# MACHINERY
> MSHA accident `220220900018` · 03/27/2022 · Heidelberg Materials US Cement LLC
## Details
- **Degree of injury:** ACCIDENT ONLY
- **Classification:** MACHINERY
- **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

K2 Coal Mill fans stopped operating around 10:30 am. Once fans were fixed the operators tried to start the coal mill. When they bumped the motor, the system over pressurized and opened the rupture disk which opens at 1.5 psi. No injuries or damage occurred. 

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