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What was the original size of Ellis Island and how did it change?

Ellis Island was originally a small island of about 3 acres (1.2 hectares) in New York Harbor. Beginning in the late 19th century, the federal government greatly expanded it with landfill to accommodate the growing immigration station. By the 1930s the island had grown to about 27 acres (11 hectares). The additional land provided space for an expanding complex of administrative buildings, hospitals, dormitories, kitchens, and other facilities.