Technical Information

Body specifications

Item	Quantity
Dam type	Double-Curvature Concrete Arc
Height from foundation	195 m
Crest length	470 m
Crest width	6 m
Foundation width	40 m
Total volume of the body	1,100,000 m3

Reservoir specifications

Item	Quantity
Total volume of reservoir	1158.4 million m3
Area of reservoir	24.5 km2
Length of dam lake	40 km
Average width of dam lake	400 m
Normal level	1432 masl

Diversion system

Item	Quantity
Numbers of diversion tunnels	1
Length of diversion tunnel	768 m
Tunnel diameter	13.9 m
Open-cut excavation volume	130000 m3
Underground excavation volume	115000 m3
Cross section	Circular
Type of lining	Concrete
Tunnel diameter after lining	12.5 m
Discharge capacity	1893 m3/s
Type, height and volume of upstream cofferdam	CSG, 44 m and 104000 m3
Type, height and volume of downstream cofferdam	Rock-fill, 10 m and 35000 m3

Instrumentation

List of monitoring equipment		QUANTITIES
Symbols	EXPLANATION	LEFT	CENTER	RIGHT	TOTAL
PS	Anchor point for direct pendulum	2	2	2	6
PB	Pendulum BOB	2	2	2	6
PF	Inverted pendulum float	2	1	2	5
PA	Inverted pendulum Anchorage	2	1	2	5
PMS	Pendulum measurement station	10	10	10	30
JID	Directional joint meter	10	12	10	32
TC	Theodulite console in gallery	20	10	20	50
CT	Concrete temperature thermometer (Total – number of embedded instruments)	15	20	15	50
WT	Water temperature thermometer	3	5	3	11
AT	Air temperature thermometer	3	5	3	11
CL	Clinometers	3	6	3	12
SMR	Strong motion recorder	2	3	2	7
EX	Extensometer	6	4	6	16
PM	Vibrating Wire Piezometer	9	6	9	24
RW	Reservoir water level indicator	-	1	-	1
DM	Seepage measurement Station (V notch)	2	3	2	7
TB	Terminal Box for Thermometer Cables	1	1	1	3
OP	Geodetic Observation target	6	-	5	12
CP	Geodetic control point	10	4	10	24
TA	Target on downstream face of dam	8	10	8	26
UG	Uplift Gauge with pressure-meter	-	5	-	5
SP	Stand-pipe piezometer (casagrande)	30	-	30	60
ADAS	Automatic Data Acuisition System	-	-	-	1
MS	Meteorological Station	-	-	-	1

Spillway

Item	Quantity
Type of spillway	Free
Discharge capacity	6300 m3/s

Quarries and their specifications

	Fine-graded material	Coarse material	Rock quarry
Location	Near Sardasht Village	Upstream waterway of Sardasht Village	Dam excavations and lateral structures
Transportation distant	20 km	27 km	2 km from deposit area
Volume	600000 m3	600000 m3	1600000 m3
Type	Layered clay	Layered sand-clay	Lime and Marne-lime

General specifications of powerhouse

Item	Quantity
Type of powerhouse	Surface hydroelectric
Capacity	400 mw
Average annual generation	1121 GWh
Turbine type	Vertical Francis

Specifications of powerhouse equipments

Item	Quantity
Numbers of turbine	4 units
Power of each turbine	100 MW
Output in nominal condition	94.5 %
Height of turbine design	177 m
Discharge of turbine in nominal condition	80 m3/s
Numbers of transformers	4 units
Nominal power of each transformer	128 MVA
Nominal second voltage of transformer	410 KV
Numbers and type of generators	Vertical synchronic
Output power of each generator	118 MVA
Nominal voltage of each generator	13.7 KV
Rotation speed of generator	300 rotations/minute
Nominal current of generator	4000 A
Basic nominal voltage	13.7 KV
Cooling system	Water and air

Specifications of powerhouse building

Length of the building	Width of the building	Height of the building
75 m	24 m	48 m

Item	Quantity
Excavation	600000 m3
Reinforcement	1670 tons
Structural and filling concrete placement	44760 m3

Specifications of powerhouse outlet tunnels

Item	Quantity
Gradient of outlet channel be(vertical:horizontal)	2:1
Gradient of outlet channel banks (vertical:horizontal)	1:3
Length of channel (meter)	29
Water level under condition of both units operation	1266.5
Water level under condition of one units operation	1264.5

Specifications of powerhouse waterways

Water way Tunnel No.1

Location	Beginning level (masl)	Ending level (masl)	Length (meter)	Internal diameter (meter)	Type of lining
High level tunnel	1376.2	1344.1	269.4	6.5	Concrete
Connection joint to vertical shaft	1344.1	1314.3	43.7	6.5	Concrete
Vertical shaft	1314.3	1298.8	15.5	6.5	Concrete
Connection joint to low level tunnel	1298.8	1268.9	44.1	6.5	Concrete
Low level tunnel	1268.9	1254.8	142.2	5.2	Steel

Water way Tunnel No.2

Location	Beginning level (masl)	Ending level (masl)	Length (meter)	Internal diameter (meter)	Type of lining
High level tunnel	1376.2	1340.5	299.3	6.5	Concrete
Connection joint to vertical shaft	1340.5	1310.8	43.7	6.5	Concrete
Vertical shaft	1310.8	1300.5	10.3	6.5	Concrete
Connection joint to low level tunnel	1300.5	1270.6	44.1	6.5	Concrete
Low level tunnel	1270.6	1254.8	159.1	5.2	Steel

Technical specifications of post and switchyard

Type	Normal on-the-ground
Voltage level	410 KV
Numbers of high voltage lines	2

Specifications of tunnels

Bottom outlet
Item	Quantity
Numbers	2
Level of outlet no.1	1325 masl
Dimensions of service gate (height*width)	3*3.5 m
Maximum discharge capacity	395 m3/s
Level of outlet no.2	1310 masl
Dimensions of service gate (height*width)	3*3.5 m
Maximum discharge capacity	440 m3/s

Power house
Item	Quantity
Water filling level	1372.7 masl
Water filling capacity	160*2 m3/s
Diameter of concrete water transfer tunnel	6.5 m
Penstock diameter	5.2 m
Maximum height on turbine	177 m
Turbine speed	300 rotations/min

Intake structures

In this regard no data exists.

Outlet structures

In this regard no data exists.

Access roads and bridges

Access roads specifications

Access roads

length (m)

Excavation volume

Embankment volume

Asphalt

Foundation

Under-foundation

Width

Road

Tunnel

(m3)

(m)

Access road to power house- through Lordegan Road

542

660

159797

2000

946

2028

2028

8

Access road to dam crest- right bank

700

-

39000

2000

490

1050

1050

10

Access road to site and upstream cofferdam- right bank

988

-

25000

23000

-

1482

1482

7

Access road to dam crest-left bank

1667

-

110000

31000

1167

2501

2501

10

Access road from entrance bridge and outlet of diversion tunnel- left bank

881

-

49534

9480

-

1322

1322

10

Technical specifications of bridges

Bridge

عرض (متر)

طول دهانه‌ها (متر)

طول کل(متر)

نوع سازه

Upstream cofferdam

10

One mouth 60 m
One mouth 20 m

100

Plate

Downstream of power house

10

Two mouths 20 m
One mouth 40 m

100

Plate

Technical specifications of access tunnels

Name of the tunnel	Width (m)	Length (m)	Height (m)
Access tunnel to power house	11	660	8

Complementary operations

In this regard no data exists.

khersan 3 Project