Ligne 63 KV - (Balma-poste-Portet-Saint-Simon)

### Nombre de pylônes:

22 à 3 Triangles + 8 à 4 Triangles + 2 Drapeau + 4 Portiques métalliques + 47 à 6 Triangles + 1 poteau à 6 triangles

## Détails:

### Date de création:

Tronçon Saint-Orens-Portet (ancienne ligne Lintin-Portet): 1926Tronçon circuit simple (Saint-Orens-Balma): entre 1955-1957

Tronçon circuit double: 1971-1972

### Date de suppression:

Tronçon Lespinet-Portet-Saint-Simon: mai 2019

## Présentation:

La ligne à haute tension reliant Balma à Portet sur Garonne est une ancienne ligne de 63 kilovolts qui a entièrement disparu.

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 **Rose** | Tracé en circuit simple créé entre 1955 et 1957 et tronçon de la ligne 63 KV (Lespinet-Portet).

## Historique:

Une première ligne électrique fut construite par la compagnie du Midi en 1926. Cette ligne électrique permettait de connecter le Massif central à la région toulousaine par un réseau à haute tension via la ligne Lintin-Saint-Victor.

La ligne n'évolua peu jusqu'entre 1955 et 1957, date ou la ligne est partiellement reconstruite avec un nouveau tracé plus au sud entre la D54 et Portet. L'idée était de réutiliser l'ancien tracé pour créer une ligne qui reliait Portet à Balma. De nouveaux pylônes à 3 Triangles sont donc placés entre Balma et la D54.

Entre 1971 et 1972, la ligne est partiellement reconstruite en double circuit entre Balma et Lespinet, mais elle sera exploitée qu'en circuit simple. Les anciens pylônes entre la D54 et Lespinet seront toutefois conservés pour créer une ligne à moyenne tension.

En 1977, la ligne est fractionnée en deux au nouveau poste de Lespinet. Elle forme ainsi les lignes Balma-Lespinet et Lespinet-Portet.

Suite à la construction d'un Leclerc à Saint Orens en 1990, des pylônes qui étaient utilisés pour une ligne à moyenne tension sont démontés. La ligne Balma-Lespinet est ensuite fracturée et raccordée au poste de Saint Orens, lors de sa création entre 1993 et 1995.

En mai 2019, la ligne reliant Lespinet à Portet sur Garonne est démontée suite au raccordement en double circuit de la ligne reliant Saint Orens à Lespinet et du remplacement d'un câble par un nouveau doté d'une fibre optique.

## Description du tracé:

* La ligne électrique débutait au poste de Balma.
* Elle contournait les zones urbaines par le nord et l'est jusqu'à la ligne à 225 KV reliant Portet sur Garonne, Saint Orens et Verfeil.
* Elle longeait la ligne jusqu'à l'A61 avant de se rediriger vers l'A623
* Elle continuait en direction du centre-ville de Ramonville puis continuait son chemin vers les quartiers de Gleyze-Vieille puis vers Toulouse.
* Elle traversait un grand vallon dans lequel coule les ruisseaux de Bonneval et de Vieille-Toulouse avant de passer sur la Garonne.
* Elle se poursuivait en direction de la zone commerciale de Portet sur Garonne ou elle passait sur le Carrefour, le Norauto, La Halle aux chaussures et le Jour de fête.
* Elle traversait un champ, passait sur une résidence avant de s'arrêter au poste électrique de Portet-Saint-Simon.

## Note:

Cette ligne électrique avait principalement des pylônes possédant 3 triangles, mais leur forme est une variante du pylône 4 triangles assez communs dans le sud-ouest. C'était la seule possédant cette forme. En effet, les bras des pylônes s'abaissent en 2 parties ce qui donne un aspect d'arrondi. Malgré le fait que la plupart des pylônes étaient des pylônes à 3 triangles, il y en avait pas mal à 4 triangles notamment aux endroits où elle tournait.

## Ancienne ligne:

1. Ligne 150 KV - (Lintin-Portet-Saint-Simon).

## Tronçons récupérés pour la création de nouvelles lignes:

1. Ligne 63 KV - (Lespinet-Portet-Saint-Simon).
2. Ligne 63 KV - (Balma-poste-Lespinet).
3. Ligne 63 KV - (Balma-poste-Saint-Orens).
4. Ligne 63 KV - (Saint-Orens-Lespinet).