The Tar Sands in Canada. There are several videos of these loaders and larger ones loading hugh trucks at the Tar Sands area. This is a mining area, not an oil well.
The loader buckets hold 54 yards I seem to remember. Can't remember the weight. Two things I remember about the trucks right off the top of my head is that the tires on the trucks are 13 feet tall, and when the bed is extended for dumping it is 50' tall. The fuel tank holds 1,000 gallons, and it burns a gallon a minute on average during the shift.
Just think it takes fuel to mine, lots of fuel. China is also doing this type of mining on a large scale. India is also. Wonder why fuel is going up in price world wide? And Obama refuses to let us drill, saying we can not drill our way out of this problem. Our leaders have been saying this for 30 years. If we had continued drilling 30 years ago we would not be in this mess.