Large Earth Movers

My father works in open pit mining in South Texas. I guess that is where I got my love of large earth movers.
Most of the equipment he works around are Caterpillar Dozers, Scrapers, Track excavator , Motor Graders and Huge dump trucks.

The D-10 Dozer was one of the largest dozers he operated. It has about 700 horsepower.

Here is some equipment that is used in the large coal mines in Wyoming.

And one picture just for fun.