Haut-Poirier comprises three infantry blocks and a small entry block. The blocks are linked by an underground gallery system containing barracks spaces, ammunition storage and utility services. The galleries are excavated at an average depth of up to . The provisional entry block is located a short distance behind the combat blocks, accessed by a large drain. The proposed new entrances would have been several hundred meters father back. •
Block 2: Infantry block with one GFM cloche and one retractable mixed arms turret. •
Block 3: Infantry block with two GFM cloches, one mixed arms cloche, one twin machine gun embrasure and two JM/AC 47 embrasures. The block was heavily damaged by German bombardment in 1940. Haut-Poirier also has two false cloches.
Casemates and shelters A series of detached
casemates and infantry shelters are in the vicinity of Haut-Poirier, including •
Casemate de Wittring: SIngle block with one JM/AC47 embrasure, one twin machine gun embrasure, two AM cloches and two GFM-B cloches. •
Casemate du Grand-Bois: SIngle block with one JM/AC47 embrasure, one twin machine gun embrasure, one AM cloche and two GFM-B cloches. • '''Casemate de Nord-Ouest d'Achen''': Double block with two JM/AC47 embrasures, one twin machine gun embrasure, one AM cloche and two GFM-B cloches. • '''Casemate de Nord d'Achen''': Double block with two JM/AC47 embrasures, two twin machine gun embrasures, one AM cloche and two GFM-B cloches. • '''Casemate de Nord-Est d'Achen''': Double block with two JM/AC47 embrasures, two twin machine gun embrasures, one AM cloche and two GFM-B cloches. == Manning ==