I found a good strong piece of blue string while cleaning up the area and figured I'd tie it up in this tree in the general location I plan to build one day. This piece of driftwood was lodged in this tree about 7' up during a flood in 2002. I figure the wood won't last forever so I'd mark it with the string. This height is pretty significant because the river is still way downhill from here. The depth of the water in the center of the river must have been 25'-30' or so in order for the water to get all the way up here.