On May 1, 2003 the Navy finished turning over all of its lands to the U.S. Department of the Interior. This included the Navy's entire eastern portion of the island — 14,573 acres (58.97 km2), which had mainly been used as a dumping ground. McCaffrey cites data from the U.S. Navy: "Vieques was bombed an average of 180 days per year. In 1998, the last year before protests interrupted maneuvers, the navy dropped 23,000 bombs on the island, the majority of which contained explosives."