# SLIP OR FALL OF PERSON
> MSHA accident `220071840006` · 06/29/2007 · Martin Marietta Northern California Aggregates,LLC
## Details
- **Degree of injury:** DAYS RESTRICTED ACTIVITY ONLY
- **Classification:** SLIP OR FALL OF PERSON
- **Accident type:** Fall to lower level, NEC
- **Occupation:** Maintenance man, Mechanic,  Repair/Serviceman, Boilermaker, Fueler, Tire tech, Field service tech
- **Activity:** Machine maintenance
- **Injury source:** GROUND
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** KNEE/PATELLA
- **Days lost:** 0
- **Mine experience:** 2.23 years
## Operator
- **Controller:** Hanson PLC
- **Operator:** Martin Marietta Northern California Aggregates,LLC
- **Mine:** [0401959](https://api.ai-analytics.org/mine/0401959)
## Narrative

When the employee dropped into a crawl hole he landed wrong on his left knee.

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