High Quality Content by WIKIPEDIA articles! Ouvrage Col du Fort was a lesser work (petit ouvrage) of the Maginot Line's Alpine extension, the Alpine Line. The ouvrage consisted of one infantry block and one observation block facing Italy. Additional blocks were planned but not built. Here is the list of all ouvrages of the Maginot Line, organized by sector and type of fortification. Ouvrage translates as "works" in English: published documents in both English and French refer to these fortifications in this manner, rather than as "forts". An ouvrage typically consists of a series of concrete-encased strongpoints, linked by underground tunnels.