From the FS site
MIDDLE FORK BOATERS:
CAUTION: Boater Hazard Report - at Rock Island, there are two large logs on the center rock that are pinned extending into both sides of the river channel, creating nasty strainers. Update: The log above Velvet Falls is no longer there and all rafts have been recovered.
On Marsh Creek, a raft is still pinned on a strainer and anchored to a tree on the left side of Marsh Creek about 1/2 mile below the pack bridge over Marsh Creek. There have been other reports about river-wide logs in Marsh Creek.