On a skid steer or all terrain loader maybe...
It all depends on what you want too. We built a smaller 24x17 pond in the front yard. It has a 16 shelf for planting, and then drops to about 4' at the deepest. It has a 4' high waterfall that cascades along a 17' "streambed".
Since it is small relative diameter, and deep, there is no way I could have gotten my Kubota and FEL in there to do much, especially since there was little room to manuever around it.
We used an excavator in conjunction with my Kubota and a Bobcat. Our excavator guy took less than 4 hours to dig the pond. He piled the dirt to one side, where I used the two other tractors to load and move the dirt.
If you are building a larger pond, in an area with room to manuever, you might be able to go in, rip the soil with your ripper/scraper, all the while pulling some dirt out with the scraper. Then go behind and scoop the dirt the scrpaer left, with the loader.
Remember, the FEL is a "loader". It is not a digger. Having used skid steers, all-terrain loader(skid steer hi-brid with tracks like CAT-247, ASV-RC30 or RC50) and compact tractors(I have a Kubota
B8200 with FEL, T&T, scraper ect), I would do it with a all terrain loader first, Skid steer as second choice, and CUT third choice.
The All Terrain and Skid steer will out dig any CUT, and will out manuever them too. Of course, the machines I am mentioning are heavier and more HP than a CUT. It's not entirely fair to compare a 60hp 6000lb all terrain machine to a 20-30hp 2500lb CUT...
If you want it to have shelves, or steep banks, then and excavator or backhoe could do it.