|
 Warsak Hydro Electric Power Project is located on River Kabul at about 30 km from Peshawar in North-West Frontier Province of Pakistan. The project financed by Canadian Government was completed under COLOMBO PLAN in two phases. In general, the project consists of a mass concrete gravity dam with integral spillway, power tunnel, power station, a concrete lined 10 feet diameter irrigation tunnel on right bank and a 3 feet diameter steel pipe irrigation conduit on the left bank of the reservoir. The 250 ft. high and 460 ft. long dam with reservoir of 4 square miles had a live storage capacity of 25,300 acre-feet of water for irrigation of 119,000 acres of land and meeting power generation requirement. A spillway with nine gates is capable to discharge 540,000 cusecs of flood water.
POWER STATION
The first phase including construction of Dam, Irrigation tunnel, civil works for Phase-II and installation of four units each of 40 MW capacity with 132 kv transmission system, was completed in 1960 at a total cost of Rs.394.98 million. Two additional generating units each of 41.48 MW capacity were added in 1980-81 at a cost of Rs.106.25 million as second phase of the project.
Warsak Dam has now completely silted up and practically there is no available storage. Power generation is being achieved according to water inflows in River Kabul like a "Run-of-the-River' project. Lean flow period at Warsak is observed from October to March during which capability reduces to about 100 MW (Peak).
Salient features of main components of Warsak Dam and Power House are as under:
Warsak Dam
| Type |
Mass Concrete Gravity Dam |
 |
Height |
250 ft. |
76.20 meters |
Length |
460 ft. |
140.21 meters |
|
Reservoir
| Max. Conservation Level |
1270 ft. SPD |
387.10 meter |
| Design Live Storage |
25300 AF |
|
| Existing Live Storage |
Nil |
|
| Surface Area |
4.0 sq. miles |
10.36 sq. km |
|
Main Spillway
| Type |
Overflow |
|
| Capacity Per Gate |
60,000 cusecs |
|
| No. of Gates |
9 (Nine) |
|
| Size of Gate |
40 ft. wide
40 ft. high
|
12.19x12.19 meters |
|
Power House
| UNITS |
1~4 |
5~6 |
Turbine (Francis-Vertical)
|
|
| Output (BHP)
Rated Head (Ft. of Water)
Make
|
55000
144
Dominion Engg. Co.
Canada
|
57000
144
Dominion Engg. Co.
Canada
|
Generators (Umbrella Type)
|
|
| Output (MVA)
Output (MW)
Output (P.F)
Output (K.V)
Rated Speed (RPM)
Make
|
40
40
1.0
11.0
136.3
Canadian General Elec. Co. Ltd.
|
48.8
41.5
0.85
11.0
136.3
Canadian General Elec. Co. Ltd.
|
Transformers
|
|
Capability (MVA)
Voltage Ratio (KV)
Make
|
13.33 Per Phase
(Single-Phase Bank)
11/132 KV
Sarranti, Canada
|
48.8
(Three-Phase)
11/132 KV
Westinghouse
|
|
Project Benefits
Besides providing irrigation water from the dam during early years of its life, the project has generated over 34.217 Billion KWh of cheap energy since its commissioning. Annual generation during 2006~2007 was 1035.375 Million KWh while the station shared 218 MW peak load.
WARSAK REHABILITATION PROJECT
• General
Warsak Power Station attained its ultimate capacity of 243 MW in 1981. With the passage of time, this capacity reduced to 150 MW due to following reasons:
- Structural deformation of Power House.
- Rapid erosion in the hydraulic equipment due to excessive and abrasive natured silt carried in River Kabul.
These operating conditions necessitated a comprehensive plan for rehabilitation of Warsak.
• Project Objectives
A Rehabilitation Project was planned with the assistance of Canadian Government having following objectives:
- To restore full generating capacity of Warsak Power Station.
- To prolong useful life of the project by another 30 to 40 years by rectifying various problems of civil structures and electrical & mechanical equipment.
Scope
Replacement of Power House Overhead Crane, modification of Butterfly Valves of the Units complete refurbishing/major overhauling of all the units, providing new Trash Racks and Semi Automatic Trash Rack Cleaning Machine, repair of Embedded Guides for Draft Tube Gates, repair of Spillway Gates and Sill Beams, repair of Power House Roof, Floors and Walls, replacement of old 132 kV Circuit Breakers with SF-6 Breakers.
Main features of
WARSAK REHABILITATION PROJECT
• Cost of Project
| FOREIGN |
(CIDA GRANT) |
C$ 27.038 M |
 |
PC-I
APPROVED
IN
APRIL 1992
|
|
EQUIVALENT TO |
Rs. 609.00 M |
| LOCAL |
|
Rs. 716.00 M
|
|
TOTAL |
Rs. 1325.00 M |
| CONSULTANTS |
|
|
|
Foreign: M/s SNC-Shawinigan Inc., Canada
Local: M/s Nespak of Pakistan
|
• Schedule
| COMMENCEMENT |
DECEMBER, 1996 |
| COMPLETION PERIOD (PC-I) |
53 MONTHS |
| ACTUAL COMPLETION (EXPECTED) |
MARCH, 2006 |
|
