Arrrr, are you ready to plunder the great canal in search of our cache, lol. The Cornwall Canal goes from Cornwall to Dickenson's Landing. And was constructed to by-pass the infamous Long Sault rapids which then allowed for the transportation of goods. The canal is eleven miles long and has six locks with a total rise of 48 feet. The depth of water on the sill is 14 feet. It is 100 feet wide at the bottom and 164 at water surface.