---
schema_version: "secwatch.filing_event.v1"
accession: "0001739445-25-000140"
form_type: "8-K"
ticker: "ACA"
cik: "0001739445"
company_name: "Arcosa, Inc."
filed_at: "2025-12-16T23:59:59+00:00"
generated_at: "2026-05-16T13:04:40.690414+00:00"
event_type: "regulatory"
sentiment: "negative"
materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# Arcosa receives MSHA 107(a) order at DeRidder, LA aggregate site; terminated quickly, no injuries

## Summary
- MSHA issued section 107(a) order on Dec 11, 2025, at Arcosa Aggregates Gulf Coast in DeRidder, Louisiana.
- Order concerned a third-party contractor observed walking on a fuel tank without fall protection.
- Order terminated shortly after contractor was safely removed; no injuries occurred.
- Company took immediate corrective action following the incident.

## SEC filing metadata
- accession: 0001739445-25-000140
- form_type: 8-K
- ticker: ACA
- cik: 0001739445
- company_name: Arcosa, Inc.
- filed_at: 2025-12-16T23:59:59+00:00
- event_type: regulatory
- sentiment: negative
- materiality_score: 0.25
- confidence: high
- sec_items: 1.04
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1739445/000173944525000140/0001739445-25-000140-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1739445/000173944525000140/aca-20251211.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001739445-25-000140
- JSON: https://secwatch.observer/filing/0001739445-25-000140.json
- Plain text: https://secwatch.observer/filing/0001739445-25-000140.txt

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