Channels were dug between the lakes along the upper part of the route, which caused the water level in some of the lakes to drop by as much as 15 feet [5 m].
Tika izrakti kanāli starp ezeriem plānotā ūdensceļa dienvidos, kas izraisīja ūdens līmeņa pazemināšanos dažos ezeros līdz pat 5 metriem.