Yunfeng Dam

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Yunfeng Dam

View of the reservoir from the Chinese-side of the dam
Location of Yunfeng Dam
Country China/North Korea
Location Ji'an/Chasong
Coordinates 41°22′51″N 126°30′52″E / 41.38083°N 126.51444°E / 41.38083; 126.51444Coordinates: 41°22′51″N 126°30′52″E / 41.38083°N 126.51444°E / 41.38083; 126.51444
Status Operational
Construction began 1959
Opening date 1965
Dam and spillways
Type of dam Concrete gravity
Impounds Yalu River
Length 828 m (2,717 ft)
Height 113.75 m (373 ft)
Elevation at crest 321.75 m (1,056 ft)
Spillway type Overflow, 21 gates
Spillway capacity 21,900 m3/s (773,391 cu ft/s)
Reservoir
Total capacity 3,895,000,000 m3 (3,157,728 acre·ft)
Active capacity 2,662,000,000 m3 (2,158,119 acre·ft)
Catchment area 17,572 km2 (6,785 sq mi)
Normal elevation 318.75 m (1,046 ft)
Power station
Commission date 1965-67
Turbines 4 x 100 MW Francis-type
Installed capacity 400 MW

The 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 Manpo 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

References

  1. ↑ "Yunfeng Hydropower" (in Chinese). Neidri. Retrieved 5 September 2011. 
  2. ↑ "Yunfeng Hydropower" (in Chinese). Zhejiang College of Water Conservancy and Hydropower. 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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