We drove up to the crossing a few months ago with the thought of doing it. It was about top of the wheel height and flowing quite hard. The thing that stopped us was the very soft sandy bottom. We walked out about 10mts and it was hard just walking, you sunk into the sand without trying and soon had the water up to your goolies. I would dearly love to do it but its a long way from home to be a 'drowned' hero.
I guess late in the season would be the time to do it.
P.S, we have done wider, heaps deeper crossings but none with as soft a bottom as the Jardine.