The flour mills, located on an island southeast of Tel ‘Akko, were powered by water, which was diverted to the mills by means of channels. The excavations exposed fifteen pairs of millstones set within five buildings. Pottery finds and Zanjid coins attest that the mills operated as early as the Crusader period (twelfth–thirteenth centuries CE); the main period of use was in the Ottoman period, from the eighteenth until the beginning of the twentieth centuries CE.