Longtan Dam

Longtan Dam
Longtan Dam is located in China
Longtan Dam
Location of Longtan Dam in China
Official name龙滩大坝
CountryChina
LocationTian'e County, Guangxi
Coordinates25°01′38″N 107°02′51″E / 25.02722°N 107.04750°E / 25.02722; 107.04750
StatusIn use
Construction began2001
Opening date2009
Construction costUS$4.2 billion
Owner(s)Longtan Hydropower Development Co., Ltd.
Dam and spillways
Type of damGravity
ImpoundsHongshui River
Height216.2 m (709 ft)
Length849 m (2,785 ft)
Dam volume7,670,000 m3 (10,031,981 cu yd)
Spillway typeService, controlled
Spillway capacity27,134 m3/s (958,228 cu ft/s) (max flood)
Reservoir
CreatesLongtan Reservoir
Total capacity27,270,000,000 m3 (22,108,149 acre⋅ft)
Active capacity20,530,000,000 m3 (16,643,942 acre⋅ft)
Catchment area98,500 km2 (38,031 sq mi)
Normal elevation400 m (1,312 ft)
Power Station
Commission date2007-2009
Hydraulic head179 m (587 ft) (max.)
Turbines9 × 714 MW Francis-type
Installed capacity6,426 MW
Annual generation18,700 GWh (estimate)

Longtan Dam (simplified Chinese: 龙滩大坝; traditional Chinese: 龍灘大壩; pinyin: Lóngtān Dàbà) is a large roller-compacted concrete (RCC) gravity dam on the Hongshui River in Tian'e County of the Guangxi Zhuang Autonomous Region, China, a tributary of the Xi River and the Pearl River.[1][2][3][4][5][6] The dam is 216.2 metres (709.3 ft) high and 849 m (2,785 ft) long; it is the tallest of its type in the world.[7] The dam is intended for hydroelectric power production, flood control and navigation. The dam contains seven surface spillways, two bottom outlets and an underground power station. The Longtan ship lift, part of the dam complex, will be the tallest ship lift system in the world.[8]

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