Ouvrage du Kobenbusch is a gros ouvrage of the Maginot Line, located in the Fortified Sector of Thionville in the Cattenom Forest. It possesses seven combat blocks and two entrance blocks, one for ammunition and the other for men. It is located between petit ouvrage Bois-Karre and petit ouvrage Oberheid, and was named for the surrounding Kobenbusch Forest. The position saw little action during World War II. Its deep passages have been flooded by the construction of a cooling water lake for a nearby nuclear power plant, but its surface features are being developed with an interpretive path through the surrounding forest. Design and construction The Kobenbusch position forms the point of the Cattenom salient, where the east-west defensive line turns to the south. The site was surveyed by CORF (Commission d'Organisation des Régions Fortifiées), the Maginot Line's design and construction agency, in 1930. Work by the contractor Verdun-Fortifications began in 1931, and the position became operational in 1935, at a cost of 65 million francs. Kobenbusch was served by a 60 cm-gauge narrow-gauge railway, which enters at the munitions entrance and runs all the way out through the galleries to the combat blocks. On the surface, the railway connects to supply points to the rear and to other ouvrages. Description Kobenbusch is a relatively compact gros ouvrage, with a short main gallery leading from the munitions and personnel entrances past to underground barracks to the combat blocks. Unusually for a gros ouvrage, it possesses no "M1" main ammunition magazine. Ammunition entrance: Shaft entry, two automatic rifle cloches (GFM), 3 FM embrasures and a machine gun/47 mm anti-tank gun (JM/AC47) embrasure. Personnel entrance: Shaft entry, one GFM cloche and one JM/AC47 embrasure. Block 1: one machine gun turret and GFM cloche. Block 2: one machine gun embrasure (JM), a JM/AC47 embrasure and two GFM cloches. Block 3: one observation cloche (VDP) and a GFM cloche. Block 4: one machine-gun turret, a machine gun cloche (JM) and a GM cloche. Block 5: one 75 mm turret and a GFm cloche. Block 6: one 50 mm mortar turret and a GFM cloche. Block 7: three 75 mm gun embrasures, two GFM cloches and a grenade launcher cloche (LG). . Casemates and shelters The Abri du Bois-de-Cattenom is nearby to the west, and may be visited. There are no other casemates, observation points or shelters associated with Kobenbusch, although the petit ouvrage Oberheid