Thanks for all the awesome ideas. I think I might end up pushing it across the span with my dozer while keeping weight on the end with my tractor? Maybe that will keep it from tipping into the water.
Sorry I cant find any pictures but when I'm back up there. The span across is 28 to 30ft or so. The creek walls are straight down and are about 8' high while the water in the creek is about 5' deep. So it's too deep for any equipment to cross it. I might could push in some bank wall into the creek for a temporary crossing and then work on the other side but that would mean the start of erosion on the banks. I think it would take a whole lot of dirt too. I'd rather avoid that, plus I would lose all that dirt downstream.
I do have trees on the other side but it's very very thick to get thru over there. Of course if I had the dozer on the other side, I could clear it out real quick. Its only 7 miles by road to the other side but it would cost me a $1,000 semi ride to get the dozer over there.
I'm trying to do this on the cheap obviously. That's why I'm hoping to do it with the equipment I have. I know an excavator or crane would make quick work of it. I may end up having to try that option.