# ENTRAPMENT
> MSHA accident `220210960013` · 03/29/2021 · Capitol Aggregates, Inc.
## Details
- **Degree of injury:** ACCIDENT ONLY
- **Classification:** ENTRAPMENT
- **Accident type:** Accident type, without injuries
- **Occupation:** —
- **Activity:** —
- **Injury source:** —
- **Nature of injury:** —
- **Body part:** —
- **Days lost:** —
- **Mine experience:** — years
## Operator
- **Controller:** Zachry Corporation
- **Operator:** Capitol Aggregates, Inc.
- **Mine:** [4100010](https://api.ai-analytics.org/mine/4100010)
## Narrative

Employee was riding elevator down to ground level, when the coupling set screw backed out due to vibration causing the motor to spin but the coupling was not engaged. Elevator technician tightened screw. Elevator was lowered, and tested with no further issues. No injuries or illness is reported 

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