• Vision:
    Uphold Three Gorges Spirit, Create Overseas Classics
  • Mission:
    Build Overseas Quality Project, Foster Grand Image
    for Pak-China Energy Cooperation

Salient Features

 

Project Information: The 720MW Karot Hydropower Project is designed exclusively for power generation under Build Own Operate Transfer (BOOT) basis with a concession period of 30 years. It has an asphalt core rock-fill dam of 95.5 m height, a separate spillway, intake structure, 3 diversion tunnels, 4 power tunnels and a surface power house containing 4 x 180 MW Francis turbines with warranted output of 116.1MW, average annual electricity output of 3,206 million kW·h, and annual utilization hours of 4,452h.

 

Hydrological Data: The dam site controls the drainage area of 26,700km2; having long term average runoff of 819m3/s and long term average annual runoff of 25.83 billion m3. The project is a single power generation task hydropower complex, with reservoir’s Full Water Level (FWL) of 461m, reservoir storage at FWL of 152 million m3.

 

Construction Time Line: The EPC Contract’s construction period is 5 years plus Defects Notification Period of 2 years for civil works and 3 years for E & M Works. Trial run and commercial operation is planned at the end of 5th year.

 

EPC Contractors: The Civil Works and E & M Works are two separate Contracts with Civil Works Contractor bearing the responsibility to coordinate with the E & M Contractor for timely delivery of the project. Following are the EPC Contracts:

            1. Engineering and Construction Contract: Three Gorges Economy Development Company (TGDC)

            2. Equipment Supply Contract: China Machinery & Electric Company (CMEC).

Salient Features:

            

Items

Units

Quantity or Characteristic

Catchment area

km2

26700

Regulation capability

/

daily regulation

Mean annual flow

m3/s

819

Mean annual runoff

m3

25.83×109

Design flood

Return period

year

500

Flux

m3/s

20700

Check flood

Return period

year

5000

Flux

m3/s

29600

Water level

Normal water level

m.a.s.l

461

Dead water level

m.a.s.l

451

Sediment flushing level

m.a.s.l

446

Storage of reservoir

Total storage below normal water level

m3

1.52×108

Energy

Installed capacity

MW

720

Warranted output

MW

116.1

Annual operation hours

h

4552

Mean annual energy

GWh

3206

Dam

Dam type

/

Asphalt concrete core rock-fill dam

Crest elevation

m.a.s.l

469.5

Maximum dam height

m

95.5

Length of dam crest

m

460

Spillway

Crest elevation

m.a.s.l

469.5

Flood discharge surface outlet size(width×height)

m×m

14×22

Numbers

/

6

Sediment flushing outlet size(width×height)

m×m

9×10

Numbers

/

2

Power House

Type

/

Surface

Size(length×width×height)

m×m×m

164.9×27×60.5

Hydro-generator Unit

Numbers of units

/

4

Type of turbines

/

Francis

Rated Power

MW

180

Rated Capacity

MVA

225

Diversion Tunnels

Numbers of tunnels

/

3

Tunnel diameter

m

12.5

Tunnel length

m/m/m

420.7/447.3/473.8

Construction period

/

Months

60

Economic and Financial

EPC price

Million US$

1277

 

 

 

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