Why a dozer? It's only a third of an acre max, the reach of a 20 ton dozer is 23-25 feet, it can cast, spread, compact, load and shape, and only 1 transport fee. The key is a good operator, a dozer would only be used for trim work...and that's what excavators with tilt/shape bucket do much better than a dozer.
Why not a dozer?
A 1/3 acre pond is roughly 125'x125' if its square, even bigger if its round or irregular shape, plus the back toe of the dam could be another 40 50 ft beyond that,, a 25' reach excavator is not able to throw dirt that far, and will have nothing but fluffy spoil pile where ever he does drop it.
I have been around dirt and pond building for most of my life, never ever heard of building a pond with an excavator. js
