Abstract: At 2:00 p.m. on October 8, 2021, an employee was performing valve cleaning and inspection operations at a ship building and repair facility. The employee was working at the site through an employment placement organization. The employee and his coworkers were using a chain hoist attached to an A-frame gantry crane to access the valve for cleaning and inspection. The A-frame gantry crane was on an improved ground surface and began sliding when the employee and his coworkers were turning the valve. The crane movement caused the weight of the valve to also slide and swing with the hoist sideways from the crane. The momentum and weight of the swinging valve caused the entire gantry crane to fall forward and land on the employee causing him to fall backwards onto metallic disks. The employee sustained contusions to his head, back and arms and fractures in his leg due to the direct impact to his body from being struck by the gantry crane and heavy valve and from landing on the metallic disks on the ground surface. The employee was hospitalized for treatment.