Dumkhar Hydroelectric Dam
Dumkhar Hydroelectricity is a run of the river power project on the Indus river in the Leh district of Jammu and Kashmir, India, located at AbOUT 128 km from Leh city on Leh-Khalsi Batalik road at Latitude 340 28’ 09’’, Longitude 760 40’ 06’’. The project cost is Rs. 527.45 crores including IDC at June, 2003 price level.
Scope of works
The Dumkhar Hydro-electricity project envisages construction of:
- A 42 m high and 220m long concrete gravity dam across river Indus with FRL 2856 m and MDDL 2853 m.
- Two nos. diversion tunnels, horse shoe shaped, 10 m dia, 450m long.
- A surface power house having an installation of 3 nos vertical shaft Kaplan turbines, each unit having generation capacity of 15 MW under rated net head of 27.83 m
Technical specification
Dam
Type: Concrete gravity dam
Top elevation of dam: El 2857.0 m
Height of dam above: 42m
Length of dam at top: 220m
Diversity tunnel
Number: 2 Nos
Dia & Shape: 10 m dia horse shoe
Length: 450 m
Reservoir
Full reservoir level (FRL): El 2856 m
Maximum water level (MWL): El 2856.0 m
Min.Draw Down Level (MDDL): El 2853.0 m
Gross storage
at FRL: 26.4 Mcum
at MDDL: 23.0 Mcum
Area under submergence at FRL: 2.85 km2
Spillway
Design flood: 4650 cumec
Type: Orifice type
Crest elevation El 2830 m
Number & size of pillway opening: 4 No, 8.2 m x 12 m
Energy dissipation: Stilling Basin
Length of spillway: 56.8 m
Intake
Invert level: El 2841 m
Number: 3
Size of gate opening: 3.2 m x 4.0 m
Trash rack: Inclined type
Penstock
Number: 3 Nos
Size: 4 m dia
Shape: Circular
Design discharge: 67.23 cumec
Power house
Type : Surface
Size
Machine Hall: 50 mX 19.5 m
Service Bay: 23m X 19.5m
Installed capacity: 3X15 MW
Number of units: 3 Nos
Type of turbine: Vertical shaft Kaplan
Maximum gross head: 32m
Rated net head: 27.83 m