The river is 439 kilometres (273 miles) in length, and is generally deep. It is the fifth-longest river on the Korean peninsula and the second-longest in North Korea. Pyongyang is approximately 110km upstream from the mouth, Sunchon 192km upstream, and Taehŭng 414km upstream.[citation needed] Because of its depth, it is widely used for river transport; it is navigable by large ships up to 65km inland, although most commercial traffic stops at Songrim.
History
The kingdom of Goguryeo was founded on its banks. Many archeological sites dating to the Neolithic and Bronze Age, as well as relics and ruins from Goguryeo have been found along the river. It was also once known as the Pae River (패수;浿水;P’aesu).[4]
In 1986, the government completed the 8-km-long West Sea Barrage, with three locks and 36 sluices, at the mouth of the Taedong River near Namp'o.[3] The dam acts to control floodwater and to irrigate lands newly reclaimed from the Korea Gulf.[3] The dam prevents mixing of the outgoing river water with seawater, leading to an increase of contaminants concentration.[7] Other dams, such as the Nyongwon Power Station, have been built to provide energy to the country.[8]