# INUNDATION
> MSHA accident `220203500028` · 12/07/2020 · Heidelberg Materials US Cement LLC
## Details
- **Degree of injury:** ACCIDENT ONLY
- **Classification:** INUNDATION
- **Accident type:** Accident type, without injuries
- **Occupation:** —
- **Activity:** —
- **Injury source:** —
- **Nature of injury:** —
- **Body part:** —
- **Days lost:** —
- **Mine experience:** — years
## Operator
- **Controller:** Heidelberg Materials AG
- **Operator:** Heidelberg Materials US Cement LLC
- **Mine:** [1200063](https://api.ai-analytics.org/mine/1200063)
## Narrative

#1 kiln was running in a normal state when the Process Supervisor noticed that the coal mill CO at the mill inlet was reading approximately 100 ppm CO The operator cut the coal feed to the coal mill.  As soon as the Kiln Operator stopped the feed of coal to the coal mill EE received an alarm that the coal mill rupture vent was open.

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*Source: [MSHA Open Government Data](https://arlweb.msha.gov/OpenGovernmentData/) · AI Analytics · CC0 1.0*