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Coordinates: 32°13′56.56″N 50°20′32.37″E / 32.2323778°N 50.3423250°E

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Kouhrang 3 Dam
Location of Kouhrang 3 Dam in Iran
Country	Iran
Coordinates	32°13′56.56″N 50°20′32.37″E / 32.2323778°N 50.3423250°E / 32.2323778; 50.3423250
Status	Under construction
Construction began	2011
Dam and spillways
Type of dam	Arch
Impounds	Kouhrang River
Height	135 m (443 ft)
Length	235 m (771 ft)
Width (crest)	5 m (16 ft)
Width (base)	23 m (75 ft)
Reservoir
Total capacity	650,000,000 m³ (526,964 acre⋅ft)^[1]

The Kouhrang 3 Dam (سد کوهرنگ ۳, also known as Birgan dam بیرگان) is an arch dam currently under construction on the Kouhrang River in Chaharmahal and Bakhtiari Province, Iran. It is located about 12 km (7.5 mi) northwest of Dashtak. The purpose of the dam is water supply and river regulation. Upstream of the dam will be the intake for the 23 km (14 mi) Kouhrang 3 Tunnel which will transfer water northeast to the Zayandeh River for use in major cities like Isfahan.^[2]^[3] Sabir Co. was awarded the contract for the dam's construction in February 2011 and construction began that same year.^[4] The diversion tunnels for the dam were completed in March 2013. The project was scheduled for completed in 2015.^[5]

As of July 2017, the project was not yet complete, though the tunnel was considered 97% finished, and newly allocated funds were expected to allow imminent completion.^[6] It is claimed that construction of the tunnel in difficult geological conditions has led to drying up of springs, and the estimated transfer volume has been reduced from 270-300 to 40-130 million cubic metres per year. ^[7]

References

^ "Dam Kouhrang 3" (in Persian). Sabir. Archived from the original on 26 February 2014. Retrieved 29 January 2014.
^ "Kouhrang III Water Transmission Tunnel". Tablieh. Archived from the original on 4 February 2014. Retrieved 29 January 2014.
^ "Transfer of Koohrang Valley water to Zayandehrood Valley (Koohrang 3 Tunnel)" (in Persian). Iran Ministry of Energy. Retrieved 27 January 2014.
^ "Signing a contract worth more than 830 billion riyals dam Koohrang 3" (in Persian). Saba. 16 February 2011. Retrieved 29 January 2014.
^ "River diversion dam operations Byrgan for Koohrang 3 was" (in Persian). WNN Iran. 17 March 2013. Retrieved 29 January 2014.
^ "Completion of the dam and tunnel of Koohrang in the twelfth". Isfahan Metropolis News Agency (in Persian). 3 July 2017.
^ "زخم انتقال آب بر تن رودخانه بیرگان/زاینده‌رود از کارون سیرنمی‌شود". خبرگزاری مهر | اخبار ایران و جهان | Mehr News Agency (in Persian). 17 July 2017.

v t e Dams and reservoirs in Iran
Major reservoirs and dams in Iran	Alavian Dam Amir Kabir Dam Azad Dam Bust-e gez Dam Daryan Dam Dez Dam Doroodzan Dam Ashavan Dam Garan Dam Gavoshan Dam Giz Galasi Dam Cheragh Veys Dam Iran–Turkmenistan Friendship Dam Jiroft dam Shahid Abbaspour Dam Masjed Soleyman Dam Karun-3 Dam Karun-4 Dam Karkheh Dam Khoda Afarin Dam Kouhrang 1 Dam Kouhrang 2 Dam Lar Dam Latyan Dam Mahabad Dam Mamloo Dam Marun Dam Rudbar Lorestan Dam Sardasht Dam Sefidrud Dam Seimare Dam Shahid Kazemi Dam Shahid Rajaee Dam Shahid Talebi Dam Shamo Dam Siah Bishe Pumped Storage Power Plant Silveh Dam Sivand Dam Sumbar Dam Tarik Dam Upper Gotvand Dam Zayanderud Dam
Under construction	Aras Watershed Dam Bakhtiari Dam Khersan-3 Dam Kouhrang 3 Dam
Ancient dams	Band-e Kaisar Boz Dam Jaber Dam Jawid Dam Kebar Dam Kurit Dam Shahi Dam Great Hagi Jaffar Dam
Also See: Dams and reservoirs in Iran

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