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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 Rock-fill with clay core
Height from foundation 180 m
Crest length 760 m
Crest width 15 m
Foundation width 1075 m
Total volume of the body 28.5 million m3
Sealing grouting width 450 000 m
Area of sealing wall 42 000 m2
Foundation grouting width 250 000 m
Grouting and access gallery length 3750 m
Volume of soil and cement 500 000 m3
Body specifications
Reservoir specifications
Item
Quantity
Total volume of reservoir 4.5 billion m3
Area of reservoir 96.5 km2 at +234 masl
Length of dam lake 90 km at +234 masl
Width of dam lake 1.1 km
Normal level 230 masl
Reservoir specifications
Diversion system
Item
Quantity
Location Left bank of the river
Numbers of diversion tunnels 2

Length of diversion tunnels

Right: 1453 m
Center: 1514 m
Left: 1563 m

Tunnel diameter after lining 9.5 m
Open-cut excavation volume 2.2 million m3
Underground excavation volume 550 000 m3
Cross section U shape
Type of lining Reinforced concrete
Tunnel excavation diameter 11 m
Discharge capacity 4200 m3/s
Type, height and volume of upstream cofferdam Rock-fill with clay core, 82 m and 3.5 million m3
Type, height and volume of upstream cofferdam Rock-fill with clay core, 23.5 m and 400 000 m3
Diversion system
Instrumentation
Dam body instrumentation
 
Piezometer in foundation
Hydraulic piezometer of body
Pore water pressure cell of foundation
Pore water pressure cell of dam body
Instrumentation
Spillway
Item
Quantity
Type of spillway OG gated with water chute
Location Left bank
Type of gates Radial
Numbers of gates 4
OG level +218
Width of spillway 72 m
Discharge capacity 17500 m3/s
Diameter of gates 15 by 17 m
Concrete placement volume 700 000 m3
Excavation volume 19 million m3
Spillway
Quarries and their specifications
Type of material
Location of quarry
Fine-graded material Emamzade Zeid quarry with the distance of 8 km from the site
Drainage material Beneheydar quarry with the distance of 11 km from the site
Fin-graded filter material Kohang quarry with the distance of 57 km from the site
Concrete material Beneheydar, Kohang and Andimeshk quarries
Rip-rap material Manghati and Chenare quarries both with the distance of 110 km from the site
Quarries and their specifications
General specifications of powerhouse
Item
Quantity
Type of powerhouse Surface
Capacity 1000+1000 mw
Average annual generation 4500 GWh
Turbine type Francis with vertical axis
General specifications of powerhouse
Specifications of powerhouse equipments
Item
Quantity
Numbers of turbine 4+4
Power of each turbine 254 MW
Output in nominal condition 94.4 %
Height of turbine design 141 m
Discharge of turbine in nominal condition 193 m3/s
Turbine manufacturer Voith of Austria
Azarab Arak
Numbers of transformers 12+1 (spare) for 4 units
24 for 8 units
Nominal power of each transformer 100 MVA
Nominal second voltage of transformer 400 KV
Numbers and type of generators 4+4 vertical synchronic
Output power of each generator 278 MVA
Nominal voltage of each generator 15.75 KV
Rotation speed of generator 187.5 rotations/minute
Nominal current of generator 10191 A
Generator manufacturer Elin of Austria
Pars Generator
Transformer type OFWF
Basic nominal voltage 15.75 KV
Cooling system water
Specifications of powerhouse equipments
Specifications of powerhouse building
General specifications of building:
(considering development plan)

Length of the building
Width of the building
Height of the building

200m

50m

70m


 
Item
Quantity
Excavation 3 million m3
Reinforcement 22 000 tons
Structural and filling concrete placement 300 000 m3
Heavy metal works 1300 ton
Specifications of powerhouse building
Specifications of powerhouse outlet tunnels
In this regard no data exists.
Specifications of powerhouse outlet tunnels
Specifications of powerhouse waterways
In this regard no data exists.
Specifications of powerhouse waterways
Technical specifications of post and switchyard
   
Type
AIS
Voltage level 400 KV
Numbers of high voltage lines 4+2 (development phase)
Input feeders 4
Technical specifications of post and switchyard
Specifications of tunnels
Water transfer tunnels
 
Item
Quantity
Length of water transfer tunnel 1400 m
Diameter of intake transfer tunnel 11 m
Type of lining 900 m concrete
500 m steel
Numbers of penstocks 2 series for first phase
4 series for second phase
Length of each penstock 500 m
Average diameters of penstocks 7 m
Numbers of surging tanks 2 series for first phase
2 series for second phase
 
 
Depth outlet
 
 
Item
Quantity
Ceiling crane 40 tons
Emergency gate (equipped with hydraulic motor) 1 set
Dimension of gates 3 by 4 m
Service gate (equipped with hydraulic motor) 1 set
Dimension of gates 3 by 4 m
Metal lining 1 set
Weight of metal lining 900 tons
Specifications of tunnels
Intake structures
Hydro mechanical specifications of intake structure
 
Item
Quantity
Numbers of intake 4
Width 11 m
Height 26 m
Water filling level 154
Maximum design discharge 900 m3/s
Design head 90 m
Gate crane 150 tons
Course of gate crane 100 m
Numbers of stop log gates 1 set
Width of the gate 7 m
Height of the gate 12 m
Minimum operation level 190 m
Trash rack type Fixed
Course of trash rack system 7 m
Numbers of wheeled gates 4 sets
Intake structures
Outlet structures
   
Item
Quantity
Gate crane 30 tons
Stop log gate 2 sets
Dimension of gates 9 by 6 m
Outlet structures
Access roads and bridges
1- Technical specifications of access roads
 
Name of the road
Average width (m)
Length (km)
Substitute road of submerged area and Lali-Masjedsoleiman

9

20 000

Access road to chute

9

9000

Access road to dam crest from left bank

11

5000

Access road from regulating dam to construction site

9

10 000

 
 
Technical specifications of the bridges
 
Name of the bridge
Width (m)
Length (m)
Type of structure
Lali big bridge

14.5

480

Gotvand city bridge

11.5

260

Permanent bridge of the site

13

150

 
 
2- Technical specifications of access tunnels
 
Name of the tunnel
Width (m)
Length (m)
Height (m)
Emamzade Zeid tunnel

10

700

7

Access tunnel to spillway excavations

10

360

7

Access tunnel to water transfer tunnels

10

970

7

Access tunnels to grouting galleries

6

4000

5

 
Access roads and bridges
Complementary operations
Lateral buildings:
Construction activities of the client’s office and the residential building of equipment contractor are finished and they are handed over temporarily. Sport complex, supervisors and client’s residential building and VIP is in finishing stage. Parallel to that the civil works of the main site and the structure of feasibility building are about to be finished. In the mean time sewerage system of Emamzade Zeid complex is being installed and all of the buildings of equipment contractors are handed over to Engineering Affairs Dept.
Complementary operations

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