The Kurit Dam is a masonry

Masonry

Masonry is the building of structures from individual units laid in and bound together by mortar; the term masonry can also refer to the units themselves. The common materials of masonry construction are brick, stone, marble, granite, travertine, limestone; concrete block, glass block, stucco, and...

 arch dam

Arch dam

An arch dam is a type of dam that is curved and commonly built with concrete. The arch dam is a structure that is designed to curve upstream so that the force of the water against it, known as hydrostatic pressure, presses against the arch, compressing and strengthening the structure as it pushes...

 located 34 km southeast of Tabas

Tabas

Tabas is a city in and capital of Tabas County, Yazd Province, Iran. At the 2006 census, its population was 30,681, in 7,962 families.Tabas is located in central Iran, 950 kilometers southeast of Tehran, in Yazd Province. Formerly it was part of the Khorasan province. It is a desert city with...

, Iran

Iran

Iran , officially the Islamic Republic of Iran , is a country in Southern and Western Asia. The name "Iran" has been in use natively since the Sassanian era and came into use internationally in 1935, before which the country was known to the Western world as Persia...

 near the village of Kurit. The dam is an early arch dam constructed by the Mongolians around 1350 AD. The dam was originally 60m tall but 4m of height was added in 1850. The dam was constructed in a very narrow gorge and was the tallest in the world up until the early 20th century. The dam also contained a sophisticated water outlet system

Outlet works

A set of outlet works is a device used to release and regulate water flow from a dam. Such devices usually consist of one or more pipes or tunnels through the embankment of the dam, directing water usually under high pressure to the river downstream...

 for its time. Currently, the dam does not impound a reservoir

Reservoir

A reservoir , artificial lake or dam is used to store water.Reservoirs may be created in river valleys by the construction of a dam or may be built by excavation in the ground or by conventional construction techniques such as brickwork or cast concrete.The term reservoir may also be used to...

 and a large segment of its lower downstream face has fallen off. Behind the dam, where the reservoir existed, is now full of silt

Silt

Silt is granular material of a size somewhere between sand and clay whose mineral origin is quartz and feldspar. Silt may occur as a soil or as suspended sediment in a surface water body...

with the exception of directly behind the upstream face which has been excavated.