My skid steer is 50 hp with about a half yard bucket. Five foot wide.
It is a smooth bucket without teeth( I will get a 4in1 with teeth when I get the funds). I only had to use the backhoe ( a bradco 609 that can dig almost 10 feet deep) for about 6 to 8 hours, in some really hard clay and rock areas.
I had no experience with it before starting the pond and was using it as some set time to learn.
I am learning different ways to be more productive as I go.
One of the best things for digging was to use the weight of the machine going down a good slope into the pond to dig much faster.
It was allot of trips around the pond and over the dam to move the dirt, but as I said before it is incredible compared to my shovel.
I hope to get some more practice as spring gets here.