Papenkasteel (stream) : since +- 2018 a part has been put back in the open air at the east of this point (followng chaussée de Saint-Job) ; some parte are still on culvert when crossing buildings. Also the part near Viaduc de Calevoet - Kalevoetviaduct is not on the nord of it but on south and probably a branch come from Kauwberg  (and/or) Fond Roy.
+ check on Papenkasteel all should be on air so probably a link to the pond.
More survey and research needed.