Ligne 225 KV - (Pied-de-Borne - Lafigère - Barjac) - Piquage

### Nombre de pylônes:

96 supports ;68 pylônes à 3 triangles + 17 chats + 10 nappes + 1 pylône à 6 triangles

## Présentation :

Cette ligne à très haute tension relie le poste de Barjac à l'usine hydro-électrique de Pied-de-Borne. Elle fait partie de la continuité à 225 Kilovolts Pratclaux - Bollène.

Chargement de la 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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.

En 1952, avec le développement du réseau à très haute tension, la tension est portée à 225 KV et son tracé est modifié; elle relie dès lors Pratclaux à Bollène.

L'aménagement  hydraulique du Chassezac et ses affluents entraîne la création en 1965 d'une usine à Pied de Borne. La ligne Pratclaux-Bollène est alors dérivée sur environ 16 km entre Montselgues et Seyras , 13 pylônes de type "chats" et 2 nappes sont créés pour raccorder le poste de la centrale.

L'usine de Lafigère est mise en service en 1967 et une courte liaison de 800m est créée en piquage sur la ligne.

Entre 1992 et 1994 est mis en service le poste de Barjac, raccordé sur la ligne via un pylône à 6 triangle.

## Description du tracé :

* La ligne démarre au poste de Pied-de-Borne, franchit la Borne puis tourne vers le Sud-Est.
* Elle suit le Chassezac jusqu'à Lafigère en arpentant le versant Est de la vallée.
* Elle bifurque ensuite plein Est jusqu'à la D10, où elle retrouve le tracé d'origine de la ligne Pratclaux-Bollène. C'est à partir d'ici qu'elle se compose de pylônes à 3 triangles.
* La ligne se dirige vers le Sud sur 1km puis vers l'Est jusqu'aux Assions.
* Avant de croiser la D104A, elle tourne vers le Sud-Est et franchit le Chassezac au niveau du méandre de Casteljau. Elle gardera cette direction rectiligne jusqu'à son terme.
* Elle quitte alors les reliefs et traverse un paysage de plaines, longeant notamment la D102 sur plusieurs km autour de Bessas.
* Elle entre enfin dans le poste électrique de Barjac, situé au Nord-Ouest du village.

## Ancienne ligne :

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