This is what’s known as a “rotary car dumper,” and it’s a system that’s been around for over a century, largely with the aim of replacing an even older system.
Unloading of coal at a power plant is much more streamlined with a rotary dumper, also known as a wagon tippler, than with other types of dumpers.
The railcar is held in place inside the dumper with clamps, and the entire mechanism rotates so that the car is nearly upside down.
