https://www.openstreetmap.org/way/798415134 

Add alt_name : Ruisseau de Clairefontaine

The stream came from Waltzing ; passing under Chemin de Dèle by a culvert somewhere between https://www.openstreetmap.org/node/3808099373 and https://www.openstreetmap.org/node/6130492975 (for locals : there's a small wall to the left comming from Arlon, and the stream is visible. And one of his source is a little west from this point : https://www.openstreetmap.org/node/4693877507