Ligne 225 KV - (Pratclaux - Montgros)

## Présentation

Cette ligne à très haute tension relie Pratclaux au poste de Montgros nouvellement créé. Elle fait partie de la continuité à 225 KV Pratclaux - Bollène.

## Caractéristiques:

### Nombre de pylônes:

74 pylônes : 65 nappes, 6 pylônes à 3 triangles, 2 chat et 1 portique métallique

## Détails:

### Date de suppression:

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## Historique

Construite au milieu des années 1930, La ligne fut d'abord exploitée sous 150 kilovolts et reliait à l'origine l'usine hydroélectrique de Monistrol-d'Allier à Bagnols-sur-Cèze. Un portique à deux niveaux permettait à la ligne d'arriver au poste de Monistrol conjointement avec la ligne 220 KV provenant de Rueyres. Le portique existe toujours mais l'étage supérieur (supportant l'ancienne ligne Monistrol-Rueyres) a été démonté au début des années 1980.

A partir de 1952, le tracé est légèrement modifié et la tension réhaussée à 225 KV après la mise en service du Poste de Pratclaux deux ans auparavant.

La ligne a depuis été fractionnée en plusieurs tronçon suite à la création de divers postes sur son parcours. Le dernier en date est celui de Montgros, mis en service en Septembre 2019 pour renforcer l'alimentation électrique du Nord Lozère.

## Description du tracé

* La ligne débute au poste de Pratclaux et part vers le Sud, franchissant les gorges de l'Allier au dessus de Monistrol.
* Tout le long du tracé, elle suit l'Allier et la ligne des Cévennes en arpentant le versant Ouest de la vallée.
* Après avoir traversé la D59, elle tourne légèrement vers le Sud-Est et garde ce cap jusqu'à Montgros.
* Après avoir croisé la ligne 225KV Pratclaux - Montpezat, elle rejoint la ligne Montgros-Laveyrune sur un support nappe commun où les deux ligne passent en souterrain. Elles tournent alors plein Ouest pour entrer dans le poste de Montgros.

## Ancienne ligne

* Ligne 150 KV - (Bagnols-sur-Cèze - Monistrol-d'Allier)