Blockage of wood being floated down a river (6)

I believe the answer is:
logjam
(Other definitions for logjam that I've seen before include "blockage" , "Major stoppage" , "deadlock" , "bottleneck" , "impasse" .)
I believe the answer is:
logjam
(Other definitions for logjam that I've seen before include "blockage" , "Major stoppage" , "deadlock" , "bottleneck" , "impasse" .)