# MACHINERY
> MSHA accident `220070940021` · 03/23/2007 · Premier Silica LLC
## Details
- **Degree of injury:** DYS AWY FRM WRK & RESTRCTD ACT
- **Classification:** MACHINERY
- **Accident type:** Struck by... NEC
- **Occupation:** Haul/Off road/Coal/Ore/Pit/Quarry/Rock/Rubber tire truck driver, Transportation truck driver
- **Activity:** Machine maintenance
- **Injury source:** JACKS-MECH,HYDRL,AIR,ETC
- **Nature of injury:** FRACTURE,CHIP
- **Body part:** LOWER LEG/TIBIA/FIBULA
- **Days lost:** 153
- **Mine experience:** 14.38 years
## Operator
- **Controller:** Oglebay Norton Company
- **Operator:** Premier Silica LLC
- **Mine:** [3301354](https://api.morvs.ai/mine/3301354)
## Narrative

Four employees were performing preventative maintenance on the aerial tram system used to transport stone from the quarry to the plant. While tensioning the steel cable used to carry the tram buckets, the hydraulic cylinder assembly pulled loose from its anchor point. One employee was fatally injured and another suffered a broken leg, after being struck by components of the system.

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