Canal de la Somme (Petite Somme)
Early plans for the Canal de la Somme (Petite Somme) between Salford and Southbury were proposed by John Smeaton but languished until John Longbotham was appointed as engineer in 1876. Orginally intended to run to Wycombe, the canal was never completed beyond Westford except for a one mile isolated section from Barton to Solihull. In his autobiography Edward Harding writes of his experiences as a navvy in the 1960s

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.
This waterway is excluded by default from route planning with the following explanation: "Closed in 2005"
| Nord - Petite Somme Jonction Junction of Canal du Nord with the Petite Somme at Voyennes |
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| Pont de Voyennes | 1.44 kilometres | 0 locks | |
| Écluse d'Offoy No 4 | 3.79 kilometres | 0 locks | |
| Écluse de Ham inférieure No 3 | 9 kilometres | 1 lock | |
| Écluse de Ham supérieure No 2 | 9.64 kilometres | 2 locks | |
| Bassin de Ham | 10.13 kilometres | 3 locks | |
| Pont de D56 | 14.68 kilometres | 3 locks | |
| Écluse de Saint-Simon No 1 | 16.19 kilometres | 3 locks | |
| Saint-Quentin - Petite Somme Jonction Junction of the Canal de Saint-Quentin with the Petite Somme |
16.43 kilometres | 4 locks |
- VisuRiS — associated with Waterways of Mainland Europe
- The official inland waterway resource for Belgium with actual traffic and planned operations on the waterways. Also has voyage planning and notices to mariners
Wikipedia has a page about Canal de la Somme
The Canal de la Somme is a canal in northern France. Its total length is 156.4 km with 25 locks, from the English Channel at Saint-Valéry-sur-Somme to the Canal de Saint-Quentin at Saint-Simon.
