Hwanggang Dam
The 928th tallest dam in the world
Hwanggang Dam is a hydroelectric dam on the Imjin River in Tosan County, North Korea. Located about 26 miles (42 km) north of the Korean Demilitarized Zone, the dam has an estimated capacity of 400,000,000 short tons (360, 000, 000 t). Construction began in 2002 and was completed in 2007. The stated aims of the project are to generate hydropower and provide water for crop irrigation. However it is also widely thought that the dam is to protect against the perceived North Korea / South Korea threat. South Korea also built two of its own dams in the area in the early 2010s.
Dam data from Wikidata (CC0) plus curated additions. Summary from Wikipedia (CC BY-SA).