Jean,

No bridge, to the best of my knowledge. However, I crossed slightly to the south west, at NH545380, way back in 1994. Memory is poor for that far back but it would have registered if there'd been any great problem. What I do recall is the subsequent struggle up through close grown trees to reach the road. Utter horror. If you do use this crossing, avoid the foliage and stick to the open ground.

Colin

Could that be a bridge at 545381 ?

No bridge showing at 1:25k (NH550390) but a waterfall at NH551390.
NH545381 is a fenceline crossing the river.

Theo