《明史·志·卷六十二》
不久，巡抚周忱在白塔河的大桥闸修筑堤坝，按照一定的时间开关，漕运船只逐渐分开航行。
既而巡抚周忱筑坝白塔河之大桥闸，以时启闭，漕舟稍分行。
Before long, governor Zhou Chen built an embankment at the Dabiaozai on the Baitahhe, and opened and closed it at fixed times, so that the grain transport barges gradually sailed separately.