Heads up if you're planning to paddle on the West Coast. There are now two serious bits of wood in the lower Kakapotahi gorge. The first is below the second drop, and roughly in line with the bottom of the first eddy, top of the second eddy on left, after 2nd drop. At medium to high flows it may not be able to be seen.
The second tree is almost out of sight, when scouting from the vantage point high on the bluff on river right. Both trees are right across the river with no safe passage and may be present for quite some time. Portage is your best option, thanks to Gareth Fryer for the info.