---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-22-016709"
form_type: "8-K"
ticker: "MLM"
cik: "0000916076"
company_name: "MARTIN MARIETTA MATERIALS INC"
filed_at: "2022-08-11T23:59:59+00:00"
generated_at: "2026-06-24T01:15:50.294903+00:00"
event_type: "regulatory"
sentiment: "negative"
materiality_score: 0.25
calibrated_materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# Martin Marietta receives MSHA imminent-danger order at Texas sand mine for unsafe conveyor cleaning

## Summary
- MSHA issued section 107(a) order at Martin Marietta's Tin Top sand and gravel mine in Weatherford, TX.
- Violation involved miner cleaning under a moving conveyor belt tail pulley, creating risk of entanglement.
- Corrective action taken; no injuries occurred from the cited incident.
- Order received July 28, 2022; reported via SEC Form 8-K on August 11, 2022.

## SEC filing metadata
- accession: 0000950170-22-016709
- form_type: 8-K
- ticker: MLM
- cik: 0000916076
- company_name: MARTIN MARIETTA MATERIALS INC
- filed_at: 2022-08-11T23:59:59+00:00
- event_type: regulatory
- sentiment: negative
- materiality_score: 0.25
- calibrated_materiality_score: 0.25
- confidence: high
- sec_items: 1.04
- EDGAR index: https://www.sec.gov/Archives/edgar/data/916076/000095017022016709/0000950170-22-016709-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/916076/000095017022016709/mlm-20220728.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-22-016709
- JSON: https://secwatch.observer/filing/0000950170-22-016709.json
- Plain text: https://secwatch.observer/filing/0000950170-22-016709.txt

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