ACTIVE / OPERATOR PORTFOLIO

Martin Marietta Minerals, Inc.

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

MSHA OPERATOR IDL13547

MINE PORTFOLIO

3 of 3 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
Crawford Mine & Mill4100991 · ActiveMclennan, TXSurface · MSHA: Crushed, Broken Limestone NEC——20279.3
Marble Falls Plant4103190 · ActiveBurnet, TXFacility · MSHA: Lime——46394.5
Nolanville Mine & Mill4101786 · ActiveBell, TXSurface · MSHA: Crushed, Broken Limestone NEC——22071.3

LOCATION

Portfolio map

3 of 3 mines 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

88

12 significant & substantial (S&S)

  1. 2025 Q123
  2. 2025 Q211
  3. 2025 Q310
  4. 2025 Q414
  5. 2026 Q16
  6. 2026 Q218
  7. 2026 Q36
  8. 2026 Q4 *0

Accident records

5

0 records classified as fatality

  1. 2025 Q12
  2. 2025 Q20
  3. 2025 Q32
  4. 2025 Q40
  5. 2026 Q10
  6. 2026 Q20
  7. 2026 Q31
  8. 2026 Q4 *0

Proposed penalties · USD

39,307.00

82 of 88 violations with amounts

  1. 2025 Q16,353
  2. 2025 Q22,114
  3. 2025 Q33,179
  4. 2025 Q46,798
  5. 2026 Q11,043
  6. 2026 Q219,820
  7. 2026 Q3—
  8. 2026 Q4 *—

On-site inspection hours

245.00

18 inspections · 18 with hours

  1. 2025 Q179.00
  2. 2025 Q241.75
  3. 2025 Q331.50
  4. 2025 Q430.50
  5. 2026 Q117.50
  6. 2026 Q232.25
  7. 2026 Q312.50
  8. 2026 Q4 *—
Quarterly safety data
QuarterViolationsS&SProposed USDAccident recordsFatality recordsInspectionsOn-site hours
2025-Q12306,353.0020379.0
2025-Q21132,114.0000241.8
2025-Q31013,179.0020331.5
2025-Q41436,798.0000230.5
2026-Q1611,043.0000217.5
2026-Q218419,820.0000532.3
2026-Q360—10112.5
2026-Q4 *00—000—

Most cited CFR sections

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

Safety activity

  1. violation5179666
    Nolanville Mine & Mill · 4101786

    56.4200(b)(1)

  2. inspectionF041771
    Nolanville Mine & Mill · 4101786

    Regular Safety and Health Inspection · 12.5 on-site hours

  3. violation5179665
    Nolanville Mine & Mill · 4101786

    56.4203

  4. violation5179664
    Nolanville Mine & Mill · 4101786

    47.41(a)

  5. violation5179663
    Nolanville Mine & Mill · 4101786

    47.41(a)(1)

  6. violation5179662
    Nolanville Mine & Mill · 4101786

    56.14206(b)

  7. violation5179661
    Nolanville Mine & Mill · 4101786

    56.14207

  8. accident220262310008
    Marble Falls Plant · 4103190

    HANDTOOLS (NONPOWERED) · NO DYS AWY FRM WRK,NO RSTR ACT

    Accident narrative

    Employee was trying to clear a rock that was stuck in the head pulley of the 2320 conveyor when the hammer EE was using came in contact with EE's right index finger causing a laceration to EE's right knuckle requiring 4 stitches.

  9. violation5173570
    Crawford Mine & Mill · 4100991

    56.12004 · $432.00 proposed

  10. violation5173569
    Crawford Mine & Mill · 4100991

    56.4104(b) · $193.00 proposed

  11. violation5173568
    Crawford Mine & Mill · 4100991

    56.12025 · $151.00 proposed

  12. violation5173567
    Crawford Mine & Mill · 4100991

    56.13011 · $151.00 proposed

  13. violation5173566
    Crawford Mine & Mill · 4100991

    56.14207 · $193.00 proposed

  14. inspectionF026686
    Crawford Mine & Mill · 4100991

    Regular Safety and Health Inspection · 12.0 on-site hours

  15. violation5173565
    Crawford Mine & Mill · 4100991

    56.11001 · $151.00 proposed

  16. inspectionF026684
    Marble Falls Plant · 4103190

    Compliance Follow-up Inspection · 0.0 on-site hours

  17. inspectionF031A52
    Crawford Mine & Mill · 4100991

    Compliance Follow-up Inspection · 1.0 on-site hours

  18. violation5173548
    Marble Falls Plant · 4103190

    56.12006 · $1,431.00 proposed

  19. violation5173547
    Marble Falls Plant · 4103190

    56.12004 · S&S · $7,084.00 proposed

  20. violation5173546
    Marble Falls Plant · 4103190

    56.12032 · $432.00 proposed

  21. violation5173545
    Marble Falls Plant · 4103190

    56.14107(a) · S&S · $3,184.00 proposed

  22. violation5173544
    Marble Falls Plant · 4103190

    56.14205 · $432.00 proposed

  23. violation5173543
    Marble Falls Plant · 4103190

    56.4101 · $642.00 proposed

  24. violation5173542
    Marble Falls Plant · 4103190

    56.18002(a) · S&S · $3,184.00 proposed

  25. violation5173541
    Marble Falls Plant · 4103190

    56.12028 · $432.00 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.