The canal extended past the
Long Sault rapids from
Cornwall, Ontario, to
Dickinson's Landing. From the head of the Soulanges Canal to the foot of the canal, there is a stretch of the river through
Lake St. Francis of . The length of the canal was . It had six locks that were 270 by 45 feet. The total rise or lockage was 48 feet. The depth of water on the sill was 14 feet. It was 100 feet wide at the bottom and 164 at water surface. It closed in 1968, after becoming obsolete and functionally replaced by the St. Lawrence Seaway and its
Wiley-Dondero Canal on the US side of the river. Most was subsequently filled in, helping to create Lamoureux Park. A section still remains as a long body of water stretching to the foot of the Moses Saunders hydro dam revetment. ==See also==