For the east part i have already make some survey and it's mainly taking time to cut it correctly , not a big deal (we have wms to fix this).

For the west part definitivly yes (but i m afraid that the part back to the "Château de Pape" is not accessible). 

The culvert on Engeland seam to me impossible due to the relief, so if a survey should be made it's mostly around https://www.openstreetmap.org/way/438298595 where the stream comming from east is supposed comming (house 118).

#OsmBE #SurveyNeeded