The buildings destined to store salt in Añana can be divided into two types: private and public. The former are also called 'terrazos' and were owned by salt workers. Such structures are mainly located under the threshing pits, taking advantage of existing holes between the walls of the terraces and the evaporation platforms. This building technique greatly facilitates the filling, because the salt is simply discharged by small holes in the surface of the threshing pits called 'boqueras' (sluices). The main function of these buildings is to hold the salt until transported to public warehouses located outside the exploitation. Añana had four of these buildings, which were built and controlled by the State during the monopoly of salt. They became known as El Grande, El Torco, Santa Ana and El Almacenillo del Campo. The whole production was kept there at the end of the season. In total they could store about 110,113 fanegas of salt (approximately 5,681,830 kg).