SLIP OR FALL OF PERSON at Northshore Mining Company
Employee was on the bottom step, on the back of the water truck, stepping down approximately 1.5 feet. As the employee's right foot contacted the ground, the employee felt his right knee give out. The employee was diagnosed with a sprained right knee. The employee's foot did not slip or hit the ground hard before he felt pain in his right knee.
U.S. Mine Safety and Health Administration