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Draft:Nantes Transporter Bridge


Nantes Transporter Bridge

Pont transbordeur de Nantes
The transporter bridge in Nantes prior to 1914
Coordinates47°12′30″N 1°33′58″W / 47.208333°N 1.566111°W / 47.208333; -1.566111
CrossedLoire (Madeleine branch)
LocaleNantes, France
Official namePont transbordeur de Nantes
Characteristics
DesignTransporter bridge
MaterialSteel
Total length141 metres (463 ft) (between pylons)
Height75 metres (246 ft) (pylons)
50 metres (160 ft) (deck)
History
DesignerFerdinand Arnodin
Constructed byUsines Arnodin
OpenedNovember 1, 1903 (1903-11-01)
Closed1 January 1955
DemolishedMay 1958
Location
Map
Interactive map of Nantes Transporter Bridge

The Nantes Transporter Bridge (Pont transbordeur de Nantes) was a transporter bridge that crossed the Loire in Nantes, France. Designed by engineer Ferdinand Arnodin, it entered service in 1903 and was dismantled in 1958.

Spanning the bras de la Madeleine near the site of the modern Anne de Bretagne Bridge, the structure linked the Quai de la Fosse [fr] on the right bank to the Île de la Prairie-au-Duc. The area was an industrial hub at the turn of the 20th century, hosting major shipbuilding yards including the Ateliers et Chantiers de Bretagne, established by Eugène Guillet de La Brosse.

History

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Background and planning

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Industrial expansion along the Loire in the late 19th century created an urgent need for workers and freight to cross the river efficiently.[1] Traditional crossing methods proved inadequate. A swing bridge was ruled out owing to erratic river currents, while an underwater tunnel was deemed impractical due to sandy, unstable soil. Building a conventional fixed bridge would have required long, steep access ramps and the demolition of adjacent buildings in order to maintain sufficient air draft for tall-masted sailing vessels.[2]

The concept of a transporter bridge offered a resolution to these engineering constraints. The system had been developed by Arnodin and Alberto de Palacio for the Vizcaya Bridge near Bilbao, Spain, constructed between 1888 and 1893. Arnodin was subsequently selected to design the Nantes crossing. Official approval came via a decree of public utility issued on 26 May 1898, granting Arnodin an 80-year operating concession.[2][3]

Construction and opening

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On-site work began on 16 February 1902. Steel components for the 75-metre (246 ft) pylons and the main deck were fabricated at the Arnodin works in Châteauneuf-sur-Loire.[4] The right-bank pylon was erected by November 1902, and the left-bank structure was finished in February 1903.

Workers assembled the outer spans with stay-cables before lifting the 46-tonne central truss 50 metres (160 ft) above the riverbed on 3 August 1903.[4] Load testing was conducted using 85 tonnes of paving stones stacked on the gondola.[4] The bridge opened to traffic at 07:00 on 1 November 1903.[5] On its first day, the bridge carried approximately 10,000 pedestrians, who paid 5 or 6 centimes depending on class, alongside 2,000 higher-fare passengers.[4]

Closure and removal

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Passenger traffic declined markedly after World War II, compounded by the urban infilling of several northern channels of the Loire, which altered local transit patterns. Operating revenues fell into deficit, and an effort in the early 1950s to register the structure as a historical monument failed.

Crossing operations ended on 1 January 1955 after 52 years in service. The municipal council, led by Mayor Henry Orrion, voted for its demolition despite local objections. Dismantling began on 21 May 1958 when the central deck span was lowered; the remaining steelwork was salvaged and shipped to steelworks in Le Creusot by October 1958.[6]

Design and engineering

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The bridge employed a cable-stayed cantilever configuration with descending counterweights anchored by vertical steel cables running along the pylon legs. This variation on Arnodin's original design eliminated the need for long land-based anchor cables, saving considerable space on dense urban quaysides.[1]

A motorized suspended gondola (nacelle) transferred passengers and vehicles across the 142-metre (466 ft) gap in roughly two minutes. The platform contained a wooden deck bordered by pedestrian walkways, first-class covered seating, second-class standing space, and an elevated glass cab for the operator (referred to locally as the "wattman").

Legacy and physical remains

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Cultural references

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The structure figured in the writings of Julien Gracq, Armel de Wismes, and René Guy Cadou, as well as paintings by maritime artist René Goulet. On 31 May 1925, Polish stunt performer Willy Wolf died after diving from the top of the bridge deck, an event commemorated on the municipal mural Le Mur tombé du ciel.

In 1982, filmmaker Jacques Demy and production designer Bernard Evein recreated the bridge using a glass shot visual effect for the opening sequence of Une chambre en ville.[7]

Extant remains

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Portions of the masonry foundations and steel anchoring rods remain intact on both banks of the Loire, situated adjacent to and beneath the modern Anne de Bretagne Bridge. A commemorative plaque marks the site on the northern quay.

In 2008, architect Paul Poirier proposed constructing a modern replacement transporter bridge named "Jules Verne", a project championed by the heritage group Association des Transbordés.[8][9] However, subsequent municipal decisions to widen the existing Anne de Bretagne Bridge ended active consideration of the proposal.

See also

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References

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  1. 1 2 Sigot, Jacques. "L'histoire du premier pont à transbordeur de Nantes". Les Transbordés (in French). Retrieved 17 April 2010.
  2. 1 2 "La naissance du pont-transbordeur" (in French). Conseil général de la Loire-Atlantique. Retrieved 17 April 2010.
  3. ↑ "Ferdinand Arnodin et les ponts à transbordeur". Timbres Ponts (in French). Retrieved 17 April 2010.
  4. 1 2 3 4 Wester, Pascale (September 2003). "Le Transbordeur aurait 100 ans". Nantes au quotidien (in French) (137): 29–31. Retrieved 18 April 2010.
  5. ↑ "En quête d'histoires. Sarradin réalisa l'annexion de Doulon et Chantenay à Nantes". Ouest-France (in French). 19 February 2020. Retrieved 1 January 2024.
  6. ↑ Sigot, Jacques (1998). Nantes : René Perdriau - 30 ans de photographie (in French). Montreuil-Bellay: Éditions CMD. pp. 15–19. ISBN 978-2-909826-74-5.
  7. ↑ Berthomé, Jean-Pierre (1996). Jacques Demy et les racines du rêve (in French). Nantes: L'Atalante. p. 330. ISBN 978-2-84172-042-2.
  8. ↑ Gambert, Philippe (23 January 2010). "Nantes : Pont mobile, transbordeur ou un téléphérique". Ouest-France (in French). Retrieved 17 April 2010.
  9. ↑ "Association Les Transbordés". lestransbordes.org (in French). Retrieved 25 March 2019.

Further reading

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  • Bouyer, Jean-Paul (1989). Vie et mort d'un transbordeur (in French). Pierre Gauthier.
  • Sigot, Jacques (1996). Nantes : le transbordeur (in French). Éditions CMD. ISBN 978-2909826400.
  • Sigot, Jacques (2005). La France des transbordeurs (in French). Alan Sutton. ISBN 978-2849102626.
  • Salaün, Gildas; Guihard, Jean-Luc (January 2005). "Des Roquios au Transbordeur, les jetons des passages de Loire à Nantes". Armor-Numis (in French) (121).
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