 2025 Q21
  3. 2025 Q34
  4. 2025 Q40
  5. 2026 Q11
  6. 2026 Q20
  7. 2026 Q30
  8. 2026 Q4 *0

Accident records

2

0 records classified as fatality

  1. 2025 Q10
  2. 2025 Q20
  3. 2025 Q31
  4. 2025 Q41
  5. 2026 Q10
  6. 2026 Q20
  7. 2026 Q30
  8. 2026 Q4 *0

Proposed penalties · USD

1,304.00

7 of 7 violations with amounts

  1. 2025 Q1398
  2. 2025 Q2151
  3. 2025 Q3604
  4. 2025 Q4—
  5. 2026 Q1151
  6. 2026 Q2—
  7. 2026 Q3—
  8. 2026 Q4 *—

On-site inspection hours

61.25

5 inspections · 5 with hours

  1. 2025 Q1—
  2. 2025 Q229.50
  3. 2025 Q3—
  4. 2025 Q4—
  5. 2026 Q117.75
  6. 2026 Q212.00
  7. 2026 Q3—
  8. 2026 Q4 *2.00
Quarterly safety data
QuarterViolationsS&SProposed USDAccident recordsFatality recordsInspectionsOn-site hours
2025-Q111398.00000—
2025-Q210151.0000129.5
2025-Q340604.00100—
2025-Q400—100—
2026-Q110151.0000217.8
2026-Q200—00112.0
2026-Q300—000—
2026-Q4 *00—0012.0

Most cited CFR sections

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

Safety activity

  1. inspectionF03F891
    Gleason Mills & Mines · 4000195

    Regular Safety and Health Inspection · 2.0 on-site hours

  2. inspectionF022428
    Gleason Mills & Mines · 4000195

    Regular Safety and Health Inspection · 12.0 on-site hours

  3. inspectionF02240D
    Gleason Mills & Mines · 4000195

    Verbal Hazard Complaint Inspections · 2.0 on-site hours

  4. inspectionF022404
    Gleason Mills & Mines · 4000195

    Regular Safety and Health Inspection · 15.8 on-site hours

  5. violation9789997
    Gleason Mills & Mines · 4000195

    56.16005 · $151.00 proposed

  6. accident220253640009
    Gleason Mills & Mines · 4000195

    SLIP OR FALL OF PERSON · DYS AWY FRM WRK & RESTRCTD ACT

    Accident narrative

    Employee twisted knee while climbing stairs to the lab.

  7. accident220252250019
    Gleason Mills & Mines · 4000195

    SLIP OR FALL OF PERSON · DAYS AWAY FROM WORK ONLY

    Accident narrative

    Employee was climbing down steps on off-highway haul truck and slipped. When employee caught themselves on the rail, they injured their left shoulder.

  8. violation9789242
    Gleason Mills & Mines · 4000195

    56.14100(b) · $151.00 proposed

  9. violation9789241
    Gleason Mills & Mines · 4000195

    56.12020 · $151.00 proposed

  10. violation9789240
    Gleason Mills & Mines · 4000195

    47.41(a) · $151.00 proposed

  11. violation9789239
    Gleason Mills & Mines · 4000195

    56.20003(a) · $151.00 proposed

  12. inspectionF009838
    Gleason Mills & Mines · 4000195

    Regular Safety and Health Inspection · 29.5 on-site hours

  13. violation9789238
    Gleason Mills & Mines · 4000195

    56.4104(a) · $151.00 proposed

  14. violation9786468
    Gleason Mills & Mines · 4000195

    56.14112(b) · S&S · $398.00 proposed

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.