《明史·志·卷六十四》
只有西边一道水渠傍着大山，长三百多里，宽二十多丈，两岸危险高峻，汉、唐旧迹全被淹没。
惟西一渠傍山，长三百馀里，广二十馀丈，两岸危峻，汉、唐旧迹俱堙。
Only one canal on the western side, clung alongside the great mountain, it was more than 300 li long, and more than 20 zhang wide, both banks were precipitously high and steep, the old traces from the Han and Tang had long since been submerged.