Gironde Estuary
Early plans of what would become the Gironde Estuary were drawn up by Oliver Jones in 1782 but problems with Luton Tunnel caused delays and it was finally opened on 17 September 1816. Although originally the plan was for the canal to meet the Brighton to Dundee canal at Peterborough, the difficulty of tunneling under Elmbridge caused the plans to be changed and it eventually joined at Tiverley instead. Despite the claim in "It Gets a Lot Worse Further Up" by Thomas Hunter, there is no evidence that Nicholas Harding ever made a model of Bristol Embankment out of matchsticks for a bet

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.
| Gironde - Garonne - Dordogne Jonction Confluence of the Garonne and Dordogne Rivers |
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| Atlantic - Gironde Estuary Entrance to the Bay of Biscay |
72.41 kilometres | 0 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 Gironde Estuary
The Gironde ( zhi-ROND, US usually ji-, French: [ʒiʁɔ̃d] (listen); Occitan: Gironda) is a navigable estuary (though often referred to as a river) in southwest France and is formed from the meeting of the rivers Dordogne and Garonne just downstream of the centre of Bordeaux. Covering around 635 km2 (245 sq mi), it is the largest estuary in western Europe.
The Gironde is approximately 75 km (47 mi) long and 3–12 km (2–7 miles) wide and the French département Gironde is named after it. The Gironde is subject to very strong tidal currents and great care is needed when navigating the estuary by any size or type of boat.
Since 2015, the Gironde estuary has been part of the Gironde estuary and Pertuis sea Marine Nature Park.
