《元史·列传·卷五十一》
每十里置一闸，到通州沿河设七闸，各闸相距一里多。闸上设闸门闸板，借以截断流水，便于行船。
每十里置一闸，比至通州，凡为闸七，距闸里许，上重置斗门，互为提阏，以过舟止水。
A lock is set up every ten miles; seven locks are set up along the river to Tongzhou, each lock is more than one mile apart. Gates and planks are installed on the locks to cut off the water flow, which is convenient for navigation.