Ligne 150 KV - (Bayet - La Boulaye)

### Date de suppression:

Suppression partielle :En 1953 de Toulon-sur-Arroux à La Boulaye et de 1998 à 2006 entre Saint-Agnan et Saligny-sur-Roudon

## Présentation :

La ligne Bayet - La Boulaye est une ancienne ligne à haute tension qui reliait le poste d'interconnexion de Bayet au poste de coupure de La Boulaye. Il s'agit d'un prolongement de l'axe Bayet-Gueugnon jusqu'à l'artère 150 kilovolt Garchizy - Henri-Paul. Cette liaison électrique a eu une existence éphémère.

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class=\"mw-parser-output\"\u003E\u003Cp\u003EBayet\n\u003C/p\u003E\u003C/div\u003E","title":"Bayet\n","link":"","lat":46.27311805074762,"lon":3.29194509075891,"icon":""},{"text":"\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003ELa Boulaye\n\u003C/p\u003E\u003C/div\u003E","title":"La Boulaye\n","link":"","lat":46.72882552847024,"lon":4.130372521630781,"icon":""}]}
## Historique :

La Société de Transport d'Energie du Centre (STEC) entreprit en 1931 la construction d'une liaison électrique à grande capacité entre Rueyres et Gueugnon, via Clermont-Ferrand et Bayet, afin d'interconnecter le complexe hydroélectrique Sarrans-Brommat sur la Truyère avec le bassin industriel et minier de Saône-et-Loire. La section Bayet-Gueugnon était alors exploitée sous la tension de 120 000 volts.

La puissance importante des deux usines de la Truyère incita la STEC à opter très vite pour le 150 000 volts sur son réseau. Pour maintenir l'interconnexion vers Paris et les Alpes sous cette nouvelle tension, elle dû shunter le poste 120 KV de Gueugnon au début des années 1940 et prolonger sa ligne vers l'artère à 150 KV Garchizy - Henri-Paul (établie en 1936). A cette occasion, un poste de coupure fut créé sur cette dernière à La Boulaye*.*

Cette liaison n'exista qu'une quinzaine d'année environ car EDF, qui avait récupéré l'ensemble du réseau électrique nationale, décida dès 1953 de relier directement les postes de Bayet et Henri-Paul. Elle créa alors 30 km de ligne entre Toulon-sur-Arroux et Ecuisses et déposa le tronçon entre Toulon et La Boulaye. Le poste de la Boulaye fut démonté peu de temps après.

Le reste de la ligne sera exploitée en 150 KV jusqu'à la fin des années 1970.

## La ligne de nos jours :

Depuis 1979, la ligne a été fragmentée à plusieurs reprises suivant l'évolution du réseau régional. Elle est réutilisée aujourd'hui par les réseaux à 63 000 volts respectifs de l'Allier et de Saône-et-Loire. Elle a été démontée sur 13 km entre Saint-Agnan et Saligny-sur-Roudon.

La plateforme du poste de La Boulaye est encore présente aujourd'hui; elle est utilisée par un magasin de machines agricoles.

## Description du tracé

* Depuis le poste de Bayet, la ligne part vers le Nord-Est. Elle bifurque ensuite vers l'Est aux abords de la D46, franchit l'Allier puis croise la voie ferrée Paris-Clermont-Fd au Nord de Varennes-sur-Allier.
* Elle garde la même direction sur environ 15km, longeant plus ou moins la D21 jusqu'aux abords de Jaligny-sur-Bresbe.
* Elle tourne alors légèrement plus au Nord pour éviter le village puis franchit la Bresbe. Elle croise ensuite la D53 puis arrive à Saligny-sur-Roudon, où elle est aujourd'hui interrompue un peu avant la D55.
* A l'époque, elle poursuivait dans la même direction quasiment jusqu'à Gueugnon; elle croisait la N79 et l'ancienne ligne 63 KV Digoin-Dompierre ,passait à l'Ouest de Pierrefitte-sur-Loire puis franchissait la Loire quelques km plus loin.
* Arrivée en Saône-et-Loire, elle croisait aussitôt la voie ferrée Moulins - Paray-le-Monial puis évoluait en direction des "Grands Bois", lieu-dit qui marque la fin de la partie déposée.
* La ligne passe ensuite à 1km au Sud de Neuvy-Grandchamp puis croise la D60 à Curdin. Elle tourne ensuite progressivement en contournant Gueugnon puis part vers le Nord à proximité du poste électrique.
* Après Gueugnon, la ligne longe la D994 jusqu'à Toulon-sur-Arroux. D'abord par l'Ouest puis par l'Est après avoir croisé la route au niveau du ruisseau de Prama. A Toulon-sur-Arroux, elle bifurque plein Nord au niveau de la Rue de la Vendée (photo ci-contre).
* Le pylône d'angle au Nord de la D240 marque le début de la ligne vers Henri-Paul construite par EDF en 1953. Avant cette date, la ligne tournait légèrement vers le Nord-Est pour rejoindre la D994. Elle suivait ensuite la route jusqu'au poste de La Boulaye.

## Tronçon récupérés pour la création de nouvelles lignes :

1. Ligne 150 KV - (Bayet - Henri-Paul)
2. Ligne 150 KV - (Gueugnon - Henri-Paul)
3. Ligne 63 KV - (Bayet-Dompierre)
4. Ligne 63 KV - (Dompierre - Varennes-sur-Allier)
5. Ligne 63 KV - (Gueugnon-Sornat)
6. *Ligne 63 KV - (Dompierre - Le Donjon - Varennes)- piquage* *disparue*
7. *Ligne 63 KV - (Gueugnon - Digoin)* *disparue*
8. Ligne 63 KV - (Gueugnon - Dettey - Henri-Paul) - Piquage