Ligne 60 KV - (Montréjeau-Marignac-Cier-de-Luchon) - Piquage

## Présentation:

La ligne à haute tension reliant les postes de Cier de Luchon à Montréjeau était une ancienne ligne à 60 KV construite en 1924 afin de permettre d'alimenter la caténaire de la voie ferrée Montréjeau-Luchon. Elle faisait un piquage au poste de Marignac alimentant en parti l'usine de la compagnie d'électricité industrielle.

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class=\"mw-parser-output\"\u003E\u003Cp\u003ECier de Luchon\n\u003C/p\u003E\u003C/div\u003E","title":"Cier de Luchon\n","link":"","lat":42.85359528105467,"lon":0.602399184141329,"icon":""},{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EMarignac\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":"Marignac\n","link":"","lat":42.91903585376029,"lon":0.6502102292027079,"icon":""},{"text":"\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EMontr\u00e9jeau\n\u003C/p\u003E\u003C/div\u003E","title":"Montr\u00e9jeau\n","link":"","lat":43.078536092662866,"lon":0.5718576552479249,"icon":""}]}
## Historique:

La voie ferrée de Montréjeau à Bagnère de Luchon a été créée entre 1873. En 1924, la ligne électrique fut construite afin d'alimenter la future caténaire sur la ligne de train. Le vendredi 2 janvier 1925, la caténaire fut achevée et mise sous tension. La ligne fut raccordée à la centrale de Cierp Gaud vers 1950. Entre 1960 et 1966, le piquage de Marignac est démonté suite au raccordement de l'ancienne ligne à 150 KV.

Du fait de la normalisation des tensions des lignes électriques, et du choix du 63 KV pour les petites lignes à haute tension dès les années 50, la section entre Cierp Gaud et Montréjeau fut reconstruite avec la mise en place principalement de pylônes à 3 Triangles entre 1985 et 1988. Cependant, la section entre Cierp Gaud et Cier de Luchon est pratiquement encore d'origine aujourd'hui. En 2018, du fait de la mauvaise posture de la voie ferrée, la caténaire a été retirée cependant, la ligne électrique subsiste toujours.

## Description du tracé:

* La ligne électrique démarrait à la sous-station de Cier de Luchon et allait en direction du nord, elle passe sur la voie ferrée puis sur la Pique. Après être passé sur la D27, elle repassait sur la Pique.
* Après avoir longé la ligne de chemin de fer, elle repassait sur la Pique puis la N125.
* Après avoir passé à mainte reprise sur la N125 et la Pique, elle finissait par arriver à Cierp Gaud. C'est à cet instant qu'elle s'éloignait de la voie ferrée. À proximité de l'usine de Marignac, elle faisait un piquage pour alimenter son poste électrique.
* Elle franchissait la Garonne avant de se redirigeait vers le nord-ouest. Vers Fronsac, elle passait sur la voie ferrée puis sur la Garonne.
* Un peu avant Labroquère, la ligne électrique passait sur la Garonne ensuite sur la ligne de chemin de fer puis en dessous de la ligne à 150 KV reliant Grabes à Lannemezan.
* En sortant des montagnes au niveau de croisement entre la N125, la D8 et la D8ᴬ, la ligne électrique se redirigeait vers la sous-station de Montréjeau pour s'y arrêter.

## Tronçon récupéré pour la création d'une nouvelle ligne:

1. Ligne 63 KV - (Cier-de-Luchon-Cierp).
2. Ligne 63 KV - (Cierp-Gaud-Marignac-Montréjeau) - Piquage. ?
3. Ligne 63 KV - (Cierp-Gaud-Montréjeau).