The third Class V or V+ rapid on this section of USB, Bridge Falls or Martin Gulch Falls.
This drop used to be boofed river right, tight up against the wall, landing in a poool, then rambled down a fast shallow channel river right into the bottom hole. Wood is always a hazard here.
The run is now up to you; left or right.
The right side is less of a boof and more of a hazard with rocks in the landing now.
The left side can be undercut and tricky, but is manageable. Very junky.
Note: this rapid changed significantly in 2001: The pool has reduced in size and the entrance boulders have all moved. Take a look at this one.
The hole at the bottom of this rapid will work you like a ragdoll in a planer, so for God's sake, boof with intention.
Portage is river right from beach head, with a nice stone foot trail for 80 yards, then put-in above bridge and prepare for fun class IV cascade.