 Despite the efforts of 50 firefighters and a fire boat, most of the structure burned and collapsed into Kingman Lake.Since 1999, a variety of proposals have been made for Kingman and Heritage islands, most focusing on retaining the islands' character as one of the few remaining wild places within the city's limits.In December 2000, D.C. Mayor Anthony A. Williams signed an agreement with the Department of the Interior allowing the District government to retain ownership of Kingman and Heritage islands, even though the children's theme park had not been built.