text: I agree with Tchiller on it being demotivating to put the whole valley full of notes. It does only lead to frustration and not to bridges, culverts and fords being inserted into OSM.
  I am planning on hiking Ilanz - Panixerpass - Elm  - Glarus soon, and have already marked some of these crossings along the planned route with fixme tags so I have a reference in OSMand when I walk by and can check what is going on locally.