Tree trunk across river

Hi all,
A tree I was cutting down has fallen over a deep nearby river. See screen cap:
images
I'd like to move the trunk, which requires me to turn swimming on, which of course makes it impossible for me to grab said tree trunk.
Any suggestions on how I could get rid of it or move it?
A tree I was cutting down has fallen over a deep nearby river. See screen cap:

images
I'd like to move the trunk, which requires me to turn swimming on, which of course makes it impossible for me to grab said tree trunk.
Any suggestions on how I could get rid of it or move it?