Ouvrage Saint-Antoine is a work of the Maginot Line's Alpine extension, the Alpine Line. The ouvrage consists of one entry block, one infantry block and one artillery block overlooking Modane on the way to the Col du Mont Cenis. Ouvrage Saint-Gobain is just to the north, across the mountain valley. Saint-Antoine overlooks the approaches to the Fréjus Rail Tunnel and was part of an ensemble of forts, including Saint-Gobain, Ouvrage Sapey and Fort du Replaton that guarded the French end of the tunnel and the descent from the Mont Cenis pass.
Ouvrage Col de Buffere is a lesser work of the Maginot Line's Alpine extension, the Alpine Line. The ouvrage consists of one combat block at an altitude of 2,393 metres (7,851 ft) on the Col de la Buffère. Additional blocks were planned but not built or were left incomplete.
Ouvrage Col du Granon is a lesser work of the Maginot Line's Alpine extension, the Alpine Line. The ouvrage consists of one entry block, one infantry block and one observation block covering the Col du Granon as part of the defenses of Briançon and Grenoble. The ouvrage lies at an altitude of 2,329 metres (7,641 ft).
Ouvrage Les Aittes is a lesser work of the Maginot Line's Alpine extension, the Alpine Line. The ouvrage consists of one entry block, three infantry blocks and one observation block, about two kilometers east of Cervières, Hautes-Alpes at an altitude of 2,029 metres (6,657 ft)..
Ouvrage Saint Ours Haut is a work of the Maginot Line's Alpine extension, the Alpine Line, also known as the Little Maginot Line. The ouvrage consists of one infantry block, one artillery block, two observation blocks and one combination block in the vicinity of the Col de Larche. It is located on the territory of the commune of Meyronnes. Construction began in March 1931, at a cost of 15.1 million francs.
Ouvrage Plate Lombard is a lesser work of the Maginot Line's Alpine extension, the Alpine Line. The ouvrage consists of one entry block, two infantry blocks and one observation block. Unusually for an ouvrage, Plate-Lombard was built by MOM, which usually was responsible for lesser fortifications. The isolated position was commanded in 1940 by Lieutenant de Loye. It controlled the Fouillouse valley and the Col du Vallonet.
Ouvrage Fontvive Nord-ouest is a lesser work of the Maginot Line's Alpine extension, the Alpine Line. The ouvrage consists of two infantry blocks. While it is listed in some sources as an ouvrage owing to its construction by CORF, it is more like an infantry abri or shelter.
Ouvrage Saint Ours Nord-est is a lesser work of the Maginot Line's Alpine extension, the Alpine Line. The ouvrage consists of two infantry blocks. The associated underground support galleries are arranged with a short gallery connecting Blocks 1 and 2, with parallel stubs at Block 2. While it is listed in some sources as an ouvrage owing to its construction by CORF, it is more like an infantry abri or shelter.
Ouvrage Restefond is a work of the Maginot Line's Alpine extension, the Alpine Line. The ouvrage consists of one artillery block and three observation blocks at the summit of the Col de la Bonette. The entry block and an artillery block were not completed, and a further block was never built. At 2,733 metres (8,967 ft), Restefond is the highest Maginot ouvrage.
Ouvrage Col de Restefond is a lesser work of the Maginot Line's Alpine extension, the Alpine Line. The ouvrage consists of three infantry blocks. It is located directly adjacent to the Col de Restefond road at an altitude of 2,680 metres (8,790 ft). Construction work was completed in 1934, but the ouvrage was not armed until 1938.
Ouvrage Granges Communes is a lesser work of the Maginot Line's Alpine extension, the Alpine Line. The ouvrage consists of one infantry block facing Italy. Additional blocks were planned but not built. Granges Communes is located about four kilometers northeast of Ouvrage Restefond on the Col de Raspaillon at an altitude of 2,525 metres (8,284 ft).
Ouvrage La Moutière is a lesser work of the Maginot Line's Alpine extension, the Alpine Line at an altitude of 2440 meters. The ouvrage consists of one entry block, one infantry block and one observation block, with an unarmed exit block. The ouvrage supported the Ouvrage Restefond on the crest of the pass, guarding its southern flank. It also covered the Col de la Barcelonnette to the north. The position was built between 1931 and 1935.
Ouvrage Valdeblore is a lesser work of the Maginot Line's Alpine extension, the Alpine Line. The ouvrage consists of one entry block, one infantry artillery block and one observation block at an altitude of 842 metres (2,762 ft). Valdeblore was built starting in November 1930 by Poiljeux contractors, and was completed by Thorrand et Cie in April 1933 at a cost of 1.6 million francs.
Ouvrage Col du Caire Gros is a lesser work of the Maginot Line's Alpine extension, the Alpine Line. The ouvrage consists of two entry blocks at an altitude of 2,048 metres (6,719 ft). Additional blocks were planned but not built.
Ouvrage Baisse de Saint Véran is a lesser work of the Maginot Line's Alpine extension, the Alpine Line. The ouvrage consists of one infantry block facing Italy. Three combat blocks and an entrance block were planned, but only Block 2 was built, with one observation/light machine gun cloche, three light machine gun embrasures and one heavy twin machine gun embrasure at an altitude of 1915 meters. However, armament was never furnished and the cloche was not fitted. Almost none of the supporting subterranean galleries were completed. The position was manned in 1940 by 68 soldiers of the 40th Demi-Brigade des Fusiliers Alpins under Sub-Lieutenant Kessler.
Ouvrage La Déa, also known as the Petit Ouvrage de la baisse de la Déa, is a lesser work of the Maginot Line's Alpine extension, the Alpine Line. The ouvrage consists of two entry blocks and one observation block facing Italy at an altitude of 1,777 metres (5,830 ft), armed with one observation cloche and one machine gun embrasure. The ouvrage was manned by 81 soldiers in 1940, and commanded by sous-lieutenant Guillemin. The position was sited to control the Maglia valley. A fourth block with three machine gun positions was not built.
Ouvrage Champ de Tir, also known as Champ de Tir de l'Agaisen is a lesser work of the Maginot Line's Alpine extension, the Alpine Line. It is located at an altitude of 672 metres (2,205 ft), less than 1 kilometer to the northwest of Ouvrage l'Agaisen. The ouvrage consists of two entry blocks and one infantry block, sited to control the valley of the Nieya and to observe for l'Agaisen.
Ouvrage Col de Garde is a lesser work of the Maginot Line's Alpine extension, the Alpine Line, also called the Little Maginot Line. The ouvrage consists of two entry blocks, one infantry block and one observation block, slightly more than 1 km south of Sainte-Agnès.
Ouvrage Croupe du Réservoir is a lesser work of the Maginot Line's Alpine extension, the Alpine Line. Located on the heights of Roquebrune at an elevation of 139 meters, the ouvrage consists of one entry block and one observation block facing Italy and covering the Grande Corniche road. The fortification was manned by 60 troops of the 58th Demi-Brigade Alpin de Forteresse (DBAF) under the command of sous-lieutenant Roman.
Ouvrage Col des Banquettes is a lesser work of the Maginot Line's Alpine extension, the Alpine Line, also called the "Little Maginot Line". The ouvrage consists of two entry blocks and one infantry block facing Italy at the top of the Col des Banquettes, 2 km northwest of Saint-Agnès. The position controlled the pass of the same name and was covered by Ouvrage Sainte-Agnès and the positions at Pic-de-Garuche.
