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Salient Features

Technical Information

Item

 

Reservoir

Full Supply Level (FSL)

415.0 m

Minimum Operating Level (MOL)

378.0 m

Available depth

37.0 m

Sedimentation level

320.0 m

Gross Storage Capacity

295.1 X 106 m3

Effective Storage Capacity

During First 10 years; 192.8 X 106 m3

After 11th years; 181.7 X 106 m3

Dam

Type

Concrete Gravity Dam

Elevation of Dam Crest

420.0 m

Height of Dam

140.0 m

Length of Dam Crest

175.0 m

Volume of Dam

806 X103 m3

Sediment Flushing Facilities

Inlet Still Elevation

320.0 m

Gradient of Conduit

1:15 m

Upstream Maintenance Gate

Span X Height

Slide Type Steel Gate

5 m X 5 m

Intermediate Maintenance Gate

Span X Height

High Pressure Slide Gate

5 m X 5 m

Downstream Auxiliary Gate

Span X Height

High Pressure Slide Gate

5 m X 5 m

Spillway

Design flood

7,377 m3/s

Type

Chute

Elevation of Overflow Crest

EL. 399.0 m

Width of Overflow Crest

49.5 m

Energy Dissipater

Ski Jump

Type of Gate

Radial

Size of Gate

16.5 m span X 16.5 m height

Intake

Number

1

Type

Tower Type Intake

Headrace Tunnel

Number

One

Inner Diameter

7.4 m

Total Length

1,162 m

Penstock

Type

Tunnel

Number

One

Inner Diameter

7.4 m to 3.1 m

Total Length

175 m

Draft Tunnel

Length

85.8 m

Tailrace Tunnel

Diameter

7.4 m

Length

117 m

Power House

Type

Underground

Size

27 m wide X 46 m high X 97 m long

Development Plan

Rated Intake Water Level

405.0 m

Tail Water Level

289.2 m

Gross Head

115.8 m

Effective Head

112.5 m

Maximum Discharge

127.4 m

Number of Unit

Two

Installed Capacity

Rated Capacity: 127  MW

Maximum Capacity: 140  MW

Peak Time

6 hours

Primary Energy

During first 10 years: 266.2 GWh

After 11th  years: 241.4 GWh

Secondary Energy

During first 10 years: 319.5 GWh

After 11th  years: 248.5 GWh (Excluding Generation Facility for Environmental Flow)

Total Energy

During first 10 years: 585.7 GWh

After 11th  years: 489.9 GWh (Excluding Generation Facility for Environmental Flow)

Turbine

Type

Vertical Shaft, Francis Turbine

Number

Two

Rated Output

71,800 kW

Generator

Type

Three Phase, Synchronous Generator

Number

Two

Rated Output

74,700 kVA per unit

Revolving Speed

300 RPM

Frequency

50 Hz

Voltage

13.2 kV

Power Factor

0.85 lag

Main Transformer

Type

Indoor, Special Three-phase, Forced-oil- circulated and forced-water-cooled

Number

Two

Capacity

82,300 kVA

Voltage

Primary  13.2 kV

Secondary  220 kV

Switchyard

Type

Gas Insulated Switchyard (GIS)

Bus System

Single Bus

Number of Lines Connected

Double Circuit Transmission Line

Voltage

220 kV

Transmission Line

Length

39 km

Type of Transmission Tower

Steel Lattice Tower

Number of Circuit

Two

Voltage

220 kV

Conductor Type

380 mm2 X ACSR (Bison)

Generation Facility for Environmental Flow

Rated Output and Maximum Output

1,700 kW & 1,900 kW

Effective Head

92 m

Discharge

2.4 m3

Distribution Line Voltage

11 kV or 33 kV

Turbine Type

Horizontal Type, Francis Turbine

Generator Type

Horizontal Type, Three-Phase Synchronous Generator

Distribution Transformer

Dry or oil immersed, Capacity: 1,970 kVA

Average energy

During first 10 years: 14.0 GWh

After 11th years: 13.0 GWh