Unbong Dam

Dam on the Chinese-North Korean Border
Dam in Ji'an/Chasŏng
41°22′51″N 126°30′52″E / 41.38083°N 126.51444°E / 41.38083; 126.51444StatusOperationalConstruction began1959Opening date1965Dam and spillwaysType of damConcrete gravityImpoundsYalu RiverHeight113.75 m (373 ft)Length828 m (2,717 ft)Elevation at crest321.75 m (1,056 ft)Spillway typeOverflow, 21 gatesSpillway capacity21,900 m3/s (773,391 cu ft/s)ReservoirTotal capacity3,895,000,000 m3 (3,157,728 acre⋅ft)Active capacity2,662,000,000 m3 (2,158,119 acre⋅ft)Catchment area17,572 km2 (6,785 sq mi)Normal elevation318.75 m (1,046 ft)Power StationCommission date1965-67Hydraulic head89 m (292 ft) (design)Turbines4 x 100 MW Francis-typeInstalled capacity400 MW

The Unbong Dam, or Yunfeng Dam, is a concrete gravity dam on the Yalu River which borders China and North Korea. It is located 33 km (21 mi) northeast of Ji'an in Jilin Province, China and Chasŏng in Chagang Province, North Korea. The primary purpose of the dam is hydroelectric power generation and it supports a 400 MW power station. Construction of the dam had initially began in August 1942 but was halted in 1945 after the surrender of Japan ending World War II.[1] In October 1959, construction on the dam recommenced and in September 1965, the first of the four 100 MW Francis turbine-generators was operational. The last generator was operational on 4 April 1967. The 113.75 m (373 ft) tall dam creates a reservoir with a storage capacity of 3,895,000,000 m3 (3,157,728 acre⋅ft). The dam's spillway is an overflow type with 21 floodgates and has a maximum discharge of 21,900 m3/s (773,391 cu ft/s). The dam is located before a bend in the river and its power station is located on the other side of a ridge that meets the dam's right abutment. Water is delivered to the power station via two tunnels, 775 m (2,543 ft) and 759 m (2,490 ft) long. Generators 1 and 3 deliver power to China while 2 and 4 deliver to North Korea.[2][3]

See also

  • flagChina portal
  • flagNorth Korea portal
  • iconWater portal
  • iconRenewable energy portal

References

  1. ^ "Yunfeng Hydropower" (in Chinese). Neidri. Retrieved 5 September 2011.[dead link]
  2. ^ "Yunfeng Hydropower" (in Chinese). Zhejiang College of Water Conservancy and Hydropower. Archived from the original on 1 August 2014. Retrieved 5 September 2011.
  3. ^ "China's highest Concrete Gravity Dams". Chinese National Committee on Large Dams. Retrieved 5 September 2011.
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