# FALL OF ROOF OR BACK
> MSHA accident `220130520023` · 02/08/2013 · Rio Grande Mining Company
## Details
- **Degree of injury:** ACCIDENT ONLY
- **Classification:** FALL OF ROOF OR BACK
- **Accident type:** Accident type, without injuries
- **Occupation:** —
- **Activity:** —
- **Injury source:** —
- **Nature of injury:** —
- **Body part:** —
- **Days lost:** 0
- **Mine experience:** — years
## Operator
- **Controller:** Aurcana Corporation
- **Operator:** Rio Grande Mining Company
- **Mine:** [4102905](https://api.ai-analytics.org/mine/4102905)
## Narrative

A roof fall occurred at the 5200 level crosscut #4, a 5ft. x 6ft. x 4ft. wedge came down from the back at the #4 crosscut nose pillar. Approximately eight(8)ft. split set rock bolts failed from the anchorage zone. The fall did not impede ventilation, travel-ways and / or entrapment. No injuries were sustained. MSHA

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