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

### Nombre de pylônes:

242 à 3 Triangles + 38 à 4 Triangles (39 avant 1962-1964) + 6 Portiques métalliques + 51 à 3 Triangles (gros) + 7 à 4 Triangles (gros)

## Détails:

### Date de suppression:

Tronçon entre Montans-Lespinet et le Garric-Brens: entre 1983 et 1984 - Ligne Brens-Gaillac: juillet 2013 - Ligne Lespinet-Portet-Saint-Simon: mai 2019

## Présentation:

La ligne à haute tension reliant Lintin à Portet sur Garonne est une ancienne ligne de 150 kilovolts datant de la première moitié du XXème. Aujourd'hui il ne reste presque plus rien d'elle. Les seuls vestiges qui restent d'elle sont les arbres coupés sur son tracé de Lespinet à Portet sur Garonne et un tronçon en piquage allant à Lintin (Taïx) depuis la ligne Pelissier - Pré-Grand. Jusqu'en 2013, il existait une autre section qui correspondait en partie à la ligne reliant Brens à Gaillac.

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class=\"mw-parser-output\"\u003E\u003Cp\u003EPortet-Saint-Simon\n\u003C/p\u003E\u003C/div\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003ELiaison souterraine\n\u003C/p\u003E\u003C/div\u003E","title":"Portet-Saint-Simon\n","link":"","lat":43.52894534757721,"lon":1.3885003789263237,"icon":""},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EPortet-Saint-Simon\n\u003C/p\u003E\u003C/div\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EJusqu'entre 1926-1929 et 1960\n\u003C/p\u003E\u003C/div\u003E","title":"Portet-Saint-Simon\n","link":"","lat":43.528474148984245,"lon":1.3883596658706665,"icon":""},{"text":"\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003ELintin\n\u003C/p\u003E\u003C/div\u003E","title":"Lintin\n","link":"","lat":44.00862469813594,"lon":2.1444856228040408,"icon":""}]}

 **Violet foncé:** | Tronçon recréé après création de la ligne Balma-Poste-Potet-Saint-Simon. Mise en double circuits en 1968.

## Historique:

Construite en 1926 par la compagnie du Midi, 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, époque où elle 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 63 KV qui reliait Portet à Balma.

En 1968, le tronçon entre la D58 à Lavalette et Portet fut reconstruit en double circuit, mais ce dernier ne fut exploité qu'en circuit simple jusqu'en 1980 (date de mise en service du poste électrique de Verfeil). Entre 1971 et 1972, la ligne Balma-poste-Portet est partiellement reconstruite en double circuit entre Balma et Lespinet, mais cette dernière 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 Balma-Portet est fractionnée en deux au nouveau poste de Lespinet. Elle forme ainsi les lignes Balma-Lespinet et Lespinet-Portet.

La mise en service du poste de Verfeil en 1980 entraine la fin de l’exploitation en 150KV. Le tronçon historique entre Lintin et Lavalette est mis hors tension et déconnecté de la section en double circuit Portet-Lavalette, qui est quant à elle utilisée pour créer une liaison 225KV Portet-Verfeil.

Entre 1983 et 1984, les sections entre Lintin et la D90, entre la D25 et le barrage de Rivières et entre Camperdut et la D58 sont démontés. Certaines portions sont toutefois préservées pour la création de nouvelles lignes à 63 kilovolts comme le piquage de Lintin connecté à un nouveau poste électrique et la ligne Brens-Gaillac.

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.

En 1998, le piquage de Lintin est mis hors tension suite à la déconstruction du nouveau poste. Ce processus fait suite à l'arrêt de la dernière mine de charbon du Carmausin en 1997. Les deux lignes alimentant ce dernier sont toutefois conservées.

En Juillet 2013, la ligne aérienne est démontée entre Brens et Gaillac suite à la construction de deux lignes enterrés,

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.

## La ligne de nos jours :

La ligne a quasiment disparue du paysage aujourd’hui. Il ne reste d’elle que 5 pylônes d’un court tronçon désaffecté entre la ligne 63KV Pelissier – Pré-Grand  et la D25 près de l’ancien poste de Lintin.

## Description du tracé:

* La ligne débutait au poste de Lintin et se dirigeait vers Brens.
* Elle passait à proximité du barrage de Rivières situé sur le Tarn.
* Après être passé sur la D12, elle tournait en direction de Sains Orens en Haute-Garonne.
* Elle longeait la vallée du Tarn jusqu'au niveau de Saint Sulpice la Pointe, entre la D38 et la D630.
* Arrivé au niveau de Flourens et à l'ouest de Sains Orens, elle tournait deux fois pour se rediriger vers Ramonville Saint Agne.
* Elle traversait ensuite un grand vallon dans lequel coule les ruisseaux de Bonneval et de Vieille-Toulouse avant de passer sur la Garonne.
* Elle traversait encore quelques champs 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. De plus, entre Lintin et la D6, la forme des pylônes n'était pas la même que sur le reste de la ligne. Ces derniers étaient beaucoup plus gros afin d'être plus adaptés au sol et au variation du relief qui est plus contrasté.

## Tronçons récupérés pour la création de nouvelles lignes:

1. Ligne 63 KV - (Lespinet-Portet-Saint-Simon).
2. Ligne 63 KV - (Brens-Gaillac).
3. Ligne 63 KV - (Balma-poste-Portet-Saint-Simon).
4. ~~Ligne 150 KV - (Lintin-Lavalette).~~ ???
5. Piquage 63 KV - Lintin.