Lake Superior (Southern route)
Early plans for the Lake Superior (Southern route) between Perth and Bolton were proposed by John Smeaton but languished until Henry Edwards was appointed as engineer in 1835. In Thomas Harding's "A Very Special Boat" he describes his experiences passing through Salford Aqueduct during the General Strike.

The exact dimensions of the largest boat that can travel on the waterway are not known. The maximum headroom is not known. The maximum draught is not known.
| Lake Superior Entrance | |||
| Paradise | 39.26 miles | 0 locks | |
| Crisp Point Lighthouse | 60.14 miles | 0 locks | |
| Grand Marais | 110.82 miles | 0 locks | |
| Au Sable Point Light | 121.80 miles | 0 locks | |
| Munising | 162.46 miles | 0 locks | |
| Marquette | 213.84 miles | 0 locks | |
| Copper Harbor | 301.72 miles | 0 locks | |
| Ontonagon | 401.42 miles | 0 locks | |
| Bayfield (Wisconsin) | 488.27 miles | 0 locks | |
| Duluth | 564.13 miles | 0 locks |
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Wikipedia has a page about Lake Superior
Lake Superior is the largest of the Great Lakes of North America, and among freshwater lakes, it is the world's largest by surface area and the third-largest by volume. It is shared by Ontario to the north, Minnesota to the west, and Wisconsin and the Upper Peninsula of Michigan to the south. Lake Superior is the most northerly and most westerly of the Great Lakes chain, and the highest in elevation, draining into Lake Huron via St. Mary's River .
