The Kouhrang 3 Dam (سد کوهرنگ ۳, also known as Birgan dam بیرگان) is an

arch dam An arch dam is a concrete dam that is curved upstream in plan. The arch dam is designed so that the force of the water against it, known as hydrostatic pressure, presses against the arch, causing the arch to straighten slightly and strengthen ...

currently under construction on the

Kouhrang River Koohrang (also known as Kouhrang and Kurang) is the name of a river, originating in the Zagros mountains of western Iran, which joins the Beheštābād river () to form the Karun, Iran's largest (by volume) river. A series of tunnels (Kuhrang Tun ...

in Chaharmahal and Bakhtiari Province,

Iran Iran, officially the Islamic Republic of Iran, and also called Persia, is a country located in Western Asia. It is bordered by Iraq and Turkey to the west, by Azerbaijan and Armenia to the northwest, by the Caspian Sea and Turkmeni ...

. It is located about northwest of Dashtak. The purpose of the dam is water supply and river regulation. Upstream of the dam will be the intake for the Kouhrang 3 Tunnel which will transfer water northeast to the

Zayandeh River Zayanderud ( fa, Zāyanderud, script=Latn, from "fertile" or "life giver", and "river"), also spelled as ''Zayandeh-Rood'' or ''Zayanderood'', is the largest river of the Iranian Plateau in central Iran. Geography The Zayandeh starts in t ...

for use in major cities like

Isfahan Isfahan ( fa, اصفهان, Esfahân ), from its Achaemenid empire, ancient designation ''Aspadana'' and, later, ''Spahan'' in Sassanian Empire, middle Persian, rendered in English as ''Ispahan'', is a major city in the Greater Isfahan Regio ...

. Sabir Co. was awarded the contract for the dam's construction in February 2011 and construction began that same year. The diversion tunnels for the dam were completed in March 2013. The project was scheduled for completed in 2015. 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. 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.

References

{{Dams and reservoirs in Iran Dams in Chaharmahal and Bakhtiari Province Dams under construction Arch dams Interbasin transfer Kuhrang County

See also

References