The
Dez Dam is an
arch dam on the
Dez River in the southwestern province of
Khuzestan,
Iran. It is about north of
Andimeshk. It was built between 1959 and 1963 by an Italian consortium and is owned by the Khuzestan Water & Power Authority. The dam is high, making it one of the highest in the country, and has a reservoir capacity of . At the time of construction the Dez Dam was
Iran's biggest development project. The primary purpose of the dam is
hydroelectric power production and
irrigation. It has an associated 520 MW power station and its reservoir helps irrigate up to of farmland. US$42 million of the cost to construct the dam came from the
World Bank.