# FALL OF ROOF OR BACK
> MSHA accident `220083590002` · 12/20/2008 · Peabody Twentymile Mining LLC
## 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:** Peabody Energy Corporation
- **Operator:** Peabody Twentymile Mining LLC
- **Mine:** [0503836](https://api.ai-analytics.org/mine/0503836)
## Narrative

An unplanned roof fall at the anchorage zone where 6 ft. bolts are in use.  The fall is approximately 20 ft. wide by 21 ft. long by 6 ft. high in 22 Right, Crosscut 115+14, adjacent to #1 Entry.  No apparent contributing factors were identified.  Cracks in the adjacent entry indicate floor heaving but the roof appears to be adequately supported with rock props and timber.

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