Besides seeing micro. I often find a Mylar balloons. Also I must confess that I lost an empty water bottle out of my pack last summer, I really do think of it often. I feel something karma related is going to happen to me.
I came here to find out more about this. I didn't find anything anything so I'm throwing it up.
http://nhpr.org/post/replacing-pemi-wilderness-bridge-decision-delayed-until-next-year-allow-study-and-more-comments
Cheers,
Marshall