# MACHINERY
> MSHA accident `220173550002` · 12/12/2017 · St. Marys Cement U.S. LLC
## Details
- **Degree of injury:** DAYS RESTRICTED ACTIVITY ONLY
- **Classification:** MACHINERY
- **Accident type:** Over-exertion NEC
- **Occupation:** Utility man, Shift tech, Service/Dump truck operator
- **Activity:** Hand tools (powered)
- **Injury source:** DRIL-PRCUSV,HRD ROC,JKHMR
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** SHOULDERS (COLLARBONE/CLAVICLE/SCAPULA)
- **Days lost:** 0
- **Mine experience:** 0.46 years
## Operator
- **Controller:** VOTORANTIM CIMENTOS
- **Operator:** St. Marys Cement U.S. LLC
- **Mine:** [1100118](https://api.ai-analytics.org/mine/1100118)
## Narrative

When clearing the preheat tower, an employee was using a jack hammer to try and clear a large build up. When it came loose, the combined weight of the jack hammer and the chunk twisting as it fell sprained the employee's shoulder. Employee was seen by a doctor that day and placed on restricted duty. 

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