Shirvan Dam Project

Project Purpose/Layout

The purpose of the dam is to supply water for downstream irrigation consumption. The dam layout consists of a diversion dam, storage dam and tailrace network.

Geographic Location

The dam site is situated about 34 km from city of Shirvan in North Khurasan province (northeast of Iran).

Project History

The phase I studies were carried out by Mahab Ghodss Consulting Engineering Company and Stucky Company in 1970. Following the Islamic Revolution of Iran, phase II studies and construction supervision were conducted by Mahab Ghodss Consulting Engineering Company. The main contractor was National Construction Company. The construction period started in 1995 and finished in 2005.

Specific Characteristics of Project

The fault lying under the dam site was found active during the construction period by the new tests. A particular design was produced with a view to stand the activity of the faults.

Technical Specifications of Project

Dam typeConcrete double curvature arch dam
Dam height above foundation (m)83
Dam crest length (m)325
Dam crest width (m)6
Dam body volume (m3)190 x 103
Total reservoir volume (m3)92 x 106
Active reservoir volume (m3)77.2x 106
Mean annual inflow (m3/s)1.4
Type of spillway Morning glory spillway
Flood discharge capacity (m3/s)1020
Powerhouse type-
Number of units-
Design head (m)-
Installation capacity (MW)-
Mean annual generation (GWH)-
Diversion System
Type of diversion systemTunnel
Number of diversion tunnels1
Length of diversion tunnel (m)167
Diameter of diversion tunnel (m)8
Discharge capacity of diversion system (m3/s) 187
Power Tunnel
Length of power tunnel (m)-
Diameter of power tunnel (m)-
Water Conveyance Tunnel
Length of water supply tunnel (m)-
Diameter of water supply tunnel (m)-
Bottom Outlet
Discharge capacity of bottom outlet (m3/s)33
Discharge capacity of irrigation intake (m3/s)6.2
Discharge capacity of drinking water intake (m3/s)-
Discharge capacity of power intake (m3/s)-
Relocation Roads & Access Roads
Length of relocation roads (km)12
Length of access roads (km) 15