I found still another word for this, as used in Iran: quanat

Summary: The 3,000-year-old Zarch quanat, situated in Iran's southern Province of Yazd, the water volume of which is
reduced to 150 liters per second during last 100 years, is on the verge of drying up. The above aqueduct, 85 meters deep and
80 kilometers long, is the longest quanat in Yazd which still has potable water at its origin. Sweet (desalinated) water of Zarch
aqueduct, in addition to supplying potable water for inhabitants of the region, irrigates 300 hectares of the farmland too. This
aqueduct is the second-longest and the most ancient aqueduct in the world.

NB - In this instance it is not clear that a tunnel is involved. I doubt very much existence of a tunnel 80 km long!