Sefidrud Dam

Sefidrud Dam (originally named Shahbanu Farah Dam and also known as the Manjil Dam) (Persian: سد سفیدرود) is a buttress dam[2] on the Sefīd-Rūd in the Alborz mountain range, located near Manjil in Gilan Province, northern Iran.

A view of dam from downstream
Location of in Iran
Location	Manjil, Iran
Coordinates	36°45′31.27″N 49°23′16.03″E
Purpose	Power, Irrigation
Status	Operational
Construction began	1956
Opening date	1962
Owner(s)	Regional Water Company of Gilan
Dam and spillways
Type of dam	Buttress
Impounds	Sefīd-Rūd and Shahrud (river)
Height	106 m (348 ft)
Length	425 m (1,394 ft)
Width (crest)	8 m (26 ft)
Width (base)	106 m (348 ft)
Dam volume	1,050,000,000 m3 (851,249 acre⋅ft)
Spillway type	Bell-mouth spillway
Reservoir
Total capacity	1,765,000,000 m3 (1,430,909 acre⋅ft)
Active capacity	1,112,000,000 m3 (901,513 acre⋅ft)
Inactive capacity	653,000,000 m3 (529,396 acre⋅ft)
Catchment area	56200 km2
Surface area	46.16 km2 (17.82 sq mi)[1]
Power Station
Installed capacity	87 MW
Website https://glrw.ir/st/67

It was constructed to store water for Irrigation and produce hydroelectric power. The power station has an installed capacity of 87.5 MW.[3] It is 106 m (348 ft) tall and forms a reservoir with a capacity of 1.82 km³ (1,475,498 acre⋅ft). Its structure contains 26 monoliths.[4]

The Tarik Dam is located 35 km (22 mi) downstream and diverts releases from the Sefidrud Dam for irrigation.

The extremely destructive 1990 Manjil–Rudbar earthquake occurred near the dam and caused portions of its concrete to crack. Repairs and mitigation efforts were undertaken in 1991.[5][6]