# FALL OF ROOF OR BACK
> MSHA accident `220051450025` · 05/06/2005 · Hecla Greens Creek 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:** Rio Tinto Group
- **Operator:** Hecla Greens Creek Mining Company
- **Mine:** [5001267](https://api.ai-analytics.org/mine/5001267)
## Narrative

A fall of ground occurred at the 30/31 decline intersection that was beyond the extent of the installed ground support.  The failure plane was noted as a regional plane foliation, extending above the curent ground support depth. Geological observation revealed F2 folding striking north/northwest parellel to the orientation of the 30 decline. Approximately 400 tons of ground fell.

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