Project owner allow me to take some pictures : theres 2 pounds : https://www.mapillary.com/app/?pKey=345852691425630

There's a little flow going west and she talk me about a "tank" on the municipality before going to Bervoets (so the Atlas is correct for the stream part). 

For the spring she doesn't know, theres a maconery with a tube near here https://www.mapillary.com/app/?pKey=856689349331588 (visible on Digitaal Hoogtemodel Vlaanderen II, Skyview factor 0,25 m) but it s covered by a plank and unable to determine of there's a spring there or not. It's 23 m from the v1.  

So we can restore the v1 without ground verifiability and add a note/fixme  or simply not add the spring and just draw the water. Advises ? 