《明史·志·卷六十二》
新开通的沽河，北面对着蓟州，正好与水套、沽河相对，南北相距四十多里而路途径直，并且水深，这中间阻挡隔绝的地方只有四分之一，假若开通沟渠用来运输军粮，可以没有海运的忧患。 
新开沽河，北望蓟州，正与水套、沽河直，袤四十馀里而径，且水深，其间阻隔者仅四之一，若穿渠以运，可无海患。 
The newly opened Guhe river is facing Jizhou in the north, which is just opposite to Shuitao and Guhe river. The distance between the north and the south is more than 40 miles, and the waterway is straight and deep. There is only one-fourth of the blocking and isolation in the middle. If we open canals to transport military rations, we can avoid the worries of sea transportation.