I've read about a steel and wood bridge near the Tenaya Lake inlet, near Pywiack Dome.
I read about it in this thread:
http://yosemitenews.info/forum/read.php?3,37948,37990
...posted by a guy named "YosemiteJim", about 3/4 way down the thread page, Aug 6, 2012. He says he's laid eyes on it.
I can not find it on the 7.5 min topo maps, posted online, nor on Google Earth.
So, I'm confused. I thought this would be a good alternative to crossing the Tenaya Lake outlet, if it's waist to chest high deep in water. But, I don't read about such an alternative here on this forum, and mebbe cause I have not looked long / hard enough.
Is the bridge there? Is it a good crossing alternative, alibet a couple more miles further of trail, sure.