|THC Main Dam|
|Official name||Tuyamuyun Hydroengineering Complex|
|Location||Urgench, Xazorasp District, Xorazm Region/Dasoguz, Lebap Region|
|Dam and spillways|
|Type of dam||Gravity|
|Impounds||Amu Darya River|
|Height||25 m (82 ft)|
|Length||141 m (463 ft)|
|Total capacity||2,300,000,000 m3 (1,900,000 acre⋅ft)|
|Surface area||303 km2 (117 sq mi)|
|Maximum length||102 km (63 mi)|
|Normal elevation||130 m (430 ft)|
|Turbines||6 x 25 MW|
|Installed capacity||150 MW|
|Annual generation||571 GWh|
The Tuyamuyun Hydro Complex (THC) is a system of four interconnected reservoirs and a series of canals on the lower Amu Darya River, bordering Uzbekistan and Turkmenistan. Its primary purpose is to provide water for irrigation in Xorazm, Karakalpakstan and Daşoguz regions of Uzbekistan, Turkmenistan and as far north as Kazakhstan. 74 km (46 mi) southeast of Urgench in Xorazm Region, Uzbekistan and about 2 km (1.2 mi) north of Gazojak in Lebap Region, Turkmenistan. It was constructed between 1969 and 1983. Aside from irrigation, the complex also provides water for industrial and municipal uses. A 150 MW power station on the main dam contains six 25 MW hydroelectric turbine-generators.The complex is located about
The main dam (THC Main Dam) is located on the Amu Darya, straddling the border of Uzbekistan and Turkmenistan. It is the center-piece of the complex. The main dam is a 141 m (463 ft) long and 25 m (82 ft) high gravity dam. It creates the Channel Reservoir which has a storage capacity of about 2,300,000,000 m3 (1,900,000 acre⋅ft) and length of 102 km (63 mi). Water from the Channel Reservoir can be fed into the adjacent Kaparas and Sultansanjar Reservoirs for later use. The Sultansanjar Reservoir is connected via a canal to the Koshbulak Reservoir which lies just east. When first completed, all four reservoirs had a capacity of about 7,800,000,000 m3 (6,300,000 acre⋅ft) but due to silt build-up, this had been reduced to about 6,700,000,000 m3 (5,400,000 acre⋅ft) by 2001. A system of canals off the main dam supply a network of irrigation canals to the various regions for irrigation.
The Amu Darya is a major river in Central Asia and Afghanistan. Rising in the Pamir Mountains, north of the Hindu Kush, the Amu Darya is formed by the confluence of the Vakhsh and Panj rivers, in the Tigrovaya Balka Nature Reserve on the border between Afghanistan and Tajikistan, and flows from there north-westwards into the southern remnants of the Aral Sea. In its upper course, the river forms part of Afghanistan's northern border with Tajikistan, Uzbekistan, and Turkmenistan. In ancient history, the river was regarded as the boundary of Greater Iran with "Turan", which roughly corresponded to present-day Central Asia. The Amu Darya has a flow of about 70 cubic kilometres per year on average.
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Uzbekistan is a country of Central Asia, located north of Turkmenistan and Afghanistan. With an area of 447,000 square kilometers, Uzbekistan stretches 1,425 km (885 mi) from west to east and 930 km (580 mi) from north to south. It borders Turkmenistan to the southwest, Kazakhstan to the north, and Tajikistan and Kyrgyzstan to the south and east. Uzbekistan also has four small exclaves in Turkmenistan.
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The Andijan Dam is a buttress dam on the river Kara Darya near Andijan in Andijan Region, Uzbekistan. Its reservoir covers 57.28 km2 (22.12 sq mi) and stretches into neighboring Osh Region, Kyrgyzstan. The dam serves several purposes to include irrigation in the Fergana Valley and hydroelectric power production. Water released from the dam can enter a canal on either side of the river downstream. The dam has two power stations located at its base, Andijan 1 and Andijan 2. The former contains four 35 MW turbine-generators and the latter contains two 25 MW Francis turbine-generators for a total installed capacity of 190 MW. Construction on the dam began in 1969 and the generators in Andijan 1 were commissioned between 1974 and 1984. Construction on Andijan 2 began in 2007 and it was commissioned on 2 September 2010. It cost US$28.5 million of which US$15.93 million was supplied by the Exim Bank of China.
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