---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-24-083175"
form_type: "8-K"
ticker: "MLM"
cik: "0000916076"
company_name: "MARTIN MARIETTA MATERIALS INC"
filed_at: "2024-07-12T23:59:59+00:00"
generated_at: "2026-05-31T21:38:25.883058+00:00"
event_type: "regulatory"
sentiment: "neutral"
materiality_score: 0.1
calibrated_materiality_score: 0.1
confidence: "high"
source: SEC EDGAR
---

# Martin Marietta receives MSHA order at Walstrum Quarry for safety violation; corrective action taken

## Summary
- MSHA issued section 107(a) order at Walstrum Quarry in Idaho Springs, CO on July 8, 2024.
- Truck driver walked on top of truck to level aggregate without fall protection or PPE.
- No injuries occurred; corrective action was taken and order terminated.

## SEC filing metadata
- accession: 0000950170-24-083175
- form_type: 8-K
- ticker: MLM
- cik: 0000916076
- company_name: MARTIN MARIETTA MATERIALS INC
- filed_at: 2024-07-12T23:59:59+00:00
- event_type: regulatory
- sentiment: neutral
- materiality_score: 0.1
- calibrated_materiality_score: 0.1
- confidence: high
- sec_items: 1.04
- EDGAR index: https://www.sec.gov/Archives/edgar/data/916076/000095017024083175/0000950170-24-083175-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/916076/000095017024083175/mlm-20240708.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-24-083175
- JSON: https://secwatch.observer/filing/0000950170-24-083175.json
- Plain text: https://secwatch.observer/filing/0000950170-24-083175.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.