Ligne 225 KV - (Bollène - Saint-Victor)

### Nombre de pylônes:

438 pylônes à 3 triangles + 23 nappes à 2 circuits + 2 nappes + 2 chats + 1 drapeau

## Détails:

### Date de création:

1932 de Saint-Victor à Vénéjan1952 de Vénéjan à Bollène

### Date de suppression:

1999 : déposée de Sabran à Saint-Just-et-Vacquières

## Présentation :

La ligne Bollène - Saint Victor est une ancienne artère à 225 KV qui reliait les usines hydrauliques du Tarn au barrage André Blondel sur le Rhône. Elle est aujourd'hui fractionné en 3 lignes distinctes.

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class=\"mw-parser-output\"\u003E\u003Cp\u003ESaint-Victor\n\u003C/p\u003E\u003C/div\u003E","title":"Saint-Victor\n","link":"","lat":44.05086085198457,"lon":2.8038417830579565,"icon":""},{"text":"\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EBoll\u00e8ne\n\u003C/p\u003E\u003C/div\u003E","title":"Boll\u00e8ne\n","link":"","lat":44.302756729725445,"lon":4.736634247691538,"icon":""}]}
## Historique :

Cette liaison a vu le jour en 1952 lors de l'achèvement du barrage de Donzère-Montdragon (appelé aussi André Blondel). Pour l'établir, EDF réutilisa en totalité l'ancienne ligne 150KV Bagnols - Saint-Victor et érigea 23 pylônes nappes à 2 circuits de Vénéjan au barrage pour la coupler avec la ligne Pratclaux-Bollène, réalisée la même année. Un piquage fut créé à l'occasion dans le poste de Bagnols-sur-Cèze, basé sur la commune de Vénéjan.

Dans le contexte de développement du réseau 225 KV après Guerre, cela permit de créer une interconnexion à très haute tension entre la vallée du Rhône, le Massif central et les Pyrénées.

A partir des années 1970, la ligne a subi plusieurs modifications pour être aujourd'hui découpées en 3 sections bien distinctes.

#### *Evolution de la ligne à partir de 1970 :*

* Au début des années 1970, le piquage de Vénéjan est supprimé et les installations de Bagnols en grande partie démontées pour ne laisser que le poste 63 KV.
* En 1977 ou 1978, le poste de *Viradel* est créé pour renforcer l'alimentation d'Alès. Depuis Saint-Just-et-Vacquières, la ligne est alors déroutée au Nord sur 10km par des pylônes doubles drapeaux (création des lignes Bollène-Viradel et Viradel - Saint-Victor)
* Entre 1986 et 1989, un poste 225 KV est mis en service à Ganges , raccordé à la ligne par un pylône à 6 triangles.
* En 1999, la ligne est déposée sur 25 km entre Sabran et Saint-Just-et-Vacquières suite à la création d'une ligne 225 KV à deux ternes reliant Viradel au poste d'interconnexion de Tavel. La section isolée entre Sabran et Bollène est depuis exploitée en 63 KV.

## Description du tracé :

* Du barrage André Blondel, la ligne part vers le Sud, couplée avec la ligne Pratclaux-Bollène sur des pylônes nappes à double ternes.
* Arrivée aux abords du poste de Bagnols-sur-Cèze, à Vénéjan, les 2 lignes se séparent et se dirigent vers Saint-Nazaire. Celle qui nous intéresse bifurque ensuite au Sud-Ouest après avoir croisé la N86.
* Elle passe à l'Ouest de Bagnols puis suit la D6 sur plusieurs kilomètres avant de traverser la route dans la forêt de *Fontarèches*.
* Elle évolue dans une région boisée jusqu'à Euzet puis traverse ensuite les garrigues. Au sud de Vézénobres, elle franchit successivement la ligne des Cévennes, la N106 et le Gard.
* Après avoir croisé la D999, la ligne bifurque plein Ouest puis suit plus ou moins la route jusqu'à Ganges.
* A partir de Ganges, la ligne quitte les garrigues pour grimper sur les contrefort des Cévennes. Elle contourne la ville par le Nord puis franchit plusieurs vallées (dont les gorges de l'Hérault) avant d'atterrir sur les grands causses.
* La ligne évolue désormais sur les hauts plateaux. A Blandas, elle commence à remonter légèrement vers le Nord-Ouest puis traverse successivement les causses de Blandas, de Campestre et du Larzac. La ligne croise l'A75 à l'Hopitalet-du-Larzac et parcourt 6 km avant de tourner légèrement plus au Nord.
* Elle franchit ensuite la vallée du Soulzon et la ligne Béziers-Neussargues à Saint-Rome-de-Cernon puis par arpente encore 15 km avant d'entrer dans le poste de Saint-Victor, situé en surplomb des gorges du Tarn.

## Tronçons récupérés pour la création de nouvelles lignes :

* Ligne 225 KV - (Bollène-Viradel)
* Ligne 225 KV - (Ganges-Viradel)
* Ligne 225 KV - (Ganges - Saint-Victor)
* Ligne 225 KV - (Croisière-Bollène)
* Ligne 63 KV - (Sabran-Bollène)