Ouvrage Cave-à-Canon is a lesser work of the Maginot Line's Alpine extension, the Alpine Line. Started in 1937, the ouvrage consists of one infantry block about one kilometer east of Bourg St. Maurice, on the south bank of the Isère. A short gallery with cross galleries extends into the rock, with an emergency exit and ventilation shaft halfway back. The ouvrage was incomplete in 1940, under the command of Lieutenant Courteaud.
Ouvrage Saint-Gobain is a work of the Maginot Line's Alpine extension, the Alpine Line. The ouvrage consists of one entry block, one infantry block, one artillery block, one observation block and one combination block. Located in Modane, France, it is just across the valley of the Arc from Ouvrage Saint-Antoine and somewhat to the east of Ouvrage Sapey.
Ouvrage Le Lavoir Is a 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, three artillery blocks and one observation block 6 kilometres (3.7 mi) south of Modane, France, guarding the Col de Fréjus. The surface barracks at Le Lavoir were connected to Charmaix by an aerial tram.
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 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 Bonnette. 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 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 Fressinéa, also known as Fraisinéa or Frassinéa 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 at an altitude of 482 metres (1,581 ft). It is associated with the gros ouvrage of Rimplas, the first Maginot fortification to be constructed anywhere. Fressinéa was built between November 1930 and April 1934, accommodating 30 soldiers under a lieutenant with two months of provisions. The initial contractor was Pioljeux. Construction was finished by Thorrand et Cie for 1.7 million francs.
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 Gordolon 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 and two infantry blocks at an altitude of 728 metres (2,388 ft). Gordolon was built by Borie contractors at a cost of 21.4 million francs. Work started in November 1931 and was completed in April 1934.
Ouvrage Flaut is a work of the Maginot Line's Alpine extension, the Alpine Line, also called the Little Maginot Line. The ouvrage consists of one entry block, one infantry block and one artillery block at an altitude of 771 metres (2,530 ft). The position was intended, acting with Ouvrage Gordolon, to stop an approach by Italian forces from the north towards Nice through the Vésibie Valley.
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 Plan Caval is a lesser work of the Maginot Line's Alpine extension, the Alpine Line, also known as the Little Maginot Line. The ouvrage consists of two infantry blocks and one observation block facing Italy. The ouvrage is located on the heights of L'Authion, surrounded by older fortifications. Three additional blocks were planned to make it a gros ouvrage but were not built. Cost for the full ensemble was estimated at 23 million francs.
Ouvrage Col de Brouis 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 entry block and two artillery blocks facing Italy at an altitude of 871 metres (2,858 ft). The ouvrage is located about one kilometer north of Monte Grosso. It was placed to control the Col de Brouis and the D 2204 road between the Breil and Sospel.
Ouvrage Monte Grosso 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 entry block, four artillery blocks and two observation blocks facing Italy. It was the largest ouvrage in the Alps It is part of the fortifications surrounding Sospel, which protect the approaches to Nice from the north.
Ouvrage Saint-Roch is a work of the Maginot Line's Alpine extension, the Alpine Line, also known as the Little Maginot Line. Small for a gros ouvrages, the ouvrage consists of one entry block, one artillery block and two observation blocks overlooking Sospel at an altitude of 426 metres (1,398 ft). The position is located just to the southwest of Sospel, its entrance block in a narrow valley and the artillery block on the other side of the ridge overlooking Sospel. The ouvrage is laid out along a single line, with the entry block to the rear, immediately followed by the usine, with barracks farther along and Blocks 2 and 3 at intervals. The position's main armament is concentrated in Block 4, a massive blockhouse designed to protect against rockfalls from higher up the mountain.
Ouvrage Chesnois, also known as Ouvrage Chênois, is a gros ouvrage of the Maginot Line, located in the Fortified Sector of Montmédy, facing Belgium. The ouvrage lies between the towns of Montlibert and Thonne-le-Thil. It possesses six combat blocks. It is located between gros ouvrage Thonnelle and petit ouvrvage La Ferté. The position was sabotaged and abandoned by French forces that were ordered to retreat from the exposed position in June 1940 during the Battle of France. The ouvrage is now abandoned and sealed.
