The Canal de la Machine, perpendicular to the other two and nearly 300 meters long, brought water to the Pavilon du Manse, which fed it to the garden ponds and waterfalls in the western gardens, since disappeared, sending it to a reservoir once located on the lawn. Part of this reservoir still exists near the racecourse, but it no longer contains water. Some of this hydrologic work was used to feed factories in the valley. The gardens that remain were watered by a completely different system based on an aqueduct coming from the area around Senlis.