Ligne 225 KV - (Montgros - Laveyrune)

## Présentation :

Cette ligne à très haute tension relie les postes électriques de Montgros et Laveyrune. Elle fait partie de la continuité à 225 KV Pratclaux - Bollène.

Chargement de la 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class=\"mw-parser-output\"\u003E\u003Cp\u003EMontgros\n\u003C/p\u003E\u003C/div\u003E","title":"Montgros\n","link":"","lat":44.79112956242303,"lon":3.719477882395359,"icon":""},{"text":"\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003ELaveyrune\n\u003C/p\u003E\u003C/div\u003E","title":"Laveyrune\n","link":"","lat":44.62042615475018,"lon":3.899562487441668,"icon":""}]}
## 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, son tracé est modifié; elle relie dès lors Pratclaux à Bollène et la tension est portée à 225 KV.

La ligne a depuis été fractionnée en plusieurs tronçons suite à la création de divers postes sur son parcours.

Cette section est la plus récente de la continuité ; le poste de Laveyrune a été mis en service en 2016 pour raccorder un parc éolien et celui de Montgros fin 2019 pour renforcer l'alimentation électrique du Nord Lozère.

## Description du tracé :

Sur sa partie aérienne, la ligne suit une direction Sud-Est rectiligne tout le long du tracé.

* Elle débute au poste de Montgros et parcourt environ 900 mètres en souterrain vers l'Est, en parallèle de la ligne Pratclaux - Montgros. Les 2 lignes remontent à la surface depuis un pylône nappe commun.
* Elle longe ensuite le lac de Naussac et croise la N88 à 2km au Sud-Ouest de Langogne, juste après avoir traversé un bois.
* Après la N88, elle passe à Saint-Flour-de-Mercoire puis traversent une grande étendue forestière.
* A la sortie de la forêt, elle croise la D906 et franchit la rivière Allier pour entrer en Ardèche.
* Après l'Allier, elle passe au dessus de la ligne des Cévennes puis entre en piquage dans le poste de Laveyrune 100 mètres plus loin.

## Ancienne ligne :

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