Technical Information

Body specifications

Item	Quantity
Dam type	Double arc concrete
Height from foundation	205 m
Crest length	462 m
Crest width	5.5 m
Foundation width	29.5 m
Total volume of the body	1.3 million m3
Total volume of concrete placement	1.3 million m3

Water sealing specifications

Item

Quantity

Sealing method Grouting curtain

Total length of grouting for sealing curtain 436.5 km

Total length of grouting tunnels 2423 m

Depth of grouting curtain 100 m

Reservoir specifications

Item	Quantity
Total volume of reservoir	3000 million m3
Area of reservoir	48 km2
Length of dam lake	60 km
Width of dam lake	3000 to 2000 m
Normal level	+845 masl

Diversion system

Item	Quantity
Numbers of diversion tunnels	2
Length of diversion tunnels	613 and 536 m
Tunnel diameter after lining	13 m
Total excavation volume	229 000 m3
Cross section	U shape and circular
Type of lining	Concrete
Tunnel excavation diameter	15 m
Discharge capacity	3250 m3/s
Type and height volume of upstream cofferdam	Rock-fill, 35 m and 3.5 million m3

Instrumentation

In Karun 3 Project different types of instrumentations have been used in different structures. Some of them are installed at the time of construction including thermocouple, thermometer, and inclinometers of dam body as well as extensometer and pressure-meters of power house. Other instrumentations are installed in different stages of progress considering the pre-requisites of water filling. In the course of water filling these instrumentations are read on a daily basis.
The said instrumentations are purchased from Swiss Company of Hagenburger. They all have high quality and at the time being all instrumentations installed in dam body are very well monitoring the behaviors of body, abutments and grouting curtain.

Spillway

In Karun 3 Project three types of spillways and one compensatory outlet are considered whose specifications are as follows:

1-Service Spillway

Item	Quantity
Type of spillway	Gated
Numbers of intakes	2
Location	Right abutment
Type of gates	2 Radial and 2 stop-log gates
Numbers of gates	4
Length of chute	94 and 57 m
Width of chute	19.5 and 22.5 m
Discharge capacity	8710 m3/s
Diameter of gates	15 by 17.34 m
Concrete placement volume	50 000 m3
Length of stilling basin	400 m
Width of stilling basin	35 to 72 m, average 56 m

2-Auxilliary Spillway

Item	Quantity
Type of spillway	Free
Location	On dam body
Length of crest	54 m
Intake shape	OG
Maximum height of water	5.6 m
Discharge capacity	1500 m3/s

3-Emergency Spillway

Item	Quantity
Type of spillway	Gated
Location	Half of the height of dam
Numbers of intakes	2
Type of gates	2 radial and 2 stop-log
Numbers of gates	4
Elevation of gates axis	760 m
Discharge capacity	2800 m3/s

4-Compensatory outlet

Item	Quantity
Numbers of outlets	2
Approximate length	32 m
Diameter	2.2 m
Type of lining	Metal
Types of gates	Ros and emergency gates
Types of valves	Valve with fixed cone
Axis elevation	730 masl
Maximum discharge capacity	250 masl

Quarries and their specifications

Quarries of Karun 3 Project includes the materials taken from excavations of abutments, dam foundation, stilling basin and A& B quarries in Dehriz, Tangghaf, Rokat, Bajul, and Shalu quarries in 7 to 15 km distance of Karun River, upstream of dam.

General specifications of powerhouse

Item		Quantity
Type of powerhouse		Underground
Location		500 m down of right abutment
Capacity		2280 MW
Average annual generation		4172 million kw/h
Turbine type		Francis with vertical axis
Operation level	Minimum critical	+800
	Normal	+845
	Maximum	+850

Specifications of powerhouse equipments

Item	Quantity
Numbers of turbines	8 units
Power of each turbine	250 MW
Maximum output	94%
Height of turbine design	161 m
Turbine manufacturer	Harbin of China
Numbers of transformers	8 units
Nominal power of each transformer	263 MVA
Nominal voltage of each transformer	187.5 KV
Rotation speed of generator	187.5 rotations/minute
Generator manufacturer	Elin of Austria
Transformer type	Synchronic with vertical axis
Design discharge of each unit	172 m3/s

Specifications of powerhouse building

1-Powerhouse cavern:

Length	Width	Height
250 m	25 m	48 m
Total volume of excavation	227 000 m3
Total volume of concrete placement	676 000 m3

2-Transformer cavern:

Length	Width	Height
234 m	21 m	27.8 m
Total volume of excavation	175 300 m3
Total volume of concrete placement	48314 m3

Specifications of powerhouse outlet tunnels

In this regard no data exists.

Specifications of powerhouse waterways

In this regard no data exists.

Technical specifications of post and switchyard

Specifications of switchyard and 400 kv transfer lines
Post voltage	400 kv
Arrangement type	Double with 1.5 key arrangement
Numbers of B	4 from power house direction and 5 outlet feeders
Water transfer tunnels
Length of water transfer tunnel	551.5 m
Diameter of intake transfer tunnel	12.6 m
Diameter of outlet transfer tunnel	14
Type of lining	concrete
Numbers of intake penstocks	8
Numbers of outlet penstock	8
Length of each penstock	64.75 m
Average diameters of penstocks	5.32 m

Specifications of tunnels

In this regard no data exists.

Intake structures

Item	Quantity
Numbers of intake	3
Maximum design discharge	each intake 750 m3/s
Design head	86 m
Numbers of gates	24 for each intake
Type	Stop-loge
Gate of intake structure	Stop-log
Width of gate	9.5 m
Height of gate	33.6 m

Outlet structures

Item	Quantity
Numbers of intake	2
Design head	25.22 m
Numbers of gates	10 for each intake
Type	Stop-loge
Width of gate	13.75 m
Height of gate	15.887

Access roads and bridges

1- Technical specifications of access roads

Name of the road	Average width (m)	Length (km)
Main access road of the site	10	33

2- Technical specifications of the bridges

Name of the bridge	Width (m)	Length (m)	Type of structure
Permanent concrete bridge	12	115	Pre-stressed concrete box

3- External access roads

Due to water filling of Kaun 3 dam approximately 7300 m of Ahwaz-Sharekord road submerged. Therefore substitute road of Karun 3 was constructed on a level higher than the maximum level of Dam Lake. This road includes two concrete arc bridges and four tunnels with the following specifications:

Name of the road	Average width (m)	Length (km)
Substitute road of Karun 3	12	7.2

Name of the bridge

Width (m)

Length (m)

Type of structure

First bridge

11.8

336

Steel

Second bridge

11.8

214

Steel

Complementary operations

• Building Karun 3 residential complex with an area of about 25000 km2, including 20 residential apartments, six four-story buildings with 54 apartments in Izeh Town.
• Complementary buildings of the Project including six 1-3 bedroom apartments at site.
• Building Karun 3 sport complex.
• Building Karun 3 recreational and exhibition complex including:

1. Permanent exhibition
2. Mosque
3. Restaurant and super-market
4. Green space and parking space