The infectious agent Hantavirus was first identified in the Hantan River area by Dr. Lee Ho-wang. Because his original publications transliterated the river's name idiosyncratically as "Hantaan," this spelling remains associated with the "Hantaan virus." In 2007 construction of the Hantangang Dam began on its lower course. It is expected to be complete in mid-2015. The sole purpose of the dam is flood control.