# MACHINERY
> MSHA accident `220051750053` · 06/17/2005 · CalPortland Company
## Details
- **Degree of injury:** NO DYS AWY FRM WRK,NO RSTR ACT
- **Classification:** MACHINERY
- **Accident type:** Struck against a moving object
- **Occupation:** Crane operator, Mobile equipment operator (MEO), Dragline operator, Dropball operator, Rigger
- **Activity:** Surface equipment, NEC
- **Injury source:** CRANES,DERRICKS
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** BACK (MUSCLES/SPINE/S-CORD/TAILBONE)
- **Days lost:** 0
- **Mine experience:** 31.13 years
## Operator
- **Controller:** Taiheiyo Cement Corp
- **Operator:** CalPortland Company
- **Mine:** [0201138](https://api.ai-analytics.org/mine/0201138)
## Narrative

EE was sitting on chair in cab of overhead crane.  Adjustable back of chair gave way suddenly, jerking EE.  Felt pain in upper back.  Diagnosed with upper back strain.  Returned to regular duty; given muscle relaxer medication.

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