La rigole de la montagne

The last week I blip some pictures of the " Canal du Midi" , the "Lac de Saint Fereo"l and "La rigole de la Plaine"...today I went to "La montagne noire" for a shot of "la rigole de la montagne"
It is the small canal which take the water on the other side for the "Lac de St Fereol" this small canal in the mountain have been dug during the century XVII , during LOUIS XIV King...by the enginer Pierre-Paul RIQUET.
This small canal folow the level line and come from the other side by a 130 m long tunel....