A friend posed a question today at monthly breakfast about building some kind of creek crossing on his place. It is at the main entrance to his farm. Which means it will need to support vehicles and a large tractor. The distance across is over 60 feet. The water is slow in August but now it’s deep and swift after 1 in plus rain. The bottom it’s in is mostly gravel. He’s dug down 4 feet on the banks not finding any solid base.when creek is running big the bottom of it gets sponge. Of course looking for least cost. What are some things you have done that works?