# MACHINERY
> MSHA accident `220231440010` · 05/18/2023 · CalPortland Company
## Details
- **Degree of injury:** DAYS RESTRICTED ACTIVITY ONLY
- **Classification:** MACHINERY
- **Accident type:** Over-exertion NEC
- **Occupation:** Laborer, Blacksmith, Bull gang, Parts runner, Roustabout, Pick-up man, Pitman
- **Activity:** Machine maintenance
- **Injury source:** HAND TOOLS,POWERED,NEC
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** BACK (MUSCLES/SPINE/S-CORD/TAILBONE)
- **Days lost:** 0
- **Mine experience:** 5.06 years
## Operator
- **Controller:** Taiheiyo Cement Corp
- **Operator:** CalPortland Company
- **Mine:** [0400034](https://api.morvs.ai/mine/0400034)
## Narrative

Incident occurred while employee was using rotary hammer from man-basket to remove build up on crane way wall and pipes. Employee was hammering build up on pipes when it became lodged in build up. Employee let off the trigger was a few seconds then engaged trigger to try and pull out hammer. While pulling on hammer employee felt pull/ strain in middle/ center of back.

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