# STEPPING OR KNEELING ON OBJECT
> MSHA accident `220071550073` · 05/21/2007 · Martin Marietta Materials, Inc.
## Details
- **Degree of injury:** DAYS AWAY FROM WORK ONLY
- **Classification:** STEPPING OR KNEELING ON OBJECT
- **Accident type:** Struck against stationary object
- **Occupation:** Drill helper
- **Activity:** Getting on or off equipment
- **Injury source:** BROKEN ROCK,COAL,ORE,WSTE
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** ANKLE
- **Days lost:** 3
- **Mine experience:** 0.23 years
## Operator
- **Controller:** Martin Marietta Materials Inc
- **Operator:** Martin Marietta Materials, Inc.
- **Mine:** [3401905](https://api.ai-analytics.org/mine/3401905)
## Narrative

While dismounting drill rig, stepped off of ladder onto a rock which rolled causing him to roll (sprain) his ankle.

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