# FALL OF ROOF OR BACK
> MSHA accident `220221800016` · 06/23/2022 · Bronco Utah Operations, 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:** —
- **Mine experience:** — years
## Operator
- **Controller:** Bronco Coal Resources, LLC
- **Operator:** Bronco Utah Operations, LLC.
- **Mine:** [4200079](https://api.morvs.ai/mine/4200079)
## Narrative

An unplanned Roof Fall occurred at 3:45 AM in the Intake Air Course of Main West, Entry #2 XC 21. The cave is approximately 18 ft. wide by 10 ft. long and 6 ft high. No one was injured or entrapped and no ventilation was interrupted.  Preliminary diagnoses; temperature change caused air-slack and Strata failure around supports.

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