Water works were therefore built to convey water to a storage pool northwest of the Temple Mount, draining both Beit Zeita stream and the Tyropoeon. The tunnel is 80 meters long, approximately 1.20 feet (0.37 m) wide, and 12 feet (3.7 m) high at its tallest point. The "Hasmonean tunnel" or "Hasmonean viaduct", as it is known, was unearthed during excavations by the Israeli Ministry of Religious Affairs in 1985 and is currently accessible through the Western Wall Tunnel.