The same general concept (stepped tunnel through bedrock to already-known spring source) is exhibited in modified form in “Warren’s Shaft” at Jerusalem. An even closer analogy may be the tunnel at Khirbet Bel ‘ameh (ancient Ibleam) near Jenin, but it has not been fully exposed or dated (see G. Schumacher in Palestine Exploration Quarterly, 1910, 107–112, Pl. 2).