# MACHINERY
> MSHA accident `220030070042` · 12/30/2002 · Martin Marietta Aggregates Of Southern Iowa Inc
## Details
- **Degree of injury:** ALL OTHER CASES (INCL 1ST AID)
- **Classification:** MACHINERY
- **Accident type:** Caught in, under or between a moving and a stationary object
- **Occupation:** Bulldozer operator, Universal operator, Heavy equipment operator, Operating engineer
- **Activity:** Handling supplies or material
- **Injury source:** STEEL RAIL (ALL KINDS)
- **Nature of injury:** CONTUSN,BRUISE,INTAC SKIN
- **Body part:** HAND (NOT WRIST OR FINGERS)
- **Days lost:** —
- **Mine experience:** 0.59 years
## Operator
- **Controller:** Martin Marietta Materials Inc
- **Operator:** Martin Marietta Aggregates Of Southern Iowa Inc
- **Mine:** [1301225](https://api.ai-analytics.org/mine/1301225)
## Narrative

EE WERE LIFTING A BAR TO BE INSTALLED INTO THE PRIMARY CRUSHER UNDERGROUND USING A CHAIN & SCALER. THE SCALER OPERATOR WAS INSTRUCTED TO BOOM DOWN TO CREAT MORE SLACK TO ALLOW THE CHAIN TO BE TIGHTENED AROUND THE BAR. THE SCALER HAS A FLOATATION VALVE THAT RELEASED BELOW A CERTAIN ELEVATION ALLOWS THE BOOM TO GO TO THE FLOOR. WHEN THE BOOM DESCENDED IT CAUGHT THE EE'S HAND.

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