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In this section the technical information of the project is presented in form of the following items:
Body specifications
 
Item
Quantity
Dam type Concrete double arc
Height from foundation 230 m
Crest length 440 m
Crest width 7 m
Foundation width 37 to 52 m
Total volume of the body 1.65 million m3
Total volume of concrete placement 1.65 million m3
 
Body specifications
Reservoir specifications
Item
Quantity
Total volume of reservoir 2190 million m3
Area of reservoir 29 km2
Length of dam lake
Width of dam lake 41 km at Arvand River
28 km at Bazaft River
Normal level +1025 masl
Reservoir specifications
Diversion system
Item
Quantity
Numbers of diversion tunnels 2
Length of diversion tunnels 655 – 700 m
Tunnel diameter after lining 9.5 m
Open-cut excavation volume 5 million m3
Underground excavation volume 450 000 m3
Cross section Circular and U shape
Type of lining Concrete
Tunnel excavation diameter 9.5 m
Discharge capacity 2260 m3/s
Type, height and volume of upstream cofferdam Staircase, 82 m and
110 000 m3
Type, height and volume of upstream cofferdam Rock-fill, 5 m and
55 000 m3
Diversion system
Instrumentation
For the moment there is no data available in this regard.
Instrumentation
Spillway
Item
Quantity
Type of spillway Gated
Location Right abutment
Type of gates Radial
Numbers of gates 3
Discharge capacity 6150 m3/s
Spillway
Quarries and their specifications
For the moment there is no data available in this regard.
Quarries and their specifications
General specifications of powerhouse
Item
Quantity
Type of powerhouse Surface
Capacity 1000 mw
Average annual generation 2107 GWh
Turbine type Francis with vertical axis
General specifications of powerhouse
Specifications of powerhouse equipments
Item
Quantity
Numbers of turbine 4
Power of each turbine 255 MW
Output in nominal condition 95.7 %
Height of turbine design 161.5 m
Discharge of turbine in nominal condition 171 m3/s
Turbine manufacturer Ziemens Foith
Numbers of transformers 12+1 (spare)
Nominal power of each transformer 100 MVA
Nominal second voltage of transformer 410 KV
Numbers and type of generators 4 synchronic
Output power of each generator 263 MVA
Nominal voltage of each generator 15.75 KV
Rotation speed of generator 187.5 rotations/minute
Nominal current of generator 12500 A
Generator manufacturer Alestom
Transformer type Mono-Phase
Basic nominal voltage 15.5 KV
Cooling system OFWF
Specifications of powerhouse equipments
Specifications of powerhouse building
 
Length
Width
Height

121 m

55 m

65 m


 
 
Item
Quantity

Excavation

1 888 000 m3

Concrete placement

150 000 m3

Specifications of powerhouse building
Specifications of powerhouse outlet tunnels
In this regard no data exists.
Specifications of powerhouse outlet tunnels
Specifications of powerhouse waterways
Item
Quantity
Number of tunnels 4
Total length of tunnels 1401 m
Total volume of excavation 124000 m
Total volume of concrete placement of tunnels 37000 m
Total volume of concrete placement behind the metal lining 18000 m3
Total length of metal lining 840 m
Length of vertical shafts 212 m
Specifications of powerhouse waterways
Technical specifications of post and switchyard
Type GIS
Voltage level 400 KV
Technical specifications of post and switchyard
Specifications of tunnels
Item
Quantity
Quantity
Type of spillway
Free Gated
Numbers 5 3 Radial Gates
Level 1028+1026 masl 1010 masl
Length 56 m 31.5 m
Location On dam crest Right abutment
 
Bottom Outlet
 
Item
Quantity
Numbers 2
Total discharge capacity of each 500 m3/s
Installation level 900 masl
Type of lining metal
Specifications of tunnels
Intake structures
No data exists in this regard.
Intake structures
Outlet structures
No data exists in this regard.
Outlet structures
Access roads and bridges
 
Type of the road Main Numbers of bridges 4
Total length 11 m Numbers of tunnels 7
Asphalt length 7.3 m Minimum radius of arc 100 & 140 m
length 21.5 km Maximum level from sea 1120 m
 
Access roads and bridges
Complementary operations
No data exists in this regard.
Complementary operations

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