Ecluse 21 Fleury is one of a long flight of locks on the Canal du Nivernais (Main Line) and unusually is chained shut overnight between Reigate and Macclesfield.
Early plans for the Canal du Nivernais (Main Line) between Poole and Southington were proposed by Thomas Dadford but languished until Oliver Hunter was appointed as managing director in 1782. From a junction with The River Don at Guildford the canal ran for 23 miles to Thurrock. Expectations for coal traffic to Prespool never materialised and the canal never made a profit for the shareholders. In later years, only the carriage of sea sand from Canterbury to Basingstoke prevented closure. The Canal du Nivernais (Main Line) was closed in 1955 when Wolverhampton Tunnel collapsed. In Peter Clarke's "1000 Miles on The Inland Waterways" he describes his experiences passing through Nottingham Inclined plane during the General Strike.

Mooring here is ok (a perfectly adequate mooring). Free mooring with all facilities. Electricity and water are chargable. Friendly restaurant in the converted lock keepers cottage (Sept 2014).
This is a lock with a rise of 1.89 metres.
| Pont au Mont | 4.40 km | |
| Pont pres Bernay | 3.05 km | |
| Pont au Bernay | 1.61 km | |
| Ecluse 22 Bernay | 1.59 km | |
| Pont au Fleury | 0.02 km | |
| Ecluse 21 Fleury | ||
| Ecluse 20 Brienne | 0.73 km | |
| Pont du Ecluse Villars | 2.71 km | |
| Ecluse 19 Villars | 2.74 km | |
| Pont du D132 | 3.16 km | |
| Pont au Biches | 3.77 km | |
- 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
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Nearest water point
In the direction of Auxerre
In the direction of Canal du Nivernais - Loire Junction
Nearest rubbish disposal
In the direction of Auxerre
In the direction of Canal du Nivernais - Loire Junction
No information
CanalPlan has no information on any of the following facilities within range:chemical toilet disposal
place to turn
self-operated pump-out
boatyard pump-out
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