Michigan Aggregates Association

MSHA Close Call Accident Alert: Derrick Failure

On Monday, October 23, 2017, the boom of a Pellegrini stiff leg derrick failed while lifting a muck bucket. The crane operator and the foreman were in the operator's station, or "crow's nest," on the edge of the high-wall. As the boom started to fail, they were able to run to safety before the operator's station was crushed. The derrick collapsed into the quarry, but no injuries occurred.

Click here to view the full MSHA Close Call Accident Alert.