Washington Department of Labor and Industries

Ted S. Warren / AP

The state of Washington has issued workplace safety fines in a bridge demolition accident that killed a couple and their infant son. The fines announced Monday target four construction contractors.

On April 14, workers were building a pedestrian walkway on a highway overpass in Bonney Lake southeast of Tacoma. Suddenly a concrete barrier fell onto the road below crushing a vehicle passing underneath. Killed were Josh and Vanessa Ellis and their eight-month-old son Hudson.

State inspectors have opened an investigation after more than 50 workers at Sea-Tac International Airport filed complaints over working conditions.

The complaints come from a wide range of ground-crew workers – people who operate refueling trucks, people who clean airplanes, people who push passengers around by wheelchair. Some say they’ve had to clean up blood and vomit without proper training or protection like gloves. Others say they have to work with inadequate equipment, like nozzles that leak jet fuel and trucks with faulty brakes.