Euphrates Turkey, in Syria and in Iraq. The same figures are given by Isaev and Mikhailova. The length of the Shatt al-Arab, which connects the Euphrates and the Tigris with the Persian Gulf, is given by various sources as . Both the Kara Su and the Murat Su rise northwest from Lake Van at elevations of and amsl, respectively. At the location of the Keban Dam, the two rivers, now combined into the Euphrates, have dropped to an elevation of amsl. From Keban to the Syrian–Turkish border, the river drops another over a distance of less than . Once the Euphrates
Euphrates Tunnel Euphrates Tunnel The Euphrates Tunnel was allegedly a tunnel which was built under the Euphrates river to connect the two halves of the city of Babylon, in the old Mesopotamia. Archaeologists believe it was built between 2180 and 2160 BCE. No other sub-aqueous pedestrian tunnel was attempted until Marc Brunel built the Thames Tunnel beginning in 1824 CE. Construction allegedly began with a temporary dam across the Euphrates river, and proceeded using a "cut and cover" technique. The tunnel allegedly spanned 12 feet high and 15 feet wide, it is presumed that it was used by pedestrians and horse driven