Salient Features


S.NoSalient FeaturesPAKAL DUL HEP (1000 MW)
1 Type of Scheme Run of River Scheme
2 Location
  State Jammu & Kashmir
District Kishtwar
River Marusudar
Latitude 33°27'30'' N
Longitude 75°48'50'' E
Location of Dam Near Village Drangdhuran
Location of Power House Upstream of Dul Dam (Right Bank)
Nearest Rail Head Udhampur
Nearest Airport Jammu
3 Hydrology
  Catchment area at diversion site 3955 Sq. Km
Design Flood 5890 cumec
Location of Catchment  Drangdhuran to Lopara
Latitude 33°24' N-34°12.5'N
Longitude 75°23' E-76°10'E
Avg Annual Rainfall 739mm
Annual Yield
a)90% dependable year
b)75% dependable year

Probable Max. flood(PMF) 5890 cumecs
4 Reservoir
  Full Reservoir Level (FRL) EL 1700.0 m
Maximum Water Level EL 1703.0 m
Minimum Drawdown Level (MDDL) EL 1620.0 m
Gross Storage at FRL 125.4 Mcum(101663.43 Acre feet)
Live Storage 108.39 Mcum(87873.20 Acre Feet)
Dead storage 17.01Mcum
Area under submergence at FRL 2.28 Km²/ 228 hectare
Length of Reservoir 10.25 Km
5 Dam
  Type Concrete Face Rockfill dam
Length of dam at top 305 m
Elevation of top of dam EL. 1707.0 m
River Bed Level EL 1540.0 m
Maximum Height above river bed 167m
Maximum Height above deepest foundation level Shall be updated later
6 Head Race Tunnel (HRT)
  No. ,Diameter & Shape 2 Nos,7.2m dia, Horse–shoe/Circular
Length HRT 1 - 9612M, HRT 2 - 9619 M
Design discharge 309.88 cumec (154.94 cumec each)
Bed Slope HRT-1= 0.7366%
7 Spill Way Surface Spillway Tunnel Spillway
  Type Gated Crest Horse-shoe
Width of Spillway block 35m 10.5m(Dia)
No. Of Bays 2 No. 2 No.
Crest Level of Spillway EL 1684.00 m EL.1580.00 m
No. & Size of Openings 2 nos. 12m(W)x16m(H) 2 nos.6.2m(W)x7m(H)
Length of tunnels 405 m & 430 m  
Capacity at MWL 1780 cumecs(each)  
Discharge Capacity at FRL 1590 cumec (each) 1740 cumec (each)
8 River Diversion
a) Coffer Dam
  Type Rockfill with impervious core
Top of Upstream coffer dam EL 1589.0 m
Top of Downstream coffer dam EL 1545.0 m
b) Diversion Tunnel
  No, Diameter,Shape 1 no., 11.0 m, Horse-shoe
Length 820.22 m including portals
DT Gate 2 No.s Vertical lift Gate(Size4.56m x11m)
Diversion Discharge 2000 cumec
9 Intake Structure
  Number 3 No.
Size of openings 3 Nos, 5.60m(w) x 7.70m(H) each (Including provision of one intake for second stage in future)
Invert Level EL.1605.8 m
Trash Rack Steel Trash rack(Size 88.5m x19.5m)
Gate Arrangement Vertical Gates
10 Energy Dissipation Arrangement
  Type Flip Bucket with preformed plunge pool
Size Shall be updated later
11 Outlet for Environmental Release
  Design Discharge Shall be updated later
Size of Gate Shall be updated later
Crest level Shall be updated later
12 Construction Sluice
  Nos. & Size of opening Shall be updated later
Crest level Shall be updated later
Length Shall be updated later
13 Pressure shaft/Penstock Horizontal / Manifold / Vertical
  No.& Diameter Pressure Shaft- 2 nos; 6.0 m dia.before manifold and 4 no. 3.9 m dia. after manifold (Horizontal)/ 4 nos., 3.9 m dia, circular (Vertical) Penstock- 4 nos; 2.9m
Shape & Type Circular, Steel lined / Steel lined
Design Discharge (each Penstock) Shall be updated later
Length Pressure Shaft-6.0 m dia- 423.45m (Horizontal); 3.9 m dia- 1528.7m (Horizontal & Vertical) Penstock-2.9m dia-290.4m
14 MIV Cavern
  Cavern Size 105 m (L) x 10 m(W) x 19 m(H)
15 Power House Cavern
  Type Underground
Installed Capacity 1000 MW (4 x 250 MW)
Type of Turbine Vertical Francis
Net Rated Head 397.30 m
MIV Dia and Type 2.9 m dia Spherical valve
Design Discharge 77.47 cumec (each unit)
Cavern Size 166m (L) x 20.2 m(W) x 50.5 m(H)
16 Transformer cum Draft tube gate cavern
  Cavern Size 123.6 m (L) x 16 m(W) x 13.1 m(H)
17 Tail Race Tunnel
  No.& Type 4 nos, concrete lined
Dia & Shape 5.5 m, Horse-shoe
Design Discharge 77.47 cumec (each)
Length 113.5 m (each)
18 TRT outlet
  Number 4 nos.
Size of opening 5.5m x 5.5m
Weir crest level EL. 1254.4m
Deck level EL.1275.0m
Minimum TWL in River EL.1255.0m
Normal TWL in River (All operating units) Shall be updated later
Maximum TWL in River (PMF) Shall be updated later
19 Power Generation
  Annual Energy Generation in 90 % dependable year 3330.18 MU
Plant Load Factor 38.30%
20 Peaking Hours 3.0 Hours
Continuos generation using live storage capacity - 96.66 Hours (about 4 days)
21 Tariff
  1st year Tariff Rs. 4.54/unit
Levelised Tariff Rs. 4.28/unit
22 Project Cost Rs. 8112.12 Crs (March 13 PL)