Souhegan

As of January 2023, there is a giant tree/rootball embedded in the normal boat drop on far river right (the only smart way to boof these falls).  Scout this area easily during your car shuttle to see if the passage remains blocked by walking out onto the manual spill control adjustment pad.  Much of the tree is underwater and will be difficult to see from boat scouting or from the left side of the river. Portage is normally easy on far river left.  Maybe a large flow will dislodge the tree.

Some people ran from the top to Wilton recently at a 3900 CFS level. which was high but not quite in the trees yet. It was pushy and there were some big waves but I would not rate it above a 3 or 3+ until you get to the falls. Big stuff there; try to eddy out above and observe before running. Trash dump was partially washed out, so less tricky than at lower levels, but moving very fast.

The real issue was overhanging branches, of which there were many. With fast moving water you have to be watching carefully all the time to avoid getting stuck. The river is largely free of blockage thanks to public spirited boaters who cleared it out recently, but there can always be a new strainer and with this high speed current it would not be fun to hit one, so extra care is required.