I have an update. The Native Fish Coalition state board members walked Parker Brook last fall ('23). As falcon said, it flows under the ground in places and become de-watered in the main channel at times. I would say that the forest canopy seemed more than adequate to shade the river and that none of what we saw in our tour was man made, hence we would not recommend anyone do anything on this stream. Other tributaries to the Flatbrook in that area have native brook trout and in decent numbers, and our focus will be on those areas instead of Parker Brook.