Part of the navigable aqueduct is still intact. It expanded during construction of the Owens Valley aqueduct. The first Roman aqueduct was built in 312 BCE. It was used for transporting construction materials for building of aqueduct over Solani river. It was used for transporting construction materials for an aqueduct over the Solani river. The eleventh and final ancient Roman aqueduct was built in 226 CE. Outside the walls are the remnants of an ancient aqueduct. The vestibular aqueduct is immediately medial to it. Lavish fountains were fed by water purchased from a nearby aqueduct and stored. Broadway passes by the Old Croton Aqueduct and nearby the shopping district of the village. Mark Wilmer Pumping Plant pumps water into the Central Arizona Project Aqueduct. Herod created the sophisticated Wadi el-Byiar Aqueduct, which fed the upper pool. This is caused by the pressure gradient formed from a blockage in the aqueduct. A typical Roman aqueduct had a gradient of about 1&colon;4800. It was called "Solani Aqueduct Railway".