Hmmm. More than a bit dicey on the first one. Also, I can't tell, but when doing stuff like this (and snow bridges) be sure to unbuckle your waist belt -- one less thing to worry about if you go in. Also, what I don't really like about either of these log crossings is the run out. The ideal is to go into still water if something goes wrong, not a waterfall or cascade or rapids.
Obviously anyone can do whatever they want, but think long and hard about this kind of thing and what Plan II is if you go in.
g.
