Many elevators have scales at their loading sites. Mostly the scales are for trucks, but an increasing number of elevators have scales in their loading tracks (especially if they load inside a shelter). An elevator in Colorado once dropped a car though the scale when they had an inexperienced elevator operator overload a covered hopper. The operator filled the car to the top, but the type of grain he was loading was quite heavy and the cars were normally only filled half full. He finished loading the car and closed the lid, just as he stepped off the top of the car it fell through the scale---he had loaded nearly 200 tons into a 100 ton car and sheared the pins off the scale arms. The only way to unload the car was with shovels and buckets. After unloading the car, the car was scrapped as the impact and weight ruined the center sill, and the scale had to be rebuilt-----$400,000 mistake.