Ligne 60 KV - (Montréjeau-Lannemezan) - Piquage

D74: entre 1980 et 1983

## Présentation:

La ligne à haute tension reliant les sous-stations de Montréjeau à Lannemezan est une ancienne ligne de 60 KV créée en 1914 située dans les départements de la Haute-Garonne et des Hautes-Pyrénées en région Occitanie. Elle faisait un piquage aux deux sous-stations.

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class=\"mw-parser-output\"\u003E\u003Cp\u003EMontr\u00e9jeau (SNCF)\n\u003C/p\u003E\u003C/div\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EPiquage\n\u003C/p\u003E\u003C/div\u003E","title":"Montr\u00e9jeau (SNCF)\n","link":"","lat":43.07849886331947,"lon":0.5717128152621997,"icon":""},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003ELannemezan (SNCF)\n\u003C/p\u003E\u003C/div\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EPiquage\n\u003C/p\u003E\u003C/div\u003E","title":"Lannemezan (SNCF)\n","link":"","lat":43.113552375801504,"lon":0.3928041478774569,"icon":""}]}
## Historique:

La voie ferrée de Toulouse à Bayonne a été créée entre 1861 et 1867 et a été électrifiée entre 1913 et 1930. La ligne à haute tension de Montréjeau à Lannemezan a quant à elle été créée en 1914 et fut originellement exploitée en double ligne biphasée à 28 000 volts afin d'électrifier la caténaire de la voie ferrée.

Suite à la normalisation dès 1921 par l'État pour un courant continu en 1500 V, une restructuration du système de la caténaire a été réalisée en 1923 avec la réutilisation des supports d'origine pour la création d'une ligne triphasée à 60 KV.

La ligne est finalement démontée en 1949 suite à la mise en service des lignes reliant Pointis de Rivière à Montréjeau et Lannemezan à Montréjeau. Une petite section ne sera cependant pas démontée au niveau de la D74 jusqu'entre 1980 et 1983.

Comme elle permettait de raccorder une partie de la voie ferrée au réseau électrique, elle suivait intégralement la ligne de chemin de fer à quelques exceptions près. En 2017, la voie ferrée subit une modernisation et la quasi-totalité des supports caténaires du Midi sont remplacés.

## La ligne de nos jours:

Actuellement, il ne reste pratiquement rien de cette ancienne ligne ou des supports caténaires du Midi. Il reste toutefois un portique à l'est du poste de Lannemezan qui appartenait à cette ligne et qui n'a jamais été enlevé. Il reste aussi quelques bases des anciens supports caténaire du Midi qui n'ont pas été retirés lors de la modernisation de 2017.

## Description du tracé:

* La ligne à haute tension débutait au nord de la voie ferrée (juste à l'ouest de la gare de Montréjeau). Elle longeait légèrement la voie ferrée au nord avant de la traverser et de la longer par le sud.
* Après être passé sur la Garonne, elle croisait la ligne à 60 KV reliant Lannemezan à Montréjeau, la D34**ᴱ** puis passait sous la ligne à 150 KV reliant Lannemezan à Portet.
* Plus loin, elle croisait la N638 tout en montait progressivement la colline au nord de la Neste jusqu'à arriver sur le plateau de Lannemezan.
* C'est qu'après être passé deux fois sur le canal de la Neste, sur la N129 et sous les lignes à 220 KV reliant Lannemezan à Verlhaguet, et les deux lignes à 150 KV reliant Lannemezan à Portet qu'elle arrivait au poste de Lannemezan.

## Nouvelle tension:

1. Ligne 63 KV - (Montréjeau-Lannemezan) - Piquage.