Initial construction vers 1670 (≈ 1670)
First lock with elliptical basin.
1er quart XIXe siècle
Reconstruction period
Reconstruction period 1er quart XIXe siècle (≈ 1925)
Lockhouse and major modifications.
1978
Extension work
Extension work 1978 (≈ 1978)
Partial alteration of the original site.
24 avril 1998
Registration for historical monuments
Registration for historical monuments 24 avril 1998 (≈ 1998)
Lock protection and lock house.
Aujourd'hui
Aujourd'hui
Aujourd'hui Aujourd'hui (≈ 2025)
Position de référence.
Heritage classified
The lock and the lock house on the canal (public domain, not cadastre): inscription by order of 24 April 1998
Key figures
Information non disponible - No character cited
The sources don't mention any actors.
Origin and history
The Castanet lock is a double lock of the Canal du Midi, located in the commune of Castanet-Tolosan, in the Haute-Garonne. Built around 1670, it marks the departure from Toulouse to Sète and is distinguished by its elliptical basin, a first on this route. Originally composed of two chambers, only one remains in operation today. It has been listed as a historical monument since 1998, with its early 19th century lock house, whose basement housed a stable.
The site was modified in 1978 during extension work, partially altering its original condition. The lock, located 15.7 km from Toulouse (Ponts-Jumeaux), is adjacent to Vic's lock in the east and Bayard lock in the west. Its altitude is 148 metres, and it is part of a heritage complex including the Castanet waterworks and the Green Way of the Canal du Midi.
The lockhouse, on the right bank, and the remains of an old mill on the other bank testify to the historic activity of the site. The whole, including the lock and its surroundings, has been protected since 1998 by a listing order for historic monuments. The available sources (Wikipedia, Monumentum) underline its importance in the hydraulic and heritage network of the Occitanie region.
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