Hydel GenerationSalient FeaturesPower StationsPerformanceMangla Dam
Tarbela DamWarsak Dam
Chashma Hydropower Project

Mangla Dam

Mangla Dam Project was actually conceived in 1950's as a multipurpose project to be constructed at a place called Mangla on river Jhelum located about 30 km upstream of Jhelum city (120 km from Capital Islamabad). The initial investigation and its feasibility studies were completed in 1958. Later on the project was included in the Indus Basin Project.

The construction of Mangla Dam was started in 1962 and completed in 1967.

PURPOSE OF THE PROJECT
Mangla Dam is a multipurpose project primarily meant for affecting part replacement of water supplies of three eastern rivers from Jhelum river. Besides, it is designed to conserve and control flood water of river Jhelum through significant reduction in flood peaks and volumes at downstream by incidental use of the available storage space. The other by products are power generation to meet the power demand of the country, fish culture to provide protein rich diet, tourism to provide healthy recreation facilities to the people and navigation.

PROJECT COMPONENTS
The project consists of two dams (Main Dam & Jari Dam), two dykes to contain reservoir, two spillway for outflow regulations, intake structures with five tunnels, a power house and a tailrace canal.

POWER HOUSE
Power House has been constructed at the toe of intake embankment at the ground surface elevation of 865 ft. SPD. The water to power house is supplied through five steel lined tunnels of 30/26 ft. diameter. Each tunnel is designed to feed two generating units. The power house tailrace discharges into New Bong Canal which has a length of 25,000 ft. with discharge capacity of about 49,000 cusecs, and terminates at an automatic gate control headworks at about 12 km downstream located near old Bong Escape Headworks.

During the high reservoir

Salient features/Principal data of main components of Mangla Dam and Power House

Reservoir
Type Earth-fill
Max. Conservation Level 1202 ft. SPD 366.37 meters SPD
Min Operation Level 1040 ft. SPD 317.0 meters
Design Gross Storage 5.880 MAF
Existing Gross Storage 4.674 MAF
Design Live Storage 5.340 MAF
Existing Live Storage 4.542 MAF
Surface Area 100 sq. miles 259 sq. km.

Main Spillway
Type Submerged Orifice
Capacity (at pool elev.of 1202 ft. SPD) 870,000 cusecs 24,630 cumecs
No. of Gates 9 (Nine)
Size of Gate 36 ft. wide
40 ft. high
10.97x12.19 meters

Power House
UNITS 1~4 5~6 7~8 9~10
Turbine (Francis-Vertical)
Output (BHP)

Rated Head (Ft. of Water)

Make

138000

295

Mitsubishi
Japan

138000

295

CKD Blansko
(Czech.)

138000

295

Escherwyse-
ACEC Belguim

138000

295

SKODA
(Czech.)

Generators (Umbrella Type)
Output (MVA)

Output (MW)

Output (P.F)

Output (K.V)

Rated Speed (RPM)

Make

125
15% overload

100

0.8

12.5

166.7

Hitachi Japan

125
15% overload

100

0.8

12.5

166.7

Skoda Czech.

125
15% overload

100

0.8

12.5

166.7

Hitachi Japan

125
15% overload

10

0.8

12.5

166.7

Skoda Czech.

Transformers (3-Phase)
Capability (MVA)

Voltage Ratio (KV)

Make

138

• 12.5 / 132
  [Unit 1~2]
• 12.5 / 220
  [Unit 3~4]

Savigliano [1&4]
Skoda [2&3]

138

12.5/220

Savigliano
Italy

144

12.5/220

Italtrafo [Unit-7]
Skoda [Unit-8]

144

12.5/220

Skoda
Czech.

 


Project Benefits

Besides providing timely irrigation supplies to agriculture, the project has generated 183.551 Billion units of low cost Hydel energy since its commissioning. Annual Generation during 2008-2009 was 4797.425 Million KWh while the Station shared 1150 MW peak load which was 8.18% of total WAPDA System Peak.

Updated:  September  30, 2009


 
[the authority
[power wing [power generation [power transmission [power distribution
[water wing
[ongoing / future projects
[customer services
[training
[investors information
[news & media
[home [back