# FALL OF ROOF OR BACK
> MSHA accident `220090330053` · 01/14/2009 · Martin Marietta Materials 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:** Martin Marietta Materials Inc
- **Operator:** Martin Marietta Materials Inc
- **Mine:** [4608862](https://api.ai-analytics.org/mine/4608862)
## Narrative

""Dribble"" was observed in the N12 heading as a worker worked in the cross-cut V24. The ""dribbling"" continued for a period of time estimated at approximately 5 minutes. After that time a section of the roof fell. The material seen on the floor averaged approx. 12""-24"", and amounted to an est. 100 Tns. No damage or impairment caused.

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