The Malpas tunnel carries the

Canal du Midi The Canal du Midi (; ) is a long canal in Southern France (french: le Midi). Originally named the ''Canal royal en Languedoc'' (Royal Canal in Languedoc) and renamed by French revolutionaries to ''Canal du Midi'' in 1789, the canal is considere ...

under the d'Ensérune hill in

Hérault Hérault (; oc, Erau, ) is a department of the region of Occitania, Southern France. Named after the Hérault River, its prefecture is Montpellier. It had a population of 1,175,623 in 2019.Pierre-Paul Riquet Stele in Toulouse Cathedral Pierre-Paul Riquet, Baron de Bonrepos (29 June 1609 (some sources say 1604) – 4 October 1680) was the engineer and canal-builder responsible for the construction of the Canal du Midi. Background Paul Riquet was b ...

, the chief engineer. It is located in the

commune A commune is an alternative term for an intentional community. Commune or comună or comune or other derivations may also refer to: Administrative-territorial entities * Commune (administrative division), a municipality or township ** Communes of ...

of Nissan-lez-Ensérune near to the archaeological site

Oppidum d'Ensérune The Oppidum d'Ensérune is an ancient hill-town (or ''oppidum'') near the village of Nissan-lez-Ensérune, France, located between Béziers and Narbonne close to the D609 (formerly RN9) and Canal du Midi. It has been listed since 1935 as a ''mon ...

. There was great disappointment when the works reached the hill d'Ensérune. A few metres of digging in hard rock revealed a very brittle sandstone subject to slippage. Colbert, the prime minister, halted the works when he was made aware of the situation. The portal was blocked and the workings re-sited. Riquet's detractors took advantage of this situation to impede the project. Colbert announced that he would send royal commissioners to decide the canal's future. The advice of the Chevalier de Clerville, architect to

Louis XIV , house = Bourbon , father = Louis XIII , mother = Anne of Austria , birth_date = , birth_place = Château de Saint-Germain-en-Laye, Saint-Germain-en-Laye, France , death_date = , death_place = Palace of Vers ...

, was to cross the river

Aude Aude (; ) is a Departments of France, department in Southern France, located in the Occitania (administrative region), Occitanie Regions of France, region and named after the river Aude (river), Aude. The departmental council also calls it "Ca ...

rather than tunnel through the hill. Riquet, however, maintained his preference for a tunnel because of the extra problems that crossing the Aude would create. Riquet's response was to ask his master mason, Pascal de Nissan, to continue tunneling in secret despite the risk of collapse. In less than eight days the tunnel was complete with a concrete ceiling throughout. The tunnel is 165m long with an arch 8m above the canal's surface, and removed the necessity for an extra

lock Lock(s) may refer to: Common meanings *Lock and key, a mechanical device used to secure items of importance *Lock (water navigation), a device for boats to transit between different levels of water, as in a canal Arts and entertainment * ''Lock ...

. By the time the Malpas Tunnel was excavated in the seventeenth century, the hill had already for several centuries been the site of a tunnel, dug in the Middle Ages, to drain the Étang de Montady. This pre-existing tunnel is said to have been Riquet's inspiration for the Malpas Tunnel. In the nineteenth century, a third tunnel was excavated, passing through the Hill d'Ensérune beneath the Malpas tunnel to house the

Béziers Béziers (; oc, Besièrs) is a Subprefectures in France, subprefecture of the Hérault Departments of France, department in the Occitania (administrative region), Occitanie Regions of France, region of Southern France. Every August Béziers hos ...

Narbonne Narbonne (, also , ; oc, Narbona ; la, Narbo ; Late Latin:) is a commune in France, commune in Southern France in the Occitania (administrative region), Occitanie Regions of France, region. It lies from Paris in the Aude Departments of Franc ...

railway line.

References

External links

Le tunnel de Malpas in French

Tunnel du Malpas in French

Le Tunnel de Malpas in French
{{Coord, 43, 18, 26, N, 3, 7, 36, E, type:landmark_region:FR, display=title Canal tunnels in France Canal du Midi Tunnels completed in 1679 1679 establishments in France

References

Further reading

See also

External links