Used a Kubota SVL-75. I couldn’t get it that high just dumping from the front. So I dug out from the front, then came around the back and built a grade to drive up and add more height. I could’ve built more grade behind, but it would’ve increased my hours into it considerably.
My only concern with digging out the front is that mind is already in a flood plane, don’t want to lose all my dirt and make an unintentional pond.