# FALL OF ROOF OR BACK
> MSHA accident `220121440005` · 05/11/2012 · U.S. Silver-Idaho, Inc.
## 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:** U S Silver Corporation
- **Operator:** U.S. Silver-Idaho, Inc.
- **Mine:** [1000082](https://api.ai-analytics.org/mine/1000082)
## Narrative

We experienced a rock burst in the 168 stope on 4600 level which shattered rock on the footwall rib approximately 2' to 4' deep for a distance of about 16' in length. Rock also appeared to have been pushed up from the sill creating a muckpile approximately 3' to 4'high. There was no apparent damage to the back except some surface cracking of the cemented backfill. No crew present.

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