| Sup'ung Dam | |
|---|---|
 | |
  Location of Sup'ung Dam in China  Sup'ung Dam (North Korea) | |
| Country | China/North Korea |
| Location | Liaoning Province/North Pyongan. |
| Coordinates | 40°27′43″N 124°57′45″E / 40.46194°N 124.96250°E |
| Status | Operational |
| Construction began | 1937 |
| Opening date | 1943 |
| Dam and spillways | |
| Type of dam | Gravity |
| Height | 106 m (348 ft) |
| Length | 899.5 m (2,951 ft) |
| Elevation at crest | 126.4 m (415 ft) |
| Spillway type | Main: 26 x sluice gates Auxiliary: 16 x sluice gates |
| Spillway capacity | Main: 37,650 m3/s (1,329,597 cu ft/s) Auxiliary: 17,046 m3/s (601,974 cu ft/s) |
| Reservoir | |
| Creates | Supung Lake |
| Total capacity | 14,600,000,000 m3 (11,836,413 acre⋅ft) |
| Active capacity | 7,900,000,000 m3 (6,404,634 acre⋅ft) |
| Inactive capacity | 4,180,000,000 m3 (3,388,781 acre⋅ft) |
| Catchment area | 52,912 km2 (20,429 sq mi) |
| Surface area | 274 km2 (106 sq mi) |
| Normal elevation | 123 m (404 ft) |
| Power Station | |
| Operator(s) | Korea-China Hydroelectric Co |
| Commission date | 1941 |
| Hydraulic head | 77 m (253 ft) |
| Turbines | 6 x 105 MW Francis-type 2 x 67.5 MW Francis-type |
| Installed capacity | 765 MW |
The Sup'ung Dam (traditional Chinese: 水豐水庫; simplified Chinese: 水丰水库; Korean: 수풍댐(水豊댐)), also referred to as the Shuifeng Dam and originally the Suihō Dam, is a gravity dam on the Yalu River between Kuandian Manchu Autonomous County, Liaoning Province in China and Sakju County, North Pyongan Province in North Korea. The dam was constructed by the Japanese between 1937 and 1943 in order to generate electricity and has been repaired and renovated several times throughout the years, mainly due to spillway damage from flooding.
During the Korean War, the dam was bombed by the United Nations Command three separate times in order to disrupt power generation for the North Koreans. At the time of its completion, the dam was the largest in Asia, and power station was third-largest (after Hoover Dam and Wilson Dam) hydroelectric power station in the world. It is still the largest hydroelectric power station on the Yalu (Korean: Amnok) River. Power produced at the dam's main 630 MW power station is evenly shared between China and North Korea.
The dam is featured on the national emblem of North Korea.