 An American University biologist found that the bed of Kingman Lake was composed almost entirely of fecal matter, and warned that no one should swim in the lake due the extensive pollution.The immense amount of raw sewage in the lake was attributed to low water flows, and the lack of southern locks to allow water to more freely pass out of the lake.Nonetheless, a year later city officials were advocating that a playground be built on the shores of Kingman Island.